Avi S. Katz - Oct 3, 2025 Form 3 Insider Report for GigCapital8 Corp. (GIW)

Role
Chief Executive Officer, Director, 10%+ Owner
Signature
/s/ Dr. Avi S. Katz, individually
Stock symbol
GIW
Transactions as of
Oct 3, 2025
Transactions value $
$0
Form type
3
Date filed
10/7/2025, 09:02 PM
Previous filing
Sep 2, 2025
SEC
View on sec.gov

Reporting Owners (3)

Name Relationship Address Signature Signature date CIK
Katz Avi S Chief Executive Officer, Director, 10%+ Owner C/O GIGCAPITAL8 CORP., 1731 EMBARCADERO ROAD, SUITE 200, PALO ALTO /s/ Dr. Avi S. Katz, individually 2025-10-07 0001451693
GigAcquisitions8 Corp. 10%+ Owner C/O GIGCAPITAL8 CORP., 1731 EMBARCADERO RD., SUITE 200, PALO ALTO /s/ Dr. Avi S. Katz, as managing member of GigAcquisitions8 Corp. 2025-10-07 0002080021
Dinu Raluca Director C/O GIGCAPITAL8 CORP., 1731 EMBARCADERO RD., SUITE 200, PALO ALTO /s/ D. Raluca Dinu 2025-10-07 0001430575

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
holding GIW Class A ordinary shares 10K Oct 3, 2025 By GigAcquisitions8 Corp. F1, F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
holding GIW Class B ordinary shares Oct 3, 2025 Class A ordinary shares 6.05M By GigAcquisitions8 Corp. F2, F3, F4
holding GIW Rights Oct 3, 2025 Class A ordinary shares 2K By GigAcquisitions8 Corp. F2, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Includes 10,000 Class A ordinary shares underlying the private placement units purchased concurrently with the initial public offering.
F2 The Class B ordinary shares and Class A ordinary shares underlying the private placement units are held directly by GigAcquisitions8 Corp. (the "Sponsor"). The shares held by the Sponsor are beneficially owned equally (50% each) by Dr. Katz, the Issuer's Chief Executive Officer and Chairman of the Board of Directors, and Dr. Raluca 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.
F3 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. 333-289479) and have no expiration date.
F4 Includes 6,053,167 Class B ordinary shares of the Issuer acquired by GigAcquisitions8 Corp. (the "Sponsor") prior to the Issuer's initial public offering convertible for the Issuer's Class A ordinary shares. As a result of the underwriter's full exercise of its over-allotment option to purchase 3,300,000 units on October 7, 2025, no such shares are subject to forfeiture.
F5 Includes 10,000 rights underlying the private placement units, which were sold in a private placement taking place simultaneously with the Issuer's initial public offering. Each right is exchangeable for one-fifth of one Class A ordinary share upon the completion of the Issuer's initial business combination.