Jones Act Anti-Dilution Warrant Agreement, dated as of September 4, 2020, between Hornbeck Offshore Services, Inc. and Computershare, Inc. and Computershare Trust Company, N.A

Exhibit 4.4

Execution Version

JONES ACT ANTI-DILUTION WARRANT AGREEMENT

Between

Hornbeck Offshore Services, Inc.,

AS ISSUER,

And

Computershare, Inc. and

Computershare Trust Company, N.A.,

collectively, AS WARRANT AGENT

September 4, 2020

TABLE OF CONTENTS

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This JONES ACT ANTI-DILUTION WARRANT AGREEMENT (this “Agreement”) is dated as of September 4, 2020, between Hornbeck Offshore Services, Inc., a Delaware corporation, as issuer (the “Company”), and Computershare, Inc., a Delaware corporation, and its wholly owned subsidiary, Computershare Trust Company, N.A., a federally chartered trust company (collectively, including any successors thereto, the “Warrant Agent”).

W I T N E S S E T H

WHEREAS, in connection with the financial restructuring of the Company and certain of its subsidiaries (collectively, the “Debtors”) pursuant to the Debtors’ Joint Prepackaged Chapter 11 Plan of Reorganization (the “Plan”) under chapter 11 of title 11 of the United States Code, 11 U.S.C. §§101 et. seq., the Company has agreed to issue to certain creditors of the Company as of immediately prior to the consummation of the restructuring contemplated by the Plan warrants which are exercisable or convertible to purchase shares of the Company’s common stock, par value $0.00001 per share (“Common Stock”), subject to adjustment as provided herein (the “Jones Act Common Stock Warrants”), in each case to the extent each such creditor cannot establish to the Company’s reasonable satisfaction (during the time period provided under the Plan) that it is or will continue to be a U.S. Citizen (as defined below) for purposes of the Company’s compliance with the Jones Act (as defined below) and to the extent that the issuance of such shares of Common Stock under the Plan to such creditor would result in Excess Shares (as defined below) if they were issued;

WHEREAS, in accordance with the terms of the Jones Act Common Stock Warrants, in the event that cash dividends are paid on the Common Stock, then the holders of the Jones Act Common Stock Warrants will each be issued warrants to purchase Demand Notes (as defined below) as further set forth in this Agreement (the “Warrants”);

WHEREAS, the Company desires to engage the Warrant Agent to act on behalf of the Company in connection with the issuance, registration, transfer, exchange, replacement, exercise, conversion and cancellation of the Warrants;

WHEREAS, the Warrant Agent, at the request of the Company, has agreed to act as the agent of the Company in connection with the issuance, transfer, exchange, replacement, exercise and conversion of the Warrants as provided herein; and

WHEREAS, the Company desires to enter into this Agreement to set forth the terms and conditions of the Warrants and the rights of the Holders thereof.

NOW, THEREFORE, in consideration of the premises and mutual agreements herein set forth, the parties hereto agree as follows:

SECTION 1. Certain Defined Terms. Whenever used in this Agreement, the following words and phrases, unless the context otherwise requires, shall have the meanings specified in this Section 1. Capitalized terms used but not defined herein shall have the meaning ascribed to such terms in the Securityholders Agreement (as defined below).

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“Act of Bankruptcy” means, with respect to any Person, the occurrence of any of the following events, conditions or circumstances: (a) such Person files a voluntary petition in bankruptcy or files any petition or consent seeking any reorganization, arrangement, composition, readjustment, liquidation, dissolution or similar relief for itself under the Bankruptcy Code or any present or future applicable federal, state or other statute or law relating to bankruptcy, insolvency, reorganization or other relief for debtors, or seeks or consents to, or acquiesces in, the appointment of any trustee, receiver, conservator or liquidator of such Person or of all or any substantial part of its properties (the term “acquiesce,” as used in this definition, includes the failure to file a petition or motion to vacate or discharge any order, judgment or decree within twenty (20) days, after entry of such order, judgment or decree); or (b) such Person makes a general assignment for the benefit of creditors or take any other similar action for the protection or benefit of creditors.

“Affected Holder” has the meaning specified in Section 14 hereof.

“Agreement” has the meaning specified in the preamble hereof.

“Anti-Dilution Amount” means the principal amount of a Demand Note as determined in accordance with the Jones Act Warrant Agreement.

“Applicable Law” means all applicable provisions of (i) constitutions, treaties, statutes, laws (including the common law), rules, regulations, decrees, ordinances, codes, proclamations, declarations or orders of any Governmental Authority, including the Jones Act; (ii) any consents or approvals of any Governmental Authority; and (iii) any orders, decisions, advisory or interpretative opinions, injunctions, judgments, awards, decrees of, or agreements with, any Governmental Authority.

“Appropriate Officer” has the meaning specified in Section 3(c) hereof.

“Bankruptcy Code” means title 11 of the United States Code, 11 U.S.C. §§ § 101 et seq.

“Business Day” means any day that is not a Saturday, Sunday, or other day on which state or federally chartered banking institutions in New York City, New York are not required to be opened.

“Cash Closing” has the meaning specified in Section 8 hereof.

“Cash Sale” means any merger, consolidation or other similar transaction to which the Company is a party and in which holders of Common Stock as of immediately prior to the consummation of such transaction (other than with respect to treasury shares and any shares of Common Stock held by the purchasing party(ies) in such transaction) are entitled to receive consideration consisting solely of cash upon cancellation of such Common Stock in such transaction.

“Charter” means, with respect to any Person, such Person’s certificate or articles of incorporation, certificate of formation, articles of association or similar organizational document, in each case as may be amended from time to time.

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“Commission” means the United States Securities and Exchange Commission.

“Common Stock” has the meaning specified in the recitals hereof.

“Company Liquidation Event” means any liquidation, dissolution or winding-up of the affairs of the Company, the termination of the legal existence of the Company or any Act of Bankruptcy or any other similar event or proceeding with respect to the Company, whether voluntary or involuntary, pursuant to which the holders of Common Stock are (subject to the liquidation preferences set forth in the Company’s Charter) entitled to receive consideration consisting solely of cash.

“Company Conversion Notice” has the meaning specified in Section 5(n)(ii) hereof.

“Definitive Warrants” has the meaning specified in Section 4(i)(i) hereof.

“Demand Note” means a non-interest bearing demand note issuable by the Company in the form attached as Exhibit D in connection with the exercise of a Warrant.

“Depository” has the meaning specified in Section 3(b) hereof.

“Direct Registration Warrant” has the meaning specified in Section 3(a) hereof.

“Excess Shares” has the meaning specified in the Company’s Charter.

“Exercise Price” means the exercise price for the Warrants as set forth in Section 5(b) hereof.

“Expiration Date” has the meaning specified in Section 5(a) hereof.

“Funds” has the meaning specified in Section 11(q) hereof.

“Global Warrant Certificate” has the meaning specified in Section 3(b) hereof.

“Governmental Authority” means any federal, state, local or foreign government or political subdivision thereof, or any agency or instrumentality of such government or political subdivision, including the U.S. Coast Guard and the U.S. Maritime Administration, or any self-regulated organization or other non-governmental regulatory authority or quasi-governmental authority (to the extent that the rules, regulations or orders of such organization or authority have the force of law), or any arbitrator, court or tribunal of competent jurisdiction.

“Holder” means the beneficial or registered holder or holders of Warrants, unless the context otherwise requires.

“Individual Warrant Certificate” has the meaning specified in Section 3(b) hereof.

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“Jones Act” shall mean, collectively, the U.S. citizenship and cabotage laws principally contained in 46 U.S.C. § 50501(a), (b) and (d) and 46 U.S.C. Chapters 121 and 551 and any successor statutes thereto, together with the rules and regulations promulgated thereunder by the U.S. Coast Guard and the U.S. Maritime Administration and their practices enforcing, administering and interpreting such laws, statutes, rules and regulations, in each case as amended or supplemented from time to time, relating to the ownership and operation of U.S.-flag vessels in the U.S. Coastwise Trade.

“Jones Act Common Stock Warrants” has the meaning specified in the recitals hereof.

“Jones Act Warrant Agreement” means that certain Jones Act Warrant Agreement, dated as of September 4, 2020, by and between the Company and the Warrant Agent, as may be amended from time to time.

“Non-U.S. Citizen” means any Person who is not a U.S. Citizen.

“Person” means any individual, corporation, general partnership, limited partnership, limited liability partnership, joint venture, association, joint-stock company, trust, limited liability company, unincorporated organization or government or any agency or political subdivision thereof.

“Plan” has the meaning specified in the recitals hereof.

“Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated by the Commission thereunder.

“Securityholders Agreement” means that certain Securityholders Agreement, dated as of September 4, 2020, by and between the Company and the holders of Common Stock and/or Warrants party thereto from time to time, and the other parties thereto, as may be amended from time to time.

“Settlement Date” means the date that is the third Business Day after a Warrant Exercise Notice is delivered.

“Signature Guarantee” has the meaning specified in Section 4(d)(ii).

“U.S. Citizen” shall mean a citizen of the United States within the meaning of the Jones Act, eligible and qualified to own and operate U.S.-flag vessels in the U.S. Coastwise Trade.

“U.S. Coastwise Trade” shall mean the carriage or transport of merchandise or passengers in the coastwise trade of the United States of America within the meaning of 46 U.S.C. Chapter 551 and any successor statutes thereto, as amended or supplemented from time to time.

“Warrant Agent” has the meaning specified in the preamble hereof.

“Warrant Agent Office” has the meaning specified in Section 4(h)(iv) hereof.

“Warrant Certificate” has the meaning specified in Section 3(b) hereof.

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“Warrant Exercise Notice” has the meaning specified in Section 5(c) hereof.

“Warrant Register” has the meaning specified in Section 3(d) hereof.

“Warrant Statement” has the meaning specified in Section 3(b) hereof.

“Warrant Summary” has the meaning specified in Section 3(b) hereof.

“Warrants” has the meaning specified in the recitals hereof.

SECTION 2. Appointment of Warrant Agent. The Company hereby appoints the Warrant Agent to act as agent for the Company in accordance with the express terms and conditions set forth in this Agreement (and no implied terms and conditions), and the Warrant Agent hereby accepts such appointment and agrees to perform the same in accordance with the express terms and conditions set forth in this Agreement.

SECTION 3. Issuance of Warrants; Form, Execution and Delivery.

(a) Issuance of Warrants. From time to time, the Warrants shall be issued by the Company with such underlying principal amount of Demand Notes as determined in accordance with the Jones Act Warrant Agreement and this Agreement. In accordance with Section 4 hereof, the Company shall, at its option, cause to be issued to the Depository one or more Global Warrant Certificates evidencing the Warrants, issue the Warrants in the form of Individual Warrant Certificates or reflect the issuance of the Warrants by book-entry registration on the books and records of the Warrant Agent (“Direct Registration Warrants”). To the extent the Warrants are issued in the form of Global Warrant Certificates, the Company shall cause to be issued to the recipients thereof Warrants in the form of Global Warrant Certificates through the facilities of the Depository. Each Direct Registration Warrant and each Warrant evidenced by a Global Warrant Certificate or Individual Warrant Certificate shall entitle the Holder, upon proper exercise and payment or conversion of such Warrant, to receive from the Company, as adjusted as provided herein and subject to the Jones Act limitations on exercise by Non-U.S. Citizens set forth in Section 5(l) hereof, if applicable, a Demand Note with an aggregate principal amount equal to the applicable Anti-Dilution Amount.

(b) Form of Warrant. Subject to Section 4 of this Agreement, each of the Warrants shall be issued, at the Company’s option (i) in the form of one or more global certificates (the “Global Warrant Certificates”) in substantially the form of Exhibit A-1 attached hereto, with the form of assignment to be printed on the reverse thereof, in substantially the form set forth in Exhibit B attached hereto, (ii) in certificated form in the form of one or more individual certificates (the “Individual Warrant Certificates”) in substantially the form of Exhibit A-2 attached hereto, with the form of assignment to be printed on the reverse thereof, in substantially the form set forth in Exhibit B attached hereto, and/or (iii) in the form of Direct Registration Warrants reflected on statements issued by the Warrant Agent from time to time to the Holders thereof reflecting such book-entry position (the “Warrant Statements”). Upon the issuance of Global Warrant Certificates, any Individual Warrant Certificates or Direct Registration Warrants that are not subject to any transfer restrictions under applicable securities laws may be exchanged at any time for Global

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Warrant Certificates representing a corresponding number of Warrants, in accordance with Section 4(e) and the applicable procedures of the Depository and the Warrant Agent. The Warrant Statements representing Warrants shall include as an attachment thereto the “Warrant Summary” as set forth in Exhibit C attached hereto. The Global Warrant Certificates and Individual Warrant Certificates (collectively, the “Warrant Certificates”) and Warrant Statements may bear such appropriate insertions, omissions, substitutions and other variations as are required or permitted by this Agreement, and may have such letters, numbers or other marks of identification and such legends or endorsements placed thereon as may be required to comply with the rules and regulations of The Depository Trust Company or any successor thereof (the “Depository”) in the case of the Global Warrant Certificates, with any law or with any rules made pursuant thereto or with any rules of any securities exchange or as may be determined, consistently herewith and reasonably acceptable to the Warrant Agent and provided, in each case, that they do not affect the rights, duties, obligations, responsibilities, liabilities or indemnities of the Warrant Agent, by (i) in the case of Warrant Certificates, the Appropriate Officers executing such Warrant Certificates, as evidenced by their execution of the Warrant Certificates and (ii) in the case of Warrant Statements, any Appropriate Officer. The Global Warrant Certificates shall be deposited as and when appropriate with the Warrant Agent and registered in the name of Cede & Co. or any successor thereof, as the Depository’s nominee. Each Warrant Certificate shall represent such number of the outstanding Warrants as specified therein, and each shall provide that it shall represent the aggregate amount of outstanding Warrants from time to time endorsed thereon and that the aggregate amount of outstanding Warrants represented thereby may from time to time be reduced or increased, as appropriate, in accordance with the terms of this Agreement.

(c) Execution of Warrants. Warrant Certificates shall be signed on behalf of the Company by its Chief Executive Officer, its President, its Chief Financial Officer, its General Counsel, its Treasurer or any Executive or Senior Vice President of the Company (each, an “Appropriate Officer”), and by the Corporate Secretary or any Assistant Corporate Secretary of the Company. Each such signature upon the Warrant Certificates may be in the form of an electronic signature of any such Appropriate Officer, Corporate Secretary or Assistant Corporate Secretary and may be imprinted or otherwise reproduced on the Warrant Certificates and for that purpose the Company may adopt and use the electronic signature of any Appropriate Officer, the Corporate Secretary or any Assistant Corporate Secretary who shall have been serving as an Appropriate Officer, the Corporate Secretary, or an Assistant Corporate Secretary at the time of entering into this Agreement or issuing such Warrant Certificate. If any Appropriate Officer, the Corporate Secretary or any Assistant Corporate Secretary who shall have signed any of the Warrant Certificates shall cease to be such Appropriate Officer, the Corporate Secretary or an Assistant Corporate Secretary before the Warrant Certificates so signed shall have been countersigned by the Warrant Agent or disposed of by the Company, such Warrant Certificates nevertheless may be countersigned and delivered or disposed of as though such Appropriate Officer, Corporate Secretary or Assistant Corporate Secretary had not ceased to be such Appropriate Officer, Corporate Secretary or Assistant Corporate Secretary, and any Warrant Certificate may be signed on behalf of the Company by any person who, at the actual date of the execution of such Warrant Certificate, shall be a proper Appropriate Officer, Corporate Secretary or Assistant Corporate Secretary, although at the date of the execution of this Agreement any such person was not such Appropriate Officer, Corporate Secretary or Assistant Corporate Secretary. Warrant Certificates shall be dated the date of countersignature by the Warrant Agent and shall represent one or more whole Warrants.

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(d) Countersignature. Upon receipt of a written order of the Company signed by an Appropriate Officer instructing the Warrant Agent to countersign and accompanied by Warrant Certificates duly executed on behalf of the Company, the Warrant Agent shall countersign (in manual, facsimile or electronic form) one or more Warrant Certificates evidencing the Warrants and shall deliver such Warrant Certificates to or upon such written order of the Company. Such written order of the Company shall specifically state the number of Warrants that are to be represented by such Warrant Certificate and the Warrant Agent may rely conclusively on such order. Each Warrant shall be, and shall remain, subject to the provisions of this Agreement until such time as all of the Warrants evidenced thereby shall have been duly exercised or converted or shall have expired or been canceled in accordance with the terms hereof. Each Holder shall be bound by all of the terms and provisions of this Agreement (a copy of which is available on request to the Corporate Secretary of the Company) and any amendments thereto as fully and effectively as if such Holder had signed the same. No Warrant Certificate shall be valid for any purpose, and no Warrant evidenced thereby shall be exercisable or convertible, until such Warrant Certificate has been countersigned by the manual, facsimile or electronic signature of the Warrant Agent. Such signature by the Warrant Agent upon any Warrant Certificate executed by the Company shall be conclusive evidence that such Warrant Certificate so countersigned has been duly issued hereunder. The Warrant Agent shall keep, at an office designated for such purpose, books (the “Warrant Register”) in which, subject to such reasonable regulations as it may prescribe, it shall register any Warrant Certificates or Direct Registration Warrants and exchanges and transfers of outstanding Warrants in accordance with the procedures set forth in Section 4 of this Agreement, all in form satisfactory to the Company and the Warrant Agent. The Company or the Warrant Agent may require payment of a sum sufficient to cover any stamp or other tax or other governmental charge that may be imposed on the Holder in connection with any such exchange or registration of transfer. The Warrant Agent shall have no obligation to effect an exchange or register a transfer unless and until any payments required by the immediately preceding sentence have been made. Prior to due presentment for registration of transfer or exchange of any Warrant in accordance with the procedures set forth in this Agreement, the Warrant Agent and the Company may deem and treat the Person in whose name any Warrant is registered as the absolute owner of such Warrant (notwithstanding any notation of ownership or other writing made in a Warrant Certificate by anyone), for the purpose of any exercise or conversion thereof, any distribution to the Holder thereof and for all other purposes.

SECTION 4. Transfer or Exchange.

(a) Transfers Generally. Notwithstanding anything herein to the contrary, the Warrants shall be fully transferrable (subject to applicable securities laws) and severable from the Jones Act Common Stock Warrants.

(b) Transfer and Exchange of Global Warrant Certificates or Beneficial Interests Therein. The transfer and exchange of Global Warrant Certificates or beneficial interests therein shall be effected through the Depository, in accordance with the terms of this Agreement and the Warrant Certificates and the procedures of the Depository.

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(c) Exchange of a Beneficial Interest in a Global Warrant Certificate for an Individual Warrant Certificate or Direct Registration Warrant.

(i) Any Holder of a beneficial interest represented by a Global Warrant Certificate may, upon request, exchange such beneficial interest for a Direct Registration Warrant or a Warrant represented by an Individual Warrant Certificate. A transferor of a beneficial interest represented by a Global Warrant Certificate (or the Depository or its nominee on behalf of such transferor) shall, but only to the extent required by the procedures of the Depository and the Warrant Agent in connection with such transfer or exchange, deliver to the Warrant Agent (I) written instructions or such other form of instructions as is customary for the Depository on behalf of any Person having a beneficial interest in a Global Warrant Certificate, and all other reasonably necessary information, and (II) an instruction of transfer in form reasonably satisfactory to the Warrant Agent which, with respect to a transfer of a Global Warrant Certificate only, shall be properly completed, duly authorized in writing and duly executed by the Holder thereof or by such Holder’s attorney. Upon satisfaction of the conditions in this Section 4(c)(i), the Warrant Agent shall cause, in accordance with the standing instructions and procedures existing between the Depository and the Warrant Agent, the number of Warrants represented by the Global Warrant Certificate to be reduced by the number of Warrants to be represented by an Individual Warrant Certificate or Direct Registration Warrant, as the case may be, to be issued in exchange for the beneficial interest of such Person in the Global Warrant Certificate and, following such reduction, (A) in the case of an exchange for an Individual Warrant Certificate (x) the Company shall issue and the Warrant Agent shall either manually, facsimile or electronically countersign an Individual Warrant Certificate representing the appropriate number of Warrants and (y) the Warrant Agent shall deliver such Individual Warrant Certificate to the registered Holder thereof, or (B) in the case of an exchange for a Direct Registration Warrant, the Warrant Agent shall register such Direct Registration Warrants in accordance with such written instructions from the Depository and deliver to such Holder a Warrant Statement.

(ii) Warrants represented by an Individual Warrant Certificate issued in exchange for a beneficial interest in a Global Warrant Certificate pursuant to this Section 4(c) shall be issued in such names as the Depository, pursuant to instructions from its direct or indirect participants or otherwise, shall instruct the Warrant Agent. The Warrant Agent shall deliver Individual Warrant Certificates evidencing such issuance to the Persons in whose names such Individual Warrant Certificates are so issued. Direct Registration Warrants issued in exchange for a beneficial interest in a Global Warrant Certificate pursuant to this Section 4(c) shall be registered in such names as the Depository, pursuant to instructions from its direct or indirect participants or otherwise, shall instruct the Warrant Agent.

(d) Transfer and Exchange of Individual Warrant Certificates or Direct Registration Warrants. When the registered Holder of an Individual Warrant Certificate or Direct Registration Warrant has presented to the Warrant Agent a written request:

(i) to register the transfer of any Individual Warrant Certificate or Direct Registration Warrant; or

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(ii) to exchange any Individual Warrant Certificate or Direct Registration Warrant for a Direct Registration Warrant or an Individual Warrant Certificate, respectively, representing an equal number of Warrants of authorized denominations,

the Warrant Agent shall register the transfer or make the exchange as requested if (x) its customary requirements for such transactions are met and (y) such transfer or exchange otherwise satisfies the provisions of this Agreement; provided, however, that the Warrant Agent has received a written instruction of transfer or exchange, as applicable, in form reasonably satisfactory to the Warrant Agent, properly completed and duly executed by the Holder thereof or by his attorney, accompanied by a signature guarantee (“Signature Guarantee”) from an eligible guarantor institution participating in a signature guarantee program approved by the Securities Transfer Association, duly authorized in writing and a written order of the Company signed by an Appropriate Officer authorizing such exchange. A party requesting transfer of Warrants must provide any evidence of authority that may be reasonably required by the Warrant Agent.

(e) Restrictions on Transfer and Exchange of Individual Warrant Certificates or Direct Registration Warrants for a Beneficial Interest in a Global Warrant Certificate. Neither an Individual Warrant Certificate nor a Direct Registration Warrant may be exchanged for a beneficial interest in a Global Warrant Certificate pursuant to this Agreement except, following the issuance of a Global Warrant Certificate by the Company, upon satisfaction of the requirements set forth below. Upon receipt by the Warrant Agent of the Company’s written approval and appropriate instruments of transfer, accompanied by a Signature Guarantee, with respect to an Individual Warrant Certificate or Direct Registration Warrant that is not subject to transfer restrictions under applicable securities laws, in form reasonably satisfactory to the Warrant Agent, together with written instructions directing the Warrant Agent to make, or to direct the Depository to make, an endorsement on the applicable Global Warrant Certificate to reflect an increase in the number of Warrants represented by such Global Warrant Certificate equal to the number of Warrants represented by such Individual Warrant Certificate or Direct Registration Warrant, and all other necessary information, then the Warrant Agent shall cancel such Individual Warrant Certificate or Direct Registration Warrant on the Warrant Register and cause, or direct the Depository to cause, in accordance with the standing instructions and procedures existing between the Depository and the Warrant Agent, the number of Warrants represented by such Global Warrant Certificate to be increased accordingly. Any such transfer shall be subject to the Company’s prior written approval.

(f) Restrictions on Transfer and Exchange of Global Warrant Certificates. Notwithstanding any other provisions of this Agreement (other than the provision set forth in Section 4(g)), a Global Warrant Certificate may not be transferred as a whole except by the Depository to a nominee of the Depository or by a nominee of the Depository to the Depository or another nominee of the Depository or by the Depository or any such nominee to a successor Depository or a nominee of such successor Depository.

(g) Cancellation of Warrant Certificate.

(i) At such time as all beneficial interests in Warrant Certificates and Direct Registration Warrants have been exchanged for Demand Notes in accordance herewith, redeemed, repurchased or cancelled, all Warrant Certificates shall be returned to, or cancelled and retained pursuant to Applicable Law by, the Warrant Agent, upon written instructions from the Company reasonably satisfactory to the Warrant Agent.

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(ii) If at any time the Depository for the Global Warrant Certificates notifies the Company that the Depository is unwilling or unable to continue as Depository for the Global Warrant Certificates and a successor Depository for the Global Warrant Certificates is not appointed by the Company within ninety (90) days after delivery of such notice, then the Warrant Agent, upon written instructions signed by an Appropriate Officer of the Company, shall register Individual Warrants Certificates and Direct Registration Warrants, in an aggregate number equal to the number of Warrants represented by the Global Warrant Certificates, in exchange for such Global Warrant Certificates.

(h) Obligations with Respect to Transfers and Exchanges of Warrants.

(i) To permit registrations of transfers and exchanges, the Company shall execute and the Warrant Agent is hereby authorized to countersign, either by manual, facsimile or electronic signature, in accordance with the provisions of this Section 4, Warrant Certificates, as required pursuant to the provisions of this Section 4.

(ii) All Warrant Certificates or Direct Registration Warrants issued upon any registration of transfer or exchange shall be the valid obligations of the Company, entitled to the same benefits under this Agreement as the Warrant Certificates or Direct Registration Warrants surrendered upon such registration of transfer or exchange.

(iii) So long as the Depository, or its nominee, is the registered owner of a Global Warrant Certificate, the Depository or such nominee, as the case may be, will be considered the sole owner or Holder represented by such Global Warrant Certificate for all purposes under this Agreement, including, without limitation, for the purposes of (a) giving notices with respect to such Warrants and (b) registering transfers with respect to such Warrants. Neither the Company nor the Warrant Agent, in its capacity as registrar for such Warrants, will have any responsibility or liability for any aspect of the records relating to beneficial interests in a Global Warrant Certificate or for maintaining, supervising or reviewing any records relating to such beneficial interests.

