Comparable stake leader
Blend Family Foundation
SEC ownership of System1, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001805833.
Disclosed value leader
William P. Foley II
Comparable rows
11/49
Latest evidence
15 Jul 2026
- Public ticker
- SST on NYSE, SSTPW on OTC
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Blend Family Foundation
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
11 of 49
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Blend Family Foundation
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
15 Jul 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001805833
- Issuer location
- Marina Del Rey, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of System1, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Blend Family Foundation
Disclosed value leader
William P. Foley II
Comparable rows
11/49
Latest evidence
15 Jul 2026
13D/G
3/4/5
13F
Lead comparable stake: 7%
38 rows are not safely comparable across share classes.
13D/G row: Blend Family Foundation
Showing 1-8 of 49 holder rows.
Quick read
Blend Family Foundation leads the comparable SEC ownership view at 7%.
11 of 49 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Blend Family Foundation's linked filing trail.
Comparable ownership
Top 5
Blend Family Foundation
7%
William P. Foley II
4.8%
Cannae Holdings, Inc.
4.4%
Charles Ursini
4.5%
John Civantos
0.87%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 49 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Blend Family Foundation |
13D/G
The Blend Family Foundation
|
7%
|
$2,107,129
5,545,077 shares
|
$0 | 02 May 2025 |
| William P. Foley II |
3/4/5
13D/G
Director, 10%+ Owner
|
4.8%
from 13D/G
|
$133,445,586
6,625,898 shares
|
— | 10 May 2022 |
| Cannae Holdings, Inc. |
3/4/5
13D/G
13F
10%+ Owner · Company
|
4.4%
from 13D/G
|
$44,030,854
27,012,794 shares
|
— | 06 Sep 2023 |
| Charles Ursini |
3/4/5
President & COO, Director
|
4.5%
|
$132,300
367,500 shares
|
— | 29 Jul 2025 |
| John Civantos |
3/4/5
Director
|
0.87%
|
$25,420
70,613 shares
|
— | 31 Jul 2025 |
| Frank R. Martire |
3/4/5
Director
|
0.51%
|
$14,967
41,575 shares
|
— | 31 Jul 2025 |
| Moujan Kazerani |
3/4/5
Director
|
0.5%
|
$14,505
40,292 shares
|
— | 31 Jul 2025 |
| Ryan R. Caswell |
3/4/5
Director
|
0.47%
|
$13,887
38,577 shares
|
— | 31 Jul 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to buying over the last 12 months. Net value: +$368,343.
Buys
$368,343
Insiders: 2
Sells
$0
Insiders: 0
Net
+$368,343
Shares: +69,660
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 69,660
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 26,910 | 0 | $80,730 | $0 | +$80,730 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 42,750 | 0 | $287,613 | $0 | +$287,613 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 26 reporting-owner rows connected to System1, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
26
Largest Forms 3/4/5 holder
William P. Foley II
Net 12M change
+$368,343
Latest report
15 Jul 2026
| 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 | $549,081 | +$80,730 | +17% | Mixed | 15 Jul 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 | $284,498 | Mixed | 15 Jul 2026 | ||
| Brian Coppola | Chief Ad Operations Officer | $271,499 | Mixed | 15 Jul 2026 | ||
| Christopher Stephen Phillips | Director, 10%+ Owner | $260,800 | Mixed | 31 Jul 2023 | ||
| Elizabeth Sestanovich | Chief People Officer | $242,865 | Mixed | 15 Jul 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 |
Recent insider transactions for System1, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Elizabeth Sestanovich | SST | Class A Common Stock | Tax liability | -12% | -7,058 | 51,890 | 15 Jul 2026 | Direct | ||
| Brian Coppola | SST | Class A Common Stock | Tax liability | -9.29% | -6,124 | 59,774 | 15 Jul 2026 | Direct | ||
| Tridivesh Kidambi | SST | Class A Common Stock | Tax liability | -3.31% | -6,022 | 175,793 | 15 Jul 2026 | Direct | ||
| Daniel J. Weinrot | SST | Class A Common Stock | Tax liability | -13.3% | -9,156 | 59,897 | 15 Jul 2026 | Direct | ||
| Tridivesh Kidambi | SST | Class A Common Stock | Award | 24.1% | 35,300 | 181,815 | 29 May 2026 | Direct | ||
| Tridivesh Kidambi | SST | Class A Common Stock | Tax liability | -0.21% | -301 | 146,515 | 15 Apr 2026 | Direct | ||
| Tridivesh Kidambi | SST | Class A Common Stock | Purchase | 22.4% | $80,730 | $3.00 | 26,910 | 146,816 | 15 Apr 2026 | Direct |
| Elizabeth Sestanovich | SST | Class A Common Stock | Tax liability | -0.58% | -341 | 58,948 | 15 Apr 2026 | Direct | ||
| Brian Coppola | SST | Class A Common Stock | Tax liability | -0.5% | -331 | 65,898 | 15 Apr 2026 | Direct | ||
| Daniel J. Weinrot | SST | Class A Common Stock | Tax liability | -0.49% | -341 | 69,053 | 15 Apr 2026 | Direct | ||
| 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 |
* marks a reported price that did not pass the local price check.