AGREEMENT AND PLAN OF MERGER

AGREEMENT AND PLAN OF MERGER

BY AND AMONG

ALLIED WORLD ASSURANCE COMPANY HOLDINGS, AG,

GO SUB, LLC

AND

TRANSATLANTIC HOLDINGS, INC.

DATED AS OF JUNE 12, 2011

TABLE OF CONTENTS

				Page
ARTICLE I.		THE MERGER			1
1.1		The Merger			1
1.2		Closing			1
1.3		Effective Time			2
1.4		Effects			2
1.5		Certificates of Incorporation and Bylaws			2
ARTICLE II.		EFFECT ON CAPITAL STOCK; EXCHANGE OF CERTIFICATES			3
2.1		Effect on Capital Stock			3
2.2		Exchange of Certificates			4
2.3		Transatlantic Stock Options and Other Equity Awards			7
2.4		Further Assurances			9
ARTICLE III.		REPRESENTATIONS AND WARRANTIES OF ALLIED WORLD AND MERGER SUB			9
3.1		Corporate Organization			9
3.2		Capitalization			10
3.3		Corporate Authorization			13
3.4		Governmental Authorization			14
3.5		Non-Contravention			14
3.6		Allied World SEC Filings, Etc.			15
3.7		Allied World Financial Statements			17
3.8		Form S-4			17
3.9		Absence of Certain Changes or Events			17
3.10		No Undisclosed Material Liabilities			17
3.11		Compliance with Laws			18
3.12		Litigation			18
3.13		Title to Properties; Absence of Liens			19
3.14		Opinion of Financial Advisor			19
3.15		Taxes			19
3.16		Employee Benefit Plans			21
3.17		Employees, Labor Matters			23
3.18		Environmental Matters			23
3.19		Intellectual Property			24
3.20		Allied World Material Contracts			24
3.21		Brokers’ and Finders’ Fees			25
3.22		Takeover Laws			25
3.23		Affiliate Transactions			25
3.24		Insurance Subsidiaries			25

				Page
3.25		Statutory Statements; Examinations			26
3.26		Agreements with Regulators			27
3.27		Reinsurance and Retrocession			27
3.28		Rating Agency			28
3.29		Reserves			29
3.30		Risk-Based Capital			29
3.31		Insurance Issued by the Allied World P/C Subsidiaries			29
3.32		Other Allied World Insurance Business			30
3.33		Redomestication			31
3.34		No Other Representations and Warranties; Disclaimer			31
ARTICLE IV.		REPRESENTATIONS AND WARRANTIES OF TRANSATLANTIC			31
4.1		Corporate Organization			32
4.2		Capitalization			32
4.3		Corporate Authorization			34
4.4		Governmental Authorization			35
4.5		Non-Contravention			35
4.6		Transatlantic SEC Filings, Etc.			36
4.7		Transatlantic Financial Statements			37
4.8		Form S-4			38
4.9		Absence of Certain Changes or Events			38
4.10		No Undisclosed Material Liabilities			38
4.11		Compliance with Laws			38
4.12		Litigation			39
4.13		Title to Properties; Absence of Liens			39
4.14		Opinion of Financial Advisor			40
4.15		Taxes			40
4.16		Employee Benefit Plans			41
4.17		Employees, Labor Matters			43
4.18		Environmental Matters			44
4.19		Intellectual Property			44
4.20		Transatlantic Material Contracts			45
4.21		Brokers’ and Finders’ Fees			46
4.22		Takeover Laws			46
4.23		Affiliate Transactions			46
4.24		Insurance Subsidiaries			46
4.25		Statutory Statements; Examinations			46
4.26		Agreements with Regulators			47
4.27		Reinsurance and Retrocession			48
4.28		Rating Agency			49
4.29		Reserves			49
4.30		Risk-Based Capital			50
4.31		Transatlantic Insurance Business			50
4.32		Other Transatlantic Insurance Business			50
4.33		No Other Representations and Warranties; Disclaimer			51

				Page
ARTICLE V.		COVENANTS RELATING TO CONDUCT OF BUSINESS			52
5.1		Conduct of Businesses Prior to the Effective Time			52
5.2		Allied World Forbearances			52
5.3		Transatlantic Forbearances			55
5.4		Control of Other Party’s Business			57
5.5		No Solicitation			58
ARTICLE VI.		ADDITIONAL AGREEMENTS			62
6.1		Preparation of the Form S-4 and the Joint Proxy Statement; Stockholders Meetings			62
6.2		Access to Information; Confidentiality			64
6.3		Required Actions			65
6.4		Actions with Respect to Certain Existing Indebtedness			68
6.5		Indemnification and Directors and Officers Insurance			69
6.6		Fees and Expenses			70
6.7		Transaction Litigation			74
6.8		Section 16 Matters			74
6.9		Governance Matters			74
6.10		Retention Program and Employee Waivers			77
6.11		Transatlantic Common Stock Purchase			77
6.12		Cantonal Tax Ruling			77
6.13		Commercial Register Ruling			78
ARTICLE VII.		CONDITIONS PRECEDENT			78
7.1		Conditions to Each Party's Obligation to Effect the Merger			78
7.2		Conditions to Obligations of Allied World			79
7.3		Conditions to Obligations of Transatlantic			80
ARTICLE VIII.		TERMINATION AND AMENDMENT			80
8.1		Termination			80
8.2		Effect of Termination			81
8.3		Amendment			82
8.4		Extension; Waiver			82
ARTICLE IX.		GENERAL PROVISIONS			82
9.1		Nonsurvival of Representations and Warranties			82
9.2		Notices			82
9.3		Definitions			83
9.4		Interpretation			90
9.5		Severability			91
9.6		Counterparts			91
9.7		Entire Agreement; No Third-Party Beneficiaries			91
9.8		Governing Law			91

				Page
9.9		Assignment; Successors; Tax Treatment			91
9.10		Specific Enforcement			92
9.11		Submission to Jurisdiction			92
9.12		Waiver of Jury Trial			93
9.13		No Presumption Against Drafting Party			93
9.14		Publicity			93
Annex A		Defined Terms			A-1
Exhibit A		Certificate of Incorporation of the Surviving Corporation
Exhibit B		Bylaws of the Surviving Corporation
Exhibit C		Restated Articles of Association of Allied World
Exhibit D		Amended and Restated Organizational Regulations of Allied World

AGREEMENT AND PLAN OF MERGER

     This AGREEMENT AND PLAN OF MERGER (this “Agreement”), dated as of June 12, 2011, is by and among Allied World Assurance Company Holdings, AG, a corporation limited by shares organized under the laws of Switzerland (“Allied World”), GO Sub, LLC, a Delaware limited liability company and a wholly owned subsidiary of Allied World (“Merger Sub”), and Transatlantic Holdings, Inc., a Delaware corporation (“Transatlantic”).

     WHEREAS, the respective Boards of Directors of Allied World and Transatlantic deem it advisable and in the best interests of each corporation and its respective stockholders that Allied World and Transatlantic engage in a business combination in order to advance the long-term strategic business interests of each of Allied World and Transatlantic;

     WHEREAS, the respective Boards of Directors of Allied World and Transatlantic have determined that such business combination shall be effected pursuant to the terms of this Agreement through the Merger in accordance with the applicable provisions of Delaware Law;

     WHEREAS, the respective Boards of Directors of Allied World and Transatlantic and the sole member of Merger Sub have approved and declared advisable this Agreement and the Merger, and determined that the terms of this Agreement and the Merger are in the respective best interests of Allied World, Transatlantic or Merger Sub, as the case may be, and the stockholders of Allied World and Transatlantic and the sole member of Merger Sub; and

     WHEREAS, Allied World, Transatlantic and Merger Sub desire to make certain representations, warranties, covenants and agreements in connection with the Merger and also to prescribe various conditions to the Merger.

     NOW, THEREFORE, in consideration of the foregoing and intending to be legally bound hereby, the parties hereto agree as follows:

ARTICLE I.
THE MERGER

     1.1 The Merger. On the terms and subject to the conditions set forth in this Agreement, and in accordance with the General Corporation Law of the State of Delaware (“Delaware Law”), on the Closing Date, Merger Sub shall be merged with and into Transatlantic (the “Merger”). At the Effective Time, the separate limited liability company existence of Merger Sub shall cease and Transatlantic shall continue as the surviving corporation in the Merger (the “Surviving Corporation”). As a result of the Merger, Transatlantic shall become a wholly owned subsidiary of Allied World.

     1.2 Closing. The closing (the “Closing”) of the Merger shall take place at the offices of Gibson, Dunn & Crutcher LLP, 200 Park Avenue, New York, New York 10166 at 10:00 a.m., Eastern time, as promptly as practicable (but in no event later than the second Business Day) following the satisfaction or (to the extent permitted by Law) waiver by the party or parties entitled to the benefits thereof of the conditions set forth in Article VII (other than those conditions that by their nature are to be satisfied at the Closing, but subject

to the satisfaction or (to the extent permitted by Law) waiver of those conditions), or at such other place, time and date as shall be agreed in writing between Allied World and Transatlantic. The date on which the Closing occurs is referred to in this Agreement as the “Closing Date.”

     1.3 Effective Time. Subject to the provisions of this Agreement, as soon as practicable on the Closing Date, the parties shall file (i) with the Secretary of State of the State of Delaware, the certificate of merger relating to the Merger (the “Certificate of Merger”) and (ii) with the appropriate Swiss Governmental Entity, the Restated Articles, in each case in such form as required by, and executed and acknowledged in accordance with, the relevant provisions of Delaware Law and the Laws of Switzerland, as applicable, and, as soon as practicable on or after the Closing Date, shall make all other filings required under applicable Law in connection with the Merger. The Merger shall become effective at the time that the Certificate of Merger has been duly filed with the Secretary of State of the State of Delaware, or at such later time as Allied World and Transatlantic shall agree and specify in the Certificate of Merger (the time the Merger becomes effective being the “Effective Time”). The Restated Articles shall be filed with the appropriate Swiss Governmental Entity immediately prior to the filing of the Certificate of Merger and shall become effective at the Effective Time.

     1.4 Effects. The Merger shall have the effects set forth in this Agreement and the applicable provisions of Delaware Law.

     1.5 Certificates of Incorporation and Bylaws.

               (a) Surviving Corporation Certificate of Incorporation and Bylaws. The certificate of incorporation of Transatlantic, as in effect immediately prior to the Effective Time, shall be amended and restated at the Effective Time to read in the form of Exhibit A and, as so amended and restated, such certificate of incorporation shall be the certificate of incorporation of the Surviving Corporation until thereafter changed or amended as provided therein or by applicable Law. The bylaws of Transatlantic shall be amended and restated at the Effective Time to read in the form of Exhibit B and, as so amended and restated, such bylaws shall be the bylaws of the Surviving Corporation until thereafter changed or amended as provided therein or by applicable Law.

               (b) Allied World Articles of Association. Subject to receipt of the Allied World Articles Amendment Stockholder Approval, the Allied World Articles (as in effect immediately prior to the Effective Time) shall be amended and restated (the “Allied World Articles Amendment”) as of the Effective Time to read in the form of Exhibit C (the “Restated Articles”) and, as so amended and restated, such articles of association shall be the articles of association of Allied World until thereafter changed or amended as provided therein or by applicable Law. The Restated Articles shall provide, among other things, that the name of Allied World shall be changed at the Effective Time to “TransAllied Group Holdings, AG.”

               (c) Allied World Organizational Regulations. The organizational regulations of Allied World shall be amended and restated as of the Effective Time to read in the form of Exhibit D and, as so amended and restated, such organizational regulations shall be the

organizational regulations of Allied World until thereafter changed or amended as provided therein or by applicable Law.

ARTICLE II.
EFFECT ON CAPITAL STOCK;
EXCHANGE OF CERTIFICATES

     2.1 Effect on Capital Stock.

          (a) At the Effective Time, by virtue of the Merger and without any action on the part of Allied World, Transatlantic, Merger Sub or the holder of any shares of Transatlantic Common Stock or any limited liability company interest of Merger Sub:

          (i) Limited Liability Company Interest of Merger Sub. The sole limited liability company interest of Merger Sub (the “Merger Sub Common Stock”) issued and outstanding immediately prior to the Effective Time shall be converted into one hundred (100) fully paid and nonassessable shares of common stock, par value $0.01 per share, of the Surviving Corporation.

          (ii) Cancellation of Certain Stock. Each share of common stock, par value $1.00 per share, of Transatlantic (the “Transatlantic Common Stock”), issued and outstanding immediately prior to the Effective Time that is owned by Transatlantic or its Subsidiaries and each share of Transatlantic Common Stock issued and outstanding immediately prior to the Effective Time that is owned by Allied World, Merger Sub or any of their respective Subsidiaries shall no longer be outstanding and shall automatically be canceled and shall cease to exist, and no consideration shall be delivered in exchange therefor.

          (iii) Conversion of Transatlantic Common Stock. Subject to Section 2.2(e), each share of Transatlantic Common Stock issued and outstanding immediately prior to the Effective Time (other than shares to be canceled in accordance with Section 2.1(a)(ii)), shall be converted into the right to receive 0.88 (the ratio of such number to 1, the “Exchange Ratio”) validly issued, fully paid and nonassessable registered ordinary shares, par value CHF 15.00 per share (as may be adjusted in connection with the payment of dividends by virtue of a par value reduction, as approved by Allied World’s shareholders at its 2011 annual general meeting), of Allied World (the “Allied World Shares” and, such Allied World Shares into which shares of Transatlantic Common Stock are converted pursuant to this Section 2.1(a)(iii), together with any cash paid in lieu of fractional shares pursuant to Section 2.2(e), the “Merger Consideration”). All shares of Transatlantic Common Stock converted pursuant to this Section 2.1(a)(iii), when so converted, shall no longer be outstanding and shall automatically be canceled and shall cease to exist, and each holder of a certificate that, immediately prior to the Effective Time, represented any such shares of Transatlantic Common Stock shall cease to have any rights with respect thereto, except the right to receive the Merger Consideration and any dividends or other distributions to which holders become entitled upon the surrender of such shares of Transatlantic Common Stock in accordance with Section 2.2(c), without interest.

               (b) Certain Adjustments. If, between the date of this Agreement and the Effective Time (and as permitted by Article V), the outstanding shares of Allied World Capital Stock or Transatlantic Common Stock shall have been changed into a different number of shares or a different class of shares by reason of any stock dividend, subdivision, reorganization, reclassification, recapitalization, stock split, reverse stock split, combination or exchange of shares, or any similar event shall have occurred, then the Merger Consideration shall be appropriately and proportionately adjusted to provide to the holders of Allied World Capital Stock and the holders of Transatlantic Common Stock the same economic effect as contemplated by this Agreement prior to such event.

     2.2 Exchange of Certificates.

               (a) Exchange Agent. Prior to the Effective Time, Allied World and Transatlantic shall appoint a commercial bank or trust company to be mutually agreed upon to act as exchange agent (the “Exchange Agent”) for the purpose of exchanging (i) certificates that immediately prior to the Effective Time evidenced shares of Transatlantic Common Stock (“Certificates”) or (ii) uncertificated shares of Transatlantic Common Stock represented by book-entry (“Book-Entry Shares”), in each case, for the applicable Merger Consideration pursuant to an exchange agent agreement. Allied World shall deposit, or shall cause to be deposited, with the Exchange Agent at or prior to the Effective Time, (x) evidence of Allied World Shares in book-entry form issuable pursuant to Section 2.1 (and/or certificates representing such shares, at Allied World’s election), and (y) cash sufficient for payment in lieu of fractional Allied World Shares pursuant to Section 2.2(e). Allied World shall make available from time to time after the Effective Time as necessary, cash in an amount sufficient to pay any dividends or distributions to which holders of shares of Transatlantic Common Stock may be entitled pursuant to Section 2.2(c). All such Allied World Shares and cash deposited with the Exchange Agent pursuant to this Section 2.2(a) is hereinafter referred to as the “Exchange Fund.”

               (b) Exchange Procedures. As soon as reasonably practicable after the Effective Time, Allied World shall cause the Exchange Agent to mail to each holder of Certificates or Book-Entry Shares whose shares were converted pursuant to Section 2.1(a)(iii) into the right to receive the Merger Consideration (A) a letter of transmittal for use in such exchange (which shall be in form and substance reasonably satisfactory to Allied World and Transatlantic and shall specify that the delivery shall be effected, and risk of loss and title in respect of the Certificates or Book-Entry Shares shall pass, only upon proper delivery of the Certificates to the Exchange Agent or, in the case of Book-Entry Shares, upon adherence to the procedures set forth in the letter of transmittal) and (B) instructions to effect the surrender of the Certificates or Book-Entry Shares in exchange for the applicable Merger Consideration and any dividends or other distributions payable in respect thereof pursuant to Section 2.2(c). Upon proper surrender of a Certificate or Book-Entry Share to the Exchange Agent, together with such letter of transmittal, duly completed and validly executed in accordance with the instructions thereto, and such other documents as may reasonably be required by the Exchange Agent, the holder of such Certificate or Book-Entry Share shall be entitled to receive in exchange therefor (x) Allied World Shares representing that number of whole Allied World Shares that such holder has the right to receive in respect of the aggregate number of shares of Transatlantic Common Stock previously represented by such Certificate or Book-Entry Share pursuant to Section 2.1 and (y) a check representing cash in lieu of fractional shares that the holder has the right to

receive pursuant to Section 2.2(e) and in respect of any dividends or other distributions that the holder has the right to receive pursuant to Section 2.2(c). Until surrendered as contemplated by this Section 2.2, each Certificate and Book-Entry Share shall be deemed at any time after the Effective Time to represent only the right to receive, upon such surrender, the Merger Consideration that the holder of such Certificate or Book-Entry Share has the right to receive in respect thereof pursuant to Section 2.1 (and cash in respect of any dividends or other distributions pursuant to Section 2.2(c)). No interest shall be paid or shall accrue on the cash payable upon surrender of any Certificate or Book-Entry Share.

          (c) Treatment of Unexchanged Shares. No dividends or other distributions declared or made with respect to Allied World Shares with a record date after the Effective Time shall be paid to the holder of any unsurrendered Certificate or Book-Entry Share with respect to the Allied World Shares deliverable upon surrender thereof, and no cash payment in lieu of fractional shares shall be paid to any such holder pursuant to Section 2.2(e), until the surrender of such Certificate or Book-Entry Share in accordance with this Article II. Subject to escheat or other applicable Law, following surrender of any such Certificate or Book-Entry Share, there shall be paid to the holder thereof, without interest, (i) at the time of such surrender, the amount of any cash payable in lieu of a fractional Allied World Share that such holder has the right to receive pursuant to Section 2.2(e) and the amount of dividends or other distributions with a record date after the Effective Time theretofore paid with respect to such number of whole Allied World Shares that such holder has the right to receive pursuant to Section 2.1(a)(iii) and (ii) at the appropriate payment date, the amount of dividends or other distributions with a record date after the Effective Time but prior to such surrender and a payment date subsequent to such surrender payable with respect to such number of whole Allied World Shares that such holder has the right to receive pursuant to Section 2.1(a)(iii).

          (d) No Further Ownership Rights in Transatlantic Common Stock. The Allied World Shares delivered and cash paid in accordance with the terms of this Article II upon conversion of any shares of Transatlantic Common Stock shall be deemed to have been delivered and paid in full satisfaction of all rights pertaining to such shares of Transatlantic Common Stock. From and after the Effective Time, (i) all holders of Certificates and Book-Entry Shares shall cease to have any rights as stockholders of Transatlantic other than the right to receive the Merger Consideration and any dividends or other distributions that holders have the right to receive upon the surrender of such Certificate or Book-Entry Share in accordance with Section 2.2(c), without interest, and (ii) the stock transfer books of Transatlantic shall be closed with respect to all shares of Transatlantic Common Stock outstanding immediately prior to the Effective Time. From and after the Effective Time, there shall be no further registration of transfers on the stock transfer books of the Surviving Corporation of shares of Transatlantic Common Stock that were outstanding immediately prior to the Effective Time. If, after the Effective Time, any Certificates or Book-Entry Shares formerly representing shares of Transatlantic Common Stock are presented to the Surviving Corporation, Allied World or the Exchange Agent for any reason, such Certificates or Book-Entry Shares shall be canceled and exchanged as provided in this Article II.

          (e) No Fractional Shares. No fractional Allied World Shares shall be issued in connection with the Merger, no certificates or scrip representing fractional Allied World Shares shall be delivered upon the conversion of Transatlantic Common Stock pursuant to

Section 2.1, and such fractional share interests shall not entitle the owner thereof to vote or to any other rights of a holder of Allied World Shares. Notwithstanding any other provision of this Agreement, each holder of shares of Transatlantic Common Stock converted pursuant to the Merger who would otherwise have been entitled to receive a fraction of an Allied World Share (after aggregating all shares represented by the Certificates and Book-Entry Shares delivered by such holder) shall receive, in lieu thereof and upon surrender thereof, cash (without interest) in an amount equal to such fractional amount multiplied by the last reported sale price of Allied World Shares on the New York Stock Exchange (the “NYSE”) (as reported in The Wall Street Journal (Northeast edition) or, if not reported therein, in another authoritative source mutually selected by Allied World and Transatlantic) on the first trading day immediately following the date on which the Effective Time occurs.

          (f) Termination of Exchange Fund. Any portion of the Exchange Fund (including any interest or other amounts received with respect thereto) that remains unclaimed by, or otherwise undistributed to, the holders of Certificates and Book-Entry Shares for 180 days after the Effective Time shall be delivered to Allied World, upon demand, and any holder of Certificates or Book-Entry Shares who has not theretofore complied with this Article II shall thereafter look only to Allied World for satisfaction of its claim for Merger Consideration and any dividends and distributions which such holder has the right to receive pursuant to this Article II.

          (g) No Liability. None of Allied World, Transatlantic, Merger Sub or the Exchange Agent shall be liable to any Person in respect of any portion of the Exchange Fund or the Merger Consideration delivered to a public official pursuant to any applicable abandoned property, escheat or similar Law. Notwithstanding any other provision of this Agreement, any portion of the Merger Consideration or the cash to be paid in accordance with this Article II that remains undistributed to the holders of Certificates and Book-Entry Shares as of the second anniversary of the Effective Time (or immediately prior to such earlier date on which the Merger Consideration or such cash would otherwise escheat to or become the property of any Governmental Entity), shall, to the extent permitted by applicable Law, become the property of the Surviving Corporation, free and clear of all claims or interest of any Person previously entitled thereto.

          (h) Investment of Exchange Fund. The Exchange Agent shall invest any cash in the Exchange Fund as directed by Allied World on a daily basis, provided that, subject to Section 2.2(g), no such investment or losses will affect the cash payable to holders of Certificates or Book-Entry Shares. Any interest or other amounts received with respect to such investments shall be paid to Allied World.

          (i) Withholding Rights. Each of Allied World and the Exchange Agent (without duplication) shall be entitled to deduct and withhold from the consideration otherwise payable to any holder of a Certificate or Book-Entry Share pursuant to this Agreement such amounts as may be required to be deducted and withheld with respect to the making of such payment under applicable Tax Law. Any amounts so deducted, withheld and paid over to the appropriate Taxing Authority shall be treated for all purposes of this Agreement as having been paid to the holder of the Certificate or Book-Entry Share in respect of which such deduction or withholding was made.

          (j) Lost Certificates. If any Certificate shall have been lost, stolen or destroyed, upon the making of an affidavit of that fact by the Person claiming such Certificate to be lost, stolen or destroyed and, if required by Allied World or the Exchange Agent, the posting by such Person of a bond in such amount as Allied World or the Exchange Agent may determine is reasonably necessary as indemnity against any claim that may be made against it or the Surviving Corporation with respect to such Certificate, the Exchange Agent (or, if subsequent to the termination of the Exchange Fund and subject to Section 2.2(g), Allied World) shall deliver, in exchange for such lost, stolen or destroyed Certificate, the Merger Consideration and any dividends and distributions deliverable in respect thereof pursuant to this Agreement.

     2.3 Transatlantic Stock Options and Other Equity Awards.

          (a) Prior to the Effective Time, the Board of Directors of Transatlantic (the “Transatlantic Board”) (or, if appropriate, the committee thereof administering the Transatlantic Stock Plans) shall adopt such resolutions or take such other actions as may be required to effect the following:

          (i) adjust the terms of all outstanding Transatlantic Stock Options to provide that, at the Effective Time, each Transatlantic Stock Option outstanding immediately prior to the Effective Time, whether vested or unvested, shall be deemed to constitute an option to acquire, on the same terms and conditions as were applicable under such Transatlantic Stock Option (including any vesting or forfeiture provisions or repurchase rights, but taking into account any acceleration thereof provided for in the relevant Transatlantic Stock Plan or in the related award document by reason of the transactions contemplated hereby), a number of Allied World Shares (rounded down to the nearest whole share) equal to the product of (x) the number of shares of Transatlantic Common Stock subject to such Transatlantic Stock Option multiplied by (y) the Exchange Ratio, at an exercise price per Allied World Share (rounded up to the nearest whole cent) equal to the quotient of (x) the exercise price per share of Transatlantic Common Stock subject to such Transatlantic Stock Option divided by (y) the Exchange Ratio (each, a “Transatlantic Rollover Option”); provided, however, that in the case of any option to which Section 421 of the Internal Revenue Code of 1986, as amended (the “Code”), applies by reason of its qualification under either Section 422 or 424 of the Code, the option price, the number of shares purchasable pursuant to such option and the terms and conditions of exercise of such option shall be determined in order to comply with Section 424(a) of the Code and such adjustment shall in all events comply with the requirements of Section 409A of the Code;

          (ii) adjust the terms of all outstanding Transatlantic Stock-Based Awards (other than Transatlantic Stock Options) to provide that, at the Effective Time, such Transatlantic Stock-Based Awards outstanding immediately prior to the Effective Time shall be converted into Allied World Shares or other compensatory awards denominated in Allied World Shares subject to a risk of forfeiture to, or right of repurchase by, Allied World (each, a “Converted Transatlantic Stock-Based Award”), with the same terms and conditions as were applicable under such Transatlantic Stock-Based Awards (including any vesting or forfeiture provisions or repurchase rights, but taking into account any acceleration thereof provided for in the relevant Transatlantic

Stock Plan or in the related award document by reason of the transactions contemplated hereby), and each holder of Transatlantic Stock-Based Awards shall be entitled to receive a number of Converted Transatlantic Stock-Based Awards equal to the product of (x) the number of Transatlantic Stock-Based Awards held by such holder immediately prior to the Effective Time and (y) the Exchange Ratio;

          (iii) adjust the performance goals for, or convert, all Converted Transatlantic Stock-Based Awards that vest based on the achievement of performance criteria in the manner agreed to by Transatlantic and Allied World within 15 Business Days following the date hereof (or such later time as may be agreed to by the parties) to appropriately reflect the Merger with respect to performance periods that have not ended prior to the Effective Time;

          (iv) make such other changes to the Transatlantic Stock Plans as it deems appropriate to give effect to the Merger (subject to the approval of Allied World, which shall not be unreasonably withheld, conditioned or delayed); and

          (v) ensure that, after the Effective Time, no Transatlantic Stock Options or Transatlantic Stock-Based Awards may be granted under any Transatlantic Stock Plans and that from and after the Effective Time awards under the Transatlantic Stock Plans shall be granted with respect to Allied World Shares.

          (b) At the Effective Time, and subject to compliance by Transatlantic with Section 2.3(a), Allied World shall assume all the obligations of Transatlantic under the Transatlantic Stock Plans, each outstanding Transatlantic Stock Option, each outstanding Transatlantic Stock-Based Award and the agreements evidencing the grants thereof. As soon as practicable after the Effective Time, Allied World shall deliver to the holders of outstanding Transatlantic Stock Options and Transatlantic Stock-Based Awards notices explaining the adjustments being made to such Transatlantic Stock Options and Transatlantic Stock-Based Awards in connection with the transactions contemplated by this Section 2.3, and the agreements evidencing the grants of such Transatlantic Stock Options and Transatlantic Stock-Based Awards shall continue in effect on the same terms and conditions (subject to the adjustments required by this Section 2.3 after giving effect to the Merger).

          (c) Allied World shall take all corporate action necessary to reserve for issuance a sufficient number of Allied World Shares for delivery upon exercise of the Transatlantic Rollover Options and Converted Transatlantic Stock-Based Awards assumed in accordance with this Section 2.3. As soon as reasonably practicable after the Effective Time, Allied World shall file a registration statement on Form S-8 (or any successor or other appropriate form) with respect to the Allied World Shares subject to such Transatlantic Rollover Options and Converted Transatlantic Stock-Based Awards and shall use its reasonable best efforts to maintain the effectiveness of such registration statement or registration statements (and maintain the current status of the prospectus or prospectuses contained therein) for so long as Allied World is subject to the reporting requirements pursuant to Section 13 or 15(d) of the Exchange Act and such Transatlantic Rollover Options and Converted Transatlantic Stock-Based Awards remain outstanding.

          2.4 Further Assurances. If, at any time before or after the Effective Time, Allied World or Transatlantic reasonably believes or is advised that any further instruments, deeds, assignments or assurances are reasonably necessary or desirable to consummate the Merger or to carry out the purposes and intent of this Agreement at or after the Effective Time, then Allied World, Merger Sub, Transatlantic, the Surviving Corporation and their respective officers and directors shall execute and deliver all such proper instruments, deeds, assignments or assurances and do all other things reasonably necessary or desirable to consummate the Merger and to carry out the purposes and intent of this Agreement.

ARTICLE III.
REPRESENTATIONS AND WARRANTIES OF ALLIED WORLD AND MERGER SUB

     Except as (x) disclosed in the Allied World SEC Documents filed with or furnished to the U.S. Securities and Exchange Commission (the “SEC”) at least one (1) Business Day prior to the date of this Agreement (excluding disclosure contained in the “risk factors” section or constituting “forward-looking statements,” in each case, to the extent such disclosure is cautionary, predictive or speculative in nature) or (y) set forth in the disclosure letter delivered by Allied World to Transatlantic on or prior to the date of this Agreement (the “Allied World Disclosure Schedule”), Allied World and Merger Sub, jointly and severally, represent and warrant to Transatlantic as set forth in this Article III. For purposes of the representations and warranties of Allied World and Merger Sub contained herein, disclosure in any section of the Allied World Disclosure Schedule of any facts or circumstances shall be deemed to be disclosure of such facts or circumstances with respect to all representations or warranties by Allied World to which the relevance of such disclosure to the applicable representation and warranty is reasonably apparent on the face thereof. The inclusion of any information in the Allied World Disclosure Schedule or other document delivered by Allied World pursuant to this Agreement shall not be deemed to be an admission or evidence of the materiality of such item, nor shall it establish a standard of materiality for any purpose whatsoever. For purposes of this Article III, references to “Allied World” that relate to a time period prior to December 1, 2010 shall, for the time period prior to December 1, 2010, refer to Allied World Assurance Company Holdings, Ltd, an exempted company incorporated in Bermuda (the “Prior Allied World Parent”) and its Subsidiaries.

     3.1 Corporate Organization.

          (a) Allied World.

          (i) Allied World (i) is a stock corporation duly organized, validly existing and in good standing under the laws of Switzerland, (ii) has all organizational powers and all material governmental licenses, authorizations, permits, consents and approvals required to carry on its business as now conducted and (iii) is duly qualified to do business as a foreign stock corporation in each jurisdiction where such qualification is necessary, except for such variances from the matters set forth in any of clauses (ii) or (iii) as would not, individually or in the aggregate, reasonably be expected to have an Allied World Material Adverse Effect.

          (ii) True and complete copies of the Articles of Association of Allied World, as amended through, and as in effect as of, the date of this Agreement (the “Allied World Articles”), and the Organizational Regulations of Allied World, as amended through, and as in effect as of, the date of this Agreement (the “Allied World Bylaws”), have previously been made available to Transatlantic.

          (iii) Each Allied World Subsidiary (i) is duly organized, validly existing and in good standing under the laws of its jurisdiction of organization, (ii) is duly licensed or qualified to do business in each jurisdiction in which the nature of the business conducted by it or the character or location of the properties and assets owned or leased by it makes such licensing or qualification necessary, and (iii) has all requisite corporate power and authority to own or lease its properties and assets and to carry on its business as now conducted, except for such variances from the matters set forth in any of clauses (i), (ii) or (iii) as would not, individually or in the aggregate, reasonably be expected to have an Allied World Material Adverse Effect.

          (b) Merger Sub.

          (i) True and complete copies of the certificate of formation and limited liability company operating agreement of Merger Sub, each as in effect as of the date of this Agreement, have previously been made available to Transatlantic.

          (ii) Merger Sub is a limited liability company duly organized, validly existing and in good standing under the laws of the State of Delaware. Except as contemplated by this Agreement, Merger Sub does not hold and has not held any material assets or incurred any material liabilities, and has not carried on any business activities other than in connection with the Merger and the other transactions contemplated by this Agreement. The sole issued and outstanding limited liability company interest of Merger Sub is duly issued, fully paid and nonassessable and is owned directly or indirectly by Allied World, free and clear of any liens, pledges, charges and security interests and similar encumbrances (“Liens”).

     3.2 Capitalization.

          (a) Authorized and Issued Shares.

          (i) As of the close of business on June 9, 2011 (the “Measurement Date”), the share capital of Allied World amounts to (A) CHF 568,483,965, divided into 37,898,931 fully paid-in Allied World Shares in accordance with Articles 3a of the Allied World Articles plus (B) CHF 28,535,565, divided into 1,902,371 fully paid-in Allied World Shares in accordance with Articles 3a of the Allied World Articles that were held as treasury shares. In addition to the issued and paid up share capital, as of the Measurement Date, there exists (i) an authorized share capital of CHF 119,403,900, divided into 7,960,260 Allied World Shares, allowing the Board of Directors of Allied World (the “Allied World Board”) to issue additional Allied World Shares without the approval of Allied World’s shareholders in accordance with Article 6 of the Allied World Articles, (ii) a conditional capital of CHF 15,000,000, divided into 1,000,000 Allied

World Shares, payable in full, that can be issued by Allied World from time to time in connection with the exercise of conversion and/or option or warrant rights granted in connection with bonds, notes or similar instruments, issued or to be issued by Allied World or its Subsidiaries, including convertible debt instruments in accordance with Article 4 of the Allied World Articles, (iii) a conditional capital of CHF 63,000,000, divided into 4,200,000 Allied World Shares that can be issued by Allied World from time to time in connection with the exercise of option rights granted to any employee of Allied World or of an Allied World Subsidiary, any consultant, director or other person providing services to Allied World or an Allied World Subsidiary in accordance with Article 5 of the Allied World Articles and (iv) a conditional capital of CHF 30,000,000, divided into 2,000,000 Allied World Shares, payable in full, that can be issued by Allied World in connection with the exercise of shareholder warrants granted to American International Group, Inc. in accordance with Article 5a of the Allied World Articles. Section 3.2 of the Allied World Disclosure Schedule contains a complete and correct list, as of the Measurement Date, of each outstanding Allied World Stock Option and Allied World RSU, including, as applicable, the holder, date of grant, exercise price (to the extent applicable), vesting schedule and number of Allied World Shares subject thereto and each Allied World Stock Plan.

          (ii) As of the Measurement Date, the participation capital of Allied World amounts to CHF 3,035,100 and is divided into 202,340 fully paid-in participation certificates with a par value of CHF 15.00 per participation certificate (a “Participation Certificate”) in accordance with Article 3b of the Allied World Articles.

          (iii) As of the date of this Agreement, except for this Agreement, Allied World Stock Options and Allied World RSUs, there are not issued, reserved for issuance or outstanding, and there are not any outstanding obligations of Allied World or any Allied World Subsidiary to issue, deliver or sell, or cause to be issued, delivered or sold, any Equity Equivalents of Allied World or any Allied World Subsidiary. Except for Forfeitures and Cashless Settlements in connection with the Allied World Stock Options and Allied World Stock-Based Awards, there are not any outstanding obligations of Allied World or any of the Allied World Subsidiaries to directly or indirectly redeem, repurchase or otherwise acquire any shares of capital stock or voting securities of, other equity interests in or Equity Equivalents of Allied World or any Allied World Subsidiary. Neither Allied World nor any of the Allied World Subsidiaries is party to any voting agreement with respect to the voting of any capital stock or voting securities of, or other equity interests in, Allied World. All outstanding shares of capital stock of Allied World have been, and all shares that may be issued pursuant to any employee stock option or other compensation plan or arrangement or warrant will be, when issued in accordance with the respective terms thereof, duly authorized and validly issued and fully paid. Except with respect to the Share Issuance and as set forth in the Allied World Articles, the consummation of the Merger and the other transactions contemplated hereby or taken in contemplation of this Agreement will not, as of the Effective Time, trigger any preemptive rights of any Person with respect to the capital stock of Allied World, whether by law or otherwise. As of the date on which the Allied World Shares to be issued under the Share Issuance will be issued, the preferential subscription rights of Allied World’s shareholders will have been validly withdrawn and the Allied World

Shares to be issued under the Share Issuance will have been validly issued in accordance with the Allied World Articles and Swiss Law, subject only to the Allied World Share Issuance Stockholder Approval. With respect to the Allied World Stock Options, (A) each grant of an Allied World Stock Option was duly authorized no later than the date on which the grant of such Allied World Stock Option was by its terms to be effective (the “Grant Date”) by all necessary corporate action, including, as applicable, approval by the Allied World Board, or a committee thereof, or a duly authorized delegate thereof, and any required approval by the shareholders of Allied World by the necessary number of votes or written consents, and the award agreement governing such grant, if any, was duly executed and delivered by each party thereto within a reasonable time following the Grant Date, (B) each such grant was made in accordance with the terms of the applicable Allied World Stock Plan, the Exchange Act and all other applicable Law, including the rules of the NYSE, (C) the per share exercise price of each Allied World Stock Option was not less than the fair market value of an Allied World Share on the applicable Grant Date, (D) each such grant was properly accounted for in all material respects in accordance with GAAP in the financial statements (including the related notes) of Allied World and disclosed in Allied World’s filings with the SEC in accordance with the Exchange Act and all other applicable Laws, and (E) no amendments, modifications or other changes have been made to any such grants after the Grant Date.

          (b) As of the date of this Agreement, no bonds, debentures, notes or other indebtedness of Allied World having the right to vote on any matters on which stockholders may vote are issued or outstanding.

          (c) All of the issued and outstanding shares of capital stock or other equity ownership interests of each “significant subsidiary” (as such term is defined under Regulation S-X promulgated by the SEC) of Allied World and of each Allied World P/C Subsidiary are owned by Allied World, directly or indirectly, free and clear of any material Liens other than Permitted Liens, and free of any restriction on the right to vote, sell or otherwise dispose of such capital stock or other equity ownership interest (other than restrictions under applicable securities Laws), and all of such shares or equity ownership interests are duly authorized and validly issued and are fully paid, nonassessable and free of preemptive rights. Except for the capital stock or other equity ownership interests of the Allied World Subsidiaries, as of the date of this Agreement, Allied World does not beneficially own, directly or indirectly, any capital stock, membership interest, partnership interest, joint venture interest or other equity interest in any Person. As used in this Agreement, (i) “Subsidiary,” when used with respect to either party, means any corporation, partnership, limited liability company or other organization, whether incorporated or unincorporated, (A) of which such party or any other Subsidiary of such party is a general partner (excluding partnerships, the general partnership interests of which held by such party or any Subsidiary of such party do not have a majority of the voting interests in such partnership) or (B) a majority of the securities or other interests of which having by their terms ordinary voting power to elect a majority of the Board of Directors or others performing similar functions with respect to such corporation or other organization is directly or indirectly owned or controlled by such party or by any one or more of its Subsidiaries, or by such party and one or more of its Subsidiaries, (ii) the term “Subsidiaries” means more than one such Subsidiary, and (iii) the terms “Allied World Subsidiary” and “Transatlantic Subsidiary” will mean any direct or indirect Subsidiary of Allied World or Transatlantic, respectively.

     3.3 Corporate Authorization.

               (a) Allied World has all necessary corporate power and authority to execute and deliver this Agreement, to perform its obligations hereunder and to consummate the transactions to which it is a party contemplated hereby subject to obtaining the Allied World Requisite Stockholder Vote. The execution, delivery and performance by Allied World of this Agreement and the consummation by Allied World of the transactions to which it is a party contemplated hereby have been duly and validly authorized and approved by the Allied World Board. The Allied World Board has, by resolutions duly adopted, unanimously determined that this Agreement and the transactions contemplated hereby are in the best interests of Allied World and its stockholders, has approved and adopted this Agreement and the plan of merger herein providing for the Merger, upon the terms and subject to the conditions set forth herein, approved the execution, delivery and performance by Allied World of this Agreement and the consummation of the transactions to which it is a party contemplated hereby, upon the terms and subject to the conditions set forth herein and resolved, subject to Section 5.5, to recommend approval of each of the matters constituting the Allied World Requisite Stockholder Vote by the stockholders of Allied World (such recommendation, the “Allied World Board Recommendation”) and that such matters and recommendation be submitted for consideration at a duly held meeting of the stockholders of Allied World for a vote for such purposes (the “Allied World Stockholders Meeting”). Except (i) solely in the case of the Allied World Articles Amendment, for the adoption of the Allied World Articles Amendment at a meeting where holders of at least 50% of the total outstanding Allied World Shares are represented and voting, the affirmative vote of 50% of the holders of the Allied World Shares voting at such meeting entitled to vote on such adoption (the “Allied World Articles Amendment Stockholder Approval”) and (ii) solely in the case of the Share Issuance, (A) for approval of the Share Issuance, including the exclusion of all preferential subscription rights to which holders of Allied World Shares may be entitled as a result of the transactions contemplated hereby, at a meeting where holders of at least 50% of the total outstanding Allied World Shares are represented and voting, the affirmative vote of holders representing at least two-thirds of the Allied World Shares voting at such meeting entitled to vote on such issuance (the “Allied World Share Issuance Stockholder Approval” and, together with the Allied World Articles Amendment Stockholder Approval, the “Allied World Requisite Stockholder Vote”) and (B) for a resolution of the Allied World Board for the ascertainment of the Share Issuance, no other corporate proceedings on the part of Allied World or any other vote by the holders of any class or series of capital stock of Allied World are necessary to approve or adopt this Agreement or to consummate the transactions contemplated hereby (except for the filing of the Certificate of Merger and the Restated Articles, as required by applicable Law).

               (b) This Agreement has been duly executed and delivered by Allied World and, assuming due power and authority of, and due execution and delivery by, the other parties hereto, constitutes a valid and binding obligation of Allied World, enforceable against Allied World in accordance with its terms, subject to bankruptcy, insolvency, fraudulent transfer, moratorium, reorganization or similar Laws affecting the rights of creditors generally and the availability of equitable remedies (regardless of whether such enforceability is considered in a proceeding in equity or at law) (together, the “Bankruptcy and Equity Exception”).

          (c) Merger Sub has all necessary limited liability company power and authority to execute and deliver this Agreement, to perform its obligations hereunder and to consummate the transactions to which it is a party contemplated hereby. The execution, delivery and performance by Merger Sub of this Agreement and the consummation by Merger Sub of the transactions to which it is a party contemplated hereby have been duly and validly authorized and approved by the sole member of Merger Sub. The sole member of Merger Sub has determined that this Agreement and the transactions contemplated hereby are in the best interests of Merger Sub and its sole member and has approved this Agreement. No other limited liability company proceeding on the part of Merger Sub is necessary to approve or adopt this Agreement or to consummate the transactions contemplated hereby (except for the filing of the Certificate of Merger and the Restated Articles, as required by applicable Law). This Agreement has been duly executed and delivered by Merger Sub and, assuming due power and authority of, and due execution and delivery by, the other parties hereto, constitutes a valid and binding obligation of Merger Sub, enforceable against Merger Sub in accordance with its terms, subject to the Bankruptcy and Equity Exception.

          3.4 Governmental Authorization. The execution, delivery and performance by each of Allied World and Merger Sub of this Agreement and the consummation by each of Allied World and Merger Sub of the transactions to which it is a party contemplated hereby require at or prior to the Closing no consent or approval by, or filing with, or notification to any Governmental Entity, other than (a) the filing of the Certificate of Merger with the Secretary of State of the State of Delaware and appropriate documents with the relevant authorities of other states in which Allied World is qualified to do business, (b) the filing of the Restated Articles with the appropriate Swiss Governmental Entities, (c) compliance with any applicable requirements of the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the “HSR Act”) and any other Antitrust Law, (d) compliance with any applicable requirements of the Securities Act, the Exchange Act, any other applicable U.S. federal or state securities Laws or “blue sky” Laws, and any foreign securities Laws, (e) compliance with any applicable requirements of the NYSE, (f) approvals or filings under all applicable Insurance Laws as set forth in Section 3.4 of the Allied World Disclosure Schedule (the “Allied World Insurance Approvals”), (g) the Transatlantic Insurance Approvals (assuming the accuracy and completeness of Section 4.4(f)), (h) those consents, approvals or filings as may be required as a result of the business or identity of Transatlantic or any of its Affiliates (assuming the accuracy and completeness of Section 4.4(f)) and (i) any other consents, approvals or filings the failure of which to be obtained or made would not, individually or in the aggregate, reasonably be expected to have an Allied World Material Adverse Effect or prevent or materially delay the consummation of the transactions contemplated by this Agreement.

          3.5 Non-Contravention. The execution, delivery and performance by each of Allied World and Merger Sub of this Agreement do not, and the consummation of the transactions to which it is a party contemplated hereby will not, (a) assuming (solely in the case of the Allied World Articles Amendment and the Share Issuance) that the Allied World Requisite Stockholder Vote is obtained, violate or conflict with or result in any breach of any provision of the Organizational Documents of Allied World or any of its Subsidiaries; (b) assuming receipt of the Allied World Requisite Stockholder Vote and compliance with the matters referred to in Section 3.4 and Section 4.4 (and assuming the accuracy and

completeness of Section 4.4(f)), violate or conflict with any provision of any applicable Law; (c) violate or conflict with or result in any breach or constitute a default, or an event that, with or without notice or lapse of time or both, would constitute a default under, or cause the termination, cancellation, acceleration or other change of any right or obligation or the loss of any benefit to which Allied World or any of its Subsidiaries is entitled, or require consent by any Person under, any loan or credit agreement, note, mortgage, indenture, lease, Allied World Benefit Plan, or Allied World Material Contract; or (d) subject to the receipt of the Transatlantic Insurance Approvals (and assuming the accuracy and completeness of Section 4.4(f)), result in the creation or imposition of any Lien (other than Permitted Liens) on any asset of Allied World or any of its Subsidiaries, except in the case of clause (b), (c) or (d), as would not, individually or in the aggregate, reasonably be expected to have an Allied World Material Adverse Effect or prevent or materially delay the consummation of the transactions contemplated by this Agreement.

     3.6 Allied World SEC Filings, Etc.

               (a) Allied World has timely filed all reports, schedules, forms, registration statements and other documents required to be filed by Allied World with the SEC since January 1, 2008 (together with any documents furnished during such period by Allied World to the SEC on a voluntary basis on Current Reports on Form 8-K and any reports, schedules, forms, registration statements and other documents filed with the SEC subsequent to the date hereof, collectively, the “Allied World SEC Documents”). Each of the Allied World SEC Documents, as amended prior to the date of this Agreement, complied (and each Allied World SEC Document filed subsequent to the date hereof will comply) in all material respects with, to the extent in effect at the time of filing or furnishing, the requirements of the Securities Act and the Exchange Act applicable to such Allied World SEC Documents, and none of the Allied World SEC Documents when filed or furnished or, if amended prior to the date of this Agreement, as of the date of such amendment, contained, or with respect to Allied World SEC Documents filed subsequent to the date hereof, will contain, any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading. To the knowledge of Allied World, there are no material unresolved comments received from the SEC staff with respect to the Allied World SEC Documents on or prior to the date hereof. To the knowledge of Allied World, none of the Allied World SEC Documents filed on or prior to the date hereof is subject to ongoing SEC review or investigation.

               (b) Allied World maintains a system of internal control over financial reporting (within the meaning of Rules 13a-15(f) and 15d-15(f) of the Exchange Act) sufficient to provide reasonable assurances regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP. Allied World (i) maintains disclosure controls and procedures (within the meaning of Rules 13a-15(e) and 15d-15(e) of the Exchange Act) designed to ensure that information required to be disclosed by Allied World in the reports that it files and submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, including that information required to be disclosed by Allied World in the reports that it files and submits under the Exchange Act is accumulated and communicated to management of Allied World, as appropriate, to allow timely decisions regarding required disclosure, and (ii) has

disclosed, based upon the most recent (prior to the date of this Agreement) evaluation by the chief executive officer and chief financial officer of Allied World of Allied World’s internal control over financial reporting, to its auditors and the audit committee of the Allied World Board (A) all significant deficiencies and material weaknesses in the design or operation of Allied World’s internal control over financial reporting which are reasonably likely to adversely affect in any material respect its ability to record, process, summarize and report financial data and (B) any fraud, whether or not material, that involves management or other employees who have a significant role in Allied World’s internal control over financial reporting. Allied World has made available to Transatlantic true and complete copies of any such disclosure contemplated by clauses (A) and (B) made by management to Allied World’s independent auditors and the audit committee of the Allied World Board since January 1, 2008.

          (c) Neither Allied World nor any of its Subsidiaries is a party to, or has any commitment to become a party to, any joint venture, off-balance sheet partnership or any similar Contract (including any Contract relating to any transaction or relationship between or among Allied World and any of its Subsidiaries, on the one hand, and any unconsolidated Affiliate, including any structured finance, special purpose or limited purpose entity, on the other hand, or any “off-balance sheet arrangement” (as defined in Item 303(a) of Regulation S-K promulgated by the SEC)), where the result, purpose or intended effect of such Contract is to avoid disclosure of any material transaction involving, or material liabilities of, Allied World or any of its Subsidiaries in the Allied World SEC Documents.

          (d) Allied World is in compliance in all material respects with (i) the provisions of the Sarbanes-Oxley Act of 2002, as amended (“SOX”) and (ii) the rules and regulations of the NYSE, in each case, that are applicable to Allied World.

          (e) Neither Allied World nor any Allied World Subsidiary, nor, to the knowledge of Allied World, any director, officer, agent, employee or Affiliate of Allied World or any Allied World Subsidiary is aware of any action, or any allegation made by any Governmental Entity of any action, or has taken any action, directly or indirectly, (i) that would constitute a violation by such Persons of the Foreign Corrupt Practices Act of 1977, as amended, and the rules and regulations thereunder (the “FCPA”), including making use of the mails or any means or instrumentality of interstate commerce corruptly in furtherance of an offer, payment, promise to pay or authorization of the payment of any money, or other property, gift, promise to give, or authorization of the giving of anything of value to any “foreign official” (as such term is defined in the FCPA) or any foreign political party or official thereof or any candidate for foreign political office, in contravention of the FCPA, or (ii) that would constitute an offer to pay, a promise to pay or a payment of money or anything else of value, or an authorization of such offer, promise or payment, directly or indirectly, to any employee, agent or representative of another company or entity in the course of their business dealings with Allied World or any Allied World Subsidiary, in order to unlawfully induce such person to act against the interest of his or her employer or principal. There is no current, pending, or, to the knowledge of Allied World, threatened charges, proceedings, investigations, audits, or complaints against Allied World or any Allied World Subsidiary or, to the knowledge of Allied World, any director, officer, agent, employee or Affiliate of Allied World with respect to the FCPA or any other anti-corruption Law or regulation.

          3.7 Allied World Financial Statements. The consolidated financial statements (including all related notes thereto) of Allied World included in the Allied World SEC Documents (if amended, as of the date of the last such amendment filed prior to the date of this Agreement) fairly present in all material respects the consolidated financial position of Allied World and its consolidated Subsidiaries, as at the respective dates thereof, and the consolidated results of their operations, the changes in stockholder’s equity and their consolidated cash flows for the respective periods then ended (subject, in the case of the unaudited statements, to normal year-end audit adjustments and to the absence of information or notes not required by GAAP to be included in interim financial statements) and were prepared, in all material respects, in accordance with, and complied, in all material respects, with GAAP during the periods involved (except, in the case of the unaudited statements, as permitted by the SEC) applied on a consistent basis (except as may be indicated therein or in the notes thereto).

          3.8 Form S-4. The information supplied or to be supplied by Allied World or Merger Sub specifically for inclusion in the registration statement on Form S-4 to be filed by Allied World in connection with the Share Issuance (the “Form S-4”) shall not, at the time that the Form S-4 is declared effective by the SEC, contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading, except that no representation or warranty is made by Allied World or Merger Sub with respect to statements made therein based on information supplied by or on behalf of Transatlantic specifically for inclusion in the Form S-4. The Joint Proxy Statement/Prospectus will not, at the date the Joint Proxy Statement/Prospectus is first mailed to the stockholders of Allied World and at the time of the Allied World Stockholders Meeting, contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading, except that, in each case, no representation or warranty is made by Allied World or Merger Sub with respect to statements made therein based on information supplied by or on behalf of Transatlantic specifically for inclusion in the Joint Proxy Statement/Prospectus.

     3.9 Absence of Certain Changes or Events.

               (a) Since December 31, 2010, no event or events or development or developments have occurred that have had or would reasonably be expected to have, individually or in the aggregate, an Allied World Material Adverse Effect.

               (b) Except in connection with the execution and delivery of this Agreement and the transactions contemplated by this Agreement, from December 31, 2010 through the date of this Agreement, Allied World and the Allied World Subsidiaries have carried on their respective businesses in all material respects in the ordinary course of business consistent with past practice.

          3.10 No Undisclosed Material Liabilities. There are no material liabilities or obligations of Allied World or any of its Subsidiaries of any nature, whether accrued, contingent, absolute, determined, determinable or otherwise, whether or not required by

GAAP to be reflected on a consolidated balance sheet of Allied World and its Subsidiaries other than: (a) liabilities or obligations reflected or reserved against in Allied World’s consolidated balance sheet as of March 31, 2011 included in the Allied World SEC Documents or in the notes thereto and (b) liabilities or obligations that were incurred since March 31, 2011 in the ordinary course of business consistent with past practice.

     3.11 Compliance with Laws.

               (a) Since January 1, 2008, (i) the business and operations of Allied World and its Subsidiaries have been conducted in compliance with all applicable Laws (including Insurance Laws) and (ii) Allied World has complied with the applicable listing and corporate governance rules and regulations of the NYSE except, in each case, where the failure to so conduct such business and operations or comply with such rules and regulations would not, individually or in the aggregate, reasonably be expected to have an Allied World Material Adverse Effect, or prevent or materially delay the consummation of the transactions contemplated by this Agreement.

               (b) All of the Allied World Permits of each Allied World P/C Subsidiary conducting insurance operations are in full force and effect in accordance with their terms and there is no proceeding or investigation to which Allied World or any Allied World Subsidiary is subject before a Governmental Entity that is pending or threatened in writing that would reasonably be expected to result in the revocation, failure to renew or suspension of, or placement of a restriction on, any such Allied World Permits, except where the failure to be in full force and effect in accordance with their terms, revocation, failure to renew, suspension or restriction would not, individually or in the aggregate, reasonably be expected to have an Allied World Material Adverse Effect, or prevent or materially delay the consummation of the transactions contemplated by this Agreement.

               (c) There is no proceeding to which Allied World or any Allied World Subsidiary is subject before any Governmental Entity pending or threatened in writing regarding whether any of the Allied World Subsidiaries has violated any applicable Laws (including Insurance Laws), nor, any investigation by any Governmental Entity pending or threatened in writing with respect to possible violations of any applicable Laws, which, if determined or resolved adversely against Allied World or any Allied World Subsidiary, would, individually or in the aggregate, reasonably be expected to be material to Allied World and its Subsidiaries, taken as a whole, or would reasonably be expected to prevent or materially delay the consummation of the transactions contemplated by this Agreement. Since January 1, 2008, each Allied World P/C Subsidiary has timely filed all material reports, registrations, statements and certifications, together with any amendments required to be made with respect thereto, required to be filed by it with any applicable Insurance Regulator or such failure to file has been remedied.

          3.12 Litigation. There is no action, suit, investigation, claim, complaint, demand, summons, cease and desist letter, subpoena, Injunction, notice of violation or other proceeding pending against or threatened in writing against Allied World, Merger Sub or any of their respective Subsidiaries or pending against or threatened in writing against any present or former officer, director or employee of Allied World or any Allied World

Subsidiary in connection with which Allied World or any Allied World Subsidiary has an indemnification obligation, before any Governmental Entity (other than insurance and reinsurance claims litigation or arbitration arising in the ordinary course of business), which, if determined or resolved adversely in accordance with the plaintiff’s or claimant’s demands, would, individually or in the aggregate, reasonably be expected to be material to Allied World and its Subsidiaries, taken as a whole, or would reasonably be expected to prevent or materially delay the consummation of the transactions contemplated hereby. There is no Order outstanding against Allied World or any of its Subsidiaries which would, individually or in the aggregate, reasonably be expected to be material to Allied World and its Subsidiaries, taken as a whole, or would reasonably be expected to prevent or materially delay the consummation of the transactions contemplated hereby.

          3.13 Title to Properties; Absence of Liens. Section 3.13 of the Allied World Disclosure Schedule sets forth a true and complete description (including address, and for each lease, sublease and license, and all amendments, extensions, renewals, guaranties, modifications, supplements or other agreements, if any, with respect thereto) of all real property leased, subleased or licensed by Allied World or any of its Subsidiaries (collectively, the “Allied World Leased Real Properties”; and the leases, subleases and licenses with respect thereto, collectively, the “Allied World Real Property Leases”). Allied World has delivered or otherwise made available to Transatlantic true, correct and complete copies of the Allied World Real Property Leases, together with all amendments, extensions, renewals, guaranties, modifications, supplements or other agreements, if any, with respect thereto. Each of the Allied World Real Property Leases is in full force and effect. Allied World or one of its Subsidiaries has a valid, binding and enforceable leasehold or subleasehold interest (or license, as applicable) in each Allied World Leased Real Property, in each case as to such leasehold or subleasehold interest (or license, as applicable), free and clear of all Liens (other than Permitted Liens). Neither Allied World nor any of its Subsidiaries owns any real property or any interests in real property.

          3.14 Opinion of Financial Advisor. The Allied World Board has received an opinion from Deutsche Bank Securities Inc. (“DB”), dated as of the date of this Agreement and addressed to the Allied World Board to the effect that, as of the date hereof and based upon and subject to the limitations, qualifications and assumptions set forth therein, the Exchange Ratio is fair, from a financial point of view, to Allied World. Allied World has been authorized by DB to include such opinion in its entirety in the Joint Proxy Statement/Prospectus.

     3.15 Taxes.

               (a) All material Tax Returns required by applicable Law to be filed with any Taxing Authority by, or on behalf of, Allied World or any of its Subsidiaries have been duly filed when due (including extensions) in accordance with all applicable Laws, and all such Tax Returns are true, correct and complete in all material respects.

               (b) Allied World and each of its Subsidiaries has duly and timely paid or has duly and timely withheld and remitted to the appropriate Taxing Authority all material Taxes due and payable, or, where payment is not yet due, has established in accordance with the applicable

accounting standard an adequate accrual for all material Taxes on the most recent financial statements contained in the Allied World SEC Documents and on the Allied World Statutory Statements.

          (c) There is no claim, audit, action, suit, request for written ruling, proceeding or investigation pending or threatened in writing against or with respect to Allied World or any of its Subsidiaries in respect of any Tax or Tax Return which (except in the case of a request for a written ruling) if determined adversely would, individually or in the aggregate, be expected to result in a material Tax deficiency.

          (d) Allied World and each of its Subsidiaries has withheld all material amounts required to have been withheld by it in connection with amounts paid or owed to any employee, independent contractor, creditor, shareholder or any other third party; such withheld amounts were either duly paid to the appropriate Taxing Authority or set aside in accounts for such purpose. Allied World and each of its Subsidiaries has reported such withheld amounts to the appropriate Taxing Authority and to each such employee, independent contractor, creditor, shareholder or any other third party, as required under applicable Law.

          (e) Neither Allied World nor any of its Subsidiaries is liable for any Taxes of any Person (other than Allied World and its Subsidiaries) as a result of being (i) a transferee or successor of such Person, (ii) a member of an affiliated, consolidated, combined or unitary group that includes such Person as a member or (iii) a party to a tax sharing, tax indemnity or tax allocation agreement or any other agreement to indemnify such Person.

          (f) Neither Allied World nor any of its Subsidiaries shall be required to include any item of income in, or exclude any item of deduction from, taxable income for any period (or portion thereof) ending after the Closing Date, as a result of (1) any change in method of accounting for a taxable period ending on or prior to the Closing Date under Section 481 of the Code (or any corresponding provision of state, local or foreign Law), (2) “closing agreement” as described in Section 7121 of the Code (or any corresponding or similar provision of state, local or foreign Tax Law) executed on or prior to the Closing Date, (3) intercompany transaction or excess loss account described in Treasury Regulations under Section 1502 of the Code (or any corresponding or similar provision of state, local or foreign Tax Law), (4) installment sale or open transaction made on or prior to the Closing Date, or (5) prepaid amount received on or prior to the Closing Date.

          (g) Neither Allied World nor any of its Subsidiaries has participated or engaged in any “reportable transaction” within the meaning of Treasury Regulations Section 1.6011-4 (or any corresponding or similar provision of state, local or foreign Tax Law). Neither Allied World nor any of its Subsidiaries is a party to any understanding or arrangement described in Section 6662(d)(2)(C)(ii) of the Code or Treasury Regulations Section 1.6011-4(b) or is a material advisor as defined in Section 6111(b) of the Code.

          (h) Neither Allied World nor any of its Subsidiaries has been informed by any Taxing Authority in any jurisdiction in which it does not file a Tax Return that it may be required to file a Tax Return in such jurisdiction.

               (i) Neither Allied World nor any of its Subsidiaries has distributed stock of another corporation, or has had its stock distributed by another corporation, in a transaction that was governed, or purported or intended to be governed or described, in whole or in part, by Section 355 or Section 368(a)(1)(D) of the Code.

     3.16 Employee Benefit Plans.

               (a) Section 3.16(a) of the Allied World Disclosure Schedule sets forth as of the date of this Agreement a true and complete list of each material “employee benefit plan” (within the meaning of Section 3(3) of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”)), multiemployer plans within the meaning of ERISA Section 3(37), and all material stock purchase, stock option, severance, employment, change-in-control, fringe benefit, bonus, incentive, deferred compensation and all other employee benefit plans, agreements, programs, policies or other arrangements, whether or not subject to ERISA (including any funding mechanism therefor now in effect or required in the future as a result of the transactions contemplated by this Agreement or otherwise), whether formal or informal, written, legally binding or not, under which any employee or former employee of Allied World or its Subsidiaries has any present or future right to benefits or Allied World or its Subsidiaries has had or has any present or future liability (each, an “Allied World Benefit Plan”). With respect to each such Allied World Benefit Plan, Allied World has made available to Transatlantic a true and complete copy of such Allied World Benefit Plan, if written, or a description of the material terms of such Allied World Benefit Plan if not written, and to the extent applicable, (i) all trust agreements, Insurance Contracts or other funding arrangements; (ii) the most recent actuarial and trust reports for both ERISA funding and financial statement purposes; (iii) the most recent Form 5500 with all attachments required to have been filed with the Internal Revenue Service (the “IRS”) or the Department of Labor or any similar reports filed with any comparable Governmental Entity in any non-U.S. jurisdiction having jurisdiction over any Allied World Benefit Plan and all schedules thereto; (iv) the most recent IRS determination or opinion letter; and (v) all current summary plan descriptions.

               (b) (i) Each Allied World Benefit Plan has been maintained in all material respects in accordance with its terms and the requirements of applicable Law, (ii) each of Allied World and its Subsidiaries has performed all material obligations required to be performed by it under any Allied World Benefit Plan and, to the knowledge of Allied World, is not in any material respect in default under or in violation of any Allied World Benefit Plan and (iii) no action (other than claims for benefits in the ordinary course) is pending or threatened in writing with respect to any Allied World Benefit Plan by any current or former employee, officer or director of Allied World or any of its Subsidiaries that would reasonably be expected to have an Allied World Material Adverse Effect.

               (c) Each Allied World Benefit Plan that is intended to be qualified under Section 401(a) of the Code has received a determination or opinion letter from the IRS that it is so qualified and each related trust that is intended to be exempt from federal income taxation under Section 501(a) of the Code has received a determination or opinion letter from the IRS that it is so exempt and, to the knowledge of Allied World, no fact or event has occurred since the date of such letter or letters from the IRS that would reasonably be expected to adversely affect the qualified status of any such Allied World Benefit Plan or the exempt status of any such trust.

          (d) No liability under Subtitle C or D of Title IV of ERISA has been or is reasonably expected to be incurred by Allied World or any of its Subsidiaries with respect to any ongoing, frozen or terminated “single-employer plan,” within the meaning of Section 4001(a)(15) of ERISA, currently or formerly maintained by any of them, or the single-employer plan of any entity which is considered one employer with Allied World under Section 4001 of ERISA or Section 414 of the Code (an “Allied World ERISA Affiliate”). Allied World and its Subsidiaries have no liability (contingent or direct) with respect to any multiemployer plan under Subtitle E of Title IV of ERISA (regardless of whether based on contributions of an Allied World ERISA Affiliate) and no such liability is reasonably expected to be incurred by Allied World or its Subsidiaries. No notices have been required to be sent to participants and beneficiaries or to the Pension Benefit Guaranty Corporation (the “PBGC”) under Section 302 of ERISA or Section 412 or Section 430 of the Code.

          (e) All material contributions required to be made under each Allied World Benefit Plan, as of the date hereof, have been timely made. Neither any Allied World Benefit Plan nor any single-employer plan of an Allied World ERISA Affiliate has failed to satisfy the minimum funding standard within the meaning of Section 412 of the Code or Section 302 of ERISA. It is not reasonably anticipated that any Allied World Benefit Plan is, or is expected to be, in “at-risk” status (as defined in Section 430 of the Code or Section 303 of ERISA). Allied World has no liability pursuant to Section 4069 of ERISA.

          (f) Neither Allied World nor any of its Subsidiaries has any material liability in respect of post-retirement health, medical or life insurance benefits for retired, former or current employees of Allied World or its Subsidiaries, except as required by applicable Law. Allied World has reserved the right to amend, terminate or modify at any time all Allied World Benefit Plans providing for retiree health or life insurance coverage or other retiree death benefits, and there have been no communications to employees or former employees which could reasonably be interpreted to promise or guarantee such employees or former employees retiree health or life insurance or other retiree death benefits on a permanent basis.

          (g) Any arrangement of Allied World or any of its Subsidiaries that is subject to Section 409A of the Code was administered in reasonable, good faith compliance with the requirements of Section 409A through December 31, 2008, and all arrangements of Allied World or any of its Subsidiaries that are subject to Section 409A, provide for payment after December 31, 2008 and were in existence on such date have been amended to comply with the requirements of the final regulations under Section 409A, in each case except as would not, individually or in the aggregate, reasonably be expected to have an Allied World Material Adverse Effect. Neither Allied World nor any of its Subsidiaries has any obligation to provide any gross-up payment to any individual with respect to any income Tax, additional Tax, excise Tax or interest charge imposed pursuant to Section 409A or 4999 of the Code.

          (h) Except as set forth in Section 3.16(h) of the Allied World Disclosure Schedule, the consummation of the transactions contemplated hereby to which each of Allied World and Merger Sub is a party, will not, either alone or in combination with another event, (i) entitle any current or former director, officer or employee of Allied World or of any of its Subsidiaries to severance pay, unemployment compensation or any other payment; (ii) result in any payment becoming due, accelerate the time of payment or vesting, or increase the amount of

compensation due to any such director, officer or employee; (iii) result in any forgiveness of indebtedness, trigger any funding obligation under any Allied World Benefit Plan or impose any restrictions or limitations on Allied World’s rights to administer, amend or terminate any Allied World Benefit Plan; or (iv) result in any payment (whether in cash or property or the vesting of property) to any “disqualified individual” (as such term is defined in Treasury Regulations Section 1.280G-1) that could reasonably be expected, individually or in combination with any other such payment, to constitute an “excess parachute payment” (as defined in Section 280G(b)(1) of the Code).

     3.17 Employees, Labor Matters.

               (a) Neither Allied World nor any of its Subsidiaries is a party to or bound by any collective bargaining agreement, and there are no labor unions or other organizations representing, purporting to represent or, to the knowledge of Allied World, attempting to represent any employees of Allied World or any of its Subsidiaries in their capacity as such.

