2004 Omnibus Incentive Plan Southwest Bancorporation of Texas, Inc. May 5, 2004

1.1    Establishment. Southwest Bancorporation of Texas, Inc., a Texas corporation (hereinafter referred to as the “Company”), establishes an incentive compensation plan to be known as the 2004 Omnibus Incentive Plan (hereinafter referred to as the “Plan”), as set forth in this document.

The Plan permits the grant of Cash-Based Awards, Nonqualified Stock Options, Incentive Stock Options, Stock Appreciation Rights, Restricted Stock, Restricted Stock Units, Performance Shares, Performance Units, Covered Employee Annual Incentive Awards, and Other Stock-Based Awards.

The Plan shall become effective upon shareholder approval (the “Effective Date”) and shall remain in effect as provided in Section 1.3 hereof.

1.2    Purpose of the Plan. The purpose of the Plan is to provide a means whereby Employees, Directors, and Third Party Service Providers of the Company develop a sense of proprietorship and personal involvement in the development and financial success of the Company, and to encourage them to devote their best efforts to the business of the Company, thereby advancing the interests of the Company and its shareholders. A further purpose of the Plan is to provide a means through which the Company may attract able persons to become Employees or serve as Directors or Third Party Service Providers of the Company and to provide a means whereby those individuals upon whom the responsibilities of the successful administration and management of the Company are of importance, can acquire and maintain stock ownership, thereby strengthening their concern for the welfare of the Company.

1.3    Duration of the Plan. Unless sooner terminated as provided herein, the Plan shall terminate ten years from the Effective Date. After the Plan is terminated, no Awards may be granted but Awards previously granted shall remain outstanding in accordance with their applicable terms and conditions and the Plan’s terms and conditions. Notwithstanding the foregoing, no Incentive Stock Options may be granted more than ten years after the earlier of (a) adoption of the Plan by the Board, and (b) the Effective Date.

Whenever used in the Plan, the following terms shall have the meanings set forth below, and when the meaning is intended, the initial letter of the word shall be capitalized.

Shares, Performance Units, Covered Employee Annual Incentive Awards, or Other Stock-Based Awards, in each case subject to the terms of this Plan.

(a)    The acquisition by any individual, entity or group (within the meaning of Section 13(d)(3) or 14(d)(2) of the Exchange Act) (a “ Covered Person”) of Beneficial Ownership (within the meaning of rule 13d-3 promulgated under the Exchange Act) of thirty percent (30%) or more of either (i) the then outstanding Shares of the common stock of the Company (the “Outstanding Company Common Stock”), or (ii) the combined voting power of the then outstanding voting securities of the Company entitled to vote generally in the election of directors (the “Outstanding Company Voting Securities”); provided, however, that for purposes of this subsection (a) of this Section 2.8, the following acquisitions shall not constitute a Change in Control of the Company: (i) any acquisition directly from the Company, (ii) any acquisition by the Company, (iii) any acquisition by any employee benefit plan (or related trust) sponsored or maintained by the Company or any entity controlled by the Company, or (iv) any acquisition by any corporation pursuant to a transaction which complies with clauses (i), (ii) and (iii) of subsection (c) of this Section 2; or

(b)    Individuals who, as of the Effective Date, constitute the Board of Directors (the “Incumbent Board”) cease for any reason to constitute at least a majority of the Board of Directors; provided, however, that any individual becoming a Director subsequent to the Effective Date whose election, or nomination for election by the Company’s shareholders, was approved by a vote of at least two-thirds of the Directors then comprising the Incumbent Board shall be considered as though such individual were a member of the Incumbent Board, but excluding, for this purpose, any such individual whose initial assumption of office occurs as a result of an actual or threatened election contest with respect to the election or removal of Directors or other actual or threatened solicitation of proxies or consents by or on behalf of a Covered Person other than the Board; or

(c)    Consummation of (xx) a reorganization, merger or consolidation or sale of the Company or any subsidiary of the Company, or (yy) a disposition of all or substantially all of the assets of the Company (a “Business Combination”), in each case, unless, following such Business Combination, (i) all or substantially all of the individuals and entities who were the Beneficial Owners, respectively, of the Outstanding Company Common Stock and Outstanding Company Voting Securities immediately prior to such Business Combination beneficially own, directly or indirectly, more than fifty percent (50%) of, respectively, the then outstanding Shares of common stock and the combined voting power of the then outstanding voting securities entitled to vote generally in the election of Directors, as the case may be, of the corporation resulting from such Business Combination (including, without limitation, a corporation which as a result of such transaction owns the Company or all or substantially all of the Company’s assets either directly or through one or more subsidiaries) in substantially the same proportions as their ownership

immediately prior to such Business Combination of the Outstanding Company Common Stock and Outstanding Company Voting Securities, as the case may be, (ii) no Covered Person (excluding any employee benefit plan (or related trust) of the Company or such corporation resulting from such Business Combination) beneficially owns, directly or indirectly, thirty percent (30%) or more of, respectively, the then outstanding Shares of common stock of the corporation resulting from such Business Combination or the combined voting power of the then outstanding voting securities of such corporation, except to the extent that such ownership existed prior to the Business Combination, and (iii) at least a majority of the members of the Board of Directors of the corporation resulting from such Business Combination were members of the Incumbent Board at the time of the execution of the initial agreement, or of the action of the Board of Directors, providing for such Business Combination.

as it deems appropriate. Such definition(s) of FMV shall be specified in each Award Agreement and may differ depending on whether FMV is in reference to the grant, exercise, vesting, settlement, or payout of an Award.

and sale of the Company’s securities in a capital raising transaction, and (b) do not directly or indirectly promote or maintain a market for the Company’s securities.

3.1    General. The Committee shall be responsible for administering the Plan, subject to this Article 3 and the other provisions of the Plan. The Committee may employ attorneys, consultants, accountants, agents, and other persons, any of whom may be an Employee, and the Committee, the Company, and its officers and Directors shall be entitled to rely upon the advice, opinions, or valuations of any such persons. All actions taken and all interpretations and determinations made by the Committee shall be final and binding upon the Participants, the Company, and all other interested persons.

