SAN DIEGO, Oct. 01, 2025 (GLOBE NEWSWIRE) -- Johnson Fistel, PLLP, a leading stockholder rights law firm, is investigating potential claims on behalf of Monolithic Power Systems, Inc. (NASDAQ: MPWR) against certain officers and directors for breaches of fiduciary duties and violations of federal securities laws. What is Johnson Fistel Investigating?A previously filed securities fraud class action Complaint alleges that, Monolithic Power Systems, Inc., via certain of its officers, made false and/or misleadin ...