Who Owns System1, Inc. (SST)?Hedge Fund & Institutional Holders
Institutional Holders
31
as of Q4 2025
Total Institutional Value
$1.39864420001e+33T
% of Float Held
—
QoQ Change in Holders
+4 / -5
Price History
SST — Biggest New Institutional Buyers This Quarter
| Fund | Action | Shares Added | Value Added |
|---|---|---|---|
| Cannae Holdings, Inc. | New Position | +357K | +$1.4B |
| CWM, LLC | New Position | +115 | +$0 |
| Cerity Partners LLC | New Position | +117K | +$0 |
| SBI Securities Co., Ltd. | New Position | +60 | +$0 |
| BlackRock, Inc. | Increased | +37 | +$-170K |
| Tower Research Capital LLC (TRC) | Increased | +348 | +$-4.5M |
| CITADEL ADVISORS LLC | Increased | +3K | +$-70.8M |
| RENAISSANCE TECHNOLOGIES LLC | Increased | +2K | +$-120.5M |
SST — Institutions Reducing or Closing Positions
| Fund | Action | Shares Sold | Value Sold |
|---|---|---|---|
| MILLENNIUM MANAGEMENT LLC | Decreased | -3K | -$271.5M |
| MARSHALL WACE, LLP | Closed Position | -36K | -$255.3M |
| XTX Topco Ltd | Decreased | -128 | -$88.0M |
| ROYAL BANK OF CANADA | Decreased | -1K | -$10.0M |
| GROUP ONE TRADING LLC | Decreased | -58 | -$3.1M |
| UBS Group AG | Decreased | -19 | -$2.1M |
| BANK OF AMERICA CORP /DE/ | Decreased | -24 | -$1.1M |
| BARCLAYS PLC | Closed Position | -86 | -$605K |
| GAMMA Investing LLC | Closed Position | -76 | -$535K |
| CITIGROUP INC | Closed Position | -38 | -$267K |
| FMR LLC | Decreased | -815 | -$13K |
| MORGAN STANLEY | Decreased | -656 | -$7K |
| RHUMBLINE ADVISERS | Closed Position | -0 | -$0 |
| BNP PARIBAS FINANCIAL MARKETS | Decreased | -36 | -$0 |
| GEODE CAPITAL MANAGEMENT, LLC | Decreased | -18 | -$0 |
Top Institutional Holders(Q4 2025)
SST Institutional Ownership History
| Quarter | Holders | Total Value | Change |
|---|---|---|---|
| Q4 2025 | 23 | $1.4B | -2 |
| Q3 2025 | 25 | $833.3M | -4 |
| Q2 2025 | 29 | $16.6B | -27 |
| Q1 2025 | 56 | $12.8B | -2 |
| Q4 2024 | 58 | $29.5B | +1 |
| Q3 2024 | 57 | $224.3B | +0 |
| Q2 2024 | 57 | $271.4B | +14 |
| Q1 2024 | 43 | $85.1T | — |
Similar Stocks by Institutional Ownership
As of Q4 2025, 31 institutional investors hold SST (System1, Inc.). The largest holder is Cannae Holdings, Inc. with $1.4B in shares. This quarter, 4 institutions opened new positions and 5 closed their positions.
Frequently Asked Questions
How many hedge funds own SST?
As of Q4 2025, 31 institutional investors report holding SST (System1, Inc.) in their 13F filings.
Who is the largest institutional holder of SST?
The largest institutional holder of SST is Cannae Holdings, Inc. with $1.4B in shares.
Is institutional ownership of SST increasing or decreasing?
This quarter, 4 institutions opened new positions in SST and 5 closed their positions.