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
13F holders, Q3 2025
Institutional positions in System1, Inc. as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 30
- −6 vs. Q2 2025
- Shares held
- 3.20M
- −43.8K (−1.4%) vs. Q2 2025
- Total value
- $22.5M
- +$4.59M (+25.6%) vs. Q2 2025
- New holders
- 3
- 5 more added
- Sold out
- 9
- 14 more reduced
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting SST on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 21 | $1.38M |
| Q1 2026 | 25 | $2.50M |
| Q4 2025 | 24 | $3.20M |
| Q3 2025 | 30 | $22.5M |
| Q2 2025 | 36 | $17.9M |
| Q1 2025 | 55 | $13.2M |
| Q4 2024 | 59 | $31.6M |
| Q3 2024 | 60 | $39.1M |
| Q2 2024 | 60 | $53.0M |
| Q1 2024 | 47 | $69.4M |
| Q4 2023 | 49 | $76.8M |
| Q3 2023 | 48 | $41.6M |
| Q2 2023 | 44 | $154.8M |
| Q1 2023 | 34 | $138.1M |
| Q4 2022 | 30 | $133.5M |
| Q3 2022 | 38 | $182.2M |
| Q2 2022 | 37 | $193.0M |
| Q1 2022 | 31 | $421.1M |
| Q4 2021 | 1 | $9.79M |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding System1, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Cannae Holdings, Inc. | 2,701,279 | $19.0M | 10.04% | 00.0% | Unchanged |
| Bank of America Corp | 161,570 | $1.14M | 0.00% | −12,719−7.3% | Reduced |
| Cerity Partners LLC | 116,867 | $822.7K | 0.00% | +7,581+6.9% | Added |
| Vanguard Group Inc | 46,933 | $330.4K | 0.00% | −373−0.8% | Reduced |
| Millennium Management LLC | 38,561 | $271.5K | 0.00% | −4,217−9.9% | Reduced |
| Marshall Wace, LLP | 36,271 | $255.3K | 0.00% | +36,271 | New |
| BlackRock, Inc. | 24,210 | $170.4K | 0.00% | −14,912−38.1% | Reduced |
| Renaissance Technologies LLC | 17,120 | $120.5K | 0.00% | +5,100+42.4% | Added |
| Geode Capital Management, LLC | 14,381 | $101.3K | 0.00% | −7,149−33.2% | Reduced |
| XTX Topco Ltd | 12,504 | $88.0K | 0.00% | +12,504 | New |
| State Street Corp | 11,502 | $81.0K | 0.00% | 00.0% | Unchanged |
| Citadel Advisors LLC | 10,056 | $70.8K | 0.00% | +10,056 | New |
| FMR LLC | 1,920 | $13.5K | 0.00% | −3−0.2% | Reduced |
| Royal Bank of Canada | 1,394 | $10.0K | 0.00% | +1,143+455.4% | Added |
| Morgan Stanley | 1,095 | $7.71K | 0.00% | −264−19.4% | Reduced |
| Group One Trading, L.P. | 721 | $5.08K | 0.00% | −1,353−65.2% | Reduced |
| Tower Research Capital LLC (TRC) | 640 | $4.51K | 0.00% | −1,940−75.2% | Reduced |
| UBS Group AG | 436 | $3.07K | 0.00% | −10,213−95.9% | Reduced |
| Farther Finance Advisors, LLC | 150 | $1.06K | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 128 | $1.00K | 0.00% | −110−46.2% | Reduced |
| BNP Paribas Arbitrage, SA | 122 | $859 | 0.00% | −4,389−97.3% | Reduced |
| Strategic Wealth Partners, Ltd. | 100 | $704 | 0.00% | 00.0% | Unchanged |
| Barclays PLC | 86 | $605 | 0.00% | −104−54.7% | Reduced |
| GAMMA Investing LLC | 76 | $535 | 0.00% | +40+111.1% | Added |
| Nisa Investment Advisors, LLC | 64 | $451 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 60 | $422 | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 45 | $317 | 0.00% | −96−68.1% | Reduced |
| Citigroup Inc | 38 | $267 | 0.00% | +1+2.7% | Added |
| Advisor Group Holdings, Inc. | 35 | $255 | 0.00% | 00.0% | Unchanged |
| West Branch Capital LLC | 115 | $51 | 0.00% | 00.0% | Unchanged |
| Rhumbline Advisers | 0 | $0 | 0.00% | 0 | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −31,681−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −12,374−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −11,870−100.0% | Sold out |
| Clear Street Markets LLC | 0 | $0 | 0.00% | −1,849−100.0% | Sold out |
| Wells Fargo & Company | 0 | $0 | 0.00% | −891−100.0% | Sold out |
| Russell Investments Group, Ltd. | 0 | $0 | 0.00% | −17−100.0% | Sold out |
| EverSource Wealth Advisors, LLC | 0 | $0 | 0.00% | −11−100.0% | Sold out |
| Essential Partners LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |