X0306 4 2016-12-30 false 0001637207 Planet Fitness, Inc. PLNT 0001649504 Grondahl Marc C/O PLANET FITNESS, INC. 26 FOX RUN ROAD NEWINGTON NH 03801 true false false false Class A Common Stock 2016-12-30 4 C false 60669.00 0.00 A 60669.00 I By Trust Class A Common Stock 2016-12-30 4 S false 60669.00 20.0613 D 0.00 I By Trust Holding Units and Class B common stock 2016-12-30 4 C false 60669.00 0.00 D Class A common stock 60669.00 5067317.00 I By Trust This transaction was effected pursuant to a Rule 10b5-1 trading plan. Following the transactions described herein, the Marc Grondahl Revocable Trust of 2006 holds 5,067,317 Holdings Units and corresponding shares of Class B common stock. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $20.00 to $20.13, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein. Pursuant to the terms of the Exchange Agreement dated as of August 5, 2015, as amended, by and among the Company, Pla-Fit Holdings, LLC and the holders from time to time of Holding Units and shares of Class B common stock, the holders thereof may exchange all or a portion of their Holding Units along with an equal number of shares of Class B common stock for shares of Class A common stock of the Company on a one-to-one basis (one Holding Unit and one share of Class B common stock together exchangeable for one share of Class A common stock). The holders thereof are not required to pay an exercise price in connection with any such exchange. The Holding Units do not expire. The Class B common stock provides the holder with one vote on all matters submitted to a vote of the Company's stockholders but does not entitle the holder to any of the economic rights associated with shares of the Company's Class A common stock. Justin Vartanian is signing on behalf of Mr. Grondahl pursuant to a Power of Attorney dated July 29, 2015, which was previously filed with the Securities and Exchange Commission. /s/ Justin Vartanian, Attorney-in-Fact 2017-01-04