Engagement Letter between FibroBiologics, Inc. and Maxim Group LLC dated April 24, 2023

Exhibit 10.23

CONFIDENTIAL

April 24, 2023

Mr. Peter O’Heeron

Chairman & CEO

FibroBiologics, Inc.

455 E. Medical Center Blvd, Suite 300

Houston, TX 77598

Dear Mr. O’Heeron:

We are pleased that FibroBiologics, Inc., a Delaware corporation (the “Company”) has decided to retain Maxim Group LLC (“Maxim”) to provide general financial advisory and investment banking services to the Company as set forth herein. This letter agreement (“Agreement”) will confirm Maxim’s acceptance of such retention and set forth the terms of our engagement.

1. Retention. The Company hereby retains Maxim as its financial advisor and investment banker to provide general financial advisory and investment banking services, and Maxim accepts such retention on the terms and conditions set forth in this Agreement. In connection with this Agreement, Maxim may provide certain or all of the following services (collectively referred to as the “Advisory Services”):

(a) assist management of the Company and advise the Company with respect to its strategic planning process and business plans including an analysis of markets, positioning, financial models, organizational structure, potential strategic alliances and capital requirements;

(b) advise the Company on matters relating to a direct listing to a major U.S. exchange, initial public offering, SPAC business combination, reverse merger into a public company or other transaction that results in the Company’s listing on a major U.S. exchange (each, a “Go-Public Transaction”);

(c) assist the Company in the preparation of a registration statement and coordinate applicable corporate finance applications with the Financial Regulatory Authority in the event of a direct listing;

(d) Coordinate with the Company’s chosen U.S. national securities exchange in relation to informing such exchange as to the readiness of the Company’s shares to trade and other matters related to a direct listing.

(e) Advise and assist the Company in informing its shareholders through investor education and investor day events in the case of a direct listing;

(f) advise the Company on potential financing alternatives, including facilitation and negotiation of any financial or structural aspects of such alternatives; and

(g) provide such other financial advisory and investment banking services upon which the parties may mutually agree.

It is expressly understood and agreed that Maxim shall be required to perform only such tasks as may be necessary or desirable in connection with the rendering of its services hereunder and therefore may not perform all of the tasks enumerated above during the term of this Agreement. Moreover, it is further understood that Maxim need not perform each of the above-referenced tasks in order to receive the consideration described in Section 3. It is further understood that Maxim’s tasks may not be limited to those enumerated in this paragraph.

2. Information. In connection with Maxim’s activities hereunder, the Company will cooperate with Maxim and furnish Maxim upon request with all information regarding the business, operations, properties, financial condition, management and prospects of the Company (all such information so furnished being the “Information”) which Maxim deems appropriate and will provide Maxim with access to the Company’s officers, directors, employees, independent accountants and legal counsel. The Company represents and warrants to Maxim that all Information made available to Maxim hereunder will be complete and correct in all material respects and will not contain any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein not misleading in light of the circumstances under which such statements are or will be made. The Company further represents and warrants that any projections and other forward-looking information provided by it to Maxim will have been prepared in good faith and will be based upon assumptions which, in light of the circumstances under which they are made, are reasonable. The Company recognizes and confirms that Maxim: (i) will use and rely primarily on the Information and on information available from generally recognized public sources in performing the services contemplated by this Agreement without having independently verified the same; (ii) does not assume responsibility for the accuracy or completeness of the Information and such other information; and (iii) will not make an appraisal of any assets of the Company. Any advice rendered by Maxim pursuant to this Agreement may not be disclosed publicly without Maxim’s prior written consent. Maxim hereby acknowledges that certain of the Information received by Maxim may be confidential and/or proprietary, including Information with respect to the Company’s technologies, products, business plans, marketing, and other Information which must be maintained by Maxim as confidential. Maxim further agrees that it will not disclose such confidential and/or proprietary Information to any other companies in the industry in which the Company is involved. The obligations in this Section 2 to maintain Information as confidential shall survive the termination or expiration of this Agreement for a period of one (1) year.

3. Consideration. As consideration for Maxim’s services pursuant to this Agreement, Maxim shall be entitled to receive, and the Company agrees to pay Maxim, the following compensation:

4. Expenses. In addition to payment to Maxim of the compensation set forth in Section 3 hereof, the Company shall promptly upon request from time to time reimburse Maxim for all reasonable, documented expenses (including, without limitation, fees and disbursements of counsel and all travel and other out-of-pocket expenses) incurred by Maxim in connection with its engagement hereunder. Maxim will provide the Company an invoice and copies of receipts pursuant to its expenses and such expenses shall not exceed $5,000 without prior authorization of the Company; provided that the foregoing limitation and consent shall not apply to legal fees less than $10,000.

