Power Solutions International
PSIX
66 hedge funds and large institutions have $80.1M invested in Power Solutions International in 2025 Q1 according to their latest regulatory filings, with 40 funds opening new positions, 15 increasing their positions, 8 reducing their positions, and 6 closing their positions.
567% more first-time investments, than exits
New positions opened: 40 | Existing positions closed: 6
106% more funds holding
Funds holding: 32 → 66 (+34)
88% more repeat investments, than reductions
Existing positions increased: 15 | Existing positions reduced: 8
16% more capital invested
Capital invested by funds: $68.8M → $80.1M (+$11.3M)
3.7% more ownership
Funds ownership: 10.05% → 13.75% (+3.7%)
0% more funds holding in top 10
Funds holding in top 10: 2 → 2 (0)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Vanguard Group
Malvern,
Pennsylvania
|
+$9.47M |
| 2 |
Marshall Wace
London,
United Kingdom
|
+$6.61M |
| 3 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
+$3.7M |
| 4 |
BlackRock
New York
|
+$3.29M |
| 5 |
Citadel Advisors
Miami,
Florida
|
+$3.22M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
GS
Gagnon Securities
New York
|
-$11.2M |
| 2 |
GA
Gagnon Advisors
New York
|
-$5.06M |
| 3 |
SST
S Squared Technology
New York
|
-$4.48M |
| 4 |
PCM
Portolan Capital Management
Boston,
Massachusetts
|
-$1.55M |
| 5 |
SSA
Schonfeld Strategic Advisors
New York
|
-$455K |
PSIX Hedge Fund Activity: Q1 2025 in Review
66 of the 7,472 institutional investors tracked by Wall St. Rank reported a position in Power Solutions International (PSIX) for Q1 2025, worth a combined $80.1M — up 16% from $68.8M a quarter earlier.
Buyers outnumbered sellers: 40 funds opened new PSIX positions and 6 closed out — a net gain of 34 holders — while 15 added to existing stakes and 8 trimmed.
The largest buyer was Vanguard Group, opening a new position worth an estimated $9.47M. The largest seller was Gagnon Securities, cutting an estimated $11.2M.
- 66 institutional investors held Power Solutions International (PSIX) as of Q1 2025, up from 32 in Q4 2024.
- Funds reported $80.1M of Power Solutions International stock for Q1 2025, up 16% quarter-over-quarter.
- 40 funds opened new Power Solutions International positions in Q1 2025 and 6 closed out, a net change of +34 holders.
- The largest Power Solutions International buyer in Q1 2025 was Vanguard Group, an estimated $9.47M added.
- The largest Power Solutions International seller in Q1 2025 was Gagnon Securities, an estimated $11.2M sold.
Based on aggregated 13F filings for Q1 2025.