POWER SOLUTIONS INTERNATIONAL, INC. - Common Stock, par value $0.001 per share (PSIX)

Q: What does CUSIP 73933G202 represent in this 13F holders report?

CUSIP 73933G202 is the security identifier for PSIX - POWER SOLUTIONS INTERNATIONAL, INC. - Common Stock, par value $0.001 per share used to aggregate holder disclosures.

Q: How many institutions held PSIX - POWER SOLUTIONS INTERNATIONAL, INC. - Common Stock, par value $0.001 per share in Q4 2025?

193 institutional investors reported PSIX - POWER SOLUTIONS INTERNATIONAL, INC. - Common Stock, par value $0.001 per share for Q4 2025. Use the holders table for investor-level position and value details.

CUSIP: 73933G202

Q4 2025 13F Holders as of 31 Dec 2025

Security type / class: Equity / Common Stock, par value $0.001 per share
Total 13F shares: 6,842,241
Total 13F value: $392,459,430
Share change: +1,445,615
Put/Call ratio: 89%
SEC-reported price per share: $57.14
Number of holders: 193
Value change: +$53,698,472
Number of buys: 144
Number of sells: 89
Shares outstanding: 23,115,280

Security key

73933G202

Report period

Q4 2025

Institutions

193

Top holders

PSIX full security history Ownership snapshot Full 13F holder table Newer quarter: Q2 2026 POWER SOLUTIONS INTERNATIONAL, INC. SEC filings POWER SOLUTIONS INTERNATIONAL, INC. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 73933G202

Newer quarter: Q2 2026

Recent filing periods:

Q2 2026

Ownership snapshot

Top reported holders of PSIX - POWER SOLUTIONS INTERNATIONAL, INC. - Common Stock, par value $0.001 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Weichai America Corp.

Disclosed value leader

Weichai America Corp.

Comparable rows

15/15

Latest evidence

11 Dec 2025

3/4/5 13D/G 13F Lead comparable stake: 46% 13D/G row: Weichai America Corp. Showing 1-6 of 15 holder rows.

Quick read

Weichai America Corp. leads the comparable SEC ownership view at 46%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Weichai America Corp.'s linked filing trail.

Comparable ownership Top 5

Weichai America Corp. 46%

GAGNON SECURITIES LLC 7.3%

Gary S. Winemaster 6.3%

Neil Gagnon 5%

Frank P. Simpkins 0.13%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Weichai America Corp.	3/4/5 13D/G 10%+ Owner 3/4/5 13D/G	46% from 13D/G	$999,855,126 10,599,759 shares	-$100,288,138	11 Sep 2025
GAGNON SECURITIES LLC	13D/G 13F Neil Gagnon · Company 13D/G 13F	7.3%	$44,976,365 1,678,849 shares	$0	31 Dec 2024
Gary S. Winemaster	13D/G 3/4/5 former 10% owner 13D/G 3/4/5	6.3%	$118,545,398 1,455,259 shares	-$38,726,410	18 Sep 2025
Neil Gagnon	13D/G 3/4/5 Former 10% Owner 13D/G 3/4/5	5%	$30,574,195 1,141,254 shares	$0	05 Feb 2025
Frank P. Simpkins	3/4/5 Director 3/4/5	0.13%	$1,938,900 30,000 shares	-$1,390,904	11 Dec 2025
Hong He	3/4/5 Director 3/4/5	0.1%	$1,534,962 23,750 shares	-$915,840	11 Dec 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q4 2025

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

193

6,842,241

Rows available

193

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q4 2025 vs Q3 2025 Across Filers

Q3 2025 holders

201

Q4 2025 holders

193

Holder diff

-8

Investor	Q3 2025 Shares	Q4 2025 Shares	Share Diff	Share Chg %	Q3 2025 value	Q4 2025 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend