Power Solutions International
PSIX
126 hedge funds and large institutions have $226M invested in Power Solutions International in 2025 Q2 according to their latest regulatory filings, with 73 funds opening new positions, 33 increasing their positions, 17 reducing their positions, and 13 closing their positions.
462% more first-time investments, than exits
New positions opened: 73 | Existing positions closed: 13
182% more capital invested
Capital invested by funds: $80.1M → $226M (+$146M)
94% more repeat investments, than reductions
Existing positions increased: 33 | Existing positions reduced: 17
91% more funds holding
Funds holding: 66 → 126 (+60)
1.42% more ownership
Funds ownership: 13.75% → 15.17% (+1.4%)
0% more funds holding in top 10
Funds holding in top 10: 2 → 2 (0)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$15.2M |
| 2 |
Vanguard Group
Malvern,
Pennsylvania
|
+$3.22M |
| 3 |
Wells Fargo
San Francisco,
California
|
+$3.16M |
| 4 |
Geode Capital Management
Boston,
Massachusetts
|
+$2.89M |
| 5 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$2.71M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PCM
Portolan Capital Management
Boston,
Massachusetts
|
-$7.49M |
| 2 |
GS
Gagnon Securities
New York
|
-$6.81M |
| 3 |
Marshall Wace
London,
United Kingdom
|
-$6.65M |
| 4 |
GA
Gagnon Advisors
New York
|
-$5.3M |
| 5 |
SST
S Squared Technology
New York
|
-$4.57M |
PSIX Hedge Fund Activity: Q2 2025 in Review
126 of the 7,613 institutional investors tracked by Wall St. Rank reported a position in Power Solutions International (PSIX) for Q2 2025, worth a combined $226M — up 182% from $80.1M a quarter earlier.
Buyers outnumbered sellers: 73 funds opened new PSIX positions and 13 closed out — a net gain of 60 holders — while 33 added to existing stakes and 17 trimmed.
The largest buyer was BlackRock, adding an estimated $15.2M. The largest seller was Portolan Capital Management, exiting entirely with an estimated $7.49M sold.
- 126 institutional investors held Power Solutions International (PSIX) as of Q2 2025, up from 66 in Q1 2025.
- Funds reported $226M of Power Solutions International stock for Q2 2025, up 182% quarter-over-quarter.
- 73 funds opened new Power Solutions International positions in Q2 2025 and 13 closed out, a net change of +60 holders.
- The largest Power Solutions International buyer in Q2 2025 was BlackRock, an estimated $15.2M added.
- The largest Power Solutions International seller in Q2 2025 was Portolan Capital Management, an estimated $7.49M sold.
Based on aggregated 13F filings for Q2 2025.