5. Indemnification. The Company agrees to indemnify Maxim in accordance with the indemnification and other provisions attached to this Agreement as Exhibit A (the “Indemnification Provisions”), which provisions are incorporated herein by reference and shall survive the termination or expiration of this Agreement.

6. Future Rights. As additional consideration for its services hereunder and as an inducement to cause Maxim to enter into this Agreement, for a period of nine (9) months from the consummation of a Go-Public Transaction that occurs during the term of this Agreement, if the Company proposes to effect a public offering of its securities on a major U.S. exchange, private placement of securities or other Financing, or the Company proposes to enter into a Transaction, the Company shall offer to retain Maxim as its lead underwriter and book running manager , its lead placement or sales agent, or its lead advisor(lead, but not exclusive, advisorwith at least 70% economics to lead and up to 30% to others), as applicable, in connection with such Financing or Transaction, upon such reasonable and customary terms as the parties may mutually agree, such terms to be set forth in a separate engagement letter or other agreement between the parties. This right shall not apply if the Company terminates Maxim for Cause as that term is defined below. Such offer shall be made in writing in order to be effective. The Company shall not offer to retain any other investment banking firm in connection with any such offering or Financing, on terms more favorable than those discussed with Maxim without offering to retain Maxim on such more favorable terms. Maxim shall notify the Company within 5 days of its receipt of the written offer contemplated above as to whether or not it agrees to accept such retention. If Maxim should decline such retention, the Company shall have no further obligations to Maxim, except as specifically provided for herein.

7. Other Activities. The Company acknowledges that Maxim has been, and may in the future be, engaged to provide services as an underwriter, placement agent, finder, advisor and investment banker to other companies in the industry in which the Company is involved. Subject to the confidentiality provisions of Maxim contained in Section 2 hereof, the Company acknowledges and agrees that nothing contained in this Agreement shall limit or restrict the right of Maxim or of any member, manager, officer, employee, agent or representative of Maxim, to be a member, manager, partner, officer, director, employee, agent or representative of, investor in, or to engage in, any other business, whether or not of a similar nature to the Company’s business, nor to limit or restrict the right of Maxim to render services of any kind to any other corporation, firm, individual or association. Maxim may, but shall not be required to, present opportunities to the Company.

8. No Short Selling. Maxim represents and warrants to the Company that Maxim has and shall not during the term of this Agreement, directly or indirectly, itself or through or for related parties or affiliates, (i) sell “short” or “short against the box” (as those terms are generally understood) any equity security of the Company or (ii) otherwise engage in any transaction that involves hedging of Maxim’s position in any equity security of the Company.

9. Term and Termination; Survival of Provisions. Either Maxim or the Company may terminate this Agreement at any time upon thirty (30) days’ prior written notice to the other party after the five (5) month anniversary of this Agreement, unless earlier terminated for Cause. Pursuant to this Agreement, “Cause” shall mean gross negligence, willful misconduct or an uncured material breach of this Agreement by Maxim of which the Company has provided Maxim with reasonable notice and opportunity to cure. Notwithstanding anything expressed or implied herein to the contrary: (i) any other agreement entered into between Maxim and the Company may only be terminated in accordance with the terms thereof, notwithstanding an actual or purported termination of this Agreement, and (ii) the terms and provisions of Sections 2, 3(b), (including, but not limited to, the Indemnification Provisions attached to this Agreement and incorporated herein by reference), 6, 9, 10, 11, 12, 14, 16 and 18 shall survive the termination of this Agreement.-With respect to Sections 3(a) and 4, only the Consideration earned and the Expenses incurred up to the point of Termination shall be due to Maxim from the Company. With respect to Section 6, Future Rights will only survive Termination if a Go Public Transaction was consummated during the term of the Agreement and the Agreement has not been terminated for Cause.