(iv) The Warrant Agent shall register the transfer of any outstanding Warrants in the Warrant Register at the Warrant Agent office designated for such purpose (the “Warrant Agent Office”) upon (a) receipt of all information required to be delivered hereunder, (b) if applicable, surrender of duly endorsed Warrant Certificates representing such Warrants, and (c) receipt of a completed form of assignment duly authorized in writing substantially in the form attached as Exhibit C hereto, as the case may be, duly signed by the Holder thereof or by the duly appointed legal representative thereof or by such Holder’s attorney, accompanied by a Signature Guarantee. Upon any such registration of transfer, a new Warrant Certificate or Warrant Statement, as the case may be, shall be issued to the transferee.

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(v) The Warrant Agent shall not undertake the duties and obligations of a stock transfer agent under this Agreement, or otherwise, including, without limitation, the duty to receive, issue or transfer Demand Notes.

(i) Definitive Warrants.

(i) Beneficial interests represented by a Global Warrant Certificate deposited with the Depository or with the Warrant Agent pursuant to Section 3(b) shall be transferred to each beneficial owner thereof in the form of Warrant Certificates in a definitive form that is not deposited with the Depository or with the Warrant Agent as custodian for the Depository (“Definitive Warrants”) evidencing a number of Warrants equivalent to such owner’s beneficial interest in such Global Warrant Certificate, in exchange for such Global Warrant Certificate, only if such transfer complies with Section 4(a) and (i) the Depository notifies the Company in writing that it is unwilling or unable to continue as Depository for such beneficial interests represented by such Global Warrant Certificate or if at any time the Depository ceases to be a “clearing agency” registered under the Securities and Exchange Act of 1934, as amended, or the rules promulgated thereunder, and, in each such case, a successor Depository is not appointed by the Company within ninety (90) days of such notice or (ii) upon the request of any Holder or beneficial owner, if the Company shall be adjudged bankrupt or insolvent or makes an assignment for the benefit of its creditors or institutes proceedings to be adjudicated bankrupt or shall consent to the filing of a bankruptcy proceeding against it, or shall file a petition or answer or consent seeking reorganization under federal bankruptcy laws or any other similar applicable federal or state law, or shall consent to the filing of any such petition, or shall consent to the appointment of a receiver or custodian of all or any substantial part of its property, or shall admit in writing its inability to pay or meet its debts as they mature, or if a receiver or custodian of it or all or any substantial part of its property shall be appointed, or if a public officer shall have taken charge or control of the Company or of its property or affairs, for the purpose of rehabilitation, conservation or liquidation.

(ii) Any beneficial interests represented by a Global Warrant Certificate that are transferable to the beneficial owners thereof in the form of Definitive Warrants pursuant to this Section 4(i) shall be surrendered by the Depository to the Warrant Agent, to be so transferred, in whole or from time to time in part, without charge, and the Warrant Agent shall if directed by an Appropriate Officer of the Company countersign, by either manual, facsimile or electronic signature, and deliver to each beneficial owner in the name of such beneficial owner, upon such transfer of each portion of such beneficial interests represented by a Global Warrant Certificate, Definitive Warrants evidencing a number of Warrants equivalent to such beneficial owner’s beneficial interest in the Global Warrant Certificate. The Warrant Agent shall register such transfer in the Warrant Register, and upon such transfer the surrendered Global Warrant Certificate shall be cancelled by the Warrant Agent.

(iii) All Definitive Warrants issued upon registration of transfer pursuant to this Section 4(i) shall be valid obligations of the Company, evidencing the same obligations of the Company and entitled to the same benefits under this Agreement and the Global Warrant Certificate surrendered for registration of such transfer.

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(iv) Subject to the provisions of Section 4(i)(ii), the registered Holder of a Global Warrant Certificate may grant proxies and otherwise authorize any Person to take any action that such Holder is entitled to take under this Agreement or the Warrants.

(v) In the event of the occurrence of any of the events specified in Section 4(i)(i), the Company will promptly make available to the Warrant Agent a reasonable supply of Definitive Warrants necessary to comply with this Agreement in definitive, fully registered form.

(vi) Neither the Company nor the Warrant Agent shall be liable or responsible for any registration or transfer of any Warrants that are registered or to be registered in the name of a fiduciary or the nominee of a fiduciary.

(j) Securityholders Agreement. Notwithstanding anything herein to the contrary, no Person may Transfer any Warrant except in compliance with the provisions of the Securityholders Agreement, if the Securityholders Agreement is then in effect, and the Company’s Charter.

SECTION 5. Duration and Exercise of Warrants.

(a) Duration. The Warrants may be exercised only during the period commencing on the date of issuance of the Warrant and expiring on the date on which no Warrants remain outstanding (the “Expiration Date”). After 5:00 p.m. New York City time on the Expiration Date, the Warrants will become void and without further legal effect, and all rights thereunder and all rights in respect thereof under this Agreement shall cease as of such time.

(b) Exercise Price. The Exercise Price for the Warrants shall be $0.00.

(c) Manner of Exercise. Subject to the provisions of this Agreement, including the Jones Act limitations on ownership and control of capital stock of the Company by Non-U.S. Citizens, including those set forth in Section 5(l) hereof, each Warrant shall entitle the Holder thereof to purchase from the Company a Demand Note at the Exercise Price. Each Demand Note will bear a principal amount equal to the applicable Anti-Dilution Amount. All or any of the Warrants represented by a Warrant Certificate or in the form of Direct Registration Warrants may be exercised by the registered Holder thereof during normal business hours on any Business Day, by delivering (A) written notice of such election (a “Warrant Exercise Notice”) to exercise Warrants to the Company (at the address set forth in Section 13) and the Warrant Agent at the Warrant Agent Office, no later than 5:00 p.m., New York City time, on the Expiration Date, which Warrant Exercise Notice shall be (i) substantially in the “Form of Election” set forth in Exhibit A-1, in the case of Warrants represented by a Global Warrant Certificate or otherwise in accordance with applicable procedures of the Depository, (ii) substantially in the “Form of Election” set forth in Exhibit A-2, in the case of Warrants represented by Individual Warrant Certificates and (iii) substantially in the form set forth in Exhibit A-3, in the case of Direct Registration Warrants; and (B) by no later than 5:00 p.m., New York City time, on the Business Day immediately prior to the Settlement Date, such Warrants to the Warrant Agent (by book-entry transfer through the facilities of the Depository, if such Warrants are represented by a Global Warrant Certificate), accompanied by a Signature Guarantee and payment in full in respect of each Warrant that is exercised (which shall be made by delivery of a certified or official bank or bank cashier’s check payable to the

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order of the Company, or by wire transfer to an account specified in writing by the Company or the Warrant Agent in immediately available funds or, in respect of any Global Warrant Certificate, otherwise in accordance with applicable procedures of the Depository). Such payment shall be in an amount equal to the product of the number of Demand Notes designated in such Warrant Exercise Notice multiplied by the Exercise Price for the Warrants being exercised. Upon such surrender and payment, such Holder shall thereupon be entitled to receive the number of duly authorized Demand Notes in the principal amounts as set forth in Section 5(d) and Section 5(h).

(d) The principal amount of the Demand Notes to be issued on such exercise or conversion will be determined by the Company (with written notice thereof to the Warrant Agent) in accordance with Section 5(c). The Warrant Agent shall have no duty or obligation to investigate or confirm whether the Company’s determination of the principal amount of the Demand Notes to be issued on such exercise or conversion is accurate or correct, nor shall the Warrant Agent have any duty or obligation to take any action with regard to such Warrant exercise or conversion prior to being notified by the Company of the relevant principal amount of the Demand Notes to be issued.

(e) Except as otherwise provided herein, any exercise or conversion of a Warrant pursuant to the terms of this Agreement shall be irrevocable and shall constitute a binding agreement between the Holder and the Company, enforceable in accordance with its terms.

(f) Upon receipt of a Warrant Exercise Notice pursuant to Section 5(c), the Warrant Agent shall:

(i) examine such Warrant Exercise Notice and all other documents delivered to it by or on behalf of the Holder as contemplated hereunder to ascertain whether, on their face, such Warrant Exercise Notice and any such other documents have been executed and completed in accordance with their terms;

(ii) endeavor to inform the Company of and cooperate with and assist the Company in resolving any inconsistencies between the Warrant Exercise Notice received and delivery of Warrants to the Warrant Agent’s account;

(iii) advise the Company, no later than the Business Day after receipt of such Warrant Exercise Notice, of (a) the receipt of such Warrant Exercise Notice and, subject to Company’s approval, the number of Warrants to be exercised or converted in accordance with the terms of this Agreement, (b) the instructions with respect to delivery of the Demand Notes deliverable upon such exercise or conversion, subject to the timely receipt from the Depository of the necessary information, and (c) such other information as the Company shall reasonably require; and

(iv) in the case of Warrants represented by a Global Warrant Certificate, liaise with the Depository and effect such delivery to the relevant accounts at the Depository in accordance with its requirements, if requested by the Company with the delivery of the Demand Notes and all other necessary information by or on behalf of the Company for delivery to the Depository.

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(g) All questions as to the validity, form and sufficiency (including time of receipt) of a Warrant exercise or conversion shall be determined by the Company in its sole discretion in good faith, which determination shall be final and binding. The Company reserves the right to reject any and all Warrant Exercise Notices that it determines are not in proper form or for which any corresponding agreement by the Company to exchange would, in the opinion of the Company, be unlawful as determined in good faith. Such determination by the Company shall be final and binding on the Holders absent manifest error. Moreover, the Company reserves the absolute right to waive any of the conditions to the exercise or conversion of Warrants or defects in Warrant Exercise Notices with regard to any particular exercise or conversion of Warrants. Neither the Company nor the Warrant Agent shall be under any duty to give notice to the Holders of any irregularities in any exercise or conversion of Warrants, nor shall they incur any liability for the failure to give such notice.

(h) As soon as reasonably practicable after the exercise or conversion of any Warrant (and in any event not later than five (5) Business Days thereafter), the Company shall issue, or otherwise deliver, in authorized denominations to or upon the order of the Holder, either: (A) if such Holder holds the Warrants being exercised or converted through the Depository’s book-entry transfer facilities, by same-day or next-day credit to the Depository for the account of such Holder or for the account of a participant in the Depository the Demand Notes to which such Holder is entitled, in each case registered in such name and delivered to such account as directed in the Warrant Exercise Notice by such Holder or by the direct participant in the Depository through which such Holder is acting (or, if the Demand Notes may not then be held in book-entry form through the facilities of the Depository, as set forth in clause (B)); (B) if such Holder holds the Warrants being exercised or converted in the form of Individual Warrant Certificates, a book-entry interest in the Demand Notes to which such Holder is entitled on the books of the Company’s transfer agent or, at the Company’s option, by delivery to the address designated by such Holder in its Warrant Exercise Notice of a physical certificate or certificates representing the Demand Notes to which such Holder is entitled, in fully registered form, registered in such name or names as may be directed by such Holder (or, if the Warrants at the time of such exercise are held through the facilities of the Depository, as set forth in the foregoing clause (A)); or (C) if such Holder holds the Warrants being exercised or converted in the form of Direct Registration Warrants, a book-entry interest in the Demand Notes to which such Holder is entitled on the books and records of the Company’s transfer agent (or, if the Warrants at the time of such exercise are held through the facilities of the Depository, as set forth in the foregoing clause (A)).

If fewer than all of the Warrants evidenced by a Global Warrant Certificate surrendered upon the exercise or conversion of Warrants are exercised or converted at any time prior to the Expiration Date, the Warrant Agent shall cause a notation to be made to the records maintained by the Depository. The Person in whose name any certificate or certificates, or any Warrant Exercise Notice, for the Demand Notes are to be issued (or such Demand Notes are to be registered, in the case of a book-entry transfer) upon exercise or conversion of a Warrant shall be deemed to have become the Holder of record of such Demand Notes on the date such Warrant Exercise Notice is delivered.

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(i) If all of the Warrants evidenced by a Warrant Certificate have been exercised or converted, such Warrant Certificate shall be cancelled by the Warrant Agent. Such cancelled Warrant Certificate shall then be disposed of by or at the direction of the Company in accordance with Applicable Law. The Warrant Agent shall confirm such information to the Company in writing as promptly as practicable.

(j) The Company shall pay all expenses in connection with, and all transfer taxes and similar governmental charges that may be imposed with respect to, the issuance or delivery of the Demand Notes upon exercise or conversion of Warrants. The Warrant Agent shall not have any duty or obligation to take any action under any section of this Agreement that requires the payment of taxes and/or charges unless and until it is satisfied that all such payments have been made.

(k) The Warrant Agent shall keep copies of this Agreement and any notices given or received hereunder for a period beginning on the date of this Agreement and ending no earlier than the first (1st) anniversary of such date on which there are no outstanding Jones Act Common Stock Warrants or Warrants.

