System1, Inc. — Director's Dealing 2026

Jan 16, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: System1, Inc. (SST)
CIK: 0001805833
Period of Report: 2026-01-15

Reporting Person: Sestanovich Elizabeth (Chief People Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-01-15	Class A Common Stock	F	377	$4.40	Disposed	59500	Direct

Footnotes

F1: Upon the vesting of 670 restricted stock units ("RSUs") previously granted to the reporting person, the Company withheld 377 shares to cover the reporting person's tax withholding obligation with respect to the vesting of such RSUs.

F2: Includes 43,055 unvested RSUs.