SAN FRANCISCO – September 10, 2026 -- Hagens Berman Sobol Shapiro LLP has expanded a securities fraud class action against Pentair plc (NYSE: PNR), extending the class period back to March 11, 2025, from the original start date of April 28, 2026. The lead plaintiff deadline is set for October 2, 2026, giving investors who purchased Pentair stock during the newly expanded window until that date to seek appointment as lead plaintiff.