               (b) Since January 1, 2008, there has not occurred or been threatened in writing any material strike, slowdown, work stoppage, concerted refusal to work overtime or other similar labor activity or union organizing campaign with respect to any employees of Allied World or any of its Subsidiaries. There are no labor disputes subject to any formal grievance procedure, arbitration or litigation and there is no representation petition pending or threatened in writing with respect to any employee of Allied World or any of its Subsidiaries.

               (c) Allied World and its Subsidiaries have been in compliance with all applicable Laws relating to employment of labor, including all applicable Laws relating to wages, hours, collective bargaining, employment discrimination, civil rights, safety and health, workers’ compensation, pay equity, classification of employees, and the collection and payment of withholding and/or social security Taxes, except where noncompliance would not reasonably be expected to result in an Allied World Material Adverse Effect.

          3.18 Environmental Matters. Except as would not, individually or in the aggregate, reasonably be expected to have an Allied World Material Adverse Effect, (a) neither Allied World nor any of its Subsidiaries has received any written notice, demand, request for information, citation, summons or Order, and no complaint has been filed, no penalty has been assessed, no liability has been incurred, and no investigation, action, written claim, suit or proceeding is pending or is threatened in writing by any Governmental Entity or other Person with respect to or arising out of any applicable Environmental Law; and (b) no “release” of a “hazardous substance” (as those terms are defined in the Comprehensive Environmental Response, Compensation, and Liability Act, 42 U.S.C. § 9601 et seq.) has occurred at, on, above, under or from any properties currently or formerly owned, leased, operated or used by Allied World, any Allied World Subsidiary or any predecessors in interest that are reasonably likely to result in any cost, liability or obligation of Allied World or any Allied World Subsidiary under any applicable Environmental Law.

     3.19 Intellectual Property.

               (a) Each of Allied World and its Subsidiaries owns or otherwise has a valid and enforceable license or right to use material Intellectual Property used in the respective businesses of Allied World and each of its Subsidiaries as currently conducted; and all patents and all registrations for trademarks, service marks and copyrights owned by Allied World or its Subsidiaries are valid and subsisting, except to the extent Allied World or its Subsidiaries have determined to abandon such patents or registrations for trademarks, service marks and copyrights in the exercise of their reasonable business judgment.

               (b) There are no claims pending or threatened in writing by any Person alleging that Allied World or its Subsidiaries or their respective businesses as conducted on the date of this Agreement infringes the Intellectual Property of any Person, which, if determined or resolved adversely against Allied World or any Allied World Subsidiary, would, individually or in the aggregate, reasonably be expected to be material to Allied World and its Subsidiaries, taken as a whole. To the knowledge of Allied World, no Person is infringing the Intellectual Property owned by Allied World or any of its Subsidiaries, which infringement would, individually or in the aggregate, reasonably be expected to be material to Allied World and its Subsidiaries, taken as a whole.

               (c) Allied World and its Subsidiaries have established and are in compliance with commercially reasonable security programs that are sufficient to protect (i) the security, confidentiality and integrity of transactions executed through their computer systems, including encryption and/or other security protocols and techniques when appropriate; and (ii) the security, confidentiality and integrity of all confidential or proprietary data, except, in each case, which would not, individually or in the aggregate, reasonably be expected to have an Allied World Material Adverse Effect. Neither Allied World nor any of its Subsidiaries has suffered a material security breach with respect to their data or systems, and neither Allied World nor any of its Subsidiaries has notified customers or employees of any information security breach. Allied World and its Subsidiaries take reasonable steps to protect their material trade secrets and none of such trade secrets have been disclosed to any Person except pursuant to written and enforceable confidentiality obligations.

     3.20 Allied World Material Contracts.

               (a) Allied World has made available to Transatlantic a true and complete copy of each Contract to which Allied World or any of its Subsidiaries is a party as of the date of this Agreement or by which Allied World, any of its Subsidiaries or any of its respective properties or assets is bound as of the date of this Agreement, which: (i) is a “material contract” within the meaning of Item 601(b)(10) of Regulation S-K promulgated by the SEC (each, an “Allied World Material Contract”); (ii) contains covenants of Allied World or any of its Subsidiaries not to compete or engage in any line of business or compete with any Person in any geographic area; (iii) pursuant to which Allied World or any of its Subsidiaries has entered into a partnership or joint venture with any other Person (other than Allied World or any of its Subsidiaries); (iv) relates to or evidences indebtedness for borrowed money or any guarantee of indebtedness for borrowed money by Allied World or any of its Subsidiaries in excess of ten million dollars

($10,000,000); or (v) evidences any guarantee of obligations of any Person other than a wholly owned Subsidiary of Allied World in excess of ten million dollars ($10,000,000).

               (b) Each Allied World Material Contract is (assuming due power and authority of, and due execution and delivery by the parties thereto other than Allied World or any of its Subsidiaries) a valid and binding obligation of Allied World or its Subsidiaries party thereto, subject to the Bankruptcy and Equity Exception, except (i) to the extent it has previously expired or terminated in accordance with their terms and (ii) for any failures to be valid and binding which would not, individually or in the aggregate, reasonably be expected to have an Allied World Material Adverse Effect. Neither Allied World nor any of its Subsidiaries nor, to the knowledge of Allied World, any other party to any Allied World Material Contract is in breach of or in default under any Allied World Material Contract, and, to the knowledge of Allied World, no event has occurred that, with the lapse of time or the giving of notice or both, would constitute a default thereunder by any party thereto, and neither Allied World nor any of its Subsidiaries has received any claim of any such breach or default, except for such breaches and defaults which would not, individually or in the aggregate, reasonably be expected to have an Allied World Material Adverse Effect.

          3.21 Brokers’ and Finders’ Fees. Except for DB, the fees and expenses of which will be paid by Allied World, there is no investment banker, broker, finder or other intermediary that has been retained by or is authorized to act on behalf of Allied World, Merger Sub or any of their respective Subsidiaries who is entitled to any fee or commission from Allied World, Merger Sub or any of their respective Subsidiaries in connection with the transactions to which Allied World is a party contemplated hereby.

          3.22 Takeover Laws. No “fair price,” “moratorium,” “control share acquisition,” “interested stockholder” or other anti-takeover statute or regulation is applicable to this Agreement, the Merger or the other transactions contemplated hereby by reason of Allied World or Merger Sub being a party to this Agreement, performing its obligations hereunder and consummating the Merger and the other transactions contemplated hereby.

          3.23 Affiliate Transactions. There are no transactions, agreements, arrangements or understandings between (i) Allied World or any of its Subsidiaries, on the one hand, and (ii) any directors, officers or stockholders of Allied World, on the other hand, of the type that would be required to be disclosed under Item 404 of Regulation S-K promulgated under the Securities Act.

          3.24 Insurance Subsidiaries. Each Allied World Subsidiary that conducts the business of insurance or reinsurance (each, an “Allied World P/C Subsidiary”) is (i) duly licensed or authorized as an insurance or reinsurance company, as applicable, in its jurisdiction of incorporation; (ii) duly licensed, authorized or otherwise eligible to transact the business of insurance or reinsurance in each other jurisdiction where it is required to be so licensed, authorized or eligible in order to conduct its business as currently conducted; and (iii) duly licensed, authorized or eligible in its jurisdiction of incorporation and each other applicable jurisdiction where it writes each line of insurance or reinsurance reported as being written in the Allied World Statutory Statements. Each jurisdiction in which any

Allied World P/C Subsidiary is domiciled or commercially domiciled or otherwise licensed, authorized or eligible with respect to the conduct of the business of insurance or reinsurance is set forth in Section 3.24 of the Allied World Disclosure Schedule.

          3.25 Statutory Statements; Examinations.

               (a) Since January 1, 2008, each of the Allied World P/C Subsidiaries has timely filed or submitted all material annual and, to the extent applicable Law requires, quarterly and other periodic statements, together with all exhibits, interrogatories, notes, schedules and any actuarial opinions, affirmations or certifications or other supporting documents in connection therewith, required to be filed with or submitted to the appropriate insurance regulatory authorities of each jurisdiction in which it is licensed, authorized or eligible on forms prescribed or permitted by such authority (as filed through the date hereof and thereafter, collectively, the “Allied World Statutory Statements”), except, in each case, as has been cured or resolved to the satisfaction of such insurance regulatory authority without imposition of any material penalty.

               (b) Allied World has delivered or made available to Transatlantic, to the extent permitted by applicable Law, true and complete copies of all annual Allied World Statutory Statements filed with Governmental Entities for each of the Allied World P/C Subsidiaries for the periods beginning January 1, 2008, each in the form (including exhibits, annexes and any amendments thereto) filed with the applicable insurance regulatory authority. Financial statements included in the Allied World Statutory Statements were prepared in conformity with applicable SAP, consistently applied for the periods covered thereby, were prepared in accordance with the books and records of the applicable Allied World P/C Subsidiary, and present fairly in all material respects the statutory financial position of the relevant Allied World P/C Subsidiary as of the respective dates thereof and the results of operations, cash flows, and changes in capital and surplus (or stockholders’ equity, as applicable) of such Allied World P/C Subsidiary for the respective periods then ended. The Allied World Statutory Statements complied in all material respects with all applicable Laws when filed or submitted and no material violation or deficiency has been asserted in writing (or, to the knowledge of Allied World, orally) by any Governmental Entity with respect to any of the Allied World Statutory Statements that have not been cured or otherwise resolved to the satisfaction of such Governmental Entity. The statutory balance sheets and income statements included in the annual Allied World Statutory Statements have been audited by Allied World’s independent auditors, and Allied World has delivered or made available to Transatlantic true and complete copies of all audit opinions related thereto for the periods beginning January 1, 2008 through the date hereof, in each case as filed with the insurance regulatory authority of the jurisdiction of domicile of such Allied World P/C Subsidiary. Except as is indicated therein, all assets that are reflected on the Allied World Statutory Statements comply in all material respects with all applicable Insurance Laws regulating the investments of the Allied World P/C Subsidiaries and all applicable Insurance Laws with respect to admitted assets. The financial statements included in the Allied World Statutory Statements accurately reflect in all material respects the extent to which, pursuant to applicable Laws and applicable SAP, the applicable Allied World P/C Subsidiary is entitled to take credit for reinsurance (or any local equivalent concept) on such Allied World Statutory Statements.

               (c) Allied World has delivered or made available to Transatlantic, to the extent permitted by applicable Law, true and complete copies of all examination reports (and has notified the other party of any pending examinations) of any insurance regulatory authorities received by it on or after January 1, 2008 through the date hereof relating to the Allied World P/C Subsidiaries. Except as set forth in Section 3.25(c) of the Allied World Disclosure Schedule, all material deficiencies or violations noted in the examination reports have been resolved to the reasonable satisfaction of the insurance regulatory authority that noted such deficiencies or violations.

               (d) Section 3.25(d) of the Allied World Disclosure Schedule sets forth a true and complete list of permitted practices under SAP that are used in any of the Allied World Statutory Statements of any Allied World P/C Subsidiary.

          3.26 Agreements with Regulators. Except as required by Insurance Laws and the insurance and reinsurance licenses maintained by the Allied World P/C Subsidiaries or as set forth in Section 3.26 of the Allied World Disclosure Schedule, there are no written agreements, memoranda of understanding, commitment letters or similar undertakings binding on it or any of its subsidiaries or to which Allied World or any Allied World Subsidiaries is a party, on the one hand, and any Governmental Entity is a party or addressee, on the other hand, or any Orders or directives by, or supervisory letters or cease-and-desist orders from, any Governmental Entity, neither has Allied World nor any Allied World Subsidiary adopted any board resolution at the request of any Governmental Entity, in each case specifically with respect to Allied World or any Allied World Subsidiary, which (a) limit the ability of Allied World or any Allied World P/C Subsidiary to issue or enter into Insurance Contracts, Allied World Reinsurance Contracts or other material reinsurance or retrocession treaties or agreements, slips, binders, cover notes or other similar arrangements; (b) require any divestiture of any investment of any Allied World Subsidiary; (c) in any manner relate to the ability of any Allied World Subsidiary to pay dividends; (d) require any investment of any Allied World P/C Subsidiary to be treated as non-admitted assets (or the local equivalent); or (e) otherwise restrict the conduct of business of Allied World or any Allied World Subsidiary, nor has it been advised in writing by any Governmental Entity that it is contemplating any such undertakings.

          3.27 Reinsurance and Retrocession.

               (a) As of the date of this Agreement, all material reinsurance or retrocession treaties or agreements, slips, binders, cover notes or other similar arrangements pursuant to which any Allied World P/C Subsidiary is the cedent (the “Allied World Reinsurance Contracts”) are, and after the consummation of the transactions contemplated hereby will continue to be, valid and binding obligations of Allied World and the Allied World Subsidiaries (to the extent they are parties thereto or bound thereby) and, to Allied World’s knowledge, each other party thereto, in accordance with their terms and are in full force and effect, and Allied World and the Allied World Subsidiaries (to the extent they are party thereto or bound thereby) and, to Allied World’s knowledge, each other party thereto has performed in all material respects all obligations required to be performed by it under each Allied World Reinsurance Contract. Neither Allied World nor any of the Allied World Subsidiaries has received notice, nor does it have knowledge, of any violation or default in respect of any material obligation under (or any

condition which, with the passage of time or the giving of notice or both, would result in such a violation or default), or any intention to cancel, terminate or change the scope of rights and obligations under, or not to renew, any Allied World Reinsurance Contract. Since January 1, 2008, (i) neither Allied World nor the Allied World Subsidiaries have received any written notice from any party to an Allied World Reinsurance Contract that any amount of reinsurance ceded by Allied World or such Allied World Subsidiary to such counterparty will be uncollectible or otherwise defaulted upon; (ii) to Allied World’s knowledge, no party to an Allied World Reinsurance Contract is insolvent or the subject of a rehabilitation, liquidation, conservatorship, receivership, bankruptcy or similar proceeding; (iii) to Allied World’s knowledge, the financial condition of any party to an Allied World Reinsurance Contract is not impaired to the extent that a default thereunder is reasonably anticipated; (iv) there are no material disputes under any Allied World Reinsurance Contract other than disputes in the ordinary course for which adequate loss reserves have been established; and (v) Allied World’s relevant Allied World P/C Subsidiary is entitled under any applicable Law and applicable SAP to take full credit in its Allied World Statutory Statements for all amounts recoverable by it pursuant to any Allied World Reinsurance Contract and all such amounts recoverable have been properly recorded in its books and records of account (if so accounted therefor) and are properly reflected in the Allied World Statutory Statements, except for such events or circumstances as have not been and would not reasonably be expected to be, individually or in the aggregate, material to Allied World and its Subsidiaries, taken as a whole.

               (b) Except for such events or circumstances as have not been and would not reasonably be expected to be, individually or in the aggregate, material to Allied World and its Subsidiaries, taken as a whole, with respect to any Allied World Reinsurance Contract for which an Allied World P/C Subsidiary as ceding insurer thereto is taking credit on its most recent Allied World Statutory Statements, to its knowledge, from and after January 1, 2008 (i) there has been no separate written or oral agreement between such Allied World P/C Subsidiary and the assuming reinsurer that would under any circumstances reduce, limit, mitigate or otherwise affect any actual or potential loss to the parties under any such Allied World Reinsurance Contract, other than inuring contracts that are explicitly defined in any such Allied World Reinsurance Contract; (ii) for each such Allied World Reinsurance Contract entered into, renewed or amended on or after January 1, 2008, for which risk transfer is not reasonably considered to be self-evident to the extent required by any applicable provisions of Statement of Statutory Accounting Principles (SSAP) No. 62, documentation concerning the economic intent of the transaction and the risk transfer analysis evidencing the proper accounting treatment is available for review by the relevant Governmental Entities for such Allied World P/C Subsidiary; (iii) the Allied World P/C Subsidiary that is a party thereto, and to its knowledge, any other party thereto, complies and has complied from and after January 1, 2008 with any applicable requirements set forth in SSAP No. 62; and (iv) such Allied World P/C Subsidiary has and has had since January 1, 2008 appropriate controls in place to monitor the use of reinsurance and comply with the provisions of SSAP No. 62.

          3.28 Rating Agency. Since December 31, 2010, no rating agency has imposed conditions (financial or otherwise) on retaining any currently held rating assigned to any Allied World P/C Subsidiary or, to the knowledge of Allied World, stated to Allied World that it is considering lowering any rating assigned to any Allied World P/C Subsidiary or placing any Allied World P/C Subsidiary on an “under review” status. As of the date of this

Agreement, each U.S Allied World P/C Subsidiary has the A.M. Best Company rating set forth in Section 3.28 of the Allied World Disclosure Schedule.

     3.29 Reserves.

               (a) The insurance policy reserves for claims, losses (including incurred but not reported losses), loss adjustment expenses (whether allocated or unallocated) and unearned premium of each Allied World P/C Subsidiary contained in its Allied World Statutory Statements (i) were determined in all material respects in accordance with generally accepted actuarial standards consistently applied (except as otherwise noted in the financial statements and notes thereto included in such financial statements) and (ii) satisfied the requirements of all applicable Insurance Laws in all material respects.

               (b) Allied World has made available to Transatlantic true and complete copies of all material actuarial reports prepared by actuaries, independent or otherwise, from and after January 1, 2008, with respect to the Allied World P/C Subsidiaries, and all material attachments, addenda, supplements and modifications thereto. There have been no actuarial reports of a similar nature covering any Allied World P/C Subsidiary in respect of any period subsequent to the latest period covered in such actuarial reports. The information and data furnished by Allied World and the Allied World Subsidiaries to its independent actuaries in connection with the preparation of such actuarial reports were accurate in all material respects for the periods covered in such reports.

          3.30 Risk-Based Capital. Allied World has made available to Transatlantic true and complete copies of all analyses and reports submitted by Allied World to any insurance regulatory authority during the past twenty-four (24) months relating to risk-based capital calculations (“Allied World Risk-Based Capital Reports”). The Allied World Risk-Based Capital Reports were true and accurate in all material respects at the time of submission.

     3.31 Insurance Issued by the Allied World P/C Subsidiaries.

               (a) All policies, binders, slips, certificates, and other agreements of insurance issued or distributed by any Allied World P/C Subsidiary in any jurisdiction (“Insurance Contracts”) have been issued or distributed, to the extent required by Law, on forms filed with and approved by all applicable insurance departments, or not objected to by any such insurance department within any period provided for objection, and all such forms comply with applicable Laws. All premium rates with respect to the Insurance Contracts, to the extent required by Law, have been filed with and approved by all applicable insurance departments or were not objected to by any such insurance department within any period provided for objection. All such premium rates comply with applicable Laws and are within the amount permitted by such Laws. Each of Allied World and each of the Allied World Subsidiaries is and has been marketing, selling and issuing Insurance Contracts in compliance in all material respects with all applicable Laws, all applicable orders and directives of all insurance regulatory authorities and all market conduct recommendations resulting from market conduct or other examinations of insurance regulatory authorities in the respective jurisdictions in which such products have been marketed, issued or sold, have been complied with in connection with the marketing and sale of Insurance

Contracts. All Insurance Contracts due and payable by or on behalf of any Allied World P/C Subsidiary have in all material respects been paid in accordance with the terms of the Insurance Contracts under which they arose, except for such benefits for which Allied World believes there is a reasonable basis to contest payment.

               (b) There are no unpaid claims or assessments made against any Allied World P/C Subsidiary by any state insurance guaranty associations or similar organizations in connection with such association’s insurance guarantee fund.

               (c) All underwriting, management and administration agreements entered into by any Allied World P/C Subsidiary are, to the extent required by Law, in forms acceptable to all applicable insurance departments or have been filed with and approved by all applicable insurance departments or were not objected to by any such insurance department within any period provided for objection.

               (d) All advertising, promotional, sales and solicitation materials and all product illustrations used by any Allied World P/C Subsidiary or any agent, broker, intermediary, manager or producer employed or engaged by any Allied World P/C Subsidiary of any Allied World P/C Subsidiary are in material compliance with applicable Laws.

               (e) Since December 31, 2010, (i) salaried employees of Allied World and the Allied World Subsidiaries and, to the knowledge of Allied World, each other Person, who, in each of the foregoing cases, is performing the duties of insurance producer or reinsurance intermediary for Allied World and the Allied World Subsidiaries (collectively, “Allied World Agents”), at the time such Allied World Agent wrote, sold or produced business for or on behalf of Allied World or any Allied World Subsidiary that requires a license, was duly licensed and appointed as required by applicable Law, in the particular jurisdiction in which such Allied World Agent wrote, sold or produced business, and to the knowledge of Allied World, no Allied World Agent is in violation of (or with or without notice or lapse of time or both, would have violated) any term or provision of any Law applicable to the writing, sale, production or solicitation of insurance or other business for or on behalf of Allied World or any Allied World Subsidiary, except for such failures to be so licensed or such violations which have been cured, which have been resolved or settled through agreements with the applicable Governmental Entity, or which are barred by an applicable statute of limitations, and (ii) each of the agency agreements and appointments between the Allied World Agents and Allied World and any Allied World Subsidiary, is valid and binding and in full force and effect in accordance with its terms, except as would not, individually or in the aggregate, reasonably be expected to have an Allied World Material Adverse Effect. As of the date of this Agreement, no Allied World Agent individually accounting for 1% or more of the total gross premiums of all Allied World Subsidiaries for the year ended December 31, 2010 has notified Allied World or any Allied World Subsidiary that such Allied World Agent will be unable in any material respect or unwilling to continue its relationship as an Allied World Agent with Allied World or any Allied World Subsidiary within twelve (12) months after the date hereof.

          3.32 Other Allied World Insurance Business. Neither Allied World nor any of its Subsidiaries nor any of their respective salaried employees is performing the duties of

insurance producer or reinsurance intermediary for any Person that is not an Affiliate of Allied World.

          3.33 Redomestication. The contribution in kind, scheme of arrangement and related transactions pursuant to which Allied World became the ultimate parent of the Prior Allied World Parent on December 1, 2010 (the “Redomestication”) were conducted in material compliance with all applicable Laws. The Prior Allied World Parent, Allied World and the other parties to the Redomestication had all necessary corporate power and authority to effect the Redomestication.

     3.34 No Other Representations and Warranties; Disclaimer.

               (a) Except for the representations and warranties made by Allied World and Merger Sub in this Article III, neither Allied World, Merger Sub nor any other Person makes any express or implied representation or warranty with respect to Allied World, Merger Sub or any of their respective Subsidiaries or their respective businesses, operations, assets, liabilities, condition (financial or otherwise) or prospects, and Allied World and Merger Sub hereby disclaim any such other representations or warranties. In particular, without limiting the foregoing disclaimer, except for the representations and warranties made by Allied World and Merger Sub in this Article III, neither Allied World, Merger Sub nor any other Person makes or has made any representation or warranty to Transatlantic or any of its Affiliates or Representatives with respect to (i) any financial projection, forecast, estimate, budget or prospective information relating to Allied World, Merger Sub, any of their respective Subsidiaries or their respective businesses or operations, or (ii) any oral or written information presented to Transatlantic or any of its Affiliates or Representatives in the course of its due diligence investigation of Allied World and Merger Sub, the negotiation of this Agreement or in the course of the transactions contemplated hereby.

               (b) Notwithstanding anything contained in this Agreement to the contrary, Allied World and Merger Sub acknowledge and agree that neither Transatlantic nor any other Person has made or is making any representations or warranties whatsoever, express or implied, beyond those expressly given by Transatlantic in Article IV hereof, including any implied representation or warranty as to the accuracy or completeness of any information regarding Transatlantic furnished or made available to Allied World, Merger Sub, or any of their respective Affiliates or Representatives. Without limiting the generality of the foregoing, Allied World and Merger Sub acknowledge and agree that no representations or warranties are made with respect to any projections, forecasts, estimates, budgets or prospect information that may have been made available to Allied World, Merger Sub or any of their respective Affiliates or Representatives.

ARTICLE IV.
REPRESENTATIONS AND WARRANTIES OF TRANSATLANTIC

     Except as (x) disclosed in the Transatlantic SEC Documents filed with or furnished to the SEC at least one (1) Business Day prior to the date of this Agreement (excluding disclosure contained in the “risk factors” section or constituting “forward-looking statements,” in each case, to the extent such disclosure is cautionary, predictive or speculative in nature) or (y) set forth in

the disclosure letter delivered by Transatlantic to Allied World on or prior to the date of this Agreement (the “Transatlantic Disclosure Schedule”), Transatlantic represents and warrants to Allied World as set forth in this Article IV. For purposes of the representations and warranties of Transatlantic contained herein, disclosure in any section of the Transatlantic Disclosure Schedule of any facts or circumstances shall be deemed to be disclosure of such facts or circumstances with respect to all representations or warranties by Transatlantic to which the relevance of such disclosure to the applicable representation and warranty is reasonably apparent on the face thereof. The inclusion of any information in the Transatlantic Disclosure Schedule or other document delivered by Transatlantic pursuant to this Agreement shall not be deemed to be an admission or evidence of the materiality of such item, nor shall it establish a standard of materiality for any purpose whatsoever.

     4.1 Corporate Organization.

               (a) Transatlantic (i) is a corporation duly organized, validly existing and in good standing under the laws of the State of Delaware, (ii) has all organizational powers and all material governmental licenses, authorizations, permits, consents and approvals required to carry on its business as now conducted and (iii) is duly qualified to do business as a foreign corporation in each jurisdiction where such qualification is necessary, except for such variances from the matters set forth in any of clauses (ii) or (iii) as would not, individually or in the aggregate, reasonably be expected to have a Transatlantic Material Adverse Effect.

               (b) True and complete copies of the Certificate of Incorporation of Transatlantic, as amended through, and as in effect as of, the date of this Agreement (the “Transatlantic Charter”), and the Bylaws of Transatlantic, as amended through, and as in effect as of, the date of this Agreement (the “Transatlantic Bylaws”), have previously been made available to Allied World.

               (c) Each Transatlantic Subsidiary (i) is duly organized, validly existing and in good standing under the laws of its jurisdiction of organization, (ii) is duly licensed or qualified to do business in each jurisdiction in which the nature of the business conducted by it or the character or location of the properties and assets owned or leased by it makes such licensing or qualification necessary, and (iii) has all requisite corporate power and authority to own or lease its properties and assets and to carry on its business as now conducted, except for such variances from the matters set forth in any of clauses (i), (ii) or (iii) as would not, individually or in the aggregate, reasonably be expected to have a Transatlantic Material Adverse Effect.

     4.2 Capitalization.

               (a) Authorized and Issued Shares.

               (i) As of the date of this Agreement, the authorized capital stock of Transatlantic consists of 200,000,000 shares of Transatlantic Common Stock and 10,000,000 shares of preferred stock of Transatlantic, par value $1.00 (the “Transatlantic Preferred Stock”). As of the Measurement Date, (i) 62,475,513 shares of Transatlantic Common Stock and no shares of Transatlantic Preferred Stock were issued and outstanding, (ii) 5,362,800 shares of Transatlantic Common Stock were held in treasury,

(iii) 2,082,687 shares of Transatlantic Common Stock were subject to outstanding Transatlantic RSUs, (iv) 2,024,855 shares of Transatlantic Common Stock were subject to outstanding Transatlantic Stock Options (of which Transatlantic Stock Options to purchase an aggregate of 1,975,480 shares of Transatlantic Common Stock were exercisable), (v) no shares of Transatlantic Common Stock were subject to outstanding Transatlantic Restricted Shares and (vi) no shares of Transatlantic Common Stock were subject to Transatlantic SARs. Section 4.2 of the Transatlantic Disclosure Schedule contains a complete and correct list, as of the Measurement Date, of each outstanding Transatlantic Stock Option, each outstanding Transatlantic RSU, each outstanding Transatlantic Restricted Share and each outstanding Transatlantic SAR, including, as applicable, the holder, date of grant, exercise price (to the extent applicable), vesting schedule and number of shares of Transatlantic Common Stock subject thereto and each Transatlantic Stock Plan.

               (ii) As of the date of this Agreement, except for this Agreement, Transatlantic Stock Options, Transatlantic RSUs, Transatlantic Restricted Shares, and Transatlantic SARs, there are not issued, reserved for issuance or outstanding, and there are not any outstanding obligations of Transatlantic or any Transatlantic Subsidiary to issue, deliver or sell, or cause to be issued, delivered or sold, any Equity Equivalents of Transatlantic or any Transatlantic Subsidiary. Except for Forfeitures and Cashless Settlements in connection with the Transatlantic Stock Options and Transatlantic Stock-Based Awards, there are not any outstanding obligations of Transatlantic or any of the Transatlantic Subsidiaries to directly or indirectly redeem, repurchase or otherwise acquire any shares of capital stock or voting securities of, other equity interests in or Equity Equivalents of Transatlantic or any Transatlantic Subsidiary. Neither Transatlantic nor any of the Transatlantic Subsidiaries is a party to any voting agreement with respect to the voting of any capital stock or voting securities of, or other equity interests in, Transatlantic. All outstanding shares of capital stock of Transatlantic have been, and all shares that may be issued pursuant to any employee stock option or other compensation plan or arrangement or warrant will be, when issued in accordance with the respective terms thereof, duly authorized and validly issued and fully paid. The consummation of the Merger and the other transactions contemplated hereby or taken in contemplation of this Agreement will not, as of the Effective Time, trigger any preemptive rights of any Person with respect to the capital stock of Transatlantic, whether by law or otherwise. With respect to the Transatlantic Stock Options, (A) each grant of a Transatlantic Stock Option was duly authorized no later than the Grant Date by all necessary corporate action, including, as applicable, approval by the Transatlantic Board, or a committee thereof, or a duly authorized delegate thereof, and any required approval by the stockholders of Transatlantic by the necessary number of votes or written consents, and the award agreement governing such grant, if any, was duly executed and delivered by each party thereto within a reasonable time following the Grant Date, (B) each such grant was made in accordance with the terms of the applicable Transatlantic Stock Plan, the Exchange Act and all other applicable Law, including the rules of the NYSE, (C) the per share exercise price of each Transatlantic Stock Option was not less than the fair market value of a share of Transatlantic Common Stock on the applicable Grant Date, (D) each such grant was properly accounted for in all material respects in accordance with GAAP in the financial statements (including the related notes) of

Transatlantic and disclosed in Transatlantic’s filings with the SEC in accordance with the Exchange Act and all other applicable Laws, and (E) no amendments, modifications or other changes have been made to any such grants after the Grant Date.

               (b) As of the date of this Agreement, no bonds, debentures, notes or other indebtedness of Transatlantic having the right to vote on any matters on which stockholders may vote are issued or outstanding.

               (c) All of the issued and outstanding shares of capital stock or other equity ownership interests of each “significant subsidiary” (as such term is defined under Regulation S-X promulgated by the SEC) of Transatlantic and of each Transatlantic P/C Subsidiary are owned by Transatlantic, directly or indirectly, free and clear of any material Liens other than Permitted Liens, and free of any restriction on the right to vote, sell or otherwise dispose of such capital stock or other equity ownership interest (other than restrictions under applicable securities Laws), and all of such shares or equity ownership interests are duly authorized and validly issued and are fully paid, nonassessable and free of preemptive rights. Except for the capital stock or other equity ownership interests of the Transatlantic Subsidiaries, as of the date of this Agreement, Transatlantic does not beneficially own, directly or indirectly, any capital stock, membership interest, partnership interest, joint venture interest or other equity interest in any Person.

     4.3 Corporate Authorization.

               (a) Transatlantic has all necessary corporate power and authority to execute and deliver this Agreement, to perform its obligations hereunder and to consummate the transactions to which it is a party contemplated hereby subject to obtaining the Transatlantic Requisite Stockholder Vote. The execution, delivery and performance by Transatlantic of this Agreement and the consummation by Transatlantic of the transactions to which it is a party contemplated hereby have been duly and validly authorized and approved by the Transatlantic Board. The Transatlantic Board has, by resolutions duly adopted, unanimously determined that this Agreement and the transactions contemplated hereby are in the best interests of Transatlantic and its stockholders, has approved and adopted this Agreement and the plan of merger herein providing for the Merger, upon the terms and subject to the conditions set forth herein, approved the execution, delivery and performance by Transatlantic of this Agreement and the consummation of the transactions to which it is a party contemplated hereby, upon the terms and subject to the conditions set forth herein and has resolved, subject to Section 5.5, to recommend approval of each of the matters constituting the Transatlantic Requisite Stockholder Vote by the stockholders of Transatlantic (such recommendation, the “Transatlantic Board Recommendation”) and that such matters and recommendation be submitted for consideration at a duly held meeting of the stockholders of Transatlantic for a vote for such purposes (the “Transatlantic Stockholders Meeting”). Except solely in the case of the Merger, for the adoption of this Agreement by the affirmative vote of the holders of a majority of the shares of Transatlantic Common Stock (the “Transatlantic Requisite Stockholder Vote”), no other corporate proceedings on the part of Transatlantic or any other vote by the holders of any class or series of capital stock of Transatlantic are necessary to approve or adopt this Agreement or to consummate the transactions contemplated hereby (except for the filing of the Certificate of Merger and the Restated Articles, as required by applicable Law).

               (b) This Agreement has been duly executed and delivered by Transatlantic and, assuming due power and authority of, and due execution and delivery by, the other parties hereto, constitutes a valid and binding obligation of Transatlantic, enforceable against Transatlantic in accordance with its terms, subject to the Bankruptcy and Equity Exception.

          4.4 Governmental Authorization. The execution, delivery and performance by Transatlantic of this Agreement and the consummation by Transatlantic of the transactions to which it is a party contemplated hereby require at or prior to the Closing no consent or approval by, or filing with, or notification to any Governmental Entity, other than (a) the filing of the Certificate of Merger with the Secretary of State of the State of Delaware and appropriate documents with the relevant authorities of other states in which Transatlantic is qualified to do business, (b) the filing of the Restated Articles with the appropriate Swiss Governmental Entities, (c) compliance with any applicable requirements of the HSR Act and any other Antitrust Law, (d) compliance with any applicable requirements of the Securities Act, the Exchange Act, any other applicable U.S. federal or state securities Laws or “blue sky” Laws, and any foreign securities Laws, (e) compliance with any applicable requirements of the NYSE, (f) approvals or filings under all applicable Insurance Laws as set forth in Section 4.4 of the Transatlantic Disclosure Schedule (the “Transatlantic Insurance Approvals”), (g) the Allied World Insurance Approvals (assuming the accuracy and completeness of Section 3.4(f)), (h) those consents, approvals or filings as may be required as a result of the business or identity of Allied World or any of its Affiliates (assuming the accuracy and completeness of Section 3.4(f)) and (i) any other consents, approvals or filings the failure of which to be obtained or made would not, individually or in the aggregate, reasonably be expected to have a Transatlantic Material Adverse Effect or prevent or materially delay the consummation of the transactions contemplated by this Agreement.

