Exhibit 10.1

TRANSACTION SUPPORT AGREEMENT

TRANSACTION SUPPORT AGREEMENT, dated as of March 8, 2026 (this “Agreement”), by and among Plum Acquisition Corp. IV, a Cayman Islands exempted company (which shall transfer by way of continuation and domesticate as a Delaware corporation prior to Closing) (“Purchaser”), and certain of the stockholders of Controlled Thermal Resources Holdings Inc., a Delaware corporation (the “Company”), whose names appear on the signature pages of this Agreement (each, a “Stockholder” and, collectively, the “Stockholders”).

RECITALS

WHEREAS, Purchaser, Plum IV Merger Sub Inc., a Delaware corporation and a direct wholly owned subsidiary of the Purchaser (“Merger Sub”), and the Company have negotiated a Business Combination Agreement in the form attached hereto as Exhibit B (the “BCA”; terms used but not defined in this Agreement shall have the meanings ascribed to them in the BCA), which provides, among other things, that, upon the terms and subject to the conditions thereof, Merger Sub will merge with and into the Company (the “Merger”), with the Company surviving the Merger as a wholly owned subsidiary of Purchaser;

WHEREAS, as of the date hereof, each Stockholder owns of record the number of shares of Company Common Stock as set forth opposite such Stockholder’s name on Exhibit A hereto (all such shares of Company Common Stock and any shares of Company Common Stock of which ownership of record or the power to vote is hereafter acquired by the Stockholders prior to the termination of this Agreement being referred to herein as the “Shares”); and

WHEREAS, as a condition and inducement to the Company’s and Purchaser’s willingness to enter into the BCA and to consummate the transactions contemplated therein, the parties hereto desire to agree to certain matters set forth herein.

AGREEMENT

NOW, THEREFORE, in consideration of the foregoing and of the mutual covenants and agreements contained herein, and intending to be legally bound hereby, the parties hereto hereby agree as follows:

1. BCA Approved; Agreement to Vote. Each Stockholder, with respect to such Stockholder’s Shares, severally and not jointly, at any meeting of the Stockholders of the Company or at any adjournment thereof, and in any action by written consent of the Stockholders of the Company (which written consent shall be delivered promptly after the Company requests such delivery, and in any event within forty eight (48) hours after the Proxy Statement/Registration Statement is declared effective under the Securities Act) or in any other circumstances upon which a vote, consent or other approval with respect to the BCA, the Merger or any other Transaction is sought, hereby agrees (i) that if a meeting is held, such Stockholder will appear at such meeting or otherwise cause its Shares to be counted as present at such meeting for purposes of establishing a quorum, (ii) agrees to vote all of the Shares held by such Stockholder at such time in favor of the approval and adoption of the BCA and approval of the Merger and all other transactions contemplated by the BCA, provided in all cases that no changes have been made in the BCA or in the Merger or related transactions or ancillary agreements under the BCA that are material to one or more of the Stockholders. Provided no changes are made in the BCA or in the Merger or related transactions or ancillary agreements under the BCA that are material to one or more of the Stockholders, each Stockholder, severally and not jointly, hereby agrees to vote at any meeting of the Stockholders of the Company or at any adjournment thereof, and to act by written consent of Company Stockholders or in any other circumstances upon which a vote, consent or other approval with respect to the BCA, the Merger or any other Transaction is sought, against any action, agreement, transaction or proposal that would cause a material breach of any covenant, representation, warranty or other obligation or agreement of the Company under the BCA or that would reasonably be expected, in any material respect, impede, interfere with, delay or attempt to discourage, frustrate the purpose of, or prevent the Merger from being consummated, or that would result in a breach by the Company of, prevent or nullify any provision of the BCA, the Merger or any other Transaction or change in any manner the voting rights of any class of the Company’s share capital. Each Stockholder acknowledges receipt and review of a copy of the BCA.

