X0306 4 2022-05-10 0 0001805833 System1, Inc. SST 0001915482 Civantos John C/O SYSTEM1, INC. 4235 REDWOOD AVENUE MARINA DEL REY CA 90066 1 0 0 0 Class A Common Stock 2022-05-10 4 A 0 22500 0.00 A 113034 D Represents a grant of restricted stock units ("RSUs) which convert into Class A Common Stock on a one-for-one basis, pursuant to the 2022 Incentive Award Plan of the Issuer. As of the grant date (May 10, 2022) 4,500 RSUs were fully vested, and the remaining aggregate 18,000 will vest in four equal installments on each of July 28, 2022, October 28, 2022, January 28, 2023 and April 28, 2023. /s/ Daniel Weinrot, Attorney-in-Fact for John Civantos 2022-05-10