Power Solutions International, Inc. (PSIX) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

23,061,000Shares Outstanding

6,945,068Shares held by institutions

$525,047,141Value of institutional holdings

30.12%Institutional ownership %

48.14%Shares Changed QoQ

191No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Power Solutions International, Inc. (NASDAQ:PSIX) appears in 191 institutional 13F filings for the quarter ending December 2025.

These investors held 29.7% of outstanding shares in December 2025, up from 23.7% in September 2025.
They increased total shares held in Power Solutions International by 46.26% from the prior quarter, while the number of investors in PSIX increased 478.79% year over year.
Of these 191 funds, 142 grew their exposure to Power Solutions International, 32 cut back, and 17 maintained positions.
Combined, these investors held 6.84Mn shares in PSIX for December 2025, up by 2.16Mn shares quarter on quarter, and up 4.52Mn shares year over year.
As of December 31, 2025, the biggest holder of Power Solutions International is BlackRock, Inc. at 673.61K shares, representing 2.92% of shares outstanding.
The most significant purchases of PSIX for the quarter ending December 2025 came from Situational Awareness LP (432.3K), ANTIPODES PARTNERS Ltd (228.41K), DIMENSIONAL FUND ADVISORS LP (179.51K), Goldman Sachs Group Inc (165.77K), Allspring Global Investments Holdings, LLC (122.67K).
Top sellers of PSIX stock for the quarter ending December 2025 included SUSQUEHANNA INTERNATIONAL GROUP, LLP (118.79K), Invesco Ltd. (92.7K), CITADEL ADVISORS LLC (67.35K), LAZARD ASSET MANAGEMENT LLC (34.86K), O'SHAUGHNESSY ASSET MANAGEMENT, LLC (23.58K).
Per Business Quant data, the top 10 holders of Power Solutions International for the quarter ending December 2025 are BlackRock, Inc. (673.61K), VANGUARD GROUP INC (539.98K), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (443.1K), Situational Awareness LP (432.3K), Allspring Global Investments Holdings, LLC (328.76K), DRIEHAUS CAPITAL MANAGEMENT LLC (229.12K), ANTIPODES PARTNERS Ltd (228.41K), Busey Bank (220.0K), Goldman Sachs Group Inc (203.22K), DIMENSIONAL FUND ADVISORS LP (201.89K).

191 Institutional Holders

6,945,068 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	673,610	122,026	22.12%	$38,490,078.00
VANGUARD GROUP INC	31 Dec, 2025	539,978	37,597	7.48%	$30,854,344.00
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	31 Dec, 2025	443,096	118,011	36.30%	$25,318,505.00
Situational Awareness LP	31 Dec, 2025	432,300	432,300	0.00%	$24,701,622.00
Allspring Global Investments Holdings, LLC	31 Dec, 2025	328,761	122,672	59.52%	$20,228,665.00
DRIEHAUS CAPITAL MANAGEMENT LLC	31 Dec, 2025	229,120	94,618	70.35%	$13,091,917.00
ANTIPODES PARTNERS Ltd	31 Dec, 2025	228,413	228,413	0.00%	$13,052,497.00
Busey Bank	31 Dec, 2025	220,000	0	0.00%	$12,570,800.00
Goldman Sachs Group Inc	31 Dec, 2025	203,222	165,770	442.62%	$11,612,104.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	201,891	179,511	802.10%	$11,537,862.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	191,671	22,763	13.48%	$10,953,889.00
Morgan Stanley	31 Dec, 2025	174,754	-22,786	-11.53%	$9,985,443.00
State Street Corp	31 Dec, 2025	164,895	28,218	20.65%	$9,422,100.00
Qube Research & Technologies Ltd	31 Dec, 2025	114,249	114,249	0.00%	$6,528,188.00
Raymond James Financial Inc	31 Dec, 2025	109,548	18,909	20.86%	$6,259,573.00
Hel Ved Capital Management Ltd	31 Dec, 2025	108,126	39,406	57.34%	$6,178,320.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	107,898	1,400	1.31%	$6,165,292.00
Beacon Harbor Wealth Advisors, Inc.	31 Dec, 2025	103,216	103,216	0.00%	$5,897,762.00
NAVELLIER & ASSOCIATES INC	31 Dec, 2025	101,729	37,569	58.56%	$5,812,795.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	94,658	64,779	216.80%	$5,408,758.00

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