Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

POWER SOLUTIONS INTERNATIONAL, INC.

CIK 0001137091PSIX· quarter ending 2026-06-30
Shares outstanding
23,065,450
Held by 13F filers
8,394,698
36.4% of shares outstanding
Holders
157
-47 vs 2026-03-31 · 24 new, 71 exited
Value
$328.5M
shares +15.2% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-06, as of 2026-07-30)

ClassListedShares outstandingHeld by 13F filers% of classHoldersCUSIP
Common stockPSIX · NASDAQ23,065,4508,394,69836.4%15773933G202

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine
CountCUSIPClass (as filers write it)HoldersShares heldClass shares% of classValueOptionsMapped via
73933G202Stock1578,394,69823,065,45036.4%$328.5M3 call / 3 put13DGholders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (157 of 157 · 73933G202)

change vs 2026-03-31
#FilerShares% of classValueChange
1Point72 Asset Management, L.P.1,497,1556.49%$58.2M+1,491,805 (+27884.2%)
2BlackRock, Inc.818,9683.55%$31.8M+103,412 (+14.5%)
3Newtyn Management, LLC600,8902.61%$23.4MNEW
4VANGUARD CAPITAL MANAGEMENT LLC340,6341.48%$13.2M-340 (-0.1%)
5Yunqi Capital Ltd339,0001.47%$13.2MNEW
6BARCLAYS PLC311,1101.35%$12.1M+72,064 (+30.1%)
7DIMENSIONAL FUND ADVISORS LP296,8121.29%$11.5M+13,571 (+4.8%)
8OLP CAPITAL MANAGEMENT Ltd283,9401.23%$11.0MNEW
9Busey Bank220,0000.95%$8.6M—
10GEODE CAPITAL MANAGEMENT, LLC216,2350.94%$8.4M+19,938 (+10.2%)
11MILLENNIUM MANAGEMENT LLC206,9420.90%$8.0M+109,062 (+111.4%)
12SG Americas Securities, LLC194,9300.85%$7.6M-21,465 (-9.9%)
13STATE STREET CORP184,8550.80%$7.2M+14,108 (+8.3%)
14GOLDMAN SACHS GROUP INC147,3330.64%$5.7M+103,027 (+232.5%)
15FIRST TRUST ADVISORS LP146,7500.64%$5.7M+60,627 (+70.4%)
16Yiheng Capital Management, L.P.133,5000.58%$5.2MNEW
17Meros Investment Management, LP129,2660.56%$5.0M+90,000 (+229.2%)
18MORGAN STANLEY113,0030.49%$4.4M-54,034 (-32.3%)
19TWO SIGMA INVESTMENTS, LP108,9610.47%$4.2M+62,590 (+135.0%)
20Hel Ved Capital Management Ltd100,8760.44%$3.9M—
21ALLIANCEBERNSTEIN L.P.98,7000.43%$6.0M+65,260 (+195.2%)
22Valiant Capital Management, L.P.81,6740.35%$3.2M+12,286 (+17.7%)
23NORTHERN TRUST CORP74,7960.32%$2.9M-5,303 (-6.6%)
24Defiance ETFs, LLC72,8810.32%$2.7M+52,013 (+249.2%)
25Tidal Investments LLC72,4470.31%$2.8M+43,068 (+146.6%)
26VANGUARD PORTFOLIO MANAGEMENT LLC70,1500.30%$2.7M-35,079 (-33.3%)
27CHARLES SCHWAB INVESTMENT MANAGEMENT INC68,5910.30%$2.7M-6,162 (-8.2%)
28CAPITAL FUND MANAGEMENT S.A.63,0680.27%$2.5M+15,755 (+33.3%)
29LPL Financial LLC57,7060.25%$2.2M-98,479 (-63.1%)
30CITIGROUP INC53,9890.23%$2.1M+52,460 (+3431.0%)
31OnyxPoint Global Management LP53,4580.23%$2.1M-24,461 (-31.4%)
32CITADEL ADVISORS LLC52,0170.23%$2.0M+24,058 (+86.0%)
33VANGUARD FIDUCIARY TRUST CO50,9860.22%$2.0M+2,296 (+4.7%)
34VICTORY CAPITAL MANAGEMENT INC45,7610.20%$1.8M+8,445 (+22.6%)
35SUSQUEHANNA INTERNATIONAL GROUP, LLP45,7070.20%$1.8M+37,220 (+438.6%)
36Bridge City Capital, LLC40,6580.18%$1.6M+7,865 (+24.0%)
37VOLORIDGE INVESTMENT MANAGEMENT, LLC37,6370.16%$1.5M-34,993 (-48.2%)
38ExodusPoint Capital Management, LP37,0200.16%$1.4MNEW
39Bank of New York Mellon Corp35,2900.15%$1.4M+620 (+1.8%)
40Man Group plc34,7880.15%$1.4M-53,879 (-60.8%)
41RAYMOND JAMES FINANCIAL INC30,4790.13%$1.2M-2,385 (-7.3%)
42AQR CAPITAL MANAGEMENT LLC29,6580.13%$1.2M+1,530 (+5.4%)
43WELLS FARGO & COMPANY/MN29,6440.13%$1.2M-14,208 (-32.4%)
44XTX Topco Ltd27,4790.12%$1.1M+15,916 (+137.6%)
45Capstone Capital Management Ltd26,7180.12%$1.0MNEW
46Balyasny Asset Management L.P.26,2010.11%$1.0M+17,802 (+212.0%)
47Qube Research & Technologies Ltd25,8450.11%$1.0M+13,307 (+106.1%)
48Cetera Investment Advisers25,6270.11%$997K-7,881 (-23.5%)
49Kerrisdale Advisers, LLC25,1750.11%$979K+13,510 (+115.8%)
50Persistent Asset Partners Ltd21,8640.09%$850K+17,569 (+409.1%)
51Hennion & Walsh Asset Management, Inc.21,5460.09%$838K+5,396 (+33.4%)
52De Lisle Partners LLP21,0000.09%$817K—
53WORLD EQUITY GROUP, INC.20,6810.09%$804K+2,873 (+16.1%)
54Freestone Grove Partners LP20,2860.09%$789KNEW
55Nuveen, LLC20,0710.09%$781K+3,401 (+20.4%)
56Brevan Howard Capital Management LP19,6080.09%$763KNEW
57Belpointe Asset Management LLC18,7950.08%$731KNEW
58FRANKLIN RESOURCES INC17,8350.08%$694K-21,309 (-54.4%)
59BANK OF AMERICA CORP /DE/17,7620.08%$691K-13,733 (-43.6%)
60Swiss National Bank17,3000.08%$673K-900 (-4.9%)
61ARGA Investment Management, LP16,2380.07%$631K—
62NEW YORK STATE COMMON RETIREMENT FUND16,1260.07%$627K+2,592 (+19.2%)
63Gotham Asset Management, LLC15,0720.07%$586K-845 (-5.3%)
64UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC13,7440.06%$535K—
65THOROUGHBRED FINANCIAL SERVICES, LLC13,5880.06%$528K-10,466 (-43.5%)
66O'SHAUGHNESSY ASSET MANAGEMENT, LLC11,8650.05%$461K-6,468 (-35.3%)
67LAZARD ASSET MANAGEMENT LLC10,5340.05%$410KNEW
68RHUMBLINE ADVISERS10,3280.04%$402K+459 (+4.7%)
69NAVELLIER & ASSOCIATES INC10,2240.04%$398K-97,278 (-90.5%)
70MASSACHUSETTS FINANCIAL SERVICES CO /MA/9,7600.04%$380K-392 (-3.9%)
71CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM9,7440.04%$379K+1,005 (+11.5%)
72CREDIT AGRICOLE S A9,5000.04%$369K—
73Creative Planning9,2090.04%$358K+1,458 (+18.8%)
74Bay Rivers Group9,1410.04%$355K-45 (-0.5%)
75ALPS ADVISORS INC8,8400.04%$344K+116 (+1.3%)
76DEUTSCHE BANK AG\8,6960.04%$338K+1,883 (+27.6%)
77FOX RUN MANAGEMENT, L.L.C.8,4490.04%$329KNEW
78HORIZON KINETICS ASSET MANAGEMENT LLC8,3000.04%$323K+3,300 (+66.0%)
79State of Alaska, Department of Revenue8,1540.04%$317K+2,500 (+44.2%)
80Allspring Global Investments Holdings, LLC7,7820.03%$303K-293,386 (-97.4%)
81RITHOLTZ WEALTH MANAGEMENT7,5320.03%$293K-3,079 (-29.0%)
82PRICE T ROWE ASSOCIATES INC /MD/7,1050.03%$277K+1,178 (+19.9%)
