0001193125-25-221780 Sample Contracts

DATED SEPTEMBER 27, 2025 BUSINESS COMBINATION AGREEMENT BY AND AMONG GIGCAPITAL7 CORP., MMR MERGER SUB, INC. AND HADRON ENERGY, INC.
Business Combination Agreement • September 29th, 2025 • GigCapital7 Corp. • Blank checks • Delaware

This Business Combination Agreement (this “Agreement”) is made and entered into as of September 27, 2025, by and among (i) GigCapital7 Corp., a Cayman Islands exempted company (which shall transfer by way of continuation and domesticate as a Delaware corporation prior to Closing) (the “Purchaser”), (ii) MMR Merger Sub, Inc., a Delaware corporation and a direct wholly owned subsidiary of the Purchaser (“Merger Sub”), and (iii) Hadron Energy, Inc., a Delaware corporation (the “Company”). The Purchaser, Merger Sub and the Company are sometimes referred to herein individually as a “Party” and, collectively, as the “Parties.” Certain capitalized terms used in this Agreement have the meanings given to them in Article X of this Agreement.

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SPONSOR SUPPORT AGREEMENT
Sponsor Support Agreement • September 29th, 2025 • GigCapital7 Corp. • Blank checks • Delaware

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”).

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Transaction Support Agreement
Transaction Support Agreement • September 29th, 2025 • GigCapital7 Corp. • Blank checks • Delaware

TRANSACTION SUPPORT AGREEMENT, dated as of September 27, 2025 (this “Agreement”), by and among GigCapital7 Corp., a Cayman Islands exempted company (which shall transfer by way of continuation and domesticate as a Delaware corporation prior to Closing) (“GigCapital7”), and certain of the stockholders of Hadron Energy, Inc., a Delaware corporation (the “Company”), whose names appear on the signature pages of this Agreement (each, a “Stockholder” and, collectively, the “Stockholders”).

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