X0609 4 2026-05-22 0 0002023730 Hadron Energy, Inc. HDRN 0001451693 Katz Avi S false C/O GIGACQUISITIONS7 CORP. 1731 EMBARCADERO RD, SUITE 200 PALO ALTO CA 94303 1 1 1 0 Chairman 0002023728 GigAcquisitions7 Corp. false C/O GIGACQUISITIONS7 CORP. 1731 EMBARCADERO RD, SUITE 200 PALO ALTO CA 94303 0 0 1 0 0001430575 Dinu Raluca false C/O GIGACQUISITIONS7 CORP. 1731 EMBARCADERO RD, SUITE 200 PALO ALTO CA 94303 1 0 1 0 0 Common Stock 2026-05-22 4 A 0 87500 A 87500 D Common Stock 2026-05-22 4 A 0 87500 A 87500 I By Spouse, Dr. Raluca Dinu Common Stock 2026-05-22 4 A 0 9932246 A 9932246 I By GigAcquisitions7 Corp. Class B ordinary shares 2026-05-22 4 M 0 9932246 D 2026-05-22 2026-05-22 Common Stock 9932246 0 I GigAcquisitions7 Corp. Convertible Promissory Note 2026-05-22 4 J 0 29300 D 2026-05-22 2026-05-22 Class A ordinary shares 29300 0 I GigAcquisitions7 Corp. Convertible Promissory Note 2026-05-22 4 J 0 29300 D 2026-05-22 2026-05-22 Warrants 29300 0 I GigAcquisitions7 Corp. Received by Dr. Avi S. Katz in exchange for 1,750.04 shares of Hadron Energy, Inc. ("Hadron") held by Dr. Katz, 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. The closing price of the Company's Common Stock on the effective date of the Merger was $5.16. Received by Dr. Raluca Dinu in exchange for 1,750.04 shares of Hadron held by Dr. Dinu, in connection with the Merger of Hadron into a subsidiary of the Company 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. The Common Stock are held directly by GigAcquisitions7 Corp. (the "Sponsor"). The shares held by the Sponsor are beneficially owned by Dr. Katz, the Issuer's Chairman of the Board of Directors, and Dr. Dinu, the Issuer's Director. Dr. Katz and Dr. Dinu are the members of the Sponsor, who both have the voting and dispositive power over the shares held by the Sponsor. In connection with the closing of the Merger, the principal balance of the convertible promissory note was paid in full. /s/ Dr. Avi S. Katz, individually 2026-05-27 /s/ Dr. Avi S. Katz, as managing member of GigAcquisitions7 Corp. 2026-05-27 /s/ Dr. Raluca Dinu, individually 2026-05-27