Quick Takeaways
- SST - System1, Inc. has 26 insiders with reported activity on this page.
- Net insider value flow over the last year: +$287,613.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
Insider Transactions Reported by 26 Insiders of System1, Inc.
- Symbol
- SST on NYSE, SSTPW on OTC
- Location
- Marina Del Rey, CA
What Changed
- Buy value: $287,613; sell value: $0.
- Net share flow: +42,750.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Official SEC Source
Insider trading overview
Last 12 monthsNet insider flow leans to buying over the last 12 months. Net value: +$287,613.
Buys
$287,613
Shares: 42,750
Insiders: 1
Sells
$0
Shares: 0
Insiders: 0
Net
+$287,613
Shares: +42,750
Insiders: 1
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 42,750 | 0 | $287,613 | $0 | +$287,613 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
System1, Inc. executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| William P. Foley II | Director, 10%+ Owner | $133,445,586 | Mixed | 10 May 2022 | ||
| BGPT Trebia LP | Director, 10%+ Owner | $89,640,703 | Mixed | 19 Apr 2022 | ||
| Just Develop It Ltd | 10%+ Owner | $47,882,063 | Mixed | 28 Jan 2022 | ||
| Cannae Holdings, Inc. | 10%+ Owner | $44,030,854 | Mixed | 06 Sep 2023 | ||
| Stanley Blend | 10%+ Owner | $7,323,858 | Mixed | 24 Dec 2024 | ||
| CEE Holdings Trust | 10%+ Owner | $6,731,142 | +$287,613 | +4.5% | Filing P/S | 22 Aug 2025 |
| Lone Star Friends Trust | 10%+ Owner | $2,775,323 | Filing P/S | 17 Jun 2024 | ||
| Paul Filsinger | President | $748,820 | Mixed | 14 Oct 2022 | ||
| Tridivesh Kidambi | Chief Financial Officer | $501,207 | Mixed | 28 Jan 2026 | ||
| Jennifer Mindy Prince | Director | $367,014 | Mixed | 11 Jun 2024 | ||
| William Dexter Fowler | Director | $360,414 | Mixed | 11 Jun 2024 | ||
| Daniel J. Weinrot | General Counsel & Secretary | $290,066 | Mixed | 28 Jan 2026 | ||
| Brian Coppola | Chief Ad Operations Officer | $276,837 | Mixed | 28 Jan 2026 | ||
| Christopher Stephen Phillips | Director, 10%+ Owner | $260,800 | Mixed | 31 Jul 2023 | ||
| Elizabeth Sestanovich | Chief People Officer | $247,828 | Mixed | 28 Jan 2026 | ||
| Jennifer Lynn Robinson | Chief Technology Officer | $174,898 | Mixed | 15 Aug 2024 | ||
| Charles Ursini | President & COO, Director | $132,300 | Mixed | 29 Jul 2025 | ||
| John Civantos | Director | $25,420 | Mixed | 31 Jul 2025 | ||
| Frank R. Martire | Director | $14,967 | Mixed | 31 Jul 2025 | ||
| Moujan Kazerani | Director | $14,505 | Mixed | 31 Jul 2025 | ||
| Ryan R. Caswell | Director | $13,887 | Mixed | 31 Jul 2025 | ||
| Taryn Jogi Naidu | Director | $13,882 | Mixed | 31 Jul 2025 | ||
| Caroline Horn | Director | $13,470 | Mixed | 31 Jul 2025 | ||
| Tanmay Kumar | Director | $12,670 | Mixed | 31 Jul 2025 | ||
| L. Michael Blend | CEO & Chairman, Director | $0 | Mixed | 12 Aug 2024 | ||
| Trasimene Trebia, LP | Director, 10%+ Owner | Mixed | 13 Mar 2023 |
Top shareholders of System1, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| William P. Foley II |
3/4/5
13D/G
|
Director, 10%+ Owner |
4.8%
from 13D/G
|
6,625,898
|
$133,445,586 | — | 10 May 2022 | |
| BGPT Trebia LP |
3/4/5
|
Director, 10%+ Owner |
—
class O/S missing
|
4,450,879
|
$89,640,703 | — | 19 Apr 2022 | |
| Just Develop It Ltd |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
29,375,499
|
$47,882,063 | — | 28 Jan 2022 | |
| Cannae Holdings, Inc. |
3/4/5
13D/G
13F
|
10%+ Owner · Company |
4.4%
from 13D/G
|
27,012,794
|
$44,030,854 | — | 06 Sep 2023 | |
| Stanley Blend |
3/4/5
|
10%+ Owner |
—
mixed-class rows
|
6,975,103
mixed-class rows
|
$7,323,858 | — | 24 Dec 2024 | |
| CEE Holdings Trust |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
919,555
|
$6,731,142 | +$287,613 | 22 Aug 2025 | |
| Lone Star Friends Trust |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
1,850,215
|
$2,775,323 | — | 17 Jun 2024 | |
| Blend Family Foundation |
13D/G
|
The Blend Family Foundation |
7%
|
5,545,077
|
$2,107,129 | $0 | 02 May 2025 | |
| Paul Filsinger |
3/4/5
|
President |
—
class O/S missing
|
459,399
|
$748,820 | — | 14 Oct 2022 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
—
class O/S missing
|
161,546
|
$633,260 | — | 31 Dec 2025 | |
| Tridivesh Kidambi |
3/4/5
|
Chief Financial Officer |
—
mixed-class rows
|
191,906
mixed-class rows
|
$501,207 | — | 28 Jan 2026 | |
| Cerity Partners LLC |
13F
|
Company |
—
class O/S missing
|
116,844
|
$458,028 | — | 31 Dec 2025 | |
| Jennifer Mindy Prince |
3/4/5
|
Director |
—
class O/S missing
|
222,433
|
$367,014 | — | 11 Jun 2024 | |
| William Dexter Fowler |
3/4/5
|
Director |
—
class O/S missing
|
218,433
|
$360,414 | — | 11 Jun 2024 | |
| Daniel J. Weinrot |
3/4/5
|
General Counsel & Secretary |
—
class O/S missing
|
69,394
|
$290,066 | — | 28 Jan 2026 | |
| Brian Coppola |
3/4/5
|
Chief Ad Operations Officer |
—
class O/S missing
|
66,229
|
$276,837 | — | 28 Jan 2026 | |
| Christopher Stephen Phillips |
3/4/5
|
Director, 10%+ Owner |
—
class O/S missing
|
160,000
|
$260,800 | — | 31 Jul 2023 | |
| Elizabeth Sestanovich |
3/4/5
|
Chief People Officer |
—
class O/S missing
|
59,289
|
$247,828 | — | 28 Jan 2026 | |
| VANGUARD GROUP INC |
13F
|
Company |
—
class O/S missing
|
46,933
|
$183,977 | — | 31 Dec 2025 | |
| Jennifer Lynn Robinson |
3/4/5
|
Chief Technology Officer |
—
class O/S missing
|
161,943
|
$174,898 | — | 15 Aug 2024 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
—
class O/S missing
|
35,449
|
$138,960 | — | 31 Dec 2025 | |
| Charles Ursini |
3/4/5
|
President & COO, Director |
4.5%
|
367,500
|
$132,300 | — | 29 Jul 2025 | |
| BlackRock, Inc. |
13F
|
Company |
—
class O/S missing
|
24,247
|
$95,049 | — | 31 Dec 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
—
class O/S missing
|
18,620
|
$72,990 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
—
class O/S missing
|
14,363
|
$56,327 | — | 31 Dec 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
—
class O/S missing
|
12,759
|
$50,015 | — | 31 Dec 2025 | |
| XTX Topco Ltd |
13F
|
Company |
—
class O/S missing
|
12,376
|
$48,514 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
—
class O/S missing
|
11,502
|
$45,088 | — | 31 Dec 2025 | |
| John Civantos |
3/4/5
|
Director |
0.87%
|
70,613
|
$25,420 | — | 31 Jul 2025 | |
| Frank R. Martire |
3/4/5
|
Director |
0.51%
|
41,575
|
$14,967 | — | 31 Jul 2025 | |
| Moujan Kazerani |
3/4/5
|
Director |
0.5%
|
40,292
|
$14,505 | — | 31 Jul 2025 | |
| Ryan R. Caswell |
3/4/5
|
Director |
0.47%
|
38,577
|
$13,887 | — | 31 Jul 2025 | |
| Taryn Jogi Naidu |
3/4/5
|
Director |
0.47%
|
38,562
|
$13,882 | — | 31 Jul 2025 | |
| Caroline Horn |
3/4/5
|
Director |
0.46%
|
37,418
|
$13,470 | — | 31 Jul 2025 | |
| Tanmay Kumar |
3/4/5
|
Director |
0.43%
|
35,196
|
$12,670 | — | 31 Jul 2025 | |
| FMR LLC |
13F
|
Company |
—
class O/S missing
|
1,105
|
$4,332 | — | 31 Dec 2025 | |
| Tower Research Capital LLC (TRC) |
13F
|
Company |
—
class O/S missing
|
988
|
$3,873 | — | 31 Dec 2025 | |
| GROUP ONE TRADING LLC |
13F
|
Company |
—
class O/S missing
|
663
|
$2,599 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
—
class O/S missing
|
439
|
$1,721 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
—
class O/S missing
|
417
|
$1,635 | — | 31 Dec 2025 | |
| Farther Finance Advisors, LLC |
13F
|
Company |
—
class O/S missing
|
150
|
$588 | — | 31 Dec 2025 | |
| BNP PARIBAS FINANCIAL MARKETS |
13F
|
Company |
—
class O/S missing
|
86
|
$337 | — | 31 Dec 2025 | |
| SBI Securities Co., Ltd. |
13F
|
Company |
—
class O/S missing
|
60
|
$235 | — | 31 Dec 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
—
class O/S missing
|
42
|
$165 | — | 31 Dec 2025 | |
| OSAIC HOLDINGS, INC. |
13F
|
Company |
—
class O/S missing
|
35
|
$137 | — | 31 Dec 2025 | |
| L. Michael Blend |
3/4/5
|
CEO & Chairman, Director |
—
class O/S missing
|
2,500,000
|
— | — | 12 Aug 2024 |
Recent Insider Transactions by Companies or Individuals for System1, Inc.
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Tridivesh Kidambi | SST | Class A Common Stock | Tax liability | -0.21% | -258 | 119,906 | 28 Jan 2026 | Direct | ||
| Elizabeth Sestanovich | SST | Class A Common Stock | Tax liability | -0.35% | -211 | 59,289 | 28 Jan 2026 | Direct | ||
| Brian Coppola | SST | Class A Common Stock | Tax liability | -0.35% | -231 | 66,229 | 28 Jan 2026 | Direct | ||
| Daniel J. Weinrot | SST | Class A Common Stock | Tax liability | -0.3% | -211 | 69,394 | 28 Jan 2026 | Direct | ||
| Tridivesh Kidambi | SST | Class A Common Stock | Tax liability | -0.29% | -345 | 120,164 | 15 Jan 2026 | Direct | ||
| Elizabeth Sestanovich | SST | Class A Common Stock | Tax liability | -0.63% | -377 | 59,500 | 15 Jan 2026 | Direct | ||
| Brian Coppola | SST | Class A Common Stock | Tax liability | -0.56% | -371 | 66,460 | 15 Jan 2026 | Direct | ||
| Daniel J. Weinrot | SST | Class A Common Stock | Tax liability | -0.54% | -377 | 69,605 | 15 Jan 2026 | Direct | ||
| Tridivesh Kidambi | SST | Class A Common Stock | Tax liability | -0.22% | -263 | 120,509 | 28 Oct 2025 | Direct | ||
| Elizabeth Sestanovich | SST | Class A Common Stock | Tax liability | -0.26% | -158 | 59,877 | 28 Oct 2025 | Direct | ||
| Brian Coppola | SST | Class A Common Stock | Tax liability | -0.35% | -235 | 66,831 | 28 Oct 2025 | Direct | ||
| Daniel J. Weinrot | SST | Class A Common Stock | Tax liability | -0.3% | -214 | 69,982 | 28 Oct 2025 | Direct | ||
| Brian Coppola | SST | Class A Common Stock | Tax liability | -0.56% | -377 | 67,066 | 15 Oct 2025 | Direct | ||
| Tridivesh Kidambi | SST | Class A Common Stock | Tax liability | -0.29% | -352 | 120,772 | 15 Oct 2025 | Direct | ||
| Elizabeth Sestanovich | SST | Class A Common Stock | Tax liability | -0.47% | -282 | 60,035 | 15 Oct 2025 | Direct | ||
| Daniel J. Weinrot | SST | Class A Common Stock | Tax liability | -0.54% | -382 | 70,196 | 15 Oct 2025 | Direct | ||
| CEE Holdings Trust | SST | Class A Common Stock | Purchase | 1.21% | $80,630 | $7.32 | 11,015 | 919,555 | 22 Aug 2025 | Direct |
| CEE Holdings Trust | SST | Class A Common Stock | Purchase | 1.4% | $86,830 | $6.90 | 12,584 | 908,540 | 21 Aug 2025 | Direct |
| CEE Holdings Trust | SST | Class A Common Stock | Purchase | 1.42% | $78,650 | $6.25 | 12,584 | 895,956 | 20 Aug 2025 | Direct |
| CEE Holdings Trust | SST | Class A Common Stock | Purchase | 0.75% | $41,503 | $6.32 | 6,567 | 883,372 | 19 Aug 2025 | Direct |
| Frank Martire Jr. | SST | Class A Common Stock | Award | 56.4% | 15,000 | 41,575 | 31 Jul 2025 | Direct | ||
| Ryan R. Caswell | SST | Class A Common Stock | Award | 63.6% | 15,000 | 38,577 | 31 Jul 2025 | Direct | ||
| Tanmay Kumar | SST | Class A Common Stock | Award | 74.3% | 15,000 | 35,196 | 31 Jul 2025 | Direct | ||
| Taryn Jogi Naidu | SST | Class A Common Stock | Award | 63.7% | 15,000 | 38,562 | 31 Jul 2025 | Direct | ||
| Moujan Kazerani | SST | Class A Common Stock | Award | 59.3% | 15,000 | 40,292 | 31 Jul 2025 | Direct | ||
