VOTING AND SUPPORT AGREEMENT (Form 8-K)

VOTING AND SUPPORT AGREEMENT

THIS VOTING AND SUPPORT AGREEMENT is dated as of June 15, 2026 (this "Agreement"), by and among each stockholder of Huntsman Corporation, a Delaware corporation ("Huntsman"), set forth on Exhibit A hereto (each, a "Holder" and collectively, the "Holders"), Olin Corporation, a Virginia corporation ("Olin"), Olympus Merger Sub, Inc., a Delaware corporation and a direct wholly owned subsidiary of Olin ("First Merger Sub"), and Hook Merger Sub LLC, a Delaware limited liability company and a direct wholly owned subsidiary of Olin ("Second Merger Sub" and, collectively with Olin and First Merger Sub, the "Olin Parties").

W I T N E S S E T H:

WHEREAS, Olin, Huntsman, First Merger Sub and Second Merger Sub are entering into an Agreement and Plan of Merger dated as of the date hereof (as the same may be amended or supplemented from time to time, the "Merger Agreement") providing for, among other things, a strategic business combination transaction, pursuant to which either (a) the merger of Huntsman with and into Olin, with Olin surviving (the "Direct Merger") or (b) (x) the merger of First Merger Sub with and into Huntsman (the "First Subsidiary Merger"), with Huntsman surviving as a direct wholly owned subsidiary of Olin, and (y) immediately following the First Subsidiary Merger, and as part of the same overall transaction as the First Subsidiary Merger, the Initial Surviving Company will be merged with and into Second Merger Sub (the "Second Subsidiary Merger" and, together with the First Subsidiary Merger, the "Subsidiary Mergers"), with Second Merger Sub surviving as a direct wholly owned subsidiary of Olin;

WHEREAS, as of the date hereof, each Holder Beneficially Owns (as defined below) such number of shares of Huntsman Common Stock set forth opposite such Holder's name on Exhibit A hereto (with respect to each Holder, such shares are referred to herein as such Holder's "Subject Shares");

WHEREAS, concurrently with the execution and delivery of the Merger Agreement, and as a condition and an inducement to the Olin Parties entering into the Merger Agreement, each Holder is entering into this Agreement with respect to its Subject Shares;

WHEREAS, each Holder delivers this Agreement to Huntsman and acknowledges that Huntsman, without being formally a party to this Agreement, shall be entitled to rely on such Holder's performance of its obligations under this Agreement; and

WHEREAS, the Olin Parties desire that each Holder agree, and each Holder is willing to agree, subject to the limitations herein, not to Transfer (as defined below) any of its Subject Shares (except as permitted in this Agreement), and to vote its Subject Shares that are outstanding as of the applicable record date in a manner so as to facilitate consummation of the Transactions.

NOW, THEREFORE, in consideration of the foregoing and the mutual covenants, representations, warranties and agreements contained herein, the receipt and sufficiency of which are hereby acknowledged, and intending to be legally bound hereby, the parties agree as follows:

Article I
GENERAL

1.1 Definitions. Capitalized terms used but not defined herein shall have the respective meanings set forth in the Merger Agreement.

"Beneficially Own" or "Beneficial Ownership" has the meaning assigned to such term in Rule 13d-3 under the Exchange Act, and a Person's beneficial ownership of securities shall be calculated in accordance with the provisions of such Rule (in each case, irrespective of whether or not such Rule is actually applicable in such circumstance). For the avoidance of doubt, Beneficially Own and Beneficial Ownership shall also include record ownership of securities.

"Beneficial Owner" means, in respect of a security, the Person(s) who Beneficially Own(s) such security.

"Group" has the meaning assigned to such term in Section 13(d)(3) of the Exchange Act and Regulation 13D-G thereunder.

"Immediate Family" means the spouse of an individual and the grandparents, parents, siblings and children (and children and spouses of any of the foregoing) of the individual or his or her spouse. An adopted child will be treated as a child of his or her adoptive parent or parents (but only if he or she was adopted before he or she reached 21 years of age).

"Permitted Transferee" means (1) any controlled Affiliate of such Holder which remains such, (2) a partner or member, active or retired, of such Holder or a stockholder of such Holder, (3) the estate of any such Holder or a trust established for the benefit of the descendants or any relatives or spouse of such Holder, (4) a parent corporation or wholly-owned subsidiary of such Holder or to a wholly-owned subsidiary of such parent unless and until such transferee ceases to be a parent or wholly-owned subsidiary of the Holder or a wholly-owned subsidiary of such parent, (5) a member of the Immediate Family of such Holder or (6) any Person in accordance with bona fide estate planning or estate administration purposes.

