Power Solutions International
PSIX
193 hedge funds and large institutions have $393M invested in Power Solutions International in 2025 Q4 according to their latest regulatory filings, with 52 funds opening new positions, 93 increasing their positions, 31 reducing their positions, and 59 closing their positions.
200% more repeat investments, than reductions
Existing positions increased: 93 | Existing positions reduced: 31
11% more call options, than puts
Call options by funds: $13.4M | Put options by funds: $12.1M
6.04% more ownership
Funds ownership: 23.67% → 29.71% (+6%)
5% less funds holding
Funds holding: 203 → 193 (-10)
12% less first-time investments, than exits
New positions opened: 52 | Existing positions closed: 59
26% less capital invested
Capital invested by funds: $533M → $393M (-$140M)
100% less funds holding in top 10
Funds holding in top 10: 2 → 0 (-2)
Top Buyers
| 1 |
SA
Situational Awareness
San Francisco,
California
|
+$30.9M |
| 2 |
AP
Antipodes Partners
Royal Exchange,
Australia
|
+$16.3M |
| 3 |
Dimensional Fund Advisors
Austin,
Texas
|
+$12.8M |
| 4 |
Allspring Global Investments
Charlotte,
North Carolina
|
+$8.76M |
| 5 |
BlackRock
New York
|
+$8.71M |
Top Sellers
| 1 |
PCM
Portolan Capital Management
Boston,
Massachusetts
|
-$19.2M |
| 2 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$8.48M |
| 3 |
Invesco
Atlanta,
Georgia
|
-$6.62M |
| 4 |
GS
Gagnon Securities
New York
|
-$6.36M |
| 5 |
KC
Kadensa Capital
Central,
Hong Kong
|
-$5.86M |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
251
Northwestern Mutual Wealth Management
Milwaukee,
Wisconsin
| – | -$1.67K | -17 | Closed |
|
|
AAP
252
Arax Advisory Partners
Denver,
Colorado
| – | -$491 | -5 | Closed |
|
PSIX Hedge Fund Activity: Q4 2025 in Review
193 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in Power Solutions International (PSIX) for Q4 2025, worth a combined $393M — down 26% from $533M a quarter earlier.
Sellers outnumbered buyers: 59 funds closed out of PSIX and 52 opened new positions — a net loss of 7 holders — while 31 trimmed existing stakes and 93 added.
The largest buyer was Situational Awareness, opening a new position worth an estimated $30.9M. The largest seller was Portolan Capital Management, exiting entirely with an estimated $19.2M sold.
- 193 institutional investors held Power Solutions International (PSIX) as of Q4 2025, down from 203 in Q3 2025.
- Funds reported $393M of Power Solutions International stock for Q4 2025, down 26% quarter-over-quarter.
- 52 funds opened new Power Solutions International positions in Q4 2025 and 59 closed out, a net change of -7 holders.
- The largest Power Solutions International buyer in Q4 2025 was Situational Awareness, an estimated $30.9M added.
- The largest Power Solutions International seller in Q4 2025 was Portolan Capital Management, an estimated $19.2M sold.
Based on aggregated 13F filings for Q4 2025.