Company: GIGGU
Filing Date: 2025-09-29
Form Type: 425
Source: 0001193125-25-221783
Chunk: 181

Company: GigCapital7 Corp.
Filing Date: 2025-09-29
Form: 425
Chunk 181
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 Joinder (each, a “” and, collectively, the
“”), and GigCapital7 Corp., a Cayman Islands exempted company (which shall transfer by way of continuation and domesticate as a Delaware corporation prior to Closing) (“”).

RECITALS

A. GigCapital7
and certain stockholders of the Company have entered into a Transaction Support Agreement dated September [•], 2025 (as amended, modified, supplemented, extended or restated from time to time, the “”) in regard to
the support of the Merger and the other transactions contemplated by the BCA. Capitalized terms used herein but not otherwise defined shall have the meanings set forth in the Agreement.

B. Pursuant to the Agreement, certain stockholders of the Company have agreed, among other things, to (i) vote in favor of the approval
and adoption of the BCA and approval of the Merger and all other transactions contemplated by the BCA, and (ii) terminate the Terminating Rights effective immediately prior to the Closing under the BCA.

C. In order to induce GigCapital7 to consummate the Merger and other transactions contemplated by the BCA, [the] [each] Additional Stockholder
is willing to become a party to the Agreement and be bound by all terms and conditions thereof.

NOW, THEREFORE, in consideration of the
mutual covenants contained herein and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties to this Joinder hereby agree as follows:

1. . [Each] [The] Additional Stockholder hereby: (a) acknowledges that he, she or it has received and
reviewed a complete copy of the Agreement and understands its terms, (b) has had sufficient opportunity to review and to ask questions relating thereto and obtain the advice of his, her or its tax advisors, legal counsel and accountants and
other professional advisors prior to executing this Agreement, and (c) agrees that upon execution of this Joinder, it shall become a “Stockholder” under the Agreement and shall be fully bound by, and subject to, all of the
covenants, duties, obligations terms and conditions of the Agreement as though an original party thereto.

2. .
This Joinder and all acts and transactions pursuant hereto and the rights and obligations of the parties hereto shall be governed, construed and interpreted in accordance with the laws of the State of Delaware applicable to contracts executed in and
to be performed