BMAC Black Mountain Acquisition Corp

Exhibit 3.1

THIRD AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

OF

BLACK MOUNTAIN ACQUISITION CORP.

November 17, 2023

Black Mountain Acquisition Corp., a corporation organized and existing under the laws of the State of Delaware (the “Corporation”), DOES HEREBY CERTIFY AS FOLLOWS:

1. The name of the Corporation is “Black Mountain Acquisition Corp.” The original certificate of incorporation of the Corporation was filed with the Secretary of State of the State of Delaware on February 10, 2021. An amended and restated certificate of incorporation was filed with the Office of the Secretary of State of the State of Delaware on October 13, 2021. A second amended and restated certificate of incorporation was filed with the Office of the Secretary of State of the State of Delaware on April 17, 2023 (the “Second Amended and Restated Certificate”).

2. This Third Amended and Restated Certificate of Incorporation (the “Third Amended and Restated Certificate”), which both restates and amends the provisions of the Second Amended and Restated Certificate, was duly adopted in accordance with Sections 242 and 245 of the General Corporation Law of the State of Delaware, as amended from time to time (the “DGCL”), and by the affirmative vote of the holders of at least 50% of the stock entitled to vote at a meeting of the Corporation’s stockholders in accordance with Section 211 of the DGCL.

3. This Third Amended and Restated Certificate of Incorporation shall become effective on the date of filing with the Secretary of State of the State of Delaware.

4. The text of the Second Amended and Restated Certificate is hereby amended and restated in its entirety to read as follows:

ARTICLE I

NAME

The name of the corporation is Black Mountain Acquisition Corp. (the “Corporation”).

ARTICLE II

PURPOSE

The purpose of the Corporation is to engage in any lawful act or activity for which corporations may be organized under the DGCL. In addition to the powers and privileges conferred upon the Corporation by law and those incidental thereto, the Corporation shall possess and may exercise all the powers and privileges that are necessary or convenient to the conduct, promotion or attainment of the business or purposes of the Corporation, including, but not limited to, effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination, involving the Corporation and one or more businesses or entities (a “Business Combination”).

ARTICLE III

REGISTERED AGENT

The address of the Corporation’s registered office in the State of Delaware is: 850 New Burton Road, Suite 201, Dover, Kent County, Delaware 19904. The name of its registered agent at such address is: Cogency Global Inc.

ARTICLE IV

CAPITALIZATION

Section 4.1 Authorized Capital Stock. The total number of shares of all classes of capital stock, each with a par value of $0.0001 per share, which the Corporation is authorized to issue is 555,000,000 shares, consisting of (a) 550,000,000 shares of common stock, par value $0.0001 per share (the “Common Stock”), including (i) 500,000,000 shares of Class A Common Stock, par value $0.0001 per share (the “Class A Common Stock”), and (ii) 50,000,000 shares of Class B Common Stock, par value $0.0001 per share (the “Class B Common Stock”), and (b) 5,000,000 shares of preferred stock, par value $0.0001 per share (the “Preferred Stock”).

Section 4.2 Preferred Stock. Subject to Article IX of this Third Amended and Restated Certificate, the Board of Directors of the Corporation (the “Board”) is hereby expressly authorized to provide out of the unissued shares of the Preferred Stock for one or more series of Preferred Stock and to establish from time to time the number of shares to be included in each such series and to fix the voting rights, if any, designations, powers, preferences and relative, participating, optional, special and other rights, if any, of each such series and any qualifications, limitations and restrictions thereof, as shall be stated in the resolution or resolutions adopted by the Board providing for the issuance of such series and included in a certificate of designation (a “Preferred Stock Designation”) filed pursuant to the DGCL, and the Board is hereby expressly vested with the authority to the full extent provided by law, now or hereafter, to adopt any such resolution or resolutions.

Section 4.3 Common Stock.

(a) Voting.

(i) Except as otherwise required by law or this Third Amended and Restated Certificate (including any Preferred Stock Designation), the holders of the shares of Common Stock shall exclusively possess all voting power with respect to the Corporation.

(ii) Except as otherwise required by law or this Third Amended and Restated Certificate (including any Preferred Stock Designation), the holders of shares of Class A Common Stock and Class B Common Stock shall vote together as a single class and shall be entitled to one vote for each such share on each matter properly submitted to the stockholders on which the stockholders generally are entitled to vote.

(iii) Except as otherwise required by law or this Third Amended and Restated Certificate (including any Preferred Stock Designation), at any annual or special meeting of the stockholders, holders of the Class A Common Stock and holders of the Class B Common Stock, voting together as a single class, shall have the exclusive right to vote for the election of

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directors and on all other matters properly submitted to a vote of the stockholders. Notwithstanding the foregoing, except as otherwise required by law or this Third Amended and Restated Certificate (including any Preferred Stock Designation), holders of shares of any series of Common Stock shall not be entitled to vote on any amendment to this Third Amended and Restated Certificate (including any amendment to any Preferred Stock Designation) that relates solely to the terms of one or more outstanding series of Preferred Stock or other series of Common Stock if the holders of such affected series of Preferred Stock or Common Stock, as applicable, are entitled, either separately or together with the holders of one or more other such series, to vote thereon pursuant to this Third Amended and Restated Certificate (including any Preferred Stock Designation) or the DGCL.

(iv) The number of authorized shares of Class A Common Stock or Preferred Stock may be increased or decreased (but not below the number of shares thereof then outstanding) by the affirmative vote of the holders of a majority in voting power of the stock of the Corporation entitled to vote thereon irrespective of the provisions of Section 242(b)(2) of the DGCL (or any successor provision thereto), and no vote of the holders of any of the Class A Common Stock or the Preferred Stock voting separately as a class shall be required therefor, unless a vote of any such holder is required pursuant to this Third Amended and Restated Certificate (including any certificate of designation relating to any series of Preferred Stock). The holders of Class B Common Stock are entitled to vote as a separate class to increase the authorized number of Class B Common Stock.

(b) Class B Common Stock.

(i) Shares of Class B Common Stock are convertible into shares of Class A Common Stock on a one-for-one basis (the “Initial Conversion Ratio”) and shall automatically convert into Class A Common Stock at the time of the closing of the initial Business Combination, or at any time prior thereto at the option of the holder.

(ii) Notwithstanding the Initial Conversion Ratio, in the case that additional shares of Class A Common Stock or Equity-linked Securities (as defined below) are issued or deemed issued in excess of the amounts sold in the Corporation’s initial public offering of securities (the “Offering”) and related to the closing of the initial Business Combination, all issued and outstanding shares of Class B Common Stock shall automatically convert into shares of Class A Common Stock at the time of the closing of the initial Business Combination at a ratio for which:

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For purposes of this Third Amended and Restated Certificate, “Equity-linked Securities” shall mean any securities of the Corporation or any of the Corporation’s subsidiaries which are convertible into, or exchangeable or exercisable for, equity securities of the Corporation or such subsidiary, including any private placement of equity or debt.

Notwithstanding anything to the contrary contained herein, (A) the foregoing adjustment to the Initial Conversion Ratio may be waived as to any particular issuance or deemed issuance of additional shares of Class A Common Stock or Equity-linked Securities by the written consent or agreement of holders of a majority of the shares of Class B Common Stock then outstanding (without the necessity of calling, noticing or holding a meeting of holders of Class B Common Stock) and (B) in no event may the Class B Common Stock convert into Class A Common Stock at a ratio that is less than one-for-one.

The foregoing conversion ratio shall also be adjusted to account for any subdivision (by stock split, subdivision, exchange, stock dividend, reclassification, recapitalization or otherwise) or combination (by reverse stock split, exchange, reclassification, recapitalization or otherwise) or similar reclassification or recapitalization of the outstanding shares of Class A Common Stock into a greater or lesser number of shares occurring after the original filing of this Third Amended and Restated Certificate without a proportionate and corresponding subdivision, combination or similar reclassification or recapitalization of the outstanding shares of Class B Common Stock.

Each share of Class B Common Stock shall convert into its pro rata number of shares of Class A Common Stock pursuant to this Section 4.3(b). The pro rata share for each holder of Class B Common Stock will be determined as follows: Each share of Class B Common Stock shall convert into such number of shares of Class A Common Stock as is equal to the product of one multiplied by a fraction, the numerator of which shall be the total number of shares of Class A Common Stock into which all of the issued and outstanding shares of Class B Common Stock shall be converted pursuant to this Section 4.3(b) and the denominator of which shall be the total number of issued and outstanding shares of Class B Common Stock at the time of conversion.

(iii) Voting. Except as otherwise required by law or this Third Amended and Restated Certificate (including any Preferred Stock Designation), for so long as any shares of Class B Common Stock shall remain outstanding, the Corporation shall not, without the prior vote or written consent of the holders of a majority of the shares of Class B Common Stock then outstanding, voting separately as a single class, amend, alter or repeal any provision of this Third Amended and Restated Certificate, whether by merger, consolidation or otherwise, if such amendment, alteration or repeal would alter or change the powers, preferences or relative, participating, optional or other or special rights of the Class B Common Stock. Any action required or permitted to be taken at any meeting of the holders of Class B Common Stock may be taken without a meeting, without prior notice and without a vote, if a consent or consents in writing, setting forth the action so taken, shall be signed by the holders of the outstanding Class B Common Stock having not less than the minimum number of votes that would be necessary to authorize or take such action at a meeting at which all shares of Class B Common Stock were present and voted

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and shall be delivered to the Corporation by delivery to its registered office in the State of Delaware, its principal place of business, or an officer or agent of the Corporation having custody of the book in which minutes of proceedings of stockholders are recorded. Delivery made to the Corporation’s registered office shall be by hand or by certified or registered mail, return receipt requested. Prompt written notice of the taking of corporate action without a meeting by less than unanimous written consent of the holders of Class B Common Stock shall, to the extent required by law, be given to those holders of Class B Common Stock who have not consented in writing and who, if the action had been taken at a meeting, would have been entitled to notice of the meeting if the record date for notice of such meeting had been the date that written consents signed by a sufficient number of holders of Class B Common Stock to take the action were delivered to the Corporation.

