POWER SOLUTIONS INTERNATIONAL, INC. SEC Filings

Gary S. Winemaster amended his Schedule 13D for Power Solutions International, Inc. (PSIX) to report beneficial ownership of 1,455,259 shares, representing 6.3% of the outstanding common stock based on 23,029,846 shares outstanding as of July 31, 2025. The amendment restates voting and dispositive power: sole voting and dispositive power over 1,454,578 shares and shared power over 681 shares. The filing lists a series of open-market sales since the prior filing: 2,594, 203,938, 12,605, 112,915, and 143,352 shares on August 7, August 8, August 11, September 18, and September 19, 2025, respectively, totaling 475,404 shares sold. The statement contains no disclosure of legal proceedings and identifies source of funds as "OO."

Power Solutions International disclosed the hiring of Zhaoying (Dorothy) Du as an executive under an employment agreement effective September 3, 2025. The agreement provides a base structure including a $30,000 sign-on bonus, participation in a Key Performance Indicator plan at 50% of base salary, a Long Term Incentive target at 60% of base salary, and an award of 700 Stock Appreciation Rights vesting in three equal annual installments. Ms. Du is eligible for executive-level equity programs and an $800 monthly vehicle allowance. If terminated without Cause, she is entitled to severance equal to nine months' base pay (or one year if employed 48 months or longer) plus unpaid KPI and LTI awards. The agreement contains one-year post-termination non-compete and non-solicit restrictions.

Power Solutions International insiders reported coordinated sales of 79,839 shares on 09/11/2025, reducing their indirect stake to 10,599,759 shares. The Form 4 is filed jointly by Weichai America Corp., Weichai Power Co., Ltd. and Shandong Heavy Industry Group Co., Ltd., each identified as a director and 10% owner. The sales were executed pursuant to broker-dealer transactions under Rule 144 and were reported as multiple trades at weighted average prices across four ranges from about $91.36 to $94.98 per share. The report clarifies that Weichai America Corp. is the direct owner and the Reporting Persons share voting and dispositive power over the reported shares.

The filing is a Form 144 notice for Power Solutions International, Inc. (PSIX) reporting a proposed sale of 1,500 common shares through Morgan Stanley Smith Barney LLC. The shares were acquired on 07/10/2024 upon restricted stock vesting under a registered plan and were paid as compensation. The filer lists an approximate sale date of 09/11/2025 and an aggregate market value at the time of notice of $141,000.00. The issuer's total shares outstanding is reported as 23,029,846. The filer certifies they are not aware of any undisclosed material adverse information.

Power Solutions International insider sale: CEO Constantine Xykis reported a sale of 7,854 shares of Power Solutions International (PSIX) on 09/09/2025. The filing shows the shares were sold at an average price of $91.313, with individual trades in a range from $91.10 to $91.84, implying aggregate proceeds of roughly $717,000. After the reported disposition, the filing lists 0 shares as beneficially owned following the transaction. The Form 4 is signed and dated 09/11/2025, and includes a footnote disclosing the per-trade price range and an offer to provide detailed per-trade quantities on request.

Power Solutions International, Inc. director He Hong reported selling a total of 4,000 shares of common stock on September 9, 2025, in two open-market or private transactions: 1,500 shares at $90.00 and 2,500 shares at $92.31 per share. A footnote notes that a reported price reflects an average across trades between $92.00 and $92.55. Following these sales, He Hong directly holds 21,250 common shares.

Power Solutions International (PSIX) Form 144 notice discloses a proposed sale of 1,000 common shares through Morgan Stanley Smith Barney on 09/10/2025 with an aggregate market value of $95,000 and 23,029,846 shares outstanding. The 1,000 shares were acquired on 07/10/2024 as restricted stock that vested under a registered plan and were paid as compensation. The filing also lists recent sales by the same person, HONG HE: 4,000 shares on 09/09/2025 (gross proceeds $365,773.85), 1,000 on 09/08/2025 ($89,000), and 2,500 on 08/13/2025 ($225,065.75). The signer represents no undisclosed material adverse information.

He Hong, a director of Power Solutions International, Inc. (PSIX), reported an insider sale on Form 4. On 09/08/2025 He Hong sold 1,000 shares of the company's common stock at $89 per share and, after the transaction, beneficially owned 25,250 shares. The Form 4 was signed and filed with a datestamp of 09/10/2025. The filing identifies the reporting person as a director and indicates the report was filed by one reporting person.

Form 144 notice for proposed sale of securities. The filer reported an intended sale of 7,854 shares of Common Stock on 09/09/2025 through Wells Fargo Advisors with an aggregate market value of $662,799. The filing shows 23,029,846 shares outstanding. The securities to be sold were acquired on 10/01/2024 as a compensatory grant and recorded as 8,520 shares delivered on the same date via exercise of SARs. The filing also discloses a prior sale by Constantine Xykis of 26,005 shares on 08/12/2025 generating gross proceeds of $2,492,599. The notice includes the required signer representation about lack of undisclosed material adverse information.