Execution Version

SUBSCRIPTION AGREEMENT

This Subscription Agreement (this “Subscription Agreement”) is being entered into as of the date set forth on the signature page to this Subscription Agreement, by and among Texas Ventures Acquisition III Corp, a Cayman Islands exempted company limited by shares (the “Issuer”, which after the date of the Domestication, shall be known as PlusAI Holdings, Inc., a Delaware corporation), Plus Automation, Inc., a Delaware corporation (the “Company”), and the undersigned (the “Investor”). The Subscription Agreement is entered into in connection with the Agreement and Plan of Merger and Reorganization, dated August [__], 2026 (as may be amended, supplemented or otherwise modified from time to time, the “Merger Agreement”), by and among the Issuer, the Company and the other parties thereto. The transactions contemplated by the Merger Agreement are referred to in this Subscription Agreement as the “Transaction” and the purchase and sale of the Securities (as defined below) pursuant to this Subscription Agreement are referred to in this Subscriptio

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THIS INSTRUMENT AND ANY SECURITIES ISSUABLE PURSUANT HERETO HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), OR UNDER THE SECURITIES LAWS OF CERTAIN STATES. THESE SECURITIES MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED EXCEPT AS PERMITTED IN THIS SAFE AND UNDER THE ACT AND APPLICABLE STATE SECURITIES LAWS PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT OR AN EXEMPTION THEREFROM.

Plus Automation, INc.

SAFE

(Simple Agreement for Future Equity)

THIS CERTIFIES THAT in exchange for the payment by ____________ (the “Investor”) of $___________ (the “Purchase Amount”) on ____, 2024, Plus Automation, Inc., a Delaware corporation (the “Company”), issues to the Investor the right to certain shares of the Company’s Capital Stock, subject to the terms described below. For the avoidance of doubt, this Safe is one in a series of Safes issued by the Company with the same Discount Rate.

The “Discount Rate” is 95% from the date hereof to one year after the date hereof, and 90% thereafter.

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THIS INSTRUMENT AND ANY SECURITIES ISSUABLE PURSUANT HERETO HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), OR UNDER THE SECURITIES LAWS OF CERTAIN STATES. THESE SECURITIES MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED EXCEPT AS PERMITTED IN THIS SAFE AND UNDER THE ACT AND APPLICABLE STATE SECURITIES LAWS PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT OR AN EXEMPTION THEREFROM.

Plus Automation, INc.

SAFE

(Simple Agreement for Future Equity)

THIS CERTIFIES THAT in exchange for the payment by Luminar Technologies, Inc. (the “Investor”) of $10,000,000.00 (the “Purchase Amount”) on or about August 9, 2023, Plus Automation, Inc., a Delaware corporation (the “Company”), issues to the Investor the right to certain shares of the Company’s Capital Stock, subject to the terms described below.

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PLUSAI, INC.

January 8, 2026

Shawn Kerrigan

Via email

Re: Confirmatory Employment Letter

Dear Shawn:

This confirmatory employment letter agreement (the “Agreement”) is entered into between Shawn Kerrigan (“you”) and PlusAI, Inc. (the “Company” or “we”), effective as of the date of this Agreement as first set forth above (the “Effective Date”), to confirm certain terms and conditions of your employment with the Company as of the Effective Date.

1.

Title; Position; Location. You will continue to serve in a full-time capacity as the Company’s Chief Operating Officer. You also will continue to report to the Company’s Chief Executive Officer and will perform the duties and responsibilities customary for such position and such other related duties as are reasonably assigned by the Chief Executive Officer. You will perform your duties from the Company’s corporate offices located in Santa Clara, California, subject to customary travel as reasonably required by the Company and necessary to perform your job duties.

2.

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March 10, 2026

Bryant Park

[* * *]

Dear Bryant:

PlusAI, Inc. (the “Company”) is pleased to offer you employment on the following terms:

1. Position. The Company is offering you a position as VP of Corporate Development. You will report to the Company’s Chief Financial Officer, Steve Spinner. This is a full-time position. While you render services to the Company, you will not engage in any other employment, consulting or other business activity (whether full-time or part-time) that would create a conflict of interest with the Company. You represent that you have no agreement with a prior employer that may restrict your ability to work at Plus. If you have any provisions restricting your work, even if you think they do not apply or are unenforceable, please be sure to let us know. By signing this letter agreement, you confirm to the Company that you have no contractual commitments or other legal obligations that would prohibit you from performing your duties for the Company.

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PLUSAI HOLDINGS, INC.

INDEMNIFICATION AGREEMENT

This Indemnification Agreement (this “Agreement”) is dated as of [insert date], and is between PlusAI Holdings, Inc., a Delaware corporation (the “Company”), and [insert name of indemnitee] (“Indemnitee”).

