Glancy Prongay Wolke & Rotter LLP, a leading national shareholder rights law firm, today announced that it is investigating potential claims against the board of directors of Power Solutions International, Inc. (“Power Solutions” or the “Company”) (NASDAQ: PSIX) concerning whether the board breached its fiduciary duties to shareholders.

IF YOU ARE A POWER SOLUTIONS INTERNATIONAL, INC. (PSIX) SHAREHOLDER, CLICK HERE TO PARTICIPATE.

What Is The Investigation About?

On November 6, 2025, after the market closed, Power Solutions released its third quarter 2025 financial results, revealing that “gross margin in the third quarter of 2025 was 23.9%, a decrease of 5.0%” year over year due in part to “temporary inefficiencies related to our accelerated production ramp-up” for “key data center product lines.” Further, the Company revealed it “anticipates … sales growth of 45%” for full year 2025, which indicated a sharp deceleration as the Company had reported year-over-year growth of 74% in the second quarter and 65% in the third quarter 2025.

On this news, Power Solutions’ stock price fell $15.55, or 19.14%, to close at $65.69 per share on November 7, 2025, on unusually heavy trading volume.

On March 2, 2026, after the market closed, Power Solutions issued a press release announcing fourth quarter and full year 2025 financial results, revealing that gross margin declined 8% year-over-year due to “operating inefficiencies related to [the Company’s] accelerated production ramp-up for data center product lines.” Further, the Company provided its outlook for 2026, including only “moderate margin improvement from the products serving data center markets.” The press release also revealed the Company was “executing specific actions to improve supply chain performance and manufacturing cost structures” but only now “beginning to see measurable improvements, which [it] expect to build and support margin expansion over time.”

Following these disclosures, Power Solutions stock fell $24.84 or 28.97% to close at $60.91 on March 3, 2026, on unusually heavy trading volume.

Contact Us To Participate or Learn More:

If you still hold Power Solutions shares purchased before May 2025 and wish to discuss this matter with us, or if you have any questions concerning this announcement or your rights or interests with respect to these matters, please contact us.

Charles Linehan, Esq.,
Glancy Prongay Wolke & Rotter LLP,
1925 Century Park East, Suite 2100,
Los Angeles, California 90067
Email: shareholders@glancylaw.com
Telephone: 310-201-9150 (Toll-Free: 888-773-9224)
Visit our website at www.glancylaw.com.
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Whistleblower Notice

Persons with non-public information regarding Power Solutions should consider their options to aid the investigation or take advantage of the SEC Whistleblower Program. Under the program, whistleblowers who provide original information may receive rewards totaling up to 30 percent of any successful recovery made by the SEC. For more information, call Charles H. Linehan at 310-201-9150 or 888-773-9224 or email shareholders@glancylaw.com.

About Glancy Prongay Wolke & Rotter LLP

GPWR is a premier law firm with decades of experience representing investors and consumers in securities litigation and other complex class action litigation. Recognizing the firm’s recent successes, GPWR was named one of Law360’s Securities Groups of the Year and ranked second-highest in total investor recoveries by Institutional Shareholder Services Securities Class Action Services in 2025. GPWR’s lawyers have handled cases covering a wide spectrum of corporate misconduct and relating to nearly all industries and sectors. GPWR’s past successes have been widely covered by leading news and industry publications such as The Wall Street Journal, The Financial Times, Bloomberg Businessweek, Reuters, the Associated Press, Barron’s, Investor’s Business Daily, Forbes, and Money. Prior results do not guarantee a similar outcome.

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