Investors who bought Planet Fitness (PLNT) stock between November 6, 2025 and May 6, 2026 may be covered by a proposed securities class action alleging Planet Fitness misled investors about its marketing, Black Card pricing plans and growth outlook. No class has been certified and there is nothing to file yet.
Allegations Only · No Settlement Yet
This article describes a class action complaint. The statements below are unproven allegations. Planet Fitness has not been found liable, there is no certified class, and nothing to claim at this time. This page is informational and is not legal advice.
What Is This About?
A Planet Fitness shareholder filed a proposed securities class action on July 14, 2026 in the U.S. District Court for the District of New Hampshire, Matsunaga v. Planet Fitness, Inc., No. 1:26-cv-00576. The complaint names Planet Fitness, Inc., CEO Colleen Keating and CFO Jay Stasz, and alleges they misled investors about how well the company's marketing was working, its planned Black Card price increase and its 2026 and three-year growth outlook. The case is at the complaint stage: no class has been certified and there is nothing to claim.Free settlement alerts
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What the Complaint Alleges
According to the complaint, Planet Fitness spent the class period telling investors its brand was healthy, its "We Are All Strong on This Planet" marketing was working, and its high-value, low-price membership model could support a national rollout of a higher Black Card price. In November 2025 it introduced a three-year growth outlook built on membership growth and rate increases.The plaintiff alleges that, behind those statements, the updated marketing was failing to connect with, and was putting off, the beginners and casual gym-goers who make up the company's core audience. The complaint says this slowed new member sign-ups during the first quarter, the busiest joining season of the year, and made the company's 2026 guidance and long-term targets unreachable. These are allegations only; none has been proven in court.
The May 7, 2026 Disclosure
On May 7, 2026, Planet Fitness reported first-quarter 2026 results. The complaint says the company cut its expected 2026 system-wide same club sales growth from the 4% to 5% range to about 1%, withdrew the three-year outlook it had introduced about six months earlier, and paused the national rollout of the Black Card price increase to focus on new member growth. The company pointed to marketing that had shifted too far from its core members, along with competition, economic conditions and weather.The complaint says PLNT closed at $63.96 on May 6, 2026 and fell to $44.01 on May 7, a one-day drop of about 31%.
Claims and What Happens Next
The complaint brings two counts: securities fraud under Section 10(b) of the Securities Exchange Act of 1934 and SEC Rule 10b-5 against all defendants, and control-person liability under Section 20(a) against the two executives. It asks for damages for investors who bought during the class period.Under the Private Securities Litigation Reform Act, investors had until September 14, 2026 to ask the court to appoint them lead plaintiff. The next steps are the court's choice of lead plaintiff and lead counsel, an amended complaint, and a likely motion to dismiss from the defendants. Securities cases that survive that motion often take several years to resolve, whether by settlement or trial. Investors who bought during the class period do not need to do anything now to stay part of the proposed class.
Questions
Who is covered by the Planet Fitness securities class action?
The proposed class is investors who purchased or otherwise acquired Planet Fitness, Inc. common stock between November 6, 2025 and May 6, 2026, inclusive. No class has been certified.
Is this lawsuit about Planet Fitness gym memberships?
No. This is a federal securities case brought for shareholders who say they bought PLNT stock at inflated prices. It does not cover gym members, membership fees or Black Card charges.
Can I file a claim in the Planet Fitness securities lawsuit?
Not yet. There is no settlement and no claim form. If the case settles or ends in a judgment for the class, eligible investors would be notified and asked to file a claim with proof of their trades.
Has the lead plaintiff deadline passed?
Yes. Motions to be appointed lead plaintiff were due September 14, 2026. Investors do not need to be lead plaintiff to share in any future recovery.
What does Planet Fitness say about the allegations?
The company had not filed a response to the complaint as of the date of this article. The allegations have not been proven, and Planet Fitness and the two executives named have not been found liable.
Sources
- Class action complaint, filed July 14, 2026 (CourtListener)
- Court docket — Matsunaga v. Planet Fitness, Inc., No. 1:26-cv-00576 (D.N.H.) (CourtListener)
- Kaplan Fox — PLNT lead plaintiff deadline September 14, 2026 (GlobeNewswire)