          4.5 Non-Contravention. The execution, delivery and performance by Transatlantic of this Agreement do not, and the consummation of the transactions to which it is a party contemplated hereby will not, (a) violate or conflict with or result in any breach of any provision of the Organizational Documents of Transatlantic or any of its Subsidiaries; (b) assuming receipt of the Transatlantic Requisite Stockholder Vote and compliance with the matters referred to in Section 3.4 and Section 4.4 (and assuming the accuracy and completeness of Section 3.4(f)), violate or conflict with any provision of any applicable Law; (c) violate or conflict with or result in any breach or constitute a default, or an event that, with or without notice or lapse of time or both, would constitute a default under, or cause the termination, cancellation, acceleration or other change of any right or obligation or the loss of any benefit to which Transatlantic or any of its Subsidiaries is entitled, or require consent by any Person under, any loan or credit agreement, note, mortgage, indenture, lease, Transatlantic Benefit Plan, or Transatlantic Material Contract; or (d) subject to the receipt of the Transatlantic Insurance Approvals (and assuming the accuracy and completeness of Section 3.4(f)), result in the creation or imposition of any Lien (other than Permitted Liens) on any asset of Transatlantic or any of its Subsidiaries, except in the case of clause (b), (c) or (d), as would not, individually or in the aggregate, reasonably be expected to have a Transatlantic Material Adverse Effect or prevent or materially delay the consummation of the transactions contemplated by this Agreement.

     4.6 Transatlantic SEC Filings, Etc.

               (a) Transatlantic has timely filed all reports, schedules, forms, registration statements and other documents required to be filed by Transatlantic with the SEC since January 1, 2008 (together with any documents furnished during such period by Transatlantic to the SEC on a voluntary basis on Current Reports on Form 8-K and any reports, schedules, forms, registration statements and other documents filed with the SEC subsequent to the date hereof, collectively, the “Transatlantic SEC Documents”). Each of the Transatlantic SEC Documents, as amended prior to the date of this Agreement, complied (and each Transatlantic SEC Document filed subsequent to the date hereof will comply) in all material respects with, to the extent in effect at the time of filing or furnishing, the requirements of the Securities Act and the Exchange Act applicable to such Transatlantic SEC Documents, and none of the Transatlantic SEC Documents when filed or furnished or, if amended prior to the date of this Agreement, as of the date of such amendment, contained, or with respect to the Transatlantic SEC Documents filed subsequent to the date hereof, will contain, any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading. To the knowledge of Transatlantic, there are no material unresolved comments received from the SEC staff with respect to the Transatlantic SEC Documents on or prior to the date hereof. To the knowledge of Transatlantic, none of the Transatlantic SEC Documents filed on or prior to the date hereof is subject to ongoing SEC review or investigation.

               (b) Transatlantic maintains a system of internal control over financial reporting (within the meaning of Rules 13a-15(f) and 15d-15(f) of the Exchange Act) sufficient to provide reasonable assurances regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP. Transatlantic (i) maintains disclosure controls and procedures (within the meaning of Rules 13a-15(e) and 15d-15(e) of the Exchange Act) designed to ensure that information required to be disclosed by Transatlantic in the reports that it files and submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, including that information required to be disclosed by Transatlantic in the reports that it files and submits under the Exchange Act is accumulated and communicated to management of Transatlantic, as appropriate, to allow timely decisions regarding required disclosure, and (ii) has disclosed, based upon the most recent (prior to the date of this Agreement) evaluation by the chief executive officer and chief financial officer of Transatlantic of Transatlantic’s internal control over financial reporting, to its auditors and the audit committee of the Transatlantic Board (A) all significant deficiencies and material weaknesses in the design or operation of Transatlantic’s internal control over financial reporting which are reasonably likely to adversely affect in any material respect its ability to record, process, summarize and report financial data and (B) any fraud, whether or not material, that involves management or other employees who have a significant role in Transatlantic’s internal control over financial reporting. Transatlantic has made available to Allied World true and complete copies of any such disclosure contemplated by clauses (A) and (B) made by management to Transatlantic’s independent auditors and the audit committee of the Transatlantic Board since January 1, 2008.

               (c) Neither Transatlantic nor any of its Subsidiaries is a party to, or has any commitment to become a party to, any joint venture, off-balance sheet partnership or any similar Contract (including any Contract relating to any transaction or relationship between or among Transatlantic and any of its Subsidiaries, on the one hand, and any unconsolidated Affiliate, including any structured finance, special purpose or limited purpose entity, on the other hand, or any “off-balance sheet arrangement” (as defined in Item 303(a) of Regulation S-K promulgated by the SEC)), where the result, purpose or intended effect of such Contract is to avoid disclosure of any material transaction involving, or material liabilities of, Transatlantic or any of its Subsidiaries in the Transatlantic SEC Documents.

               (d) Transatlantic is in compliance in all material respects with (i) the provisions of SOX and (ii) the rules and regulations of the NYSE, in each case, that are applicable to Transatlantic.

               (e) Neither Transatlantic nor any Transatlantic Subsidiary, nor, to the knowledge of Transatlantic, any director, officer, agent, employee or Affiliate of Transatlantic or any Transatlantic Subsidiary is aware of any action, or any allegation made by any Governmental Entity of any action, or has taken any action, directly or indirectly, (i) that would constitute a violation by such Persons of the FCPA, including making use of the mails or any means or instrumentality of interstate commerce corruptly in furtherance of an offer, payment, promise to pay or authorization of the payment of any money, or other property, gift, promise to give, or authorization of the giving of anything of value to any “foreign official” (as such term is defined in the FCPA) or any foreign political party or official thereof or any candidate for foreign political office, in contravention of the FCPA, or (ii) that would constitute an offer to pay, a promise to pay or a payment of money or anything else of value, or an authorization of such offer, promise or payment, directly or indirectly, to any employee, agent or representative of another company or entity in the course of their business dealings with Transatlantic or any Transatlantic Subsidiary, in order to unlawfully induce such person to act against the interest of his or her employer or principal. There is no current, pending, or, to the knowledge of Transatlantic, threatened charges, proceedings, investigations, audits, or complaints against Transatlantic or any Transatlantic Subsidiary or, to the knowledge of Transatlantic, any director, officer, agent, employee or Affiliate of Transatlantic with respect to the FCPA or any other anti-corruption Law or regulation.

          4.7 Transatlantic Financial Statements. The consolidated financial statements (including all related notes thereto) of Transatlantic included in the Transatlantic SEC Documents (if amended, as of the date of the last such amendment filed prior to the date of this Agreement) fairly present in all material respects the consolidated financial position of Transatlantic and its consolidated Subsidiaries, as at the respective dates thereof, and the consolidated results of their operations, the changes in stockholder’s equity and their consolidated cash flows for the respective periods then ended (subject, in the case of the unaudited statements, to normal year-end audit adjustments and to the absence of information or notes not required by GAAP to be included in interim financial statements) and were prepared, in all material respects, in accordance with, and complied, in all material respects, with GAAP during the periods involved (except, in the case of the unaudited statements, as permitted by the SEC) applied on a consistent basis (except as may be indicated therein or in the notes thereto).

          4.8 Form S-4. The information supplied or to be supplied by Transatlantic specifically for inclusion in the Form S-4 shall not, at the time that the Form S-4 is declared effective by the SEC, contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading, except that no representation or warranty is made by Transatlantic with respect to statements made therein based on information supplied by or on behalf of Allied World or Merger Sub specifically for inclusion in the Form S-4. The Joint Proxy Statement/Prospectus will not, at the date the Joint Proxy Statement/Prospectus is first mailed to the stockholders of Transatlantic and at the time of the Transatlantic Stockholders Meeting, contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading, except that, in each case, no representation or warranty is made by Transatlantic with respect to statements made therein based on information supplied by or on behalf of Allied World or Merger Sub specifically for inclusion in the Joint Proxy Statement/Prospectus.

     4.9 Absence of Certain Changes or Events.

               (a) Since December 31, 2010, no event or events or development or developments have occurred that have had or would reasonably be expected to have, individually or in the aggregate, a Transatlantic Material Adverse Effect.

               (b) Except in connection with the execution and delivery of this Agreement and the transactions contemplated by this Agreement, from December 31, 2010 through the date of this Agreement, Transatlantic and the Transatlantic Subsidiaries have carried on their respective businesses in all material respects in the ordinary course of business consistent with past practice.

          4.10 No Undisclosed Material Liabilities. There are no material liabilities or obligations of Transatlantic or any of its Subsidiaries of any nature, whether accrued, contingent, absolute, determined, determinable or otherwise, whether or not required by GAAP to be reflected on a consolidated balance sheet of Transatlantic and its Subsidiaries other than: (a) liabilities or obligations reflected or reserved against in Transatlantic’s consolidated balance sheet as of March 31, 2011 included in the Transatlantic SEC Documents or in the notes thereto and (b) liabilities or obligations that were incurred since March 31, 2011 in the ordinary course of business consistent with past practice.

     4.11 Compliance with Laws.

               (a) Since January 1, 2008, (i) the business and operations of Transatlantic and its Subsidiaries have been conducted in compliance with all applicable Laws (including Insurance Laws) and (ii) Transatlantic has complied with the applicable listing and corporate governance rules and regulations of the NYSE except, in each case, where the failure to so conduct such business and operations or comply with such rules and regulations would not, individually or in the aggregate, reasonably be expected to have a Transatlantic Material Adverse

Effect, or prevent or materially delay the consummation of the transactions contemplated by this Agreement.

               (b) All of the Transatlantic Permits of each Transatlantic P/C Subsidiary conducting insurance operations are in full force and effect in accordance with their terms and there is no proceeding or investigation to which Transatlantic or any Transatlantic Subsidiary is subject before a Governmental Entity that is pending or threatened in writing that would reasonably be expected to result in the revocation, failure to renew or suspension of, or placement of a restriction on, any such Transatlantic Permits, except where the failure to be in full force and effect in accordance with their terms, revocation, failure to renew, suspension or restriction would not, individually or in the aggregate, reasonably be expected to have a Transatlantic Material Adverse Effect, or prevent or materially delay the consummation of the transactions contemplated by this Agreement.

               (c) There is no proceeding to which Transatlantic or any Transatlantic Subsidiary is subject before any Governmental Entity pending or threatened in writing regarding whether any of the Transatlantic Subsidiaries has violated any applicable Laws (including Insurance Laws), nor, any investigation by any Governmental Entity pending or threatened in writing with respect to possible violations of any applicable Laws, which, if determined or resolved adversely against Transatlantic or any Transatlantic Subsidiary, would, individually or in the aggregate, reasonably be expected to be material to Transatlantic and its Subsidiaries, taken as a whole, or would reasonably be expected to prevent or materially delay the consummation of the transactions contemplated by this Agreement. Since January 1, 2008, each Transatlantic P/C Subsidiary has timely filed all material reports, registrations, statements and certifications, together with any amendments required to be made with respect thereto, required to be filed by it with any applicable Insurance Regulator or such failure to file has been remedied.

          4.12 Litigation. There is no action, suit, investigation, claim, complaint, demand, summons, cease and desist letter, subpoena, Injunction, notice of violation or other proceeding pending against or threatened in writing against Transatlantic or any of its Subsidiaries or pending against or threatened in writing against any present or former officer, director or employee of Transatlantic or any Transatlantic Subsidiary in connection with which Transatlantic or any Transatlantic Subsidiary has an indemnification obligation, before any Governmental Entity (other than insurance and reinsurance claims litigation or arbitration arising in the ordinary course of business), which, if determined or resolved adversely in accordance with the plaintiff’s or claimant’s demands, would, individually or in the aggregate, reasonably be expected to be material to Transatlantic and its Subsidiaries, taken as a whole, or would reasonably be expected to prevent or materially delay the consummation of the transactions contemplated hereby. There is no Order outstanding against Transatlantic or any of its Subsidiaries which would, individually or in the aggregate, reasonably be expected to be material to Transatlantic and its Subsidiaries, taken as a whole, or would reasonably be expected to prevent or materially delay the consummation of the transactions contemplated hereby.

          4.13 Title to Properties; Absence of Liens. Section 4.13 of the Transatlantic Disclosure Schedule sets forth a true and complete description (including address, and for

each lease, sublease and license, and all amendments, extensions, renewals, guaranties, modifications, supplements or other agreements, if any, with respect thereto) of all real property leased, subleased or licensed by Transatlantic or any of its Subsidiaries (collectively, the “Transatlantic Leased Real Properties”; and the leases, subleases and licenses with respect thereto, collectively, the “Transatlantic Real Property Leases”). Transatlantic has delivered or otherwise made available to Allied World true, correct and complete copies of the Transatlantic Real Property Leases, together with all amendments, extensions, renewals, guaranties, modifications, supplements or other agreements, if any, with respect thereto. Each of the Transatlantic Real Property Leases is in full force and effect. Transatlantic or one of its Subsidiaries has a valid, binding and enforceable leasehold or subleasehold interest (or license, as applicable) in each Transatlantic Leased Real Property, in each case as to such leasehold or subleasehold interest (or license, as applicable), free and clear of all Liens (other than Permitted Liens). Neither Transatlantic nor any of its Subsidiaries owns any real property or any interests in real property.

          4.14 Opinion of Financial Advisor. The Transatlantic Board has received the opinion of Moelis & Co. LLC (“Moelis”), dated as of the date of this Agreement and addressed to the Transatlantic Board, to the effect that, as of such date and based upon and subject to the limitations, qualifications and assumptions set forth therein, the Exchange Ratio is fair, from a financial point of view, to the holders of shares of Transatlantic Common Stock (the “Moelis Fairness Opinion”). Transatlantic has been authorized by Moelis to permit the inclusion of the Moelis Fairness Opinion and references thereto in the Joint Proxy Statement/Prospectus, subject to prior review and consent by Moelis.

     4.15 Taxes.

               (a) All material Tax Returns required by applicable Law to be filed with any Taxing Authority by, or on behalf of, Transatlantic or any of its Subsidiaries have been duly filed when due (including extensions) in accordance with all applicable Laws, and all such Tax Returns are true, correct and complete in all material respects.

               (b) Transatlantic and each of its Subsidiaries has duly and timely paid or has duly and timely withheld and remitted to the appropriate Taxing Authority all material Taxes due and payable, or, where payment is not yet due, has established in accordance with the applicable accounting standard an adequate accrual for all material Taxes on the most recent financial statements contained in the Transatlantic SEC Documents and on the Transatlantic Statutory Statements.

               (c) There is no claim, audit, action, suit, request for written ruling, proceeding or investigation pending or threatened in writing against or with respect to Transatlantic or any of its Subsidiaries in respect of any Tax or Tax Return which (except in the case of a request for a written ruling) if determined adversely would, individually or in the aggregate, be expected to result in a material Tax deficiency.

               (d) Transatlantic and each of its Subsidiaries has withheld all material amounts required to have been withheld by it in connection with amounts paid or owed to any employee, independent contractor, creditor, shareholder or any other third party; such withheld

amounts were either duly paid to the appropriate Taxing Authority or set aside in accounts for such purpose. Transatlantic and each of its Subsidiaries has reported such withheld amounts to the appropriate Taxing Authority and to each such employee, independent contractor, creditor, shareholder or any other third party, as required under applicable Law.

               (e) Neither Transatlantic nor any of its Subsidiaries is liable for any Taxes of any Person (other than Transatlantic and its Subsidiaries) as a result of being (i) a transferee or successor of such Person, (ii) a member of an affiliated, consolidated, combined or unitary group that includes such Person as a member or (iii) a party to a tax sharing, tax indemnity or tax allocation agreement or any other agreement to indemnify such Person.

               (f) Neither Transatlantic nor any of its Subsidiaries shall be required to include any item of income in, or exclude any item of deduction from, taxable income for any period (or portion thereof) ending after the Closing Date, as a result of (1) any change in method of accounting for a taxable period ending on or prior to the Closing Date under Section 481 of the Code (or any corresponding provision of state, local or foreign Law), (2) “closing agreement” as described in Section 7121 of the Code (or any corresponding or similar provision of state, local or foreign Tax Law) executed on or prior to the Closing Date, (3) intercompany transaction or excess loss account described in Treasury Regulations under Section 1502 of the Code (or any corresponding or similar provision of state, local or foreign Tax Law), (4) installment sale or open transaction made on or prior to the Closing Date, or (5) prepaid amount received on or prior to the Closing Date.

               (g) Neither Transatlantic nor any of its Subsidiaries has participated or engaged in any “reportable transaction” within the meaning of Treasury Regulations Section 1.6011-4 (or any corresponding or similar provision of state, local or foreign Tax Law). Neither Transatlantic nor any of its Subsidiaries is a party to any understanding or arrangement described in Section 6662(d)(2)(C)(ii) of the Code or Treasury Regulations Section 1.6011-4(b) or is a material advisor as defined in Section 6111(b) of the Code.

               (h) Neither Transatlantic nor any of its Subsidiaries has been informed by any Taxing Authority in any jurisdiction in which it does not file a Tax Return that it may be required to file a Tax Return in such jurisdiction.

               (i) Neither Transatlantic nor any of its Subsidiaries has distributed stock of another corporation, or has had its stock distributed by another corporation, in a transaction that was governed, or purported or intended to be governed or described, in whole or in part, by Section 355 or Section 368(a)(1)(D) of the Code.

     4.16 Employee Benefit Plans.

               (a) Section 4.16(a) of the Transatlantic Disclosure Schedule sets forth as of the date of this Agreement a true and complete list of each material “employee benefit plan” (within the meaning of Section 3(3) of ERISA), multiemployer plans within the meaning of ERISA Section 3(37), and all material stock purchase, stock option, severance, employment, change-in-control, fringe benefit, bonus, incentive, deferred compensation and all other employee benefit plans, agreements, programs, policies or other arrangements, whether or not

subject to ERISA (including any funding mechanism therefor now in effect or required in the future as a result of the transactions contemplated by this Agreement or otherwise), whether formal or informal, written, legally binding or not, under which any employee or former employee of Transatlantic or its Subsidiaries has any present or future right to benefits or Transatlantic or its Subsidiaries has had or has any present or future liability (each, a “Transatlantic Benefit Plan”). With respect to each such Transatlantic Benefit Plan, Transatlantic has made available to Allied World a true and complete copy of such Transatlantic Benefit Plan, if written, or a description of the material terms of such Transatlantic Benefit Plan if not written, and to the extent applicable, (i) all trust agreements, Insurance Contracts or other funding arrangements; (ii) the most recent actuarial and trust reports for both ERISA funding and financial statement purposes; (iii) the most recent Form 5500 with all attachments required to have been filed with the IRS or the Department of Labor or any similar reports filed with any comparable Governmental Entity in any non-U.S. jurisdiction having jurisdiction over any Transatlantic Benefit Plan and all schedules thereto; (iv) the most recent IRS determination or opinion letter; and (v) all current summary plan descriptions.

               (b) (i) Each Transatlantic Benefit Plan has been maintained in all material respects in accordance with its terms and the requirements of applicable Law, (ii) each of Transatlantic and its Subsidiaries has performed all material obligations required to be performed by it under any Transatlantic Benefit Plan and, to the knowledge of Transatlantic, is not in any material respect in default under or in violation of any Transatlantic Benefit Plan and (iii) no action (other than claims for benefits in the ordinary course) is pending or threatened in writing with respect to any Transatlantic Benefit Plan by any current or former employee, officer or director of Transatlantic or any of its Subsidiaries that would reasonably be expected to have a Transatlantic Material Adverse Effect.

               (c) Each Transatlantic Benefit Plan that is intended to be qualified under Section 401(a) of the Code has received a determination or opinion letter from the IRS that it is so qualified and each related trust that is intended to be exempt from federal income taxation under Section 501(a) of the Code has received a determination or opinion letter from the IRS that it is so exempt and, to the knowledge of Transatlantic, no fact or event has occurred since the date of such letter or letters from the IRS that would reasonably be expected to adversely affect the qualified status of any such Transatlantic Benefit Plan or the exempt status of any such trust.

               (d) No liability under Subtitle C or D of Title IV of ERISA has been or is reasonably expected to be incurred by Transatlantic or any of its Subsidiaries with respect to any ongoing, frozen or terminated “single-employer plan,” within the meaning of Section 4001(a)(15) of ERISA, currently or formerly maintained by any of them, or the single-employer plan of any entity which is considered one employer with Transatlantic under Section 4001 of ERISA or Section 414 of the Code (a “Transatlantic ERISA Affiliate”). Transatlantic and its Subsidiaries have no liability (contingent or direct) with respect to any multiemployer plan under Subtitle E of Title IV of ERISA (regardless of whether based on contributions of a Transatlantic ERISA Affiliate) and no such liability is reasonably expected to be incurred by Transatlantic or its Subsidiaries. No notices have been required to be sent to participants and beneficiaries or to the PBGC under Section 302 of ERISA or Section 412 or Section 430 of the Code.

               (e) All material contributions required to be made under each Transatlantic Benefit Plan, as of the date hereof, have been timely made. Neither any Transatlantic Benefit Plan nor any single-employer plan of a Transatlantic ERISA Affiliate has failed to satisfy the minimum funding standard within the meaning of Section 412 of the Code or Section 302 of ERISA. It is not reasonably anticipated that any Transatlantic Benefit Plan is, or is expected to be, in “at-risk” status (as defined in Section 430 of the Code or Section 303 of ERISA). Transatlantic has no liability pursuant to Section 4069 of ERISA.

               (f) Neither Transatlantic nor any of its Subsidiaries has any material liability in respect of post-retirement health, medical or life insurance benefits for retired, former or current employees of Transatlantic or its Subsidiaries, except as required by applicable Law. Transatlantic has reserved the right to amend, terminate or modify at any time all Transatlantic Benefit Plans providing for retiree health or life insurance coverage or other retiree death benefits, and there have been no communications to employees or former employees which could reasonably be interpreted to promise or guarantee such employees or former employees retiree health or life insurance or other retiree death benefits on a permanent basis.

               (g) Any arrangement of Transatlantic or any of its Subsidiaries that is subject to Section 409A of the Code was administered in reasonable, good faith compliance with the requirements of Section 409A through December 31, 2008, and all arrangements of Transatlantic or any of its Subsidiaries that are subject to Section 409A, provide for payment after December 31, 2008 and were in existence on such date have been amended to comply with the requirements of the final regulations under Section 409A, in each case except as would not, individually or in the aggregate, reasonably be expected to have a Transatlantic Material Adverse Effect. Neither Transatlantic nor any of its Subsidiaries has any obligation to provide any gross-up payment to any individual with respect to any income Tax, additional Tax, excise Tax or interest charge imposed pursuant to Section 409A or 4999 of the Code.

               (h) Except as set forth in Section 4.16(h) of the Transatlantic Disclosure Schedule, the consummation of the transactions contemplated hereby to which Transatlantic is a party, will not, either alone or in combination with another event, (i) entitle any current or former director, officer or employee of Transatlantic or of any of its Subsidiaries to severance pay, unemployment compensation or any other payment; (ii) result in any payment becoming due, accelerate the time of payment or vesting, or increase the amount of compensation due to any such director, officer or employee; (iii) result in any forgiveness of indebtedness, trigger any funding obligation under any Transatlantic Benefit Plan or impose any restrictions or limitations on Transatlantic’s rights to administer, amend or terminate any Transatlantic Benefit Plan; or (iv) result in any payment (whether in cash or property or the vesting of property) to any “disqualified individual” (as such term is defined in Treasury Regulations Section 1.280G-1) that could reasonably be expected, individually or in combination with any other such payment, to constitute an “excess parachute payment” (as defined in Section 280G(b)(1) of the Code).

     4.17 Employees, Labor Matters.

               (a) Neither Transatlantic nor any of its Subsidiaries is a party to or bound by any collective bargaining agreement, and there are no labor unions or other organizations

representing, purporting to represent or, to the knowledge of Transatlantic, attempting to represent any employees of Transatlantic or any of its Subsidiaries in their capacity as such.

               (b) Since January 1, 2008, there has not occurred or been threatened in writing any material strike, slowdown, work stoppage, concerted refusal to work overtime or other similar labor activity or union organizing campaign with respect to any employees of Transatlantic or any of its Subsidiaries. There are no labor disputes subject to any formal grievance procedure, arbitration or litigation and there is no representation petition pending or threatened in writing with respect to any employee of Transatlantic or any of its Subsidiaries.

               (c) Transatlantic and its Subsidiaries have been in compliance with all applicable Laws relating to employment of labor, including all applicable Laws relating to wages, hours, collective bargaining, employment discrimination, civil rights, safety and health, workers’ compensation, pay equity, classification of employees, and the collection and payment of withholding and/or social security Taxes, except where noncompliance would not reasonably be expected to result in a Transatlantic Material Adverse Effect.

          4.18 Environmental Matters. Except as would not, individually or in the aggregate, reasonably be expected to have a Transatlantic Material Adverse Effect, (a) neither Transatlantic nor any of its Subsidiaries has received any written notice, demand, request for information, citation, summons or Order, and no complaint has been filed, no penalty has been assessed, no liability has been incurred, and no investigation, action, written claim, suit or proceeding is pending or is threatened in writing by any Governmental Entity or other Person with respect to or arising out of any applicable Environmental Law and (b) no “release” of a “hazardous substance” (as those terms are defined in the Comprehensive Environmental Response, Compensation, and Liability Act, 42 U.S.C. § 9601 et seq.) has occurred at, on, above, under or from any properties currently or formerly owned, leased, operated or used by Transatlantic, any Transatlantic Subsidiary or any predecessors in interest that are reasonably likely to result in any cost, liability or obligation of Transatlantic or any Transatlantic Subsidiary under any applicable Environmental Law.

     4.19 Intellectual Property.

               (a) Each of Transatlantic and its Subsidiaries owns or otherwise has a valid and enforceable license or right to use material Intellectual Property used in the respective businesses of Transatlantic and each of its Subsidiaries as currently conducted; and all patents and all registrations for trademarks, service marks and copyrights owned by Transatlantic or its Subsidiaries are valid and subsisting, except to the extent Transatlantic or its Subsidiaries have determined to abandon such patents or registrations for trademarks, service marks and copyrights in the exercise of their reasonable business judgment.

               (b) There are no claims pending or threatened in writing by any Person alleging that Transatlantic or its Subsidiaries or their respective businesses as conducted on the date of this Agreement infringes the Intellectual Property of any Person, which, if determined or resolved adversely against Transatlantic or any Transatlantic Subsidiary, would, individually or in the aggregate, reasonably be expected to be material to Transatlantic and its Subsidiaries, taken as a whole. To the knowledge of Transatlantic, no Person is infringing the Intellectual

Property owned by Transatlantic or any of its Subsidiaries, which infringement would, individually or in the aggregate, reasonably be expected to be material to Transatlantic and its Subsidiaries, taken as a whole.

               (c) Transatlantic and its Subsidiaries have established and are in compliance with commercially reasonable security programs that are sufficient to protect (i) the security, confidentiality and integrity of transactions executed through their computer systems, including encryption and/or other security protocols and techniques when appropriate; and (ii) the security, confidentiality and integrity of all confidential or proprietary data, except, in each case, which would not, individually or in the aggregate, reasonably be expected to have a Transatlantic Material Adverse Effect. Neither Transatlantic nor any of its Subsidiaries has suffered a material security breach with respect to their data or systems, and neither Transatlantic nor any of its Subsidiaries has notified customers or employees of any information security breach. Transatlantic and its Subsidiaries take reasonable steps to protect their material trade secrets and none of such trade secrets have been disclosed to any Person except pursuant to written and enforceable confidentiality obligations.

     4.20 Transatlantic Material Contracts.

               (a) Transatlantic has made available to Allied World a true and complete copy of each Contract to which Transatlantic or any of its Subsidiaries is a party as of the date of this Agreement or by which Transatlantic, any of its Subsidiaries or any of its respective properties or assets is bound as of the date of this Agreement, which: (i) is a “material contract” within the meaning of Item 601(b)(10) of Regulation S-K promulgated by the SEC (each, a “Transatlantic Material Contract”); (ii) contains covenants of Transatlantic or any of its Subsidiaries not to compete or engage in any line of business or compete with any Person in any geographic area; (iii) pursuant to which Transatlantic or any of its Subsidiaries has entered into a partnership or joint venture with any other Person (other than Transatlantic or any of its Subsidiaries); (iv) relates to or evidences indebtedness for borrowed money or any guarantee of indebtedness for borrowed money by Transatlantic or any of its Subsidiaries in excess of ten million dollars ($10,000,000); or (v) evidences any guarantee of obligations of any Person other than a wholly owned Subsidiary of Transatlantic in excess of ten million dollars ($10,000,000).

               (b) Each Transatlantic Material Contract is (assuming due power and authority of, and due execution and delivery by the parties thereto other than Transatlantic or any of its Subsidiaries) a valid and binding obligation of Transatlantic or its Subsidiaries party thereto, subject to the Bankruptcy and Equity Exception, except (i) to the extent it has previously expired or terminated in accordance with their terms and (ii) for any failures to be valid and binding which would not, individually or in the aggregate, reasonably be expected to have a Transatlantic Material Adverse Effect. Neither Transatlantic nor any of its Subsidiaries nor, to the knowledge of Transatlantic, any other party to any Transatlantic Material Contract is in breach of or in default under any Transatlantic Material Contract, and, to the knowledge of Transatlantic, no event has occurred that, with the lapse of time or the giving of notice or both, would constitute a default thereunder by any party thereto, and neither Transatlantic nor any of its Subsidiaries has received any claim of any such breach or default, except for such breaches and defaults which would not, individually or in the aggregate, reasonably be expected to have a Transatlantic Material Adverse Effect.

          4.21 Brokers’ and Finders’ Fees. Except for Moelis and Goldman Sachs & Co., the fees and expenses of which will be paid by Transatlantic, there is no investment banker, broker, finder or other intermediary that has been retained by or is authorized to act on behalf of Transatlantic or any of its Subsidiaries who is entitled to any fee or commission from Transatlantic or any of its Subsidiaries in connection with the transactions to which Transatlantic is a party contemplated hereby.

          4.22 Takeover Laws. No “fair price,” “moratorium,” “control share acquisition,” “interested stockholder” or other anti-takeover statute or regulation is applicable to this Agreement, the Merger or the other transactions contemplated hereby by reason of Transatlantic being a party to this Agreement, performing its obligations hereunder and consummating the Merger and the other transactions contemplated hereby.

          4.23 Affiliate Transactions. There are no transactions, agreements, arrangements or understandings between (i) Transatlantic or any of its Subsidiaries, on the one hand, and (ii) any directors, officers or stockholders of Transatlantic, on the other hand, of the type that would be required to be disclosed under Item 404 of Regulation S-K promulgated under the Securities Act.

          4.24 Insurance Subsidiaries. Each Transatlantic Subsidiary that conducts the business of reinsurance (each, a “Transatlantic P/C Subsidiary”) is (i) duly licensed or authorized as a reinsurance company in its jurisdiction of incorporation; (ii) duly licensed, authorized or otherwise eligible to transact the business of reinsurance in each other jurisdiction where it is required to be so licensed, authorized or eligible in order to conduct its business as currently conducted; and (iii) duly licensed, authorized or eligible in its jurisdiction of incorporation and each other applicable jurisdiction where it writes each line of reinsurance reported as being written in the Transatlantic Statutory Statements. Each jurisdiction in which any Transatlantic P/C Subsidiary is domiciled or commercially domiciled or otherwise licensed, authorized or eligible with respect to the conduct of the business of reinsurance is set forth in Section 4.24 of the Transatlantic Disclosure Schedule.

     4.25 Statutory Statements; Examinations.

               (a) Since January 1, 2008, each of the Transatlantic P/C Subsidiaries has timely filed or submitted all material annual and, to the extent applicable Law requires, quarterly and other periodic statements, together with all exhibits, interrogatories, notes, schedules and any actuarial opinions, affirmations or certifications or other supporting documents in connection therewith, required to be filed with or submitted to the appropriate insurance regulatory authorities of each jurisdiction in which it is licensed, authorized or eligible on forms prescribed or permitted by such authority (as filed through the date hereof and thereafter, collectively, the “Transatlantic Statutory Statements”), except, in each case, as has been cured or resolved to the satisfaction of such insurance regulatory authority without imposition of any material penalty.

               (b) Transatlantic has delivered or made available to Allied World, to the extent permitted by applicable Law, true and complete copies of all annual Transatlantic Statutory Statements filed with Governmental Entities for each of the Transatlantic P/C Subsidiaries for the periods beginning January 1, 2008, each in the form (including exhibits,

annexes and any amendments thereto) filed with the applicable insurance regulatory authority. Financial statements included in the Transatlantic Statutory Statements were prepared in conformity with applicable SAP, consistently applied for the periods covered thereby, were prepared in accordance with the books and records of the applicable Transatlantic P/C Subsidiary, and present fairly in all material respects the statutory financial position of the relevant Transatlantic P/C Subsidiary as of the respective dates thereof and the results of operations, cash flows, and changes in capital and surplus (or stockholders’ equity, as applicable) of such Transatlantic P/C Subsidiary for the respective periods then ended. The Transatlantic Statutory Statements complied in all material respects with all applicable Laws when filed or submitted and no material violation or deficiency has been asserted in writing (or, to the knowledge of Transatlantic, orally) by any Governmental Entity with respect to any of the Transatlantic Statutory Statements that have not been cured or otherwise resolved to the satisfaction of such Governmental Entity. The statutory balance sheets and income statements included in the annual Transatlantic Statutory Statements have been audited by Transatlantic’s independent auditors, and Transatlantic has delivered or made available to Allied World true and complete copies of all audit opinions related thereto for the periods beginning January 1, 2008 through the date hereof, in each case as filed with the insurance regulatory authority of the jurisdiction of domicile of such Transatlantic P/C Subsidiary. Except as is indicated therein, all assets that are reflected on the Transatlantic Statutory Statements comply in all material respects with all applicable Insurance Laws regulating the investments of Transatlantic P/C Subsidiaries and all applicable Insurance Laws with respect to admitted assets. The financial statements included in the Transatlantic Statutory Statements accurately reflect in all material respects the extent to which, pursuant to applicable Laws and applicable SAP, the applicable Transatlantic P/C Subsidiary is entitled to take credit for reinsurance (or any local equivalent concept) on such Transatlantic Statutory Statements.

