Power Solutions Investors Face May 19 Deadline to Seek Lead Plaintiff Role

Overview

• Investor law firms, including Faruqi & Faruqi and Rosen, are urging Power Solutions International (PSIX) shareholders to move by May 19, 2026 to serve as lead plaintiff in a filed federal securities class action.
• The lead plaintiff, typically the investor with the largest losses, directs the case for the proposed class, and no investors are represented until the court certifies a class or they retain counsel.
• The lawsuit targets purchases from May 8, 2025 through March 2, 2026 and claims the company overstated its ability to capture data-center demand and downplayed costs and inefficiencies from a rapid production ramp-up.
• Financial updates on November 6, 2025 reported a 5 percentage point year-over-year gross-margin drop tied to ramp-up inefficiencies, and the stock fell 19% the next trading day.
• Results released March 2, 2026 showed an 8% yearly gross-margin decline and only moderate margin improvement expected for data-center products, and shares dropped about 29% the following day.