83Legal & General Group Plc6,9450.03%$270K+1,442 (+26.2%)
84EXCHANGE TRADED CONCEPTS, LLC6,8120.03%$265KNEW
85Vestcor Inc6,7410.03%$262K—
86CORSAIR CAPITAL MANAGEMENT, L.P.6,6390.03%$258K—
87Legato Capital Management LLC6,5740.03%$256K+1,377 (+26.5%)
88BNP PARIBAS FINANCIAL MARKETS6,5500.03%$255K-6,611 (-50.2%)
89JPMORGAN CHASE & CO6,1070.03%$237K+45 (+0.7%)
90MML INVESTORS SERVICES, LLC6,0870.03%$237K-5,284 (-46.5%)
91D.A. DAVIDSON & CO.6,0510.03%$235K+757 (+14.3%)
92Sequent Planning LLC5,9730.03%$232K-450 (-7.0%)
93ROYAL BANK OF CANADA5,8350.03%$227K+410 (+7.6%)
94Invesco Ltd.5,6390.02%$219K-2,754 (-32.8%)
95VANGUARD ASSET MANAGEMENT, Ltd5,6190.02%$219K—
96AlphaGrep UK Ltd5,5950.02%$218K+1,991 (+55.2%)
97Quantinno Capital Management LP5,4810.02%$213KNEW
98Inspire Advisors, LLC5,3800.02%$209K+1,338 (+33.1%)
99Truvestments Capital LLC5,3470.02%$208K+1,333 (+33.2%)
100OSAIC HOLDINGS, INC.5,2210.02%$203K-8,152 (-61.0%)
101INDEPENDENT FINANCIAL GROUP, LLC5,1630.02%$201K-3,610 (-41.1%)
102Triumph Capital Management4,9240.02%$191K+1,219 (+32.9%)
103MetLife Investment Management, LLC4,7660.02%$185K—
104MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.3,9850.02%$155K-137 (-3.3%)
105SIMPLEX TRADING, LLC3,1700.01%$123KNEW
106Spire Wealth Management2,9460.01%$115K+700 (+31.2%)
107Russell Investments Group, Ltd.2,7350.01%$106K-12,779 (-82.4%)
108Vanguard Global Advisers, LLC2,5350.01%$99K-1,391 (-35.4%)
109Vanguard Investments Australia, Ltd.2,4620.01%$96K—
110M&G PLC2,4260.01%$95K+172 (+7.6%)
111Police & Firemen's Retirement System of New Jersey2,3030.01%$90K—
112State of Wyoming2,2650.01%$88KNEW
113KLP KAPITALFORVALTNING AS1,9000.01%$74K—
114GROUP ONE TRADING LLC1,5310.01%$60K-1,820 (-54.3%)
115Rockefeller Capital Management L.P.1,1890.01%$46K+29 (+2.5%)
116FEDERATED HERMES, INC.1,0520.00%$41K-25,797 (-96.1%)
117Indiana Trust & Investment Management Co1,0000.00%$39K—
118MEEDER ASSET MANAGEMENT INC9840.00%$38K-361 (-26.8%)
119Tower Research Capital LLC (TRC)8950.00%$35K+178 (+24.8%)
120Steward Partners Investment Advisory, LLC8500.00%$33KNEW
121Ameritas Investment Partners, Inc.6950.00%$27K—
122JONES FINANCIAL COMPANIES LLLP6550.00%$25K+149 (+29.4%)
123FMR LLC5910.00%$23K-1,969 (-76.9%)
124CREATIVE FINANCIAL DESIGNS INC /ADV5850.00%$23K-1,900 (-76.5%)
125Silver Grove Financial Group, Inc.4010.00%$16K+101 (+33.7%)
126Founders Capital Management3000.00%$12KNEW
127SUMMIT SECURITIES GROUP LLC2600.00%$10KNEW
128PNC Financial Services Group, Inc.2050.00%$8K—
129Larson Financial Group LLC1850.00%$7KNEW
130IFP Advisors, Inc1720.00%$7K-9 (-5.0%)
131NewEdge Advisors, LLC1500.00%$6K-55 (-26.8%)
132Strive Financial Group ,LLC1260.00%$5K-274 (-68.5%)
133FIDUCIARY FINANCIAL ADVISORS950.00%$4KNEW
134Bullock Wealth Management Group910.00%$3K—
135HARBOR CAPITAL ADVISORS, INC.890.00%$3K-12 (-11.9%)