               (c) Transatlantic has delivered or made available to Allied World, to the extent permitted by applicable Law, true and complete copies of all examination reports (and has notified the other party of any pending examinations) of any insurance regulatory authorities received by it on or after January 1, 2008 through the date hereof relating to the Transatlantic P/C Subsidiaries. Except as set forth in Section 4.25(c) of the Transatlantic Disclosure Schedule, all material deficiencies or violations noted in the examination reports have been resolved to the reasonable satisfaction of the insurance regulatory authority that noted such deficiencies or violations.

               (d) Section 4.25(d) of the Transatlantic Disclosure Schedule sets forth a true and complete list of permitted practices under SAP that are used in any of the Transatlantic Statutory Statements of any Transatlantic P/C Subsidiary.

          4.26 Agreements with Regulators. Except as required by Insurance Laws and the reinsurance licenses maintained by the Transatlantic P/C Subsidiaries or as set forth in Section 4.26 of the Transatlantic Disclosure Schedule, there are no written agreements, memoranda of understanding, commitment letters or similar undertakings binding on it or any of its subsidiaries or to which Transatlantic or any Transatlantic Subsidiaries is a party, on the one hand, and any Governmental Entity is a party or addressee, on the other hand, or any Orders or directives by, or supervisory letters or cease-and-desist orders from, any Governmental Entity, neither has Transatlantic nor any Transatlantic Subsidiary adopted

any board resolution at the request of any Governmental Entity, in each case specifically with respect to Transatlantic or any Transatlantic Subsidiary, which (a) limit the ability of Transatlantic or any Transatlantic P/C Subsidiary to issue or enter into Transatlantic Reinsurance Contracts or other material reinsurance or retrocession treaties or agreements, slips, binders, cover notes or other similar arrangements; (b) require any divestiture of any investment of any Transatlantic Subsidiary; (c) in any manner relate to the ability of any Transatlantic Subsidiary to pay dividends; (d) require any investment of any Transatlantic P/C Subsidiary to be treated as non-admitted assets (or the local equivalent); or (e) otherwise restrict the conduct of business of Transatlantic or any Transatlantic Subsidiary, nor has it been advised in writing by any Governmental Entity that it is contemplating any such undertakings.

     4.27 Reinsurance and Retrocession.

               (a) As of the date of this Agreement, all material reinsurance or retrocession treaties or agreements, slips, binders, cover notes or other similar arrangements pursuant to which any Transatlantic P/C Subsidiary is the cedent (the “Transatlantic Reinsurance Contracts”) are, and after the consummation of the transactions contemplated hereby will continue to be, valid and binding obligations of Transatlantic and the Transatlantic Subsidiaries (to the extent they are parties thereto or bound thereby) and, to Transatlantic’s knowledge, each other party thereto, in accordance with their terms and are in full force and effect, and Transatlantic and the Transatlantic Subsidiaries (to the extent they are party thereto or bound thereby) and, to Transatlantic’s knowledge, each other party thereto has performed in all material respects all obligations required to be performed by it under each Transatlantic Reinsurance Contract. Neither Transatlantic nor any of the Transatlantic Subsidiaries has received notice, nor does it have knowledge, of any violation or default in respect of any material obligation under (or any condition which, with the passage of time or the giving of notice or both, would result in such a violation or default), or any intention to cancel, terminate or change the scope of rights and obligations under, or not to renew, any Transatlantic Reinsurance Contract. Since January 1, 2008, (i) neither Transatlantic nor the Transatlantic Subsidiaries have received any written notice from any party to a Transatlantic Reinsurance Contract that any amount of reinsurance ceded by Transatlantic or such Transatlantic Subsidiary to such counterparty will be uncollectible or otherwise defaulted upon; (ii) to Transatlantic’s knowledge, no party to a Transatlantic Reinsurance Contract is insolvent or the subject of a rehabilitation, liquidation, conservatorship, receivership, bankruptcy or similar proceeding; (iii) to Transatlantic’s knowledge, the financial condition of any party to a Transatlantic Reinsurance Contract is not impaired to the extent that a default thereunder is reasonably anticipated; (iv) there are no material disputes under any Transatlantic Reinsurance Contract other than disputes in the ordinary course for which adequate loss reserves have been established; and (v) Transatlantic’s relevant Transatlantic P/C Subsidiary is entitled under any applicable Law and applicable SAP to take full credit in its Transatlantic Statutory Statements for all amounts recoverable by it pursuant to any Transatlantic Reinsurance Contract and all such amounts recoverable have been properly recorded in its books and records of account (if so accounted therefor) and are properly reflected in the Transatlantic Statutory Statements, except for such events or circumstances as have not been and would not reasonably be expected to be, individually or in the aggregate, material to Transatlantic and its Subsidiaries, taken as a whole.

          (b) Except for such events or circumstances as have not been and would not reasonably be expected to be, individually or in the aggregate, material to Allied World and its Subsidiaries, taken as a whole, with respect to any Transatlantic Reinsurance Contract for which a Transatlantic P/C Subsidiary as ceding insurer thereto is taking credit on its most recent Transatlantic Statutory Statements, to its knowledge, from and after January 1, 2008 (i) there has been no separate written or oral agreement between such Transatlantic P/C Subsidiary and the assuming reinsurer that would under any circumstances reduce, limit, mitigate or otherwise affect any actual or potential loss to the parties under any such Transatlantic Reinsurance Contract, other than inuring contracts that are explicitly defined in any such Transatlantic Reinsurance Contract; (ii) for each such Transatlantic Reinsurance Contract entered into, renewed or amended on or after January 1, 2008, for which risk transfer is not reasonably considered to be self-evident to the extent required by any applicable provisions of SSAP No. 62, documentation concerning the economic intent of the transaction and the risk transfer analysis evidencing the proper accounting treatment is available for review by the relevant Governmental Entities for such Transatlantic P/C Subsidiary; (iii) the Transatlantic P/C Subsidiary that is a party thereto, and to its knowledge, any other party thereto, complies and has complied from and after January 1, 2008 with any applicable requirements set forth in SSAP No. 62; and (iv) such Transatlantic P/C Subsidiary has and has had since January 1, 2008 appropriate controls in place to monitor the use of reinsurance and comply with the provisions of SSAP No. 62.

          4.28 Rating Agency. Since December 31, 2010, no rating agency has imposed conditions (financial or otherwise) on retaining any currently held rating assigned to any Transatlantic P/C Subsidiary or, to the knowledge of Transatlantic, stated to Transatlantic that it is considering lowering any rating assigned to any Transatlantic P/C Subsidiary or placing any Transatlantic P/C Subsidiary on an “under review” status, except as set forth in Section 4.28 of the Transatlantic Disclosure Schedule. As of the date of this Agreement, each U.S. Transatlantic P/C Subsidiary has the A.M. Best Company rating set forth in Section 4.28 of the Transatlantic Disclosure Schedule.

     4.29 Reserves.

               (a) The insurance policy reserves for claims, losses (including incurred but not reported losses), loss adjustment expenses (whether allocated or unallocated) and unearned premium of each Transatlantic P/C Subsidiary contained in its Transatlantic Statutory Statements (i) were determined in all material respects in accordance with generally accepted actuarial standards consistently applied (except as otherwise noted in the financial statements and notes thereto included in such financial statements) and (ii) satisfied the requirements of all applicable Insurance Laws in all material respects.

               (b) Transatlantic has made available to Allied World true and complete copies of all material actuarial reports prepared by actuaries, independent or otherwise, from and after January 1, 2008, with respect to the Transatlantic P/C Subsidiaries, and all material attachments, addenda, supplements and modifications thereto. There have been no actuarial reports of a similar nature covering any Transatlantic P/C Subsidiary in respect of any period subsequent to the latest period covered in such actuarial reports. The information and data furnished by Transatlantic and the Transatlantic Subsidiaries to its independent actuaries in connection with

the preparation of such actuarial reports were accurate in all material respects for the periods covered in such reports.

          4.30 Risk-Based Capital. Transatlantic has made available to Allied World true and complete copies of all analyses and reports submitted by Transatlantic to any insurance regulatory authority during the past twenty-four (24) months relating to risk-based capital calculations (“Transatlantic Risk-Based Capital Reports”). The Transatlantic Risk-Based Capital Reports were true and accurate in all material respects at the time of submission.

     4.31 Transatlantic Insurance Business.

               (a) All underwriting, management and administration agreements entered into by any Transatlantic P/C Subsidiary are, to the extent required by Law, in forms acceptable to all applicable insurance departments or have been filed with and approved by all applicable insurance departments or were not objected to by any such insurance department within any period provided for objection.

               (b) Since December 31, 2010, (i) salaried employees of Transatlantic and the Transatlantic Subsidiaries and, to the knowledge of Transatlantic, each other Person, who, in each of the foregoing cases, is performing the duties of reinsurance intermediary for Transatlantic and the Transatlantic Subsidiaries (collectively, “Transatlantic Agents”), at the time such Transatlantic Agent wrote, sold or produced business for or on behalf of Transatlantic or any Transatlantic Subsidiary that requires a license, was duly licensed and appointed as required by applicable Law, in the particular jurisdiction in which such Transatlantic Agent wrote, sold or produced business, and to the knowledge of Transatlantic, no Transatlantic Agent is in violation of (or with or without notice or lapse of time or both, would have violated) any term or provision of any Law applicable to the writing, sale, production or solicitation of insurance or other business for or on behalf of Transatlantic or any Transatlantic Subsidiary, except for such failures to be so licensed or such violations which have been cured, which have been resolved or settled through agreements with applicable Governmental Entity, or which are barred by an applicable statute of limitations, and (ii) each of the agency agreements and appointments between the Transatlantic Agents, including as subagents under Transatlantic’s affiliated insurance agency, and Transatlantic and any Transatlantic Subsidiary, is valid and binding and in full force and effect in accordance with its terms, except as would not, individually or in the aggregate, reasonably be expected to have a Transatlantic Material Adverse Effect. As of the date of this Agreement, no Transatlantic Agent individually accounting for 1% or more of the total gross premiums of all Transatlantic Subsidiaries for the year ended December 31, 2010 has notified Transatlantic or any Transatlantic Subsidiary that such Transatlantic Agent will be unable in any material respect or unwilling to continue its relationship as a Transatlantic Agent with Transatlantic or any Transatlantic Subsidiary within twelve (12) months after the date hereof.

          4.32 Other Transatlantic Insurance Business. Since December 31, 2010, (i) each Transatlantic Subsidiary and the salaried employees of Transatlantic and the Transatlantic Subsidiaries, who, in each of the foregoing cases, is performing the duties of insurance producer or reinsurance intermediary for any Person that is not an Affiliate of

Transatlantic (collectively, “Transatlantic Insurance Intermediaries”), at the time such Transatlantic Insurance Intermediaries wrote, sold or produced business for or on behalf of any Person that is not an Affiliate of Transatlantic that requires a license, was duly licensed and appointed as required by applicable Law, in the particular jurisdiction in which such Transatlantic Insurance Intermediary wrote, sold or produced, and to the knowledge of Transatlantic, no Transatlantic Insurance Intermediary is in violation of (or with or without notice or lapse of time or both, would have violated) any term or provision of any Law applicable to the writing, sale or production for or on behalf of any Person that is not an Affiliate of Transatlantic, except for such failures to be so licensed or such violations which have been cured, which have been resolved or settled through agreements with applicable Governmental Entity, or which are barred by an applicable statute of limitations, and (ii) each of the agency agreements and appointments between the Transatlantic Insurance Intermediary and any such Person that is not an Affiliate of Transatlantic, is valid and binding and in full force and effect in accordance with its terms, except as would not, individually or in the aggregate, reasonably be expected to have a Transatlantic Material Adverse Effect.

     4.33 No Other Representations and Warranties; Disclaimer.

               (a) Except for the representations and warranties made by Transatlantic in this Article IV, neither Transatlantic nor any other Person makes any express or implied representation or warranty with respect to Transatlantic or any of its Subsidiaries or their respective businesses, operations, assets, liabilities, condition (financial or otherwise) or prospects, and Transatlantic hereby disclaims any such other representations or warranties. In particular, without limiting the foregoing disclaimer, except for the representations and warranties made by Transatlantic in this Article IV, neither Transatlantic nor any other Person makes or has made any representation or warranty to Allied World, Merger Sub or any of their Affiliates or Representatives with respect to (i) any financial projection, forecast, estimate, budget or prospective information relating to Transatlantic, any of its Subsidiaries or their respective businesses or operations or (ii) any oral or written information presented to Allied World, Merger Sub or any of their Affiliates or Representatives in the course of their due diligence investigation of Transatlantic, the negotiation of this Agreement or in the course of the transactions contemplated hereby.

               (b) Notwithstanding anything contained in this Agreement to the contrary, Transatlantic acknowledges and agrees that neither Allied World, Merger Sub, nor any other Person has made or is making any representations or warranties whatsoever, express or implied, beyond those expressly given by Allied World and Merger Sub in Article III hereof, including any implied representation or warranty as to the accuracy or completeness of any information regarding Allied World or Merger Sub furnished or made available to Transatlantic or any of its Affiliates or Representatives. Without limiting the generality of the foregoing, Transatlantic acknowledges and agrees that no representations or warranties are made with respect to any projections, forecasts, estimates, budgets or prospect information that may have been made available to Transatlantic or any of its Affiliates or Representatives.

ARTICLE V.
COVENANTS RELATING TO CONDUCT OF BUSINESS

          5.1 Conduct of Businesses Prior to the Effective Time. During the period from the date of this Agreement to the Effective Time, except as expressly contemplated or permitted by this Agreement (including by Section 5.2 or Section 5.3 below, as applicable), except as specifically set forth in Section 5.1 of the Allied World Disclosure Schedule or Section 5.1 of the Transatlantic Disclosure Schedule, as applicable, and except with the prior written consent of the other party (which shall not be unreasonably withheld, conditioned or delayed), each of Allied World and Transatlantic shall, and shall cause each of its respective Subsidiaries to (i) conduct its business in the ordinary course consistent with past practice in all material respects, (ii) use commercially reasonable efforts to maintain and preserve intact its business organization and advantageous business relationships and retain the services of its officers and key employees, and (iii) take no action that would prohibit or materially impair or delay the ability of either Allied World or Transatlantic to obtain any necessary approvals of any regulatory agency or other Governmental Entity required for the transactions contemplated hereby or to consummate the transactions contemplated hereby. Notwithstanding the foregoing provisions of this Section 5.1, (i) neither party will take any action prohibited by Section 5.2 or Section 5.3, as applicable, in order to satisfy such party’s obligations under this Section 5.1 and (ii) each party shall be deemed not to have failed to satisfy its obligations under this Section 5.1 to the extent such failure resulted, directly or indirectly, from such party’s failure to take any action prohibited by Section 5.2 or Section 5.3, as applicable.

          5.2 Allied World Forbearances. During the period from the date of this Agreement to the Effective Time, except as set forth in Section 5.2 of the Allied World Disclosure Schedule and except as required by Law or the rules and regulations of the SEC or the NYSE or as expressly contemplated or permitted by this Agreement, Allied World will not, and will not permit any of the Allied World Subsidiaries to, without the prior written consent of Transatlantic (which shall not be unreasonably withheld, conditioned or delayed):

               (a) amend its Organizational Documents (whether by merger, consolidation or otherwise);

               (b) (i) split, combine or reclassify any shares of its capital stock, or propose to split, combine or reclassify, any of its share capital, or issue or authorize or propose the issuance or authorization of any other securities in respect of, or in lieu of or in substitution for, shares of its share capital, (ii) declare, set aside or pay any dividend or other distribution (whether in cash, stock or property or any combination thereof) in respect of its capital stock, except dividends paid by a direct or indirect wholly owned Subsidiary of Allied World to Allied World or to any of Allied World’s other direct or indirect wholly owned Subsidiaries (to the extent that any such dividends do not result in any Subsidiary of Allied World breaching or otherwise violating any applicable regulatory capital requirements or becoming subject to any additional regulatory oversight or reporting requirements) or (iii) redeem, repurchase or otherwise acquire or offer to redeem, repurchase, or otherwise acquire any shares of Allied World’s (or any of its Subsidiaries’) share capital or any securities convertible into or exercisable for any shares of

Allied World’s (or any of its Subsidiaries’) share capital, other than repurchases, redemptions or acquisitions by Allied World or any wholly owned Subsidiary of Allied World of share capital or such other securities, as the case may be, of any other wholly owned Subsidiary of Allied World;

          (c) (i) issue, deliver, pledge or sell, or authorize the issuance, delivery or sale of, any Allied World Shares, Equity Equivalents or shares of capital stock of any Allied World Subsidiary, other than the issuance of (A) any Allied World Shares upon the exercise of Allied World Stock-Based Awards that are outstanding on the date of this Agreement in accordance with the terms of the Allied World Stock Plans on the date of this Agreement and (B) any capital stock of any Allied World Subsidiary to Allied World or any other Allied World Subsidiary or (ii) amend any term of any Allied World Shares or Equity Equivalent (in each case, whether by merger, consolidation or otherwise);

          (d) incur any capital expenditures or any obligations or liabilities in respect thereof, except for (i) those contemplated by the capital expenditure budget set forth in Section 5.2(d) of the Allied World Disclosure Schedule and (ii) any unbudgeted capital expenditures not to exceed $1,000,000 individually or $2,500,000 in the aggregate;

          (e) acquire (by merger, consolidation, acquisition of stock or assets or otherwise), directly or indirectly, any assets, securities, properties, interests or businesses, other than (i) supplies, equipment and investment securities or other assets in bona fide transactions, on arm’s-length terms in the ordinary course of business of Allied World and its Subsidiaries in a manner that is consistent with past practice and/or (ii) acquisitions with a purchase price net of the total of assumed liabilities (including all operating liabilities, reserves and indebtedness) that does not exceed $5,000,000 individually or $10,000,000 in the aggregate;

          (f) sell, lease, sublease, exchange or otherwise transfer, or create or incur any Lien, other than a Permitted Lien, on, any of Allied World’s or any of its Subsidiaries’ assets, securities, properties, interests or businesses, or grant any option with respect to any of the foregoing, other than (i) in bona fide transactions, on arm’s-length terms in the ordinary course of business consistent with past practice, including in respect of letter of credit facilities and/or (ii) other sales of assets, securities, properties, interests or businesses with a sale price or carrying value net of the total of assumed liabilities (including all operating liabilities, reserves and indebtedness) that does not exceed $5,000,000 individually or $10,000,000 in the aggregate;

          (g) other than in connection with actions permitted by Section 5.2(d) or Section 5.2(e), make any loans, advances or capital contributions to, or investments in, any other Person, other than in the ordinary course of business consistent with past practice or loans, advances or capital contributions to, or investments in, wholly owned Subsidiaries of Allied World;

          (h) create, incur, assume, suffer to exist or otherwise be liable with respect to any indebtedness for borrowed money or guarantees thereof (including reimbursement obligations with respect to letters of credit), other than (i) in replacement of existing or maturing debt, (ii) guarantees relating to business written by any wholly owned Subsidiary (whether directly or indirectly) of Allied World in the ordinary course of Allied World’s and its Subsidiaries’ insurance or reinsurance business consistent with past practice and (iii) draw-

downs pursuant to existing credit facilities and letters of credit in support of Allied World’s and its Subsidiaries’ insurance or reinsurance business consistent with past practice;

          (i) (i) with respect to any director, officer or employee of Allied World or any of its Subsidiaries whose annual base salary exceeds $275,000, (A) grant or increase any severance or termination pay to (or amend any existing severance pay or termination arrangement) or (B) enter into any employment, deferred compensation or other similar agreement (or amend any such existing agreement), (ii) increase benefits payable under any existing severance or termination pay policies, (iii) establish, adopt or amend (except as required by applicable Law) any collective bargaining, bonus, profit-sharing, thrift, pension, retirement, deferred compensation, stock option, restricted stock or other benefit plan or arrangement; provided, that Allied World may, to the extent appropriate, adjust the performance goals for, or convert, all Allied World Stock Options and Allied World Stock-Based Awards that vest upon the achievement of performance criteria in the manner agreed to by Transatlantic and Allied World within 15 Business Days following the date hereof (or such later time as may be agreed to by the parties) to appropriately reflect the Merger with respect to performance periods that will not have ended prior to the Effective Time, or (iv) increase compensation, bonus or other benefits payable to any employee of Allied World or any of its Subsidiaries, except, with respect to any director, officer or employee of Allied World or any of its Subsidiaries whose annual base salary does not exceed $275,000, for increases in the ordinary course of business consistent with past practice;

          (j) change Allied World’s methods of accounting, except as required by concurrent changes in GAAP or SAP, as agreed to by its independent public accountants;

          (k) settle, or offer or propose to settle, any material litigation, investigation, arbitration, proceeding or other claim involving or against Allied World or any of its Subsidiaries, except (i) where the amount paid in settlement or compromise, in each case, does not exceed $1,000,000, (ii) arising from ordinary course claims for insurance or reinsurance (but excluding material litigation relating to such claims) that are handled pursuant to Allied World’s normal claims handling process consistent with past practice or (iii) where the amount paid in settlement does not exceed the amount reserved for such claim in the financial statements set forth in the Allied World SEC Documents;

          (l) (i) make or change any material Tax election, (ii) change any annual tax accounting period, (iii) adopt or change any method of tax accounting except as required by applicable Law, (iv) materially amend any Tax Returns, (v) enter into any material closing agreement, (vi) settle any material Tax claim, audit or assessment or (vii) surrender any right to claim a material Tax refund, offset or other reduction in Tax liability;

          (m) amend or modify in any material respect or terminate (excluding terminations upon expiration of the term thereof in accordance with their terms) any Allied World Material Contract or waive, release or assign any material rights, claims or benefits of it or its Subsidiaries under any Allied World Material Contract, or enter into any Contract or agreement that would have been an Allied World Material Contract had it been entered into prior to this Agreement, except in the ordinary course of business consistent with past practice;

               (n) adopt a plan of complete or partial liquidation, dissolution, merger, consolidation, restructuring, recapitalization or other reorganization of Allied World or any material Allied World Subsidiary (other than the Merger); and

               (o) agree, resolve or commit to (i) do any action restricted by this Section 5.2 or (ii) accept any restriction that would prevent Allied World or any of its Subsidiaries from taking any action required by this Section 5.2.

          5.3 Transatlantic Forbearances. During the period from the date of this Agreement to the Effective Time, except as set forth in Section 5.3 of the Transatlantic Disclosure Schedule and except as required by Law or the rules and regulations of the SEC or the NYSE or as expressly contemplated or permitted by this Agreement, Transatlantic will not, and will not permit any of the Transatlantic Subsidiaries to, without the prior written consent of Allied World (which shall not be unreasonably withheld, conditioned or delayed):

               (a) amend its Organizational Documents (whether by merger, consolidation or otherwise);

               (b) (i) split, combine or reclassify any shares of its capital stock, or propose to split, combine or reclassify, any of its share capital, or issue or authorize or propose the issuance or authorization of any other securities in respect of, or in lieu of or in substitution for, shares of its share capital, (ii) declare, set aside or pay any dividend or other distribution (whether in cash, stock or property or any combination thereof) in respect of its capital stock, except dividends paid by a direct or indirect wholly owned Subsidiary of Transatlantic to Transatlantic or to any of Transatlantic’s other direct or indirect wholly owned Subsidiaries (to the extent that any such dividends do not result in any Subsidiary of Transatlantic breaching or otherwise violating any applicable regulatory capital requirements or becoming subject to any additional regulatory oversight or reporting requirements) or (iii) redeem, repurchase or otherwise acquire or offer to redeem, repurchase, or otherwise acquire any shares of Transatlantic’s (or any of its Subsidiaries’) share capital or any securities convertible into or exercisable for any shares of Transatlantic’s (or any of its Subsidiaries’) share capital, other than repurchases, redemptions or acquisitions by Transatlantic or any wholly owned Subsidiary of Transatlantic of share capital or such other securities, as the case may be, of any other wholly owned Subsidiary of Transatlantic;

               (c) (i) issue, deliver, pledge or sell, or authorize the issuance, delivery or sale of, any shares of any Transatlantic Common Stock, Equity Equivalents or capital stock of any Transatlantic Subsidiary, other than the issuance of (A) any shares of Transatlantic Common Stock upon the exercise of Transatlantic Stock-Based Awards that are outstanding on the date of this Agreement in accordance with the terms of Transatlantic Stock Plans on the date of this Agreement and (B) any capital stock of any Transatlantic Subsidiary to Transatlantic or any other Subsidiary of Transatlantic or (ii) amend any term of any Transatlantic Common Stock or Equity Equivalent (in each case, whether by merger, consolidation or otherwise);

               (d) incur any capital expenditures or any obligations or liabilities in respect thereof, except for (i) those contemplated by the capital expenditure budget set forth in Section

5.3(d) of the Transatlantic Disclosure Schedule and (ii) any unbudgeted capital expenditures not to exceed $1,000,000 individually or $2,500,000 in the aggregate;

          (e) acquire (by merger, consolidation, acquisition of stock or assets or otherwise), directly or indirectly, any assets, securities, properties, interests or businesses, other than (i) supplies, equipment and investment securities or other assets in bona fide transactions, on arm’s-length terms in the ordinary course of business of Transatlantic and its Subsidiaries in a manner that is consistent with past practice and/or (ii) acquisitions with a purchase price net of the total of assumed liabilities (including all operating liabilities, reserves and indebtedness) that does not exceed $5,000,000 individually or $10,000,000 in the aggregate;

          (f) sell, lease, sublease, exchange or otherwise transfer, or create or incur any Lien, other than a Permitted Lien, on, any of Transatlantic’s or any of its Subsidiaries’ assets, securities, properties, interests or businesses, or grant any option with respect to any of the foregoing other than (i) in bona fide transactions, on arm’s-length terms in the ordinary course of business consistent with past practice, including in respect of letter of credit facilities and/or (ii) other sales of assets, securities, properties, interests or businesses with a sale price or carrying value net of the total of assumed liabilities (including all operating liabilities, reserves and indebtedness) that does not exceed $5,000,000 individually or $10,000,000 in the aggregate;

          (g) other than in connection with actions permitted by Section 5.3(d) or Section 5.3(e), make any loans, advances or capital contributions to, or investments in, any other Person, other than in the ordinary course of business consistent with past practice or loans, advances or capital contributions to, or investments in, wholly owned Subsidiaries of Transatlantic;

          (h) create, incur, assume, suffer to exist or otherwise be liable with respect to any indebtedness for borrowed money or guarantees thereof (including reimbursement obligations with respect to letters of credit), other than (i) in replacement of existing or maturing debt, (ii) guarantees relating to business written by any wholly owned Subsidiary (whether directly or indirectly) of Transatlantic in the ordinary course of Transatlantic’s and its Subsidiaries’ reinsurance business consistent with past practice and (iii) draw-downs pursuant to existing credit facilities and letters of credit in support of Transatlantic’s and its Subsidiaries’ reinsurance business consistent with past practice;

          (i) (i) with respect to any director, officer or employee of Transatlantic or any of its Subsidiaries whose annual base salary exceeds $275,000, (A) grant or increase any severance or termination pay to (or amend any existing severance pay or termination arrangement) or (B) enter into any employment, deferred compensation or other similar agreement (or amend any such existing agreement), (ii) increase benefits payable under any existing severance or termination pay policies, (iii) establish, adopt or amend (except as required by applicable Law) any collective bargaining, bonus, profit-sharing, thrift, pension, retirement, deferred compensation, stock option, restricted stock or other benefit plan or arrangement or (iv) increase compensation, bonus or other benefits payable to any employee of Transatlantic or any of its Subsidiaries, except, with respect to any director, officer or employee of Transatlantic or any of its Subsidiaries whose annual base salary does not exceed $275,000, for increases in the ordinary course of business consistent with past practice;

               (j) change Transatlantic’s methods of accounting, except as required by concurrent changes in GAAP or SAP, as agreed to by its independent public accountants;

               (k) settle, or offer or propose to settle, any material litigation, investigation, arbitration, proceeding or other claim involving or against Transatlantic or any of its Subsidiaries, except (i) where the amount paid in settlement or compromise, in each case, does not exceed $1,000,000, (ii) arising from ordinary course claims for reinsurance (but excluding material litigation relating to such claims) that are handled pursuant to Transatlantic’s normal claims handling process consistent with past practice or (iii) where the amount paid in settlement does not exceed the amount reserved for such claim in the financial statements set forth in the Transatlantic SEC Documents;

               (l) (i) make or change any material Tax election, (ii) change any annual tax accounting period, (iii) adopt or change any method of tax accounting except as required by applicable Law, (iv) materially amend any Tax Returns, (v) enter into any material closing agreement, (vi) settle any material Tax claim, audit or assessment or (vii) surrender any right to claim a material Tax refund, offset or other reduction in Tax liability;

               (m) amend or modify in any material respect or terminate (excluding terminations upon expiration of the term thereof in accordance with their terms) any Transatlantic Material Contract or waive, release or assign any material rights, claims or benefits of it or its Subsidiaries under any Transatlantic Material Contract, or enter into any Contract or agreement that would have been a Transatlantic Material Contract had it been entered into prior to this Agreement, except in the ordinary course of business consistent with past practice;

               (n) adopt a plan of complete or partial liquidation, dissolution, merger, consolidation, restructuring, recapitalization or other reorganization of Transatlantic or any material Transatlantic Subsidiary (other than the Merger); and

               (o) agree, resolve or commit to (i) do any action restricted by this Section 5.3 or (ii) accept any restriction that would prevent Transatlantic or any of its Subsidiaries from taking any action required by this Section 5.3.

          5.4 Control of Other Party’s Business. Nothing contained in this Agreement will give Allied World, directly or indirectly, the right to control Transatlantic or any of the Transatlantic Subsidiaries or direct the business or operations of Transatlantic or any of the Transatlantic Subsidiaries prior to the Effective Time. Nothing contained in this Agreement will give Transatlantic, directly or indirectly, the right to control Allied World or any of the Allied World Subsidiaries or direct the business or operations of Allied World or any of the Allied World Subsidiaries prior to the Effective Time. Prior to the Effective Time, each of Allied World and Transatlantic will exercise, consistent with the terms and conditions of this Agreement, complete control and supervision over its respective operations and the operations of its respective Subsidiaries. Nothing in this Agreement, including any of the actions, rights or restrictions set forth herein, will be interpreted in such a way as to place Transatlantic or Allied World in violation of any applicable Law.

     5.5 No Solicitation.

               (a) Allied World shall not, and shall cause the Allied World Subsidiaries and each officer or director of Allied World or any Allied World Subsidiary not to, and shall use its reasonable best efforts to cause each controlled Affiliate and any employee, agent, consultant or representative (including any financial or legal advisor or other representative) of Allied World, any of the Allied World Subsidiaries or any such controlled Affiliate not to, and on becoming aware of it, shall use its best efforts to stop any such Person from continuing to, directly or indirectly, (i) solicit, initiate or knowingly encourage or facilitate (including by way of furnishing information) or take any other action designed to facilitate any inquiries or proposals regarding, or that would reasonably be expected to lead to, any merger, share exchange, amalgamation, consolidation, sale of assets, sale of shares of capital stock (including by way of a tender offer or exchange offer) or similar transactions involving Allied World or any of the Allied World Subsidiaries that, if consummated, would constitute a Competing Transaction (any of the foregoing inquiries or proposals being referred to herein as an “Allied World Acquisition Proposal”), (ii) solicit, initiate, knowingly encourage or participate in any discussions or negotiations regarding, or furnish to any Person any information in connection with, or otherwise cooperate in any way with, or knowingly facilitate in any way any effort by, any Person in connection with, any Allied World Acquisition Proposal or (iii) enter into any letter of intent, memorandum of understanding, agreement in principle, acquisition agreement, merger agreement, option agreement, joint venture agreement, partnership agreement or other agreement regarding, or that is intended to result in, or would reasonably be expected to lead to, any Allied World Acquisition Proposal (an “Allied World Acquisition Agreement”).

               (b) Transatlantic shall not, and shall cause the Transatlantic Subsidiaries and each officer or director of Transatlantic or any Transatlantic Subsidiary not to, and shall use its reasonable best efforts to cause each controlled Affiliate and any employee, agent, consultant or representative (including any financial or legal advisor or other representative) of Transatlantic, any of the Transatlantic Subsidiaries or any such controlled Affiliate not to, and on becoming aware of it, shall use its best efforts to stop any such Person from continuing to, directly or indirectly, (i) solicit, initiate or knowingly encourage or facilitate (including by way of furnishing information) or take any other action designed to facilitate any inquiries or proposals regarding, or that would reasonably be expected to lead to, any merger, share exchange, amalgamation, consolidation, sale of assets, sale of shares of capital stock (including by way of a tender offer or exchange offer) or similar transactions involving Transatlantic or any of the Transatlantic Subsidiaries that, if consummated, would constitute a Competing Transaction (any of the foregoing inquiries or proposals being referred to herein as a “Transatlantic Acquisition Proposal” and, together with any Allied World Acquisition Proposal, each an “Acquisition Proposal”), (ii) solicit, initiate, knowingly encourage or participate in any discussions or negotiations regarding, or furnish to any Person any information in connection with, or otherwise cooperate in any way with, or knowingly facilitate in any way any effort by, any Person in connection with, any Transatlantic Acquisition Proposal or (iii) enter into any letter of intent, memorandum of understanding, agreement in principle, acquisition agreement, merger agreement, option agreement, joint venture agreement, partnership agreement or other agreement regarding, or that is intended to result in, or would reasonably be expected to lead to, any Transatlantic Acquisition Proposal (a “Transatlantic Acquisition Agreement”).