3.2    Authority of the Committee. The Committee shall have full and exclusive discretionary power to interpret the terms and the intent of the Plan and any Award Agreement or other agreement or document ancillary to or in connection with the Plan, to determine eligibility for Awards and to adopt such rules, regulations, forms, instruments, and guidelines for administering the Plan as the Committee may deem necessary or proper. Such authority shall include, but not be limited to, selecting Award recipients, establishing all Award terms and conditions, including the terms and conditions set forth in Award Agreements, and, subject to Article 19, adopting modifications and amendments to the Plan or any Award Agreement, including without limitation, any that are necessary to comply with the laws of the countries and other jurisdictions in which the Company, its Affiliates, and/or its Subsidiaries operate.

3.3    Delegation. The Committee may delegate to one or more of its members or to one or more officers of the Company, and/or its Subsidiaries and Affiliates or to one or more agents or advisors such administrative duties or powers as it may deem advisable, and the Committee or any person to whom it has delegated duties or powers as aforesaid may employ one or more persons to render advice with respect to any responsibility the Committee or such person may have under the Plan. The Committee may, by resolution, authorize one or more officers of the Company to do one or both of the following on the same basis as can the Committee: (a) designate Employees to be recipients of Awards; (b) designate Third Party Service Providers to be recipients of Awards; and (c) determine the size of any such Awards; provided, however, (i) the Committee shall not delegate such responsibilities to any such officer for Awards granted to an Employee that is considered an Insider; (ii) the resolution providing such authorization sets forth the total number of Awards such officer(s) may grant; and (iii) the officer(s) shall report periodically to the Committee regarding the nature and scope of the Awards granted pursuant to the authority delegated.

4.1    Number of Shares Available for Awards.

(a)    Subject to adjustment as provided in Section 4.4 herein, the maximum number of Shares available for issuance to Participants under the Plan (the “Share Authorization”) is 2,250,000 Shares. This Plan shall serve as the successor to the Prior Plans and no further grants shall be made under the Prior Plans from and after the Effective Date of this Plan. All outstanding Awards under the Prior Plans shall continue to be governed solely by the terms and conditions of the instrument evidencing such grant or issuance. Any Shares of common stock reserved for issuance under the Prior Plans in excess of the number of Shares as to which Awards have been awarded thereunder shall no longer be available for grant after the Effective Date.

(b)    Of the Shares reserved for issuance under Section 4.1(a) of the Plan, no more than thirty three percent (33%) of the reserved Shares may be issued pursuant to Full Value Awards.

(c)    Subject to the limit set forth in Section 4.1(a) on the number of Shares that may be issued in the aggregate under the Plan, the maximum number of Shares that may be issued pursuant to ISOs and NQSOs shall be:

(i)        Two million two hundred and fifty thousand (2,250,000) Shares that may be issued pursuant to Awards in the form of ISOs; and

(ii)        Two million two hundred and fifty thousand (2,250,000) Shares that may be issued pursuant to Awards in the form of NQSOs.

4.2    Share Usage. Shares covered by an Award shall only be counted as used to the extent they are actually issued. Any Shares related to Awards which terminate by expiration, forfeiture, cancellation, or otherwise without the issuance of such Shares, are settled in cash in lieu of Shares, or are exchanged with the Committee’s permission, prior to the issuance of Shares, for Awards not involving Shares, shall be available again for grant under the Plan. Moreover, if the Option Price of any Option granted under the Plan or the tax withholding requirements with respect to any Award granted under the Plan are satisfied by tendering Shares to the Company (by either actual delivery or by attestation), or if an SAR is exercised, only the number of Shares issued, net of the Shares tendered, if any, will be deemed delivered for purposes of determining the maximum number of Shares available for delivery under the Plan. The maximum number of Shares available for issuance under the Plan shall not be reduced to reflect any dividends or dividend equivalents that are reinvested into additional Shares or credited as additional Restricted Stock, Restricted Stock Units, Performance Shares, or Stock-Based Awards. The Shares available for issuance under the Plan may be authorized and unissued Shares or treasury Shares.

4.3    Annual Award Limits. Unless and until the Committee determines that an Award to a Covered Employee shall not be designed to qualify as Performance-Based Compensation, the following limits (each an “Annual Award Limit” and, collectively, “Annual Award Limits”) shall apply to grants of such Awards under the Plan:

(a)    Options: The maximum aggregate number of Shares subject to Options granted in any one Plan Year to any one Participant shall be two hundred fifty thousand (250,000) Shares plus the amount of the Participant’s unused applicable Annual Award Limit for Options as of the close of the previous Plan Year.

(b)    SARs: The maximum number of Shares subject to Stock Appreciation Rights granted in any one Plan Year to any one Participant shall be two hundred fifty thousand (250,000) Shares plus the amount of the Participant’s unused applicable Annual Award Limit for SARs as of the close of the previous Plan Year.

4.4    Adjustments in Authorized Shares. In the event of any corporate event or transaction (including, but not limited to, a change in the Shares of the Company or the capitalization of the Company) such as a merger, consolidation, reorganization, recapitalization, separation, stock dividend, stock split, reverse stock split, split up, spin-off, or other distribution of stock or property of the Company, combination of Shares, exchange of Shares, dividend in kind, or other like change in capital structure or distribution (other than normal cash dividends) to shareholders of the Company, or any similar corporate event or transaction, the Committee, in its sole discretion, in order to prevent dilution or enlargement of Participants’ rights under the Plan, shall substitute or adjust, as applicable, the number and kind of Shares that may be issued under the Plan or under particular forms of Awards, the number and kind of Shares subject to outstanding Awards, the Option Price or Grant Price applicable to outstanding Awards, the Annual Award Limits, and other value determinations applicable to outstanding Awards.

The Committee, in its sole discretion, may also make appropriate adjustments in the terms of any Awards under the Plan to reflect or related to such changes or distributions and to modify any other terms of outstanding Awards, including modifications of performance goals and changes in the length of Performance Periods. The determination of the Committee as to the foregoing adjustments, if any, shall be conclusive and binding on Participants under the Plan.

Subject to the provisions of Article 19, without affecting the number of Shares reserved or available hereunder, the Committee may authorize the issuance or assumption of benefits under this Plan in connection with any merger, consolidation, acquisition of property or stock, or reorganization upon such terms and conditions as it may deem appropriate, subject to compliance with the ISO rules under Section 422 of the Code, where applicable.

5.1    Eligibility. Individuals eligible to participate in this Plan include all Employees, Directors, and Third Party Service Providers.

