NEW YORK, July 15 — $1 billion. That is the figure that matters for investors considering their next move against Planet Fitness. Block & Leviton, the Boston-based law firm that has recovered over $1 billion for investors in securities class actions, announced July 14 that a securities fraud lawsuit has been filed against the gym chain and certain of its executives.
The lawsuit, filed in the United States District Court for the District of New Hampshire, alleges violations of the Securities Exchange Act of 1934. Planet Fitness is headquartered in Hampton, New Hampshire, and operates over 2,400 gyms worldwide.
The company trades on the New York Stock Exchange under the ticker PLNT.
The class period and the claims
Investors who purchased Planet Fitness securities between February 13, 2024 and June 11, 2025 — the class period — may be affected. The complaint claims that defendants made false and misleading statements regarding the company’s business operations and growth strategy. By the numbers, the class period spans roughly 16 months.
The lead plaintiff deadline is September 12, 2026, giving investors roughly two months to act. The core allegation centers on Planet Fitness’s ‘High Volume’ store model.
The complaint alleges that the company failed to disclose that this model was not sustainable. Investors will note that the alleged misrepresentations go to the heart of Planet Fitness’s expansion strategy — a strategy that has driven the chain to over 2,400 locations globally.
What the complaint alleges
The bottom line: the lawsuit contends that Planet Fitness was experiencing declining same-store sales and membership growth during the class period, and that executives did not properly disclose these trends. The company’s public statements during that window are now under legal scrutiny. Block & Leviton is handling the case.
The firm has a track record in securities class actions, having recovered over $1 billion for investors in previous cases. The firm’s announcement on July 14 put the market on notice that the litigation is now active.
The figure that matters for current Planet Fitness shareholders is the September 12 lead plaintiff deadline. That date determines who can serve as the primary representative for the class of investors who bought PLNT securities during the class period.
What to watch next
Planet Fitness has not yet filed a response to the complaint in the District of New Hampshire. The case will proceed under the Private Securities Litigation Reform Act, which governs securities fraud class actions. Investors who purchased shares between February 13, 2024 and June 11, 2025 should watch for court filings and the lead plaintiff determination process.
The lawsuit adds legal risk to a company that has built its brand on affordable, high-volume gym memberships. Whether the ‘High Volume’ model proves sustainable in court — and in the market — is the question that now hangs over PLNT stock.