          (c) As used in this Agreement, “Competing Transaction” means, with respect to Allied World or Transatlantic, as the case may be (for this purpose, the “Target Party”), any of (i) a transaction, including any tender offer, exchange offer or share exchange, pursuant to which any third Person (or group) other than the other party to this Agreement (the “Non-Target Party”) or such third Person’s Affiliates, or the stockholders of such third Person, directly or indirectly, acquires or would acquire beneficial ownership (as defined in Rule 13d-3 under the Exchange Act) of 10% or more of the outstanding shares of common stock or ordinary shares, as applicable, of the Target Party or of the outstanding voting power of the Target Party (or options, rights or warrants to purchase, or securities convertible into or exchangeable for, such common stock or ordinary shares or other securities representing such voting power), whether from the Target Party or pursuant to a tender offer or exchange offer or otherwise, (ii) a merger, amalgamation, consolidation or business combination pursuant to which any third Person or group of Persons (other than the Non-Target Party or its Affiliates) party thereto, or the stockholders of such third Person or Persons, beneficially owns or would beneficially own 10% or more of the outstanding shares of common stock or ordinary shares, as applicable, or the outstanding voting power of the Target Party, or, if applicable, any surviving entity or the parent entity resulting from any such transaction, immediately upon consummation thereof, (iii) a recapitalization of Target Party or any of its Subsidiaries or any transaction similar to a transaction referred to in clause (ii) involving the Target Party or any of its Subsidiaries pursuant to which any third Person or group of Persons (other than the Non-Target Party or its Affiliates) party thereto, or its stockholders, beneficially owns or would beneficially own 10% or more of the outstanding shares of common stock or ordinary shares, as applicable, or the outstanding voting power of the Target Party or such Subsidiary or, if applicable, the parent entity resulting from any such transaction immediately upon consummation thereof or (iv) any transaction pursuant to which any third Person or group of Persons (other than the Non-Target Party or its Affiliates) directly or indirectly (including by way of merger, consolidation, share exchange, amalgamation, other business combination, partnership, joint venture or otherwise) acquires or would acquire control of assets (including for this purpose the equity securities of, or other ownership interest in, Subsidiaries of the Target Party and securities of the entity surviving any merger or business combination involving any of the Subsidiaries of the Target Party) of the Target Party or any of its Subsidiaries representing 10% or more of consolidated revenues, net income, or EBITDA for the last 12 full calendar months or the fair market value of all the assets of the Target Party and its Subsidiaries, taken as a whole, immediately prior to such transaction; provided, however, that no transaction involving solely the acquisition of capital stock or assets of any Allied World Subsidiary by Allied World, or of any Transatlantic Subsidiary by Transatlantic, will be deemed to be a Competing Transaction. Wherever the term “group” is used in this Agreement, it is used as defined in Rule 13d-3 under the Exchange Act.

          (d) The Target Party shall notify the Non-Target Party promptly (but in no event later than 24 hours) after receipt of any Acquisition Proposal, or any material modification of or material amendment to any Acquisition Proposal, or any inquiry or request for non-public information relating to the Target Party or any of its Subsidiaries or for access to the properties, books or records of the Target Party or any of its Subsidiaries by any Person that is reasonably likely to lead to or contemplate an Acquisition Proposal. Such notice to the Non-Target Party shall be made orally and in writing and shall indicate the identity of the Person or Persons making the Acquisition Proposal or inquiry or requesting non-public information or access to the properties, books or records of the Target Party or any of its Subsidiaries, and a copy of the

Acquisition Proposal or, if not in writing, a written summary in reasonable detail of the material terms of any such Acquisition Proposal, inquiry or request or modification or amendment to an Acquisition Proposal. The Target Party shall (i) keep the Non-Target Party fully informed, on a current basis, of any material changes in the status of, and any material changes or modifications in the terms of, any such Acquisition Proposal, inquiry or request and, if requested by the Non-Target Party, counsel for the Target Party shall consult with counsel for the Non-Target Party once per day, at mutually agreeable times, regarding such status and any such changes or modifications, and (ii) provide to the Non-Target Party as soon as practicable after receipt or delivery thereof with copies of all correspondence and other written material sent or provided to the Target Party from any third party in connection with any Acquisition Proposal or sent or provided by the Target Party to any third party in connection with any Acquisition Proposal; provided, however, that any material written material or material correspondence shall be sent or provided pursuant to clause (ii) within 24 hours after receipt or delivery thereof. Neither Allied World nor Transatlantic shall enter into any agreement on or after the date hereof that would prevent such party from providing any information required by this Section 5.5 to the other party.

          (e) Notwithstanding anything to the contrary in this Section 5.5, at any time prior to obtaining the Allied World Requisite Stockholder Vote or the Transatlantic Requisite Stockholder Vote, as applicable, the Target Party may furnish or cause to be furnished information to, and enter or cause to be entered into discussions with, and only with, a Person (and its representatives) who has made a bona fide written Acquisition Proposal that was not solicited on or after the date of this Agreement and that did not otherwise result from a breach of Section 5.5(a) or Section 5.5(b), as applicable, if the Target Party’s Board of Directors (the “Target Board”) has (i) determined in good faith (after consultation with its outside legal counsel and financial advisor or advisors) that (A) such Acquisition Proposal constitutes or is reasonably likely to lead to a Superior Proposal and (B) the failure to enter into discussions regarding the Acquisition Proposal would result in a breach of its fiduciary duties under applicable Law, (ii) provided at least three Business Days’ notice to the Non-Target Party of its intent to furnish information to or enter into discussions with such Person in accordance with this Section 5.5(e), and (iii) obtained from such Person an executed confidentiality agreement containing terms that are determined in good faith by the Target Party to be substantially similar to and not less favorable to the Target Party, in the aggregate, than those contained in the Confidentiality Agreement (it being understood that such confidentiality agreement and any related agreements shall not include any provision calling for any exclusive right to negotiate with such Person or having the effect of prohibiting the Target Party from satisfying its obligations under this Agreement). Unless such information has been previously provided to the Non-Target Party, all information that is provided by the Target Party to the Person making such Acquisition Proposal shall be provided to the Non-Target Party. During the three Business Day period set forth in clause (ii), the Non-Target Party shall have the right to make a presentation to the Target Board.

          (f) As used in this Agreement, “Superior Proposal” means a bona fide written Acquisition Proposal made by a third Person (or group of Persons) (and not obtained in breach of this Agreement, including, without limitation, this Section 5.5) to consummate a merger, amalgamation, consolidation, business combination or other similar transaction involving the Target Party pursuant to which the stockholders of the Target Party immediately preceding such transaction would hold less than 50% of the outstanding shares of common stock or ordinary

shares, as applicable, of, or less than 50% of the outstanding voting power of, the Target Party, any surviving entity or the parent entity resulting from any such transaction immediately upon consummation thereof that the Target Board (after consultation with its outside legal counsel and its financial advisor or advisors) determines in good faith to be more favorable to the Target Party’s stockholders than the Merger, taking into account all relevant factors, including value and other financial considerations, legal and regulatory considerations and any conditions to, and expected timing and risks of, completion, as well as any changes to the terms of the Merger proposed by the Non-Target Party in response to such Superior Proposal.

          (g) Except as permitted by this Section 5.5(g), neither the Target Board nor any committee thereof shall (i) (A) withdraw (or modify or qualify in any manner adverse to the Non-Target Party) the approval, recommendation or declaration of advisability by the Target Board or any such committee of this Agreement, the Restated Articles and the Merger or any of the other transactions contemplated hereby, (B) adopt, approve, recommend, endorse or otherwise declare advisable the adoption of any Acquisition Proposal or (C) resolve, agree or publicly propose to take any such actions (each such action set forth in this Section 5.5(g)(i) being referred to herein as an “Adverse Recommendation Change”) or (ii) cause or permit the Target Party to enter into, or resolve, agree or propose publicly to do so with respect to, any Allied World Acquisition Agreement (in the case of Allied World) or Transatlantic Acquisition Agreement (in the case of Transatlantic) (other than a confidentiality agreement as referred to in Section 5.5(e)). Notwithstanding anything to the contrary in this Section 5.5, at any time prior to obtaining the Allied World Requisite Stockholder Vote (in the case of Allied World) or the Transatlantic Requisite Stockholder Vote (in the case of Transatlantic) the Target Board may, if the Target Board determines in good faith that the failure to do so would result in a breach of its fiduciary duties under applicable Law, taking into account all adjustments to the terms of this Agreement that may be offered by the Non-Target Party pursuant to this Section 5.5(g), make an Adverse Recommendation Change; provided, however, that the Target Party may not make an Adverse Recommendation Change, unless (1) the Target Party promptly notifies the Non-Target Party in writing at least three Business Days before taking that action of its intention to do so, and specifying the reasons therefor, including the terms and conditions of, and the identity of any Person making any Acquisition Proposal, and contemporaneously furnishing a copy of any relevant Allied World Acquisition Agreement (in the case of Allied World) or Transatlantic Acquisition Agreement (in the case of Transatlantic) and any other relevant transaction documents (it being understood and agreed that any amendment to the financial terms or any other material term of such Acquisition Proposal shall require a new written notice by the Target Party and a new three Business Day period) and (2) prior to the expiration of such three Business Day period, in the case of an Acquisition Proposal, the Non-Target Party does not make a proposal to adjust the terms and conditions of this Agreement that the Target Board determines in good faith to be at least as favorable as the Acquisition Proposal after giving effect to, among other things, the payment of the Termination Fee set forth in Section 6.6, such that the Target Board determines such action is no longer required by its fiduciary duties to the stockholders of the Target Party under applicable Law. During the three Business Day period prior to its effecting an Adverse Recommendation Change, the Target Party shall, and shall cause its financial and legal advisors to, negotiate with the Non-Target Party in good faith (to the extent the Non-Target Party seeks to negotiate) regarding any revisions to the terms of the transactions contemplated by this Agreement proposed by the Non-Target Party. The Target Party shall not

submit to the vote of its stockholders any Acquisition Proposal, or, except as permitted herein, propose to do so.

               (h) (i) Nothing contained in this Section 5.5 shall prohibit the Target Party or its Subsidiaries from taking and disclosing to its stockholders a position required by Rule 14e-2(a) or Rule 14d-9 promulgated under the Exchange Act and (ii) no disclosure that the Allied World Board or the Transatlantic Board may determine (after consultation with counsel) that it or Allied World or Transatlantic, as applicable, is required to make under applicable Law shall constitute a violation of this Agreement; provided, however, that in any event neither the Allied World Board nor the Transatlantic Board shall make an Adverse Recommendation Change except in accordance with Section 5.5(g). Any disclosure by the Target Party relating to an Acquisition Proposal shall be deemed to be an Adverse Recommendation Change by the Target Party, unless the Target Board reaffirms its recommendation and declaration of advisability with respect to this Agreement in such disclosure.

               (i) Each of Allied World and Transatlantic and their respective Subsidiaries shall immediately cease and cause to be terminated any existing discussions or negotiations with any Persons (other than the other party to this Agreement) conducted heretofore with respect to any Acquisition Proposal, and shall use reasonable best efforts to cause all Persons, other than the other party hereto, who have been furnished confidential information regarding such party in connection with the solicitation of or discussions regarding an Acquisition Proposal within the twelve (12) months prior to the date of this Agreement promptly to return or destroy such information.

               (j) It is understood that any violation of the restrictions set forth in this Section 5.5 by any director, officer, employee, controlled Affiliate, agent or representative (including financial or legal advisor or other retained representative) of either party or any of its Subsidiaries or controlled Affiliates shall be deemed to be a breach of this Section 5.5 by such party.

ARTICLE VI.
ADDITIONAL AGREEMENTS

     6.1 Preparation of the Form S-4 and the Joint Proxy Statement; Stockholders Meetings.

               (a) Transatlantic and Allied World shall jointly prepare and shall use their reasonable best efforts to cause to be filed with the SEC, as promptly as practicable, and in no event later than 40 Business Days following the date of this Agreement, a joint proxy statement and the Form S-4, in which the joint proxy statement will be included as a prospectus (the “Joint Proxy Statement/Prospectus”), and each of Transatlantic and Allied World shall use its reasonable best efforts to have the Form S-4 declared effective under the Securities Act as promptly as practicable after such filing. Each of Allied World and Transatlantic shall furnish all information concerning such Person and its Affiliates to the other, and provide such other assistance, as may be reasonably requested in connection with the preparation, filing and distribution of the Form S-4 and Joint Proxy Statement/Prospectus. The Form S-4 and Joint Proxy Statement/Prospectus shall include all information reasonably requested by such other

party to be included therein. Each of Allied World and Transatlantic shall promptly notify the other upon the receipt of any comments from the SEC or any request from the SEC for amendments or supplements to the Form S-4 or Joint Proxy Statement/Prospectus and shall provide the other with copies of all correspondence between it and its Representatives, on one hand, and the SEC, on the other hand. Each of Allied World and Transatlantic shall use its reasonable best efforts to respond as promptly as practicable to any comments from the SEC with respect to the Form S-4 or Joint Proxy Statement/Prospectus. Notwithstanding the foregoing, prior to filing the Form S-4 (or any amendment or supplement thereto) or mailing the Joint Proxy Statement/Prospectus (or any amendment or supplement thereto) or responding to any comments of the SEC with respect thereto, each of Allied World and Transatlantic (i) shall provide the other an opportunity to review and comment on such document or response (including the proposed final version of such document or response) and (ii) shall include in such document or response all comments reasonably proposed by the other. Each of Allied World and Transatlantic shall advise the other, promptly after receipt of notice thereof, of the time of effectiveness of the Form S-4, the issuance of any stop order relating thereto or the suspension of the qualification of Allied World Shares constituting Merger Consideration for offering or sale in any jurisdiction, and each of Allied World and Transatlantic shall use its reasonable best efforts to have any such stop order or suspension lifted, reversed or otherwise terminated. Allied World shall also take any other action required to be taken under the Securities Act, the Exchange Act, any applicable foreign or state securities or “blue sky” laws and the rules and regulations thereunder in connection with the Merger, the issuance of the Merger Consideration and the issuance of Allied World Shares under the Transatlantic Stock Plans. Transatlantic shall furnish all information concerning Transatlantic and the holders of the Transatlantic Common Stock and rights to acquire Transatlantic Common Stock pursuant to the Transatlantic Stock Plans as may be reasonably requested in connection with any such action.

          (b) If, prior to the Effective Time, any event occurs with respect to Transatlantic or any Transatlantic Subsidiary, or any change occurs with respect to other information supplied by Transatlantic for inclusion in the Joint Proxy Statement/Prospectus or the Form S-4, which is required to be described in an amendment of, or a supplement to, the Joint Proxy Statement/Prospectus or the Form S-4, Transatlantic shall promptly notify Allied World of such event, and Transatlantic and Allied World shall cooperate in the prompt filing with the SEC of any necessary amendment or supplement to the Joint Proxy Statement/Prospectus and the Form S-4 and, as required by Law, in disseminating the information contained in such amendment or supplement to Transatlantic’s stockholders and Allied World’s stockholders. Nothing in this Section 6.1(b) shall limit the obligations of any party under Section 6.1(a).

          (c) If, prior to the Effective Time, any event occurs with respect to Allied World or any Allied World Subsidiary, or any change occurs with respect to other information supplied by Allied World for inclusion in the Joint Proxy Statement/Prospectus or the Form S-4, which is required to be described in an amendment of, or a supplement to, the Joint Proxy Statement/Prospectus or the Form S-4, Allied World shall promptly notify Transatlantic of such event, and Allied World and Transatlantic shall cooperate in the prompt filing with the SEC of any necessary amendment or supplement to the Joint Proxy Statement/Prospectus and the Form S-4 and, as required by Law, in disseminating the information contained in such

amendment or supplement to Transatlantic’s stockholders and Allied World’s stockholders. Nothing in this Section 6.1(c) shall limit the obligations of any party under Section 6.1(a).

          (d) Transatlantic shall, as soon as practicable, but in no event more than five (5) Business Days, following the effectiveness of the Form S-4 under the Securities Act, duly call, give notice of, and as soon as practicable convene and hold the Transatlantic Stockholders Meeting, which shall be held concurrently with the Allied World Stockholders Meeting. Transatlantic shall use its reasonable best efforts to (i) cause the Joint Proxy Statement/Prospectus to be mailed to Transatlantic’s stockholders and to hold the Transatlantic Stockholders Meeting as soon as practicable after the Form S-4 is declared effective under the Securities Act and (ii) solicit the Transatlantic Requisite Stockholder Vote. Transatlantic shall, through the Transatlantic Board, recommend to its stockholders that they give the Transatlantic Requisite Stockholder Vote and shall include such recommendation in the Joint Proxy Statement/Prospectus, except to the extent that the Transatlantic Board shall have made an Adverse Recommendation Change as permitted by Section 5.5(g). Transatlantic agrees that its obligations pursuant to this Section 6.1 shall not be affected by the commencement, public proposal, public disclosure or communication to Transatlantic of any Competing Transaction or by the making of any Adverse Recommendation Change by the Transatlantic Board.

          (e) Allied World shall, as soon as practicable, but in no event more than five (5) Business Days, following the effectiveness of the Form S-4 under the Securities Act, duly call, give notice of, and as soon as practicable convene and hold the Allied World Stockholders Meeting, which shall be held concurrently with the Transatlantic Stockholders Meeting. Allied World shall use its reasonable best efforts to (i) cause the Joint Proxy Statement/Prospectus to be mailed to Allied World’s stockholders as promptly as practicable after the Form S-4 is declared effective under the Securities Act and to hold the Allied World Stockholders Meeting as soon as practicable after the Form S-4 becomes effective and (ii) solicit the Allied World Requisite Stockholder Vote. Allied World shall, through the Allied World Board, recommend to its stockholders that they give the Allied World Requisite Stockholder Vote and shall include such recommendation in the Joint Proxy Statement/Prospectus, except to the extent that the Allied World Board shall have made an Adverse Recommendation Change as permitted by Section 5.5(g). Allied World agrees that its obligations pursuant to this Section 6.1 shall not be affected by the commencement, public proposal, public disclosure or communication to Allied World of any Competing Transaction or by the making of any Adverse Recommendation Change by the Allied World Board.

          6.2 Access to Information; Confidentiality. Upon reasonable notice and subject to applicable Law, each of Transatlantic and Allied World shall, and shall cause each of its respective Subsidiaries to, afford to the other party and to the Representatives of such other party reasonable access during the period prior to the Effective Time to all their respective properties, books, Contracts, commitments, personnel and records and, during such period, each of Transatlantic and Allied World shall, and shall cause each of its respective Subsidiaries to, furnish promptly to the other party (a) a copy of each report, schedule, registration statement and other document filed by it during such period pursuant to the requirements of federal or state securities Laws or Insurance Laws (other than such documents that such party is not permitted to disclose under applicable Law) and (b) all other information concerning its business, properties and personnel as such other party may

reasonably request; provided, however, that either party may withhold any document or information (i) that is subject to the terms of a confidentiality agreement with a third party entered into prior to the date of this Agreement or entered into after the date of this Agreement in the ordinary course of business (provided that the withholding party shall use commercially reasonable efforts to obtain the required consent of such third party to provide such access or disclosure), (ii) the disclosure of which would violate any Law or fiduciary duty (provided that the withholding party shall use commercially reasonable efforts to make appropriate substitute arrangements to permit reasonable disclosure not in violation of any Law or fiduciary duty) or (iii) that is subject to any attorney-client privilege (provided that the withholding party shall use commercially reasonable efforts to allow for such access or disclosure to the maximum extent that does not result in a loss of attorney-client privilege). Furthermore, the parties acknowledge that with respect to the “Sensitive Information” (as defined in the Confidentiality Agreement), the Confidentiality Agreement imposes additional restrictions as to the manner in which such information will be exchanged by the parties. Without limiting the generality of the foregoing, each of Allied World and Transatlantic shall, within two Business Days of a request by the other party therefor, provide to such other party the information described in Rule 14a-7(a)(2)(ii) under the Exchange Act. All information exchanged pursuant to this Section 6.2 shall be subject to the confidentiality agreement, dated March 27, 2011, between Allied World and Transatlantic (as supplemented and amended from time to time, the “Confidentiality Agreement”). No investigation pursuant to this Section 6.2 or information provided, made available or delivered to Transatlantic or Allied World pursuant to this Section 6.2 or otherwise shall affect any representations or warranties of Allied World or Transatlantic or conditions or rights of Allied World or Transatlantic contained in this Agreement.

     6.3 Required Actions.

               (a) Each of the parties shall use its reasonable best efforts to take, or cause to be taken, all actions, and do, or cause to be done, and assist and cooperate with the other parties in doing, all things necessary to consummate and make effective, as soon as reasonably possible, the Merger and the other transactions contemplated by this Agreement in accordance with the terms hereof; provided, however, that nothing in this Section 6.3 shall prohibit either party from taking any action expressly contemplated by Section 5.5.

               (b) In connection with and without limiting Section 6.3(a), subject to the terms and conditions of this Agreement, each party will use its reasonable best efforts to take, or cause to be taken, all actions, to file, or cause to be filed, all documents and to do, or cause to be done, all things necessary, proper or advisable to consummate the transactions contemplated by this Agreement, including preparing and filing as promptly as practicable all documentation to effect all necessary filings, consents, waivers, approvals, authorizations, permits or orders from all third parties and Governmental Entities, including those required to satisfy the conditions set forth in Section 7.1(d) and Section 7.1(f), so as to enable the Closing to occur as soon as reasonably practicable. To the extent necessary in order to accomplish the foregoing, Allied World and Transatlantic shall jointly propose, negotiate, commit to and effect, by consent decree, hold separate order or otherwise, the holding separate, sale, divestiture or any other disposition of, or prohibition or limitation on, (A) the ownership or operation by Allied World, Transatlantic or any of their respective Subsidiaries of any portion of the business, properties or

assets of Allied World, Transatlantic or any of their respective Subsidiaries, (B) the ability of Allied World to acquire or hold, or exercise full right of ownership of, any shares of the capital stock of the Allied World Subsidiaries or Transatlantic or the Transatlantic Subsidiaries, including the right to vote, or (C) Allied World or any of its Subsidiaries effectively controlling the business or operations of Allied World and the Allied World Subsidiaries or Transatlantic and the Transatlantic Subsidiaries; provided, however, that neither Transatlantic nor Allied World shall be required pursuant to this Section 6.3(b) to propose, commit to or effect any action that is not conditioned upon the consummation of the Merger. If the actions taken by Transatlantic and Allied World pursuant to the immediately preceding sentence do not result in the conditions set forth in Section 7.1(d) and Section 7.1(f) being satisfied, then each of Transatlantic and Allied World shall jointly (to the extent practicable) initiate and/or participate in any proceedings, whether judicial or administrative, in order to (i) oppose or defend against any action or proceeding by any Governmental Entity or other Person to challenge, prevent or enjoin the consummation of the Merger or any of the other transactions contemplated by this Agreement and (ii) take such action as is necessary to overturn any regulatory action or proceeding by any Governmental Entity or other Person to challenge or block, in whole or in part, consummation of the Merger or any of the other transactions contemplated by this Agreement, including by defending any suit, action or other legal proceeding brought by any Governmental Entity or other Person in order to avoid the entry of, or to have vacated, overturned or terminated, including by appeal if necessary, any Injunction or other prohibition resulting from any suit, action or other legal proceeding that would cause any condition set forth in Section 7.1(d) or Section 7.1(f) not to be satisfied, provided that Transatlantic and Allied World shall cooperate with one another in connection with, and shall jointly control, all proceedings related to the foregoing.

          (c) In connection with and without limiting the generality of the foregoing, each of Transatlantic and Allied World shall:

          (i) make or cause to be made, in consultation and cooperation with the other and as promptly as practicable after the date of this Agreement (but in any event, with respect to clause (A) below, within fifteen (15) Business Days following the date of this Agreement), (A) an appropriate filing of a Notification and Report Form pursuant to the HSR Act relating to the Merger, (B) any required filings under the Antitrust Laws of Brazil and Italy within fifteen (15) Business Days following the date of this Agreement, and (C) all other necessary registrations, declarations, notices and filings relating to the Merger with any other Governmental Entities under any other antitrust, competition, trade regulation or similar Laws, including in those jurisdictions set forth in Section 7.1(d) of the Allied World Disclosure Schedule and Section 7.1(d) of the Transatlantic Disclosure Schedule under the heading “Antitrust Approvals”;

          (ii) use its reasonable best efforts to furnish to the other all assistance, cooperation and information required for any such registration, declaration, notice or filing and in order to achieve the effects set forth in Section 6.3(b);

          (iii) keep the other apprised of the status of its filings, registrations and submissions with any Governmental Entity and give the other reasonable prior notice of any such registration, declaration, notice or filing and, to the extent reasonably

practicable, of any communication with any Governmental Entity regarding the Merger (including with respect to any of the actions referred to in Section 6.3(b)), and permit the other to review and discuss in advance, and consider in good faith the views of, and secure the participation of, the other in connection with, any such registration, declaration, notice, filing or communication;

          (iv) respond as promptly as practicable under the circumstances to any inquiries received from any Governmental Entity or any other authority enforcing applicable antitrust, competition, trade regulation or similar Laws for additional information or documentation in connection with antitrust, competition, trade regulation or similar matters;

          (v) without limiting the generality of Section 6.3(c)(iv), (A) use its reasonable best efforts to achieve Substantial Compliance as promptly as practicable with any request for additional information or documentary material issued by a Governmental Entity under 15 U.S.C. Sect. 18a(e) and in conjunction with the transactions contemplated by this Agreement (a “Second Request”), (B) certify Substantial Compliance with any Second Request as promptly as practicable after the date of such Second Request, but in no event later than December 15, 2011, (C) take all actions necessary to assert, defend and support its certification of Substantial Compliance with such Second Request and (D) not extend any waiting period under the HSR Act or enter into any agreement with such Governmental Entities or other authorities to delay, or otherwise not to consummate as soon as practicable, any of the transactions contemplated by this Agreement except with the prior written consent of the other parties hereto, which consent may be withheld in the sole discretion of the non-requesting party; and

          (vi) unless prohibited by applicable Law or by the applicable Governmental Entity, (A) to the extent reasonably practicable, not participate in or attend any meeting, or engage in any substantive conversation with any Governmental Entity in respect of the Merger (including with respect to any of the actions referred to in Section 6.3(c)) without the other, (B) to the extent reasonably practicable, give the other reasonable prior notice of any such meeting or conversation, (C) in the event one party is prohibited by applicable Law or by the applicable Governmental Entity from participating or attending any such meeting or engaging in any such conversation, keep such party reasonably apprised with respect thereto, (D) cooperate in the filing of any substantive memoranda, white papers, filings, correspondence or other written communications explaining or defending this Agreement and the Merger, articulating any regulatory or competitive argument, and/or responding to requests or objections made by any Governmental Entity, and (E) furnish the other party with copies of all correspondence, filings and communications (and memoranda setting forth the substance thereof) between it and its Affiliates and their respective Representatives on the one hand, and any Governmental Entity or members of any Governmental Entity’s staff, on the other hand, with respect to this Agreement and the Merger.

               (d) Transatlantic shall give prompt notice to Allied World, and Allied World shall give prompt notice to Transatlantic, of (i) any representation or warranty made by it contained in this Agreement that is qualified as to materiality becoming untrue or inaccurate in

any respect or any such representation or warranty that is not so qualified becoming untrue or inaccurate in any material respect or (ii) the failure by it to comply with or satisfy in any material respect any covenant, condition or agreement to be complied with or satisfied by it under this Agreement; provided, however, that no such notification shall affect the representations, warranties, covenants or agreements of the parties or the conditions to the obligations of the parties under this Agreement; provided further, that a failure to comply with this Section 6.3(d) will not constitute the failure of any condition set forth in Article VII to be satisfied, unless the underlying inaccuracy or breach would independently result in the failure of a condition set forth in Article VII to be satisfied.

               (e) Immediately following the execution and delivery of this Agreement by each of the parties hereto, Allied World, as sole stockholder of Merger Sub, will adopt this Agreement.

               (f) Each of Transatlantic and Allied World shall use its reasonable best efforts to cause the Allied World Shares which constitute Merger Consideration to be listed on the NYSE as of the Effective Time.

     6.4 Actions with Respect to Certain Existing Indebtedness.

               (a) Allied World Credit Facilities. Prior to the Effective Time, Allied World shall either (i) terminate the Allied World Secured Credit Facility and Allied World Unsecured Credit Facility or (ii) use its commercially reasonable efforts to obtain, on or before the Effective Time, the necessary consents (the “Requisite Lender Consents”) of lenders party to (A) the Allied World Secured Credit Facility and (B) the Allied World Unsecured Credit Facility, in each case, to allow the Allied World Secured Credit Facility and the Allied World Unsecured Credit Facility, as applicable, to remain in effect after the Effective Time with no default or event of default thereunder resulting from the Merger or the consummation of the other transactions contemplated hereby, with no (x) reduction of the outstanding amounts or lending or other financing commitments thereunder or (y) shortening of any maturity thereunder; provided, however, that nothing contained in this Section 6.4(a) shall permit or require Allied World to accept any terms or conditions with respect to the Allied World Secured Credit Facility or Allied World Unsecured Credit Facility, as applicable, that are not commercially reasonable (giving effect to the then-current economic environment). If applicable, Allied World shall deliver to Transatlantic drafts of all agreements to be entered into with its lenders in connection with obtaining the Requisite Lender Consents and shall keep Transatlantic informed in all material respects of the status of Allied World’s efforts to obtain the Requisite Lender Consents. Transatlantic shall use commercially reasonable efforts to cooperate with Allied World to obtain the Requisite Lender Consents to the extent reasonably requested by Allied World.

               (b) Supplemental Indenture. To the extent required, concurrently with the Closing, Allied World shall cause the Surviving Corporation to (i) issue and cause to be executed by the requisite parties a supplemental indenture (the “Supplemental Indenture”) pursuant to Section 901(1) of that certain Indenture, dated as of December 14, 2005, between Transatlantic and The Bank of New York, as supplemented by the First Supplemental Indenture, dated as of December 14, 2005, between Transatlantic and The Bank of New York and the Second Supplemental Indenture, dated as of November 23, 2009, between Transatlantic and The Bank of

New York Mellon (as supplemented, the “Transatlantic Indenture”) and (ii) comply with the applicable provisions of the Transatlantic Indenture, including the delivery of any opinion of counsel required thereunder.

     6.5 Indemnification and Directors and Officers Insurance.

               (a) Allied World agrees that all rights to indemnification, advancement of expenses and exculpation from liabilities for acts or omissions occurring prior to the Effective Time now existing in favor of the current or former directors or officers of Transatlantic and the Transatlantic Subsidiaries (each, an “Indemnified Party”) shall be assumed by Allied World and shall survive the Merger and continue in full force and effect in accordance with their terms.

               (b) At or prior to the Effective Time, Allied World shall purchase a “tail” directors’ and officers’ liability insurance policy for Transatlantic, the Transatlantic Subsidiaries and their respective current and former directors and officers who are currently covered by the directors’ and officers’ liability insurance coverage currently maintained by Transatlantic, in a form reasonably acceptable to Transatlantic, that shall provide Transatlantic, the Transatlantic Subsidiaries and such directors and officers with coverage for six years following the Effective Time of not less than the existing coverage and have other terms not less favorable to the insured persons than the directors’ and officers’ liability insurance coverage currently maintained by Transatlantic; provided, however, that in no event shall Allied World be required to expend for such policy an amount in excess of 250% of the annual aggregate premiums currently paid by Allied World for such insurance (the “Maximum Premium”). Allied World shall maintain such policy in full force and effect, and continue to honor the obligations thereunder. If such insurance coverage cannot be obtained at all, or can only be obtained at an annual premium in excess of the Maximum Premium, Allied World will cause to be maintained the most advantageous policies of directors’ and officers’ insurance obtainable for an annual premium equal to the Maximum Premium.

               (c) The provisions of this Section 6.5 will survive the Effective Time and are intended to be for the benefit of, and will be enforceable by, each Indemnified Party and his or her heirs and representatives. Allied World shall pay or cause to be paid (as incurred) all expenses, including reasonable fees and expenses of counsel, that an Indemnified Party may incur in enforcing the indemnity and other obligations provided for in this Section 6.5 (subject to reimbursement if the Indemnified Party is subsequently determined not to be entitled to indemnification under Section 6.5(a)).

               (d) If Allied World or any of its successors or assigns (i) consolidates with or merges into any other Person and is not the continuing or surviving corporation or entity of such consolidation or merger or (ii) transfers or conveys all or substantially all of its properties and assets to any Person, then, and in each such case, to the extent necessary, proper provision will be made so that the successors and assigns of Allied World, as the case may be, will assume the obligations set forth in this Section 6.5.

     6.6 Fees and Expenses.

               (a) Except as provided in this Section 6.6, all costs and expenses incurred in connection with this Agreement and the transactions contemplated by this Agreement will be paid by the party incurring such expense; provided, however, that Allied World and Transatlantic shall share equally (i) all fees and expenses in relation to the printing and filing of the Form S-4 and the printing, filing and distribution of the Joint Proxy Statement/Prospectus and (ii) any filing fees required in connection with the Merger pursuant to the HSR Act or any other Antitrust Law, other than, in the case of clause (i) or clause (ii), attorneys’ and accountants’ and expert fees and other costs and expenses.

               (b) In the event that this Agreement is terminated:

          (i) by Allied World pursuant to Section 8.1(f); or

          (ii) by Transatlantic pursuant to Section 8.1(g),

then, the non-terminating party shall reimburse the terminating party for all of their reasonable out-of-pocket fees and expenses (including all fees and expenses of counsel, accountants, investment bankers, experts and consultants) incurred by or on behalf of such terminating party in connection with or related to the authorization, preparation, investigation, negotiation, execution and performance of this Agreement and the transactions contemplated hereby (the “Expense Reimbursement”), up to a maximum amount of $35,000,000; provided that in the event this Agreement is terminated by Allied World pursuant to Section 8.1(f) on account of a breach of Section 5.5 or Section 6.1(d) or by Transatlantic pursuant to Section 8.1(g) on account of a breach of Section 5.5 or Section 6.1(e), then the non-terminating party shall, in addition to the Expense Reimbursement, pay the terminating party a fee equal to the Alternate Termination Fee; provided, further that the payment by either party of the Expense Reimbursement and/or the Alternate Termination Fee pursuant to this Section 6.6(b) shall not relieve such party of any subsequent obligation to pay the Termination Fee pursuant to Section 6.6(e)(iv) or Section 6.6(f)(iv), as applicable, except to the extent set-off of such amounts is permitted as indicated in the last sentence of Section 6.6(e) or Section 6.6(f), as applicable. The fees provided for in this Section 6.6(b) shall be paid by wire transfer of same day funds to an account designated by the recipient thereof within two Business Days after such termination.

               (c) In the event that this Agreement is terminated by Transatlantic or Allied World pursuant to Section 8.1(d), then, Transatlantic will pay Allied World (x) a fee equal to $35,000,000 (the “Alternate Termination Fee”) and (y) the Expense Reimbursement, by wire transfer of same day funds to an account designated by Allied World, within two Business Days after such termination; provided that (i) if Transatlantic or Allied World shall have the right to terminate this Agreement pursuant to Section 8.1(c), no such Alternate Termination Fee or Expense Reimbursement shall be due or payable and (ii) the payment by Transatlantic of the Alternate Termination Fee or Expense Reimbursement pursuant to this Section 6.6(c) shall not relieve Transatlantic of any subsequent obligation to pay the Termination Fee pursuant to Section 6.6(e)(ii), except to the extent set-off of such amounts is permitted as indicated in the last sentence of Section 6.6(e).

          (d) In the event that this Agreement is terminated by Transatlantic or Allied World pursuant to Section 8.1(c), then, Allied World will pay Transatlantic (x) the Alternate Termination Fee and (y) the Expense Reimbursement, by wire transfer of same day funds to an account designated by Transatlantic, within two Business Days after such termination; provided that (i) if Transatlantic or Allied World shall have the right to terminate this Agreement pursuant to Section 8.1(d), no such Alternate Termination Fee or Expense Reimbursement shall be due or payable and (ii) the payment by Allied World of the Alternate Termination Fee or Expense Reimbursement pursuant to this Section 6.6(d) shall not relieve Allied World of any subsequent obligation to pay the Termination Fee pursuant to Section 6.6(f)(ii), except to the extent set-off of such amounts is permitted as indicated in the last sentence of Section 6.6(f).

          (e) In the event that this Agreement is terminated:

          (i) by Allied World pursuant to Section 8.1(h);

          (ii) by Transatlantic or Allied World pursuant to Section 8.1(d) and (x) a proposal for a Competing Transaction has been made to Transatlantic or its stockholders or such a proposal (whether or not conditional) or an intention to make such a proposal has been publicly announced or has otherwise become publicly known after the date of this Agreement and prior to the Transatlantic Stockholders Meeting, and (y) within twelve (12) months after such termination, Transatlantic or any of its Subsidiaries enters into any definitive agreement in respect of any Competing Transaction, or recommends or submits a Competing Transaction to its stockholders for adoption, or a transaction in respect of a Competing Transaction is consummated, which, in each case, need not be the Competing Transaction that shall have been made, publicly announced or publicly made known prior to termination hereof; provided, however, for purposes of this clause (ii), any reference in the definition of Competing Transaction to 10% shall be deemed to be a reference to 50%;

          (iii) by Transatlantic or Allied World pursuant to Section 8.1(e) and (x) a proposal for a Competing Transaction has been made to Transatlantic or its stockholders or such a proposal (whether or not conditional) or an intention to make such a proposal has been publicly announced or has otherwise become publicly known after the date of this Agreement and prior to the End Date, (y) the Transatlantic Stockholders Meeting did not occur at least five Business Days prior to the End Date and (z) within twelve (12) months after such termination, Transatlantic or any of its Subsidiaries enters into any definitive agreement in respect of any Competing Transaction, or recommends or submits a Competing Transaction to its stockholders for adoption, or a transaction in respect of a Competing Transaction is consummated, which, in each case, need not be the Competing Transaction that shall have been made, publicly announced or publicly made known prior to termination hereof; provided, however, for purposes of this clause (iii), any reference in the definition of Competing Transaction to 10% shall be deemed to be a reference to 50%; or

          (iv) by Allied World pursuant to Section 8.1(f) and (x) a proposal for a Competing Transaction has been made to Transatlantic or its stockholders or such a proposal (whether or not conditional) or an intention to make such a proposal has been

publicly announced or has otherwise become publicly known after the date of this Agreement and prior to the date of termination (except in the event of a termination on account of a breach of Section 5.5 or Section 6.1(d), in which case a proposal for the Competing Transaction may be made or the intention to make such a proposal may be publicly announced or otherwise publicly known prior to or after the date of termination) and (y) within twelve (12) months after such termination, Transatlantic or any of its Subsidiaries enters into any definitive agreement in respect of any Competing Transaction, or recommends or submits a Competing Transaction to its stockholders for adoption, or a transaction in respect of a Competing Transaction is consummated, which, in each case, need not be the Competing Transaction that shall have been made, publicly announced or publicly made known prior to termination hereof; provided, however, for purposes of this clause (iv), any reference in the definition of Competing Transaction to 10% shall be deemed to be a reference to 50%,

then, Transatlantic will pay Allied World a fee equal to $115,000,000 (the “Termination Fee”), less the amount of any Expense Reimbursement and/or Alternate Termination Fee previously paid by Transatlantic to Allied World, by wire transfer of same day funds to an account designated by Allied World, in the case of a termination referred to in Section 6.6(e)(ii), Section 6.6(e)(iii) or Section 6.6(e)(iv), upon the execution of the definitive agreement, and in the case of a termination by Allied World referred to in Section 6.6(e)(i), within two Business Days after such termination.

               (f) In the event that this Agreement is terminated:

          (i) by Transatlantic pursuant to Section 8.1(i);

          (ii) by Allied World or Transatlantic pursuant to Section 8.1(c) and (x) a proposal for a Competing Transaction has been made to Allied World or its stockholders or such a proposal (whether or not conditional) or an intention to make such a proposal has been publicly announced or has otherwise become publicly known after the date of this Agreement and prior to the Allied World Stockholders Meeting, and (y) within twelve (12) months after such termination, Allied World or any of its Subsidiaries enters into any definitive agreement in respect of any Competing Transaction, or recommends or submits a Competing Transaction to its stockholders for adoption, or a transaction in respect of a Competing Transaction is consummated, which, in each case, need not be the Competing Transaction that shall have been made, publicly announced or publicly made known prior to termination hereof; provided, however, for purposes of this clause (ii), unless a Competing Transaction described in clauses (x) and (y) is made and consummated by the same Person (or any controlled Affiliate thereof), any reference in the definition of Competing Transaction to 10% shall be deemed to be a reference to 50%;

          (iii) by Allied World or Transatlantic pursuant to Section 8.1(e) and (x) a proposal for a Competing Transaction has been made to Allied World or its stockholders or such a proposal (whether or not conditional) or an intention to make such a proposal has been publicly announced or has otherwise become publicly known after the date of this Agreement and prior to the End Date, (y) the Allied World Stockholders

Meeting did not occur at least five Business Days prior to the End Date and (z) within twelve (12) months after such termination, Allied World or any of its Subsidiaries enters into any definitive agreement in respect of any Competing Transaction, or recommends or submits a Competing Transaction to its stockholders for adoption, or a transaction in respect of a Competing Transaction is consummated, which, in each case, need not be the Competing Transaction that shall have been made, publicly announced or publicly made known prior to termination hereof; provided, however, for purposes of this clause (iii), any reference in the definition of Competing Transaction to 10% shall be deemed to be a reference to 50%; or

          (iv) by Transatlantic pursuant to Section 8.1(g) and (x) a proposal for a Competing Transaction has been made to Allied World or its stockholders or such a proposal (whether or not conditional) or an intention to make such a proposal has been publicly announced or has otherwise become publicly known after the date of this Agreement and prior to the date of termination (except in the event of a termination on account of a breach of Section 5.5 or Section 6.1(e), in which case a proposal for the Competing Transaction may be made or the intention to make such a proposal may be publicly announced or otherwise publicly known prior to or after the date of termination) and (y) within twelve (12) months after such termination, Allied World or any of its Subsidiaries enters into any definitive agreement in respect of any Competing Transaction, or recommends or submits a Competing Transaction to its stockholders for adoption, or a transaction in respect of a Competing Transaction is consummated, which, in each case, need not be the Competing Transaction that shall have been made, publicly announced or publicly made known prior to termination hereof; provided, however, for purposes of this clause (iv), any reference in the definition of Competing Transaction to 10% shall be deemed to be a reference to 50%,

then, Allied World will pay Transatlantic the Termination Fee, less the amount of any Expense Reimbursement and/or Alternate Termination Fee previously paid by Allied World to Transatlantic, by wire transfer of same day funds to an account designated by Transatlantic, in the case of a termination referred to in Section 6.6(f)(ii), Section 6.6(f)(iii) or Section 6.6(f)(iv), upon the execution of the definitive agreement, and in the case of a termination by Transatlantic referred to in Section 6.6(f)(i), within two Business Days after such termination.

               (g) Each party acknowledges that the agreements contained in this Section 6.6 are an integral part of the transactions contemplated by this Agreement and that, without these agreements, the other party would not enter into this Agreement. Accordingly, if a party fails promptly to pay the amounts due pursuant to this Section 6.6 and, in order to obtain such payment, the other party commences a suit that results in a judgment against the non-paying party for the amounts set forth in this Section 6.6, the non-paying party will pay to the other party interest, from the date such payment was required to be made, on the amounts set forth in this Section 6.6 at a rate per annum equal to the three-month LIBOR (as reported in The Wall Street Journal (Northeast edition) or, if not reported therein, in another authoritative source selected by the party entitled to such amounts) on the date such payment was required to be made (or if no quotation for three-month LIBOR is available for such date, on the next preceding date for which such a quotation is available) plus 250 basis points. The parties acknowledge and agree that the neither the Termination Fee nor the Alternate Termination Fee shall constitute

either a penalty or liquidated damages, and the right of a party to receive, or the receipt of, the Termination Fee or the Alternate Termination Fee, as applicable, shall not limit or otherwise affect such party’s right to specific performance as provided in Section 9.10, such party’s rights as set forth in Section 8.2 or Section 9.7 or any other remedies that may be available for breaches of this Agreement, including breaches of Section 5.5 of this Agreement.

          6.7 Transaction Litigation. Transatlantic shall give Allied World the opportunity to participate in the defense or settlement of any stockholder litigation against Transatlantic and/or its directors relating to the Merger and the other transactions contemplated by this Agreement, and no such settlement shall be agreed to without the prior written consent of Allied World, which consent shall not be unreasonably withheld, conditioned or delayed. Allied World shall give Transatlantic the opportunity to participate in the defense or settlement of any stockholder litigation against Allied World and/or its directors relating to the Merger and the other transactions contemplated by this Agreement, and no such settlement shall be agreed to without the prior written consent of Transatlantic, which consent shall not be unreasonably withheld, conditioned or delayed. For purposes of this paragraph, “participate” means that the non-litigating party will be kept apprised of proposed strategy and other significant decisions with respect to the litigation by the litigating party, consistent with the common interest of Allied World and Transatlantic in these matters and the applicable privileges and protections provided therein, and the non-litigating party may offer comments or suggestions with respect to the litigation, but will not be afforded any decision making power or other authority over the litigation except for the settlement consent set forth above.

          6.8 Section 16 Matters. Prior to the Effective Time, Allied World, Transatlantic and Merger Sub each shall take all such steps as may be required to cause (a) any dispositions of Transatlantic Common Stock (including derivative securities with respect to Transatlantic Common Stock) resulting from the Merger and the other transactions contemplated by this Agreement, by each individual who will be subject to the reporting requirements of Section 16(a) of the Exchange Act with respect to Transatlantic immediately prior to the Effective Time to be exempt under Rule 16b-3 promulgated under the Exchange Act and (b) any acquisitions of Allied World Shares (including derivative securities with respect to Allied World Shares) resulting from the Merger and the other transactions contemplated by this Agreement, by each individual who may become subject to the reporting requirements of Section 16(a) of the Exchange Act with respect to Allied World to be exempt under Rule 16b-3 promulgated under the Exchange Act.

     6.9 Governance Matters.

               (a) Board of Directors. Allied World shall take all necessary action to cause, effective at the Effective Time, (i) the size of the Allied World Board to be increased so as to consist of 11 members and (ii) the Allied World Board to be comprised of (A) four Independent Transatlantic Directors, (B) Mr. Richard S. Press (or if he is not a member of the Transatlantic Board immediately prior to the Effective Time, another Independent Transatlantic Director), (C) Mr. Michael C. Sapnar (or if he is not a member of the Transatlantic Board immediately prior to the Effective Time, another director of Transatlantic immediately prior to the Effective Time selected by Transatlantic), (D) four Independent Allied World Directors, and (E) Mr. Scott A.

Carmilani (or if he is not a member of the Allied World Board immediately prior to the Effective Time, another director of Allied World immediately prior to the Effective Time selected by Allied World), with the six members set forth in clauses (A) through (C) and the five members set forth in clauses (D) and (E), respectively, to be divided into the three (3) classes of Allied World directors as nearly equal as possible (Class I, Class II and Class III), as set forth on Section 6.9(a) of the Transatlantic Disclosure Schedule (the “Reconstituted Allied World Board”).

          (b) Allied World Board Written Consent. At the Effective Time, Allied World and Transatlantic shall take all necessary action to cause the Reconstituted Allied World Board to deliver a duly executed written consent which shall approve the following (the “Reconstituted Allied World Board Written Consent”):

     (i) the election of Mr. Press as non-executive Chairman of the Reconstituted Allied World Board for a one-year term, unless he is not a member of the Transatlantic Board immediately prior to the Effective Time, in which case the non-executive Chairman to be elected for such one-year term shall be another Independent Transatlantic Director;

     (ii) the continuation of Mr. Carmilani as the President and Chief Executive Officer of Allied World, unless he is not the President and Chief Executive Officer of Allied World immediately prior to the Effective Time;

     (iii) the appointment of Mr. Sapnar to serve as the President and Chief Executive Officer of Global Reinsurance of Allied World, unless he is not the Chief Operating Officer of Transatlantic immediately prior to the Effective Time;

     (iv) the appointment of the persons listed on Section 6.9(b)(iv) of the Transatlantic Disclosure Schedule to the indicated positions and offices of Allied World set forth opposite their names, unless, with respect to a person listed on Section 6.9(b)(iv) of the Transatlantic Disclosure Schedule, such person is not an officer of either Transatlantic or Allied World, as the case may be, immediately prior the Effective Time;

     (v) that the Allied World Board have six board committees: the Audit Committee, the Compensation Committee, the Enterprise Risk Committee, the Executive Committee, the Investment Committee and the Nominating & Corporate Governance Committee;

     (vi) that, for a period of one year from the Closing Date, the Executive Committee shall be comprised of Mr. Carmilani (or if he is not a member of the Allied World Board immediately prior to the Effective Time, another member of the Allied World Board selected by Allied World prior to the Effective Time), one Independent Allied World Director selected by Allied World prior to the Effective Time, and two Independent Transatlantic Directors selected by Transatlantic prior to the Effective Time, and be chaired by Mr. Carmilani (or if he is not a member of the Allied World Board immediately prior to the Effective Time, another

Independent Allied World Director selected by Allied World prior to the Effective Time);

     (vii) that, for a period of one year from the Closing Date, each of the Investment Committee and Nominating & Corporate Governance Committee shall be comprised of two Independent Allied World Directors selected by Allied World prior to the Effective Time and two Independent Transatlantic Directors selected by Transatlantic prior to the Effective Time, and be chaired by one of the Independent Allied World Directors selected by Allied World prior to the Effective Time;

     (viii) that, for a period of one year from the Closing Date, each of the Audit Committee, Compensation Committee and Enterprise Risk Committee shall be comprised of two Independent Allied World Directors selected by Allied World prior to the Effective Time and two Independent Transatlantic Directors selected by Transatlantic prior to the Effective Time, and be chaired by one of the Independent Transatlantic Directors selected by Transatlantic prior to the Effective Time;

     (ix) that in connection with the annual general meeting of Allied World’s shareholders in 2012, the Reconstituted Allied World Board shall propose to increase the size of the Allied World Board by one member and shall nominate for election at such meeting, a new director to fill the resulting vacancy, who shall become the non-executive Chairman of the Allied World Board effective as of the first anniversary of the Closing Date; and that such person nominated for election at such meeting shall (A) have been approved by the Reconstituted Allied World Board, (B) have been recommended by the Nominating & Governance Committee of the Reconstituted Allied World Board, (C) have substantial insurance industry expertise, and (D) not have been a member of the Transatlantic Board or the Allied World Board immediately prior to the date of this Agreement; and further that Allied World shall duly call, give notice of, convene and hold its annual general meeting of shareholders in 2012 no later than June 30, 2012; and

     (x) the adoption of the organizational regulations in the form of Exhibit D hereto as the organizational regulations of Allied World, effective as of the Effective Time.

          (c) Non-Executive Chairman. Mr. Press has delivered to Allied World, simultaneously with the date hereof, an executed letter in the form set forth on Section 6.9(c) of the Transatlantic Disclosure Schedule.

          (d) Transatlantic Chief Executive Officer. Robert F. Orlich will retire as President and Chief Executive Officer of Transatlantic immediately prior to the Effective Time.

          (e) Headquarters. Following the Effective Time, the corporate headquarters for Allied World will be in Zug, Switzerland.

               (f) Vesting. Any Independent Transatlantic Director or Independent Allied World Director who ceases to be a director of the Reconstituted Allied World Board prior to the end of his or her term shall have immediate vesting of all of his or her unvested Allied World Stock-Based Awards.

          6.10 Retention Program and Employee Waivers. Prior to the Effective Time, Allied World shall use its reasonable best efforts to deliver to Transatlantic agreements, in form and substance reasonably satisfactory to Transatlantic, executed by each person listed on Schedule 6.10 of the Allied World Disclosure Schedule, providing that (a) any change in status or reduction of duties directly resulting from the transactions contemplated by this Agreement shall not constitute “good reason” for purposes of determining each such person’s entitlement to severance benefits or the acceleration of any vesting or other rights, and (b) the transactions contemplated by this Agreement will not, standing alone, result in the acceleration of any vesting or other rights for each such person; provided, that in the event that the waiver of any “nonqualified deferred compensation” (as defined in Section 409A of the Code) would result in the imposition of any penalty tax pursuant to Section 409A of the Code, such waiver shall not be effective unless the Reconstituted Allied World Board, in its sole discretion, provides for a gross-up of any such penalty taxes incurred by such person as a result of such waiver. Transatlantic and Allied World agree to use their reasonable best efforts to, (A) within 15 Business Days of the date hereof, individually (after consultation with the other, but each on terms and in amounts determined in its sole discretion) implement a retention program to assure the continued employment of certain key employees of Transatlantic and Allied World, as the case may be, which retention program may provide for, among other things, (i) a guarantee to such key employees of a continued level of compensation for a time period following the Closing, (ii) a retention award, that may be cash or stock-based, that will vest over a time period following the Closing, and (iii) a waiver, to the extent applicable, by such key employees to certain rights they may have to severance benefits or the acceleration of any vesting or other rights as a result of the transactions contemplated hereby and the integration of Allied World and Transatlantic after the Closing, and (B) prior to the Closing, jointly develop an approach to the use of employment agreements that will be substantially consistent for the senior management of the combined company.

          6.11 Transatlantic Common Stock Purchase. On or immediately following the date hereof, Allied World shall enter into a binding contract (the “Stock Purchase Contract”) with a third party broker to purchase a total of 45,000 shares of Transatlantic Common Stock in the open market for Allied World’s account (the “Transatlantic Common Stock Purchase”). The Transatlantic Common Stock Purchase will begin on the second trading day following the receipt of both the Allied World Requisite Stockholder Vote and the Transatlantic Requisite Stockholder Vote, and, if necessary, will continue on each of the two subsequent trading days thereafter, under the ordinary principles of best execution at the then-prevailing market price. Allied World shall not revoke, amend, grant a waiver or otherwise modify the terms of the Stock Purchase Contract, without the prior written consent of Transatlantic (not to be unreasonably withheld, delayed or conditioned).

          6.12 Cantonal Tax Ruling. Allied World shall use reasonable best efforts in obtaining, and Transatlantic shall use reasonable best efforts in supporting Allied World in

obtaining, on behalf of Allied World, prior to the Effective Time, a tax ruling from the Cantonal Tax Administration of the Canton of Zug providing that the Merger does not result in income Taxes for Allied World (and, in particular, the recording of the newly issued Allied World Shares in the Merger is not subject to income Taxes) (the “Cantonal Tax Ruling”). Allied World shall promptly provide Transatlantic with all information and documents necessary in connection with obtaining the Cantonal Tax Ruling and in furtherance thereof shall promptly inform Transatlantic of any developments which may affect the ruling process.

          6.13 Commercial Register Ruling. Allied World shall use reasonable best efforts in obtaining, and Transatlantic shall use reasonable best efforts in supporting Allied World in obtaining, on behalf of Allied World, prior to the Effective Time, a ruling from the Commercial Register of the Canton of Zug confirming that the Commercial Register will register a capital increase of Allied World (the “Commercial Register Ruling”). Allied World shall promptly provide Transatlantic with all information and documents necessary in connection with obtaining the Commercial Register Ruling and in furtherance thereof shall promptly inform Transatlantic of any developments which may affect the ruling process.

ARTICLE VII.
CONDITIONS PRECEDENT

     7.1 Conditions to Each Party’s Obligation to Effect the Merger. The respective obligations of the parties to effect the Merger shall be subject to the satisfaction, or waiver by each of the parties, at or prior to the Effective Time of the following conditions:

               (a) Allied World Requisite Stockholder Vote. The Allied World Requisite Stockholder Vote shall have been obtained.

               (b) Transatlantic Requisite Stockholder Vote. The Transatlantic Requisite Stockholder Vote shall have been obtained.

               (c) Listing. The Allied World Shares to be issued in the Merger and in respect of Transatlantic Rollover Options and Converted Transatlantic Stock-Based Awards, shall have been authorized for listing on the NYSE, subject to official notice of issuance.

               (d) Regulatory Approvals. (i) Any applicable waiting period (and any extension thereof) applicable to the Merger under the HSR Act shall have expired or been earlier terminated; (ii) all consents of Governmental Entities set forth in Section 7.1(d) of the Allied World Disclosure Schedule and Section 7.1(d) of the Transatlantic Disclosure Schedule shall have been obtained and shall be in full force and effect at the Closing; and (iii) all filings with Governmental Entities set forth in Section 7.1(d) of the Allied World Disclosure Schedule and Section 7.1(d) of the Transatlantic Disclosure Schedule shall have been made and any applicable waiting period thereunder shall have expired or been terminated, as the case may be (all such expirations, terminations, consents and filings collectively, the “Requisite Regulatory Approvals”). All other consents of, or filings with, or terminations or expirations of waiting periods imposed by, any Governmental Entity, including under applicable Antitrust Laws and

Insurance Laws, shall have been obtained, shall have been made or shall have terminated or expired, as the case may be, except where the failure to obtain or make such consents or filings, or the failure of such waiting periods to terminate or expire, would not reasonably be expected to be materially adverse to Allied World and its Subsidiaries and Transatlantic and its Subsidiaries, taken as a whole (after giving effect to the Merger).

               (e) Form S-4. The Form S-4 shall have become effective under the Securities Act, and no stop order suspending the effectiveness of the Form S-4 shall have been issued and no proceedings for that purpose shall have been initiated or be threatened by the SEC.

               (f) No Injunctions or Restraints. No statute, rule, regulation, executive order, decree, temporary restraining order, preliminary or permanent Injunction or other order enacted, entered, promulgated, enforced or issued by any Governmental Entity, or other legal restraint or prohibition shall be in effect preventing, the consummation of the Merger and the transactions contemplated by this Agreement.

               (g) Governance Matters. The Allied World Board Election Stockholder Approval shall have been obtained and not revoked and the Reconstituted Allied World Board Written Consent shall have been duly and fully executed, shall be in full force and effect and shall have been delivered to the corporate secretary of Allied World.

               (h) Commercial Register Ruling. The Commercial Register Ruling shall have been obtained.

               (i) Transatlantic Common Stock Purchase. The Transatlantic Common Stock Purchase shall have been consummated.

          7.2 Conditions to Obligations of Allied World. The obligation of Allied World to effect the Merger is also subject to the satisfaction, or waiver by Allied World, at or prior to the Effective Time of the following conditions:

               (a) Representations and Warranties. (i) Each of the representations and warranties of Transatlantic set forth in Section 4.2, Section 4.3 and Section 4.21 of this Agreement shall be true and correct in all material respects on the date of this Agreement, and as of the Closing Date, as if made at and as of such date (except to the extent that any such representation or warranty speaks as of an earlier date, in which case such representation or warranty shall be true and correct as of such earlier date), and (ii) the other representations and warranties of Transatlantic set forth in this Agreement shall be true and correct in all respects on the date of this Agreement, and as of the Closing Date, as if made at and as of such date (except to the extent that any such representation or warranty speaks as of an earlier date, in which case such representation or warranty shall be true and correct as of such earlier date), except where the failure of such representations and warranties to be so true and correct (without giving effect to any limitation as to “materiality” or “Transatlantic Material Adverse Effect” set forth therein), individually or in the aggregate, has not had, and would not reasonably be expected to have, a Transatlantic Material Adverse Effect, and Allied World shall have received a certificate signed on behalf of Transatlantic by the Chief Executive Officer or the Chief Financial Officer of Transatlantic to the foregoing effects.

               (b) Performance of Obligations of Transatlantic. Transatlantic shall have performed in all material respects all material obligations required to be performed by it under this Agreement at or prior to the Closing Date, and Allied World shall have received a certificate signed on behalf of Transatlantic by the Chief Executive Officer or the Chief Financial Officer of Transatlantic to such effect.

          7.3 Conditions to Obligations of Transatlantic. The obligation of Transatlantic to effect the Merger is also subject to the satisfaction, or waiver by Transatlantic, at or prior to the Effective Time, of the following conditions:

               (a) Representations and Warranties. (i) Each of the representations and warranties of Allied World set forth in Section 3.2, Section 3.3 and Section 3.21 of this Agreement shall be true and correct in all material respects on the date of this Agreement, and as of the Closing Date, as if made at and as of such date (except to the extent that any such representation or warranty speaks as of an earlier date, in which case such representation or warranty shall be true and correct as of such earlier date), and (ii) the other representations and warranties of Allied World set forth in this Agreement shall be true and correct in all respects on the date of this Agreement, and as of the Closing Date, as if made at and as of such date (except to the extent that any such representation or warranty speaks as of an earlier date, in which case such representation or warranty shall be true and correct as of such earlier date), except where the failure of such representations and warranties to be so true and correct (without giving effect to any limitation as to “materiality” or “Allied World Material Adverse Effect” set forth therein), individually or in the aggregate, has not had, and would not reasonably be expected to have, an Allied World Material Adverse Effect, and Transatlantic shall have received a certificate signed on behalf of Allied World by the Chief Executive Officer or the Chief Financial Officer of Allied World to the foregoing effects.

               (b) Performance of Obligations of Allied World. Allied World shall have performed in all material respects all material obligations required to be performed by it under this Agreement at or prior to the Closing Date, and Transatlantic shall have received a certificate signed on behalf of Allied World by the Chief Executive Officer or the Chief Financial Officer of Allied World to such effect.

ARTICLE VIII.
TERMINATION AND AMENDMENT

          8.1 Termination. This Agreement may be terminated at any time prior to the Effective Time, whether before or after receipt of the Allied World Requisite Stockholder Vote or the Transatlantic Requisite Stockholder Vote, by action taken or authorized by the Board of Directors of the terminating party or parties:

               (a) by mutual consent of Allied World and Transatlantic in a written instrument, if the Board of Directors of each so determines;

               (b) by either the Allied World Board or the Transatlantic Board, if any Governmental Entity of competent jurisdiction shall have issued a final and nonappealable Order permanently enjoining or otherwise prohibiting the consummation of the transactions

contemplated by this Agreement, except that no party may terminate this Agreement pursuant to this Section 8.1(b) if such party’s breach of its obligations under this Agreement proximately contributed to the occurrence of such Order;

               (c) by either the Allied World Board or the Transatlantic Board, if the Allied World Stockholder Requisite Vote shall not have been obtained at an Allied World Stockholders Meeting or any adjournment or postponement thereof at which the vote was taken;

               (d) by either the Allied World Board or the Transatlantic Board, if the Transatlantic Stockholder Requisite Vote shall not have been obtained at a Transatlantic Stockholders Meeting or any adjournment or postponement thereof at which the vote was taken;

               (e) by either the Allied World Board or the Transatlantic Board, if the Merger shall not have been consummated on or before January 31, 2012, subject to extension by the mutual agreement of Allied World and Transatlantic (the “End Date”); provided, however, that no party may terminate this Agreement pursuant to this Section 8.1(e) if such party’s breach of its obligations under this Agreement proximately contributed to the failure of the Closing to occur by the End Date;

               (f) by the Allied World Board, if there shall have been a breach of any of the covenants or agreements or any inaccuracy of any of the representations or warranties set forth in this Agreement on the part of Transatlantic, which breach or inaccuracy, either individually or in the aggregate, would result in, if occurring or continuing on the Closing Date, the failure of the conditions set forth in Section 7.2(a) or (b), unless such failure is reasonably capable of being cured, and Transatlantic is continuing to use its reasonable best efforts to cure such failure, by the End Date;

               (g) by the Transatlantic Board, if there shall have been a breach of any of the covenants or agreements or any inaccuracy of any of the representations or warranties set forth in this Agreement on the part of Allied World, which breach or inaccuracy, either individually or in the aggregate, would result in, if occurring or continuing on the Closing Date, the failure of the conditions set forth in Section 7.3(a) or (b), unless such failure is reasonably capable of being cured, and Allied World is continuing to use its reasonable best efforts to cure such failure, by the End Date;

               (h) by the Allied World Board, in the event of an Adverse Recommendation Change by Transatlantic; or

               (i) by the Transatlantic Board, in the event of an Adverse Recommendation Change by Allied World.

          8.2 Effect of Termination. In the event of termination of this Agreement by either Allied World or Transatlantic in accordance with Section 8.1, this Agreement shall forthwith become void and have no effect, and none of Allied World, Merger Sub, Transatlantic, any of their respective Subsidiaries or Affiliates or any of the officers or directors of any of the foregoing shall have any liability of any nature whatsoever under this Agreement, or in connection with the transactions contemplated by this Agreement, except that Section 3.21, Section 4.21, Section 6.6, and Article IX (other than Section 9.14) shall

survive any termination of this Agreement; provided, however, that nothing contained in this Section 8.2 shall relieve any party hereto from any liability for any willful breach of a representation or warranty or any willful breach of any covenant contained in this Agreement. No termination of this Agreement shall affect the obligations of the parties contained in the Confidentiality Agreement, all of which obligations shall survive termination of this Agreement in accordance with their terms.

          8.3 Amendment. Subject to compliance with applicable Law, this Agreement may be amended by Allied World, Merger Sub and Transatlantic, by action taken or authorized by their respective Boards of Directors, at any time before or after the Transatlantic Requisite Stockholder Vote or the Allied World Requisite Stockholder Vote; provided, however, that after the Transatlantic Requisite Stockholder Vote or the Allied World Requisite Stockholder Vote has been obtained, there may not be, without further approval of the stockholders of Transatlantic or Allied World, any amendment of this Agreement that changes the amount or the form of the consideration to be delivered under this Agreement to the holders of Transatlantic Common Stock, or which by applicable Law otherwise requires the further approval of such stockholders. This Agreement may not be amended except by an instrument in writing signed on behalf of each of the parties.

          8.4 Extension; Waiver. At any time prior to the Effective Time, Allied World (on behalf of itself and Merger Sub) and Transatlantic may, to the extent legally allowed, (a) extend the time for the performance of any of the obligations or other acts of the other party, (b) waive any inaccuracies in the representations and warranties contained in this Agreement, and (c) waive compliance with any of the agreements or conditions contained in this Agreement. Any agreement on the part of a party to any such extension or waiver will be valid only if set forth in a written instrument signed by an authorized officer on behalf of such party, but such extension or waiver or failure to insist on strict compliance with an obligation, covenant, agreement or condition will not operate as a waiver of, or estoppel with respect to, any subsequent or other failure.

ARTICLE IX.
GENERAL PROVISIONS

          9.1 Nonsurvival of Representations and Warranties. None of the representations, warranties, covenants or agreements in this Agreement or in any instrument delivered pursuant to this Agreement shall survive the Effective Time, other than those covenants or agreements of the parties which by their terms apply, or are to be performed in whole or in part, after the Effective Time.

          9.2 Notices. All notices and other communications hereunder shall be in writing and shall be deemed duly given (a) on the date of delivery if delivered personally, or if by facsimile, upon written confirmation of receipt by facsimile, (b) on the first Business Day following the date of dispatch if delivered utilizing a next-day service by a recognized next-day courier or (c) on the earlier of confirmed receipt or the fifth Business Day following the date of mailing if delivered by registered or certified mail, return receipt requested, postage prepaid. All notices hereunder shall be delivered to the addresses set

forth below, or pursuant to such other instructions as may be designated in writing by the party to receive such notice:

	(a)		if to Allied World or Merger Sub, to:
			Allied World Assurance Company Holdings, AG
			Lindenstrasse 8
			6340 Baar, Zug
			Switzerland
			Phone: 41 ###-###-####
			Facsimile: (441)  ###-###-####
			Attention: General Counsel
			with a copy (which shall not constitute notice) to:
			Willkie Farr & Gallagher LLP
			787 Seventh Avenue
			New York, NY 10019
			Phone: (212)  ###-###-####
			Facsimile: (212)  ###-###-####
			Attention: Steven A. Seidman, Esq.
			Jeffrey Hochman, Esq.
	(b)		if to Transatlantic, to:
			Transatlantic Holdings, Inc.
			80 Pine Street
			New York, New York 10005
			Phone: (212)  ###-###-####
			Facsimile: (212)  ###-###-####
			Attention: General Counsel
			with a copy (which shall not constitute notice) to:
			Gibson, Dunn & Crutcher LLP
			200 Park Avenue
			New York, NY 10166
			Phone: (212)  ###-###-####
			Facsimile: (212)  ###-###-####
			Attention: Lois Herzeca, Esq.

          9.3 Definitions. Capitalized terms used in this Agreement shall have the respective meanings ascribed thereto in the sections of this Agreement set forth next to such terms on Annex A hereto. For purposes of this Agreement:

               “Affiliate” of any Person means another Person that directly or indirectly, through one or more intermediaries, controls, is controlled by, or is under common control with, such first Person.

               “Allied World Board Election Stockholder Approval” means the election of all the members of the Allied World Board specified in Section 6.9(a) at the Allied World Stockholders Meeting with the affirmative vote of at least 50% of the votes cast at a meeting where holders of at least 50% of the total outstanding Allied World Shares are represented and voting.

               “Allied World Capital Stock” means the Allied World Shares and the Participation Certificates.