5.2    Actual Participation. Subject to the provisions of the Plan, the Committee may, from time to time, select from all eligible individuals, those to whom Awards shall be granted and shall determine, in its sole discretion, the nature of, any and all terms permissible by law, and the amount of each Award.

6.1    Grant of Options. Subject to the terms and provisions of the Plan, Options may be granted to Participants in such number, and upon such terms, and at any time and from time to time as shall be determined by the Committee, in its sole discretion; provided that ISOs may be granted only to eligible Employees of the Company or of any parent or subsidiary corporation (as permitted by Section 422 of the Code and the regulations thereunder).

6.2    Award Agreement. Each Option grant shall be evidenced by an Award Agreement that shall specify the Option Price, the maximum duration of the Option, the number of Shares to which the Option pertains, the conditions upon which an Option shall become vested and exercisable, and such other provisions as the Committee shall determine which are not inconsistent with the terms of the Plan. The Award Agreement also shall specify whether the Option is intended to be an ISO or a NQSO.

6.3    Option Price. The Option Price for each grant of an Option under this Plan shall be as determined by the Committee and shall be specified in the Award Agreement. The Option Price shall be based on either one hundred

percent (100%) of the FMV of the Shares on the date of grant, set at a premium to the FMV of the Shares on the date of grant, or indexed to the FMV of the Shares on the date of grant, with the index determined by the Committee, in its discretion; provided, however, if the Option is an ISO the Option Price must be at least equal to one hundred percent (100%) of the FMV of the Shares on the date of grant, and, in the case of a Ten Percent Stockholder, the Option Price must not be less than one hundred ten percent (110%) of the FMV of the Shares on the date of grant.

6.4    Duration of Options. Each Option granted to a Participant shall expire at such time as the Committee shall determine at the time of grant; provided, however, no Option shall be exercisable later than the tenth (10^th) anniversary of the date of its grant, and, in the case of a Ten Percent Stockholder, no ISO shall be exercisable later than the fifth (5^th) anniversary of the date of its grant. Notwithstanding the foregoing, for Options granted to Participants outside the United States, the Committee has the authority to grant Options that have a term greater than ten (10) years.

6.5    Exercise of Options. Options granted under this Article 6 shall be exercisable at such times and be subject to such restrictions and conditions as the Committee shall in each instance approve, which terms and restrictions need not be the same for each grant or for each Participant.

6.6    Payment. Options granted under this Article 6 shall be exercised by the delivery of a notice of exercise to the Company or an agent designated by the Company in a form specified or accepted by the Committee, or by complying with any alternative procedures which may be authorized by the Committee, setting forth the number of Shares with respect to which the Option is to be exercised, accompanied by full payment for the Shares.

A condition of the issuance of the Shares as to which an Option shall be exercised shall be the payment of the Option Price. The Option Price of any Option shall be payable to the Company in full either: (a) in cash or its equivalent; (b) by tendering (either by actual delivery or attestation) previously acquired Shares having an aggregate Fair Market Value at the time of exercise equal to the Option Price (provided that except as otherwise determined by the Committee, the Shares that are tendered must have been held by the Participant for at least six (6) months prior to their tender to satisfy the Option Price or have been purchased on the open market); (c) by a combination of (a) and (b); or (d) any other method approved or accepted by the Committee in its sole discretion, including, without limitation, if the Committee so determines, a cashless (broker-assisted) exercise.

Subject to any governing rules or regulations, as soon as practicable after receipt of written notification of exercise and full payment (including satisfaction of any applicable tax withholding), the Company shall deliver to the Participant evidence of book entry Shares, or upon the Participant’s request, Share certificates in an appropriate amount based upon the number of Shares purchased under the Option(s).

Unless otherwise determined by the Committee, all payments under all of the methods indicated above shall be paid in United States dollars.

6.7    Restrictions on Share Transferability. The Committee may impose such restrictions on any Shares acquired pursuant to the exercise of an Option granted under this Article 6 as it may deem advisable, including, without limitation, minimum holding period requirements, restrictions under applicable federal securities laws, under the requirements of any stock exchange or market upon which such Shares are then listed and/or traded, or under any blue sky or state securities laws applicable to such Shares.

6.8    Termination of Employment. Each Participant’s Award Agreement shall set forth the extent to which the Participant shall have the right to exercise the Option following termination of the Participant’s employment or provision of services to the Company, its Affiliates, its Subsidiaries, as the case may be. Such provisions shall be determined in the sole discretion of the Committee, shall be included in the Award Agreement entered into with each Participant, need not be uniform among all Options issued pursuant to this Article 6, and may reflect distinctions based on the reasons for termination.

(a)    Incentive Stock Options. No ISO granted under the Plan may be sold, transferred, pledged, assigned, or otherwise alienated or hypothecated, other than by will or by the laws of descent and distribution. Further, all ISOs granted to a Participant under this Article 6 shall be exercisable during his or her lifetime only by such Participant.

(b)    Nonqualified Stock Options. Except as otherwise provided in a Participant’s Award Agreement or otherwise determined at any time by the Committee, no NQSO granted under this Article 6 may be sold, transferred, pledged, assigned, or otherwise alienated or hypothecated, other than by will or by the laws of descent and distribution; provided that the Board or Committee may permit further transferability, on a general or a specific basis, and may impose conditions and limitations on any permitted transferability. Further, except as otherwise provided in a Participant’s Award Agreement or otherwise determined at any time by the Committee, or unless the Board or Committee decides to permit further transferability, all NQSOs granted to a Participant under this Article 6 shall be exercisable during his or her lifetime only by such Participant. With respect to those NQSOs, if any, that are permitted to be transferred to another person, references in the Plan to exercise or payment of the Option Price by the Participant shall be deemed to include, as determined by the Committee, the Participant’s permitted transferee.

6.10    Notification of Disqualifying Disposition. If any Participant shall make any disposition of Shares issued pursuant to the exercise of an ISO under the circumstances described in Section 421(b) of the Code (relating to certain disqualifying dispositions), such Participant shall notify the Company of such disposition within ten (10) days thereof.

