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PSIX

Power Solutions International
PSIX

203 hedge funds and large institutions have $533M invested in Power Solutions International in 2025 Q3 according to their latest regulatory filings, with 91 funds opening new positions, 65 increasing their positions, 32 reducing their positions, and 13 closing their positions.

New
Increased
Maintained
Reduced
Closed

600% more first-time investments, than exits

New positions opened: 91 | Existing positions closed: 13

136% more capital invested

Capital invested by funds: $226M → $533M (+$307M)

103% more repeat investments, than reductions

Existing positions increased: 65 | Existing positions reduced: 32

61% more funds holding

Funds holding: 126 → 203 (+77)

10% more call options, than puts

Call options by funds: $21.3M | Put options by funds: $19.3M

8.5% more ownership

Funds ownership: 15.17% → 23.67% (+8.5%)

0% more funds holding in top 10

Funds holding in top 10: 2 → 2 (0)

Holders
203
Holders Change
+77
Holders Change %
+61.11%
% of All Funds
2.66%
Holding in Top 10
2
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.03%
New
91
Increased
65
Reduced
32
Closed
13
Calls
$21.3M
Puts
$19.3M
Net Calls
+$1.99M
Net Calls Change
+$1.99M

Top Buyers

Rank Fund Capital Flow
1
Arrowstreet Capital
Arrowstreet Capital
Massachusetts
+$22.3M
2
BB
Busey Bank
Illinois
+$19.5M
3
Allspring Global Investments
Allspring Global Investments
North Carolina
+$18.3M
4
PCM
Portolan Capital Management
Massachusetts
+$17.4M
5
Morgan Stanley
Morgan Stanley
New York
+$13M

Top Sellers

Rank Fund Capital Flow
1
GS
Gagnon Securities
New York
-$24.5M
2
GA
Gagnon Advisors
New York
-$11.7M
3
Wells Fargo
Wells Fargo
California
-$6.2M
4
Two Sigma Investments
Two Sigma Investments
New York
-$5.08M
5
SST
S Squared Technology
New York
-$2.56M
Name Holding Trade Value Shares
Change 		Change in
Stake
EI
26
EAM Investors
California
$5M +$467K +5,268 +11%
Point72 Asset Management
27
Point72 Asset Management
Connecticut
$4.78M +$4.31M +48,624 New
Victory Capital Management
28
Victory Capital Management
Texas
$4.77M +$4.31M +48,572 New
Lazard Asset Management
29
Lazard Asset Management
New York
$4.66M +$138K +1,559 +3%
MCS
30
Mercuria Capital Strategies
Texas
$4.57M +$4.12M +46,490 New
SEI Investments
31
SEI Investments
Pennsylvania
$4.22M +$3.33M +37,537 +696%
Acadian Asset Management
32
Acadian Asset Management
Massachusetts
$4.04M +$2.75M +30,970 +303%
Osaic Holdings
33
Osaic Holdings
Arizona
$3.85M +$79.5K +897 +2%
CSS
34
Cubist Systematic Strategies
Connecticut
$3.83M +$3.46M +39,035 New
VCM
35
Valiant Capital Management
California
$3.82M -$1.91M -21,579 -36%
Goldman Sachs
36
Goldman Sachs
New York
$3.68M -$2.19M -24,679 -40%
Cetera Investment Advisers
37
Cetera Investment Advisers
Illinois
$3.59M +$1.29M +14,591 +66%
Wells Fargo
38
Wells Fargo
California
$3.5M -$6.2M -69,908 -66%
Ameriprise
39
Ameriprise
Minnesota
$3.44M +$3.1M +35,008 New
MML Investors Services
40
MML Investors Services
Massachusetts
$3.37M +$376K +4,246 +14%
Franklin Resources
41
Franklin Resources
California
$3.36M +$3.03M +34,210 New
CCM
42
Corsair Capital Management
New York
$3.01M +$443K +5,000 +20%
Millennium Management
43
Millennium Management
New York
$2.93M -$974K -10,984 -27%
RWM
44
Ritholtz Wealth Management
New York
$2.86M -$1.04M -11,736 -29%
BC
45
Burney Company
Virginia
$2.67M -$1.06M -11,911 -30%
TFS
46
Thoroughbred Financial Services
Tennessee
$2.4M +$56.4K +636 +3%
Dimensional Fund Advisors
47
Dimensional Fund Advisors
Texas
$2.2M +$1.13M +12,732 +132%
Verition Fund Management
48
Verition Fund Management
Connecticut
$2.11M +$280K +3,154 +17%
DLP
49
De Lisle Partners
United Kingdom
$2.06M +$1.86M +21,000 New
AllianceBernstein
50
AllianceBernstein
Tennessee
$1.92M +$1.33M +15,040 +334%
1
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3 4 5

PSIX Hedge Fund Activity: Q3 2025 in Review

203 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in Power Solutions International (PSIX) for Q3 2025, worth a combined $533M — up 136% from $226M a quarter earlier.

Buyers outnumbered sellers: 91 funds opened new PSIX positions and 13 closed out — a net gain of 78 holders — while 65 added to existing stakes and 32 trimmed.

The largest buyer was Arrowstreet Capital, adding an estimated $22.3M. The largest seller was Gagnon Securities, cutting an estimated $24.5M.

  • 203 institutional investors held Power Solutions International (PSIX) as of Q3 2025, up from 126 in Q2 2025.
  • Funds reported $533M of Power Solutions International stock for Q3 2025, up 136% quarter-over-quarter.
  • 91 funds opened new Power Solutions International positions in Q3 2025 and 13 closed out, a net change of +78 holders.
  • The largest Power Solutions International buyer in Q3 2025 was Arrowstreet Capital, an estimated $22.3M added.
  • The largest Power Solutions International seller in Q3 2025 was Gagnon Securities, an estimated $24.5M sold.

Based on aggregated 13F filings for Q3 2025.