# EDGAR Filing Document

**Accession Number:** 0001517040
**File Stem:** 0001493152-25-014472
**Filing Date:** 2025-9
**Character Count:** 6380
**Document Hash:** 31330d596d9b79c80ec7ec6f8fd70d5e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001493152-25-014472.hdr.sgml**: 20250922

**ACCESSION NUMBER**: 0001493152-25-014472

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250922

**DATE AS OF CHANGE**: 20250922

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** POWER SOLUTIONS INTERNATIONAL, INC.
- **CENTRAL INDEX KEY:** 0001137091
- **STANDARD INDUSTRIAL CLASSIFICATION:** ENGINES & TURBINES [3510]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 330963637
- **STATE OF INCORPORATION:** IL
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-84256
- **FILM NUMBER:** 251330371

**BUSINESS ADDRESS:**
- **STREET 1:** 201 MITTEL DRIVE
- **CITY:** WOOD DALE
- **STATE:** IL
- **ZIP:** 60191
- **BUSINESS PHONE:** 630-350-9400

**MAIL ADDRESS:**
- **STREET 1:** 201 MITTEL DRIVE
- **CITY:** WOOD DALE
- **STATE:** IL
- **ZIP:** 60191

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FORMAT INC
- **DATE OF NAME CHANGE:** 20060901

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FORMAT INC /FA/
- **DATE OF NAME CHANGE:** 20010321
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Winemaster Gary S
- **CENTRAL INDEX KEY:** 0001517040

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**MAIL ADDRESS:**
- **STREET 1:** 231 EAST COLONIAL DRIVE
- **CITY:** VERNON HILLS
- **STATE:** IL
- **ZIP:** 60061

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 22)**

**POWER SOLUTIONS INTERNATIONAL, INC.**

*(Name of Issuer)*

**Common Stock**

*(Title of Class of Securities)*

**73933G202**

*(CUSIP Number)*

**Gary S. Winemaster**<br>2140 Kingfish Road<br>Naples FL 34102<br>(630) 350-9400

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**09/18/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **73933G202** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Gary S. Winemaster** | Name of reporting person<br>**Gary S. Winemaster** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**1454578.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**681.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**1454578.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**681.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**1455259.00** | Aggregate amount beneficially owned by each reporting person<br>**1455259.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**6.3%** | Percent of class represented by amount in Row (11)<br>**6.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock

**(b) Name of Issuer:**
POWER SOLUTIONS INTERNATIONAL, INC.

**(c) Address of Issuer's Principal Executive Offices:**
201 Mittel Drive, Wood Dale, IL, 60191

**Item 5. Interest in Securities of the Issuer**

**(a)**
Item 5(a) of this Schedule 13D is hereby amended and restated in its entirety as follows:

The information contained on the cover pages is incorporated herein by reference.

The Reporting Person may be deemed to beneficially own 1,455,259 shares of Common Stock, representing 6.3% of the Common Stock outstanding based upon 23,029,846 shares of the Issuer's Common Stock outstanding as of July 31, 2025, as disclosed in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on August 8, 2025.

**(b)**
Item 5(b) of this Schedule 13D is hereby amended and restated in its entirety as follows:

Number of shares the Reporting Person has:

Sole power to vote or direct the vote: 1,454,578
Shared power to vote: 681

Sole power to dispose or direct the disposition of: 1,454,578

Shared power to dispose or direct the disposition of: 681

**(c)**
Since the most recent filing on Schedule 13D, the Reporting Person has not engaged in any transactions in the Issuer's Common Stock other than the following, each of which involved a series of open market transactions on the Nasdaq stock market:

-- On August 7, 2025, the Reporting Person sold 2,594 shares of Common Stock at a weighted average price of $91.683 per share.
-- On August 8, 2025, the Reporting Person sold 203,938 shares of Common Stock at a weighted average price of $107.7395 per share.
-- On August 11, 2025, the Reporting Person sold 12,605 shares of Common Stock at a weighted average price of $104.2741 per share.
-- On September 18, 2025, the Reporting Person sold 112,915 shares of Common Stock at a weighted average price of $105.8548 per share.
-- On September 19, 2025, the Reporting Person sold 143,352 shares of Common Stock at a weighted average price of $109.4043 per share.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Gary S. Winemaster

**Signature:** /s/ Gary S. Winemaster

**Name/Title:** Gary S. Winemaster

**Date:** 09/22/2025