(l) Jones Act Limitations on Warrant Exercise. Notwithstanding any of the other provisions of this Agreement, in order to facilitate the Company’s compliance with the Jones Act and the Jones Act Restriction concerning the ownership and control of the capital stock of the Company by Non-U.S. Citizens with regard to its continuing ability to operate its vessels in the coastwise trade of the United States and to comply with obligations of the Company under contracts that it may enter into from time to time with United States Governmental Authorities:

(i) At the time of exercise or conversion of any Warrant, its Holder shall advise the Company whether or not it (or, if not the Holder, the Person that the Holder has designated to receive the Demand Notes issuable upon exercise or conversion of such Warrant) is a U.S. Citizen. The Company may require a Holder (or, if not the Holder, the Person that the Holder has designated to receive the Demand Notes issuable upon exercise or conversion of such Warrant) to provide it with such documents and other information as it may request as reasonable to confirm that the Holder (or, if not the Holder, the Person that the Holder has designated to receive the Demand Notes issuable upon exercise or conversion of such Warrant) is a U.S. Citizen.

(ii) Any Holder that cannot establish to the Company’s reasonable satisfaction that it (or, if not the Holder, the Person that the Holder has designated to receive the Demand Notes issuable upon exercise or conversion of any Warrant) is a U.S. Citizen may not exercise or convert any Warrant.

(iii) Any sale, transfer or other disposition of any Warrant by any Holder that is a Non-U.S. Citizen to a Person who is a U.S. Citizen must be a complete transfer of such Holder’s interests in such Warrant and the Demand Note issuable upon its exercise or conversion to such Person with the transferor retaining no ownership of the Warrant or underlying Demand Note nor any ability to direct or control such Person. The foregoing restriction shall also apply to any Person that the Holder has designated to receive any Demand Note issuable upon exercise or conversion of any Warrant.

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(iv) Notwithstanding anything (iv) herein to the contrary, in the event that either (A) the Jones Act and other applicable laws are repealed or amended so that the ownership and control of the Common Stock by Non-U.S. Citizens is no longer restricted in any way or (B) the Company’s Charter is amended so that the ownership and control of the Common Stock by Non-U.S. Citizens is no longer restricted in any way, the provisions of this Section 5(l) shall no longer apply to any Holder or Warrant.

(m) Cost Basis Information.

(i) In the event of a cash exercise of Warrants, the Company hereby instructs the Warrant Agent to record cost basis for the Demand Notes as reasonably determined by the Company prior to processing.

(ii) In the event of a conversion of Warrants, the Company shall provide the cost basis for Demand Notes issued pursuant to such conversion at the time the Company confirms the principal amount of the Demand Notes issuable in connection with such conversion to the Warrant Agent pursuant to Section 5 hereof.

(n) Optional Company Conversion.

(i) Right to Convert. If any Warrants become held by any Holder who is a U.S. Citizen (including by transfer of such Warrants to any Holder that is a U.S. Citizen), the Company shall have the right to convert any such Warrants into Demand Notes bearing a principal balance equal to the applicable Anti-Dilution Amounts, at the Company’s sole discretion. In order for the Company to determine whether any Holder is a U.S. Citizen (in its sole discretion), the Company may require a Holder to provide it with such documents and other information as it may request as reasonable to confirm that the Holder is a U.S. Citizen.

(ii) Mechanics of Conversion. In order for the Company to convert Warrants into Demand Notes pursuant to this Section 5(n), the Company shall deliver a written notice to each applicable Holder (such notice, a “Company Conversion Notice”) stating such Holder’s name and the principal amount of each Demand Note to be received by the Holder upon the conversion of such Holder’s Warrants. If required by the Company, such Holder shall surrender any Individual Warrant Certificates, if applicable, at the office of the Warrant Agent for the Warrants, and any Individual Warrant Certificates surrendered for conversion shall be endorsed or accompanied by a written instrument or instruments of transfer, in form reasonably satisfactory to the Company, duly executed by the Holder of record or his, her or its attorney duly authorized in writing.

(iii) Within five (5) Business Days of delivery of the Company Conversion Notice, the Company shall issue and deliver to the Holders of the Warrants that are being converted the Demand Notes.

(iv) The Company shall pay any and all issue and other similar taxes that may be payable in respect of any issuance or delivery of any Demand Note upon conversion of Warrants pursuant to this Section 5(n). The Company shall not, however, be required to pay any tax which may be payable in respect of any transfer involved in the issuance and delivery of any Demand Note in a name other than that in which the Warrants so converted were registered, and no such issuance or delivery shall be made unless and until the Person requesting such issuance has paid to the Company the amount of any such tax or has established, to the satisfaction of the Company, that such tax has been paid.

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(o) On each Warrant’s Expiration Date, such Warrant shall be deemed to be exercised in full by the Holder (without delivery of a Warrant Exercise Notice or any action by the Holder) to the extent that the Holder is a U.S. Citizen.

SECTION 6. Cancellation of Warrants. The Warrant Agent shall cancel all Warrant Certificates surrendered for exchange, substitution or transfer in whole or in part. Such cancelled Warrant Certificates shall thereafter be disposed of by the Warrant Agent upon written instructions from the Company reasonably satisfactory to the Warrant Agent and such Direct Registration Warrants shall be canceled by appropriate notation on the Warrant Register.

SECTION 7. Mutilated or Missing Warrant Certificates. Upon receipt by the Company and the Warrant Agent from any Holder of evidence reasonably satisfactory to them of the ownership of and the loss, theft, destruction or mutilation of such Holder’s Warrant Certificate and a surety bond or indemnity reasonably satisfactory to them and holding the Warrant Agent and Company harmless, and in case of mutilation upon surrender and cancellation thereof, and absent notice to Warrant Agent that such Warrant Certificates have been acquired by a bona fide purchaser, the Company will execute and the Warrant Agent will countersign and deliver in lieu thereof a new Warrant Certificate of like tenor and representing an identical interest in Warrants to such Holder; provided, that in the case of mutilation, no bond or indemnity shall be required if such Warrant Certificate in identifiable form is surrendered to the Company or the Warrant Agent for cancellation. Upon the issuance of any new Warrant Certificate under this Section 7, the Company may require the payment of a sum sufficient to cover any stamp tax or other governmental charge that may be imposed in relation thereto and any other expenses (including the reasonable fees and expenses of the Warrant Agent) in connection therewith. Every new Warrant Certificate executed and delivered pursuant to this Section 7 in lieu of any lost, stolen, destroyed or mutilated Warrant Certificate shall be entitled to the same benefits of this Agreement equally and proportionately with any and all other Warrant Certificates, whether or not the allegedly lost, stolen or destroyed Warrant Certificate shall be at any time enforceable by anyone. The provisions of this Section 7 are exclusive and shall preclude (to the extent lawful) all other rights or remedies with respect to the replacement of lost, stolen, destroyed or mutilated Warrant Certificates.

SECTION 8. Cash Sales and Liquidations. In the event of a Cash Sale or a Company Liquidation Event, the Company shall pay (or cause to be paid) to the Holders, with respect to each unexercised or unconverted Warrant outstanding immediately prior to the consummation of such Cash Sale or a Company Liquidation Event (the “Cash Closing”), cash in the amount equal to the aggregate principal amount of the underlying Demand Notes that such Holder is entitled to receive upon exercise of their Warrants (without regard to any limitations on exercise contained in this Agreement); provided, however, that no Holder shall be entitled to any payment hereunder with respect to any portion of such consideration that is contingent, deferred or escrowed unless and until such amounts are actually paid to the holders of the Common Stock. Upon the occurrence of a Cash Closing, all unexercised or unconverted Warrants outstanding immediately prior to the Cash Sale or a Company Liquidation Event shall automatically be terminated and cancelled and the Company shall thereupon cease to have any further obligations or liability with respect to the Warrants except as to the requirement to pay the aggregate principal amount of the underlying Demand Notes (subject to the limitations described in the prior sentence).

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SECTION 9. Legends. To the extent subject to restrictions on transfer under applicable securities laws, Warrant Certificates, if any, shall be stamped or otherwise imprinted with a legend, and the Warrant Statements shall include a restrictive notation with respect to such Warrants, in substantially the following form:

“THE WARRANTS REPRESENTED BY THIS CERTIFICATE (AND THE DEMAND NOTES ISSUABLE PURSUANT THERETO) HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE TRANSFERRED OR OTHERWISE DISPOSED OF UNLESS THEY HAVE BEEN REGISTERED UNDER THAT ACT OR AN EXEMPTION FROM REGISTRATION IS AVAILABLE.”

Any legend or restrictive notation referenced in this Section 9 shall be removed from the Warrant Certificates or Warrant Statements at any time after the restrictions described in such legend or restrictive notation cease to be applicable; provided that the Company may request from any Holder opinions, certificates or other evidence that such restrictions have ceased to be applicable before removing such legend or restrictive notation.

SECTION 10. Corporate Action. The Company shall not, and shall not permit or cause any of its subsidiaries to, take any action to avoid or seek to avoid the observance or performance of any of the terms to be observed or performed hereunder by the Company, including through any amendment of its Charter and by-laws (and any equivalent organizational documents of its subsidiaries) or any reorganization, transfer of assets, consolidation, merger, dissolution, issue or sale of securities.

SECTION 11. Warrant Agent. The Warrant Agent undertakes the duties and obligations expressly imposed by this Agreement upon the terms and conditions set forth in this Section 11.

(a) Limitation on Liability. The Warrant Agent shall not by countersigning Warrant Certificates or by any other act hereunder be accountable with respect to or be deemed to make any representations as to the validity or authorization of the Warrants or the Warrant Certificates (except as to its countersignature thereon), as to the validity, authorization or value (or kind or amount) of any Demand Notes or other property delivered or deliverable upon exercise or conversion of any Warrant. The Warrant Agent shall not (i) be liable for any recital or statement of fact contained herein or in the Warrant Certificates or for any action taken, suffered or omitted by the Warrant Agent in the belief that any Warrant Certificate or any other document or any signature is genuine or properly authorized unless such action or omission was taken or omitted to be taken in bad faith, gross negligence or willful misconduct (which bad faith, gross negligence or willful misconduct must be determined by a final, non-appealable judgment of a court of competent jurisdiction), (ii) be responsible for determining compliance by any Person with the provisions set forth in Section 5(l), (iii) be responsible for any failure on the part of the Company to issue, transfer or deliver any Demand Notes or property upon the surrender of any Warrant for

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the purpose of exercise or conversion or to comply with any other of the Company’s covenants and obligations contained in this Agreement or in the Warrant Certificates or (iv) be liable for any action taken, suffered or omitted to be taken in connection with this Agreement, except for its own bad faith, gross negligence or willful misconduct (which bad faith, gross negligence or willful misconduct must be determined by a final, non-appealable judgment of a court of competent jurisdiction) for which the Warrant Agent shall be liable. Notwithstanding anything in this Agreement to the contrary, in no event shall the Warrant Agent be liable for special, indirect, punitive, incidental or consequential loss or damage of any kind whatsoever (including but not limited to lost profits), even if the Warrant Agent has been advised of the likelihood of the loss or damage and regardless of the form of the action. Notwithstanding anything to the contrary stated herein, any liability of the Warrant Agent under this Agreement shall be limited to the amount of fees, but not including reimbursable expenses, paid by the Company to the Warrant Agent during the twelve (12) months immediately preceding the event for which recovery from the Warrant Agent is being sought.

(b) Instructions. The Warrant Agent is hereby authorized to accept advice or instructions with respect to the performance of its duties hereunder from an Appropriate Officer and to apply to any such officer for advice or instructions. The Warrant Agent shall be fully protected and authorized in relying upon the most recent advice or instructions received by any such officer. The Warrant Agent shall not be liable for any action taken, suffered or omitted by it in accordance with the advice or instructions of any such officer.

(c) Agents. The Warrant Agent may execute and exercise any of the rights and powers hereby vested in it or perform any duty hereunder either itself or by or through its attorneys, agents or employees, and the Warrant Agent shall not be answerable or accountable for any act, default, neglect or misconduct of any such attorneys, agents or employees or for any loss to the Company resulting from such neglect or misconduct, provided that the Warrant Agent acts without gross negligence, willful misconduct or bad faith (each as determined by a final judgment of a court of competent jurisdiction) in the selection and continued employment thereof. The Warrant Agent shall not be under any obligation or duty to institute, appear in, or defend any action, suit or legal proceeding in respect hereof, but this provision shall not affect the power of the Warrant Agent to take such action as the Warrant Agent may consider necessary in the performance of its duties hereunder. The Warrant Agent shall promptly notify the Company in writing of any claim made or action, suit or proceeding instituted against the Warrant Agent arising out of or in connection with this Agreement.

(d) Cooperation. The Company will perform, execute, acknowledge and deliver or cause to be performed, executed, acknowledged and delivered all such further acts, instruments and assurances as may reasonably be required by the Warrant Agent in order to enable the Warrant Agent to carry out or perform its duties under this Agreement.