136Stone House Investment Management, LLC690.00%$3K+4 (+6.2%)
137Geneos Wealth Management Inc.640.00%$2K—
138TD Waterhouse Canada Inc.550.00%$2K-60 (-52.2%)
139Sterling Capital Management LLC520.00%$2K-20 (-27.8%)
140Blue Trust, Inc.300.00%$1K+16 (+114.3%)
141Ameritas Advisory Services, LLC270.00%$1KNEW
142GAMMA Investing LLC240.00%$933+7 (+41.2%)
143ASSETMARK, INC200.00%$778—
144Hughes Financial Services, LLC180.00%$700-756 (-97.7%)
145Allworth Financial LP160.00%$623-6 (-27.3%)
146SJS Investment Consulting Inc.140.00%$545NEW
147Parallel Advisors, LLC120.00%$467+3 (+33.3%)
148MassMutual Private Wealth & Trust, FSB80.00%$311+7 (+700.0%)
149Covestor Ltd60.00%$0+5 (+500.0%)
150US BANCORP \DE\50.00%$194-47 (-90.4%)
151Clearstead Advisors, LLC40.00%$156—
152Pinpoint Asset Management (Singapore) Pte. Ltd.20.00%$78—
153Arax Advisory Partners20.00%$78NEW
154Farther Finance Advisors, LLC10.00%$39-4,006 (-100.0%)
155EverSource Wealth Advisors, LLC10.00%$39—
156HUNTINGTON NATIONAL BANK10.00%$39—
157ROTHSCHILD INVESTMENT LLC10.00%$39NEW
Exited since 2026-03-31 (71 filers; largest 25 shown)
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP−466,204
Situational Awareness Partners LP−432,300
Situational Awareness LP−432,300
DANSKE BANK A/S−121,653
HUSSMAN STRATEGIC ADVISORS, INC.−63,000
CVFG LLC−60,170
SEI INVESTMENTS CO−57,455
ANTIPODES PARTNERS Ltd−52,877
Cambridge Investment Research Advisors, Inc.−44,270
JANE STREET GROUP, LLC−32,796
BURNEY CO/−29,020
AMERIPRISE FINANCIAL INC−26,984
OP Asset Management Ltd−25,440
Polymer Capital Management (HK) LTD−16,000
Moran Wealth Management, LLC−15,927
Clear Creek Financial Management, LLC−15,681
Capelight Capital Asset Management LP−15,000
ALGERT GLOBAL LLC−14,510
Squarepoint Ops LLC−13,586
OAK RIDGE INVESTMENTS LLC−13,307
STEPHENS INC /AR/−12,000
Kassira Wealth Management LLC−9,549
COMMONWEALTH EQUITY SERVICES, LLC−9,399
Maxi Investments CY Ltd−8,654
GREAT VALLEY ADVISOR GROUP, INC.−7,445

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting personFormFiledEventShares% of class
Point72 Asset Management, L.P.SCHEDULE 13G/A2026-08-142026-06-301,497,1556.5%
Point72 Capital Advisors, Inc.SCHEDULE 13G/A2026-08-142026-06-301,497,1556.5%
Steven A. CohenSCHEDULE 13G/A2026-08-142026-06-301,497,1556.5%
Gary S. WinemasterSCHEDULE 13D/A2025-09-222025-09-181,455,2596.3%
Shandong Heavy Industry Group Co., Ltd.SCHEDULE 13D/A2025-08-282025-08-2610,716,15246.5%
Weichai America Corp.SCHEDULE 13D/A2025-08-282025-08-2610,716,15246.5%
Weichai Power Co., Ltd.SCHEDULE 13D/A2025-08-282025-08-2610,716,15246.5%
Gagnon Advisors, LLCSCHEDULE 13G/A2025-02-142025-02-05335,4571.5%
Gagnon Securities LLCSCHEDULE 13G/A2025-02-142025-02-05575,8202.5%
Neil GagnonSCHEDULE 13G/A2025-02-142025-02-051,141,2545%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.