Form 8-K Filing Summary

Power Solutions International, Inc. (the "Company") disclosed in a Form 8-K filing dated March 11, 2026, that it held investor calls on March 11, 2026. The Company became aware on March 12, 2026, that an unauthorized transcript of one of the calls was posted online. The Company disclaims this unauthorized post in its entirety. A summary of the calls is attached as Exhibit 99.1. The filing also includes forward-looking statements regarding the Company's prospects, subject to various risks and uncertainties. The Company has registered Common Stock, $0.001 par value per share, under the trading symbol PSIX on The Nasdaq Stock Market LLC. The filing details the Company's business, including its operations, financial performance, and strategic initiatives. The Company also addressed questions regarding its Q4 realignment efforts, gross margins, demand outlook, and the MTL acquisition. It expects margin improvements in the first half of 2026 and sees strong demand in the data center market. The Company is expanding warehouse and fabrication space and expects efficiency gains. It also discussed its approach to product margins, tax rates, customer information, and forward-looking statements, emphasizing its commitment to growth and operational improvements.