X0306 4 2021-05-28 0001848795 GigInternational1, Inc. GIW 0001451693 Katz Avi S C/O GIGINTERNATIONAL1, INC. 1731 EMBARCADERO ROAD, SUITE 200 PALO ALTO CA 94303 1 1 1 0 Executive Chairman 0001848851 GigInternational1 Sponsor, LLC C/O GIGINTERNATIONAL1, INC. 1731 EMBARCADERO RD SUITE 200 PALO ALTO CA 94303 0 0 1 0 Common Stock 2021-05-28 4 J 0 525000 0.00 D 5210000 I By GigInternational1 Sponsor, LLC Forfeiture of 525,000 shares of Common Stock for no additional consideration in connection with the underwriters' election not to fully exercise the over-allotment option as described in the Issuer's registration statement on Form S-1. The Common Stock is held directly by GigInternational1 Sponsor, LLC (the "Sponsor"). The shares held by the Sponsor are beneficially owned by Dr. Katz, GigInternational1, Inc.'s Executive Chairman of the Board of Directors. Dr. Katz is also the Manager of the Sponsor, who has sole voting and dispositive power over the shares held by the Sponsor. /s/ Avi S. Katz, individually 2021-05-28 /s/ Avi S. Katz, as Manager of GigInternational1 Sponsor, LLC 2021-05-28