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System1, Inc.

SST
Exchange
NYSE
Industry
Services-Computer Programming, Data Processing, Etc.
SEC CIK
0001805833

No open-market purchases or sales by System1, Inc. insiders were filed in the last 90 days; 21 institutions reported holding it in 13F filings for Q2 2026, worth $1.38M in total; no superinvestor holds it.

Other share classesSSTPW

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by System1, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
0 filings
Insiders trading
0
Net value
$0
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for System1, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for System1, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Sestanovich ElizabethChief People Officer51,890Jul 17, 20266
Coppola BrianChief Ad Operations Officer59,774Jul 17, 20266
Kidambi TridiveshChief Financial Officer175,793Jul 17, 20267
Weinrot Daniel JGeneral Counsel & Secretary59,897Jul 17, 20266
CEE Holdings Trust10% Owner919,555Aug 26, 20250
Martire Frank RDirector41,575Aug 5, 20250
Caswell Ryan R.Director38,577Aug 5, 20250
Naidu Taryn JogiDirector38,562Aug 4, 20250
Kumar TanmayDirector35,196Aug 4, 20250
Kazerani MoujanDirector40,292Aug 4, 20250
Horn CarolineDirector37,418Aug 4, 20250
Civantos JohnDirector70,613Aug 4, 20250
Ursini CharlesPresident & COO367,500Jul 31, 20250
Lone Star Friends Trust10% Owner2,500,000IndirectDec 27, 20240
Blend Stanley10% Owner2,500,000IndirectDec 27, 20240
Robinson Jennifer LynnChief Technology Officer161,943Aug 20, 20240
Blend L MichaelCEO & Chairman0Aug 14, 20240
Fowler William DexterDirector218,433Jun 13, 20240
Prince Jennifer MindyDirector222,433Jun 13, 20240
Cannae Holdings, LLC10% Owner27,012,794IndirectSep 7, 20230
Cannae Holdings, Inc.10% Owner27,012,794IndirectSep 7, 20230
Phillips Christopher StephenDirector, 10% Owner160,000Aug 3, 20230
Trasimene Trebia, LPDirector, 10% Owner0Mar 14, 20230
Filsinger PaulPresident459,399Oct 17, 20220
Just Develop It Ltd10% Owner18,672,586IndirectSep 9, 20220
Foley William P IIDirector, 10% Owner24,000May 12, 20220
JDI & AFH Ltd10% Owner0IndirectApr 22, 20220
Trasimene Trebia, LLCDirector, 10% Owner6,601,898Apr 20, 20220
BGPT Trebia LPDirector, 10% Owner4,450,879Apr 20, 20220
Bridgeport Partners GP LLCDirector, 10% Owner4,450,879Apr 20, 20220
Martire Frank IIIDirector, 10% Owner4,450,879Apr 20, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Apr 17, 2026 (view filing)Apr 152 daysKidambi TridiveshChief Financial OfficerPPurchaseClass A Common Stock+26.9K$3.00+$80.7K+22.4%146.8K after
Aug 26, 2025 (view filing)Aug 224 daysCEE Holdings Trust10% OwnerPPurchaseClass A Common Stock+11.0K$7.32+$80.6K+1.2%919.6K after
Aug 21, 2025 (view filing)Aug 19-212 daysCEE Holdings Trust10% OwnerPPurchaseClass A Common Stock+31.7K$6.52+$207.0K+3.6%908.5K after3 lots
Jun 17, 2025 (view filing)Jun 134 daysCivantos JohnDirectorPPurchaseClass A Common Stock+6.16K$4.01+$24.7K+12.5%55.6K after
