X0607 3 2026-05-22 0 0002023730 Hadron Energy, Inc. HDRN 0002133973 Gibson Samuel false C/O HADRON ENERGY, INC. 3 TWIN DOLPHIN DRIVE, STE 260 REDWOOD CITY CA 94065 1 1 1 0 Chief Executive Officer 0002138782 Gibson Family Holdings LLC false C/O HADRON ENERGY, INC. 3 TWIN DOLPHIN DRIVE, STE 260 REDWOOD CITY CA 94065 0 0 1 0 Common Stock 22797000 D Common Stock 20249584 I By Gibson Family Holdings LLC Common Stock 427491 I By SG 2026 Irrevocable Exempt Trust u/a dated January 29, 2026 Received by the reporting person in exchange for 458,949.43 shares of Hadron Energy, Inc. ("Hadron") held by reporting person in connection with the merger of Hadron into a subsidiary of GigCapital7 Corp. (the "Company") (the "Merger") pursuant to the exchange ratio set forth in the business combination agreement between Hadron and the Company. The acquisition of these shares is an exempt transaction under Rule 16b-3, promulgated by the U.S. Securities and Exchange pursuant to the Securities and Exchange Act of 1934, as amended. Received by the reporting person in exchange for 405,000 shares of Hadron held by reporting person in connection with the Merger pursuant to the exchange ratio set forth in the business combination agreement between Hadron and the Company. The acquisition of these shares is an exempt transaction under Rule 16b-3, promulgated by the U.S. Securities and Exchange pursuant to the Securities and Exchange Act of 1934, as amended. These shares are beneficially owned by reporting person, who has the voting and dispositive power over such shares. The shares held by Gibson Family Holdings LLC are beneficially owned by Mr. Gibson, the Company's Chief Executive Officer. Mr. Gibson is also the Manager of Gibson Family Holdings LLC, who has sole voting and dispositive power of the shares held by Gibson Family Holdings LLC. Received by the reporting person in exchange for 8,550 shares of Hadron held by reporting person in connection with the Merger pursuant to the exchange ratio set forth in the business combination agreement between Hadron and the Company. The acquisition of these shares is an exempt transaction under Rule 16b-3, promulgated by the U.S. Securities and Exchange pursuant to the Securities and Exchange Act of 1934, as amended. These shares are beneficially owned by reporting person, who has the voting and dispositive power over such shares. The shares held by the SG 2026 Irrevocable Exempt Trust are beneficially owned by Mr. Gibson, the Company's Chief Executive Officer. Mr. Gibson has a pecuniary interest in the SG 2026 Irrevocable Exempt Trust, who has sole voting and dispositive power of the shares held by the SG 2026 Irrevocable Exempt Trust. /s/ Samuel Gibson, individually 2026-06-05 /s/ Samuel Gibson, Manager of Gibson Family Holdings LLC 2026-06-05