Kaplan Fox & Kilsheimer LLP announced that a securities class action was filed against Planet Fitness, Inc. on behalf of investors who purchased or otherwise acquired the company’s securities from November 6, 2025, through May 6, 2026. The complaint alleges that Planet Fitness made materially false or misleading statements and omissions about customer-acquisition and marketing metrics. It says updated marketing messaging failed to resonate with and intimidated the company’s core audience of fitness beginners and casual gym-goers, creating a significant headwind for net member joins during the peak first-quarter sign-up period. The complaint further alleges that Planet Fitness’s previously issued fiscal 2026 guidance and long-term financial targets became unachievable. The company cut its same-store growth outlook from 4%-5% to 1% on May 7, 2026, withdrew a three-year growth algorithm and paused the national rollout of a planned Black Card price increase while prioritizing new-member growth. Its shares fell 31.2% that day to close at $44.01. Investors have until September 14, 2026, to seek appointment as lead plaintiff, although they do not need to do so to participate in any potential recovery.