2. Termination of Stockholder Rights. Subject to consummation of the Closing pursuant to the BCA, each Stockholder, severally and not jointly, hereby agrees that, if applicable to such Stockholder, any rights under any agreement providing for redemption rights, put rights, purchase rights or similar rights not generally available to Stockholders of the Company (the “Terminating Rights”) between such Stockholder and the Company, shall terminate (and such Stockholder, without any further action, shall automatically and irrevocably release and waive any claim such Stockholder may have thereunder) immediately prior to the Closing under the BCA, and prior thereto such Stockholder shall not exercise such rights in any manner inconsistent with the BCA or otherwise reasonably likely to interfere with, delay, impede, frustrate or prevent the consummation of the Merger. For the avoidance of doubt, the Terminating Rights shall exclude any rights such Stockholder may have that relate to any commercial or employment agreements or arrangements between such Stockholder and the Company or any subsidiary of the Company, which shall survive in accordance with their terms.

3. Transfer of Shares. Each Stockholder, severally and not jointly, agrees that he, she or it shall not, directly or indirectly, (a) sell, assign, grant, transfer (including by gift, tender or exchange offer, merger or operation of law), create any lien or pledge, dispose of or otherwise encumber, hedge or utilize a derivative to transfer the economic interest in or enter into any Contract, option or other arrangement (including any profit sharing arrangement with respect to any of the foregoing of, or establish or increase a put equivalent position or liquidate or decrease a call equivalent position within the meaning of Section 16 of the Exchange Act, and the rules or regulations of the SEC promulgated thereunder, with respect to any of the Shares or otherwise agree to do any of the foregoing, except for a sale, assignment or transfer pursuant to the BCA or to another Stockholder of the Company that is a party to this Agreement and bound by the terms and obligations hereof, (b) deposit any Shares into a voting trust or enter into a voting agreement or arrangement or grant any proxy or power of attorney with respect thereto that is inconsistent with this Agreement; (c) enter into any contract, option or other arrangement or undertaking with respect to the direct acquisition or sale, assignment, transfer or other disposition of any Shares, except as set forth in the BCA or this Agreement; (d) publicly announce any intention to effect any transaction specified in clause (a) through (c), other than pursuant to the Merger; (e) take any action that would make any representation or warranty of such Shareholder herein untrue or incorrect, or have the effect of preventing or disabling such Shareholder herein untrue or incorrect or have the effect of preventing or disabling such Shareholder from performing its obligations hereunder; or (f) commit or agree to take any of the foregoing actions or take any other action or enter into any Contract that would reasonably be expected to make any of its representations and warrants contained herein untrue or incorrect or would have the effect of preventing or delaying such Shareholder from performing any of its obligations hereunder; provided, that the foregoing shall not prohibit the transfer of the Shares to an affiliate of Stockholder, but only if such affiliate of such Stockholder shall execute this Agreement or a joinder agreeing to become a party to this Agreement.

4. No Solicitation of Transactions. Each of the Stockholders, severally and not jointly, agrees not to directly or indirectly, through any officer, director, representative, agent or otherwise, (a) solicit, initiate or knowingly encourage (including by furnishing information) the submission of, or participate in any discussions or negotiations regarding, any transaction in violation of the BCA or (b) participate in any discussions or negotiations regarding, or furnish to any person or other entity or “group” within the meaning of Section 13(d) of the Exchange Act, any information with the intent to, or otherwise cooperate in any way with respect to, or knowingly assist, participate in, facilitate or encourage, any unsolicited proposal that constitutes, or may reasonably be expected to lead to, an Alternative Transaction in violation of the BCA. Each Stockholder shall, and shall direct his, her or its representatives and agents to, immediately cease and cause to be terminated any discussions or negotiations with any parties that may be ongoing with respect to any Alternative Transaction (other than the transactions contemplated by the BCA) to the extent required by the BCA. If any Stockholder receives any inquiry or proposal with respect to an Alternative Transaction, then such Stockholder shall promptly (and in no event later than twenty-four (24) hours after such Stockholder becomes aware of such inquiry or proposal) notify such person in writing that the Company is subject to an exclusivity agreement with respect to the sale of the Company that prohibits such Stockholder from considering such inquiry or proposal.

5. Waiver of Dissenters’ Rights. Each of the Stockholders, severally and jointly, hereby irrevocably waives, and agrees not to exercise or assert, any dissenters’ rights under the DGCL and any other similar statute in connection with the Merger and the BCA.

6. New Shares. In the event that prior to the Merger (i) any Company shares or other securities are issued or otherwise distributed to a Stockholder pursuant to any stock dividend or distribution, or any change in the share capital of the Company by reason of any stock split-up, recapitalization, combination, exchange of shares or the like, (ii) a Stockholder acquires legal or beneficial ownership of any Company shares after the date of this Agreement, or (iii) a Stockholder acquires the right to vote or share in the voting of any Company shares after the date of this Agreement (together, the “New Securities”), the terms “Shares” shall be deemed to refer to and include such New Securities (including all such stock dividends and distributions and any securities into which or for which any or all of the Shares may be changed or exchanged into.

4.  Representations and Warranties. Each Stockholder, severally and not jointly, represents and warrants to Purchaser as follows:

(a) The execution, delivery and performance by such Stockholder of this Agreement and the consummation by such Stockholder of the transactions contemplated hereby do not and will not (i) conflict with or violate any statute, law, ordinance, regulation, rule, code, executive order, injunction, judgment, decree or other order applicable to such Stockholder, (ii) require any consent, approval or authorization of, declaration, filing or registration with, or notice to, any person or entity, (iii) result in the creation of any encumbrance on any Shares (other than under this Agreement, the BCA and the agreements contemplated by the BCA) or (iv) if such Stockholder is an entity, conflict with or result in a breach of or constitute a default under any provision of such Stockholder’s governing documents.

(b) As of the date of this Agreement, such Stockholder owns exclusively of record and has good and valid title to the Shares set forth opposite the Stockholder’s name on Exhibit A free and clear of any security interest, lien, claim, pledge, proxy, option, right of first refusal, agreement, voting restriction, limitation on disposition, charge, adverse claim of ownership or use or other encumbrance of any kind and has the sole power to vote and the right, power and authority to sell, transfer and deliver such Shares, other than pursuant and subject to: (i) this Agreement, (ii) applicable securities laws, and (iii) the Company’s certificate of incorporation and bylaws. Such Stockholder is not the registered owner of any Shares other than those set forth on Exhibit A.

(c) Such Stockholder has the power, authority and capacity to execute, deliver and perform this Agreement. This Agreement has been duly authorized, executed and delivered by such Stockholder. No person not a signatory to this Agreement (or such signatory’s spouse for purposes of applicable community property laws) has a beneficial interest in or a right to acquire or vote any of the Shares (other than, if Stockholder is a trust, the beneficiary(ies) thereof).

5. Termination. This Agreement and the obligations and liabilities of the Stockholders under this Agreement shall automatically terminate upon the earliest of (a) the Effective Time; (b) the termination of the BCA in accordance with its terms, (c) the effective date of a written agreement of the parties hereto terminating this Agreement, and (d) any material breach by Purchaser of the BCA that is not fully cured within the time permitted by the BCA. Upon termination of this Agreement, neither party shall have any further obligations or liabilities under this Agreement. The representations and warranties contained in this Agreement and in any certificate or other writing delivered pursuant hereto shall not survive the Closing or the termination of this Agreement.

6. Miscellaneous.

(a) Except as otherwise provided herein, all costs and expenses incurred in connection with this Agreement and the transactions contemplated hereby shall be paid by the party incurring such costs and expenses, whether or not the transactions contemplated hereby are consummated.

(b) All notices, requests, claims, demands and other communications hereunder shall be in writing and shall be given (and shall be deemed to have been duly given upon receipt) by delivery in person, by e-mail or by registered or certified mail (postage prepaid, return receipt requested) to the respective parties at the following addresses or e-mail addresses (or at such other address or email address for a party as shall be specified in a notice given in accordance with this Section 6(b)):

If to Purchaser, to:

Plum Acquisition Corp. IV 2021
Fillmore St. #2089

San Francisco, California 94115
Attn: Steven Handwerker

Email: steven@plumpartners.com

with a copy (which shall not constitute notice) to:

Greenberg Traurig LLP
One Vanderbilt Avenue
New York, NY 10017

Attn: Alan Annex; Adam Namoury

Email: Alan.Annex; Adam.Namoury@gtlaw.com

If to a Stockholder, to the address or email address set forth for such Stockholder on the signature page hereof.

