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System1, Inc. (SST)

System1, Inc. (SST) Insider Trading

Directors, officers and holders of more than 10% of SST report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 89 transactions on file: 5 with code P, 0 with code S and 45 with other codes.

DateInsiderCodeShares
Jul 15, 2026Kidambi TridiveshF Tax Payment6,022
Jul 15, 2026Weinrot Daniel JF Tax Payment9,156
Jul 15, 2026Sestanovich ElizabethF Tax Payment7,058
Jul 15, 2026Coppola BrianF Tax Payment6,124
May 29, 2026Kidambi TridiveshA Award35,300
Apr 15, 2026Kidambi TridiveshF Tax Payment301
Apr 15, 2026Kidambi TridiveshP Purchase26,910
Apr 15, 2026Weinrot Daniel JF Tax Payment341
Apr 15, 2026Coppola BrianF Tax Payment331
Apr 15, 2026Sestanovich ElizabethF Tax Payment341
Jan 28, 2026Coppola BrianF Tax Payment231
Jan 28, 2026Kidambi TridiveshF Tax Payment258
Jan 28, 2026Weinrot Daniel JF Tax Payment211
Jan 28, 2026Sestanovich ElizabethF Tax Payment211
Jan 15, 2026Coppola BrianF Tax Payment371
Jan 15, 2026Kidambi TridiveshF Tax Payment345
Jan 15, 2026Sestanovich ElizabethF Tax Payment377
Jan 15, 2026Weinrot Daniel JF Tax Payment377
Oct 28, 2025Kidambi TridiveshF Tax Payment263
Oct 28, 2025Coppola BrianF Tax Payment235
Oct 28, 2025Sestanovich ElizabethF Tax Payment158
Oct 28, 2025Weinrot Daniel JF Tax Payment214
Oct 15, 2025Weinrot Daniel JF Tax Payment382
Oct 15, 2025Kidambi TridiveshF Tax Payment352
Oct 15, 2025Sestanovich ElizabethF Tax Payment282
Oct 15, 2025Coppola BrianF Tax Payment377
Aug 22, 2025CEE Holdings TrustP Purchase11,015
Aug 21, 2025CEE Holdings TrustP Purchase12,584
Aug 20, 2025CEE Holdings TrustP Purchase12,584
Aug 19, 2025CEE Holdings TrustP Purchase6,567
Jul 31, 2025Naidu Taryn JogiA Award15,000
Jul 31, 2025MARTIRE FRANK RA Award15,000
Jul 31, 2025Civantos JohnA Award15,000
Jul 31, 2025Kumar TanmayA Award15,000
Jul 31, 2025Caswell Ryan R.A Award15,000
Jul 31, 2025Kazerani MoujanA Award15,000
Jul 31, 2025Horn CarolineA Award15,000
Jul 29, 2025Kidambi TridiveshA Award50,000
Jul 29, 2025Kidambi TridiveshA Award20,000
Jul 29, 2025Weinrot Daniel JA Award52,500
Jul 29, 2025Sestanovich ElizabethA Award40,000
Jul 29, 2025Coppola BrianA Award40,000
Jul 29, 2025Ursini CharlesA Award337,500
Jul 28, 2025Coppola BrianF Tax Payment206
Jul 28, 2025Sestanovich ElizabethF Tax Payment135
Jul 28, 2025Weinrot Daniel JF Tax Payment191
Jul 28, 2025Kidambi TridiveshF Tax Payment224
Jul 15, 2025Sestanovich ElizabethF Tax Payment240
Jul 15, 2025Weinrot Daniel JF Tax Payment341
Jul 15, 2025Kidambi TridiveshF Tax Payment300

The full Form 4 history is on the SST company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.