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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
Jane Street
51
Jane Street
New York
$1.91M +$1.45M +16,358 +527%
Credit Agricole
52
Credit Agricole
France
$1.85M +$1.67M +18,800 New
AQR Capital Management
53
AQR Capital Management
Connecticut
$1.81M +$1.63M +18,424 New
Cambridge Investment Research Advisors
54
Cambridge Investment Research Advisors
Iowa
$1.78M +$1.25M +14,066 +345%
Two Sigma Advisers
55
Two Sigma Advisers
New York
$1.73M -$2.41M -27,200 -61%
GAM
56
Gotham Asset Management
New York
$1.64M -$140K -1,578 -9%
TC
57
TwinBeech Capital
New York
$1.6M +$1.45M +16,302 New
WI
58
Westbourne Investments
Virginia
$1.6M +$1.65M +18,660 New
Principal Financial Group
59
Principal Financial Group
Iowa
$1.59M +$1.43M +16,172 New
N
60
Nuveen
North Carolina
$1.55M +$126K +1,423 +10%
Bank of New York Mellon
61
Bank of New York Mellon
New York
$1.51M +$160K +1,804 +13%
CCFM
62
Clear Creek Financial Management
Washington
$1.45M +$174K +1,966 +15%
Russell Investments Group
63
Russell Investments Group
United Kingdom
$1.45M +$58.1K +655 +5%
WEG
64
World Equity Group
Illinois
$1.44M +$38.7K +436 +3%
VCM
65
Voleon Capital Management
California
$1.34M +$1.21M +13,608 New
Man Group
66
Man Group
United Kingdom
$1.33M +$1.2M +13,525 New
Swiss National Bank
67
Swiss National Bank
Switzerland
$1.32M +$1.19M +13,400 New
SI
68
Stephens Inc
Arkansas
$1.24M +$1.12M +12,635 New
VSI
69
Verde Servicos Internacionais
Brazil
$1.2M +$1.08M +12,172 New
Creative Planning
70
Creative Planning
Kansas
$1.06M +$17.4K +196 +2%
Barclays
71
Barclays
United Kingdom
$1.03M -$240K -2,704 -21%
PHK
72
Point72 Hong Kong
Hong Kong
$980K +$885K +9,982 New
SSA
73
Schonfeld Strategic Advisors
New York
$978K +$883K +9,954 New
GCM
74
Graham Capital Management
Connecticut
$971K +$877K +9,890 New
SSA
75
Sierra Summit Advisors
Nevada
$958K +$865K +9,752 New
1 2
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.