Company: GIGGU
Filing Date: 2025-12-03
Form Type: 425
Source: 0001193125-25-305993
Chunk: 5

Company: GigCapital7 Corp.
Filing Date: 2025-12-03
Form: 425
Chunk 5
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 combination will be set forth in the Registration Statement, along with information concerning the interests of Hadron’s and GigCapital7’s participants in the solicitation. Such interests may
in some cases be different from those of Hadron’s or GigCapital7’s equity holders generally.

No Offer or Solicitation

This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities, or a solicitation of any vote or approval, nor
shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. This communication is not, and under no
circumstances is to be construed as, a prospectus, an advertisement or a public offering of the securities described herein in the United States or any other jurisdiction. No offer of securities shall be made except by means of a prospectus filed
with the SEC meeting the requirements of Section 10 of the Securities Act of 1933, as amended, or exemptions therefrom.

Hadron Energy Investor Center:

https://www.hadronenergy.com/investor-relations

Hadron Energy Media & Investor Contact:

Samuel
Gibson

Chief Executive Officer

sgibson@hadronenergy.com

GigCapital7 Investor Contact:

Christine M. Marshall

Chief Financial Officer