6.11.    Substituting SARs. Only in the event the Company is not accounting for equity compensation under APB Opinion 25, the Committee shall have the ability to substitute, without receiving Participant permission, SARs paid only in Stock (or SARs paid in Stock or cash at the Committee’s discretion) for outstanding Options; provided, the terms of the substituted Stock SARs are the same as the terms for the Options and the aggregate difference between the Fair Market Value of the underlying Shares and the Grant Price of the SARs is equivalent to the aggregate difference between the Fair Market Value of the underlying Shares and the Option Price of the Options. If, in the opinion of the Company’s auditors, this provision creates adverse accounting consequences for the Company, it shall be considered null and void.

7.1    Grant of SARs. Subject to the terms and conditions of the Plan, SARs may be granted to Participants at any time and from time to time as shall be determined by the Committee. The Committee may grant Freestanding SARs, Tandem SARs, or any combination of these forms of SARs.

Subject to the terms and conditions of the Plan, the Committee shall have complete discretion in determining the number of SARs granted to each Participant and, consistent with the provisions of the Plan, in determining the terms and conditions pertaining to such SARs.

The Grant Price for each grant of a Freestanding SAR shall be determined by the Committee and shall be specified in the Award Agreement. The Grant Price shall be based on either one hundred percent (100%) of the FMV of the Shares on the date of grant, set at a premium to the FMV of the Shares on the date of grant, indexed to the FMV of the Shares on the date of grant, with the index determined by the Committee, in its discretion. The Grant Price of Tandem SARs shall be equal to the Option Price of the related Option.

7.2    SAR Agreement. Each SAR Award shall be evidenced by an Award Agreement that shall specify the Grant Price, the term of the SAR, and such other provisions as the Committee shall determine.

7.3    Term of SAR. The term of an SAR granted under the Plan shall be determined by the Committee, in its sole discretion, and except as determined otherwise by the Committee and specified in the SAR Award Agreement, no

SAR shall be exercisable later than the tenth (10^th) anniversary date of its grant. Notwithstanding the foregoing, for SARs granted to Participants outside the United States, the Committee has the authority to grant SARs that have a term greater than ten (10) years.

7.4    Exercise of Freestanding SARs. Freestanding SARs may be exercised upon whatever terms and conditions the Committee, in its sole discretion, imposes.

7.5.    Exercise of Tandem SARs. Tandem SARs may be exercised for all or part of the Shares subject to the related Option upon the surrender of the right to exercise the equivalent portion of the related Option. A Tandem SAR may be exercised only with respect to the Shares for which its related Option is then exercisable.

Notwithstanding any other provision of this Plan to the contrary, with respect to a Tandem SAR granted in connection with an ISO: (a) the Tandem SAR will expire no later than the expiration of the underlying ISO; (b) the value of the payout with respect to the Tandem SAR may be for no more than one hundred percent (100%) of the excess of the Fair Market Value of the Shares subject to the underlying ISO at the time the Tandem SAR is exercised over the Option Price of the underlying ISO; and (c) the Tandem SAR may be exercised only when the Fair Market Value of the Shares subject to the ISO exceeds the Option Price of the ISO.

7.6    Payment of SAR Amount. Upon the exercise of an SAR, a Participant shall be entitled to receive payment from the Company in an amount determined by multiplying:

(a)    The excess of the Fair Market Value of a Share on the date of exercise over the Grant Price; by

(b)    The number of Shares with respect to which the SAR is exercised.

At the discretion of the Committee, the payment upon SAR exercise may be in cash, Shares, or any combination thereof, or in any other manner approved by the Committee in its sole discretion. The Committee’s determination regarding the form of SAR payout shall be set forth in the Award Agreement pertaining to the grant of the SAR.

7.7    Termination of Employment. Each Award Agreement shall set forth the extent to which the Participant shall have the right to exercise the SAR following termination of the Participant’s employment with or provision of services to the Company, its Affiliates, and/or its Subsidiaries, as the case may be. Such provisions shall be determined in the sole discretion of the Committee, shall be included in the Award Agreement entered into with Participants, need not be uniform among all SARs issued pursuant to the Plan, and may reflect distinctions based on the reasons for termination.

7.8    Nontransferability of SARs. Except as otherwise provided in a Participant’s Award Agreement or otherwise determined at any time by the Committee, no SAR granted under the Plan may be sold, transferred, pledged, assigned, or otherwise alienated or hypothecated, other than by will or by the laws of descent and distribution. Further, except as otherwise provided in a Participant’s Award Agreement or otherwise determined at any time by the Committee, all SARs granted to a Participant under the Plan shall be exercisable during his or her lifetime only by such Participant. With respect to those SARs, if any, that are permitted to be transferred to another person, references in the Plan to exercise of the SAR by the Participant or payment of any amount to the Participant shall be deemed to include, as determined by the Committee, the Participant’s permitted transferee.

7.9    Other Restrictions. The Committee shall impose such other conditions and/or restrictions on any Shares received upon exercise of a SAR granted pursuant to the Plan as it may deem advisable or desirable. These restrictions may include, but shall not be limited to, a requirement that the Participant hold the Shares received upon exercise of a SAR for a specified period of time.

8.1    Grant of Restricted Stock or Restricted Stock Units. Subject to the terms and provisions of the Plan, the Committee, at any time and from time to time, may grant Shares of Restricted Stock and/or Restricted Stock Units to Participants in such amounts as the Committee shall determine. Restricted Stock Units shall be similar to Restricted Stock except that no Shares are actually awarded to the Participant on the date of grant.

8.2    Restricted Stock or Restricted Stock Unit Agreement. Each Restricted Stock and/or Restricted Stock Unit grant shall be evidenced by an Award Agreement that shall specify the Period(s) of Restriction, the number of Shares of Restricted Stock or the number of Restricted Stock Units granted, and such other provisions as the Committee shall determine.

8.3    Transferability. Except as provided in this Plan or an Award Agreement, the Shares of Restricted Stock and/or Restricted Stock Units granted herein may not be sold, transferred, pledged, assigned, or otherwise alienated or hypothecated until the end of the applicable Period of Restriction established by the Committee and specified in the Award Agreement (and in the case of Restricted Stock Units until the date of delivery or other payment), or upon earlier satisfaction of any other conditions, as specified by the Committee, in its sole discretion, and set forth in the Award Agreement or otherwise at any time by the Committee. All rights with respect to the Restricted Stock and/or Restricted Stock Units granted to a Participant under the Plan shall be available during his or her lifetime only to such Participant, except as otherwise provided in an Award Agreement or at any time by the Committee.

