SYSTEM1SST
13F holders, Q1 2026 (March 31)At the end of Q1 2026, 25 institutions reported holding SYSTEM1 Inc. (SST) in their 13F filings, up 1 from Q4 2025. 3 opened new positions and 4 sold out. The largest holders were Cannae Holdings, Inc. ($1.1M), Bank of America Corp. ($488K) and Cerity Partners LLC ($353K). 2 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio) and Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- SYSTEM1 Inc.
- CUSIP
- 87200P208
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 3 | $57K |
| Exits | 4 | $105K |
All 13F filers, Q4 2025 → Q1 2026: 41,524 shares bought and 30,346 shares sold, net +11,178 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 25 holders
| Cannae Holdings, Inc. | 4.39% | No change | 356,797 | $1.1M |
| Bank of America Corp. | 0.00% | Reduce -0.0% | 161,519 | $488K |
| Cerity Partners LLC | 0.00% | No change | 116,844 | $353K |
| Vanguard Capital Management LLC | 0.00% | — | 37,132 | $112K |
| Millennium Management | 0.00% | Reduce -8.0% | 32,619 | $99K |
| BlackRock, Inc. | 0.00% | No change | 24,247 | $73K |
| Geode Capital Management, LLC | 0.00% | Add +66.0% | 23,839 | $72K |
| NINE MASTS CAPITAL Ltd | 0.01% | New | 18,548 | $56K |
| Renaissance Technologies | 0.00% | Reduce -1.6% | 18,320 | $55K |
| State Street Corp. | 0.00% | No change | 11,502 | $35K |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 9,141 | $28K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +642.1% | 7,332 | $22K |
| JPMorgan Chase & Co. | 0.00% | Add +13923.8% | 5,890 | $18K |
| UBS Group AG | 0.00% | Add +217.5% | 1,324 | $4K |
| Vanguard Global Advisers, LLC | 0.00% | — | 660 | $2K |
| Physician Wealth Advisors, Inc. | 0.00% | New | 301 | $910 |
| Farther Finance Advisors, LLC | 0.00% | No change | 150 | $783 |
| Group One Trading LLC | 0.00% | Reduce -66.4% | 223 | $673 |
| Cwm, LLC | 0.00% | Reduce -0.9% | 114 | $344 |
| Strategic Wealth Partners, Ltd. | 0.00% | No change | 100 | $302 |
| SHP Wealth Management | 0.00% | New | 100 | $302 |
| BNP Paribas Financial Markets | 0.00% | No change | 86 | $260 |
| SBI Securities Co., Ltd. | 0.00% | No change | 60 | $181 |
| Osaic Holdings, Inc. | 0.00% | No change | 35 | $105 |
| Royal Bank of Canada | 0.00% | Reduce -63.9% | 39 | $0 |
"% of holder's portfolio" is SST's weight in each manager's 13F, not the share of SYSTEM1 Inc. the manager owns.