Private Placement Share Purchase Agreement, dated July 7, 2021, between the Company and the Sponsor

EXECUTION VERSION

PRIVATE PLACEMENT SHARES PURCHASE AGREEMENT

THIS PRIVATE PLACEMENT SHARES AGREEMENT, dated as of July 7, 2021 (this “Agreement”), is entered into by and between AltC Acquisition Corp., a Delaware corporation (the “Company”), and AltC Sponsor LLC, a Delaware limited liability company (the “Purchaser”).

WHEREAS, the Company intends to consummate an initial public offering (the “Public Offering”), of the Company’s Class A common stock, par value $0.0001 per share (each, a “Share”), as set forth in the Company’s registration statement on Form S-1 related to the Public Offering (the “Registration Statement”); and

WHEREAS, the Purchaser now wishes to purchase an aggregate of 1,350,000 Shares (or 1,450,000 Shares if the underwriters’ over- allotment option is exercised in full) (the “Private Placement Shares”).

NOW THEREFORE, in consideration of the mutual promises contained in this Agreement and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties to this Agreement hereby, intending legally to be bound, agree as follows:

AGREEMENT

Section 1. Authorization, Purchase and Sale; Terms of the Private Placement Shares.

A.            Authorization of the Private Placement Shares. The Company has duly authorized the issuance and sale of the Private Placement Shares to the Purchaser.

(i)                 As payment in full for the 1,350,000 Private Placement Shares being purchased under this Agreement, the Purchaser shall pay $13,500,000 (the “Purchase Price”), by wire transfer of immediately available funds in accordance with the Company’s wiring instructions, at least one (1) business day prior to the effective date of the Registration Statement, or on such other date as the Company and the Purchaser may agree.

(ii)               In the event that the underwriters’ over-allotment option is exercised in full, the Purchaser shall purchase up to an additional 100,000 Private Placement Shares (the “Additional Private Placement Shares”), in the same proportion as the amount of the over-allotment option that is exercised, and simultaneously with such purchase of Additional Private Placement Shares, as payment in full for the Additional Private Placement Shares being purchased hereunder, and at least one (1) business day prior to the closing of all or any portion of the over-allotment option, or on such other date as the Company and the Purchaser may agree, the Purchaser shall pay $10.00 per Additional Private Placement Share, up to an aggregate amount of $1,000,000, by wire transfer of immediately available funds in accordance with the Company’s wiring instructions.

(iii)             The closing of the purchase and sale of the Private Placement Shares shall take place simultaneously with the closing of the Public Offering (the “Initial Closing Date”). The closing of the purchase and sale of the Additional Private Placement Shares, if applicable, shall take place simultaneously with the closing of all or any portion of the over-allotment option (such closing date, together with the Initial Closing Date, the “Closing Dates” and each, a “Closing Date”). The closing of the purchase and sale of each of the Private Placement Shares and the Additional Private Placement Shares shall take place at the offices of Weil, Gotshal & Manges LLP, 767 Fifth Avenue, New York, New York, 10153, or such other place as may be agreed upon by the parties hereto.

(i)                 The Private Placement Shares are substantially identical to the Shares to be offered in the Public Offering except: (a) as provided in that letter agreement, dated as of the date hereof (the “Letter Agreement”), by and among the Company, the Purchaser and each of the Company’s officers, directors and director nominees, and (b) the Private Placement Shares are being purchased pursuant to an exemption from the registration requirements of the Securities Act and will become freely tradable only after the expiration of the lockup described above in the Letter Agreement and they are registered pursuant to the Registration Rights Agreement (as defined below) or an exemption from registration is available, and the restrictions described above in clause (a) have expired.

(ii)               At or prior to the time of the Initial Closing Date, the Company and the Purchaser shall enter into a registration rights agreement (the “Registration Rights Agreement”) pursuant to which the Company will grant certain registration rights to the Purchaser relating to the Private Placement Shares.

Section 2. Representations and Warranties of the Company. As a material inducement to the Purchaser to enter into this Agreement and purchase the Private Placement Shares, the Company hereby represents and warrants to the Purchaser (which representations and warranties shall survive the Closing Dates) that:

A.    Organization and Corporate Power. The Company is a corporation duly organized, validly existing and in good standing under the laws of the State of Delaware and is qualified to do business in every jurisdiction in which the failure to so qualify would reasonably be expected to have a material adverse effect on the financial condition, operating results or assets of the Company. The Company possesses all requisite corporate power and authority necessary to carry out the transactions contemplated by this Agreement.

(i)    The execution, delivery and performance of this Agreement and the Private Placement Shares have been duly authorized by the Company as of the Closing Dates. This Agreement constitutes a valid and binding obligation of the Company, enforceable in accordance with its terms. Upon issuance in accordance with, and payment pursuant to, the terms of the this Agreement, the Private Placement Shares will constitute valid and binding obligations of the Company, enforceable in accordance with their terms as of the Closing Dates.

(ii)   The execution and delivery by the Company of this Agreement and the Private Placement Shares, the issuance and sale of the Private Placement Shares and the fulfillment of, and compliance with, the respective terms hereof and thereof by the Company, do not and will not as of the Closing Dates (a) conflict with or result in a breach of the terms, conditions or provisions of, (b) constitute a default under, (c) result in the creation of any lien, security interest, charge or encumbrance upon the Company’s capital stock or assets under, (d) result in a violation of, or (e) require any authorization, consent, approval, exemption or other action by or notice or declaration to, or filing with, any court or administrative or governmental body or agency pursuant to the certificate of incorporation or the bylaws of the Company (in effect on the date hereof or as may be amended prior to completion of the contemplated Public Offering), or any material law, statute, rule or regulation to which the Company is subject, or any agreement, order, judgment or decree to which the Company is subject, except for any filings required after the date hereof under federal or state securities laws.

C.    Title to Securities. Upon issuance in accordance with, and payment pursuant to, the terms hereof, the Private Placement Shares will be duly and validly issued, fully paid and nonassessable. Upon issuance in accordance with, and payment pursuant to, the terms hereof, the Purchaser will have good title to the Private Placement Shares, free and clear of all liens, claims and encumbrances of any kind, other than (i) transfer restrictions hereunder and under the other agreements contemplated hereby, (ii) transfer restrictions under federal and state securities laws, and (iii) liens, claims or encumbrances imposed due to the actions of the Purchaser.

D.    Governmental Consents. No permit, consent, approval or authorization of, or declaration to or filing with, any governmental authority is required in connection with the execution, delivery and performance by the Company of this Agreement or the consummation by the Company of any other transactions contemplated hereby.

E.    Regulation D Qualification. Neither the Company nor, to its knowledge, any of its affiliates, officers, directors or beneficial stockholders of 20% or more of its outstanding securities, has experienced a disqualifying event as enumerated pursuant to Rule 506(d) of Regulation D under the Securities Act of 1933, as amended (the “Securities Act”).

Section 3. Representations and Warranties of the Purchaser. As a material inducement to the Company to enter into this Agreement and issue and sell the Private Placement Shares to the Purchaser, the Purchaser hereby represents and warrants to the Company (which representations and warranties shall survive the Closing Dates) that:

A.          Organization and Requisite Authority. The Purchaser possesses all requisite power and authority necessary to carry out the transactions contemplated by this Agreement.

(i)    This Agreement constitutes a valid and binding obligation of the Purchaser, enforceable in accordance with its terms, subject to bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and other laws of general applicability relating to or affecting creditors’ rights and to general equitable principles (whether considered in a proceeding in equity or law).

(ii)    The execution and delivery by the Purchaser of this Agreement and the fulfillment of and compliance with the terms hereof by the Purchaser does not and shall not as of the Closing Dates conflict with or result in a breach by the Purchaser of the terms, conditions or provisions of any agreement, instrument, order, judgment or decree to which the Purchaser is subject.

(i)    The Purchaser is acquiring the Private Placement Shares for the Purchaser’s own account, for investment purposes only and not with a view towards, or for resale in connection with, any public sale or distribution thereof.

(ii)    The Purchaser is an “accredited investor” as such term is defined in Rule 501(a)(3) of Regulation D under the Securities Act and the Purchaser has not experienced a disqualifying event as enumerated pursuant to Rule 506(d) of Regulation D under the Securities Act.

(iii)    The Purchaser understands that the Private Placement Shares are being offered and will be sold to it in reliance on specific exemptions from the registration requirements of the United States federal and state securities laws and that the Company is relying upon the truth and accuracy of, and the Purchaser’s compliance with, the representations and warranties of the Purchaser set forth herein in order to determine the availability of such exemptions and the eligibility of the Purchaser to acquire such Private Placement Shares.

(iv)    The Purchaser did not enter into this Agreement as a result of any general solicitation or general advertising within the meaning of Rule 502(c) under the Securities Act.

(v)    The Purchaser has been furnished with all materials relating to the business, finances and operations of the Company and materials relating to the offer and sale of the Private Placement Shares which have been requested by the Purchaser. The Purchaser has been afforded the opportunity to ask questions of the executive officers and directors of the Company. The Purchaser understands that its investment in the Private Placement Shares involves a high degree of risk and it has sought such accounting, legal and tax advice as it has considered necessary to make an informed investment decision with respect to the acquisition of the Private Placement Shares.

(vi)    The Purchaser understands that no United States federal or state agency or any other government or governmental agency has passed on or made any recommendation or endorsement of the Private Placement Shares or the fairness or suitability of the investment in the Private Placement Shares by the Purchaser nor have such authorities passed upon or endorsed the merits of the offering of the Private Placement Shares.

(vii)   The Purchaser understands that: (a) the Private Placement Shares have not been and are not being registered under the Securities Act or any state securities laws, and may not be offered for sale, sold, assigned or transferred unless (1) subsequently registered thereunder or (2) sold in reliance on an exemption therefrom; and (b) except as specifically set forth in the Registration Rights Agreement, neither the Company nor any other person is under any obligation to register the Private Placement Shares under the Securities Act or any state securities laws or to comply with the terms and conditions of any exemption thereunder.

(viii)   The Purchaser has such knowledge and experience in financial and business matters, knowledge of the high degree of risk associated with investments in the securities of companies in the development stage such as the Company, is capable of evaluating the merits and risks of an investment in the Private Placement Shares and is able to bear the economic risk of an investment in the Private Placement Shares in the amount contemplated hereunder for an indefinite period of time. The Purchaser has adequate means of providing for its current financial needs and contingencies and will have no current or anticipated future needs for liquidity which would be jeopardized by the investment in the Private Placement Shares. The Purchaser can afford a complete loss of its investments in the Private Placement Shares.

Section 4. Conditions of the Purchaser’s Obligations. The obligations of the Purchaser to purchase and pay for the Private Placement Shares are subject to the fulfillment, on or before the Closing Dates, of each of the following conditions:

A.    Representations and Warranties. The representations and warranties of the Company contained in Section 2 shall be true and correct at and as of the Closing Dates as though then made.

B.    Performance. The Company shall have performed and complied with all agreements, obligations and conditions contained in this Agreement that are required to be performed or complied with by it on or before the Closing Dates.

C.    No Injunction. No litigation, statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated or endorsed by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having authority over the matters contemplated hereby, which prohibits the consummation of any of the transactions contemplated by this Agreement or the Warrant Agreement.

D.    Registration Rights Agreement. The Company shall have entered into a Registration Rights Agreement on terms satisfactory to the Purchaser.

Section 5. Conditions of the Company’s Obligations. The obligations of the Company to the Purchaser under this Agreement are subject to the fulfillment, on or before the Closing Dates, of each of the following conditions:

A.    Representations and Warranties. The representations and warranties of the Purchaser contained in Section 3 shall be true and correct at and as of the Closing Dates as though then made.

B.    Performance. The Purchaser shall have performed and complied with all agreements, obligations and conditions contained in this Agreement that are required to be performed or complied with by the Purchaser on or before the Closing Dates.

C.    No Injunction. No litigation, statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated or endorsed by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having authority over the matters contemplated hereby, which prohibits the consummation of any of the transactions contemplated by this Agreement.

Section 6. Termination. This Agreement may be terminated at any time after July 31, 2021 upon the election by either the Company or the Purchaser upon written notice to the other parties if the closing of the Public Offering does not occur prior to such date.

Section 7. Survival of Representations and Warranties. All of the representations and warranties contained herein shall survive the Closing Dates.

Section 8. Definitions. Terms used but not otherwise defined in this Agreement shall have the meaning assigned to such terms in the Registration Statement.

Section 9. Miscellaneous.

A.    Successors and Assigns. Except as otherwise expressly provided herein, all covenants and agreements contained in this Agreement by or on behalf of any of the parties hereto shall bind and inure to the benefit of the respective successors of the parties hereto whether so expressed or not. Notwithstanding the foregoing or anything to the contrary herein, the parties may not assign this Agreement, other than assignments by the Purchaser to affiliates thereof.

B.     Severability. Whenever possible, each provision of this Agreement shall be interpreted in such manner as to be effective and valid under applicable law, but if any provision of this Agreement is held to be prohibited by or invalid under applicable law, such provision shall be ineffective only to the extent of such prohibition or invalidity, without invalidating the remainder of this Agreement.

C.     Counterparts. This Agreement may be executed simultaneously in two or more counterparts, none of which need contain the signatures of more than one party, but all such counterparts taken together shall constitute one and the same agreement.

D.    Descriptive Headings; Interpretation. The descriptive headings of this Agreement are inserted for convenience only and do not constitute a substantive part of this Agreement. The use of the word “including” in this Agreement shall be by way of example rather than by limitation.

E.      Governing Law. This Agreement and the rights and obligations of the parties hereunder shall be construed in accordance with and governed by the laws of New York applicable to contracts wholly performed within the borders of such state, without giving effect to the conflict of law principles thereof. The parties hereto irrevocably submit to the exclusive jurisdiction of any federal court sitting in the Southern District of New York or any state court located in New York County, State of New York, over any suit, action or proceeding arising out of or relating to this Agreement. To the fullest extent they may effectively do so under applicable law, the parties hereto irrevocably waive and agree not to assert, by way of motion, as a defense or otherwise, any claim that they are not subject to the jurisdiction of any such court, any objection that they may now or hereafter have to the laying of the venue of any such suit, action or proceeding brought in any such court and any claim that any such suit, action or proceeding brought in any such court has been brought in an inconvenient forum.

F.       Amendments. This letter agreement may not be amended, modified or waived as to any particular provision, except by a written instrument executed by all parties hereto.

[Signature page follows]

IN WITNESS WHEREOF, the parties hereto have executed this Agreement to be effective as of the date first set forth above.

COMPANY:

[Signature Page to Private Placement Shares Purchase Agreement]