Jun 13, 2025 (view filing)Jun 121 dayCivantos JohnDirectorPPurchaseClass A Common Stock+18.8K$3.89+$73.3K+61.5%49.5K after
Jun 11, 2025 (view filing)Jun 92 daysKidambi TridiveshChief Financial OfficerSSaleClass A Common Stock−15.0K$0.00$0–0 afterDerivative
Sep 19, 2024 (view filing)Sep 163 daysLateCEE Holdings Trust10% OwnerPPurchaseClass A Common Stock+8.41K$1.24+$10.4K+0.1%8.77M after
Sep 12, 2024 (view filing)Sep 10-122 daysCEE Holdings Trust10% OwnerPPurchaseClass A Common Stock+11.8K$1.21+$14.3K+0.1%8.76M after3 lots
Sep 9, 2024 (view filing)Sep 5-94 daysCEE Holdings Trust10% OwnerPPurchaseClass A Common Stock+18.1K$1.22+$22.0K+0.2%8.75M after3 lots
Sep 4, 2024 (view filing)Aug 30-Sep 45 daysCEE Holdings Trust10% OwnerPPurchaseClass A Common Stock+25.4K$1.24+$31.4K+0.3%8.73M after3 lots
Aug 23, 2024 (view filing)Aug 21-232 daysCEE Holdings Trust10% OwnerPPurchaseClass A Common Stock+46.4K$1.22+$56.4K+0.5%8.70M after2 lots
Aug 20, 2024 (view filing)Aug 16-204 daysCEE Holdings Trust10% OwnerPPurchaseClass A Common Stock+13.5K$1.23+$16.6K+0.2%8.66M after2 lots
Aug 15, 2024 (view filing)Aug 13-152 daysCEE Holdings Trust10% OwnerPPurchaseClass A Common Stock+19.5K$1.08+$21.0K+0.2%8.64M after3 lots
Jul 11, 2024 (view filing)Jul 9-112 daysCEE Holdings Trust10% OwnerPPurchaseClass A Common Stock+119.6K$1.44+$172.0K+1.4%8.63M after3 lots
Jul 8, 2024 (view filing)Jul 3-55 daysCEE Holdings Trust10% OwnerPPurchaseClass A Common Stock+2.60K$1.45+$3.77K0.0%8.51M after2 lots
Jul 2, 2024 (view filing)Jun 28-Jul 24 daysCEE Holdings Trust10% OwnerPPurchaseClass A Common Stock+164.5K$1.44+$236.4K+2.0%8.50M after3 lots
Jun 27, 2024 (view filing)Jun 25-272 daysCEE Holdings Trust10% OwnerPPurchaseClass A Common Stock+111.8K$1.42+$159.2K+1.4%8.34M after3 lots
Jun 26, 2024 (view filing)9:30 PM ETJun 179 daysLone Star Friends Trust and 1 other10% OwnerSSaleClass A Common Stock−4.78M$1.50−$7.16M−72.1%1.85M afterAmended
Jun 24, 2024 (view filing)Jun 20-244 daysCEE Holdings Trust10% OwnerPPurchaseClass A Common Stock+8.01K$1.44+$11.6K+0.1%8.23M after3 lots
Jun 21, 2024 (view filing)Jun 174 daysLateBlend L MichaelCEO & ChairmanSSaleClass A Common Stock−725.0K$1.50−$1.09M−100.0%0 after
Mar 19, 2024 (view filing)Mar 15-194 daysBlend Stanley10% OwnerPPurchaseClass A Common Stock+11.6K$1.42+$16.5K+0.2%6.63M after2 lots10b5-1
Mar 19, 2024 (view filing)Dec 15, 202395 daysBlend Stanley10% OwnerPPurchaseClass A Common Stock+880.3K$1.42+$1.25M+15.4%6.61M afterAmended
Dec 18, 2023 (view filing)7:32 PM ETDec 153 daysLone Star Friends Trust and 1 other10% OwnerPPurchaseClass A Common Stock+880.0K$1.42+$1.25M+15.3%6.61M after
Sep 7, 2023 (view filing)5:13 PM ETSep 61 dayCannae Holdings, LLC and 1 other10% OwnerSSaleClass A Common Stock−110.0K$1.85−$203.5K−0.4%27.0M after
Dec 9, 2022 (view filing)6:14 PM ETDec 72 daysLone Star Friends Trust and 1 other10% OwnerPPurchaseClass A Common Stock+2.15K$4.85+$10.4K0.0%5.73M after
Dec 2, 2022 (view filing)4:28 PM ETNov 302 daysLone Star Friends Trust and 1 other10% OwnerPPurchaseClass A Common Stock+6.11K$5.07+$31.0K+0.1%5.73M after