"Transfer" means, in respect of a Holder's Subject Shares, any direct or indirect: (1) offer, sale, lease, assignment, encumbrance, loan, pledge, gift, hedge, short sale, distribution, grant of a security interest, hypothecation, disposition or other similar transfer or disposal (including, for the avoidance of doubt, any deposit, submission or other tendering into any tender or exchange offer), change, limit or entry into or acquisition of any derivative arrangement, by operation of law or otherwise and whether voluntary or involuntary, (2) entry into any option, contract, agreement or other arrangement to do any of the foregoing in clause (1) and (3) entry into any swap or any other agreement, transaction or series of transactions that results in an amount of Subject Shares subject to Article III that is less than the amount of Subject Shares subject to Article III as of the date hereof (including, in the case of each of clauses (1), (2) and (3), through the Transfer of any Person or any interest in any Person).

Article II
AGREEMENT TO RETAIN SHARES

2.1 Transfer and Encumbrance of Shares.

(a) From the date hereof until the Termination Date (as defined below), each Holder shall not (i) Transfer any of its Subject Shares except as permitted by this Agreement, (ii) deposit any of its Subject Shares into a voting trust or enter into a voting agreement or arrangement with respect to any of its Subject Shares or grant any proxy (except as otherwise provided herein) or power of attorney with respect thereto or (iii) give instructions with respect to the voting of any of its Subject Shares in any manner that is inconsistent or otherwise take any other action with respect to any of its Subject Shares that would in any way restrict, limit or interfere with the performance by such Holder of its obligations hereunder or the transactions contemplated hereby.

(b) Notwithstanding anything in this Agreement to the contrary, each Holder may Transfer its Subject Shares:

(i) to one or more of its Affiliates or Permitted Transferees who, as a condition to the consummation of such Transfer, executes and delivers to Huntsman and Olin a written agreement, in form and substance reasonably acceptable to Olin, to assume such Holder's obligations hereunder and to be bound by the terms of this Agreement to the same extent as such Holder is bound hereunder and to make each of the representations and warranties hereunder in respect of the Subject Shares transferred as such Holder shall have made hereunder;

(ii) with the prior written consent of Olin; or

(iii) in connection with the satisfaction of the exercise price or a withholding tax liability incident to the vesting, exercise or settlement of any Huntsman Equity Awards.

2.2 Additional Purchases; Adjustments. Each Holder agrees that any shares of capital stock or other equity of Huntsman that such Holder purchases or otherwise acquires or with respect to which such Holder otherwise acquires voting power after the execution of this Agreement and prior to the Termination Date shall be subject to the terms and conditions of this Agreement to the same extent as if they constituted such Holder's Subject Shares as of the date hereof. Each Holder agrees that, in the event of any stock split, stock dividend, merger, reorganization, recapitalization, reclassification, combination, exchange of shares or the like of the capital stock of Huntsman affecting the Subject Shares, the terms of this Agreement shall apply to resulting securities that are Beneficially Owned by such Holder.

2.3 Unpermitted Transfers; Involuntary Transfers. Any Transfer or attempted Transfer of any Subject Shares in violation of this Article II shall, to the fullest extent permitted by Law, be null and void ab initio. If any involuntary Transfer of any of such Holder's Subject Shares shall occur, the transferee (which term, as used herein, shall include any and all transferees and subsequent transferees of the initial transferee) shall take and hold such Subject Shares subject to all of the restrictions, liabilities and rights under this Agreement, which shall continue in full force and effect until the Termination Date.

Article III
AGREEMENT TO VOTE

3.1 Agreement to Vote. Prior to the Termination Date, each Holder irrevocably and unconditionally agrees that it shall, at any meeting of the stockholders of Huntsman (whether annual or special and whether or not an adjourned or postponed meeting), however called, appear at such meeting or otherwise cause such Holder's Subject Shares that are outstanding as of the applicable record date and as to which such Holder has direct voting power to be counted as present thereat for purposes of establishing a quorum, and vote, or cause to be voted at such meeting, or, if any action is to be taken by written consent in lieu of a stockholder meeting, execute and deliver, or cause to be executed and delivered, a written consent with respect to, all such Subject Shares:

(a) in favor of (A) the adoption of the Merger Agreement and, without limiting the penultimate sentence of this Section 3.1, any amended and restated Merger Agreement or amendment to the Merger Agreement (the "Merger Proposal"), and approving any other matters necessary for the consummation of the transactions contemplated by the Merger Agreement, including the Direct Merger and the Subsidiary Mergers, and all other matters presented to stockholders of Huntsman by the Huntsman Board in connection with the Merger Agreement, and (B) any proposal to adjourn or postpone any such meeting of the stockholders of Huntsman to a later date if there are not sufficient votes to adopt the Merger Proposal; and

