in this Current Report on Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and will not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in suc…

Chief Executive Officer — Nan (Richard) Hu: The company appointed a new CEO from an external search.

Chief Executive Officer — Constantine ('Dino') Xykis: The CEO resigned and was replaced by the CFO as Interim Chief Executive Officer.

in this Current Report on Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and will not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in suc…

Regulation FD Disclosure On March 11, 2026, Power Solutions International, Inc. (the “Company”) held two investors’ calls, attended by pre-registered investors and analysts who had requested the opportunity to speak with management. On March 12, 2026, the Company became aware that shortly after the calls, an unknown attendee posted on X (formerly Twitter) a purported transcript of one of the calls, despite instructions on the calls that the calls were not to be recorded or disseminated. The p…

The filing describes a new compensatory plan and does not involve any management changes.

in this Current Report on Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and will not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in suc…

in this Current Report on Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and will not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in suc…

Director — Kui (Kevin) Jiang, Gengsheng Zhang: Two directors resigned and were replaced by new appointees.

General Counsel and Corporate Secretary — Zhaoying (Dorothy) Du: The company appointed an experienced General Counsel and Corporate Secretary.

in this Current Report on Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and will not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in suc…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information included in

Entry into a Material Definitive Agreement. On July 30, 2025, Power Solutions International, Inc. (the “Company” or “PSI”) entered into a second amendment (the “Amendment”) to its existing Uncommitted Revolving Credit Agreement (the “Existing Credit Agreement” and as amended, the “Amended Credit Agreement”) with Standard Chartered Bank, as administrative agent (“Standard Chartered”), and the lenders party thereto from time to time. The Amended Credit Agreement allows the Company to borrow up…

Director — Kenneth W. Landini: Mr. Landini resigned from the Board due to disagreements with the majority of the Board.

in this Current Report on Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and will not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in suc…

General Counsel — Randall D. Lehner: Mr. Lehner's employment agreement was mutually terminated with a severance package.

in this Current Report on Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and will not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in suc…

Other Events. On December 26, 2024, Power Solutions International, Inc. (the “Company” or “PSI”) uplisted its common stock to the Nasdaq Stock Market (“Nasdaq”) and began trading on that market. The Company will continue to trade under the symbol PSIX. In connection with the Company’s listing on Nasdaq, the Company has elected to rely on the controlled company exemptions with respect to the independence of the Board overall as well as members on its Compensation Committee and Nominating and G…

in this Current Report on Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and will not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in suc…

Entry into a Material Definitive Agreement. On August 30, 2024, Power Solutions International, Inc. (the “Company” or “PSI”) closed on its new uncommitted senior secured revolving credit agreement (the “Credit Agreement”), with Standard Chartered Bank, as administrative agent (“Standard Chartered”), and the lenders party thereto from time to time. The Credit Agreement allows the Company to borrow up to $120 million and expires on August 30, 2025. As part of the closing of the Credit Agreement…

and Exhibit 99.1 hereto shall not be deemed “filed” for purposes of Section 18 of the Securities and Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933 (the “Securities Act”) or the Exchange Act, except as shall be expressly set forth by reference in such a filing. Caution Regarding Forward-Looking Statements This Form 8-K contains forward-looking statements regarding the current expectations of the Company about…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information included in

in this Current Report on Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and will not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in suc…

Director and Chairman of the Nominating and Corporate Governance Committee — Shaojun Sun: Dr. Shaojun Sun resigned from the Board of Directors and was succeeded by Kui Jiang.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information included in