X0306 4 2021-01-06 false 0001637207 Planet Fitness, Inc. PLNT 0001798770 O'Donnell Brian 4 LIBERTY LANE WEST HAMPTON NH 03842 false true false false VP, Chief Accounting Officer Common Stock 2021-01-06 4 S false 26.00 78.28 D 2409.00 D This transaction was effected pursuant to a prior written plan to sell shares of the issuer's Class A common stock in order to pay taxes owed in conjunction with the vesting of restricted stock units with respect to the issuer's common stock that vested on the date of the transaction. Brian O'Donnell 2021-01-08