(b) against (A) any agreement, transaction or proposal that relates to a Huntsman Takeover Proposal or any other transaction, proposal, agreement or action made in opposition to adoption of the Merger Agreement or in competition or inconsistent with the Transactions or matters contemplated by the Merger Agreement; (B) any action or agreement that would result in a breach of any covenant, representation or warranty or any other obligation or agreement of Huntsman or any of its Subsidiaries contained in the Merger Agreement or of such Holder contained in this Agreement; (C) any action or agreement that would reasonably be expected to result in (1) any condition to the consummation of the Transactions set forth in Article VIII of the Merger Agreement not being fulfilled or (2) any change to the voting rights of any class of shares of capital stock of Huntsman (including any amendments to Huntsman's organizational documents); and (D) any other action that could reasonably be expected to impede, interfere with, materially delay, or materially and adversely affect the Transactions or this Agreement. Any attempt by such Holder to vote, consent or express dissent with respect to (or otherwise to utilize the voting power of) its Subject Shares over which such Holder has direct voting power in contravention of this Section 3.1 shall be null and void ab initio. If such Holder is the Beneficial Owner, but not the holder of record, of any of its Subject Shares, such Holder agrees to use reasonable best efforts to cause such holder of record and any nominees to vote (or exercise a consent with respect to) all of such Subject Shares in accordance with this Section 3.1.

Notwithstanding anything herein to the contrary in this Agreement, this Section 3.1 shall not require any Holder to be present (in person or by proxy) or vote (or cause to be voted) any of its Subject Shares to amend, modify or waive any provision of the Merger Agreement in a manner that reduces or has the effect of reducing the amount or changes the form of the Merger Consideration payable, imposes any material restrictions on or additional material conditions on the payment of the Merger Consideration, extends the Outside Date or otherwise adversely affects such Holder (in its capacity as a stockholder of Huntsman) in any material respect. Notwithstanding anything to the contrary in this Agreement, each Holder shall remain free to vote (or execute consents or proxies with respect to) its Subject Shares with respect to any matter other than as set forth in Section 3.1(a) and Section 3.1(b) in any manner such Holder deems appropriate, including in connection with the election of directors of Huntsman.

Article IV
ADDITIONAL AGREEMENTS

4.1 Further Assurances. Each Holder agrees that from and after the date hereof and until the Termination Date, such Holder shall and shall cause its controlled Affiliates to take no action that would reasonably be likely to adversely affect or delay the ability to perform its respective covenants and agreements under this Agreement.

4.2 Fiduciary Duties. Each Holder is entering into this Agreement solely in its capacity as the Beneficial Owner of its Subject Shares and nothing herein is intended to or shall limit or affect any actions taken by such Holder or any of such Holder's designees serving in his or her capacity as a director or officer of Huntsman (or a Subsidiary of Huntsman). The taking of any actions (or failures to act) by such Holder or such Holder's designees serving as a director of Huntsman (in such capacity as a director) shall not be deemed to constitute a breach of this Agreement.

Article V
REPRESENTATIONS AND WARRANTIES OF HOLDER

5.1 Representations and Warranties. Each Holder hereby represents and warrants to the Olin Parties as follows:

(a) Ownership. As of the date hereof, such Holder does not Beneficially Own any shares of capital stock or other equity of Huntsman, other than such Holder's Subject Shares listed opposite such Holder's name or otherwise disclosed on Exhibit A. Such Holder is the sole record and beneficial owner of all of such Holder's Subject Shares (other than shares as to which such Holder has disclaimed beneficial ownership as noted on Exhibit A), free and clear of all Liens of every nature whatsoever (including any restriction on the right to vote or otherwise Transfer such Subject Shares), except as provided under this Agreement, as noted on Exhibit A, or pursuant to any applicable restrictions on transfer under the Securities Act and, as to such Subject Shares that are subject to vesting or forfeiture, except as provided in the applicable benefit plans and award agreements of Huntsman.

(b) Power to Vote and Dispose of Shares. Such Holder has, with respect to its Subject Shares, power to vote, issue instructions with respect to the matters set forth in Article III, agree to all of the matters set forth in this Agreement, take all actions required under this Agreement and Transfer its Subject Shares. Other than this Agreement, other than with respect to the Group of which the Holder is part, and other than applicable benefit plans and award agreements of Huntsman with respect to its Subject Shares that are subject to vesting or forfeiture, (i) there are no agreements or arrangements of any kind, contingent or otherwise, to which such Holder is a party obligating such Holder to Transfer or cause to be Transferred to any Person any of its Subject Shares and (ii) no Person has any contractual or other right or obligation to purchase or otherwise acquire any of its Subject Shares.

