US Fitness Club Stocks Plunge 30% Due to Earnings Shock, Rebound 7% in One Day

(PLANET FITNESS INC: PLNT) shares jumped 6.8% to close at $49 on the New York Stock Exchange on the 10th. Market capitalization swelled to about $3.8 billion (roughly KRW 5 trillion), adding around $300 million (approximately KRW 400 billion) in value in a single day.

On the 7th, after reporting first-quarter results showing revenue up about 22% year-over-year, the company sharply cut its 2026 revenue and earnings growth forecasts and announced it would halt increases in its Black Card membership fees—moves that had driven the stock down more than 30%. On the 8th, a Form 4 filing revealed that a trust linked to independent director Francis J. Latsky purchased 5,000 shares on the open market at $46.21 each. Investors interpreted this as a ‘buy-the-dip’ signal from management following the stock’s decline.

Planet Fitness is a low-cost monthly-fee fitness club franchise in the U.S. It operates over 2,500 locations—primarily in North America—and serves about 21.5 million members. In Q1 2026, same-store sales rose 3.5%, demonstrating solid performance, but membership growth during the key start-of-year season fell short of expectations, prompting the company to adjust its growth strategy.