Elizabeth Sestanovich - 15 Jan 2026 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
15 Jan 2026
Net transactions value
-$1,659
Form type
4
Filing time
16 Jan 2026, 18:29:43 UTC
Previous filing
30 Oct 2025
Next filing
29 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 16 Jan 2026 0001907093

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SST Class A Common Stock Tax liability $1,659 -377 -0.63% $4.40 59,500 15 Jan 2026 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 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.