(iv) Appointment and Removal of Directors. Notwithstanding any other provision in this Third Amended and Restated Certificate, prior to the closing of the initial Business Combination, the holders of Class B Common Stock shall have the exclusive right to elect, remove and replace any director, and the holders of Class A Common Stock shall have no right to vote on the election, removal or replacement of any director. This Section 4.3(b)(iv) may only be amended by a resolution passed at a meeting of the stockholders by a majority of holders of at least ninety percent (90%) of the outstanding Common Stock entitled to vote thereon.

(c) Dividends. Subject to applicable law, the rights, if any, of the holders of any outstanding series of the Preferred Stock and the provisions of Article IX hereof, the holders of the Common Stock shall be entitled to receive such dividends and other distributions (payable in cash, property or capital stock of the Corporation) when, as and if declared thereon by the Board from time to time out of any assets or funds of the Corporation legally available therefor, and shall share equally on a per share basis in such dividends and distributions.

(d) Liquidation, Dissolution or Winding Up of the Corporation. Subject to applicable law, the rights, if any, of the holders of any outstanding series of the Preferred Stock and the provisions of Article IX hereof, in the event of any voluntary or involuntary liquidation, dissolution or winding-up of the Corporation, after payment or provision for payment of the debts and other liabilities of the Corporation, the holders of the Common Stock shall be entitled to receive all the remaining assets of the Corporation available for distribution to its stockholders, ratably in proportion to the number of shares of the Common Stock held by them.

(e) Rights of Class B Common Stock. Notwithstanding anything to the contrary herein, the holders of Class B Common Stock (or any shares of Class A Common Stock issued upon conversion of such Class B Common Stock) shall not be entitled to any: (i) right, title, interest or claim of any kind in or to any monies held in the Trust Account (as defined below), including, but not limited to, upon a liquidation, dissolution or winding up of the Corporation, (ii) Redemption Rights (as defined below) in connection with the consummation of a Business Combination, or (iii) redemption rights in connection with a vote seeking to amend this Third Amended and Restated Certificate (A) to modify the substance or timing of the Corporation’s obligation to provide for the redemption of the Offering Shares (as defined below) as described in the Registration Statement (as defined below) or (B) with respect to any other material provisions relating to stockholders’ rights or pre-initial Business Combination activity (as described in Section 9.7).

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Section 4.4 Rights and Options. The Corporation has the authority to create and issue rights, warrants and options entitling the holders thereof to acquire from the Corporation any shares of its capital stock of any class or classes, with such rights, warrants and options to be evidenced by or in instrument(s) approved by the Board. The Board is empowered to set the exercise price, duration, times for exercise and other terms and conditions of such rights, warrants or options; provided, however, that the consideration to be received for any shares of capital stock issuable upon exercise thereof may not be less than the par value thereof.

ARTICLE V

BOARD OF DIRECTORS

Section 5.1 Board Powers. The business and affairs of the Corporation shall be managed by, or under the direction of, the Board. In addition to the powers and authority expressly conferred upon the Board by statute, this Third Amended and Restated Certificate or the Bylaws of the Corporation (the “Bylaws”), the Board is hereby empowered to exercise all such powers and do all such acts and things as may be exercised or done by the Corporation, subject, nevertheless, to the provisions of the DGCL, this Third Amended and Restated Certificate, and any Bylaws adopted by the stockholders; provided, however, that no Bylaws hereafter adopted by the stockholders shall invalidate any prior act of the Board that would have been valid if such Bylaws had not been adopted.

Section 5.2 Number, Election and Term.

(a) The number of directors of the Corporation shall be fixed from time to time in the manner provided in the Bylaws.

(b) Subject to Section 5.5 hereof, the Board shall be divided into three classes, as nearly equal in number as possible and designated Class I, Class II and Class III. The Board is authorized to assign members of the Board already in office to Class I, Class II or Class III. The term of the initial Class I Directors shall expire at the first annual meeting of the stockholders following the effectiveness of this Third Amended and Restated Certificate; the term of the initial Class II Directors shall expire at the second annual meeting of the stockholders following the effectiveness of this Third Amended and Restated Certificate; and the term of the initial Class III Directors shall expire at the third annual meeting of the stockholders following the effectiveness of this Third Amended and Restated Certificate. At each succeeding annual meeting of the stockholders, beginning with the first annual meeting of the stockholders following the effectiveness of this Third Amended and Restated Certificate, each of the successors elected to replace the class of directors whose term expires at that annual meeting shall be elected for a three (3) year term or until the election and qualification of their respective successors in office, subject to their earlier death, resignation or removal. Subject to Section 5.5 hereof, if the number of directors that constitutes the Board is changed, any increase or decrease shall be apportioned by the Board among the classes so as to maintain the number of directors in each class as nearly equal as possible, but in no case shall a decrease in the number of directors constituting the Board shorten the term of any incumbent director. Subject to Section 9.8 hereof, directors shall be elected by a plurality of the votes cast by the stockholders present in person or represented by proxy at the meeting and entitled to vote thereon. The Board is hereby expressly authorized, by resolution or resolutions thereof, to assign members of the Board already in office to the aforesaid classes at the time this Third Amended and Restated Certificate (and therefore such classification) becomes effective in accordance with the DGCL.

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(c) Subject to Section 5.5 hereof, a director shall hold office until the annual meeting for the year in which his or her term expires and until his or her successor has been elected and qualified, subject, however, to such director’s earlier death, resignation, retirement, disqualification or removal.

(d) Unless and except to the extent that the Bylaws shall so require, the election of directors need not be by written ballot. The holders of shares of Common Stock shall not have cumulative voting rights.

Section 5.3 Newly Created Directorships and Vacancies. Subject to Section 5.5 hereof, newly created directorships resulting from an increase in the number of directors and any vacancies on the Board resulting from death, resignation, retirement, disqualification, removal or other cause may be filled solely and exclusively by a majority vote of the remaining directors then in office, even if less than a quorum, or by a sole remaining director (and not by stockholders), and any director so chosen shall hold office for the remainder of the full term of the class of directors to which the new directorship was added or in which the vacancy occurred and until his or her successor has been elected and qualified, subject, however, to such director’s earlier death, resignation, retirement, disqualification or removal.

Section 5.4 Removal. Subject to Section 5.5 hereof, any or all of the directors may be removed from office at any time, but only for cause and only by the affirmative vote of holders of a majority of the voting power of all then outstanding shares of capital stock of the Corporation entitled to vote generally in the election of directors, voting together as a single class.

Section 5.5 Preferred Stock—Directors. Notwithstanding any other provision of this Article V, and except as otherwise required by law, whenever the holders of one or more series of the Preferred Stock shall have the right, voting separately by class or series, to elect one or more directors, the term of office, the filling of vacancies, the removal from office and other features of such directorships shall be governed by the terms of such series of the Preferred Stock as set forth in this Third Amended and Restated Certificate (including any Preferred Stock Designation) and such directors shall not be included in any of the classes created pursuant to this Article V unless expressly provided by such terms.

ARTICLE VI

BYLAWS

In furtherance and not in limitation of the powers conferred upon it by law, the Board shall have the power and is expressly authorized to adopt, amend, alter or repeal the Bylaws. The affirmative vote of a majority of the Board shall be required to adopt, amend, alter or repeal the Bylaws. The Bylaws also may be adopted, amended, altered or repealed by the stockholders; provided, however, that in addition to any vote of the holders of any class or series of capital stock of the Corporation required by law or by this Third Amended and Restated Certificate (including any Preferred Stock Designation), the affirmative vote of the holders of at least a majority of the voting power of all then outstanding shares of capital stock of the Corporation entitled to vote generally in the election of directors, voting together as a single class, shall be required for the stockholders to adopt, amend, alter or repeal the Bylaws; and provided further, however, that no Bylaws hereafter adopted by the stockholders shall invalidate any prior act of the Board that would have been valid if such Bylaws had not been adopted.

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ARTICLE VII

MEETINGS OF STOCKHOLDERS; ACTION BY WRITTEN CONSENT

Section 7.1 Meetings. Subject to the rights, if any, of the holders of any outstanding series of the Preferred Stock, and to the requirements of applicable law, special meetings of stockholders may be called only by the Chairman of the Board, Chief Executive Officer of the Corporation, or the Board pursuant to a resolution adopted by a majority of the members of the Board then in office, and the ability of the stockholders to call a special meeting is hereby specifically denied. Except as provided in the foregoing sentence, special meetings of stockholders may not be called by another person or persons.

Section 7.2 Advance Notice. Advance notice of stockholder nominations for the election of directors and of business to be brought by stockholders before any meeting of the stockholders shall be given in the manner provided in the Bylaws.

Section 7.3 Action by Written Consent. Except as may be otherwise provided for or fixed pursuant to this Third Amended and Restated Certificate (including any Preferred Stock Designation) relating to the rights of the holders of any outstanding series of Preferred Stock, subsequent to the consummation of the Offering, any action required or permitted to be taken by the stockholders must be effected by a duly called annual or special meeting of such stockholders and may not be effected by written consent of the stockholders, other than with respect to Class B Common Stock with respect to which action may be taken by written consent.

ARTICLE VIII

LIMITED LIABILITY; INDEMNIFICATION

Section 8.1 Limitation of Director Liability. A director of the Corporation shall not be personally liable to the Corporation or its stockholders for monetary damages for breach of fiduciary duty as a director, except to the extent such exemption from liability or limitation thereof is not permitted under the DGCL as the same exists or may hereafter be amended or unless he or she violated his or her duty of loyalty to the Corporation or its stockholders, acted in bad faith, knowingly or intentionally violated the law, authorized unlawful payments of dividends, unlawful stock purchases or unlawful redemptions, or derived improper personal benefit from his or her actions as a director. Any amendment, modification or repeal of the foregoing sentence shall not adversely affect any right or protection of a director of the Corporation hereunder in respect of any act or omission occurring prior to the time of such amendment, modification or repeal.

Section 8.2 Indemnification and Advancement of Expenses

(a) To the fullest extent permitted by applicable law, as the same exists or may hereafter be amended, but subject to Section 4.3(e) above, the Corporation shall indemnify and hold harmless each person who is or was made a party or is threatened to be made a party to or is otherwise involved in any threatened, pending or completed action, suit or proceeding, whether

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civil, criminal, administrative or investigative (a “proceeding”) by reason of the fact that he or she is or was a director or officer of the Corporation or, while a director or officer of the Corporation, is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation or of a partnership, joint venture, trust, other enterprise or nonprofit entity, including service with respect to an employee benefit plan (an “indemnitee”), whether the basis of such proceeding is alleged action in an official capacity as a director, officer, employee or agent, or in any other capacity while serving as a director, officer, employee or agent, against all liability and loss suffered and expenses (including, without limitation, attorneys’ fees, judgments, fines, ERISA excise taxes and penalties and amounts paid in settlement) reasonably incurred by such indemnitee in connection with such proceeding. The Corporation shall to the fullest extent not prohibited by applicable law pay the expenses (including attorneys’ fees) incurred by an indemnitee in defending or otherwise participating in any proceeding in advance of its final disposition; provided, however, that, to the extent required by applicable law, such payment of expenses in advance of the final disposition of the proceeding shall be made only upon receipt of an undertaking, by or on behalf of the indemnitee, to repay all amounts so advanced if it shall ultimately be determined that the indemnitee is not entitled to be indemnified under this Section 8.2 or otherwise. The rights to indemnification and advancement of expenses conferred by this Section 8.2 shall be contract rights and such rights shall continue as to an indemnitee who has ceased to be a director, officer, employee or agent and shall inure to the benefit of his or her heirs, executors and administrators. Notwithstanding the foregoing provisions of this Section 8.2(a), except for proceedings to enforce rights to indemnification and advancement of expenses, the Corporation shall indemnify and advance expenses to an indemnitee in connection with a proceeding (or part thereof) initiated by such indemnitee only if such proceeding (or part thereof) was authorized by the Board.

(b) The rights to indemnification and advancement of expenses conferred on any indemnitee by this Section 8.2 shall not be exclusive of any other rights that any indemnitee may have or hereafter acquire under law, this Third Amended and Restated Certificate, the Bylaws, an agreement, vote of stockholders or disinterested directors, or otherwise.

(c) Any repeal or amendment of this Section 8.2 by the stockholders or by changes in law, or the adoption of any other provision of this Third Amended and Restated Certificate inconsistent with this Section 8.2, shall, unless otherwise required by law, be prospective only (except to the extent such amendment or change in law permits the Corporation to provide broader indemnification rights on a retroactive basis than permitted prior thereto), and shall not in any way diminish or adversely affect any right or protection existing at the time of such repeal or amendment or adoption of such inconsistent provision in respect of any proceeding (regardless of when such proceeding is first threatened, commenced or completed) arising out of, or related to, any act or omission occurring prior to such repeal or amendment or adoption of such inconsistent provision.

(d) This Section 8.2 shall not limit the right of the Corporation, to the extent and in the manner authorized or permitted by law, to indemnify and to advance expenses to persons other than indemnitees.

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ARTICLE IX

BUSINESS COMBINATION REQUIREMENTS; EXISTENCE

Section 9.1 General.

(a) The provisions of this Article IX shall apply during the period commencing upon the effectiveness of this Third Amended and Restated Certificate and terminating upon the consummation of the Corporation’s initial Business Combination and no amendment to this Article IX shall be effective prior to the consummation of the initial Business Combination unless approved by the affirmative vote of the holders of at least fifty percent (50%) of all then outstanding shares of the Common Stock.

(b) Immediately after the Offering, a certain amount of the net offering proceeds received by the Corporation in the Offering (including the proceeds of any exercise of the underwriters’ over-allotment option) and certain other amounts specified in the Corporation’s registration statement on Form S-1 (File No. 333-259469), as initially filed with the U.S. Securities and Exchange Commission (the “SEC”) on September 10, 2021, as amended (the “Registration Statement”) and declared effective on October 13, 2021 by the U.S. Securities and Exchange Commission, was deposited in a trust account (the “Trust Account”), established for the benefit of the Public Stockholders (as defined below) pursuant to a trust agreement described in the Registration Statement. Except for the withdrawal of interest to pay taxes (less up to $100,000 of interest to pay dissolution expenses), none of the funds held in the Trust Account (including the interest earned on the funds held in the Trust Account) will be released from the Trust Account until the earliest to occur of (i) the completion of the initial Business Combination, (ii) the redemption of shares in connection with a vote seeking to amend any provisions of this Third Amended and Restated Certificate relating to stockholders’ rights or pre-initial Business Combination activity (as described in Section 9.7 hereof) or (iii) the redemption of 100% of the Offering Shares (as defined below) if the Corporation is unable to complete its initial Business Combination within 25 months from the closing of the Offering (or, if the Office of the Delaware Division of corporations shall not be open for business (including filing of corporate documents) on such date, the next date upon which the Office of the Delaware Division of Corporations shall be open) (the “Deadline Date”), which may be extended pursuant to Section 9.1(c) hereof. Holders of shares of the Common Stock included as part of the units sold in the Offering (the “Offering Shares”) (whether such Offering Shares were purchased in the Offering or in the secondary market following the Offering and whether or not such holders are either Black Mountain Sponsor LLC (the “Sponsor”) or officers or directors of the Corporation, or affiliates of any of the foregoing) are referred to herein as “Public Stockholders.”

(c) In the event that the Corporation has not consummated an initial Business Combination within 25 months from the closing of the Offering, the Board, in its discretion and without another stockholder vote, if requested by the Sponsor, upon five (5) days’ prior written notice to the Corporation, may elect to extend the Deadline Date by one month each time on up to six (6) occasions, for up to an additional six (6) months, but in no event to a date later than 31 months from the closing of the Offering (or, if the Office of the Delaware Division of Corporations shall not be open for business (including filing of corporate documents) on such date, the next date upon which the Office of the Delaware Division of Corporations shall be open).

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Section 9.2 Redemption Rights.

(a) Prior to the consummation of the initial Business Combination, the Corporation shall provide all holders of Offering Shares with the opportunity to have their Offering Shares redeemed upon the consummation of the initial Business Combination pursuant to, and subject to the limitations of, Section 9.2(b) and 9.2(c) hereof (such rights of such holders to have their Offering Shares redeemed pursuant to such Sections, the “Redemption Rights”) for cash equal to the applicable redemption price per share determined in accordance with Section 9.2(b) hereof (the “Redemption Price”). Notwithstanding anything to the contrary contained in this Third Amended and Restated Certificate, there shall be no Redemption Rights or liquidating distributions with respect to any warrant issued pursuant to the Offering.

(b) If the Corporation offers to redeem the Offering Shares other than in conjunction with a stockholder vote on an initial Business Combination with a proxy solicitation pursuant to Regulation 14A of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) (or any successor rules or regulations), and filing proxy materials with the SEC, the Corporation shall offer to redeem the Offering Shares upon the consummation of the initial Business Combination, subject to lawfully available funds therefor, in accordance with the provisions of Section 9.2(a) hereof pursuant to a tender offer in accordance with Rule 13e-4 and Regulation 14E of the Exchange Act (or any successor rule or regulation) (such rules and regulations hereinafter called the “Tender Offer Rules”) which it shall commence prior to the consummation of the initial Business Combination and shall file tender offer documents with the SEC prior to the consummation of the initial Business Combination that contain substantially the same financial and other information about the initial Business Combination and the Redemption Rights as is required under Regulation 14A of the Exchange Act (or any successor rule or regulation) (such rules and regulations hereinafter called the “Proxy Solicitation Rules”), even if such information is not required under the Tender Offer Rules; provided, however, that if a stockholder vote is required by law to approve the proposed initial Business Combination, or the Corporation decides to submit the proposed initial Business Combination to the stockholders for their approval for business or other legal reasons, the Corporation shall offer to redeem the Offering Shares, subject to lawfully available funds therefor, in accordance with the provisions of Section 9.2(a) hereof in conjunction with a proxy solicitation pursuant to the Proxy Solicitation Rules (and not the Tender Offer Rules) at a price per share equal to the Redemption Price calculated in accordance with the following provisions of this Section 9.2(b). In the event that the Corporation offers to redeem the Offering Shares pursuant to a tender offer in accordance with the Tender Offer Rules, the Redemption Price per share of the Common Stock payable to holders of the Offering Shares tendering their Offering Shares pursuant to such tender offer shall be equal to the quotient obtained by dividing: (i) the aggregate amount on deposit in the Trust Account as of two (2) business days prior to the consummation of the initial Business Combination, including interest earned on the funds held in the Trust Account and not previously released to the Corporation to pay its taxes, by (ii) the total number of then outstanding Offering Shares. If the Corporation offers to redeem the Offering Shares in conjunction with a stockholder vote on the proposed initial Business Combination pursuant to a proxy solicitation, the Redemption Price per share of the Common Stock payable to holders of the Offering Shares exercising their Redemption Rights (irrespective of whether they voted in favor of or against the Business Combination) shall be equal to the quotient obtained by dividing (A) the aggregate amount on deposit in the Trust Account as of two (2) business days prior to the consummation of the initial Business Combination, including interest earned on the funds held in the Trust Account and not previously released to the Corporation to pay its taxes, by (B) the total number of then outstanding Offering Shares.

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(c) If the Corporation offers to redeem the Offering Shares in conjunction with a stockholder vote on an initial Business Combination pursuant to a proxy solicitation, a Public Stockholder, together with any affiliate of such stockholder or any other person with whom such stockholder is acting in concert or as a “group” (as defined under Section 13(d)(3) of the Exchange Act), shall be restricted from seeking Redemption Rights with respect to more than an aggregate of twenty percent (20%) of the Offering Shares without the prior consent of the Corporation.

(d) In the event that the Corporation has not consummated an initial Business Combination by the Deadline Date, the Corporation shall (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but not more than ten (10) business days thereafter, subject to lawfully available funds therefor, redeem 100% of the Offering Shares in consideration of a per-share price, payable in cash, equal to the quotient obtained by dividing (A) the aggregate amount then on deposit in the Trust Account, including interest earned on the funds held in the Trust Account and not previously released to the Corporation to pay its taxes (less up to $100,000 of such net interest to pay dissolution expenses), by (B) the total number of then outstanding Offering Shares, which redemption will completely extinguish rights of the Public Stockholders (including the right to receive further liquidating distributions, if any), subject to applicable law, and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the remaining stockholders and the Board in accordance with applicable law, dissolve and liquidate, subject in the case of clauses (ii) and (iii) above to the Corporation’s obligations under the DGCL to provide for claims of creditors and other requirements of applicable law.

(e) If the Corporation offers to redeem the Offering Shares in conjunction with a stockholder vote on an initial Business Combination, the Corporation shall consummate the proposed initial Business Combination only if such initial Business Combination is approved by the affirmative vote of the holders of a majority of the shares of the Common Stock that are voted at a stockholder meeting held to consider such initial Business Combination.

Section 9.3 Distributions from the Trust Account.

(a) A Public Stockholder shall be entitled to receive funds from the Trust Account only as provided in Sections 9.2(a), 9.2(b), 9.2(d) or 9.7 hereof. In no other circumstances shall a Public Stockholder have any right or interest of any kind in or to distributions from the Trust Account, and no stockholder other than a Public Stockholder shall have any interest in or to the Trust Account.

(b) Each Public Stockholder that does not exercise its Redemption Rights shall retain its interest in the Corporation and shall be deemed to have given its consent to the release of the remaining funds in the Trust Account to the Corporation, and following payment to any Public Stockholders exercising their Redemption Rights, the remaining funds in the Trust Account shall be released to the Corporation.

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(c) The exercise by a Public Stockholder of the Redemption Rights shall be conditioned on such Public Stockholder following the specific procedures for redemptions set forth by the Corporation in any applicable tender offer or proxy materials sent to the Public Stockholders relating to the proposed initial Business Combination. Payment of the amounts necessary to satisfy the Redemption Rights properly exercised shall be made as promptly as practical after the consummation of the initial Business Combination.

Section 9.4 Share Issuances. Prior to the consummation of the Corporation’s initial Business Combination, the Corporation shall not issue any additional shares of capital stock of the Corporation that would entitle the holders thereof to receive funds from the Trust Account or vote on any initial Business Combination, on any pre-Business Combination Activity or any amendment to this Article IX.

Section 9.5 Transactions with Affiliates. In the event the Corporation enters into an initial Business Combination with a target business that is affiliated with the Sponsor, or the directors or officers of the Corporation, the Corporation, or a committee of the independent directors of the Corporation, shall obtain an opinion from an independent investment banking firm or another independent entity that commonly renders valuation opinions that such Business Combination is fair to the Corporation from a financial point of view.

Section 9.6 No Transactions with Other Blank Check Companies. The Corporation shall not enter into an initial Business Combination with another blank check company or a similar company with nominal operations.

Section 9.7 Additional Redemption Rights. If, in accordance with Section 9.1(a) hereof, any amendment is made to Section 9.2(d) (i) to modify the substance or timing of the Corporation’s obligation to provide for the redemption of the Offering Shares as described in the Registration Statement or (ii) with respect to any other material provisions relating to stockholders’ rights or pre-initial Business Combination activity, the Public Stockholders shall be provided with the opportunity to redeem their Offering Shares upon the approval of any such amendment, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest earned on the funds held in the Trust Account and not previously released to the Corporation to pay its taxes, divided by the number of then outstanding Offering Shares.

Section 9.8 Approval of Business Combination. Notwithstanding any other provision in this Third Amended and Restated Certificate, approval of the initial Business Combination shall require the affirmative vote of a majority of the Board, which must include a majority of the Corporation’s independent directors and each of the non-independent directors nominated by the Sponsor.

Section 9.9 Minimum Value of Target. The Corporation’s initial Business Combination must occur with one or more target businesses that together have a fair market value of at least eighty percent (80%) of the net assets held in the Trust Account (net of amounts disbursed to management for working capital purposes and excluding the amount of any deferred underwriting discount held in trust at the time of the agreement to enter into the initial Business Combination.

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Section 9.10 Waiver of Claims against Trust Account. In addition to the waiver contained in Section 4.3(e), no holder of shares of Class B Common Stock prior to the Offering shall be entitled, with respect to any such shares, to any: (i) right, title, interest or claim of any kind in or to any monies held in the Trust Account (as defined below), including but not limited to upon a liquidation, dissolution or winding up of the Corporation, (ii) Redemption Rights in connection with the consummation of a Business Combination, or (iii) redemption rights in connection with a vote seeking to amend this Third Amended and Restated Certificate (A) to provide for the redemption of the Offering Shares as described in the Registration Statement or (B) with respect to any other material provisions relating to stockholders’ rights or pre-initial Business Combination activity.

ARTICLE X

CORPORATE OPPORTUNITY

To the extent allowed by law, the doctrine of corporate opportunity, or any other analogous doctrine, shall not apply with respect to the Corporation or any of its officers or directors in circumstances where the application of any such doctrine to a corporate opportunity would conflict with any fiduciary duties or contractual obligations they may have as of the date of this Third Amended and Restated Certificate or in the future. The Corporation renounces any expectancy that any director or officer of the Corporation will offer any such corporate opportunity to the Corporation unless such corporate opportunity is expressly offered to such person solely in his or her capacity as a director or officer of the Corporation and such opportunity is one the Corporation is legally and contractually permitted to undertake and would otherwise be reasonable for the Corporation to pursue and the director or officer is permitted to refer that opportunity to the Corporation without violating any other legal obligation.

ARTICLE XI

AMENDMENT OF THIRD AMENDED AND RESTATED CERTIFICATE OF

INCORPORATION

The Corporation reserves the right at any time and from time to time to amend, alter, change or repeal any provision contained in this Third Amended and Restated Certificate (including any Preferred Stock Designation), and other provisions authorized by the laws of the State of Delaware at the time in force that may be added or inserted, in the manner now or hereafter prescribed by this Third Amended and Restated Certificate and the DGCL; and, except as set forth in Article VIII, all rights, preferences and privileges of whatever nature herein conferred upon stockholders, directors or any other persons by and pursuant to this Third Amended and Restated Certificate in its present form or as hereafter amended are granted subject to the right reserved in this Article XI of this Third Amended and Restated Certificate; provided, however, that Article IX may be amended only as provided therein.

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ARTICLE XII

EXCLUSIVE FORUM FOR CERTAIN LAWSUITS; CONSENT

Section 12.1 Forum. Subject to the last sentence in this Section 12.1 and unless the Corporation consents in writing to the selection of an alternative forum, to the fullest extent permitted by the applicable law, the Court of Chancery of the State of Delaware (the “Court of Chancery”) shall be the sole and exclusive forum for any stockholder (including a beneficial owner) to bring (a) any derivative action or proceeding brought on behalf of the Corporation, (b) any action asserting a claim of breach of a fiduciary duty owed by any director, officer or other employee of the Corporation to the Corporation or the Corporation’s stockholders, (c) any action asserting a claim against the Corporation, its directors, officers or employees arising pursuant to any provision of the DGCL or this Third Amended and Restated Certificate or the Bylaws, or (d) any action asserting a claim against the Corporation, its directors, officers or employees governed by the internal affairs doctrine, except for, as to each of clauses (a) through (d) above, any claim arising under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, any claim as to which the Court of Chancery determines that there is an indispensable party not subject to the jurisdiction of the Court of Chancery (and the indispensable party does not consent to the personal jurisdiction of the Court of Chancery within ten (10) days following such determination), which is vested in the exclusive jurisdiction of a court or forum other than the Court of Chancery, or for which the Court of Chancery does not have subject matter jurisdiction, in which case, any such claim shall be brought in any other court located in the State of Delaware possessing subject matter jurisdiction. Notwithstanding the foregoing, (i) the provisions of this Section 12.1 will not apply to suits brought to enforce any liability or duty created by the Exchange Act, the Securities Act or any other claim for which federal courts have exclusive jurisdiction and (ii) unless the Corporation consents in writing to the selection of an alternative forum, the federal district courts of the United States of America shall, to the fullest extent permitted by law, be the exclusive forum for the resolution of any complaint asserting a cause of action arising under the Securities Act or the rules and regulations promulgated thereunder.

Section 12.2 Consent to Jurisdiction. If any action the subject matter of which is within the scope of Section 12.1 immediately above is filed in a court other than a court located within the State of Delaware (a “Foreign Action”) in the name of any stockholder, such stockholder shall be deemed to have consented to (i) the personal jurisdiction of the state and federal courts located within the State of Delaware in connection with any action brought in any such court to enforce Section 12.1 immediately above (an “FSC Enforcement Action”) and (ii) having service of process made upon such stockholder in any such FSC Enforcement Action by service upon such stockholder’s counsel in the Foreign Action as agent for such stockholder.

Section 12.3 Severability. If any provision or provisions of this Article XII shall be held to be invalid, illegal or unenforceable as applied to any person or entity or circumstance for any reason whatsoever, then, to the fullest extent permitted by law, the validity, legality and enforceability of such provisions in any other circumstance and of the remaining provisions of this Article XII (including, without limitation, each portion of any sentence of this Article XII containing any such provision held to be invalid, illegal or unenforceable that is not itself held to be invalid, illegal or unenforceable) and the application of such provision to other persons or entities and circumstances shall not in any way be affected or impaired thereby.

