X0306 4 2022-04-19 0001805833 System1, Inc. SST 0001814422 Trasimene Trebia, LP C/O 1701 VILLAGE CENTER CIRCLE LAS VEGAS NV 89134 true true 0001814428 Trasimene Trebia, LLC C/O 1701 VILLAGE CENTER CIRCLE LAS VEGAS NV 89134 true true 0000903213 FOLEY WILLIAM P II C/O 1701 VILLAGE CENTER CIRCLE LAS VEGAS NV 89134 true true Class A common stock, par value $0.0001 per share 2022-04-19 4 M 0 4734167 11.5 A 9305122 D Class A common stock, par value $0.0001 per share 2022-04-19 4 D 0 2703224 20.14 D 6601898 D Warrants 11.5 2022-04-19 4 M 0 4734167 D 2022-02-26 2027-01-27 Class A common stock, par value $0.0001 4734167 0 D This form is being filed by each of the following Reporting Persons: Trasimene Trebia, LP ("Trasimene"), Trasimene Trebia, LLC ("Trasimene Trebia"), and William P. Foley, II (collectively, the "Reporting Persons"). William P. Foley, II is the sole member of Trasimene Trebia, which is the sole general partner of Trasimene. Because of the relationships among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Directly owned by Trasimene. Trasimene exercised warrants to purchase shares of the Issuer's Class A common stock. The warrants were exercised on a cashless basis pursuant to Section 3.3.1(c) of that certain Warrant Agreement, dated June 19, 2020, by and between Trebia Acquisition Corp. (n/k/a System1, Inc.) and Continental Stock Transfer Trust Company. Represents shares of Class A common stock "withheld" in connection with the cashless exercise. Not applicable. Exhibit 99.1 (Joint Filer Information and Signatures) is hereby incorporated by reference herein. See Exhibit 99.1 2022-04-20