Security key
73933G202
POWER SOLUTIONS INTERNATIONAL, INC. - Common Stock, par value $0.001 per share (PSIX)
CUSIP: 73933G202
Q3 2025 13F Holders as of 30 Sep 2025
- Security type / class
- Equity / Common Stock, par value $0.001 per share
- Total 13F shares
- 5,445,787
- Total 13F value
- $532,599,160
- Share change
- +1,961,525
- Put/Call ratio
- 88%
- SEC-reported price per share
- $98.22
- Number of holders
- 201
- Value change
- +$200,130,267
- Number of buys
- 154
- Number of sells
- 44
- Shares outstanding
- 23,033,154
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2025
Institutions
201
Top holders
10
PSIX full security history
Ownership snapshot
Full 13F holder table
POWER SOLUTIONS INTERNATIONAL, INC. SEC filings
POWER SOLUTIONS INTERNATIONAL, INC. company facts
Broader feeds
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
18 Sep 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%
BlackRock, Inc.
2.2%
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
|
46%
from 13D/G
|
$999,855,126
10,599,759 shares
|
-$10,839,905 | 11 Sep 2025 |
| GAGNON SECURITIES LLC |
13D/G
13F
Neil Gagnon · Company
|
7.3%
|
$44,976,365
1,678,849 shares
|
$0 | 31 Dec 2024 |
| Gary S. Winemaster |
13D/G
3/4/5
former 10% owner
|
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
|
5%
|
$30,574,195
1,141,254 shares
|
$0 | 05 Feb 2025 |
| BlackRock, Inc. |
13F
Company
|
2.2%
|
$32,790,627
506,967 shares
|
— | 30 Jun 2025 |
| VANGUARD GROUP INC |
13F
Company
|
1.6%
|
$23,390,746
361,638 shares
|
— | 30 Jun 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 Q3 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
201
Shares
5,445,787
Rows available
201
| 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 Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
126
Q3 2025 holders
201
Holder diff
75
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 value | Q3 2025 value | Value change | Value Chg % |
|---|