(c) If any term or other provision of this Agreement is invalid, illegal or incapable of being enforced by any rule of law, or public policy, all other conditions and provisions of this Agreement shall nevertheless remain in full force and effect so long as the economic or legal substance of the transactions contemplated hereby is not affected in any manner materially adverse to any party. Upon such determination that any term or other provision is invalid, illegal or incapable of being enforced, the parties hereto shall negotiate in good faith to modify this Agreement so as to effect the original intent of the parties as closely as possible in a mutually acceptable manner in order that the transactions contemplated hereby be consummated as originally contemplated to the fullest extent possible.

(d) This Agreement constitutes the entire agreement among the parties with respect to the subject matter hereof and supersedes all prior agreements and undertakings, both written and oral, among the parties, or any of them, with respect to the subject matter hereof. This Agreement shall not be assigned (whether pursuant to a merger, by operation of law or otherwise), by any party without the prior express written consent of the other parties hereto except as permitted by Section 3.

(e) This Agreement shall be binding upon and inure solely to the benefit of each party hereto, and nothing in this Agreement, express or implied, is intended to or shall confer upon any other person any right, benefit or remedy of any nature whatsoever under or by reason of this Agreement. No Stockholder shall be liable for the breach by any other Stockholder of this Agreement.

(f) The parties hereto agree that irreparable damage would occur in the event any provision of this Agreement was not performed in accordance with the terms hereof and that the parties shall be entitled to specific performance of the terms hereof in addition to any other remedy at law or in equity.

(g) This Agreement shall be governed by, and construed in accordance with, the laws of the State of Delaware applicable to contracts executed in and to be performed in that State. All Actions arising out of or relating to this Agreement shall be heard and determined exclusively in any Delaware Chancery Court. The parties hereto hereby (i) submit to the exclusive jurisdiction of the Delaware Chancery Court for the purpose of any Action arising out of or relating to this Agreement brought by any party hereto, and (ii) irrevocably waive, and agree not to assert by way of motion, defense, or otherwise, in any such Action, any claim that he, she or it is not subject personally to the jurisdiction of the above-named courts, that his, her or its property is exempt or immune from attachment or execution, that the Action is brought in an inconvenient forum, that the venue of the Action is improper, or that this Agreement or the transactions contemplated hereunder may not be enforced in or by any of the above-named courts.

(h) This Agreement may be executed and delivered (including by email, DocuSign or portable document format (pdf) transmission) in counterparts, and by the different parties hereto in separate counterparts, each of which when executed shall be deemed to be an original but all of which taken together shall constitute one and the same agreement.

(i) At the request of Purchaser, in the case of any Stockholder, or at the request of any Stockholder, in the case of Purchaser, and without further consideration, each party shall execute and deliver or cause to be executed and delivered such additional documents and instruments and take such further action as may be reasonably necessary to implement the provisions of this Agreement.

(j) Notwithstanding anything to the contrary herein, this Agreement may be amended by adding additional Stockholders of the Company (“Additional Stockholders”) as parties hereto, upon such Additional Stockholders executing and delivering to Purchaser, a Joinder to the Transaction Support Agreement substantially in the form of Exhibit C hereto. Thereafter, each such Additional Stockholder shall, for all purposes, be a party hereto and all references to a “Stockholder” or the “Stockholders” herein shall thereafter also mean and refer to such Additional Stockholder, and such Additional Stockholder shall thereafter have the same rights, duties, liabilities and obligations as a Stockholder party hereto on the date hereof.

(k) This Agreement shall not be effective or binding upon any Stockholder until after such time as the BCA is executed and delivered by the Company, Purchaser and Merger Sub.

(l) EACH OF THE PARTIES HERETO HEREBY WAIVES TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW ANY RIGHT HE, SHE OR IT MAY HAVE TO A TRIAL BY JURY WITH RESPECT TO ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AGREEMENT. EACH OF THE PARTIES HERETO (I) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND (II) ACKNOWLEDGES THAT HE, SHE OR IT AND THE OTHER PARTIES HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AGREEMENT AND THE TRANSACTIONS CONTEMPLATED HEREBY, AS APPLICABLE, BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 6(L).

[Signature Pages Follow]

IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written above.

{Signature Page to Trasaction Support Agreement}

IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written above.