Sec Form 4 Filing - Katz Avi S @ GigCapital7 Corp. - 2026-01-21

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Katz Avi S 2. Issuer Name and Ticker or Trading Symbol GigCapital7 Corp. [ GIGGU] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner X __ Officer (give title below) _____ Other (specify below) CEO; Chairmain (Last) (First) (Middle) C/O GIGCAPITAL7 CORP., 1731 EMBARCADERO RD, SUITE 200 3. Date of Earliest Transaction (MM/DD/YY) 01/21/2026 (Street) PALO ALTO, CA94303 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 ( 1 ) 01/21/2026 S( 2 ) 175,000 ( 1 ) ( 1 ) Class A ordinary shares 175,000 ( 1 ) ( 2 ) 9,932,246 I GigAcquisitions7 Corp. ( 3 ) Convertible Promissory Note ( 4 ) 01/30/2026 A 14,800 ( 4 ) ( 5 ) Class A ordinary shares 14,800 ( 6 ) 14,800 I GigAcquisitions7 Corp. ( 3 ) Convertible Promissory Note ( 4 ) 01/30/2026 A 14,800 ( 4 ) ( 5 ) Warrants 14,800 ( 6 ) 14,800 I GigAcquisitions7 Corp. ( 3 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Katz Avi S C/O GIGCAPITAL7 CORP. 1731 EMBARCADERO RD, SUITE 200 PALO ALTO, CA94303 X X CEO; Chairmain GigAcquisitions7 Corp. C/O GIGCAPITAL7 CORP. 1731 EMBARCADERO RD, SUITE 200 PALO ALTO, CA94303 X Dinu Raluca C/O GIGCAPITAL7 CORP. 1731 EMBARCADERO ROAD SUITE 200 PALO ALTO, CA94303 X X Signatures /s/ Dr. Avi S. Katz, individually 02/17/2026 Signature of Reporting Person Date /s/ Dr. Avi S. Katz, as managing member of GigAcquisitions7 Corp. 02/17/2026 Signature of Reporting Person Date /s/ Dr. Raluca Dinu, individually 02/17/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The Class B ordinary shares are convertible for the Issuer's Class A ordinary shares as described under the heading "Description of Securities" in the Issuer's Registration Statement on Form S-1 (File No. 333-280015) and have no expiration date. ( 2 )The reporting person sold 175,000 shares of Class B ordinary shares for an aggregate of $148,750, which the reporting person holds indirectly through GigAcquisitions7 Corp. ( 3 )The Class B ordinary shares are held directly by GigAcquisitions7 Corp. (the "Sponsor"). The shares held by the Sponsor are beneficially owned by Dr. Katz, GigCapital7 Corp.'s Chief Executive Officer and Chairman of the Board of Directors, and Dr. Raluca Dinu, GigCapital7 Corp.'s Director. Dr. Katz and Dr. Dinu are the sole members of the Sponsor, who both have the voting and dispositive power over the shares held by the Sponsor. ( 4 )On January 30, 2026, the Issuer entered into a Convertible Promissory Note (the "Note") promising to pay Sponsor, $148,000.00. All amounts due under the Note may be converted into 14,800 units. Each unit consisting of one Class A ordinary share and one warrant to purchase one Class A ordinary share, resulting in the aggregate of 14,800 Class A ordinary shares and warrants to purchase an additional 14,800 Class A ordinary shares of the Issuer at the discretion of the Sponsor upon the consummation of the business combination. The warrants shall have the same terms and conditions as warrants issued in the Issuer's initial public offering. The acquisition of the Note by the Sponsor, and through it, the beneficial acquisition of the Note by the Sponsor's sole members, is an exempt transaction under Rule 16b-3, promulgated by the U.S. Securities and Exchange Commission pursuant to the Securities Exchange Act of 1934, as amended. ( 5 )The principal balance of the Note shall be payable by the Issuer on the earlier of: (i) the date on which Issuer consummates its initial business combination or (ii) the date that the winding up of the Issuer is effective. Payee may elect to convert the Note upon consummation of an initial business combination of the Issuer or at Payee's option at any time prior to the payment in full. ( 6 )The Issuer's Class A ordinary shares and warrants as described under the heading "Description of Securities" in the Issuer's Registration Statement on Form S-1 (File No. 333-280015).

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

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