X0306 4 2022-05-10 0 0001805833 System1, Inc. SST 0001624457 Weinrot Daniel J C/O SYSTEM1, INC. 4235 REDWOOD AVENUE MARINA DEL REY CA 90066 0 1 0 0 See Remarks Class A Common Stock 2022-05-10 4 A 0 60000 0.00 A 98464 D Mr. Weinrot was granted 60,000 restricted stock units ("RSUs") in connection with his continued employment with System1, Inc. ("SST"). Each RSU represents the right to receive one share of SST Class A Common Stock upon vesting. Subject to the continued employment of Mr. Weinrot through the applicable vesting dates, (i) 3,000 of the RSUs will vest on January 28, 2023, (ii) 9,000 of the RSUs will vest in quarterly installments of 2,250 each on January 28, April 28, July 28 and October 28, 2024 and (iii) the remaining 48,000 RSUs will vest in eight (8) quarterly installments of 6,000 each on the quarterly anniversary thereafter. General Counsel & Corporate Secretary /s/ Daniel Weinrot, Attorney-in-Fact for Daniel Weinrot 2022-05-12