New York, New York--(Newsfile Corp. - March 25, 2026) - Rosen Law Firm, a global investor rights law firm, announces an investigation of potential breaches of fiduciary duties by the directors and officers of Five9, Inc. (NASDAQ: FIVN). If you currently own shares of Five9, Inc. stock, please visit the firm's website at https://rosenlegal.com/submit-form/?case_id=32046 for more information.