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
$72.93
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
6,822,945
Total reported value
$391,356,393
% of total 13F portfolios
0%
Share change
+1,440,414
Value change
+$53,614,488
Number of holders
190
Price from insider filings
$72.93
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% $944,628,799 -$20,511,006 10,716,152 -2.1% Weichai America Corp. 26 Aug 2025
GAGNON SECURITIES LLC 7.3% $44,976,365 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% $30,574,195 1,141,254 Neil Gagnon 05 Feb 2025

As of 31 Dec 2025, 190 institutional investors reported holding 6,822,945 shares of POWER SOLUTIONS INTERNATIONAL, INC. - Common Stock (PSIX). This represents 30% 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 22% 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. 2.9% 673,610 +22% 0% $38,490,078
VANGUARD GROUP INC 2.3% 539,978 +7.5% 0% $30,854,344
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 1.9% 443,096 +36% 0.01% $25,318,505
Situational Awareness LP 1.9% 432,300 0.63% $24,701,622
Allspring Global Investments Holdings, LLC 1.4% 328,761 +60% 0.03% $20,228,665
Driehaus Capital Management LLC 0.99% 229,120 +70% 0.09% $13,091,917
ANTIPODES PARTNERS Ltd 0.99% 228,413 0.27% $13,052,497
Busey Bank 0.95% 220,000 0% 0.33% $12,570,800
DIMENSIONAL FUND ADVISORS LP 0.87% 201,891 +802% 0% $11,537,862
GEODE CAPITAL MANAGEMENT, LLC 0.83% 191,671 +13% 0% $10,953,889
MORGAN STANLEY 0.76% 174,754 -12% 0% $9,985,443
STATE STREET CORP 0.71% 164,895 +21% 0% $9,422,100
Qube Research & Technologies Ltd 0.49% 114,249 0.01% $6,528,188
RAYMOND JAMES FINANCIAL INC 0.47% 109,548 +21% 0% $6,259,573
Hel Ved Capital Management Ltd 0.47% 108,126 +57% 2.1% $6,178,320
RENAISSANCE TECHNOLOGIES LLC 0.47% 107,898 +1.3% 0.01% $6,165,292
Beacon Harbor Wealth Advisors, Inc. 0.45% 103,216 1.3% $5,897,762
NAVELLIER & ASSOCIATES INC 0.44% 101,729 +59% 0.65% $5,812,795
GOLDMAN SACHS GROUP INC 0.44% 101,611 +171% 0% $5,806,052
MILLENNIUM MANAGEMENT LLC 0.41% 94,658 +217% 0% $5,408,758
LPL Financial LLC 0.37% 86,581 +0.51% 0% $4,947,238
FIRST TRUST ADVISORS LP 0.35% 81,074 0% $4,632,568
NORTHERN TRUST CORP 0.34% 78,375 +21% 0% $4,478,348
VICTORY CAPITAL MANAGEMENT INC 0.33% 75,868 +56% 0% $4,335,098
WELLS FARGO & COMPANY/MN 0.33% 75,239 +111% 0% $4,299,147

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 6,822,945 $391,356,393 +$53,614,488 $57.14 190
2025 Q3 5,445,787 $532,599,160 +$200,130,267 $98.22 201
2025 Q2 3,490,983 $226,177,204 +$49,249,211 $64.68 126
2025 Q1 3,138,009 $79,433,099 +$20,845,047 $25.28 65
2024 Q4 2,308,732 $68,730,985 +$982,915 $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 +$194,935 $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 +$1,093,112 $4.00 3
2020 Q1 2,153,370 $9,905,000 -$9,917 $4.60 3
2019 Q4 2,155,526 $17,029,000 +$1,369,615 $7.90 3
2019 Q3 1,982,150 $14,470,000 +$415,503 $7.30 3
2019 Q2 1,921,700 $18,736,000 +$706,168 $9.75 4
2019 Q1 1,849,274 $13,851,000 +$223,567 $7.49 4
2018 Q4 1,819,433 $16,829,000 +$7,556,054 $9.25 4
2018 Q3 1,002,534 $11,780,000 +$760,633 $11.75 3
2018 Q2 937,806 $9,003,000 +$600,238 $9.60 3
2018 Q1 875,279 $6,477,000 +$739,601 $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 -$24,044,064 $8.89 5
2017 Q1 3,166,164 $31,950,150 -$10,085,319 $10.09 37
2016 Q4 4,929,607 $36,982,658 -$1,936,525 $7.50 51
2016 Q3 5,123,221 $52,514,622 -$2,792,561 $10.25 52
2016 Q2 5,252,076 $93,749,568 +$2,086,280 $17.85 54
2016 Q1 5,178,445 $71,439,193 -$11,041,944 $13.80 57
2015 Q4 5,664,672 $103,379,899 -$10,757,447 $18.25 64
2015 Q3 6,008,670 $136,454,435 -$6,468,579 $22.71 74
2015 Q2 5,815,289 $314,137,111 +$13,383,391 $54.02 88
2015 Q1 5,500,556 $353,689,878 +$22,956,266 $64.29 86
2014 Q4 5,165,066 $266,566,553 -$2,769,465 $51.61 88
2014 Q3 5,070,473 $349,861,795 +$33,987,154 $69.00 91
2014 Q2 4,554,342 $327,036,887 +$41,456,283 $71.97 93
2014 Q1 4,036,034 $303,674,500 +$30,707,045 $75.17 90