Exhibit 10.1

AMENDMENT NO. 1 TO INVESTMENT MANAGEMENT TRUST AGREEMENT

THIS AMENDMENT NO. 1 TO THE INVESTMENT MANAGEMENT TRUST AGREEMENT (this “Amendment”) is made as of March 8, 2023, by and between Vector Acquisition Corporation II, a Cayman Islands exempted company (the “Company”), and Continental Stock Transfer & Trust Company, a New York corporation (the “Trustee”). Capitalized terms contained in this Amendment, but not specifically defined in this Amendment, shall have the meanings ascribed to such terms in the Original Agreement (as defined below).

WHEREAS, on March 12, 2021, the Company consummated an initial public offering (the “Offering”) of Class A ordinary shares, par value $0.0001 per share, of the Company (“Ordinary Shares”);

WHEREAS, $450,000,000 of the net proceeds of the Offering and sale of the Private Placement Shares (as defined in the Underwriting Agreement) were delivered to the Trustee to be deposited and held in the segregated Trust Account located in the United States for the benefit of the Company and the holders of Ordinary Shares issued in the Offering pursuant to the investment management trust agreement made effective as of March 9, 2021, by and between the Company and the Trustee (the “Original Agreement”);

WHEREAS, the Company has sought the approval of the holders of its Ordinary Shares and holders of its Class B ordinary shares, par value $0.0001 per share (the “Class B Ordinary Shares”), at an annual general meeting to: (i) extend the date before which the Company must complete a business combination from March 12, 2023 to March 12, 2024 or such earlier date as is determined by our Board to be in the best interests of the Company (the “Extension Amendment”) and (ii) extend the date on which the Trustee must liquidate the Trust Account if the Company has not completed its initial business combination from March 12, 2023 to March 12, 2024 or such earlier date as is determined by our Board to be in the best interests of the Company (the “Trust Amendment”);

WHEREAS, holders of at least sixty-five percent (65%) of the then issued and outstanding Ordinary Shares and Class B Ordinary Shares, voting together as a single class, approved the Trust Amendment;

WHEREAS, holders of at least one-third of the then issued and outstanding ordinary shares who, being present and entitled to vote at an annual general meeting, voted at the annual general meeting; and

WHEREAS, the parties desire to amend the Original Agreement to, among other things, reflect amendments to the Original Agreement contemplated by the Trust Amendment.

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

1. Amendment to Trust Agreement. Section 1(i) of the Original Agreement is hereby amended and restated in its entirety as follows:

“(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 (“Termination Letter”) in a form substantially similar to that attached hereto as either Exhibit A or Exhibit B signed on behalf of the Company by its Chief Executive Officer, Chief Financial Officer or other authorized officer of the Company, and complete the liquidation of the Trust Account and distribute the Property in the Trust Account, including interest (which interest shall be net of any taxes payable and less up to $100,000 of interest that may be released to the Company to pay dissolution expenses, it being understood that the Trustee has no obligation to monitor or question the Company’s position that an allocation has been made for taxes payable), only as directed in the Termination Letter and the other documents referred to therein; provided that, in the case a Termination Letter in the form of Exhibit A is received, or (y) upon March 12, 2024 or such earlier date as is determined by our Board to be in the best interests of the Company, 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 (which interest shall be net of any taxes payable and less up to $100,000 of interest that may be released to the Company to pay dissolution expenses), shall be distributed to the Public Shareholders of record as of such date; provided, however, that in the event the Trustee receives a Termination Letter in a form substantially similar to Exhibit B hereto, or if the Trustee begins to liquidate the Property because it has received no such Termination Letter by March 12, 2024 or such earlier date as is determined by our Board to be in the best interests of the Company, the Trustee shall keep the Trust Account open until twelve (12) months following the date the Property has been distributed to the Public Shareholders;”.

2. Miscellaneous Provisions.

2.1. Successors. All the covenants and provisions of this Amendment by or for the benefit of the Company or the Trustee shall bind and inure to the benefit of their permitted respective successors and assigns.

2.2. Severability. This Amendment shall be deemed severable, and the invalidity or unenforceability of any term or provision hereof shall not affect the validity or enforceability of this Amendment or of any other term or provision hereof. Furthermore, in lieu of any such invalid or unenforceable term or provision, the parties hereto intend that there shall be added as a part of this Amendment a provision as similar in terms to such invalid or unenforceable provision as may be possible and be valid and enforceable.

2.3. Applicable Law. This Amendment shall be governed by and construed and enforced in accordance with the laws of the State of New York.

2.4. Counterparts. This Amendment may be executed in several original or facsimile counterparts, each of which shall constitute an original, and together shall constitute but one instrument.

2.5. Effect of Headings. The section headings herein are for convenience only and are not part of this Amendment and shall not affect the interpretation thereof.

2.6. Entire Agreement. The Original Agreement, as modified by this Amendment, constitutes the entire understanding of the parties and supersedes all prior agreements, understandings, arrangements, promises and commitments, whether written or oral, express or implied, relating to the subject matter hereof, and all such prior agreements, understandings, arrangements, promises and commitments are hereby cancelled and terminated.

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of the date first above written.