POWER SOLUTIONS INTERNATIONAL, INC. - Common Stock (PSIX) Institutional Ownership

13F Institutional Holders and Ownership History from Q1 2014 to Q4 2025

Type / Class
Equity / Common Stock
Symbol
PSIX on Nasdaq
Shares outstanding
23,099,349
Price per share
$57.14
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
5,445,615
Total reported value
$532,582,266
% of total 13F portfolios
0%
Share change
+1,961,525
Value change
+$200,130,263
Number of holders
200
Price from insider filings
$57.14
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of POWER SOLUTIONS INTERNATIONAL, INC. - Common Stock (PSIX) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Weichai America Corp. 46% -2.1% $872,937,742 -$18,954,357 10,716,152 -2.1% Weichai America Corp. 26 Aug 2025
GAGNON SECURITIES LLC 7.3% $38,496,008 1,678,849 Neil Gagnon 31 Dec 2024
Winemaster Gary S 6.3% -26% $118,545,398 -$38,726,410 1,455,259 -25% Gary S. Winemaster 18 Sep 2025
Gagnon Neil 5% $26,168,954 1,141,254 Neil Gagnon 05 Feb 2025

As of 30 Sep 2025, 200 institutional investors reported holding 5,445,615 shares of POWER SOLUTIONS INTERNATIONAL, INC. - Common Stock (PSIX). This represents 24% of the company’s total 23,099,349 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of POWER SOLUTIONS INTERNATIONAL, INC. - Common Stock (PSIX) together control 16% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
BlackRock, Inc. 2.4% 551,584 +8.8% 0% $54,176,582
VANGUARD GROUP INC 2.2% 502,381 +39% 0% $49,343,862
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 1.4% 325,085 +344% 0.02% $31,929,849
Busey Bank 0.95% 220,000 0.6% $21,608,400
Allspring Global Investments Holdings, LLC 0.89% 206,089 0.03% $19,001,406
MORGAN STANLEY 0.86% 197,540 +284% 0% $19,402,380
Portolan Capital Management, LLC 0.85% 195,804 1% $19,231,869
GEODE CAPITAL MANAGEMENT, LLC 0.73% 168,908 +9.4% 0% $16,593,413
SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.6% 138,448 +1591% 0.02% $13,598,362
STATE STREET CORP 0.59% 136,677 +75% 0% $13,424,415
Driehaus Capital Management LLC 0.58% 134,502 0.09% $13,210,786
RENAISSANCE TECHNOLOGIES LLC 0.46% 106,498 +89% 0.01% $10,460,234
Invesco Ltd. 0.43% 100,478 +2432% 0% $9,868,948
RAYMOND JAMES FINANCIAL INC 0.39% 90,639 +33% 0% $8,902,563
LPL Financial LLC 0.37% 86,142 +88% 0% $8,460,867
CITADEL ADVISORS LLC 0.36% 83,686 +12% 0.01% $8,219,639
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.3% 69,392 +46% 0% $6,815,682
Hel Ved Capital Management Ltd 0.3% 68,720 3.7% $6,749,678
NORTHERN TRUST CORP 0.28% 64,869 +36% 0% $6,371,433
GAGNON SECURITIES LLC 0.28% 64,770 -81% 1.3% $6,361,709
NAVELLIER & ASSOCIATES INC 0.28% 64,160 +47% 0.64% $6,301,795
KADENSA CAPITAL Ltd 0.26% 59,710 0.6% $5,864,716
Independent Advisor Alliance 0.24% 54,475 -0.13% 0.14% $5,350,535
O'SHAUGHNESSY ASSET MANAGEMENT, LLC 0.23% 53,804 -32% 0.03% $5,284,629
TWO SIGMA INVESTMENTS, LP 0.23% 52,769 -52% 0.01% $5,182,971

Institutional Holders of POWER SOLUTIONS INTERNATIONAL, INC. - Common Stock (PSIX) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 47,149 $2,694,229 -$21,125 $57.14 10
2025 Q3 5,445,615 $532,582,266 +$200,130,263 $98.22 200
2025 Q2 3,490,983 $226,177,204 +$49,249,210 $64.68 126
2025 Q1 3,138,009 $79,433,099 +$20,845,044 $25.28 65
2024 Q4 2,308,556 $68,725,749 +$977,679 $29.75 31
2024 Q3 2,277,246 $46,797,406 -$9,313,794 $20.55 4
2024 Q2 2,730,472 $17,379,454 +$300,180 $6.36 4
2024 Q1 2,683,311 $6,144,782 +$117,750 $2.29 4
2023 Q4 2,631,892 $5,395,378 -$29,155 $2.05 4
2023 Q3 2,646,114 $8,656,241 -$68,415 $3.27 4
2023 Q2 2,667,036 $7,467,700 -$81,077 $2.80 4
2023 Q1 2,695,992 $6,874,779 -$10,728 $2.55 4
2022 Q4 2,700,199 $8,100,597 +$207,639 $3.00 4
2022 Q3 2,630,986 $4,472,000 +$194,933 $1.70 3
2022 Q2 2,516,301 $4,369,000 +$4,278 $1.75 3
2022 Q1 2,513,856 $7,868,000 +$56,696 $3.13 3
2021 Q4 2,495,741 $7,487,000 +$21,038 $3.00 3
2021 Q3 2,488,728 $9,954,000 +$6,252 $4.00 3
2021 Q2 2,487,165 $15,171,000 +$25,260 $6.10 3
2021 Q1 2,483,024 $18,250,000 -$35,354 $7.35 3
2020 Q4 2,487,834 $8,210,000 +$202,382 $3.30 3
2020 Q3 2,426,508 $7,401,000 -$476 $3.05 3
2020 Q2 2,426,664 $9,706,000 +$1,093,119 $4.00 3
2020 Q1 2,153,370 $9,905,000 -$9,917 $4.60 3
2019 Q4 2,155,526 $17,029,000 +$1,369,613 $7.90 3
2019 Q3 1,982,150 $14,470,000 +$415,506 $7.30 3
2019 Q2 1,921,700 $18,736,000 +$706,169 $9.75 4
2019 Q1 1,849,274 $13,851,000 +$223,568 $7.49 4
2018 Q4 1,819,433 $16,829,000 +$7,556,025 $9.25 4
2018 Q3 1,002,534 $11,780,000 +$760,633 $11.75 3
2018 Q2 937,806 $9,003,000 +$600,237 $9.60 3
2018 Q1 875,279 $6,477,000 +$739,602 $7.40 3
2017 Q4 775,325 $5,815,000 -$162,559 $7.50 3
2017 Q3 796,170 $6,926,000 -$27,540 $8.69 4
2017 Q2 799,263 $7,113,000 -$20,824,087 $8.89 5
2017 Q1 2,846,954 $28,730,150 -$13,289,144 $10.09 35
2016 Q4 4,928,776 $36,975,658 -$1,930,714 $7.50 46
2016 Q3 5,123,105 $52,513,622 -$2,792,581 $10.25 51
2016 Q2 5,251,960 $93,747,568 +$2,505,288 $17.85 53
2016 Q1 5,128,698 $70,753,193 -$11,018,794 $13.80 55
2015 Q4 5,664,672 $103,379,899 -$10,757,466 $18.25 64
2015 Q3 6,008,670 $136,454,435 -$6,625,191 $22.71 74
2015 Q2 5,742,499 $310,205,111 +$13,432,670 $54.02 86
2015 Q1 5,497,142 $353,469,878 +$20,869,796 $64.29 84
2014 Q4 5,165,066 $266,566,553 -$2,771,676 $51.61 88
2014 Q3 5,068,838 $349,749,795 +$35,201,209 $69.00 90
2014 Q2 4,535,850 $325,706,887 +$40,707,416 $71.97 91
2014 Q1 4,036,034 $303,674,500 +$26,130,217 $75.17 90