(c) Organization; Authority. If such Holder is an entity, such Holder is duly organized, validly existing and in good standing under the Laws of its jurisdiction of formation. Such Holder has full power and authority and is duly authorized to make, enter into and carry out the terms of this Agreement and to perform its obligations hereunder. If such Holder is an individual, such Holder has all necessary legal capacity, power and authority to make, enter into and carry out the terms of this Agreement and to perform its obligations hereunder. This Agreement has been duly and validly executed and delivered by such Holder and (assuming due authorization, execution and delivery by each other party hereto), constitutes a valid and binding agreement of such Holder, enforceable against such Holder in accordance with its terms except to the extent that enforceability may be limited by the Bankruptcy and Equity Exception; and no other action is necessary to authorize the execution and delivery by such Holder or the performance of such Holder's obligations hereunder.

(d) No Violation. The execution, delivery and performance by such Holder of this Agreement will not (i) violate any provision of any Law applicable to such Holder or by which any of such Holder's Subject Shares are bound; (ii) violate any order, judgment or decree applicable to such Holder or any of its Affiliates or by which any of such Holder's Subject Shares are bound; or (iii) conflict with, or result in a breach or default under, any agreement or instrument to which such Holder or any of its Affiliates is a party or any term or condition of its certificate of formation, limited liability company agreement or comparable organizational documents, as applicable, except where such conflict, breach or default would not reasonably be expected to, individually or in the aggregate, prevent, impede or materially delay such Holder's ability to satisfy its obligations under this Agreement or to consummate the Transactions on a timely basis.

(e) Consents and Approvals. Neither the execution and delivery by such Holder of this Agreement, nor the performance of such Holder's obligations hereunder, require such Holder or any of its Affiliates to obtain any consent, approval, authorization or permit of, or to make any filing with or notification to, any Governmental Authority or other Person, except such filings and authorizations as may be required under the Exchange Act.

(f) Absence of Litigation. To the knowledge of such Holder, as of the date hereof, there is no Action pending against, or threatened in writing against, such Holder that would reasonably be expected, individually or in the aggregate, to prevent, impede or materially delay such Holder's ability to satisfy its obligations under this Agreement or to consummate the Transactions on a timely basis.

(g) Absence of Other Voting Agreements. None of the Subject Shares of such Holder is subject to any voting trust, proxy or other agreement, arrangement or restriction or other Lien with respect to voting, in each case, that is inconsistent with this Agreement. None of the Subject Shares of such Holder is subject to any pledge agreement pursuant to which such Holder does not retain voting rights with respect to its Subject Shares subject to such pledge agreement at least until the occurrence of an event of default under the related debt instrument.

Article VI
MISCELLANEOUS

6.1 No Solicitation. Each Holder, solely in its capacity as a stockholder of Huntsman, agrees that it will not, and will cause its controlled Affiliates not to, and will use reasonable best efforts to cause its and their Representatives not to, directly or indirectly, take any action that would violate Section 6.03 of the Merger Agreement as if such Holder were deemed to be Huntsman for purposes of Section 6.03 of the Merger Agreement. Notwithstanding the foregoing, in the event that Huntsman participates in discussions or negotiations with a Person regarding a Huntsman Takeover Proposal in accordance with Section 6.03 of the Merger Agreement, such Holder and/or any of its Representatives may engage in discussions or negotiations with such Person, provided that Huntsman remains at all times in full compliance with its obligations under Section 6.03 of the Merger Agreement.

6.2 Non-Recourse. This Agreement may only be enforced against, and any claim or cause of action based upon, arising out of, or related to this Agreement or the transactions contemplated by this Agreement may only be brought against, the individual and entities that are expressly named as parties hereto and then only with respect to the specific obligations set forth herein with respect to such party, provided that Huntsman, without being formally a party to this Agreement, shall be entitled to rely upon and enforce each Holder's obligations under this Agreement. Except to the extent a named party to this Agreement (and then only to the extent of the specific obligations undertaken by such named party in this Agreement and not otherwise), no past, present or future director, manager, officer, employee, incorporator, member, partner, equityholder, Affiliate, agent, attorney, advisor, consultant or Representative or Affiliate of any of the foregoing shall have any liability (whether in contract, tort, equity or otherwise) for any one or more of the representations, warranties, covenants, agreements or other obligations or liabilities of or made under this Agreement (whether for indemnification or otherwise) or of or for any claim based on, arising out of, or related to this Agreement or the transactions contemplated by this Agreement.

6.3 No Ownership Interest. Nothing contained in this Agreement shall be deemed to vest in Olin any direct or indirect ownership or incidence of ownership of or with respect to the Subject Shares. All rights, ownership and economic benefits of and relating to the Subject Shares shall remain vested in and belong to the applicable Holder, and Olin shall not have any authority to manage, direct, restrict, regulate, govern or administer any of the policies or operations of Huntsman or exercise any power or authority to direct any Holder in the voting or disposition of any Subject Shares, except as otherwise expressly provided herein.

6.4