Section 12.4 Demand Notice. Any person or entity purchasing or otherwise acquiring or holding any interest in any security of the Corporation shall be deemed to have notice of and consented to the provisions of this Article XII.

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ARTICLE XIII

APPLICATION OF SECTION 203 OF THE DGCL

Section 13.1 Section 203 of the DGCL. The Corporation hereby expressly elects not to be governed by Section 203 of the DGCL.

Section 13.2 Limitation on 203 Business Combinations. Notwithstanding the foregoing, the Corporation shall not engage in any 203 Business Combination (as defined below), at any point in time at which the Corporation’s Common Stock is registered under Section 12(b) or 12(g) of the Exchange Act with any interested stockholder (as defined below) for a period of three (3) years following the time that such stockholder became an interested stockholder, unless:

(a) prior to such time, the Board approved either the 203 Business Combination or the transaction which resulted in the stockholder becoming an interested stockholder,

(b) upon consummation of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least eighty-five percent (85%) of the Corporation’s voting stock outstanding at the time the transaction commenced, excluding for purposes of determining the voting stock outstanding (but not the outstanding voting stock owned by the interested stockholder) those shares owned by (i) persons who are directors and also officers of the Corporation and (ii) employee stock plans in which employee participants do not have the right to determine confidentially whether shares held subject to the plan will be tendered in a tender or exchange offer, or

(c) at or subsequent to that time, the 203 Business Combination is approved by the Board and authorized at an annual or special meeting of stockholders, and not by written consent, by the affirmative vote of at least 66²/₃% of the outstanding voting stock that is not owned by the interested stockholder.

Section 13.3 Certain Definitions. Solely for purposes of this Article XIII, references to:

(a) “affiliate” means a person that directly, or indirectly through one or more intermediaries, controls, or is controlled by, or is under common control with, another person.

(b) “associate,” when used to indicate a relationship with any person, means: (i) any corporation, partnership, unincorporated association or other entity of which such person is a director, officer or partner or is, directly or indirectly, the owner of twenty percent (20%) or more of any class of voting stock; (ii) any trust or other estate in which such person has at least a twenty percent (20%) beneficial interest or as to which such person serves as trustee or in a similar fiduciary capacity; and (iii) any relative or spouse of such person, or any relative of such spouse, who has the same residence as such person.

(c) “203 Business Combination,” when used in reference to the Corporation and any interested stockholder of the Corporation, means:

(i) any merger or consolidation of the Corporation or any direct or indirect majority-owned subsidiary of the Corporation (a) with the interested stockholder, or (b) with any other corporation, partnership, unincorporated association or other entity if the merger or consolidation is caused by the interested stockholder and as a result of such merger or consolidation Section 13.2 hereof is not applicable to the surviving entity;

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(ii) any sale, lease, exchange, mortgage, pledge, transfer or other disposition (in one transaction or a series of transactions), except proportionately as a stockholder of the Corporation, to or with the interested stockholder, whether as part of a dissolution or otherwise, of assets of the Corporation or of any direct or indirect majority-owned subsidiary of the Corporation which assets have an aggregate market value equal to ten percent (10%) or more of either the aggregate market value of all the assets of the Corporation determined on a consolidated basis or the aggregate market value of all the outstanding stock of the Corporation;

(iii) any transaction which results in the issuance or transfer by the Corporation or by any direct or indirect majority-owned subsidiary of the Corporation of any stock of the Corporation or of such subsidiary to the interested stockholder, except: (A) pursuant to the exercise, exchange or conversion of securities exercisable for, exchangeable for or convertible into stock of the Corporation or any such subsidiary which securities were outstanding prior to the time that the interested stockholder became such; (B) pursuant to a merger under Section 251(g) of the DGCL; (C) pursuant to a dividend or distribution paid or made, or the exercise, exchange or conversion of securities exercisable for, exchangeable for or convertible into stock of the Corporation or any such subsidiary which security is distributed, pro rata to all stockholders of a class or series of stock of the Corporation subsequent to the time the interested stockholder became such; (D) pursuant to an exchange offer by the Corporation to purchase stock made on the same terms to all stockholders of said stock; or (E) any issuance or transfer of stock by the Corporation; provided, however, that in no case under clauses (C) through (E) of this subsection (iii) shall there be an increase in the interested stockholder’s proportionate share of the stock of any class or series of the Corporation or of the voting stock of the Corporation (except as a result of immaterial changes due to fractional share adjustments); or

(iv) any transaction involving the Corporation or any direct or indirect majority-owned subsidiary of the Corporation which has the effect, directly or indirectly, of increasing the proportionate share of the stock of any class or series, or securities convertible into the stock of any class or series, of the Corporation or of any such subsidiary which is owned by the interested stockholder, except as a result of immaterial changes due to fractional share adjustments or as a result of any purchase or redemption of any shares of stock not caused, directly or indirectly, by the interested stockholder.

(d) “control,” including the terms “controlling,” “controlled by” and “under common control with,” means the possession, directly or indirectly, of the power to direct or cause the direction of the management and policies of a person, whether through the ownership of voting stock, by contract, or otherwise. A person who is the owner of twenty percent (20%) or more of the voting power of the outstanding voting stock of the Corporation, partnership, unincorporated association or other entity shall be presumed to have control of such entity, in the absence of proof by a preponderance of the evidence to the contrary. Notwithstanding the foregoing, a presumption of control shall not apply where such person holds voting stock, in good faith and not for the purpose of circumventing this Article XIII, as an agent, bank, broker, nominee, custodian or trustee for one or more owners who do not individually or as a group have control of such entity.

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(e) “Exempted Person” means the Sponsor and its affiliates, any of their direct or indirect transferees of at least twenty percent (20%) of the Corporation’s outstanding Common Stock and any “group” of which any such person is a part under Rule 13d-5 of the Exchange Act.

(f) “interested stockholder” means any person (other than the Corporation or any direct or indirect majority-owned subsidiary of the Corporation) that (i) is the owner of twenty percent (20%) or more of the voting stock of the Corporation, or (ii) is an affiliate or associate of the Corporation and was the owner of twenty percent (20%) or more of the voting stock of the Corporation at any time within the three (3) year period immediately prior to the date on which it is sought to be determined whether such person is an interested stockholder; and the affiliates and associates of such person; but “interested stockholder” shall not include (A) any Exempted Person, or (B) any person whose ownership of shares in excess of the twenty percent (20%) limitation set forth herein is the result of any action taken solely by the Corporation; provided that with respect to clause (B) such person shall be an interested stockholder if thereafter such person acquires additional shares of voting stock of the Corporation, except as a result of further corporate action not caused, directly or indirectly, by such person. For the purpose of determining whether a person is an interested stockholder, the voting stock of the Corporation deemed to be outstanding shall include stock deemed to be owned by the person through application of the definition of “owner” below but shall not include any other unissued stock of the Corporation which may be issuable pursuant to any agreement, arrangement or understanding, or upon exercise of conversion rights, warrants or options, or otherwise.

(g) “owner,” including the terms “own” and “owned,” when used with respect to any stock, means a person that individually or with or through any of its affiliates or associates:

(i) beneficially owns such stock, directly or indirectly; or

(ii) has (A) the right to acquire such stock (whether such right is exercisable immediately or only after the passage of time) pursuant to any agreement, arrangement or understanding, or upon the exercise of conversion rights, exchange rights, warrants or options, or otherwise; provided, however, that a person shall not be deemed the owner of stock tendered pursuant to a tender or exchange offer made by such person or any of such person’s affiliates or associates until such tendered stock is accepted for purchase or exchange; or (B) the right to vote such stock pursuant to any agreement, arrangement or understanding; provided, however, that a person shall not be deemed the owner of any stock because of such person’s right to vote such stock if the agreement, arrangement or understanding to vote such stock arises solely from a revocable proxy or consent given in response to a proxy or consent solicitation made to ten (10) or more persons; or

(iii) has any agreement, arrangement or understanding for the purpose of acquiring, holding, voting (except voting pursuant to a revocable proxy or consent as described in clause (B) of subsection (ii) above), or disposing of such stock with any other person that beneficially owns, or whose affiliates or associates beneficially own, directly or indirectly, such stock.

(h) “person” means any individual, corporation, partnership, unincorporated association or other entity.

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(i) “stock” means, with respect to any corporation, capital stock and, with respect to any other entity, any equity interest.

(j) “voting stock” means stock of any class or series entitled to vote generally in the election of directors.

[Signature Page Follows]

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IN WITNESS WHEREOF, Black Mountain Acquisition Corp. has caused this Third Amended and Restated Certificate to be duly executed and acknowledged in its name and on its behalf by an authorized officer as of the date first set forth above.

SIGNATURE PAGE TO

THIRD AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION OF

BLACK MOUNTAIN ACQUISITION CORP.

Exhibit 10.2

SECOND AMENDED AND RESTATED INVESTMENT MANAGEMENT TRUST AGREEMENT

This Second Amended and Restated Investment Management Trust Agreement (this “Agreement”) is made effective as of November 17, 2023 by and between Black Mountain Acquisition Corp., a Delaware corporation (the “Company”), and Continental Stock Transfer & Trust Company, a New York corporation (the “Trustee”) and amends and restates in its entirety that certain Amended and Restated Investment Management Trust Agreement, dated as of April 17, 2023, by and between the Company and the Trustee (the “Existing Agreement”).

WHEREAS, the Company’s registration statement on Form S-1 (File No. 333-259469) (the “Registration Statement”) and prospectus (the “Prospectus”) for the initial public offering of the Company’s units (the “Units”), each of which consists of one share of the Company’s Class A common stock, par value $0.0001 per share (the “Common Stock”), and three quarters of one redeemable warrant, each whole warrant entitling the holder thereof to purchase one share of Common Stock (such initial public offering hereinafter referred to as the “Offering”), was declared effective on October 13, 2021 by the U.S. Securities and Exchange Commission;

WHEREAS, on October 18, 2021, the Company consummated the Offering;

WHEREAS, the Company has entered into an Underwriting Agreement (the “Underwriting Agreement”) with EarlyBirdCapital, Inc. and Stephens Inc. as representatives (the “Representatives”) of the underwriters (the “Underwriters”) named therein;

WHEREAS, as described in the Registration Statement, $281,520,000 of the gross proceeds of the Offering and sale of the Private Placement Warrants (as defined in the Underwriting Agreement), the Initial Extension Payment and Monthly Extension Payments (as each is defined below), were delivered to the Trustee to be deposited and held in a segregated trust account located at all times in the United States (the “Trust Account”) for the benefit of the Company and the holders of the Common Stock included in the Units issued in the Offering (the amount delivered to the Trustee (and any interest subsequently earned thereon) is referred to herein as the “Property,” the stockholders for whose benefit the Trustee shall hold the Property will be referred to as the “Public Stockholders,” and the Public Stockholders and the Company will be referred to together as the “Beneficiaries”);

WHEREAS, pursuant to the Underwriting Agreement, a portion of the Property equal to $9,660,000 is attributable to deferred underwriting discounts and commissions that may be payable by the Company to the Underwriters upon the consummation of the Business Combination (as defined below) (the “Deferred Discount”);

WHEREAS, pursuant to the Company’s Second Amended and Restated Certificate of Incorporation, dated as of April 17, 2023, the Company extended the date by which it has to consummate an initial Business Combination (i) from April 18, 2023 to June 18, 2023 (the “Initial Extension”) and Black Mountain Sponsor LLC (the “Sponsor”) deposited a total of $320,000 into the Trust Account in connection with the Initial Extension (the “Initial Extension Payment”) and (ii) on a monthly basis from June 18, 2023 to November 18, 2023 (each, an “Initial Monthly Extension”) and the Sponsor deposited $160,000 in connection with each such Monthly Extension (or a total of $800,000) (the “Monthly Extension Payments”), each in exchange for non-interest bearing, unsecured promissory notes in connection with extending the period that the Company has to consummate an initial Business Combination;

WHEREAS, if a Business Combination (as defined below) is not consummated within the 25-month period following the closing of the Offering, the board of directors of the Company (the “Board”) may elect to extend such period (each, an “Extension Period”), up to six (6) times (for a total of up to six (6) additional months), but in no event to a date later than 31 months from the closing of the Offering (or, if the Office of the Delaware Division of Corporations shall not be open for business (including filing of corporate documents) on such date, the next date upon which the Office of the Delaware Division of Corporations shall be open), without the payment of any additional funds into the Trust Account for each Extension Period;

WHEREAS, on October 13, 2021, the Company and the Trustee entered into that certain Investment Management Trust Agreement, dated as of October 13, 2021;

WHEREAS, on April 17, 2023, the Company and the Trustee entered into the Existing Agreement;

WHEREAS, pursuant to Section 6(c) of the Existing Agreement, the Company has obtained the affirmative vote of holders of at least sixty-five percent (65%) of the then issued and outstanding shares of Common Stock and Class B Common Stock, voting together as a single class, approving entry into this Agreement by the Company; and

WHEREAS, the Company and the Trustee desire to enter into this Agreement which shall amend and restate the Existing Agreement in its entirety.

NOW THEREFORE, IT IS AGREED:

1. Agreements and Covenants of Trustee. The Trustee hereby agrees and covenants to:

(a) Hold the Property in trust for the Beneficiaries in accordance with the terms of this Agreement in the Trust Account established by the Trustee in the United States, maintained by the Trustee and at Citibank, N.A. (or at another U.S. chartered commercial bank with consolidated assets of $100 billion or more) and at a brokerage institution selected by the Trustee and reasonably satisfactory to the Company;

(b) Manage, supervise and administer the Trust Account subject to the terms and conditions set forth herein;

(c) In a timely manner, upon the written instruction of the Company, invest and reinvest the Property (i) in United States government securities within the meaning of Section 2(a)(16) of the Investment Company Act of 1940, as amended, having a maturity of 185 days or less, or in money market funds meeting the conditions of paragraphs (d)(1), (d)(2), (d)(3) and (d)(4) of Rule 2a-7 promulgated under the Investment Company Act of 1940, as amended, which invest only in direct U.S. government treasury obligations, as determined by the Company or (ii) in an interest bearing demand deposit account, each until the earlier of: (x) the completion

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of its initial Business Combination and (y) the distribution of the Trust Account; the Trustee may not invest in any other securities or assets, it being understood that the Trust Account will earn no interest while account funds are uninvested awaiting the Company’s instructions hereunder and, while the account funds are invested or uninvested, the trustee may earn bank credits or other considerations;

(d) Collect and receive, when due, all interest or other income arising from the Property, which shall become part of the “Property,” as such term is used herein;

(e) Promptly notify the Company of all communications received by the Trustee with respect to any Property requiring action by the Company;

(f) Supply any necessary information or documents as may be requested by the Company (or its authorized agents) in connection with the Company’s preparation of the tax returns relating to assets held in the Trust Account;

(g) Participate in any plan or proceeding for protecting or enforcing any right or interest arising from the Property if, as and when instructed by the Company to do so;

(h) Render to the Company monthly written statements of the activities of, and amounts in, the Trust Account reflecting all receipts and disbursements of the Trust Account;

(i) Commence liquidation of the Trust Account only after and promptly after (x) receipt of, and only in accordance with, the terms of a letter from the Company (the “Termination Letter”) in a form substantially similar to that attached hereto as either Exhibit A or Exhibit B, as applicable, signed on behalf of the Company by its Chief Executive Officer, President, Chief Financial Officer, Secretary or Chairman of the Board or other authorized officer of the Company and, in the case of Exhibit A, acknowledged and agreed to by the Representatives and complete the liquidation of the Trust Account and distribute the Property in the Trust Account, including interest not previously released to the Company to pay its taxes (less up to $100,000 of interest that may be released to the Company to pay dissolution expenses and net of taxes payable), only as directed in the Termination Letter and the other documents referred to therein, or (y) upon the date which is the latest to occur of (1) 25 months after the closing of the Offering, or such later date upon an effectuation of an Extension Period (each such date, a “Deadline”) pursuant to the Company’s Third Amended and Restated Certificate of Incorporation (the “Charter”) or (2) such later date as may be approved by the Company’s stockholders in accordance with the Charter, if a Termination Letter has not been received by the Trustee prior to such date, in which case the Trust Account shall be liquidated in accordance with the procedures set forth in the Termination Letter attached as Exhibit B and the Property in the Trust Account, including interest not previously released to the Company to pay its taxes (less up to $100,000 of interest that may be released to the Company to pay dissolution expenses and net of taxes payable) shall be distributed to the Public Stockholders of record as of such date;

(j) Upon written request from the Company, which may be given from time to time in a form substantially similar to that attached hereto as Exhibit C (a “Tax Payment Withdrawal Instruction”), withdraw from the Trust Account and distribute to the Company the amount of interest earned on the Property requested by the Company to cover any income or

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franchise tax obligation owed by the Company as a result of assets of the Company or interest or other income earned on the Property, which amount shall be delivered directly to the Company by electronic funds transfer or other method of prompt payment, and the Company shall forward such payment to the relevant taxing authority, so long as there is no reduction in the principal amount per share initially deposited in the Trust Account; provided, however, that to the extent there is not sufficient cash in the Trust Account to pay such tax obligation, the Trustee shall liquidate such assets held in the Trust Account as shall be designated by the Company in writing to make such distribution; provided, further, that if the tax to be paid is a franchise tax, the written request by the Company to make such distribution shall be accompanied by a copy of the franchise tax bill from the State of Delaware for the Company and a written statement from the principal financial officer of the Company setting forth the actual amount payable. The written request of the Company referenced above shall constitute presumptive evidence that the Company is entitled to said funds, and the Trustee shall have no responsibility to look beyond said request;

(k) Upon written request from the Company, which may be given from time to time in a form substantially similar to that attached hereto as Exhibit D (a “Stockholder Redemption Withdrawal Instruction”), the Trustee shall distribute on behalf of the Company the amount requested by the Company to be used to redeem shares of Common Stock from Public Stockholders properly submitted in connection with a stockholder vote to approve an amendment to the Charter that would affect the substance or timing of the Company’s obligation to redeem 100% of its public shares of Common Stock if the Company has not consummated an initial Business Combination within such time as is described in the Charter. The written request of the Company referenced above shall constitute presumptive evidence that the Company is entitled to distribute said funds, and the Trustee shall have no responsibility to look beyond said request; and

(l) Not make any withdrawals or distributions from the Trust Account other than pursuant to Sections 1(i)), 1(j) or 1(k) above.

2. Agreements and Covenants of the Company. The Company hereby agrees and covenants to:

(a) Give all instructions to the Trustee hereunder in writing, signed by the Company’s Chairperson of the Board, President, Chief Executive Officer, Chief Financial Officer or Secretary.

