Elizabeth Sestanovich - 28 Oct 2025 Form 4 Insider Report for System1, Inc. (SST)

Role
Chief People Officer
Signature
/s/ Daniel Weinrot, Attorney-in-Fact for Elizabeth Sestanovich
Issuer symbol
SST
Transactions as of
28 Oct 2025
Net transactions value
-$976
Form type
4
Filing time
30 Oct 2025, 18:16:45 UTC
Previous filing
17 Oct 2025
Next filing
16 Jan 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Sestanovich Elizabeth Chief People Officer 4235 REDWOOD AVE, LOS ANGELES /s/ Daniel Weinrot, Attorney-in-Fact for Elizabeth Sestanovich 30 Oct 2025 0001907093

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SST Class A Common Stock Tax liability $976 -158 -0.26% $6.18 59,877 28 Oct 2025 Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Upon the vesting of 375 restricted stock units ("RSUs") previously granted to the reporting person, the Company withheld 158 shares to cover the reporting person's tax withholding obligation with respect to the vesting of such RSUs.
F2 Includes 43,725 unvested RSUs.