10. Notices. All notices will be in writing and will be effective when delivered in person or sent via U.S. Mail or private carrier or via facsimile and confirmed by letter, to the party to whom it is addressed at the following addresses or such other address as such party may advise the other in writing:

455 E. Medical Center Blvd, Suite 300

Houston, TX 77598

Attention: Mr. Peter O’Heeron

Telephone: (281) 671-5150

Maxim Group LLC

300 Park Avenue

New York, NY 10022

Telephone: (212) 895-3508

Facsimile: (212) 895-3888

Mr. Clifford Teller

Maxim Group LLC

300 Park Avenue

New York, NY 10022

11. Governing Law; Arbitration. This Agreement shall be enforced, governed by and construed in accordance with the laws of New York without regard to principles of conflict of laws. Any controversy between the parties to this Agreement, or arising out of the Agreement, shall be resolved by arbitration before the American Arbitration Association (“AAA”) in New York City. The following arbitration agreement should be read in conjunction with these disclosures:

ARBITRATION AGREEMENT. ANY AND ALL CONTROVERSIES, DISPUTES OR CLAIMS BETWEEN MAXIM AND YOU OR YOUR AGENTS, REPRESENTATIVES, EMPLOYEES, DIRECTORS, OFFICERS OR CONTROL PERSONS, ARISING OUT OF, IN CONNECTION WITH, OR WITH RESPECT TO (a) ANY PROVISIONS OF OR THE VALIDITY OF THIS AGREEMENT OR ANY RELATED AGREEMENTS, (b) THE RELATIONSHIP OF THE PARTIES HERETO, OR (c) ANY CONTROVERSY ARISING OUT OF YOUR BUSINESS SHALL BE CONDUCTED BY THE AMERICAN ARBITRATION ASSOCIATION UNDER ITS COMMERCIAL ARBITRATION RULES. ARBITRATION MUST BE COMMENCED BY SERVICE OF A WRITTEN DEMAND FOR ARBITRATION OR A WRITTEN NOTICE OF INTENTION TO ARBITRATE. IF YOU ARE A PARTY TO SUCH ARBITRATION, TO THE EXTENT PERMITTED BY THE RULES OF THE APPLICABLE ARBITRATION TRIBUNAL, THE ARBITRATION SHALL BE CONDUCTED IN NEW YORK, NEW YORK. THE DECISION AND AWARD OF THE ARBITRATORS(S) SHALL BE CONCLUSIVE AND BINDING UPON ALL PARTIES, AND ANY JUDGMENT UPON ANY AWARD RENDERED MAY BE ENTERED IN THE STATE OR FEDERAL COURTS LOCATED IN NEW YORK, NEW YORK, OR ANY OTHER COURT HAVING JURISDICTION THEREOF, AND NEITHER PARTY SHALL OPPOSE SUCH ENTRY.

12. Amendments. This Agreement may not be modified or amended except in a writing duly executed by the parties hereto.

13. Headings. The section headings in this Agreement have been inserted as a matter of reference and are not part of this Agreement.

14. Successors and Assigns. The benefits of this Agreement shall inure to the parties hereto, their respective successors and assigns and to the indemnified parties hereunder and their respective successors and assigns, and the obligations and liabilities assumed in this Agreement shall be binding upon the parties hereto and their respective successors and assigns. Notwithstanding anything contained herein to the contrary, neither Maxim nor the Company shall assign any of its obligations hereunder without the prior written consent of the other party.

15. No Third Party Beneficiaries. This Agreement does not create, and shall not be construed as creating, any rights enforceable by any person or entity not a party hereto, except those entitled to the benefits of the Indemnification Provisions. Without limiting the foregoing, the Company acknowledges and agrees that Maxim is not being engaged as, and shall not be deemed to be, an agent or fiduciary of the Company’s stockholders or creditors or any other person by virtue of this Agreement or the retention of Maxim hereunder.

16. Waiver. Any waiver or any breach of any of the terms or conditions of this Agreement shall not operate as a waiver of any other breach of such terms or conditions or of any other term or condition, nor shall any failure to insist upon strict performance or to enforce any provision hereof on any one occasion operate as a waiver of such provision or of any other provision hereof or a waiver of the right to insist upon strict performance or to enforce such provision or any other provision on any subsequent occasion. Any waiver must be in writing.

17. Counterparts. This Agreement may be executed in any number of counterparts and by facsimile transmission, each of which shall be deemed to be an original instrument, but all of which taken together shall constitute one and the same agreement. Facsimile signatures shall be deemed to be original signatures for all purposes.

18. Disclaimers. The Company agrees that any and all decisions, acts, actions, or omissions with respect to the services contemplated by this Agreement and the other matters contemplated herein shall be the sole responsibility of the Company, and that the performance by Maxim of services hereunder will in no way expose Maxim to any liability for any such decisions, acts, actions or omissions of the Company.