(e) Agent Only. The Warrant Agent shall act solely as agent for the Company in accordance with the terms and conditions hereof and does not assume any obligation or relationship of agency or trust with any Holders. The Warrant Agent shall not be liable except for the performance of such duties as are expressly set forth herein, and no implied covenants or obligations shall be read into this Agreement against the Warrant Agent, whose duties and obligations shall be determined solely by the express provisions hereof.

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(f) Right to Counsel. The Warrant Agent may at any time consult with legal counsel satisfactory to it (who may be legal counsel for the Company), and the Warrant Agent shall incur no liability or responsibility to the Company or to any Holder for any action taken, suffered or omitted by the Warrant Agent in the absence of bad faith in accordance with the opinion or advice of such counsel.

(g) Compensation. The Company agrees to pay the Warrant Agent reasonable compensation for all services rendered by it hereunder in accordance with a mutually agreed upon fee schedule and to reimburse the Warrant Agent for its reasonable expenses incurred by the Warrant Agent hereunder (including reasonable counsel fees and expenses) in connection with the acceptance, negotiation, preparation, delivery, administration, execution, modification, waiver, delivery, enforcement or amendment of the Agreement and the exercise and performance of its duties hereunder.

(h) Accounting and Payment. The Warrant Agent shall account to the Company with respect to Warrants exercised or converted. The Warrant Agent shall advise the Company by electronic transmission at the end of each day the number of Warrant Exercise Notices received, and, if known, the identity of the Holder(s) of the Warrant(s) exercised or converted.

(i) No Conflict. Subject to Applicable Law, the Warrant Agent and any stockholder, affiliate, director, officer or employee of the Warrant Agent may buy, sell or deal in any of the Warrants or other securities (including, for the avoidance of doubt, bonds, notes and warrants) of the Company or become pecuniarily interested in any transaction in which the Company may be interested, or contract with or lend money to the Company or otherwise act as fully and freely as though it were not Warrant Agent under this Agreement. Subject to Applicable Law, nothing herein shall preclude the Warrant Agent from acting in any other capacity for the Company or for any other Person including, without limitation, acting as trustee under an indenture.

(j) Resignation; Termination. The Warrant Agent may resign its duties and be discharged from all further duties and liabilities hereunder (except liabilities arising prior to resignation as a result of the Warrant Agent’s bad faith, gross negligence or willful misconduct (which bad faith, gross negligence or willful misconduct must be determined by a final, non-appealable judgment of a court of competent jurisdiction)) after giving thirty (30) calendar days’ prior written notice to the Company. In the event the transfer agency relationship in effect between the Company and Warrant Agent terminates, the Warrant Agent shall be deemed to have resigned automatically and be discharged from its duties under this Agreement as of the effective date of such termination. The Company may remove the Warrant Agent upon thirty (30) calendar days’ written notice, and the Warrant Agent shall thereupon in like manner be discharged from all further duties and liabilities hereunder, except as have been caused by the Warrant Agent’s bad faith, gross negligence or willful misconduct (which bad faith, gross negligence or willful misconduct must be determined by a final, non-appealable judgment of a court of competent jurisdiction) prior to its removal. The Company shall cause to be mailed promptly (by first class mail, postage prepaid) to each registered Holder at such Holder’s last address as shown on the register of the Company,

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at the Company’s expense, a copy of such notice of resignation or notice of removal, as the case may be. Upon such resignation or removal the Company shall promptly appoint in writing a new warrant agent. If the Company shall fail to make such appointment within a period of thirty (30) calendar days after it has been notified in writing of such resignation by the resigning Warrant Agent or after such removal, then the Holder of any Warrant may apply to any court of competent jurisdiction for the appointment of a new warrant agent. Pending appointment of a successor to the Warrant Agent, either by the Company or by such a court, the duties of the Warrant Agent shall be carried out by the Company. Any successor warrant agent, whether appointed by the Company or by such a court, shall be a Person, formed under the laws of the United States or of any state thereof and authorized under such laws to conduct a shareholder services business, be subject to supervision and examination by a federal or state authority, and have a combined capital and surplus of not less than $50,000,000 as set forth in its most recent published annual report of condition; or in the case of such capital and surplus requirement, a controlled affiliate of such a Person meeting such capital and surplus requirement. After acceptance in writing of such appointment by the new Warrant Agent, such successor Warrant Agent shall be vested with the same powers, rights, duties and responsibilities under this Agreement as if it had been originally named herein as the Warrant Agent, without any further assurance, conveyance, act or deed; but if for any reason it shall be necessary or expedient to execute and deliver any further assurance, conveyance, act or deed, the same shall be done at the expense of the Company and shall be legally and validly executed and delivered by the resigning or removed Warrant Agent. Not later than the effective date of any such appointment, the Company shall send notice thereof to the resigning or removed Warrant Agent and shall forthwith cause a copy of such notice to be mailed (by first class, postage prepaid) to each registered Holder at such Holder’s last address as shown on the register of the Company. Failure to give any notice provided for in this Section 11(j), or any defect in any such notice, shall not affect the legality or validity of the resignation of the Warrant Agent or the appointment of a successor Warrant Agent, as the case may be.

(k) Merger, Consolidation or Change of Name of Warrant Agent. Any Person into which the Warrant Agent may be merged or converted or with which it may be consolidated, or any Person resulting from any merger, conversion or consolidation to which the Warrant Agent shall be a party, or any Person succeeding to all or substantially all of the agency business of the Warrant Agent shall be the successor to the Warrant Agent hereunder without the execution or filing of any document or any further act on the part of any of the parties hereto, provided that such Person would be eligible for appointment as a successor Warrant Agent under the provisions of Section 11(j). If at the time such successor to the Warrant Agent shall succeed under this Agreement, any of the Warrant Certificates shall have been countersigned but not delivered, any such successor to the Warrant Agent may adopt the countersignature of the original Warrant Agent; and if at that time any of the Warrant Certificates shall not have been countersigned, any successor to the Warrant Agent may countersign such Warrant Certificates either in the name of the predecessor Warrant Agent or in the name of the successor Warrant Agent; and in all such cases such Warrant Certificates shall have the full force and effect provided in the Warrant Certificates and in this Agreement. If at any time the name of the Warrant Agent shall be changed and at such time any of the Warrants shall have been countersigned but not delivered, the Warrant Agent whose name has changed may adopt the countersignature under its prior name; and if at that time any of the Warrants shall not have been countersigned, the Warrant Agent may countersign such Warrants either in its prior name or in its changed name; and in all such cases such Warrants shall have the full force and effect provided in the Warrants and in this Agreement.

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(l) Indemnity. The Company agrees to indemnify the Warrant Agent, and to hold it harmless against, any and all losses, damages, claims, liabilities, penalties, judgments, settlements, actions, suits, proceedings, litigation, investigations, costs or expenses (including reasonable counsel fees and expenses) incurred without the bad faith, gross negligence or willful misconduct on the part of the Warrant Agent (which bad faith, gross negligence or willful misconduct must be determined by a final, non-appealable order, judgment, decree or ruling of a court of competent jurisdiction), for any action taken, suffered or omitted by the Warrant Agent in connection with the preparation, delivery, acceptance, administration, execution and amendment of this Agreement and the exercise and performance of its duties hereunder, including the costs and expenses of defending against any claim of liability arising therefrom, directly or indirectly. The Warrant Agent shall not be obligated to expend or risk its own funds to take any action which it believes would expose it to expense or liability or to a risk of incurring expense of liability, unless it has been furnished with assurance of repayment or indemnity reasonably satisfactory to it.

(m) Exclusions. The Warrant Agent shall have no responsibility with respect to the validity of this Agreement or with respect to the validity or execution of any Warrant (except its countersignature thereof); nor shall it be responsible for any breach by the Company of any covenant or condition contained in this Agreement or in any Warrant; nor shall it be responsible or have any duty to make any calculation or adjustment, or to determine when any calculation or adjustment required under the provisions hereof should be made, how it should be made or what it should be, or have any responsibility or liability for the manner, method or amount of any such calculation or adjustment or the ascertaining of the existence of facts that would require any such calculation or adjustment.

(n) No Liability for Interest. The Warrant Agent shall not be under any liability for interest on any monies at any time received by it pursuant to any of the provisions of this Agreement.

(o) No Implied Obligations. The Warrant Agent shall be obligated to perform such duties as are explicitly set forth herein and no implied duties or obligations shall be read into this Agreement against the Warrant Agent. The Warrant Agent shall not be under any obligation to take any action hereunder that may involve it in any expense or liability, the payment of which within a reasonable time is not, in its reasonable opinion, assured to it. The Warrant Agent shall not be accountable or under any duty or responsibility for the use by the Company of any Warrant Certificate authenticated by the Warrant Agent and delivered by it to the Company pursuant to this Agreement or for the application by the Company of the proceeds of the issuance and sale, or exercise or conversion, of the Warrants or Demand Notes. The Warrant Agent shall have no duty or responsibility in case of any default by the Company in the performance of its covenants or agreements contained herein or in any Warrant Certificate or in the case of the receipt of any written demand from a Holder with respect to such default, including, without limiting the generality of the foregoing, any duty or responsibility to initiate or attempt to initiate any proceedings at law or otherwise or, to make any demand upon the Company.

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(p) Force Majeure. In no event shall the Warrant Agent be responsible or liable for any failure or delay in the performance of its obligations under this Agreement arising out of or caused by, directly or indirectly, forces beyond its reasonable control, including, without limitation, strikes, pandemics, epidemics, work stoppages, accidents, acts of war or terrorism, civil or military disturbances, nuclear or natural catastrophes or acts of God, and interruptions, loss or malfunctions of utilities, communications or computer (software or hardware) services.

(q) Bank Accounts. All funds received by the Warrant Agent under this Agreement that are to be distributed or applied by the Warrant Agent in the performance of services (the “Funds”) shall be held by Computershare as agent for the Company and deposited in one or more bank accounts to be maintained by Computershare in its name as agent for the Company. Until paid pursuant to the terms of this Agreement, Computershare will hold the Funds through such accounts in: deposit accounts of commercial banks with Tier 1 capital exceeding $1 billion or with an average rating above investment grade by S&P (LT Local Issuer Credit Rating), Moody’s (Long Term Rating) and Fitch Ratings, Inc. (LT Issuer Default Rating) (each as reported by Bloomberg Finance L.P.). The Warrant Agent shall have no responsibility or liability for any diminution of the Funds that may result from any deposit made by the Warrant Agent in accordance with this paragraph, including any losses resulting from a default by any bank, financial institution or other third party. The Warrant Agent may from time to time receive interest, dividends or other earnings in connection with such deposits. The Warrant Agent shall not be obligated to pay such interest, dividends or earnings to the Company, any Holder or any other party.

(r) Notice. The Warrant Agent shall not be required to take notice or be deemed to have notice of any event or condition hereunder unless the Warrant Agent shall be specifically notified in writing of such event or condition by the Company, and all notices or other instruments required by this Agreement to be delivered to the Warrant Agent must, in order to be effective, be received by the Warrant Agent as specified in Section 15, and in the absence of such notice so delivered, the Warrant Agent may conclusively assume no such event or condition exists.

(s) Signature Guarantee. The Warrant Agent may rely on and be fully authorized and protected in acting or failing to act upon (i) any Signature Guarantee or other comparable “signature guarantee program” or insurance program in addition to, or in substitution for, such Signature Guarantee; or (ii) related applicable law, act, regulation or any interpretation of the same.

(t) Survival. The provisions under this Section 11 shall survive the termination of this Agreement and the resignation, replacement or removal of the Warrant Agent. The costs and expenses incurred in enforcing this right of indemnification shall be paid by the Company.

SECTION 12. Severability. In the event that any one or more of the provisions contained herein or in the Warrants, or the application thereof in any circumstances, is held invalid, illegal or unenforceable (including as a result of applicable statutes and the related regulations issued by the U.S. Coast Guard or the Maritime Administration), the validity, legality and enforceability of any such provisions in every other respect and of the remaining provisions contained herein and therein shall not be affected or impaired thereby; provided, that if any such excluded term, provision, covenant or restriction shall materially adversely affect the rights, immunities, duties or obligations of the Warrant Agent, the Warrant Agent shall be entitled to resign immediately.

23

Furthermore, subject to the preceding sentence, in lieu of any such invalid, illegal or unenforceable provision, the parties hereto intend that there shall be added as a part of this Agreement a provision as similar in terms and commercial effect to such invalid, illegal or unenforceable provision as may be possible and be valid and enforceable which a reasonable person in the position of the Company, acting in good faith, would make, always keeping in mind the intent and purposes of this Agreement and the Warrants issued pursuant thereto by the Persons party hereto as of the date hereof.

SECTION 13. Notices to Company and Warrant Agent. All notices, requests or demands authorized by this Agreement to be given or made by the Warrant Agent or by any registered Holder of any Warrant to or on the Company to be effective shall be in writing (including by e-mail), and shall be deemed to have been duly given or made when delivered by hand or e-mail, or one (1) Business Day if sent by overnight courier service (with next day delivery specified), or two (2) Business Days after being delivered to a recognized courier (whose stated terms of delivery are two (2) Business Days or less to the destination such notice), or five (5) Business Days after being deposited in the mail, or, in the case of email notice, when received, addressed (until another address is filed in writing by the Company with the Warrant Agent) as follows:

Hornbeck Offshore Services, Inc.