Nov 29, 2022 (view filing)6:06 PM ETNov 25-294 daysLone Star Friends Trust and 1 other10% OwnerPPurchaseClass A Common Stock+25.3K$5.04+$127.4K+0.4%5.72M after2 lots
Nov 23, 2022 (view filing)7:05 PM ETNov 21-222 daysLone Star Friends Trust and 1 other10% OwnerPPurchaseClass A Common Stock+39.5K$5.00+$197.2K+0.7%5.68M after2 lots
Nov 16, 2022 (view filing)7:45 PM ETNov 14-162 daysLone Star Friends Trust and 1 other10% OwnerPPurchaseClass A Common Stock+30.5K$4.71+$143.8K+0.5%5.64M after3 lots
Nov 16, 2022 (view filing)Nov 142 daysKidambi TridiveshChief Financial OfficerPPurchaseClass A Common Stock+15.9K$4.39+$70.0K+2.5%654.3K after
Sep 9, 2022 (view filing)8:35 PM ETSep 7-92 daysPhillips Christopher Stephen and 1 otherDirector, 10% OwnerSSaleClass A Common Stock−1.32M$10.03−$13.2M−6.6%18.7M after2 lots
Sep 2, 2022 (view filing)7:29 PM ETAug 31-Sep 22 daysPhillips Christopher Stephen and 1 otherDirector, 10% OwnerSSaleClass A Common Stock−253.7K$11.45−$2.91M−1.3%20.0M after3 lots
Aug 26, 2022 (view filing)8:29 PM ETAug 24-262 daysPhillips Christopher Stephen and 1 otherDirector, 10% OwnerSSaleClass A Common Stock−171.9K$11.07−$1.90M−0.8%20.3M after3 lots
Aug 23, 2022 (view filing)6:08 PM ETAug 194 daysPhillips Christopher Stephen and 1 otherDirector, 10% OwnerSSaleClass A Common Stock−19.5K$11.04−$215.3K−0.1%20.4M after
Aug 18, 2022 (view filing)4:15 PM ETAug 162 daysCannae Holdings, LLC and 1 other10% OwnerSSaleClass A Common Stock−50.0K$10.20−$509.9K−0.2%25.4M after
May 23, 2022 (view filing)5:25 PM ETMay 20-233 daysCannae Holdings, LLC and 1 other10% OwnerSSaleClass A Common Stock−216.2K$10.56−$2.28M−0.8%25.5M after2 lots
May 19, 2022 (view filing)5:08 PM ETMay 17-192 daysCannae Holdings, LLC and 1 other10% OwnerSSaleClass A Common Stock−82.7K$11.07−$915.1K−0.3%25.7M after3 lots
May 3, 2022 (view filing)7:02 PM ETApr 29-May 34 daysCannae Holdings, LLC and 1 other10% OwnerSSaleClass A Common Stock−462.9K$12.85−$5.95M−1.8%25.7M after4 lots
Apr 29, 2022 (view filing)5:01 PM ETApr 27-282 daysCannae Holdings, LLC and 1 other10% OwnerSSaleClass A Common Stock−190.0K$13.95−$2.65M−0.7%26.2M after2 lots
Apr 26, 2022 (view filing)5:00 PM ETApr 224 daysCannae Holdings, LLC and 1 other10% OwnerSSaleClass A Common Stock−50.9K$14.02−$714.0K−0.2%26.4M after
Apr 21, 2022 (view filing)9:47 PM ETApr 192 daysLone Star Friends Trust and 1 other10% OwnerSSaleClass A Common Stock−285.5K$20.14−$5.75M−9.4%2.75M after
Apr 21, 2022 (view filing)4:40 PM ETApr 19-202 daysCannae Holdings, LLC and 1 other10% OwnerSSaleClass A Common Stock−728.5K$14.00−$10.2M−2.7%26.5M after3 lots
Mar 7, 2022 (view filing)Jan 2838 daysKazerani MoujanDirectorPPurchaseClass A Common Stock+20.5K$10.31+$211.4KNew position20.5K afterAmended
Mar 7, 2022 (view filing)Jan 2838 daysKazerani MoujanDirectorPPurchaseClass A Common Stock+40.7K$1.02+$41.5K–40.7K afterAmendedDerivative
Mar 7, 2022 (view filing)Jan 2739 daysPhillips Christopher StephenDirector, 10% OwnerPPurchaseClass A Common Stock+500.0K–––500.0K afterAmendedDerivative