Overview

A class action lawsuit has been filed against Power Solutions International, Inc. (“Power Solutions” or the “Company”) (NASDAQ : PSIX) and certain of the Company’s senior officers (collectively, “Defendants”), alleging violations of the federal securities laws. The Power Solutions lawsuit is brought on behalf of all persons and entities who purchased or otherwise acquired Power Solutions securities between May 8, 2025, and March 2, 2026, inclusive (the “Class Period”). Investors have until May 19, 2026, to seek appointment as lead plaintiff of the Power Solutions class action lawsuit.

Power Solutions designs and manufactures engines and power systems. During the Class Period, the Company emphasized its strategic pivot toward the rapidly growing data center market. Defendants repeatedly touted this shift as driving strong demand, accelerating revenue growth, and improving margins, while assuring investors that manufacturing expansions would efficiently support this growth.

The complaint alleges that these statements were materially false and misleading because Defendants overstated the Company’s ability to capture demand in the data center market and understated the costs and operational inefficiencies associated with rapidly scaling production. In reality, the Company’s manufacturing ramp-up created significant inefficiencies that adversely impacted margins and performance.

The truth began to emerge on November 6, 2025, when Power Solutions disclosed declining gross margins tied to production inefficiencies and issued weaker-than-expected growth guidance. On this news, Power Solutions’ stock price fell $15.55, or more than 19%, to close at $65.69 per share on November 7, 2025.  

Then, on March 2, 2026, Power Solutions reported further margin deterioration, acknowledged ongoing operational inefficiencies, and projected only modest improvement going forward. On this news, Power Solutions stock fell $24.84 or nearly 29% to close at $60.91 per share on March 3, 2026.

Notably, during the Class Period, Power Solutions’ CEO sold substantial portions of his personally held Company stock, including near peak stock prices, before the Company disclosed declining margins and operational inefficiencies that caused significant stock price declines.

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If you purchased or otherwise acquired Power Solutions securities between May 8, 2025, and March 2, 2026, and you wish to serve as lead plaintiff in this lawsuit, you are encouraged to submit your information to DiCello Levitt LLP via the form on this page. 

You can also contact DiCello Levitt attorneys Brian O’Mara and Hani Farah by calling (888) 287-9005 or at investors@dicellolevitt.com. 

The deadline to apply to the Court to serve as a lead plaintiff in the Power Solutions class action lawsuit is May 19, 2026.