X0306 4 2022-01-27 0 0001805833 System1, Inc. SST 0001845026 Kazerani Moujan C/O SYSTEM1, INC. 4235 REDWOOD AVENUE MARINA DEL REY CA 90066 1 0 0 0 Class A Common Stock 2022-01-27 4 A 0 75612 A 75612 I See Footnote Received in connection with the business combination (the "Business Combination") among System1, Inc., (f/k/a Trebia Acquisition Corp., (the "Company"), S1 Holdco, LLC ("S1 Holdco"), Orchid Merger Sub I, Inc. ("Merger Sub I"), Orchid Merger Sub II, LLC ("Merger Sub II" and, together with Merger Sub I, the "Merger Subs"), System1 SS Protect Holdings, Inc. ("Protected") and the other parties signatory to that certain business combination agreement, dated as of June 28, 2021 (as amended on November 30, 2021, January 10, 2022 and January 25, 2022). Reflects shares held by Carbon Investments, LLC. Moujan Kazerani is a member and officer of Carbon Investments, LLC. Ms. Kazerani disclaims beneficial ownership of the shares except to the extent of her pecuniary interest therein. By: /s/ Daniel Weinrot, Attorney-in-Fact for Moujan Kazerani 2022-02-01