In addition, except with respect to its duties under Sections 1(i), 1(j) and 1(k) hereof, the Trustee shall be entitled to rely on, and shall be protected in relying on, any verbal or telephonic advice or instruction which it, in good faith and with reasonable care, believes to be given by any one of the persons authorized above to give written instructions, provided that the Company shall promptly confirm such instructions in writing;

(b) Subject to Section 4 hereof, hold the Trustee harmless and indemnify the Trustee from and against any and all expenses, including reasonable counsel fees and disbursements, or losses suffered by the Trustee in connection with any action taken by it hereunder and in connection with any action, suit or other proceeding brought against the Trustee involving any claim, or in connection with any claim or demand, which in any way arises out of or relates to this Agreement, the services of the Trustee hereunder, or the Property or any interest

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earned on the Property, except for expenses and losses resulting from the Trustee’s gross negligence, fraud or willful misconduct. Promptly after the receipt by the Trustee of notice of demand or claim or the commencement of any action, suit or proceeding, pursuant to which the Trustee intends to seek indemnification under this Section 2(b), it shall notify the Company in writing of such claim (an “Indemnified Claim”). The Trustee shall have the right to conduct and manage the defense against such Indemnified Claim; provided that the Trustee shall obtain the consent of the Company with respect to the selection of counsel, which consent shall not be unreasonably withheld. The Trustee may not agree to settle any Indemnified Claim without the prior written consent of the Company, which such consent shall not be unreasonably withheld. The Company may participate in such action with its own counsel;

(c) Pay the Trustee the fees set forth on Schedule A hereto, including an annual administration fee and transaction processing fee which fees shall be subject to modification by the parties from time to time. It is expressly understood that the Property shall not be used to pay such fees unless and until it is distributed to the Company pursuant to Sections 1(i)), 1(j) or 1(k) hereof. The Company has previously paid the Trustee the initial acceptance fee and the first annual administration fee at the consummation of the Offering. The Company shall not be responsible for any other fees or charges of the Trustee except as set forth in this Section 2(c), Schedule A and as may be provided in Section 2(b) hereof;

(d) In connection with any vote of the Company’s stockholders regarding a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination involving the Company and one or more businesses (the “Business Combination”), provide to the Trustee an affidavit or certificate of the inspector of elections for the stockholder meeting verifying the vote of such stockholders regarding such Business Combination;

(e) Provide the Representatives with a copy of any Termination Letter(s) and/or any other correspondence that is sent to the Trustee with respect to any proposed withdrawal from the Trust Account promptly after it issues the same; and

(f) Instruct the Trustee to make only those distributions that are permitted under this Agreement, and refrain from instructing the Trustee to make any distributions that are not permitted under this Agreement.

3. Limitations of Liability. The Trustee shall have no responsibility or liability to:

(a) Imply obligations, perform duties, inquire or otherwise be subject to the provisions of any agreement or document other than this Agreement and that which is expressly set forth herein;

(b) Take any action with respect to the Property, other than as directed in Section 1 hereof, and the Trustee shall have no liability to any party except for liability arising out of the Trustee’s gross negligence, fraud or willful misconduct;

(c) Institute any proceeding for the collection of any principal and income arising from, or institute, appear in or defend any proceeding of any kind with respect to, any of the Property unless and until it shall have received instructions from the Company given as provided herein to do so and the Company shall have advanced or guaranteed to it funds sufficient to pay any expenses incident thereto;

5

(d) Refund any depreciation in principal of any Property;

(e) Assume that the authority of any person designated by the Company to give instructions hereunder shall not be continuing unless provided otherwise in such designation, or unless the Company shall have delivered a written revocation of such authority to the Trustee;

(f) The other parties hereto or to anyone else for any action taken or omitted by it, or any action suffered by it to be taken or omitted, in good faith and in the Trustee’s best judgment, except for the Trustee’s gross negligence, fraud or willful misconduct. The Trustee may rely conclusively and shall be protected in acting upon any order, notice, demand, certificate, opinion or advice of counsel (including counsel chosen by the Trustee, which counsel may be the Company’s counsel), statement, instrument, report or other paper or document (not only as to its due execution and the validity and effectiveness of its provisions, but also as to the truth and acceptability of any information therein contained) which the Trustee believes, in good faith and with reasonable care, to be genuine and to be signed or presented by the proper person or persons. The Trustee shall not be bound by any notice or demand, or any waiver, modification, termination or rescission of this Agreement or any of the terms hereof, unless evidenced by a written instrument delivered to the Trustee, signed by the proper party or parties and, if the duties or rights of the Trustee are affected, unless it shall give its prior written consent thereto;

(g) Verify the accuracy of the information contained in the Registration Statement;

(h) Provide any assurance that any Business Combination entered into by the Company or any other action taken by the Company is as contemplated by the Registration Statement;

(i) File information returns with respect to the Trust Account with any local, state or federal taxing authority or provide periodic written statements to the Company documenting the taxes payable by the Company, if any, relating to any interest income earned on the Property;

(j) Prepare, execute and file tax reports, income or other tax returns and pay any taxes with respect to any income generated by, and activities relating to, the Trust Account, regardless of whether such tax is payable by the Trust Account or the Company, including, but not limited to, income tax obligations, except pursuant to Section 1(j) hereof; or

(k) Verify calculations, qualify or otherwise approve the Company’s written requests for distributions pursuant to Sections 1(i), 1(j) and 1(k) hereof.

4. Trust Account Waiver. The Trustee has no right of set-off or any right, title, interest or claim of any kind (a “Claim”) to, or to any monies in, the Trust Account, and hereby irrevocably waives any Claim to, or to any monies in, the Trust Account that it may have now or in the future. In the event the Trustee has any Claim against the Company under this Agreement, including, without limitation, under Section 2(b) or Section 2(c) hereof, the Trustee shall pursue such Claim solely against the Company and its assets outside the Trust Account and not against the Property or any monies in the Trust Account.

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5. Termination. This Agreement shall terminate as follows:

(a) If the Trustee gives written notice to the Company that it desires to resign under this Agreement, the Company shall use its reasonable efforts to locate a successor trustee, pending which the Trustee shall continue to act in accordance with this Agreement. At such time that the Company notifies the Trustee that a successor trustee has been appointed and has agreed to become subject to the terms of this Agreement, the Trustee shall transfer the management of the Trust Account to the successor trustee, including but not limited to the transfer of copies of the reports and statements relating to the Trust Account, whereupon this Agreement shall terminate; provided, however, that in the event that the Company does not locate a successor trustee within ninety (90) days of receipt of the resignation notice from the Trustee, the Trustee may submit an application to have the Property deposited with any court in the State of New York or with the United States District Court for the Southern District of New York and upon such deposit, the Trustee shall be immune from any liability whatsoever; or

(b) At such time that the Trustee has completed the liquidation of the Trust Account and its obligations in accordance with the provisions of Section 1(i) hereof and distributed the Property in accordance with the provisions of the Termination Letter, this Agreement shall terminate except with respect to Section 2(b) hereof.

6. Miscellaneous.

(a) The Company and the Trustee each acknowledge that the Trustee will follow the security procedures set forth below with respect to funds transferred from the Trust Account. The Company and the Trustee will each restrict access to confidential information relating to such security procedures to authorized persons. Each party must notify the other party immediately if it has reason to believe unauthorized persons may have obtained access to such confidential information, or of any change in its authorized personnel. In executing funds transfers, the Trustee shall rely upon all information supplied to it by the Company, including, account names, account numbers, and all other identifying information relating to a Beneficiary, Beneficiary’s bank or intermediary bank. Except for any liability arising out of the Trustee’s gross negligence, fraud or willful misconduct, the Trustee shall not be liable for any loss, liability or expense resulting from any error in the information or transmission of the funds.

(b) This Agreement shall be governed by and construed and enforced in accordance with the laws of the State of New York, without giving effect to conflicts of law principles that would result in the application of the substantive laws of another jurisdiction. This Agreement may be executed in several original or facsimile counterparts, each one of which shall constitute an original, and together shall constitute but one instrument.

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(c) This Agreement contains the entire agreement and understanding of the parties hereto with respect to the subject matter hereof. Except for Sections 1(i), 1(j) and 1(k) hereof (which sections may not be modified, amended or deleted without the affirmative vote of sixty-five percent (65%) of the then outstanding shares of Common Stock and shares of Class B common stock, par value $0.0001 per share, of the Company, voting together as a single class; provided that no such amendment will affect any Public Stockholder who has properly elected to redeem his, her or its shares of Common Stock in connection with a stockholder vote to approve an amendment to this Agreement that would affect the substance or timing of the Company’s obligation to redeem 100% of its public shares of Common Stock if the Company does not complete its initial Business Combination within the time frame specified in the Charter), this Agreement or any provision hereof may only be changed, amended or modified (other than to correct a typographical error) by a writing signed by each of the parties hereto.

(d) The parties hereto consent to the jurisdiction and venue of any state or federal court located in the City of New York, State of New York, for purposes of resolving any disputes hereunder. AS TO ANY CLAIM, CROSS-CLAIM OR COUNTERCLAIM IN ANY WAY RELATING TO THIS AGREEMENT, EACH PARTY WAIVES THE RIGHT TO TRIAL BY JURY.

(e) Any notice, consent or request to be given in connection with any of the terms or provisions of this Agreement shall be in writing and shall be sent by express mail or similar private courier service, by certified mail (return receipt requested), by hand delivery or by facsimile or email transmission:

if to the Trustee, to:

Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis Wolf and Celeste Gonzalez

Email: fwolf@continentalstock.com

Email: cgonzalez@continentalstock.com

if to the Company, to:

Black Mountain Acquisition Corp.

425 Houston Street, Suite 400

Fort Worth, Texas 76102

Attn: Rhett Bennett

Email: rhett.bennett@blackmtn.com

in each case, with copies to:

Vinson & Elkins L.L.P.

845 Texas Avenue, Suite 4700

Houston, Texas 77002

Attn: Ramey Layne

Email: rlayne@velaw.com

8

and

EarlyBirdCapital, Inc.

366 Madison Avenue, 8th Floor

New York, New York 10017

Attn: Mike Powell

Email: Mpowell@ebcap.com

and

Stephens Inc.