8.4    Other Restrictions. The Committee shall impose such other conditions and/or restrictions on any Shares of Restricted Stock or Restricted Stock Units granted pursuant to the Plan as it may deem advisable including, without limitation, a requirement that Participants pay a stipulated purchase price for each Share of Restricted Stock or each Restricted Stock Unit, restrictions based upon the achievement of specific performance goals, time-based restrictions on vesting following the attainment of the performance goals, time-based restrictions, and/or restrictions under applicable laws or under the requirements of any stock exchange or market upon which such Shares are listed or traded, or holding requirements or sale restrictions placed on the Shares by the Company upon vesting of such Restricted Stock or Restricted Stock Units.

To the extent deemed appropriate by the Committee, the Company may retain the certificates representing Shares of Restricted Stock in the Company’s possession until such time as all conditions and/or restrictions applicable to such Shares have been satisfied or lapse.

Except as otherwise provided in this Article 8, Shares of Restricted Stock covered by each Restricted Stock Award shall become freely transferable by the Participant after all conditions and restrictions applicable to such Shares have been satisfied or lapse (including satisfaction of any applicable tax withholding obligations), and subject to Article 16, at the close of the Restriction Period, or as soon as practicable thereafter, Restricted Stock Units shall be paid in cash, Shares, or a combination of cash and Shares as the Committee, in its sole discretion shall determine.

8.5    Certificate Legend. In addition to any legends placed on certificates pursuant to Section 8.4, each certificate representing Shares of Restricted Stock granted pursuant to the Plan may bear a legend such as the following or as otherwise determined by the Committee in its sole discretion:

The sale or transfer of Shares of stock represented by this certificate, whether voluntary, involuntary, or by operation of law, is subject to certain restrictions on transfer as set forth in the Southwest Bancorporation of Texas, Inc.’s 2004 Omnibus Incentive Plan, and in the associated Award Agreement. A copy of the Plan and such Award Agreement may be obtained from Southwest Bancorporation of Texas, Inc.

8.6    Voting Rights. Unless otherwise determined by the Committee and set forth in a Participant’s Award Agreement, to the extent permitted or required by law, as determined by the Committee, Participants holding Shares of Restricted Stock granted hereunder may be granted the right to exercise full voting rights with respect to those Shares

during the Period of Restriction. A Participant shall have no voting rights with respect to any Restricted Stock Units granted hereunder.

8.7    Termination of Employment. Each Award Agreement shall set forth the extent to which the Participant shall have the right to retain Restricted Stock and/or Restricted Stock Units following termination of the Participant’s employment with or provision of services to the Company, its Affiliates, and/or its Subsidiaries, as the case may be. Such provisions shall be determined in the sole discretion of the Committee, shall be included in the Award Agreement entered into with each Participant, need not be uniform among all Shares of Restricted Stock or Restricted Stock Units issued pursuant to the Plan, and may reflect distinctions based on the reasons for termination.

8.8    Section 83(b) Election. The Committee may provide in an Award Agreement that the Award of Restricted Stock is conditioned upon the Participant making or refraining from making an election with respect to the Award under Section 83(b) of the Code. If a Participant makes an election pursuant to Section 83(b) of the Code concerning a Restricted Stock Award, the Participant shall be required to file promptly a copy of such election with the Company.

9.1    Grant of Performance Units/Performance Shares. Subject to the terms and provisions of the Plan, the Committee, at any time and from time to time, may grant Performance Units and/or Performance Shares to Participants in such amounts and upon such terms as the Committee shall determine.

9.2    Value of Performance Units/Performance Shares. Each Performance Unit shall have an initial value that is established by the Committee at the time of grant. Each Performance Share shall have an initial value equal to the Fair Market Value of a Share on the date of grant. The Committee shall set performance goals in its discretion which, depending on the extent to which they are met, will determine the value and/or number of Performance Units/Performance Shares that will be paid out to the Participant.

9.3    Earning of Performance Units/Performance Shares. Subject to the terms of this Plan, after the applicable Performance Period has ended, the holder of Performance Units/Performance Shares shall be entitled to receive payout on the value and number of Performance Units/Performance Shares earned by the Participant over the Performance Period, to be determined as a function of the extent to which the corresponding performance goals have been achieved.

9.4    Form and Timing of Payment of Performance Units/Performance Shares. Payment of earned Performance Units/Performance Shares shall be as determined by the Committee and as evidenced in the Award Agreement. Subject to the terms of the Plan, the Committee, in its sole discretion, may pay earned Performance Units/Performance Shares in the form of cash or in Shares (or in a combination thereof) equal to the value of the earned Performance Units/Performance Shares at the close of the applicable Performance Period, or as soon as practicable after the end of the Performance Period. Any Shares may be granted subject to any restrictions deemed appropriate by the Committee. The determination of the Committee with respect to the form of payout of such Awards shall be set forth in the Award Agreement pertaining to the grant of the Award.

9.5    Termination of Employment. Each Award Agreement shall set forth the extent to which the Participant shall have the right to retain Performance Units and/or Performance Shares following termination of the Participant’s employment with or provision of services to the Company, its Affiliates, and/or its Subsidiaries, as the case may be. Such provisions shall be determined in the sole discretion of the Committee, shall be included in the Award Agreement entered into with each Participant, need not be uniform among all Awards of Performance Units or Performance Shares issued pursuant to the Plan, and may reflect distinctions based on the reasons for termination.

9.6    Nontransferability. Except as otherwise provided in a Participant’s Award Agreement or otherwise determined at any time by the Committee, Performance Units/Performance Shares may not be sold, transferred, pledged, assigned, or otherwise alienated or hypothecated, other than by will or by the laws of descent and distribution. Further,

except as otherwise provided in a Participant’s Award Agreement or otherwise determined at any time by the Committee, a Participant’s rights under the Plan shall be exercisable during his or her lifetime only by such Participant.

10.1    Grant of Cash-Based Awards. Subject to the terms and provisions of the Plan, the Committee, at any time and from time to time, may grant Cash-Based Awards to Participants in such amounts and upon such terms, including the achievement of specific performance goals, as the Committee may determine.

10.2    Other Stock-Based Awards. The Committee may grant other types of equity-based or equity-related Awards not otherwise described by the terms of this Plan (including the grant or offer for sale of unrestricted Shares) in such amounts and subject to such terms and conditions, as the Committee shall determine. Such Awards may involve the transfer of actual Shares to Participants, or payment in cash or otherwise of amounts based on the value of Shares and may include, without limitation, Awards designed to comply with or take advantage of the applicable local laws of jurisdictions other than the United States.

