System1, Inc. — Director's Dealing 2025

Jul 17, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: System1, Inc. (SST)
CIK: 0001805833
Period of Report: 2025-07-15

Reporting Person: Weinrot Daniel J (General Counsel & Secretary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-07-15	Class A Common Stock	F	341	$6.33	Disposed	18269	Direct

Footnotes

F1: Upon the vesting of 670 restricted stock units ("RSUs") previously granted to the reporting person, the Company withheld 341 shares to cover the reporting person's tax withholding obligation with respect to the vesting of such RSUs.

F2: Represents the total number of shares held after the Issuer's completion of a 1-for-10 reverse stock split that occurred on June 11, 2025.

F3: Includes 5,145 unvested RSUs.