If the terms of our engagement as set forth in this letter are satisfactory to you, please confirm by signing and returning one copy of this letter.

Very truly yours,

MAXIM GROUP LLC

Agreed to and accepted this 24th day of April, 2023

FIBROBIOLOGICS, INC.

Exhibit A

INDEMNIFICATION PROVISIONS

Capitalized terms used in this Exhibit shall have the meanings ascribed to such terms in the Agreement to which this Exhibit is attached.

The Company agrees to indemnify and hold harmless Maxim and each of the other Indemnified Parties (as hereinafter defined) from and against any and all losses, claims, damages, obligations, penalties, judgments, awards, liabilities, costs, expenses and disbursements, and any and all actions, suits, proceedings and investigations in respect thereof and any and all legal and other costs, expenses and disbursements in giving testimony or furnishing documents in response to a subpoena or otherwise (including, without limitation, the costs, expenses and disbursements, as and when incurred, of investigating, preparing, pursing or defending any such action, suit, proceeding or investigation (whether or not in connection with litigation in which any Indemnified Party is a party)) (collectively, “Losses”), directly or indirectly, caused by, relating to, based upon, arising out of, or in connection with, Maxim’s acting for the Company, including, without limitation, any act or omission by Maxim in connection with its acceptance of or the performance or non-performance of its obligations under the Agreement between the Company and Maxim to which these indemnification provisions are attached and form a part (the “Agreement”), any breach by the Company of any representation, warranty, covenant or agreement contained in the Agreement (or in any instrument, document or agreement relating thereto, including any agency agreement), or the enforcement by Maxim of its rights under the Agreement or these indemnification provisions, except to the extent that any such Losses are found in a final judgment by a court of competent jurisdiction (not subject to further appeal) to have resulted primarily and directly from the gross negligence or willful misconduct of the Indemnified Party seeking indemnification hereunder. The Company also agrees that no Indemnified Party shall have any liability (whether direct or indirect, in contract or tort or otherwise) to the Company for or in connection with the engagement of Maxim by the Company or for any other reason, except to the extent that any such liability is found in a final judgment by a court of competent jurisdiction (not subject to further appeal) to have resulted primarily and directly from such Indemnified Party’s gross negligence or willful misconduct.

These Indemnification Provisions shall extend to the following persons (collectively, the “Indemnified Parties”): Maxim, its present and former affiliated entities, managers, members, officers, employees, legal counsel, agents and controlling persons (within the meaning of the federal securities laws), and the officers, directors, partners, stockholders, members, managers, employees, legal counsel, agents and controlling persons of any of them. These indemnification provisions shall be in addition to any liability which the Company may otherwise have to any Indemnified Party.

If any action, suit, proceeding or investigation is commenced, as to which an Indemnified Party proposes to demand indemnification, it shall notify the Company with reasonable promptness; provided, however, that any failure by an Indemnified Party to notify the Company shall not relieve the Company from its obligations hereunder. An Indemnified Party shall have the right to retain counsel of its own choice to represent it, and the fees, expenses and disbursements of such counsel shall be borne by the Company. Any such counsel shall, to the extent consistent with its professional responsibilities, cooperate with the Company and any counsel designated by the Company. The Company shall be liable for any settlement of any claim against any Indemnified Party made with the Company’s written consent. The Company shall not, without the prior written consent of Maxim, settle or compromise any claim, or permit a default or consent to the entry of any judgment in respect thereof, unless such settlement, compromise or consent (i) includes, as an unconditional term thereof, the giving by the claimant to all of the Indemnified Parties of an unconditional release from all liability in respect of such claim, and (ii) does not contain any factual or legal admission by or with respect to an Indemnified Party or an adverse statement with respect to the character, professionalism, expertise or reputation of any Indemnified Party or any action or inaction of any Indemnified Party.

In order to provide for just and equitable contribution, if a claim for indemnification pursuant to these indemnification provisions is made but it is found in a final judgment by a court of competent jurisdiction (not subject to further appeal) that such indemnification may not be enforced in such case, even though the express provisions hereof provide for indemnification in such case, then the Company shall contribute to the Losses to which any Indemnified Party may be subject (i) in accordance with the relative benefits received by the Company and its stockholders, subsidiaries and affiliates, on the one hand, and the Indemnified Party, on the other hand, and (ii) if (and only if) the allocation provided in clause (i) of this sentence is not permitted by applicable law, in such proportion as to reflect not only the relative benefits, but also the relative fault of the Company, on the one hand, and the Indemnified Party, on the other hand, in connection with the statements, acts or omissions which resulted in such Losses as well as any relevant equitable considerations. No person found liable for a fraudulent misrepresentation shall be entitled to contribution from any person who is not also found liable for fraudulent misrepresentation. The relative benefits received (or anticipated to be received) by the Company and it stockholders, subsidiaries and affiliates shall be deemed to be equal to the aggregate consideration payable or receivable by such parties in connection with the transaction or transactions to which the Agreement relates relative to the amount of fees actually received by Maxim in connection with such transaction or transactions. Notwithstanding the foregoing, in no event shall the amount contributed by all Indemnified Parties exceed the amount of fees previously received by Maxim pursuant to the Agreement.

Neither termination nor completion of the Agreement shall affect these Indemnification Provisions which shall remain operative and in full force and effect. The Indemnification Provisions shall be binding upon the Company and its successors and assigns and shall inure to the benefit of the Indemnified Parties and their respective successors, assigns, heirs and personal representatives.

Exhibit B

FEE SCHEDULE

Capitalized terms used in this Exhibit shall have the meanings ascribed to such terms in the Agreement to which this Exhibit is attached.

1. Initial Public Offering or Go-Public Transaction Financing or a Financing pursuant to Section 3(b) (other than a Direct Listing):

For any Go-Public Transaction that is a direct listing, the Company shall owe to Maxim an advisory fee of $200,000 upon consummation of such direct listing, and this amount shall be paid to Maxim upon completion of an offering.

The Company shall pay to Maxim in cash at the closing or closings of any Transaction a fee equal to two percent (2.0%) of Transaction Consideration as defined below. The amount of “Consideration” shall include, for purposes of calculating such fee, all forms of consideration paid or received, directly or indirectly, by the Company and/or its stockholders in such Transaction, including, without limitation, cash, securities, notes or other evidences of indebtedness, assumption of liabilities (whether by operation of law or otherwise), or any combination thereof. If all or portion of the consideration paid in the Transaction is other than cash or securities, then the value of such non-cash consideration shall be the fair market value thereof on the date the Transaction is consummated as mutually agreed upon in good faith by the Company and Maxim. If such non-cash consideration consists of common stock, options, warrants or rights for which a public trading market existed prior to the consummation for the Transaction, then the value of such securities shall be determined based upon the closing or last sales price thereof on the date of the consummation of the Transaction. If such non-cash consideration consists of newly-issued, publicly-traded common stock, options, warrants or rights for which no public trading market existed prior to the consummation of the Transaction, then the value thereof shall be the average of the closing prices for the twenty (20) trading days subsequent to the fifth trading day after the consummation of the Transaction. In such event, the fee payable to Maxim pursuant to this Section 3 shall be paid on the thirtieth (30^th) trading day subsequent to consummation of the Transaction. If no public market exists for the common stock, options, warrants or other rights issued in the Transaction, then the value thereof shall be as mutually agreed upon in good faith by the Company and Maxim. If the non-cash consideration paid in the Transaction consists of preferred stock or debt securities (regardless of whether a public trading market existed for such preferred stock or debt securities prior to consummation of the Transaction or exists thereafter), the value thereof shall be the maximum liquidation value (without regard to accrued dividends) of the preferred stock or the principal amount of the debt securities, as the case may be. Any amounts payable by a purchaser to the Company, any stockholder of the Company or an affiliate of either the Company or any stockholder of the Company in connection with a non-competition, employment, consulting, licensing, supply or other agreement (or payable by the Company if the Company is the acquiring entity) shall be deemed to be part of the consideration paid in the Transaction. If all or a portion of the consideration payable in connection with the Transaction includes contingent future payments, then the Company shall pay to Maxim an additional cash fee, determined in accordance with this Section 3, as, when and if such contingency payments are received. However, in the event of an installment purchase at a fixed price and fixed time schedule, the Company agrees to pay Maxim, upon consummation of such Transaction, an additional cash fee, determined in accordance with this Section 3 based upon the present value of such installment payments using a discount rate of ten percent (10%). If with respect to any non-cash consideration the Company and Maxim are unable to agree on the fair market value thereof, then such value shall be determined by submission of the question to a reputable appraisal firm with experience valuing property of the nature of the subject consideration acceptable to the Company and Maxim (the fees and expenses of whom shall be borne equally by the Company and Maxim).