103 Northpark Blvd., Suite 300

Covington, LA 70433

Any notice pursuant to this Agreement to be given by the Company or by any registered Holder of any Warrant to the Warrant Agent shall be sufficiently given if sent by overnight courier service or first-class mail, postage prepaid, addressed (until another address is filed in writing by the Warrant Agent with the Company), as follows:

Computershare, Inc.

Computershare Trust Company, N.A.

150 Royall Street

Canton, MA 02021

Unless the Warrant is represented by a Global Warrant Certificate, any notice or communication mailed to a Holder shall be mailed to the Holder at the Holder’s address as it appears on the Warrant Register and shall be sufficiently given if so mailed within the time prescribed. Any notice to the owners of a beneficial interest in a Warrant represented by a Global Warrant Certificate shall be distributed through the Depository in accordance with the procedures of the Depository. Communications to such Holder shall be deemed to be effective at the time of dispatch to the Depository. Failure to provide a notice or communication to a Holder or any defect in it shall not affect its sufficiency with respect to other Holders.

24

SECTION 14. Supplements and Amendments. The Company and the Warrant Agent may from time to time supplement, amend, waive or otherwise modify this Agreement (a) without the approval of any Holders to implement any changes required in order for the Company to comply with the limitations imposed by the Jones Act or other applicable law on ownership and control of the capital stock of the Company by Non-U.S. Citizens (provided that to the extent the Company makes any changes pursuant to this clause (a), the Company shall make only such changes which a reasonable person in the position of the Company, acting in good faith, would determine are necessary in order to implement such written requirements, always keeping in mind the intent and purposes of this Agreement and the Warrants issued pursuant thereto by the Persons party hereto as of the date hereof), or (b) with the prior written consent of (i) (A) Holders that hold Warrants representing at least seventy-five percent (75%) of the principal amount of the Demand Notes issuable pursuant to all outstanding Warrants and (B) Holders (as defined in the Jones Act Warrant Agreement) that hold Jones Act Common Stock Warrants representing at least seventy-five percent (75%) of the outstanding Jones Act Common Stock Warrants, which must include each of Ares, Whitebox and Highbridge, but only for so long as such Person (together with its respective Affiliates that hold Jones Act Common Stock Warrants) holds at least fifty percent (50%) of the Jones Act Common Stock Warrants issued to such Person (together with its respective Affiliates) on the date hereof and (ii) if any such amendment or supplement is disproportionately and materially adverse to any Holder(s) (each, an “Affected Holder”), Affected Holders that hold Warrants representing a majority of the principal amount of the Demand Notes issuable pursuant to all outstanding Warrants held by the Affected Holders; provided, that the Warrant Agent shall not be required to execute any amendment, supplement, waiver or other modification to this Agreement that the Warrant Agent has determined would adversely affect its own rights, duties, obligations or immunities under this Agreement. As a condition precedent to the Warrant Agent’s execution of any amendment, supplement, waiver or other modification to this Agreement, the Company shall deliver to the Warrant Agent a certificate from an Appropriate Officer that states that the proposed amendment, supplement, waiver or other modification is in compliance with the terms of this Section 16. No supplement, modification, amendment or waiver to this Agreement shall be effective unless duly executed by the Warrant Agent. Upon execution and delivery of any supplement, amendment, waiver or other modification pursuant to this Section 16, such amendment, supplement, waiver or other modification shall be considered a part of this Agreement for all purposes and every Holder of a Warrant Certificate theretofore or thereafter countersigned and delivered hereunder shall be bound thereby.

SECTION 15. Termination. This Agreement shall terminate on the date on which there are no outstanding Jones Act Common Stock Warrants or Warrants; provided, however, that the provisions of Sections 11, 13, 14, 15, 16, 17, 18 and 21 shall survive such termination.

SECTION 16. Governing Law and Consent to Forum. This Agreement shall be governed by and construed in accordance with the laws of the State of Delaware applicable to contracts made and to be performed within the State of Delaware. Each of the Company and the Warrant Agent hereby irrevocably submits to the jurisdiction of the Delaware Chancery Court; provided that if such court does not have jurisdiction, then the United States District Court for the District of

25

Delaware, with respect to any suit, action or proceeding arising out of or relating to this Agreement, and each irrevocably accepts for itself and in respect of its property, generally and unconditionally, the jurisdiction of the aforesaid courts. Nothing herein shall affect the right of any Person to serve process in any manner permitted by law or to commence legal proceedings or otherwise proceed against the Company in any other jurisdiction.

SECTION 17. Waiver of Jury Trial. Each of the parties to this Agreement hereby agrees to waive its respective rights to a jury trial of any claim or cause of action based upon or arising out of this Agreement. The scope of this waiver is intended to be all-encompassing of any and all disputes that may be filed in any court and that relate to the subject matter of this Agreement, including contract claims, tort claims and all other common law and statutory claims. Each party hereto acknowledges that this waiver is a material inducement to enter into this Agreement, that each has already relied on this waiver in entering into this Agreement and that each will continue to rely on this waiver in their related future dealings. Each party hereto further warrants and represents that it has reviewed this waiver with its legal counsel and that it knowingly and voluntarily waives its jury trial rights following consultation with legal counsel. THIS WAIVER IS IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING (OTHER THAN BY A MUTUAL WRITTEN WAIVER SPECIFICALLY REFERRING TO THIS SECTION 17 AND EXECUTED BY EACH OF THE PARTIES HERETO), AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT. In the event of litigation, this Agreement may be filed as a written consent to a trial by the court.

SECTION 18. Benefits of this Agreement. Nothing in this Agreement shall be construed to give to any Person other than the Company, the Warrant Agent and the registered Holders and beneficial owners (who are express third party beneficiaries of this Agreement) any legal or equitable right, remedy or claim under this Agreement, and this Agreement shall be for the sole and exclusive benefit of the Company, the Warrant Agent and the registered Holders and beneficial owners.

SECTION 19. Counterparts. This Agreement may be executed in any number of counterparts and each of such counterparts shall for all purposes be deemed to be an original, and such counterparts shall together constitute but one and the same instrument.

SECTION 20. Headings. The headings of sections of this Agreement have been inserted for convenience of reference only, are not to be considered a part hereof and in no way modify or restrict any of the terms or provisions hereof.

SECTION 21. Confidentiality. The Warrant Agent and the Company agree that all books, records, information and data pertaining to the business of the other party, including inter alia, personal, non-public warrant holder information, which are exchanged or received pursuant to the negotiation or the carrying out of this Agreement including the fees for services of the Warrant Agent shall remain confidential, and shall not be voluntarily disclosed to any other person, except as may be required by applicable law, rule or regulation, including, without limitation, pursuant to subpoenas from state or federal government authorities (e.g., in divorce and criminal actions). Each party may disclose relevant aspects of the other party’s confidential information to its officers,

26

affiliates, agents, subcontractors and employees to the extent reasonably necessary to perform its duties and obligations under this Agreement and such disclosure is not prohibited by applicable law; provided that such disclosing party shall (a) direct such officers, affiliates, agents, subcontractors and employees to treat such information confidentially and (b) be responsible for any breach of this Section 21 by such officers, affiliates, agents, subcontractors and employees who receive such information.

SECTION 22. Representations. Each party hereto (other than the Warrant Agent) represents and warrants that such party has been duly organized and is validly existing under the laws of the jurisdiction of its incorporation, and that this Agreement has been duly authorized, executed and delivered by such party and is enforceable against such party in accordance with its terms, except as may be limited by bankruptcy, insolvency, moratorium, reorganization and other similar laws affecting the enforcement of creditors’ rights generally.

SECTION 23. No Suspension. The right to exercise any Warrants shall not be suspended during any period.

SECTION 24. Entire Agreement. This Agreement, the Warrants and the Securityholders Agreement and any other agreements referenced herein or therein constitute the entire agreement with respect to the subject matter of this Agreement, and supersedes all prior agreements and understandings, both written and oral, between the parties with respect to the subject matter hereof.

SECTION 25. Tax Treatment. The Company intends to treat the Warrants as Demand Notes for U.S. federal income tax purposes unless otherwise required pursuant to applicable law.

[Signature pages follow]

27

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed and delivered as of the day and year first above written.

[Signature Page to Jones Act Anti-Dilution Warrant Agreement]

[Signature Page to Jones Act Anti-Dilution Warrant Agreement]

EXHIBIT A-1

FORM OF FACE OF GLOBAL JONES ACT ANTI-DILUTION WARRANT CERTIFICATE

This Global Warrant Certificate is deposited with or on behalf of The Depository Trust Company (the “Depository”) or its nominee in custody for the benefit of the beneficial owners hereof, and is not transferable to any person under any circumstances except that (i) this Global Warrant Certificate may be delivered to the Warrant Agent for cancellation pursuant to Section 4(g) of the Warrant Agreement and (ii) this Global Warrant Certificate may be transferred pursuant to Section 4(f) of the Warrant Agreement and as set forth below.

UNLESS THIS GLOBAL WARRANT CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TO THE COMPANY OR THE WARRANT AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO. OR SUCH OTHER ENTITY, HAS AN INTEREST HEREIN.

TRANSFERS OF THIS GLOBAL WARRANT CERTIFICATE SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF THE DEPOSITORY OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE OR AS OTHERWISE PERMITTED IN THE WARRANT AGREEMENT, AND TRANSFERS OF BENEFICIAL INTERESTS IN THIS GLOBAL WARRANT CERTIFICATE SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE WARRANT AGREEMENT.

NO AFFILIATE OF HORNBECK OFFSHORE SERVICES, INC. THAT OWNS THIS SECURITY (OR ANY INTEREST HEREIN) MAY SELL THIS SECURITY (OR ANY INTEREST HEREIN) IF UPON SUCH RESALE THIS SECURITY (OR SUCH INTEREST) WOULD CONSTITUTE A “RESTRICTED SECURITY” WITHIN THE MEANING OF RULE 144 UNDER THE SECURITIES ACT OF 1933, AS AMENDED.

No registration or transfer of the Demand Note issuable pursuant to the exercise or conversion of the Warrant will be recorded on the books of the Company until such provisions have been complied with.

To the extent that any provision hereof conflicts with any provision of the Warrant Agreement, the provision in the Warrant Agreement shall control.

A-1

CUSIP No. [•]

ISIN No. [•]

[•] WARRANTS TO PURCHASE

DEMAND NOTES EACH WITH PRINCIPAL AMOUNT OF $[•]

HORNBECK OFFSHORE SERVICES, INC.

GLOBAL WARRANT TO PURCHASE DEMAND NOTES

This Global Warrant Certificate (“Warrant Certificate”) certifies that Cede & Co., or its registered assigns is the registered holder of warrants (the “Warrants”) of Hornbeck Offshore Services, Inc., a Delaware corporation (the “Company”), to purchase a number of Demand Notes each in the principal amount of $[•] as set forth above (the “Demand Notes”). The Warrants expire at 5:00 p.m., New York City time, on the date on which no Warrants remain outstanding (such date, the “Expiration Date”), and each Warrant entitles the holder to purchase from the Company one Demand Note at the exercise price per Demand Note (the “Exercise Price”) in the principal amount set forth above, payable to the Company either by certified or official bank or bank cashier’s check payable to the order of the Company, or by wire transfer in immediately available funds of the aggregate Exercise Price to an account of the Warrant Agent specified in writing by the Warrant Agent for such purpose, no later than 5:00 p.m., New York City time, on the business day immediately prior to the settlement date, which settlement date is three Business Days after a Warrant Exercise Notice is delivered (the “Settlement Date”). The Exercise Price shall be determined in accordance with Section 5(b) of the Warrant Agreement.

The Warrants are subject to exercise and conversion, in whole or in part, as and to the extent provided in the Warrant Agreement.

To the extent that any provision hereof conflicts with any provision of the Warrant Agreement, the provision in the Warrant Agreement shall control.

No Warrant may be exercised or converted prior to the date of the Warrant Agreement or after the Expiration Date.

Jones Act Limitations on Warrant Exercise. The right to exercise or convert Warrants is subject to the limitations on ownership and control of the capital stock of the Company by Non-U.S. Citizens set forth in the Warrant Agreement.

REFERENCE IS HEREBY MADE TO THE FURTHER PROVISIONS OF THIS WARRANT CERTIFICATE SET FORTH ON THE REVERSE HEREOF. SUCH FURTHER PROVISIONS SHALL FOR ALL PURPOSES HAVE THE SAME EFFECT AS THOUGH FULLY SET FORTH AT THIS PLACE.

This Warrant Certificate shall not be valid unless countersigned by the Warrant Agent.

[signature page follows]

A-2

IN WITNESS WHEREOF, the Company has caused this Warrant Certificate to be executed by its duly authorized officer.

A-3

FORM OF REVERSE OF GLOBAL WARRANT CERTIFICATE

HORNBECK OFFSHORE SERVICES, INC.