10.3    Value of Cash-Based and Other Stock-Based Awards. Each Cash-Based Award shall specify a payment amount or payment range as determined by the Committee. Each Other Stock-Based Award shall be expressed in terms of Shares or units based on Shares, as determined by the Committee. The Committee may establish performance goals in its discretion. If the Committee exercises its discretion to establish performance goals, the number and/or value of Cash-Based Awards or Other Stock-Based Awards that will be paid out to the Participant will depend on the extent to which the performance goals are met.

10.4    Payment of Cash-Based Awards and Other Stock-Based Awards. Payment, if any, with respect to a Cash-Based Award or an Other Stock-Based Award shall be made in accordance with the terms of the Award, in cash or Shares as the Committee determines.

10.5    Termination of Employment. The Committee shall determine the extent to which the Participant shall have the right to receive Cash-Based Awards and Other Stock-Based Awards following termination of the Participant’s employment with or provision of services to the Company, its Affiliates, and/or its Subsidiaries, as the case may be. Such provisions shall be determined in the sole discretion of the Committee, such provisions may be included in an agreement entered into with each Participant, but need not be uniform among all Awards of Cash-Based Awards and Other Stock-Based Awards issued pursuant to the Plan, and may reflect distinctions based on the reasons for termination.

10.6    Nontransferability. Except as otherwise determined by the Committee, neither Cash-Based Awards nor Other Stock-Based Awards may be sold, transferred, pledged, assigned, or otherwise alienated or hypothecated, other than by will or by the laws of descent and distribution. Further, except as otherwise provided by the Committee, a Participant’s rights under the Plan, if exercisable, shall be exercisable during his or her lifetime only by such Participant. With respect to those Cash-Based Awards or Other Stock-Based Awards, if any, that are permitted to be transferred to another person, references in the Plan to exercise or payment of such Awards by or to the Participant shall be deemed to include, as determined by the Committee, the Participant’s permitted transferee.

11.1    Performance Measures. Unless and until the Committee proposes for shareholder vote and the shareholders approve a change in the general Performance Measures set forth in this Article 11, the performance goals upon which the payment or vesting of an Award to a Covered Employee (other than a Covered Employee Annual Incentive Award awarded or credited pursuant to Article 12) that is intended to qualify as Performance-Based Compensation shall be limited to the following Performance Measures:

Any Performance Measure(s) may be used to measure the performance of the Company, Subsidiary, and/or Affiliate as a whole or any business unit of the Company, Subsidiary, and/or Affiliate or any combination thereof, as the Committee may deem appropriate, or any of the above Performance Measures as compared to the performance of a group of comparator companies, or published or special index that the Committee, in its sole discretion, deems appropriate, or the Company may select Performance Measure (j) above as compared to various stock market indices. The Committee also has the authority to provide for accelerated vesting of any Award based on the achievement of performance goals pursuant to the Performance Measures specified in this Article 11.

11.2    Evaluation of Performance. The Committee may provide in any such Award that any evaluation of performance may include or exclude any of the following events that occurs during a Performance Period: (a) asset write-downs, (b) litigation or claim judgments or settlements, (c) the effect of changes in tax laws, accounting principles, or other laws or provisions affecting reported results, (d) any reorganization and restructuring programs, (e) extraordinary nonrecurring items as described in Accounting Principles Board Opinion No. 30 and/or in management’s discussion and analysis of financial condition and results of operations appearing in the Company’s annual report to shareholders for the applicable year, (f) acquisitions or divestitures, and (g) foreign exchange gains and losses. To the extent such inclusions or exclusions affect Awards to Covered Employees, they shall be prescribed in a form that meets the requirements of Code Section 162(m) for deductibility.

11.3    Adjustment of Performance-Based Compensation. Awards that are designed to qualify as Performance-Based Compensation, and that are held by Covered Employees, may not be adjusted upward. The Committee shall retain the discretion to adjust such Awards downward, either on a formula or discretionary basis or any combination, as the Committee determines.

11.4    Committee Discretion. In the event that applicable tax and/or securities laws change to permit Committee discretion to alter the governing Performance Measures without obtaining shareholder approval of such changes, the Committee shall have sole discretion to make such changes without obtaining shareholder approval. In addition, in the event that the Committee determines that it is advisable to grant Awards that shall not qualify as Performance-Based Compensation, the Committee may make such grants without satisfying the requirements of Code Section 162(m) and base vesting on Performance Measures other than those set forth in Section 11.1.

12.1    Establishment of Incentive Pool. The Committee may designate Covered Employees who are eligible to receive a monetary payment in any Plan Year based on a percentage of an incentive pool equal to five (5%) of the Company’s Net Income for the Plan Year. The Committee shall allocate an incentive pool percentage to each designated Covered Employee for each Plan Year. In no event may (1) the incentive pool percentage for any one Covered Employee exceed fifty percent (50%) of the total pool and (2) the sum of the incentive pool percentages for all Covered Employees cannot exceed one hundred percent (100%) of the total pool.

12.2    Determination of Covered Employees’ Portions. As soon as possible after the determination of the incentive pool for a Plan Year, the Committee shall calculate each Covered Employee’s allocated portion of the incentive pool based upon the percentage established at the beginning of the Plan Year. Each Covered Employee’s incentive award then shall be determined by the Committee based on the Covered Employee’s allocated portion of the incentive pool subject to adjustment in the sole discretion of the Committee. In no event may the portion of the incentive pool allocated to a Covered Employee be increased in any way, including as a result of the reduction of any other Covered Employee’s allocated portion. The Committee shall retain the discretion to adjust such Awards downward.

All Awards to Nonemployee Directors shall be determined by the Board or Committee.

Any Participant selected by the Committee may be granted dividend equivalents based on the dividends declared on Shares that are subject to any Award, to be credited as of dividend payment dates, during the period between the date the Award is granted and the date the Award is exercised, vests or expires, as determined by the Committee. Such dividend equivalents shall be converted to cash or additional Shares by such formula and at such time and subject to such limitations as may be determined by the Committee.

