System1
30 hedge funds and large institutions have $22.5M invested in System1 in 2025 Q3 according to their latest regulatory filings, with 3 funds opening new positions, 5 increasing their positions, 14 reducing their positions, and 8 closing their positions.
35.44% more ownership
Funds ownership: 4.31% → 39.75% (+35%)
26% more capital invested
Capital invested by funds: $17.9M → $22.5M (+$4.59M)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
14% less funds holding
Funds holding: 35 → 30 (-5)
63% less first-time investments, than exits
New positions opened: 3 | Existing positions closed: 8
64% less repeat investments, than reductions
Existing positions increased: 5 | Existing positions reduced: 14
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Marshall Wace
London,
United Kingdom
|
+$251K |
| 2 |
XT
XTX Topco
George Town,
Cayman Islands
|
+$86.4K |
| 3 |
Citadel Advisors
Miami,
Florida
|
+$69.5K |
| 4 |
Cerity Partners
New York
|
+$52.4K |
| 5 |
Renaissance Technologies
New York
|
+$35.2K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Jane Street
New York
|
-$175K |
| 2 |
BlackRock
New York
|
-$103K |
| 3 |
Bank of America
Charlotte,
North Carolina
|
-$87.8K |
| 4 |
UBS Group
Zurich,
Switzerland
|
-$70.5K |
| 5 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$68.4K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
SS
26
SBI Securities
Tokyo,
Japan
| $422 | – | – | – |
|
27
JP Morgan Chase
New York
| $317 | -$663 | -96 | -68% |
|
28
Citigroup
New York
| $267 | +$7 | +1 | +3% |
|
29
Osaic Holdings
Scottsdale,
Arizona
| $255 | – | – | – |
|
|
WBC
30
West Branch Capital
Amherst,
Massachusetts
| $51 | – | – | – |
|
|
31
Jane Street
New York
| – | -$175K | -31,681 | Closed |
|
|
32
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
| – | -$68.4K | -12,374 | Closed |
|
|
HF
33
HRT Financial
New York
| – | -$65K | -11,870 | Closed |
|
|
SSG
34
Summit Securities Group
New York
| – | -$10.2K | -1,849 | Closed |
|
35
Wells Fargo
San Francisco,
California
| – | -$4.93K | -891 | Closed |
|
36
Russell Investments Group
London,
United Kingdom
| – | -$94 | -17 | Closed |
|
|
EWA
37
EverSource Wealth Advisors
Birmingham,
Alabama
| – | -$61 | -11 | Closed |
|
|
EP
38
Essential Partners
Rancho Santa Fe,
California
| – | -$6 | -1 | Closed |
|
SST Hedge Fund Activity: Q3 2025 in Review
30 of the 7,625 institutional investors tracked by Wall St. Rank reported a position in System1 (SST) for Q3 2025, worth a combined $22.5M — up 26% from $17.9M a quarter earlier.
Sellers outnumbered buyers: 8 funds closed out of SST and 3 opened new positions — a net loss of 5 holders — while 14 trimmed existing stakes and 5 added.
The largest buyer was Marshall Wace, opening a new position worth an estimated $251K. The largest seller was Jane Street, exiting entirely with an estimated $175K sold.
- 30 institutional investors held System1 (SST) as of Q3 2025, down from 35 in Q2 2025.
- Funds reported $22.5M of System1 stock for Q3 2025, up 26% quarter-over-quarter.
- 3 funds opened new System1 positions in Q3 2025 and 8 closed out, a net change of -5 holders.
- The largest System1 buyer in Q3 2025 was Marshall Wace, an estimated $251K added.
- The largest System1 seller in Q3 2025 was Jane Street, an estimated $175K sold.
Based on aggregated 13F filings for Q3 2025.