Security key
87200P109
System1, Inc. - Class A Common Stock, par value $0.0001 per share (SST)
CUSIP: 87200P109
Q3 2025 13F Holders as of 30 Sep 2025
- Security type / class
- Equity / Class A Common Stock, par value $0.0001 per share
- Total 13F shares
- 38,866
- Total 13F value
- $43,530
- Share change
- +38,866
- SEC-reported price per share
- $1.12
- Number of holders
- 1
- Value change
- +$43,530
- Number of buys
- 1
- Shares outstanding
- 8,134,854
Holder snapshot
5 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2025
Institutions
1
Top holders
0
SST full security history
Ownership snapshot
Newer quarter: Q4 2025
System1, Inc. SEC filings
System1, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 87200P109
Recent filing periods:
Ownership snapshot
Top reported holders of SST - System1, Inc. - Class A Common Stock, par value $0.0001 per share (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
9/15
Latest evidence
22 Aug 2025
13D/G
3/4/5
13F
Lead comparable stake: 7%
6 rows are not safely comparable across share classes.
13D/G row: Blend Family Foundation
Showing 1-6 of 15 holder rows.
Quick read
Blend Family Foundation leads the comparable SEC ownership view at 7%.
9 of 15 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%
Charles Ursini
4.5%
John Civantos
0.87%
Frank R. Martire
0.51%
Moujan Kazerani
0.5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 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 |
| 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.
Archived quarter
Historical 13F summary for Q3 2025
This older quarter remains available as an indexed ownership summary. Detailed holder rows are no longer kept in the hot table for this period.