Security key
73933G202
POWER SOLUTIONS INTERNATIONAL, INC. - Common Stock, par value $0.001 per share (PSIX)
CUSIP: 73933G202
Q2 2025 13F Holders as of 30 Jun 2025
- Security type / class
- Equity / Common Stock, par value $0.001 per share
- Total 13F shares
- 3,490,983
- Total 13F value
- $226,177,204
- Share change
- +350,218
- SEC-reported price per share
- $64.68
- Number of holders
- 126
- Value change
- +$49,249,211
- Number of buys
- 105
- Number of sells
- 29
- Shares outstanding
- 23,115,280
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2025
Institutions
126
Top holders
10
PSIX full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2025
Previous quarter: Q1 2025
POWER SOLUTIONS INTERNATIONAL, INC. SEC filings
POWER SOLUTIONS INTERNATIONAL, INC. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 73933G202
Recent filing periods:
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
GAGNON SECURITIES LLC
Disclosed value leader
Gary S. Winemaster
Comparable rows
15/15
Latest evidence
21 Apr 2025
13D/G
13F
3/4/5
Lead comparable stake: 7.3%
13D/G row: GAGNON SECURITIES LLC
Showing 1-6 of 15 holder rows.
Quick read
GAGNON SECURITIES LLC leads the comparable SEC ownership view at 7.3%.
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 GAGNON SECURITIES LLC's linked filing trail.
Comparable ownership
Top 5
GAGNON SECURITIES LLC
7.3%
Neil Gagnon
5%
Gary S. Winemaster
9.5%
Gagnon Advisors, LLC
1.4%
Portolan Capital Management, LLC
1.3%
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 |
|---|---|---|---|---|---|
| GAGNON SECURITIES LLC |
13D/G
13F
Neil Gagnon · Company
|
7.3%
|
$44,976,365
1,678,849 shares
|
$0 | 31 Dec 2024 |
| Neil Gagnon |
13D/G
3/4/5
Former 10% Owner
|
5%
|
$30,574,195
1,141,254 shares
|
$0 | 05 Feb 2025 |
| Gary S. Winemaster |
3/4/5
former 10% owner
|
9.5%
|
$55,234,330
2,184,790 shares
|
— | 21 Apr 2025 |
| Gagnon Advisors, LLC |
13F
Company
|
1.4%
|
$8,177,676
323,484 shares
|
— | 31 Mar 2025 |
| Portolan Capital Management, LLC |
13F
Company
|
1.3%
|
$7,494,054
296,442 shares
|
— | 31 Mar 2025 |
| VANGUARD GROUP INC |
13F
Company
|
1.2%
|
$6,944,239
274,693 shares
|
— | 31 Mar 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 Q2 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
126
Shares
3,490,983
Rows available
126
| 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 Q2 2025 vs Q1 2025 Across Filers
Q1 2025 holders
65
Q2 2025 holders
126
Holder diff
61
| Investor | Q1 2025 Shares | Q2 2025 Shares | Share Diff | Share Chg % | Q1 2025 value | Q2 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend