Company: GIGGU
Filing Date: 2025-11-12
Form Type: S-4
Source: 0001193125-25-277896
Chunk: 817

Company: GigCapital7 Corp.
Filing Date: 2025-11-12
Form: S-4
Chunk 817
---
 Transaction Support Agreement as of the date first written above.

| GIGCAPITAL7 CORP. |     |                         |
| By:               |     |                         |
| Name:             |     | Dr. Avi S. Katz         |
| Title:            |     | Chief Executive Officer |

A-110

#### TRANSACTION SUPPORT AGREEMENTSPOUSAL CONSENTI [____________], spouse of [____________], have read and approve the foregoing Transaction Support Agreement (the “Agreement”). In consideration of the terms and conditions as set forth in the Agreement, I hereby appoint my spouse as myattorney-in-factwith respect to the exercise of any rights and obligations under the Agreement, and agree to be bound by the provisions of the Agreement insofar as I may have any rights or obligations in the Agreement under the community property laws or similar laws relating to marital or community property in effect in the state of our residence as of the date of the Agreement.Date: ___________________Signature of Spouse: ___________________Printed Name of Spouse: ___________________A-111
<div align='center'>**EXHIBIT C

FORM OF

AMENDED AND RESTATED

REGISTRATION RIGHTS AGREEMENT**</div>

This Amended and Restated Registration Rights Agreement (this “Agreement”) amends and restates in its entirety that certain Registration Rights Agreement dated August 28, 2024 by and among GigCapital7 Corp., a Cayman Islands exempted company (the “Company”), GigAcquisitions7 Corp., a Cayman Islands exempted company (the “Sponsor”), and the other parties thereto (the “Original RRA”), and is made and entered into as of _________, 202[_], by and among the Company, the Sponsor, the other parties to the Original RRA listed on Schedule B hereto, and each of the undersigned parties that are stockholders of Hadron (as defined below) listed under “Holder” on the signature page hereto (each such party to this Agreement, a “Holder” and collectively the “Holders”). Any capitalized term used but not defined herein will have the meaning ascribed to such term in the Business Combination Agreement (as defined below).

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

WHEREAS, the Company, Sponsor and other parties to the Original RRA entered into the Original RRA on August 28, 2024;

WHEREAS, the Original RRA provides that it may be amended upon the written consent of the