Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Katz Avi S 2. Issuer Name and Ticker or Trading Symbol Hadron Energy, Inc. [HDRN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director __X__ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chairman (Last) (First) (Middle) C/O GIGACQUISITIONS7 CORP., 1731 EMBARCADERO RD, SUITE 200 3. Date of Earliest Transaction (Month/Day/Year) 05/22/2026 (Street) PALO ALTO, CA 94303 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 05/22/2026 A 87,500(1) A (2) 87,500 D Common Stock 05/22/2026 A 87,500(3) A (2) 87,500 I By Spouse, Dr. Raluca Dinu Common Stock 05/22/2026 A 9,932,246(4) A (2) 9,932,246 I By GigAcquisitions7 Corp.(4)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Class B ordinary shares

(2)

05/22/2026

M

9,932,246

05/22/2026

05/22/2026

Common Stock

9,932,246

(2)

0

I

GigAcquisitions7 Corp.(4)

Convertible Promissory Note

(5)

05/22/2026

J

29,300

05/22/2026

05/22/2026

Class A ordinary shares

29,300

(5)

0

I

GigAcquisitions7 Corp.(4)

Convertible Promissory Note

(5)

05/22/2026

J

29,300

05/22/2026

05/22/2026

Warrants

29,300

(5)

0

I

GigAcquisitions7 Corp.(4)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Katz Avi S C/O GIGACQUISITIONS7 CORP. 1731 EMBARCADERO RD, SUITE 200 PALO ALTO, CA 94303	X	X	Chairman
GigAcquisitions7 Corp. C/O GIGACQUISITIONS7 CORP. 1731 EMBARCADERO RD, SUITE 200 PALO ALTO, CA 94303		X
Dinu Raluca C/O GIGACQUISITIONS7 CORP. 1731 EMBARCADERO RD, SUITE 200 PALO ALTO, CA 94303	X	X

Signatures

/s/ Dr. Avi S. Katz, individually		05/27/2026
**Signature of Reporting Person		Date
/s/ Dr. Avi S. Katz, as managing member of GigAcquisitions7 Corp.		05/27/2026
**Signature of Reporting Person		Date
/s/ Dr. Raluca Dinu, individually		05/27/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	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.
(2)	The closing price of the Company's Common Stock on the effective date of the Merger was $5.16.
(3)	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.
(4)	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.
(5)	In connection with the closing of the Merger, the principal balance of the convertible promissory note was paid in full.

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