Each Participant under the Plan may, from time to time, name any beneficiary or beneficiaries (who may be named contingently or successively) to whom any benefit under the Plan is to be paid in case of his or her death before he or she receives any or all of such benefit. Each such designation shall revoke all prior designations by the same Participant, shall be in a form prescribed by the Committee, and will be effective only when filed by the Participant in writing with the Company during the Participant’s lifetime. In the absence of any such designation, benefits remaining unpaid at the Participant’s death shall be paid to the Participant’s estate.

The Committee may permit or require a Participant to defer such Participant’s receipt of the payment of cash or the delivery of Shares that would otherwise be due to such Participant by virtue of the exercise of an Option or SAR, the lapse or waiver of restrictions with respect to Restricted Stock or Restricted Stock Units, or the satisfaction of any requirements or performance goals with respect to Performance Shares, Performance Units, Cash-Based Awards, Covered Employee Annual Incentive Awards, Other Stock-Based Awards, or Cash-Based Awards. If any such deferral election is required or permitted, the Committee shall, in its sole discretion, establish rules and procedures for such payment deferrals; provided, however, that only Participants who are within a select group of management or highly compensated employees shall be permitted or required to make deferrals as provided in this Article 16.

17.1    Employment. Nothing in the Plan or an Award Agreement shall interfere with or limit in any way the right of the Company, its Affiliates, and/or its Subsidiaries, to terminate any Participant’s employment or service on the Board or to the Company at any time or for any reason not prohibited by law, nor confer upon any Participant any right to continue his or her employment or service as a Director or Third Party Service Provider for any specified period of time.

Neither an Award nor any benefits arising under this Plan shall constitute an employment contract with the Company, its Affiliates, and/or its Subsidiaries and, accordingly, subject to Articles 3 and 19, this Plan and the benefits hereunder may be terminated at any time in the sole and exclusive discretion of the Committee without giving rise to any liability on the part of the Company, its Affiliates, and/or its Subsidiaries.

17.2    Participation. No individual shall have the right to be selected to receive an Award under this Plan, or, having been so selected, to be selected to receive a future Award.

17.3    Rights as a Shareholder. Except as otherwise provided herein, a Participant shall have none of the rights of a shareholder with respect to Shares covered by any Award until the Participant becomes the record holder of such Shares.

18.1    Change of Control of the Company. Upon the occurrence of a Change of Control, unless otherwise specifically prohibited under applicable laws or by the rules and regulations of any governing governmental agencies or national securities exchanges, or unless the Committee shall determine otherwise in the Award Agreement:

(a)    Any and all Options and SARs granted hereunder shall become immediately vested and exercisable to the extent that their Grant Price or Base Price, as adjusted pursuant to Section 4.4 and/or Article 19 is less than the Fair Market Value of a Share on such date; additionally, if a Participant’s employment is terminated for any reason except Cause within three (3) months prior to such Change of Control or within twelve (12) months subsequent to such Change of Control, the Participant shall have until the earlier of: (i) twelve (12) months following such termination date, or (ii) the expiration of the Option or SAR term, to exercise any such Option or SAR;

Participants as of a date, before or after such Change of Control, specified by the Committee, in which event the Committee shall thereupon cancel such Options and the Company shall pay to each Participant an amount of cash per Share equal to the excess, if any of the “Change of Control Value” of the Shares subject to such Option over the Option Price(s) under such Options for such Shares.

19.1    Amendment, Modification, Suspension, and Termination. Subject to Section 19.3, the Committee may, at any time and from time to time, alter, amend, modify, suspend, or terminate the Plan and any Award Agreement in whole or in part; provided, however, that, without the prior approval of the Company’s shareholders and except as provided in Sections 4.4 and 6.11 hereof, Options or SARs issued under the Plan will not be repriced, replaced, or regranted through cancellation, or by lowering the Option Price of a previously granted Option or the Grant Price of a previously granted SAR, and no amendment of the Plan shall be made without shareholder approval if shareholder approval is required by law, regulation, or stock exchange rule.

19.2    Adjustment of Awards Upon the Occurrence of Certain Unusual or Nonrecurring Events. The Committee may make adjustments in the terms and conditions of, and the criteria included in, Awards in recognition of unusual or nonrecurring events (including, without limitation, the events described in Section 4.4 hereof) affecting the Company or the financial statements of the Company or of changes in applicable laws, regulations, or accounting principles, whenever the Committee determines that such adjustments are appropriate in order to prevent unintended dilution or enlargement of the benefits or potential benefits intended to be made available under the Plan. The determination of the Committee as to the foregoing adjustments, if any, shall be conclusive and binding on Participants under the Plan.

19.3    Awards Previously Granted. Notwithstanding any other provision of the Plan to the contrary, no termination, amendment, suspension, or modification of the Plan or an Award Agreement shall adversely affect in any material way any Award previously granted under the Plan, without the written consent of the Participant holding such Award.

20.1    Tax Withholding. The Company shall have the power and the right to deduct or withhold, or require a Participant to remit to the Company, the minimum statutory amount to satisfy federal, state, and local taxes, domestic or foreign, required by law or regulation to be withheld with respect to any taxable event arising as a result of this Plan.

20.2    Share Withholding. With respect to withholding required upon the exercise of Options or SARs, upon the lapse of restrictions on Restricted Stock and Restricted Stock Units, or upon the achievement of performance goals related to Performance Shares, or any other taxable event arising as a result of an Award granted hereunder, Participants may elect, subject to the approval of the Committee, to satisfy the withholding requirement, in whole or in part, by having the Company withhold Shares having a Fair Market Value on the date the tax is to be determined equal to, but

not more than, the minimum statutory total tax that could be imposed on the transaction. All such elections shall be irrevocable, made in writing, and signed by the Participant, and shall be subject to any restrictions or limitations that the Committee, in its sole discretion, deems appropriate. In the event a Participant exercises an election under this Section and only satisfies the minimum statutory withholding requirement imposed on the relevant transaction in part, the Company shall have the power and the right to deduct or withhold, or require a Participant to remit to the Company, the remaining amount of the required minimum statutory withholding amount.

All obligations of the Company under the Plan with respect to Awards granted hereunder shall be binding on any successor to the Company, whether the existence of such successor is the result of a direct or indirect purchase, merger, consolidation, or otherwise, of all or substantially all of the business and/or assets of the Company.

