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
Q2 2026 vs. Q1 2026
How the institutions holding System1, Inc. changed between Q1 2026 and Q2 2026.
All holders in Q2 2026All holders in Q1 2026
| Measure | Q1 2026 | Of which not filed for Q2 2026 | Q2 2026 | Change |
|---|---|---|---|---|
| Holders | 25 | 1 | 21 | −3 |
| Shares | 826.9K | 114 | 597.9K | −228.9K (−27.7%) |
| Value | $2.50M | $344 | $1.38M | −$1.12M (−44.7%) |
1 institution that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so the changes leave them out.
New holders (7)
Institutions that held System1, Inc. at the end of Q2 2026 but not at the end of Q1 2026.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| Crescent Grove Advisors, LLC | 75,545 | $174.5K | 0.01% |
| Morgan Stanley | 13,134 | $30.3K | 0.00% |
| Leonteq Securities AG | 12,500 | $28.9K | 0.00% |
| Price T Rowe Associates Inc | 11,731 | $28.0K | 0.00% |
| Jones Financial Companies LLLP | 366 | $919 | 0.00% |
| Barclays PLC | 9 | $21 | 0.00% |
| Signaturefd, LLC | 1 | $2 | 0.00% |
Sold out (10)
Institutions that held System1, Inc. at the end of Q1 2026 and filed for Q2 2026 without it.
| Institution | Shares, Q1 2026 | Value, Q1 2026 |
|---|---|---|
| Cannae Holdings, Inc. | 356,797 | $1.08M |
| Millennium Management LLC | 32,619 | $98.5K |
| Nine Masts Capital Ltd | 18,548 | $56.0K |
| Renaissance Technologies LLC | 18,320 | $55.3K |
| Tower Research Capital LLC (TRC) | 7,332 | $22.1K |
| Vanguard Global Advisers, LLC | 660 | $1.99K |
| UMA Financial Services, Inc. | 301 | $910 |
| Farther Finance Advisors, LLC | 150 | $783 |
| Strategic Wealth Partners, Ltd. | 100 | $302 |
| SHP Wealth Management | 100 | $302 |
Not filed for Q2 2026 yet (1)
Institutions that held System1, Inc. at the end of Q1 2026 and haven't filed a 13F for Q2 2026. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q1 2026 | Value, Q1 2026 |
|---|---|---|
| CWM, LLC | 114 | $344 |