| John Civantos | SST | Class A Common Stock | Award | 27% | 15,000 | 70,613 | 31 Jul 2025 | Direct | ||
| Caroline Horn | SST | Class A Common Stock | Award | 66.9% | 15,000 | 37,418 | 31 Jul 2025 | Direct | ||
| Charles Ursini | SST | Class A Common Stock | Award | 1125% | 337,500 | 367,500 | 29 Jul 2025 | Direct | ||
| Tridivesh Kidambi | SST | Class A Common Stock | Award | 70.3% | 50,000 | 121,124 | 29 Jul 2025 | Direct | ||
| Tridivesh Kidambi | SST | Stock Appreciation Rights | Award | 38.5% | 20,000 | 72,000 | 29 Jul 2025 | Direct | ||
| Brian Coppola | SST | Class A Common Stock | Award | 145.8% | 40,000 | 67,443 | 29 Jul 2025 | Direct | ||
| Elizabeth Sestanovich | SST | Class A Common Stock | Award | 196.9% | 40,000 | 60,317 | 29 Jul 2025 | Direct | ||
| Daniel J. Weinrot | SST | Class A Common Stock | Award | 290.4% | 52,500 | 70,578 | 29 Jul 2025 | Direct | ||
| Tridivesh Kidambi | SST | Class A Common Stock | Tax liability | -0.31% | -224 | 71,124 | 28 Jul 2025 | Direct | ||
| Brian Coppola | SST | Class A Common Stock | Tax liability | -0.75% | -206 | 27,443 | 28 Jul 2025 | Direct | ||
| Elizabeth Sestanovich | SST | Class A Common Stock | Tax liability | -0.66% | -135 | 20,317 | 28 Jul 2025 | Direct | ||
| Daniel J. Weinrot | SST | Class A Common Stock | Tax liability | -1.05% | -191 | 18,078 | 28 Jul 2025 | Direct | ||
| Tridivesh Kidambi | SST | Class A Common Stock | Tax liability | -0.42% | -300 | 71,348 | 15 Jul 2025 | Direct | ||
| Brian Coppola | SST | Class A Common Stock | Tax liability | -1.18% | -330 | 27,649 | 15 Jul 2025 | Direct | ||
| Elizabeth Sestanovich | SST | Class A Common Stock | Tax liability | -1.16% | -240 | 20,452 | 15 Jul 2025 | Direct | ||
| Daniel J. Weinrot | SST | Class A Common Stock | Tax liability | -1.83% | -341 | 18,269 | 15 Jul 2025 | Direct | ||
| John Civantos | SST | Class A Common Stock | Purchase | 12.4% | 6,158 | 55,613 | 13 Jun 2025 | Direct | ||
| John Civantos | SST | Class A Common Stock | Purchase | 61.6% | 18,842 | 49,455 | 12 Jun 2025 | Direct | ||
| Tridivesh Kidambi | SST | Warrants (right to buy) | Sale | -100% | -15,000 | 0 | 09 Jun 2025 | Direct | ||
| Tridivesh Kidambi | SST | Class A Common Stock | Tax liability | -0.31% | -2,237 | 716,488 | 28 Apr 2025 | Direct | ||
| Brian Coppola | SST | Class A Common Stock | Tax liability | -0.73% | -2,052 | 279,799 | 28 Apr 2025 | Direct | ||
| Elizabeth Sestanovich | SST | Class A Common Stock | Tax liability | -0.64% | -1,342 | 206,929 | 28 Apr 2025 | Direct | ||
| Daniel J. Weinrot | SST | Class A Common Stock | Tax liability | -1.01% | -1,905 | 186,106 | 28 Apr 2025 | Direct | ||
| Elizabeth Sestanovich | SST | Class A Common Stock | Tax liability | -1.14% | -2,398 | 208,271 | 15 Apr 2025 | Direct | ||
| Brian Coppola | SST | Class A Common Stock | Tax liability | -1.16% | -3,300 | 281,851 | 15 Apr 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.