HAMPTON, N.H., Oct. 27, 2025 /PRNewswire/ -- Planet Fitness, Inc. (NYSE: PLNT) (the "Company"), one of the largest and fastest-growing franchisors and operators of fitness centers with more members than any other fitness brand, has been named to Fortune's 2025 100 Fastest-Growing Companies List. The annual list, published by Fortune magazine, recognizes companies with exceptional growth in revenue, profits, and stock performance over a three-year period. The ranking is a result of Planet Fitness achieving ...