The Warrants evidenced by this Warrant Certificate are a part of a duly authorized issue of Warrants to purchase Demand Notes issued pursuant to that certain Jones Act Anti-Dilution Warrant Agreement, dated as of September 4, 2020 (the “Warrant Agreement”), duly executed and delivered by the Company and Computershare, Inc. and its wholly owned subsidiary, Computershare Trust Company, N.A. (collectively, the “Warrant Agent”). The Warrant Agreement hereby is incorporated by reference in and made a part of this instrument and is hereby referred to for a description of the rights, limitation of rights, obligations, duties and immunities thereunder of the Warrant Agent, the Company and the holders (the words “holders” or “holder” meaning the registered holders or registered holder) of the Warrants. A copy of the Warrant Agreement may be inspected at the Warrant Agent’s office designated for such purpose and is available upon written request addressed to the Company. All capitalized terms used in this Warrant Certificate but not defined herein and are defined in the Warrant Agreement shall have the meanings assigned to them therein.

Warrants may be exercised to purchase the Demand Notes from the Company from the date of the Warrant Agreement through 5:00 p.m., New York City time, on the Expiration Date, at the Exercise Price set forth on the face hereof, subject to adjustment as described in the Warrant Agreement. Subject to the terms and conditions set forth herein and in the Warrant Agreement, the holder of the Warrants evidenced by this Warrant Certificate may exercise such Warrants as set forth in the Warrant Agreement. The Warrants are also subject to conversion, in whole or in part, at the sole discretion of the Company, as and to the extent provided in the Warrant Agreement. After 5:00 p.m., New York City time on the Expiration Date, unexercised or unconverted Warrants shall become wholly void and of no value.

Warrant Certificates, when surrendered by book-entry delivery through the facilities of the Depository, may be exchanged, in the manner and subject to the limitations provided in the Warrant Agreement, but without payment of any service charge, for another Warrant Certificate or Warrant Certificates of like tenor evidencing Warrants to purchase in the aggregate a like number of Demand Notes.

No Warrants may be sold, exchanged or otherwise transferred in violation of the Securities Act or state securities laws.

The Company and Warrant Agent may deem and treat the registered holder hereof as the absolute owner of this Warrant Certificate (notwithstanding any notation of ownership or other writing hereon made by anyone) for the purpose of any exercise or conversion hereof and for all other purposes.

[Balance of page intentionally remains blank]

A-4

[TO BE ATTACHED TO GLOBAL WARRANT CERTIFICATE FOR THE WARRANTS]

SCHEDULE OF INCREASES OR DECREASES IN GLOBAL WARRANT CERTIFICATE

The following increases or decreases in this Global Warrant Certificate have been made:

A-5

FORM OF ELECTION TO EXERCISE WARRANT FOR

WARRANT HOLDERS HOLDING WARRANTS

THROUGH THE DEPOSITORY TRUST COMPANY

TO BE COMPLETED BY DIRECT PARTICIPANT

IN THE DEPOSITORY TRUST COMPANY

HORNBECK OFFSHORE SERVICES, INC.

________ Warrants to Purchase ________ Demand Notes each with a principal amount of $________

(TO BE EXECUTED UPON EXERCISE OF THE WARRANT)

The undersigned hereby irrevocably elects to exercise the right, represented by Warrants to purchase Demand Notes of Hornbeck Offshore Services, Inc. (the “Company”) held for its benefit through the book-entry facilities of The Depository Trust Company (the “Depository”), to exercise ______ Warrants for the purchase of _____ newly issued Demand Notes each with a principal amount of _____ at the Exercise Price as determined in accordance with Section 5(b) of the Warrant Agreement.

The undersigned represents, warrants and promises that it has the full power and authority to exercise or convert and deliver the Warrants exercised or converted hereby. Unless the undersigned is making an election to convert the Warrants as set forth below, the undersigned represents, warrants and promises that it has delivered or will deliver in payment for such Demand Notes $_______by certified or official bank or bank cashier’s check payable to the order of the Company, or by wire transfer in immediately available funds of the aggregate Exercise Price to an account of the Warrant Agent specified in writing by the Warrant Agent for such purpose, no later than 5:00 p.m., New York City time, on the Business Day immediately prior to the Settlement Date.

If the undersigned will be receiving the Demand Notes issuable upon exercise of Warrants:

☐ Please check if the undersigned is a U.S. Citizen (additional information may be required by the Company to confirm that the undersigned is a U.S. Citizen)

☐ Please check if the undersigned is a Non-U.S. Citizen.

If the undersigned has designated another person (a “designee”) to receive the Demand Notes issuable upon exercise or conversion of Warrants:

☐ Please check if such designee is a U.S. Citizen (additional information may be required by the Company to confirm that such designee is a U.S. Citizen)

☐ Please check if such designee is a Non-U.S. Citizen.

A-6

The undersigned requests that the Demand Notes purchased hereby be in registered form in the authorized denominations, registered in such names and delivered, all as specified in accordance with the instructions set forth below.

NOTE: THIS EXERCISE NOTICE MUST BE DELIVERED TO THE WARRANT AGENT, PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON THE EXPIRATION DATE. THE WARRANT AGENT SHALL NOTIFY YOU (THROUGH THE CLEARING SYSTEM) OF (1) THE WARRANT AGENT’S ACCOUNT AT THE DEPOSITORY TO WHICH YOU MUST DELIVER YOUR WARRANTS ON THE EXERCISE DATE AND (2) THE ADDRESS, PHONE NUMBER AND ELECTRONIC MAILING ADDRESS WHERE YOU CAN CONTACT THE WARRANT AGENT AND TO WHICH WARRANT EXERCISE NOTICES ARE TO BE SUBMITTED.

WARRANT EXERCISE NOTICES WILL ONLY BE VALID IF DELIVERED IN ACCORDANCE WITH THE INSTRUCTIONS SET FORTH IN THIS NOTIFICATION (OR AS OTHERWISE DIRECTED), MARKED TO THE ATTENTION OF “WARRANT EXERCISE”.

WARRANT HOLDER EXERCISING THE WARRANTS, IF OTHER THAN THE DIRECT DTC PARTICIPANT DELIVERING THIS WARRANT EXERCISE NOTICE:

A-7

FILL IN FOR DELIVERY OF THE DEMAND NOTES IF OTHER THAN TO THE PERSON DELIVERING THIS WARRANT EXERCISE NOTICE:

Signatures must be guaranteed by a participant in a Medallion Signature Guarantee Program at a guarantee level acceptable to the Company’s transfer agent.

A-8

EXHIBIT A-2

FORM OF FACE OF INDIVIDUAL WARRANT CERTIFICATE

THIS WARRANT, AND THE DEMAND NOTES OF THE COMPANY WHICH MAY BE PURCHASED PURSUANT TO THE EXERCISE OF THIS WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE TRANSFERRED OR OTHERWISE DISPOSED OF UNLESS THEY HAVE BEEN REGISTERED UNDER THAT ACT OR AN EXEMPTION FROM REGISTRATION IS AVAILABLE.”

A-2-1

[•]

WARRANTS TO PURCHASE

DEMAND NOTES

HORNBECK OFFSHORE SERVICES, INC.

INDIVIDUAL WARRANT TO PURCHASE DEMAND NOTES

This Individual Warrant Certificate (“Warrant Certificate”) certifies that______________, or its registered assigns is the registered holder of Warrants (the “Warrants”) of Hornbeck Offshore Services, Inc., a Delaware corporation (the “Company”), to purchase a number of Demand Notes each in the principal amount of $[•] as set forth above (the “Demand Notes”). The Warrants expire at 5:00 p.m., New York City time, on the date on which no Warrants remain outstanding (such date, the “Expiration Date”), and each Warrant entitles the holder to purchase from the Company one Demand Note at the exercise price (the “Exercise Price”), payable to the Company either by certified or official bank or bank cashier’s check payable to the order of the Company, or by wire transfer in immediately available funds of the aggregate Exercise Price to an account of the Warrant Agent specified in writing by the Warrant Agent for such purpose, no later than 5:00 p.m., New York City time, on the Business Day immediately prior to the settlement date, which settlement date is three Business Days after a Warrant Exercise Notice is delivered (the “Settlement Date”). The Exercise Price shall be determined in accordance with Section 5(b) of the Warrant Agreement.

To the extent that any provision hereof conflicts with any provision of the Warrant Agreement, the provision in the Warrant Agreement shall control.

No Warrant may be exercised prior to the date of the Warrant Agreement or after the Expiration Date.

Jones Act Limitations on Warrant Exercise. The right to exercise or convert Warrants is subject to the limitations on ownership and control of the capital stock of the Company by Non-U.S. Citizens set forth in the Warrant Agreement.

REFERENCE IS HEREBY MADE TO THE FURTHER PROVISIONS OF THIS WARRANT

CERTIFICATE SET FORTH ON THE REVERSE HEREOF. SUCH FURTHER PROVISIONS SHALL FOR ALL PURPOSES HAVE THE SAME EFFECT AS THOUGH FULLY SET FORTH AT THIS PLACE.

This Warrant Certificate shall not be valid unless countersigned by the Warrant Agent.

[signature page follows]

A-2-2

IN WITNESS WHEREOF, the Company has caused this Warrant Certificate to be executed by its duly authorized officer.

A-2-3

FORM OF REVERSE OF INDIVIDUAL WARRANT CERTIFICATE

HORNBECK OFFSHORE SERVICES, INC.

The Warrants evidenced by this Warrant Certificate are a part of a duly authorized issue of Warrants to purchase Demand Notes issued pursuant to that certain Jones Act Anti-Dilution Warrant Agreement, dated as of September 4, 2020 (the “Warrant Agreement”), duly executed and delivered by the Company and Computershare, Inc. and its wholly owned subsidiary, Computershare Trust Company, N.A. (collectively, the “Warrant Agent”). The Warrant Agreement hereby is incorporated by reference in and made a part of this instrument and is hereby referred to for a description of the rights, limitation of rights, obligations, duties and immunities thereunder of the Warrant Agent, the Company and the holders (the words “holders” or “holder” meaning the registered holders or registered holder) of the Warrants. A copy of the Warrant Agreement may be inspected at the Warrant Agent’s office designated for such purpose and is available upon written request addressed to the Company. All capitalized terms used in this Warrant Certificate but not defined herein and are defined in the Warrant Agreement shall have the meanings assigned to them therein.

Warrants may be exercised to purchase Demand Notes from the Company from the date of the Warrant Agreement through 5:00 p.m., New York City time, on the Expiration Date, at the Exercise Price set forth on the face hereof. Subject to the terms and conditions set forth herein and in the Warrant Agreement, the holder of the Warrants evidenced by this Warrant Certificate may exercise such Warrants as set forth in the Warrant Agreement.

The Warrants are also subject to conversion, in whole or in part, at the sole discretion of the Company, as and to the extent provided in the Warrant Agreement.

In the event that upon any exercise of the Warrants evidenced hereby the number of Demand Notes actually purchased shall be less than the total number of Demand Notes purchasable upon exercise or conversion of the Warrants evidenced hereby, there shall be issued to the holder hereof, or such holder’s assignee, a new Warrant Certificate evidencing Warrants to purchase Demand Notes not so purchased. After 5:00 p.m., New York City time on the Expiration Date, unexercised or unconverted Warrants shall become wholly void and of no value.

Warrant Certificates, when surrendered to the Company, may be exchanged, in the manner and subject to the limitations provided in the Warrant Agreement, but without payment of any service charge, for another Warrant Certificate or Warrant Certificates of like tenor evidencing Warrants to purchase in the aggregate a like number of Demand Notes.

No Warrants may be sold, exchanged or otherwise transferred in violation of the Securities Act or state securities laws.

The Company and Warrant Agent may deem and treat the registered holder hereof as the absolute owner of this Warrant Certificate (notwithstanding any notation of ownership or other writing hereon made by anyone) for the purpose of any exercise or conversion hereof and for all other purposes.

[Balance of page intentionally remains blank]

A-2-4

FORM OF ELECTION TO EXERCISE WARRANT FOR

WARRANT HOLDERS HOLDING INDIVIDUAL WARRANT CERTIFICATES

TO BE COMPLETED BY REGISTERED HOLDER

HORNBECK OFFSHORE SERVICES, INC.

________ Warrants to Purchase ________ Demand Notes each with a principal amount of $________

(TO BE EXECUTED UPON EXERCISE OF THE WARRANT)

The undersigned hereby irrevocably elects to exercise the right, represented by ________ Warrants to purchase ___________ Demand Notes of Hornbeck Offshore Services, Inc. (the “Company”), each with a principal amount of ___________ at the Exercise Price as determined in accordance with Section 5(b) of the Warrant Agreement.

The undersigned represents, warrants and promises that it has the full power and authority to exercise or convert and deliver the Warrants exercised or converted hereby. Unless the undersigned is making an election to convert the Warrants as set forth below, the undersigned represents, warrants and promises that it has delivered or will deliver in payment for such Demand Notes $______________ by certified or official bank or bank cashier’s check payable to the order of the Company, or by wire transfer in immediately available funds of the aggregate Exercise Price to an account of the Warrant Agent specified in writing by the Warrant Agent for such purpose, no later than 5:00 p.m., New York City time, on the Business Day immediately prior to the Settlement Date.