300 Crescent Court Suite 600

Dallas, Texas 75201

Attn: Keith J. Behrens

Email: keith.behrens@stephens.com

and

Graubard Miller

The Chrysler Building

405 Lexington Avenue

New York, NY 10174

Attn: David Alan Miller

Email: DMiller@graubard.com

(f) Each of the Company and the Trustee hereby represents that it has the full right and power and has been duly authorized to enter into this Agreement and to perform its respective obligations as contemplated hereunder. The Trustee acknowledges and agrees that it shall not make any claims or proceed against the Trust Account, including by way of set-off, and shall not be entitled to any funds in the Trust Account under any circumstance.

(g) Each of the Company and the Trustee hereby acknowledges and agrees that each of the Representatives, on behalf of the Underwriters, is a third party beneficiary of this Agreement.

(h) Except as specified herein, no party to this Agreement may assign its rights or delegate its obligations hereunder to any other person or entity.

[Signature Page Follows]

9

IN WITNESS WHEREOF, the parties have duly executed this Second Amended and Restated Investment Management Trust Agreement as of the date first written above.

[Signature Page to Second Amended and Restated Investment Management Trust Agreement]

SCHEDULE A

Schedule A-1

EXHIBIT A

[Letterhead of Company]

[Insert date]

Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis Wolf and Celeste Gonzalez

Re: Trust Account—Termination Letter

Dear Mr. Wolf and Ms. Gonzalez:

Pursuant to Section 1(i) of the Second Amended and Restated Investment Management Trust Agreement between Black Mountain Acquisition (the “Company”) and Continental Stock Transfer & Trust Company (the “Trustee”), dated as of November 17, 2023 (as amended, the “Trust Agreement”), this is to advise you that the Company has entered into an agreement with [        ] (the “Target Business”) to consummate a business combination with the Target Business (the “Business Combination”) on or about [        ], 20[        ]. The Company shall notify you at least seventy-two (72) hours in advance of the actual date of the consummation of the Business Combination (the “Consummation Date”). Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement.

In accordance with the terms of the Trust Agreement, we hereby authorize you to commence to liquidate all of the assets of the Trust Account and to transfer the proceeds into the trust operating account at Citibank, N.A. to the effect that, on the Consummation Date, all of the funds held in the Trust Account will be immediately available for transfer to the account or accounts that the Company shall direct on the Consummation Date (including as directed to it by the Representatives on behalf of the Underwriters (with respect to the Deferred Discount)). It is acknowledged and agreed that while the funds are on deposit in the trust operating account at Citibank, N.A. awaiting distribution, the Company will not earn any interest or dividends.

On the Consummation Date (i) counsel for the Company shall deliver to you written notification that the Business Combination has been consummated, or will be consummated concurrently with your transfer of funds to the accounts as directed by the Company (the “Notification”) and (ii) the Company shall deliver to you (a) a certificate of the Chief Executive Officer of the Company, which verifies that the Business Combination has been approved by a vote of the Company’s stockholders, if a vote is held and (b) a joint written instruction signed by the Company and the Representatives with respect to the transfer of the funds held in the Trust Account, including payment of amounts owed to public stockholders who have properly exercised their redemption rights and payment of the Deferred Discount directly to the account or accounts directed by the Representatives from the Trust Account (the “Instruction Letter”). You are hereby directed and authorized to transfer the funds held in the Trust Account immediately upon your receipt of the Notification and the Instruction Letter, in accordance with the terms of the Instruction Letter. In the event that certain deposits held in the Trust Account may not be liquidated by the

Exhibit A-1

Consummation Date without penalty, you will notify the Company in writing of the same and the Company shall direct you as to whether such funds should remain in the Trust Account and be distributed after the Consummation Date to the Company. Upon the distribution of all the funds, net of any payments necessary for reasonable unreimbursed expenses related to liquidating the Trust Account, your obligations under the Trust Agreement shall be terminated.

In the event that the Business Combination is not consummated on the Consummation Date described in the notice thereof and we have not notified you on or before the original Consummation Date of a new Consummation Date, then upon receipt by the Trustee of written instructions from the Company, the funds held in the Trust Account shall be reinvested as provided in Section 1(c) of the Trust Agreement on the business day immediately following the Consummation Date as set forth in such written instructions as soon thereafter as possible.

Exhibit A-2

EXHIBIT B

[Letterhead of Company]

[Insert date]

Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis Wolf and Celeste Gonzalez

Dear Mr. Wolf and Ms. Gonzalez:

Pursuant to Section 1(i) of the Second Amended and Restated Investment Management Trust Agreement between Black Mountain Acquisition Corp. (the “Company”) and Continental Stock Transfer & Trust Company (the “Trustee”), dated as of November 17, 2023 (as amended, the “Trust Agreement”), this is to advise you that the Company has been unable to effect a business combination with a target business within the time frame specified in the Company’s Third Amended and Restated Certificate of Incorporation (the “Charter”), as described in the Company’s Definitive Proxy Statement on Schedule 14A filed with the U.S. Securities and Exchange Commission on October 24, 2023. Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement.

In accordance with the terms of the Trust Agreement, we hereby authorize you to liquidate all of the assets in the Trust Account and to transfer the total proceeds into the trust operating account at Citibank, N.A. to await distribution to the Public Stockholders. The Company has selected [                ], 20[    ] as the effective date for the purpose of determining when the Public Stockholders will be entitled to receive their share of the liquidation proceeds. You agree to be the paying agent of record and, in your separate capacity as paying agent, agree to distribute said funds directly to the Public Stockholders in accordance with the terms of the Trust Agreement and the Charter. Upon the distribution of all the funds, net of any payments necessary for reasonable unreimbursed expenses related to liquidating the Trust Account, your obligations under the Trust Agreement shall be terminated, except to the extent otherwise provided in Section 1(j) of the Trust Agreement.

Stephens Inc.

Exhibit B-1

EXHIBIT C

[Letterhead of Company]

[Insert date]

Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis Wolf and Celeste Gonzalez

Dear Mr. Wolf and Ms. Gonzalez:

Pursuant to Section 1(j) of the Second Amended and Restated Investment Management Trust Agreement between Black Mountain Acquisition Corp. (the “Company”) and Continental Stock Transfer & Trust Company (the “Trustee”), dated as of November 17, 2023 (as amended, the “Trust Agreement”), the Company hereby requests that you deliver to the Company $[                ] of the interest income earned on the Property as of the date hereof. Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement.

The Company needs such funds to pay for the tax obligations as set forth on the attached tax return or tax statement. In accordance with the terms of the Trust Agreement, you are hereby directed and authorized to transfer (via wire transfer) such funds promptly upon your receipt of this letter to the Company’s operating account at:

[WIRE INSTRUCTION INFORMATION]

Stephens Inc.

Exhibit C-1

EXHIBIT D

[Letterhead of Company]

[Insert date]

Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis Wolf and Celeste Gonzalez

Dear Mr. Wolf and Ms. Gonzalez:

Pursuant to Section 1(k) of the Second Amended and Restated Investment Management Trust Agreement between Black Mountain Acquisition Corp. (the “Company”) and Continental Stock Transfer & Trust Company (the “Trustee”), dated as of November 17, 2023 (as amended, the “Trust Agreement”), the Company hereby requests that you deliver to the redeeming Public Stockholders of the Company $[                ] of the principal and interest income earned on the Property as of the date hereof. Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement.

The Company needs such funds to pay its Public Stockholders who have properly elected to have their shares of Common Stock redeemed by the Company in connection with a stockholder vote to approve an amendment to the Company’s third amended and restated certificate of incorporation (the “Charter”) that affects the substance or timing of the Company’s obligation to redeem 100% of its public shares of Common Stock if the Company has not consummated an initial Business Combination within such time as is described in the Charter. As such, you are hereby directed and authorized to transfer (via wire transfer) such funds promptly upon your receipt of this letter to the redeeming Public Stockholders in accordance with your customary procedures.

Stephens Inc.

Exhibit D-1

Exhibit 99.1

Black Mountain Acquisition Corp. Announces Stockholder Approval of Extension of Deadline to Complete Initial Business Combination

FORT WORTH, TX, November 17, 2023 – Black Mountain Acquisition Corp. (the “Company”) (NYSE: BMAC, BMAC.U, BMAC WS) announced today that its stockholders approved an extension of the date by which it has to consummate its initial business combination (the “Deadline Date”), allowing the Company’s board of directors (the “Board”), without another stockholder vote, to extend such date up to six times for an additional one month each time (each, an “Extension Period”), or up to May 18, 2024, without depositing any additional funds into the Company’s trust account for its public stockholders.

The Board has elected to extend the Deadline Date by one month from November 18, 2023 to December 18, 2023, as permitted under the Company’s third amended and restated certificate of incorporation.

About Black Mountain Acquisition Corp.

Black Mountain Acquisition Corp. is a blank check company formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses.

Forward-Looking Statements

This press release may include, and oral statements made from time to time by representatives of the Company may include, “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Exchange Act. All statements other than statements of historical fact included in this press release are forward-looking statements. When used in this press release, words such as “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “might,” “plan,” “possible,” “potential,” “predict,” “project,” “should,” “would” and similar expressions, as they relate to the Company or its management team, may identify forward-looking statements. Such forward-looking statements are based on the beliefs of management, as well as assumptions made by, and information currently available to, the Company’s management. Actual results could differ materially from those contemplated by the forward-looking statements as a result of certain factors detailed in the Company’s filings with the U.S. Securities and Exchange Commission (the “SEC”). All subsequent written or oral forward-looking statements attributable to the Company or persons acting on its behalf are qualified in their entirety by this paragraph. Forward-looking statements are subject to numerous conditions, many of which are beyond the control of the Company, including those set forth in the Risk Factors section of the Company’s most recently filed Annual Report on Form 10-K, any subsequently filed Quarterly Reports on Form 10-Q, any subsequently filed Current Reports on Form 8-K and in other reports we file with the SEC. Should one or more of these risks or uncertainties materialize, or should any of our assumptions prove incorrect, actual results may vary in material respects from those projected in these forward-looking statements. The Company undertakes no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws.