Bleichmar Fonti & Auld LLP has opened an investigation into Planet Fitness Inc. (NYSE: PLNT) for potential securities fraud after the fitness chain's stock lost 31% of its value in a single day, wiping out more than $2 billion in market capitalization.
"Planet Fitness failed to disclose that it could not sustain membership growth without a significant marketing overhaul and that its planned Black Card price increase was not viable," the law firm said in a statement announcing the probe.
The investigation covers investors who bought Planet Fitness shares between Nov. 6, 2025 and May 6, 2026. The lead plaintiff deadline is Sept. 14, 2026.
Planet Fitness on May 7 reported first-quarter results that revealed a dramatic slowdown. The company cut its same-store sales growth forecast to about 1% from a prior range of 4% to 5% — a target it had set just six months earlier. It also withdrew its long-term three-year growth algorithm entirely and paused the national rollout of a Black Card price increase, citing an "over-pivoted" marketing campaign that failed to connect with core customers.
The stock plunged $19.95 to close at $44.01 on May 7, its steepest single-day decline on record. Multiple law firms including the Law Offices of Frank R. Cruz, Schall Law Firm, and Pomerantz LLP have filed or announced similar class action claims.
The complaint alleges that Planet Fitness and its executives made materially false statements about the company's ability to grow membership and execute its pricing strategy. Specifically, the company overstated its growth outlook and exaggerated the effectiveness of its marketing campaigns, according to the lawsuit.
The 31% crash puts Planet Fitness shares at their lowest level since early 2023, testing support near the $40 level. Investors will watch for any additional disclosures from the company ahead of its second-quarter earnings report, expected in August.
This article is for informational purposes only and does not constitute investment advice.