Company: GIGGU
Filing Date: 2025-11-12
Form Type: S-4
Source: 0001193125-25-277896
Chunk: 938

Company: GigCapital7 Corp.
Filing Date: 2025-11-12
Form: S-4
Chunk 938
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 provision held to be invalid, illegal or unenforceable that is not itself held to be invalid, illegal or unenforceable) and the application of such provision to other persons or entities and circumstances shall not in any way be affected or impaired thereby, and (ii) the provisions of this Amended and Restated Certificate (including, without limitation, each portion of any paragraph of this Amended and Restated Certificate containing any such provision held to be invalid, illegal or unenforceable) shall be construed so as to permit the Corporation to protect its directors, officers, employees and agents from personal liability in respect of their good faith service or for the benefit of the Corporation to the fullest extent permitted by law.

<div align='center'>[Signature page follows.]

8</div>

IN WITNESS WHEREOF, Hadron Energy, Inc. has caused this Amended and Restated Certificate to be duly executed and acknowledged in its name and on its behalf by an authorized officer as of the date first set forth above.

|        |     | HADRON ENERGY, INC.                   |
| By:    |     |                                       |
| Name:  |     | Dr. Avi S. Katz                       |
| Title: |     | Chief Executive Officer and President |

[ Signature Page to Amended and Restated Certificate of Incorporation]

**ANNEX F

Execution Version**

<div align='center'>**SPONSOR SUPPORT AGREEMENT**</div>

This SPONSOR SUPPORT AGREEMENT (this “Agreement”), dated as of September 27, 2025, is entered into by and among GigAcquisitions7 Corp., a Cayman Islands exempted company (the “Sponsor”), GigCapital7 Corp., a Cayman Islands exempted company (“GigCapital7”), and Hadron Energy, Inc., a Delaware corporation (the “Company”).

<div align='center'>**RECITALS**</div>

WHEREAS, concurrently herewith, the Company, MMR Merger Sub, Inc., a Delaware corporation (“Merger Sub”), and GigCapital7 are entering into a Business Combination Agreement (as amended, supplemented, restated or otherwise modified from time to time, the “BCA”), pursuant to which (and subject to the terms and conditions set forth therein) Merger Sub will merge with and into the Company (the “Merger”), with the Company surviving the Merger as a wholly owned subsidiary of GigCapital7;

WHEREAS, capitalized terms used but not otherwise defined in this Agreement shall