RECITALS

A.

Indemnitee’s service to the Company substantially benefits the Company.

B.

Individuals are reluctant to serve as directors or officers of corporations or in certain other capacities unless they are provided with adequate protection through insurance or indemnification against the risks of claims and actions against them arising out of such service.

C.

Indemnitee does not regard the protection currently provided by applicable law, the Company’s governing documents and any insurance as adequate under the present circumstances, and Indemnitee may not be willing to serve as a director or officer without additional protection.

D.

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PlusAI, Inc.

January 8, 2026

Hao Zheng

Via email

Re: Confirmatory Employment Letter

Dear Hao:

This confirmatory employment letter agreement (the “Agreement”) is entered into between Hao Zheng (“you”) and PlusAI, Inc. (the “Company” or “we”), effective as of the date of this Agreement as first set forth above (the “Effective Date”), to confirm certain terms and conditions of your employment with the Company as of the Effective Date.

1.

Title; Position; Location. You will continue to serve in a full-time capacity as the Company’s Chief Technology Officer. You also will continue to report to the Company’s Chief Executive Officer and will perform the duties and responsibilities customary for such position and such other related duties as are reasonably assigned by the Chief Executive Officer. You will perform your duties from the Company’s corporate offices located in Santa Clara, California, subject to customary travel as reasonably required by the Company and necessary to perform your job duties.

2.

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SUBSCRIPTION AGREEMENT

This Subscription Agreement (this “Subscription Agreement”) is being entered into as of the date set forth on the signature page to this Subscription Agreement, by and among Texas Ventures Acquisition III Corp, a Cayman Islands exempted company limited by shares (the “Issuer”, which after the date of the Domestication, shall be known as PlusAI Holdings, Inc., a Delaware corporation), Plus Automation, Inc., a Delaware corporation (the “Company”), and the undersigned (the “Investor”). The Subscription Agreement is entered into in connection with the Agreement and Plan of Merger and Reorganization, dated August [__], 2026 (as may be amended, supplemented or otherwise modified from time to time, the “Merger Agreement”), by and among the Issuer, the Company and the other parties thereto. The transactions contemplated by the Merger Agreement are referred to in this Subscription Agreement as the “Transaction” and the purchase and sale of the Securities (as defined below) pursuant to this Subscription Agreement are referred to in this Subscription Agreement as the

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PlusAI, Inc.

January 8, 2026

David Liu

Via email

Re: Confirmatory Employment Letter

Dear David:

This confirmatory employment letter agreement (the “Agreement”) is entered into between David Liu (“you”) and PlusAI, Inc. (the “Company” or “we”), effective as of the date of this Agreement as first set forth above (the “Effective Date”), to confirm certain terms and conditions of your employment with the Company as of the Effective Date.

1.

Title; Position; Location. You will continue to serve in a full-time capacity as the Company’s President and Chief Executive Officer. You also will continue to report to the Company’s Board of Directors (the “Board”) and will perform the duties and responsibilities customary for such position and such other related duties as are reasonably assigned by the Board. You will perform your duties from the Company’s corporate offices located in Santa Clara, California, subject to customary travel as reasonably required by the Company and necessary to perform your job duties.

2.

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AUTONOMY ACCELERATION PROGRAM AGREEMENT

This AUTONOMY ACCELERATION PROGRAM AGREEMENT (this “Agreement”) is entered into as of March 26, 2026 (the “Effective Date”), by and between PLUS AUTOMATION, INC., a Delaware corporation (“PlusAI”), and TRATON AB, a private limited liability company incorporated and organized under Swedish law, having its registered office at [***] (“TRATON”).

PlusAI and TRATON are each referred to herein as a “Party” and collectively as the “Parties”.

RECITALS

WHEREAS, PlusAI and certain TRATON affiliates are parties to that certain Collaboration Agreement dated December 11, 2023, as amended (the “L4 Collaboration Agreement”), pursuant to which PlusAI and such TRATON affiliates have been working together to develop and commercialize a finished Level 4 driverless transport solution based on a specially-adapted version of PlusAI's autonomous driving technology;

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June 30, 2026

Daphne Karydas

[***]

Dear Daphne,

On behalf of Serapha Bio, Inc. (the “Company”) we are pleased to offer you (“you” or the “Executive”) employment with the Company based on the general terms that are outlined in this letter.

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June 15, 2026

Kenneth Mills

[***]

Dear Kenneth,

On behalf of RTW Newco10, Inc. (the “Company”) we are pleased to offer you (“you” or the “Executive”) employment with the Company based on the general terms that are outlined in this letter.

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