If the undersigned will be receiving the Demand Notes issuable upon exercise or conversion of Warrants:

☐ Please check if the undersigned is a U.S. Citizen (additional information may be required by the Company to confirm that the undersigned is a U.S. Citizen)

☐ Please check if the undersigned is a Non-U.S. Citizen.

If the undersigned has designated another person (a “designee”) to receive the Demand Notes issuable upon exercise of Warrants:

☐ Please check if such designee is a U.S. Citizen (additional information may be required by the Company to confirm that such designee is a U.S. Citizen)

☐ Please check if such designee is a Non-U.S. Citizen.

The undersigned requests that the Demand Notes purchased hereby be in registered form in the authorized denominations, registered in such names and delivered, all as specified in accordance with the instructions set forth below, provided that if the Demand Notes are evidenced by global securities, the Demand Notes shall be registered in the name of the Depository or its nominee.

A-2-5

Dated:                                                                                                                                                                                                                

NOTE: THIS EXERCISE NOTICE MUST BE DELIVERED TO THE WARRANT AGENT, PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON THE EXPIRATION DATE. THE WARRANT AGENT SHALL NOTIFY YOU OF THE ADDRESS, PHONE NUMBER AND ELECTRONIC MAILING ADDRESS WHERE YOU CAN CONTACT THE WARRANT AGENT AND TO WHICH WARRANT EXERCISE NOTICES ARE TO BE SUBMITTED.

NAME OF REGISTERED HOLDER:                                                                                                                                                                                           

(PLEASE PRINT)

ADDRESS:                                                                                                                                                                                                                                      

DELIVERY ADDRESS (IF DIFFERENT):                                                                                                                                                                                  

ACCOUNT TO WHICH THE DEMAND NOTES ARE TO BE CREDITED:            

FILL IN FOR DELIVERY OF THE DEMAND NOTES IF OTHER THAN TO THE PERSON DELIVERING THIS WARRANT EXERCISE NOTICE:

NAME:                                                                                                                                                                                                                                              

ADDRESS:                                                                                                                                                                                                                                     

CONTACT NAME:                                                                                                                                                                                                                         

TELEPHONE (INCLUDING INTERNATIONAL CODE):                                                                                                                       

E-MAIL:                                                                                                   

SOCIAL SECURITY OR OTHER TAXPAYER IDENTIFICATION NUMBER (IF APPLICABLE):                    

NUMBER WARRANTS BEING EXERCISED:                

NUMBER OF DEMAND FOR WHICH THE WARRANTS ARE BEING EXERCISED:                

PRINCIPAL AMOUNT OF EACH DEMAND NOTE BEING EXERCISED                    

A-2-6

Note: If the Demand Notes are to be registered in a name other than that in which the Warrants represented by Individual Warrant Certificate(s) are registered, the signature of the holder hereof must be guaranteed.

Signature Guaranteed

Signatures must be guaranteed by a participant in a Medallion Signature Guarantee Program at a guarantee level acceptable to the Company’s transfer agent.

A-2-7

EXHIBIT A-3

FORM OF ELECTION TO EXERCISE WARRANT FOR

HOLDERS OF DIRECT REGISTRATION WARRANTS

TO BE COMPLETED BY REGISTERED HOLDER

HORNBECK OFFSHORE SERVICES, INC.

________ Warrants to Purchase ___________ Demand Notes each with a principal amount of $________

(TO BE EXECUTED UPON EXERCISE OF THE WARRANT)

The undersigned hereby irrevocably elects to exercise the right, represented by ________ Warrants to purchase ________ Demand Notes of Hornbeck Offshore Services, Inc. (the “Company”), each with a principal amount of _____, at the Exercise Price as determined in accordance with Section 5(b) of the Warrant Agreement.

The undersigned represents, warrants and promises that it has the full power and authority to exercise or convert and deliver the Warrants exercised or converted hereby. Unless the undersigned is making an election to convert the Warrants as set forth below, the undersigned represents, warrants and promises that it has delivered or will deliver in payment for such Demand Notes $____________ by certified or official bank or bank cashier’s check payable to the order of the Company, or by wire transfer in immediately available funds of the aggregate Exercise Price to an account of the Warrant Agent specified in writing by the Warrant Agent for such purpose, no later than 5:00 p.m., New York City time, on the Business Day immediately prior to the Settlement Date.

If the undersigned will be receiving the Demand Notes issuable upon exercise or conversion of Warrants:

☐ Please check if the undersigned is a U.S. Citizen (additional information may be required by the Company to confirm that the undersigned is a U.S. Citizen)

☐ Please check if the undersigned is a Non-U.S. Citizen.

If the undersigned has designated another person (a “designee”) to receive the Demand Notes issuable upon exercise or conversion of Warrants:

☐ Please check if such designee is a U.S. Citizen (additional information may be required by the Company to confirm that such designee is a U.S. Citizen)

☐ Please check if such designee is a Non-U.S. Citizen.

The undersigned requests that the Demand Notes purchased hereby be in registered form in the authorized denominations, registered in such names and delivered, all as specified in accordance with the instructions set forth below, provided that if the Demand Notes are evidenced by global securities, the Demand Notes shall be registered in the name of the Depository or its nominee.

A-3-1

Dated:                                                                                                                                                                                                                                               

NOTE: THIS EXERCISE NOTICE MUST BE DELIVERED TO THE WARRANT AGENT, PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON THE EXPIRATION DATE. THE WARRANT AGENT SHALL NOTIFY YOU OF THE ADDRESS, PHONE NUMBER AND ELECTRONIC MAILING ADDRESS WHERE YOU CAN CONTACT THE WARRANT AGENT AND TO WHICH WARRANT EXERCISE NOTICES ARE TO BE SUBMITTED.

NAME OF REGISTERED HOLDER:                                                                                                                                                                                          

(PLEASE PRINT)

ADDRESS:                                                                                                                                                                                                                                      

CONTACT NAME:                                                                                                                                                                                                                        

ADDRESS:                                                                                                                                                                                                                                     

TELEPHONE (INCLUDING INTERNATIONAL CODE):                                                                                                                                                        

E-MAIL:                                                                                                               

SOCIAL SECURITY OR OTHER TAXPAYER IDENTIFICATION NUMBER (IF APPLICABLE):                                                                                      

ACCOUNT FROM WHICH THE WARRANTS ARE BEING DELIVERED:                 

WARRANT EXERCISE NOTICES WILL ONLY BE VALID IF DELIVERED IN ACCORDANCE WITH THE INSTRUCTIONS SET FORTH IN THIS NOTIFICATION (OR AS OTHERWISE DIRECTED), MARKED TO THE ATTENTION OF “WARRANT EXERCISE”. WARRANT HOLDER DELIVERING THE WARRANTS:

ACCOUNT TO WHICH THE DEMAND NOTES ARE TO BE CREDITED:

DEPOSITORY ACCOUNT NO.:                                                                                                                                                   

FILL IN FOR DELIVERY OF THE DEMAND NOTES IF OTHER THAN TO THE PERSON DELIVERING THIS WARRANT EXERCISE NOTICE:

NAME:                                                                                                                                                                                                                                              

  (PLEASE PRINT)

A-3-2

ADDRESS:                                                                                                                                                                                                                                      

CONTACT NAME:                                                                                                                                                                                                                         

TELEPHONE (INCLUDING INTERNATIONAL CODE):                                                                                                                                                        

E-MAIL:                                                                                               

SOCIAL SECURITY OR OTHER TAXPAYER IDENTIFICATION NUMBER (IF APPLICABLE):                                                                                     

NUMBER WARRANTS BEING EXERCISED:                    

NUMBER OF DEMAND NOTES FOR WHICH THE WARRANTS ARE BEING EXERCISED:                    

PRINCIPAL AMOUNT OF EACH DEMAND NOTE BEING EXERCISED                    

Signatures must be guaranteed by a participant in a Medallion Signature Guarantee Program at a guarantee level acceptable to the Company’s transfer agent.

A-3-3

EXHIBIT B

FORM OF ASSIGNMENT

(TO BE EXECUTED BY THE REGISTERED HOLDER

IF SUCH HOLDER DESIRES TO TRANSFER A WARRANT)

FOR VALUE RECEIVED, the undersigned registered holder hereby sells, assigns and transfers unto

Name of Assignee

Address of Assignee

Warrants to purchase _________ Demand Notes each with a principal amount of $_________ held by the undersigned, together with all right, title and interest therein, and does irrevocably constitute and appoint attorney, to transfer such Warrants on the books of the Warrant Agent, with full power of substitution.

Social Security or Other Taxpayer Identification Number of Assignee

Signatures must be guaranteed by a participant in a Medallion Signature Guarantee Program at a guarantee level acceptable to the Company’s transfer agent.

B-1

EXHIBIT C

WARRANT SUMMARY

NUMBER OF WARRANTS: [•] Warrants, as described in the Jones Act Anti-Dilution Warrant Agreement dated as of September 4, 2020 between Hornbeck Offshore Services, Inc. (the “Company”) and Computershare, Inc. and its wholly owned subsidiary, Computershare Trust Company, N.A. (collectively, the “Warrant Agent”) (as supplemented or amended, the “Warrant Agreement”), each of which is exercisable for one Demand Note of the Company. This summary is not complete and reference is made to the Warrant Agreement for the terms of the Warrants. In the event of any conflict, the terms of the Warrant Agreement shall control.

EXERCISE PRICE: $0.00 per Demand Note.

PRINCIPAL AMOUNT: $[•] per Demand Note.

JONES ACT LIMITATIONS ON EXERCISE OR CONVERSION: The right to exercise or convert Warrants is subject to the limitations on ownership and control of the capital stock of the Company by Non-U.S. Citizens set forth in the Warrant Agreement.

SETTLEMENT:

Settlement: The Company shall deliver, against payment of the Exercise Price, a number of Demand Notes equal to the number of Warrants exercised.

DATES OF EXERCISE OR CONVERSION: At any time, and from time to time, prior to the close of business on the Expiration Date.

EXPIRATION DATE: The twenty-fifth (25^th) anniversary of the date that the Warrants are issued.

C-1

EXHIBIT D

FORM OF DEMAND NOTE

Attached.

D-1

THE DEMAND NOTE REPRESENTED BY THIS CERTIFICATE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE TRANSFERRED OR OTHERWISE DISPOSED OF UNLESS IT HAS BEEN REGISTERED UNDER THAT ACT OR AN EXEMPTION FROM REGISTRATION IS AVAILABLE.

NON-INTEREST BEARING DEMAND NOTE

OF

HORNBECK OFFSHORE SERVICES, INC.

FOR VALUE RECEIVED, THE UNDERSIGNED, Hornbeck Offshore Services, Inc. (the “Company”), HEREBY PROMISES TO PAY on demand to the order of [•], (the “Holder”), the principal sum of $[•] in lawful money of the United States of America by certified check or wire transfer of immediately available funds to an account specified in writing by the Holder. Reference is made to that certain Jones Act Anti-Dilution Warrant Agreement, dated as of September 4, 2020, between the Company and American Stock Transfer & Trust Company, LLC (as amended, supplemented or otherwise modified from time to time, the “Warrant Agreement”). Capitalized terms used herein but not otherwise defined shall have the meanings ascribed to them in the Warrant Agreement.

Interest shall not accrue in respect of this Demand Note. Neither this Demand Note nor any rights or obligations hereunder may be transferred or assigned at any time in whole or in part without the prior written consent of the Company. This Demand Note may only be amended or modified by written agreement signed by both the Company and the Holder.

The Company reserves the right to prepay the Demand Note in full or in part at any time without penalty or other set-aside, whereupon the principal amount or the applicable portion thereof of the Demand Note shall become immediately due and payable by certified check or wire transfer of immediately available funds to such account as the Holder shall specify in writing to the Company.

The Company hereby waives presentment and demand for payment, protest, notice of protest and non- payment, notice of dishonor or any other notice not expressly provided for herein, and agrees that Company’s liability in respect of this Demand Note shall not be affected by any extension in the time of payment hereof.

The Company agrees to pay all expenses, including collection costs and reasonable attorneys’ fees, in connection with the enforcement of this Demand Note.

This Demand Note is one of the Demand Notes referred to in the Warrant Agreement. This Demand Note is entitled to the benefits of the Warrant Agreement. THIS DEMAND NOTE SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE STATE OF DELAWARE. Each of the Company and the Holder irrevocably submits to the jurisdiction of the Delaware Chancery Court; provided that if such court does not have jurisdiction,

then the United States District Court for the District of Delaware, with respect to any suit, action or proceeding arising out of or relating to this Demand Note, and each irrevocably accepts for itself and in respect of its property, generally and unconditionally, the jurisdiction of the aforesaid courts. The Company and the Holder hereby agree to waive their respective rights to a jury trial of any claim or cause of action based upon or arising out of this Demand Note.

[Signature page follows]

IN WITNESS WHEREOF, the Company has caused this Demand Note to be executed by a duly authorized officer to evidence the Demand Note issued pursuant to the Warrant Agreement.

[Signature Page to Demand Note]