               “Allied World Material Adverse Effect” means any change, state of facts, circumstance, event or effect that, individually or in the aggregate, is materially adverse to (A) the financial condition, properties, assets, liabilities, obligations (whether accrued, absolute, contingent or otherwise), businesses or results of operations of Allied World and the Allied World Subsidiaries, taken as a whole, excluding any such change, state of facts, circumstance, event or effect to the extent caused by or resulting from (i) the execution, delivery and announcement of this Agreement and the transactions contemplated hereby, including (x) any loss of, or adverse change in, the relationship of Allied World or any Allied World Subsidiary with its customers, employees, brokers, agents or other producers, suppliers, financing sources, business partners or regulators caused by the identity of Transatlantic or any Transatlantic Subsidiary as a party to the transactions contemplated by this Agreement or (y) compliance with the terms of this Agreement, (ii) changes in economic, market, business, regulatory or political conditions generally in the United States, Bermuda, Switzerland or any other jurisdiction in which Allied World and the Allied World Subsidiaries operate or in the United States or global financial markets, (iii) changes, circumstances or events generally affecting the property and casualty insurance or reinsurance industry in the geographic areas in which Allied World and the Allied World Subsidiaries operate, (iv) changes, circumstances or events resulting in liabilities under property catastrophe insurance agreements to which Allied World or any Allied World Subsidiary is a party, including any effects resulting from any earthquake, hurricane, tornado, windstorm, terrorist act, act of war or other natural or man-made disaster, (v) the commencement, occurrence, continuation of any war or armed hostilities, (vi) changes in any Law following the date hereof, (vii) changes in GAAP or SAP following the date hereof (or local equivalents in the applicable jurisdiction) prescribed by the applicable insurance regulatory authority, including accounting and financial reporting pronouncements by the SEC, the National Association of Insurance Commissioners and the Financial Accounting Standards Board, (viii) any change or announcement of a potential change in Allied World’s or any Allied World Subsidiaries’ credit or claims paying rating or A.M. Best Company rating or the ratings of any of Allied World or any Allied World Subsidiaries’ businesses or securities (provided that this exception shall not prevent or otherwise affect a determination that any changes, state of facts, circumstances, events or effects underlying a change described in this clause (viii) has resulted in, or contributed to, an Allied World Material Adverse Effect), (ix) a suspension in trading or a change in the trading prices of Allied World Capital Stock (provided that this exception shall not prevent or otherwise affect a determination that any changes, state of facts, circumstances, events or effects underlying a change described in this clause (ix) has resulted in, or contributed to, an Allied World Material Adverse Effect), (x) the failure to meet any revenue, earnings or other projections, forecasts or predictions for any period ending after the date of this Agreement (provided that this exception shall not prevent or otherwise affect a determination that any state of facts, circumstances, events or effects underlying a failure described in this clause (x) has

resulted in, or contributed to, an Allied World Material Adverse Effect), or (xi) any action or failure to act expressly required to be taken by a party pursuant to the terms of this Agreement, except in the case of the foregoing clauses (ii), (iii), (iv), and (v) to the extent those changes, state of facts, circumstances, events, or effects have a materially disproportionate effect on Allied World and the Allied World Subsidiaries taken as a whole relative to other companies of similar size operating in the property and casualty insurance industry in similar geographic areas to those in which Allied World and the Allied World Subsidiaries operate, and/or (B) the ability of such party to perform its obligations under this Agreement.

               “Allied World Permits” means all governmental licenses, authorizations, permits, certificates, registrations, consents, franchises, variances, exemptions, Orders and approvals required to own, lease and operate Allied World and its Subsidiaries’ respective properties and to carry on their respective businesses as currently conducted.

               “Allied World RSU” means the restricted stock units and performance units of Allied World issued pursuant to the Allied World Stock Plans.

               “Allied World Secured Credit Facility” means that certain Credit Agreement, dated as of November 27, 2007, as amended by the First Amendment to Credit Agreement dated as of February 25, 2010 and the Second Amendment to Credit Agreement dated as of November 30, 2010, among the Prior Allied World Parent, Allied World Assurance Company, Ltd, Allied World, the Lenders party thereto, Bank of America, N.A. and Wells Fargo Bank, National Association.

               “Allied World Stock-Based Award” means Allied World Shares and other compensatory awards denominated in Allied World Shares subject to a risk of forfeiture to, or right of repurchase by, Allied World, including, for the avoidance of doubt, Allied World RSUs, Allied World Stock Options, performance-based awards granted under the Allied World Stock Plans and rights to subscribe for Allied World Shares under Allied World’s 2008 Amended and Restated Employee Share Purchase Plan.

               “Allied World Stock Option” means any option to purchase Allied World Shares granted under any Allied World Stock Plan.

               “Allied World Stock Plans” means the equity-based compensation plans identified in Section 9.3 of the Allied World Disclosure Schedule.

               “Allied World Unsecured Credit Facility” means that certain Credit Agreement, dated as of November 27, 2007, as amended by the First Amendment to Credit Agreement dated as of February 25, 2010 and the Second Amendment to Credit Agreement dated as of November 30, 2010, among the Prior Allied World Parent, Allied World Assurance Company, Ltd, Allied World, the Lenders party thereto, Bank of America, N.A. and Wells Fargo Bank, National Association.

               “Antitrust Law” means the HSR Act and the Laws of Turkey, Germany, United Kingdom, Portugal, Spain, Israel, Taiwan, Australia, New Zealand, Canada, Brazil, Italy, and Saudi Arabia that are designed or intended to prohibit, restrict or regulate actions having the purpose or effect of monopolization or restraint of trade or lessening of competition through

merger or acquisition. Antitrust Law shall include the European Community Council Regulation No. 139/2004 if the parties agree to filing a request to the European Commission to assert exclusive jurisdiction over the approval of the Merger within the European Union in lieu of separate EU Member State filings, and that filing request is not opposed by any of the applicable Member States.

               “Business Day” means any day other than (i) a Saturday or a Sunday or (ii) a day on which banking and savings and loan institutions are authorized or required by Law to be closed in New York City or Zug, Switzerland.

               “Contract” means all oral or written contracts, agreements, commitments, arrangements, leases and other instruments to which any Person is a party.

               “Environmental Law” means any foreign, federal, state or local law, treaty, statute, rule, regulation, Order, ordinance, decree, Injunction, judgment, governmental restriction or any other requirement of Law (including common law) regulating or relating to the protection of human health from exposure to any hazardous substance, natural resource damages or the protection of the environment, including Laws relating to the protection of wetlands, pollution, contamination or the use, generation, management, handling, transport, treatment, disposal, storage, release or threatened release of hazardous substances.

               “Equity Equivalents” of any Person means (x) any securities convertible into or exchangeable for, or any warrants or options or other rights to acquire, any capital stock, voting securities or equity interests of such Person, (y) any warrants or options or other rights to acquire from such Person, or any other obligation of such Person to issue, deliver or sell, or cause to be issued, delivered or sold, any capital stock, voting securities or other equity interests in such Person or (z) any rights that are linked in any way to the price of any capital stock of, or to the value of or of any part of, or to any dividends or distributions paid on any capital stock of, such Person.

               “Exchange Act” means the Securities Exchange Act of 1934, as amended.

               “Forfeitures and Cashless Settlements” by any Person means (x) the forfeiture or satisfaction of Stock-Based Awards of such Person, (y) the acceptance by such Person of shares of common stock of such Person as payment for the exercise price of Stock Options of such Person and (z) the acceptance by such Person of shares of common stock of such Person for withholding Taxes incurred in connection with the exercise of Stock Options of such Person or the vesting or satisfaction of Stock-Based Awards of such Person, in each case, in accordance with past practice of such Person and the terms of the applicable award agreements.

               “GAAP” means United States generally accepted accounting principles, consistently applied.

               “Governmental Entity” means any nation or government, any state, agency, commission, or other political subdivision thereof, any insurance regulatory authority, any self-regulatory authority, or any entity (including a court) of competent jurisdiction properly exercising executive, legislative, judicial or administration functions of the government.

               “Independent Director” of any corporation means a director of such corporation who qualifies as an independent director under the listing standards of the principal market on which the common stock of such corporation is listed or quoted for trading and does not possess an interest in any transaction for which disclosure would be required pursuant to Rule 404(a) of Regulation S-K.

               “Independent Allied World Director” means each of the Independent Directors of Allied World serving as a director of Allied World immediately prior to the Effective Time who is selected by Allied World to serve as a director of Allied World immediately following the Effective Time.

               “Independent Transatlantic Director” means each of the Independent Directors of Transatlantic serving as a director of Transatlantic immediately prior to the Effective Time who is selected by Transatlantic to serve as a director of Allied World immediately following the Effective Time.

               “Injunction” means any Order, injunction or decree issued by any court or agency of competent jurisdiction or other legal restraint or prohibition.

               “Insurance Law” means all Laws, rules and regulations applicable to the business of insurance or the regulation of insurance holding companies, whether domestic or foreign, and all applicable orders and directives of Governmental Entities and market conduct recommendations resulting from market conduct examinations of Insurance Regulators.

               “Insurance Regulators” means all Governmental Entities regulating the business of insurance under the Insurance Laws.

               “Intellectual Property” means: (a) trademarks, service marks, logos, trade names and trade dress, and all goodwill associated with the foregoing, (b) domain names, (c) copyrights, copyrightable works, software and computer programs, (d) patents, inventions, discoveries, proprietary methods and processes, (e) trade secrets, (f) know-how, (g) proprietary information, (h) all registrations and applications for registration of any of the foregoing, and (i) all similar proprietary rights.

               “knowledge of Allied World” or “knowledge” when used in reference to Allied World means the actual knowledge of those individuals listed in Section 9.3 of the Allied World Disclosure Schedule.

               “knowledge of Transatlantic” or “knowledge” when used in reference to Transatlantic means the actual knowledge of those individuals listed in Section 9.3 of the Transatlantic Disclosure Schedule.

               “Law” means any statute, law, ordinance, rule or regulation (domestic or foreign) issued, promulgated or entered into by or with any Governmental Entity.

               “Order” means any order, writ, Injunction, decree, judgment or stipulation issued, promulgated or entered into by or with any Governmental Entity.

               “Organizational Documents” means, with respect to any Person, its articles of incorporation, memorandum of association, bylaws or other similar organizational documents.

               “Permitted Liens” means (a) any Liens for Taxes or other governmental charges not yet due and payable or the amount of which is being contested in good faith by appropriate proceedings, (b) carriers’, warehousemen’s, mechanics’, materialmen’s, repairmen’s, workmen’s, landlords’ or other similar Liens, (c) pledges or deposits in the ordinary course of business and on a basis consistent with past practice in connection with workers’ compensation, unemployment insurance or other social security legislation, (d) non-monetary Liens that do not, individually or in the aggregate, materially impair the continued or contemplated use or operation of the property to which they relate, (e) statutory Liens arising by operation of Law with respect to a liability incurred in the ordinary course of business on a basis consistent with past practice which is not yet due or payable or which is being contested in good faith by appropriate proceedings, (f) immaterial easements, rights of way or other similar matters or restrictions or exclusions that would be shown by a current title report or other similar report and that do not, individually or in the aggregate, materially impair the continued or contemplated use or operation of the property to which they relate, (g) transfer restrictions imposed by applicable securities laws and (h) Liens listed in Section 9.3 of the Allied World Disclosure Schedule or Section 9.3 of the Transatlantic Disclosure Schedule, as applicable.

               “Person” means any natural person, firm, corporation, partnership, company, limited liability company, trust, joint venture, association, Governmental Entity or other entity.

               “Representatives” means, with respect to any party, collectively, each of such party’s Subsidiaries, each of such party’s and its Subsidiaries’ respective officers, directors and employees, investment bankers, financial advisors, attorneys, accountants or other advisor, agent, consultant, representative of such party or any of its controlled Affiliates.

               “SAP” means statutory accounting principals prescribed or permitted by the domiciliary state insurance department of the applicable Allied World P/C Subsidiary or Transatlantic P/C Subsidiary, as the case may be.

               “Securities Act” means the Securities Act of 1933, as amended.

               “Share Issuance” means the issuance pursuant to the Form S-4 by Allied World of Allied World Shares as Merger Consideration.

               “Stock-Based Awards” means the Transatlantic Stock-Based Awards and the Allied World Stock-Based Awards.

               “Stock Options” means the Transatlantic Stock Options and the Allied World Stock Options.

               “Substantial Compliance” means “substantial compliance” as such term is used in the HSR Act.

               “Tax” means all income, gross receipts, franchise, sales, use, ad valorem, property, payroll, withholding, excise, severance, transfer, employment, estimated, alternative or

add-on minimum, value added, stamp, occupation, premium, environmental and windfall profits taxes, and other taxes, charges, fees, levies, imposts, customs, duties, licenses or other assessments, together with any interest, additions to tax, and any penalties.

               “Tax Return” means any statement, report, return, information return or claim for refund relating to Taxes (including any elections, declarations, schedules or attachments thereto), including, if applicable, any combined or consolidated return for any group of entities that includes Allied World or any of its Subsidiaries, or Transatlantic or any of its Subsidiaries.

               “Taxing Authority” means, with respect to any Tax, the Governmental Entity that imposes such Tax, and the agency (if any) charged with the collection of such Tax for such Governmental Entity.

               “Transatlantic Material Adverse Effect” means any change, state of facts, circumstance, event or effect that, individually or in the aggregate, is materially adverse to (A) the financial condition, properties, assets, liabilities, obligations (whether accrued, absolute, contingent or otherwise), businesses or results of operations of Transatlantic and the Transatlantic Subsidiaries, taken as a whole, excluding any such change, state of facts, circumstance, event or effect to the extent caused by or resulting from (i) the execution, delivery and announcement of this Agreement and the transactions contemplated hereby, including (x) any loss of, or adverse change in, the relationship of Transatlantic or any Transatlantic Subsidiary with its customers, employees, brokers, agents or other producers, suppliers, financing sources, business partners or regulators caused by the identity of Allied World or any Allied World Subsidiary as a party to the transactions contemplated by this Agreement or (y) compliance with the terms of this Agreement, (ii) changes in economic, market, business, regulatory or political conditions generally in the United States or any other jurisdiction in which Transatlantic or any Transatlantic Subsidiary operates or in the United States or global financial markets, (iii) changes, circumstances or events generally affecting the property and casualty reinsurance industry in the geographic areas in which Transatlantic and the Transatlantic Subsidiaries operate, (iv) changes, circumstances or events resulting in liabilities under property catastrophe reinsurance agreements to which Transatlantic or any Transatlantic Subsidiary is a party, including any effects resulting from any earthquake, hurricane, tornado, windstorm, terrorist act, act of war or other natural or man-made disaster, (v) the commencement, occurrence, continuation of any war or armed hostilities, (vi) changes in any Law following the date hereof, (vii) changes in GAAP or SAP following the date hereof (or local equivalents in the applicable jurisdiction) prescribed by the applicable insurance regulatory authority, including accounting and financial reporting pronouncements by the SEC, the National Association of Insurance Commissioners and the Financial Accounting Standards Board, (viii) any change or announcement of a potential change in Transatlantic’s or any Transatlantic Subsidiaries’ credit or claims paying rating or A.M. Best Company rating or the ratings of any of Transatlantic or any Transatlantic Subsidiaries’ businesses or securities (provided that this exception shall not prevent or otherwise affect a determination that any changes, state of facts, circumstances, events or effects underlying a change described in this clause (viii) has resulted in, or contributed to, a Transatlantic Material Adverse Effect), (ix) a suspension of trading or a change in the trading prices of Transatlantic Common Stock (provided that this exception shall not prevent or otherwise affect a determination that any changes, state of facts, circumstances, events or effects underlying a change described in this clause (ix) has resulted in, or contributed to, a Transatlantic

Material Adverse Effect), (x) the failure to meet any revenue, earnings or other projections, forecasts or predictions for any period ending after the date of this Agreement (provided that this exception shall not prevent or otherwise affect a determination that any state of facts, circumstances, events or effects underlying a failure described in this clause (x) has resulted in, or contributed to, a Transatlantic Material Adverse Effect), or (xi) any action or failure to act expressly required to be taken by a party pursuant to the terms of this Agreement, except in the case of the foregoing clauses (ii), (iii), (iv), and (v) to the extent those changes, state of facts, circumstances, events, or effects have a materially disproportionate effect on Transatlantic and the Transatlantic Subsidiaries taken as a whole relative to other companies of similar size operating in the property and casualty reinsurance industry in similar geographic areas to those in which Transatlantic and the Transatlantic Subsidiaries operate, and/or (B) the ability of such party to perform its obligations under this Agreement.

               “Transatlantic Permits” means all governmental licenses, authorizations, permits, certificates, registrations, consents, franchises, variances, exemptions, Orders and approvals required to own, lease and operate Transatlantic and its Subsidiaries’ respective properties and to carry on their respective businesses as currently conducted.

               “Transatlantic Restricted Shares” means the restricted stock of Transatlantic issued pursuant to the Transatlantic Stock Plans.

               “Transatlantic RSU” means the restricted stock units of Transatlantic issued pursuant to the Transatlantic Stock Plans.

               “Transatlantic SAR” means the stock appreciation rights of Transatlantic issued pursuant to the Transatlantic Stock Plans.

               “Transatlantic Stock-Based Award” means shares of Transatlantic Common Stock and other compensatory awards denominated in shares of Transatlantic Common Stock subject to a risk of forfeiture to, or right of repurchase by, Transatlantic, including, for the avoidance of doubt, all Transatlantic Restricted Shares, Transatlantic RSUs, Transatlantic SARs, and Transatlantic Stock Options.

               “Transatlantic Stock Option” means any option to purchase Transatlantic Common Stock granted under any Transatlantic Stock Plan.

               “Transatlantic Stock Plans” means the equity-based compensation plans identified in Section 9.3 of the Transatlantic Disclosure Schedule.

          9.4 Interpretation. When a reference is made in this Agreement to a Section, Article or Exhibit such reference shall be to a Section, Article or Exhibit of this Agreement, unless otherwise indicated. The table of contents and headings contained in this Agreement or in any Exhibit are for convenience of reference purposes only and shall not affect in any way the meaning or interpretation of this Agreement. All words used in this Agreement will be construed to be of such gender or number as the circumstances require. Any capitalized terms used in any Exhibit but not otherwise defined therein shall have the meaning set forth in this Agreement. All Exhibits annexed hereto or referred to herein are hereby incorporated in and made a part of this Agreement as if set forth herein. The word “including” and words

of similar import when used in this Agreement will mean “including, without limitation,” unless otherwise specified. All references to “dollars” or “$” or “US$” in this Agreement refer to the lawful currency of the United States and all references to “CHF” in this Agreement refer to the lawful currency of Switzerland. The words “made available” shall include, without limitation, those documents or information made available in an electronic dataroom or website or in a physical dataroom, in each case, to which the intended recipient or its representatives had access, or such item was otherwise available on the SEC’s public website (www.sec.gov).

          9.5 Severability. Whenever possible, each provision or portion of any provision of this Agreement shall be interpreted in such manner as to be effective and valid under applicable Law, but if any provision or portion of any provision of this Agreement is held to be invalid, illegal or unenforceable in any respect under any applicable Law or rule in any jurisdiction, such invalidity, illegality or unenforceability shall not affect any other provision or portion of any provision in such jurisdiction, and this Agreement shall be reformed, construed and enforced in such jurisdiction as if such invalid, illegal or unenforceable provision or portion of any provision had never been contained herein.

          9.6 Counterparts. This Agreement may be executed in two or more counterparts, all of which shall be considered one and the same instrument and shall become effective when one or more counterparts have been signed by each of the parties and delivered to the other party. This Agreement may be executed by facsimile or electronic transmission signature and a facsimile or electronic transmission signature shall constitute an original for all purposes.

          9.7 Entire Agreement; No Third-Party Beneficiaries. This Agreement (including the Exhibits and Annexes hereto), taken together with the Transatlantic Disclosure Schedule and the Allied World Disclosure Schedule, and the Confidentiality Agreement, (a) constitute the entire agreement, and supersedes all prior agreements (other than the Confidentiality Agreement) and understandings, both written and oral, among the parties with respect to the Merger and the other transactions contemplated by this Agreement and (b) is not intended to confer upon any Person other than the parties any rights or remedies other than as specifically provided in Section 6.5.

          9.8 Governing Law. This Agreement and all disputes or controversies arising out of or relating to this Agreement or the transactions contemplated hereby shall be governed by, and construed in accordance with, the internal laws of the State of Delaware, without regard to the laws of any other jurisdiction that might be applied because of the conflicts of laws principles of the State of Delaware.

     9.9 Assignment; Successors; Tax Treatment.

               (a) Except as provided in Section 9.9(b), neither this Agreement nor any of the rights, interests or obligations under this Agreement may be assigned or delegated, in whole or in part, by operation of law or otherwise, by any party without the prior written consent of the other parties, and any such assignment without such prior written consent shall be null and void.

Subject to the preceding sentence, this Agreement will be binding upon, inure to the benefit of, and be enforceable by, the parties and their respective successors and assigns.

               (b) It is contemplated that Merger Sub will be owned by a corporate subsidiary (“Newco Holdings”) that is itself wholly-owned by Allied World at least in part through one or more other wholly-owned corporate subsidiaries. Allied World may assign its obligations to deliver Allied World Shares and cash set forth in Section 2.2(a) to Newco Holdings. Any such assignment shall not relieve Allied World of its obligations under this Agreement.

               (c) The parties intend the Merger to be treated for United States federal income Tax purposes as a fully taxable purchase of Transatlantic Common Stock by Newco Holdings and not qualify as a reorganization within the meaning of Section 368(a) of the Code (without regard to Section 367 of the Code) and to file all U.S. Tax Returns consistent with such treatment.

          9.10 Specific Enforcement. The parties agree that irreparable damage would occur in the event that any of the provisions of this Agreement were not performed in accordance with their specific terms or were otherwise breached. Accordingly, each of the parties shall be entitled to specific performance of the terms hereof, including an Injunction or Injunctions to prevent breaches of this Agreement and to enforce specifically the terms and provisions of this Agreement in the Court of Chancery of the State of Delaware, provided that if jurisdiction is not then available in the Court of Chancery of the State of Delaware, then in any federal court located in the State of Delaware, this being in addition to any other remedy to which such party is entitled at law or in equity. The parties further agree not to assert that a remedy of specific enforcement is unenforceable, invalid, contrary to Law or inequitable for any reason, nor to object to a remedy of specific performance on the basis that a remedy of monetary damages would provide an adequate remedy for any such breach. Each party further acknowledges and agrees that the agreements contained in this Section 9.10 are an integral part of the transactions contemplated by this Agreement and that, without these agreements, the other party would not enter into this Agreement. Each party further agrees that no other party hereto or any other Person shall be required to obtain, furnish or post any bond or similar instrument in connection with or as a condition to obtaining any remedy referred to in this Section 9.10, and each party hereto irrevocably waives any right it may have to require the obtaining, furnishing or posting of any such bond or similar instrument.

          9.11 Submission to Jurisdiction. Each of the parties irrevocably agrees that any legal action or proceeding arising out of or relating to this Agreement brought by any party or its Affiliates against any other party or its Affiliates shall be brought and determined in the Court of Chancery of the State of Delaware, provided that if jurisdiction is not then available in the Court of Chancery of the State of Delaware, then any such legal action or proceeding may be brought in any federal court located in the State of Delaware. Each of the parties hereby irrevocably submits to the jurisdiction of the aforesaid courts for itself and with respect to its property, generally and unconditionally, with regard to any such action or proceeding arising out of or relating to this Agreement and the transactions contemplated hereby. Each of the parties agrees not to commence any action, suit or

proceeding relating thereto except in the courts described above in Delaware, other than actions in any court of competent jurisdiction to enforce any judgment, decree or award rendered by any such court in Delaware as described herein. Each of the parties further agrees that notice as provided herein shall constitute sufficient service of process and the parties further waive any argument that such service is insufficient. Each of the parties hereby irrevocably and unconditionally waives, and agrees not to assert, by way of motion or as a defense, counterclaim or otherwise, in any action or proceeding arising out of or relating to this Agreement or the transactions contemplated hereby, (a) any claim that it is not personally subject to the jurisdiction of the courts in Delaware as described herein for any reason, (b) that it or its property is exempt or immune from jurisdiction of any such court or from any legal process commenced in such courts (whether through service of notice, attachment prior to judgment, attachment in aid of execution of judgment, execution of judgment or otherwise) and (c) that (i) the suit, action or proceeding in any such court is brought in an inconvenient forum, (ii) the venue of such suit, action or proceeding is improper or (iii) this Agreement, or the subject matter hereof, may not be enforced in or by such courts.

          9.12 Waiver of Jury Trial. EACH OF THE PARTIES TO THIS AGREEMENT HEREBY IRREVOCABLY WAIVES ALL RIGHT TO A TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY.

          9.13 No Presumption Against Drafting Party. Each of Allied World, Merger Sub and Transatlantic acknowledges that each party to this Agreement has been represented by counsel in connection with this Agreement and the transactions contemplated by this Agreement. Accordingly, any rule of law or any legal decision that would require interpretation of any claimed ambiguities in this Agreement against the drafting party has no application and is expressly waived.

          9.14 Publicity. Except (a) with respect to any Adverse Recommendation Change made in accordance with the terms of this Agreement and (b) with respect to disclosures that are consistent with prior disclosures made in compliance with this Section 9.14 or any communications plan or strategy previously agreed on by the parties, Allied World and Transatlantic shall consult with each other before issuing, and give each other the opportunity to review and comment upon, any press release or other public statements with respect to the transactions contemplated by this Agreement, including the Merger, and shall not issue any such press release or make any such public statement prior to such consultation, except as such party may reasonably conclude may be required by applicable Law, court process or by obligations pursuant to any listing agreement with any national securities exchange or national securities quotation system. The parties agree that all formal employee communication programs or announcements with respect to the transactions contemplated by this Agreement shall be in forms mutually agreed to by the parties (such agreement not to be unreasonably withheld, conditioned or delayed); provided, however, that no further mutual agreement shall be required with respect to any such programs or announcements that are consistent with prior programs or announcements made in compliance with this Section 9.14. The parties agree that the initial press release to be

issued with respect to the transactions contemplated by this Agreement shall be in the form heretofore agreed to by the parties.

          IN WITNESS WHEREOF, Allied World, Transatlantic and Merger Sub have caused this Agreement to be executed by their respective officers thereunto duly authorized as of the date first above written.

		ALLIED WORLD ASSURANCE COMPANY HOLDINGS, AG
		By:		/s/ Scott A. Carmilani
		Name:		Scott A. Carmilani
		Title:		President and Chief Executive Officer
		By:		/s/ Wesley D. Dupont
		Name:		Wesley D. Dupont
		Title:		Executive Vice President, General Counsel
				and Corporate Secretary
		GO SUB, LLC
		By: Ocean Holdings (U.S.) Inc., its Sole and Managing Member
		By:		/s/ Wesley D. Dupont
		Name:		Wesley D. Dupont
		Title:		Secretary
		TRANSATLANTIC HOLDINGS, INC.
		By:		/s/ Gary A. Schwartz
		Name:		Gary A. Schwartz
		Title:		Senior Vice President and General Counsel

ANNEX A

DEFINED TERMS

Defined Term		Section Number
Acquisition Proposal			5.5	(b)
Adverse Recommendation Change			5.5	(g)
Affiliate			9.3
Agreement		Preamble
Allied World		Preamble
Allied World Acquisition Agreement			5.5	(a)
Allied World Acquisition Proposal			5.5	(a)
Allied World Agents			3.31	(e)
Allied World Articles			3.1	(a)(ii)
Allied World Articles Amendment			1.5	(b)
Allied World Articles Amendment Stockholder Approval			3.3	(a)
Allied World Benefit Plan			3.16	(a)
Allied World Board			3.2	(a)(i)
Allied World Board Election Stockholder Approval			9.3
Allied World Board Recommendation			3.3	(a)
Allied World Bylaws			3.1	(a)(ii)
Allied World Capital Stock			9.3
Allied World Disclosure Schedule		Article III
Allied World Equity Award Shares			3.2	(a)(i)
Allied World ERISA Affiliate			3.16	(d)
Allied World Insurance Approvals			3.4
Allied World Leased Real Properties			3.13
Allied World Material Adverse Effect			9.3
Allied World Material Contract			3.20	(a)
Allied World Measurement Shares			3.2	(a)(i)
Allied World Outstanding Shares			3.2	(a)(i)
Allied World P/C Subsidiary			3.24
Allied World Permits			9.3
Allied World Real Property Leases			3.13
Allied World Reinsurance Contracts			3.27	(a)
Allied World Requisite Stockholder Vote			3.3	(a)
Allied World Risk-Based Capital Reports			3.30
Allied World RSU			9.3
Allied World SEC Documents			3.6	(a)
Allied World Secured Credit Facility			9.3
Allied World Share Issuance Stockholder Approval			3.3	(a)
Allied World Shares			2.1	(a)(iii)
Allied World Statutory Statements			3.25	(a)
Allied World Stock Option			9.3
Allied World Stock Plans			9.3
Allied World Stock-Based Award			9.3

Defined Term		Section Number
Allied World Stockholders Meeting			3.3	(a)
Allied World Subsidiary			3.2	(c)
Allied World Unsecured Credit Facility			9.3
Alternate Termination Fee			6.6	(c)
Antitrust Law			9.3
Bankruptcy and Equity Exception			3.3	(b)
Book-Entry Shares			2.2	(a)
Business Day			9.3
Certificate of Merger			1.3
Certificates			2.2	(a)
Closing			1.2
Closing Date			1.2
Code			2.3	(a)(i)
Commercial Register Ruling			6.13
Competing Transaction			5.5	(c)
Confidentiality Agreement			6.2
Contract			9.3
Converted Transatlantic Stock-Based Award			2.3	(a)(ii)
DB			3.14
Delaware Law			1.1
Effective Time			1.3
End Date			8.1	(e)
Environmental Law			9.3
Equity Equivalents			9.3
ERISA			3.16	(a)
Exchange Act			9.3
Exchange Agent			2.2	(a)
Exchange Fund			2.2	(a)
Exchange Ratio			2.1	(a)(iii)
Expense Reimbursement			6.6	(b)
FCPA			3.6	(e)
Forfeitures and Cashless Settlement			9.3
Form S-4			3.8
GAAP			9.3
Governmental Entity			9.3
Grant Date			3.2	(a)(iii)
HSR Act			3.4
Indemnified Party			6.5	(a)
Independent Director			9.3
Independent Allied World Director			9.3
Independent Transatlantic Director			9.3
Injunction			9.3
Insurance Contracts			3.31	(a)
Insurance Law			9.3
Insurance Regulators			9.3
Intellectual Property			9.3

Defined Term		Section Number
IRS			3.16	(a)
Joint Proxy Statement/Prospectus			6.1	(a)
knowledge of Allied World			9.3
knowledge of Transatlantic			9.3
Law			9.3
Liens			3.1	(b)(ii)
Maximum Premium			6.5	(b)
Measurement Date			3.2	(a)(i)
Merger			1.1
Merger Consideration			2.1	(a)(iii)
Merger Sub		Preamble
Merger Sub Common Stock			2.1	(a)(i)
Merger Sub Member Approval			3.3	(a)
Moelis			4.14
Moelis Fairness Opinion			4.14
Newco Holdings			9.9	(b)
Non-Target Party			5.5	(c)
NYSE			2.2	(e)
Order			9.3
Organizational Documents			9.3
Participation Certificate			3.2	(a)(ii)
Partner Agent			9.3
Partner Agent Agreement			9.3
PBGC			3.16	(d)
Permitted Liens			9.3
Person			9.3
Prior Allied World Parent		Article III
Reconstituted Allied World Board			6.9	(a)
Reconstituted Allied World Board Written Consent			6.9	(b)
Redomestication			3.33
Representatives			9.3
Requisite Lender Consents			6.4	(a)
Requisite Regulatory Approvals			7.1	(d)
Restated Articles			1.5	(b)
SAP			9.3
SEC		Article III
Second Request			6.3	(c)(v)
Securities Act			9.3
Share Issuance			9.3
SOX			3.6	(d)
Stock Options			9.3
Stock-Based Awards			9.3
Subsidiaries			3.2	(c)
Subsidiary			3.2	(c)
Substantial Compliance			9.3
Superior Proposal			5.5	(f)

Defined Term		Section Number
Supplemental Indenture			6.4	(b)
Surviving Corporation			1.1
Target Board			5.5	(e)
Target Party			5.5	(c)
Tax			9.3
Tax Return			9.3
Taxing Authority			9.3
Termination Fee			6.6	(e)
Transatlantic		Preamble
Transatlantic Acquisition Agreement			5.5	(b)
Transatlantic Acquisition Proposal			5.5	(b)
Transatlantic Agents			4.31	(b)
Transatlantic Benefit Plan			4.16	(a)
Transatlantic Board			2.3	(a)
Transatlantic Board Recommendation			4.3	(a)
Transatlantic Bylaws			4.1	(b)
Transatlantic Charter			4.1	(b)
Transatlantic Common Stock			2.1	(a)(ii)
Transatlantic Disclosure Schedule		Article IV
Transatlantic ERISA Affiliate			4.16	(d)
Transatlantic Indenture			6.4	(b)
Transatlantic Insurance Approvals			4.4
Transatlantic Insurance Intermediaries			4.32
Transatlantic Leased Real Properties			4.13
Transatlantic Material Adverse Effect			9.3
Transatlantic Material Contract			4.20	(a)
Transatlantic P/C Subsidiary			4.24
Transatlantic Permits			9.3
Transatlantic Preferred Stock			4.2	(a)(i)
Transatlantic Real Property Leases			4.13
Transatlantic Reinsurance Contracts			4.27	(a)
Transatlantic Requisite Stockholder Vote			4.3	(a)
Transatlantic Restricted Shares			9.3
Transatlantic Risk-Based Capital Reports			4.30
Transatlantic Rollover Option			2.3	(a)(i)
Transatlantic RSU			9.3
Transatlantic SAR			9.3
Transatlantic SEC Documents			4.6	(a)
Transatlantic Statutory Statements			4.25	(a)
Transatlantic Stock Option			9.3
Transatlantic Stock Plans			9.3
Transatlantic Stock-Based Award			9.3
Transatlantic Stockholders Meeting			4.3	(a)
Transatlantic Subsidiary			3.2	(c)