System1, Inc. (SST) Insider Ownership

Historic Insider Ownership Trends

System1's top three insider shareholders as of April 28, 2026 are Christopher Stephen Phillips (Director, 29.38Mn shares), Holdings, Inc. Cannae (TenPercentOwner, 27.01Mn shares), Holdings, Inc. Cannae (TenPercentOwner, 26.40Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Christopher Stephen Phillips - 0 29,375,499 01 Feb, 2022
Holdings, Inc. Cannae - 0 27,012,794 07 Sep, 2023
Holdings, Inc. Cannae - 0 26,402,297 26 Apr, 2022
Holdings, Inc. Cannae - 0 25,749,405 03 May, 2022
Holdings, Inc. Cannae - 0 25,666,724 19 May, 2022
Christopher Stephen Phillips - 0 18,672,586 09 Sep, 2022
Stanley Blend - 0 8,477,861 18 Dec, 2023
L Michael Blend - 0 8,448,338 01 Feb, 2022
Trebia, Lp Trasimene - 6,601,898 0 20 Apr, 2022
Star Friends Trust Lone - 5,731,423 0 09 Dec, 2022
Star Friends Trust Lone - 5,731,423 0 09 Dec, 2022
L Michael Blend - 0 5,447,175 01 Feb, 2022
Trebia Lp Bgpt - 4,450,879 0 20 Apr, 2022
Stanley Blend - 0 3,035,243 14 Aug, 2024
Stanley Blend - 0 2,500,000 27 Dec, 2024
Star Friends Trust Lone - 0 1,850,215 26 Jun, 2024
Star Friends Trust Lone - 0 1,850,215 26 Jun, 2024
Christopher Stephen Phillips - 0 939,541 21 Apr, 2022
Holdings Trust Cee - 919,555 0 26 Aug, 2025
Develop It Ltd Just - 725,000 0 07 Mar, 2022
Christopher Stephen Phillips - 0 725,000 07 Mar, 2022
Paul Filsinger President 540,868 0 02 Feb, 2022
Paul Filsinger President 459,399 0 17 Oct, 2022
Tridivesh Kidambi - 436,093 0 02 Feb, 2022
Charles Ursini President Coo 367,500 0 31 Jul, 2025
Charles Ursini President Coo 367,500 0 31 Jul, 2025
Brian Coppola Chief Product Officer 225,969 0 02 Feb, 2022
Jennifer Mindy Prince - 222,433 0 13 Jun, 2024
William Dexter Fowler - 218,433 0 13 Jun, 2024
Elizabeth Sestanovich Chief People Officer 208,595 0 02 Feb, 2022
Jennifer Lynn Robinson Chief Technology Officer 161,943 0 20 Aug, 2024
Christopher Stephen Phillips - 160,000 0 03 Aug, 2023
Tridivesh Kidambi Chief Financial Officer 146,515 0 17 Apr, 2026
Moujan Kazerani - 0 75,612 01 Feb, 2022
John Civantos - 70,613 0 05 Aug, 2025
Daniel J Weinrot General Counsel Secretary 69,394 0 29 Jan, 2026
Daniel J Weinrot General Counsel Secretary 69,053 0 17 Apr, 2026
Brian Coppola Chief Ad Operations Officer 65,898 0 17 Apr, 2026
Daniel J Weinrot General Counsel 59,642 0 31 Jan, 2022
Daniel J Weinrot General Counsel 59,642 0 31 Jan, 2022
Elizabeth Sestanovich Chief People Officer 58,948 0 17 Apr, 2026
Frank R Martire - 41,575 0 04 Aug, 2025
Moujan Kazerani - 40,292 0 04 Aug, 2025
Ryan R. Caswell - 38,577 0 04 Aug, 2025
Taryn Jogi Naidu - 38,562 0 04 Aug, 2025
Caroline Horn - 37,418 0 04 Aug, 2025
Tanmay Kumar - 35,196 0 04 Aug, 2025
Frank R Martire - 32,000 0 12 May, 2022
William P Ii Foley - 24,000 0 12 May, 2022
Moujan Kazerani - 0 20,500 07 Mar, 2022
Tridivesh Kidambi Chief Financial Officer 0 15,518 07 Mar, 2022

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
15 Apr, 2026 Tridivesh Kidambi Class A Common Stock A 26,910 $3.00 146,816 D P
15 Apr, 2026 Elizabeth Sestanovich Class A Common Stock D 341 $2.26 58,948 D F
15 Apr, 2026 Daniel J Weinrot Class A Common Stock D 341 $2.26 69,053 D F
15 Apr, 2026 Brian Coppola Class A Common Stock D 331 $2.26 65,898 D F
15 Apr, 2026 Tridivesh Kidambi Class A Common Stock D 301 $2.26 146,515 D F
28 Jan, 2026 Daniel J Weinrot Class A Common Stock D 211 $4.18 69,394 D F
28 Jan, 2026 Elizabeth Sestanovich Class A Common Stock D 211 $4.18 59,289 D F
28 Jan, 2026 Tridivesh Kidambi Class A Common Stock D 258 $4.18 119,906 D F
28 Jan, 2026 Daniel J Weinrot Class A Common Stock D 211 $4.18 69,394 D F
28 Jan, 2026 Brian Coppola Class A Common Stock D 231 $4.18 66,229 D F
15 Jan, 2026 Tridivesh Kidambi Class A Common Stock D 345 $4.40 120,164 D F
15 Jan, 2026 Elizabeth Sestanovich Class A Common Stock D 377 $4.40 59,500 D F
15 Jan, 2026 Daniel J Weinrot Class A Common Stock D 377 $4.40 69,605 D F
15 Jan, 2026 Brian Coppola Class A Common Stock D 371 $4.40 66,460 D F
15 Jan, 2026 Daniel J Weinrot Class A Common Stock D 377 $4.40 69,605 D F
28 Oct, 2025 Daniel J Weinrot Class A Common Stock D 214 $6.18 69,982 D F
28 Oct, 2025 Daniel J Weinrot Class A Common Stock D 214 $6.18 69,982 D F
28 Oct, 2025 Brian Coppola Class A Common Stock D 235 $6.18 66,831 D F
28 Oct, 2025 Tridivesh Kidambi Class A Common Stock D 263 $6.18 120,509 D F
28 Oct, 2025 Elizabeth Sestanovich Class A Common Stock D 158 $6.18 59,877 D F