22.1    Forfeiture Events.    

22.2    Legend. The certificates for Shares may include any legend which the Committee deems appropriate to reflect any restrictions on transfer of such Shares.

22.3    Gender and Number. Except where otherwise indicated by the context, any masculine term used herein also shall include the feminine, the plural shall include the singular, and the singular shall include the plural.

22.4    Severability. In the event any provision of the Plan shall be held illegal or invalid for any reason, the illegality or invalidity shall not affect the remaining parts of the Plan, and the Plan shall be construed and enforced as if the illegal or invalid provision had not been included.

22.5    Requirements of Law. The granting of Awards and the issuance of Shares under the Plan shall be subject to all applicable laws, rules, and regulations, and to such approvals by any governmental agencies or national securities exchanges as may be required.

22.6    Delivery of Title. The Company shall have no obligation to issue or deliver evidence of title for Shares issued under the Plan prior to:

22.7    Inability to Obtain Authority. The inability of the Company to obtain authority from any regulatory body having jurisdiction, which authority is deemed by the Company’s counsel to be necessary to the lawful issuance and sale of any Shares hereunder, shall relieve the Company of any liability in respect of the failure to issue or sell such Shares as to which such requisite authority shall not have been obtained.

22.8    Investment Representations. The Committee may require any person receiving Shares pursuant to an Award under this Plan to represent and warrant in writing that the person is acquiring the Shares for investment and without any present intention to sell or distribute such Shares.

22.9    Employees Based Outside of the United States. Notwithstanding any provision of the Plan to the contrary, in order to comply with the laws in other countries in which the Company, its Affiliates, and/or its Subsidiaries operate or have Employees, Directors, or Third Party Service Providers, the Committee, in its sole discretion, shall have the power and authority to:

(d)    Establish subplans and modify exercise procedures and other terms and procedures, to the extent such actions may be necessary or advisable. Any

subplans and modifications to Plan terms and procedures established under this Section 22.9 by the Committee shall be attached to this Plan document as appendices; and

(e)    Take any action, before or after an Award is made, that it deems advisable to obtain approval or comply with any necessary local government regulatory exemptions or approvals.

Notwithstanding the above, the Committee may not take any actions hereunder, and no Awards shall be granted, that would violate applicable law.

22.10    Uncertificated Shares. To the extent that the Plan provides for issuance of certificates to reflect the transfer of Shares, the transfer of such Shares may be effected on a noncertificated basis, to the extent not prohibited by applicable law or the rules of any stock exchange.

22.11    Unfunded Plan. Participants shall have no right, title, or interest whatsoever in or to any investments that the Company, and/or its Subsidiaries, and/or Affiliates may make to aid it in meeting its obligations under the Plan. Nothing contained in the Plan, and no action taken pursuant to its provisions, shall create or be construed to create a trust of any kind, or a fiduciary relationship between the Company and any Participant, beneficiary, legal representative, or any other person. To the extent that any person acquires a right to receive payments from the Company, and/or its

Subsidiaries, and/or Affiliates under the Plan, such right shall be no greater than the right of an unsecured general creditor of the Company, a Subsidiary, or an Affiliate, as the case may be. All payments to be made hereunder shall be paid from the general funds of the Company, a Subsidiary, or an Affiliate, as the case may be and no special or separate fund shall be established and no segregation of assets shall be made to assure payment of such amounts except as expressly set forth in the Plan.

22.12    No Fractional Shares. No fractional Shares shall be issued or delivered pursuant to the Plan or any Award. The Committee shall determine whether cash, Awards, or other property shall be issued or paid in lieu of fractional Shares or whether such fractional Shares or any rights thereto shall be forfeited or otherwise eliminated.

22.13    Retirement and Welfare Plans. Neither Awards made under the Plan nor Shares or cash paid pursuant to such Awards, except pursuant to Covered Employee Annual Incentive Awards, may be included as “compensation” for purposes of computing the benefits payable to any Participant under the Company’s or any Subsidiary’s or Affiliate’s retirement plans (both qualified and non-qualified) or welfare benefit plans unless such other plan expressly provides that such compensation shall be taken into account in computing a participant’s benefit.

22.14    Nonexclusivity of the Plan. The adoption of this Plan shall not be construed as creating any limitations on the power of the Board or Committee to adopt such other compensation arrangements as it may deem desirable for any Participant.

22.15    No Constraint on Corporate Action. Nothing in this Plan shall be construed to: (i) limit, impair, or otherwise affect the Company’s or a Subsidiary’s or an Affiliate’s right or power to make adjustments, reclassifications, reorganizations, or changes of its capital or business structure, or to merge or consolidate, or dissolve, liquidate, sell, or transfer all or any part of its business or assets; or, (ii) limit the right or power of the Company or a Subsidiary or an Affiliate to take any action which such entity deems to be necessary or appropriate.

22.16    Governing Law. The Plan and each Award Agreement shall be governed by the laws of the State of Texas, excluding any conflicts or choice of law rule or principle that might otherwise refer construction or interpretation of the Plan to the substantive law of another jurisdiction. Unless otherwise provided in the Award Agreement, recipients of an Award under the Plan are deemed to submit to the exclusive jurisdiction and venue of the federal or state courts of Texas, to resolve any and all issues that may arise out of or relate to the Plan or any related Award Agreement.

22.17    Indemnification. Each person who is or shall have been a member of the Board, or a Committee appointed by the Board, or an officer of the Company to whom authority was delegated in accordance with Article 3 shall be indemnified and held harmless by the Company against and from any loss, cost, liability, or expense that may be imposed upon or reasonably incurred by him or her in connection with or resulting from any claim, action, suit, or proceeding to which he or she may be a party or in which he or she may be involved by reason of any action taken or failure to act under the Plan and against and from any and all amounts paid by him or her in settlement thereof, with the Company’s approval, or paid by him or her in satisfaction of any judgement in any such action, suit, or proceeding against him or her, provided he or she shall give the Company an opportunity, at its own expense, to handle and defend the same before he or she undertakes to handle and defend it on his or her own behalf, unless such loss, cost, liability, or expense is a result of his or her own willful misconduct or except as expressly provided by statute.

The foregoing right of indemnification shall not be exclusive of any other rights of indemnification to which such persons may be entitled under the Company’s Certificate of Incorporation of Bylaws, as a matter of law, or otherwise, or any power that the Company may have to indemnify them or hold them harmless.