Sec Form 4 Filing - Simmons Jennifer @ Planet Fitness, Inc. - 2024-11-14

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Simmons Jennifer 2. Issuer Name and Ticker or Trading Symbol Planet Fitness, Inc. [ PLNT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Div President, Corp Stores (Last) (First) (Middle) 4 LIBERTY LANE WEST 3. Date of Earliest Transaction (MM/DD/YY) 11/14/2024 (Street) HAMPTON, NH03842 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A common stock 11/14/2024 M 1,486 A $ 19.27 23,894 D Class A common stock 11/14/2024 S 1,486 D $ 96.2292 ( 1 ) 22,408 D Class A common stock 11/14/2024 M 811 A $ 36.42 23,219 D Class A common stock 11/14/2024 S 811 D $ 96.2292 ( 1 ) 22,408 D Class A common stock 11/14/2024 M 690 A $ 70.44 23,098 D Class A common stock 11/14/2024 S 690 D $ 96.2292 ( 1 ) 22,408 D Class A common stock 11/14/2024 M 1,868 A $ 64.35 24,276 D Class A common stock 11/14/2024 S 1,868 D $ 96.2292 ( 1 ) 22,408 D Class A common stock 11/14/2024 M 2,356 A $ 78.35 24,764 D Class A common stock 11/14/2024 S 2,356 D $ 96.2292 ( 1 ) 22,408 D Class A common stock 11/14/2024 M 944 A $ 83.04 23,352 D Class A common stock 11/14/2024 S 944 D $ 96.2292 ( 1 ) 22,408 D Class A common stock 11/14/2024 S 3,298 D $ 96.1405 19,110 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Options (Right to buy) $ 19.27 11/14/2024 M 1,486 ( 2 ) 03/31/2027 Class A common stock 1,486 $ 0 0 D Stock Options (Right to buy) $ 36.42 11/14/2024 M 811 ( 3 ) 04/02/2028 Class A common stock 811 $ 0 0 D Stock Options (Right to buy) $ 70.44 11/14/2024 M 690 ( 4 ) 04/09/2029 Class A common stock 690 $ 0 0 D Stock Options (Right to buy) $ 64.35 11/14/2024 M 1,868 ( 5 ) 03/06/2030 Class A common stock 1,868 $ 0 0 D Stock Options (Right to buy) $ 78.35 11/14/2024 M 2,356 ( 6 ) 03/19/2031 Class A common stock 2,356 $ 0 786 D Stock Options (Right to buy) $ 83.04 11/14/2024 M 944 ( 7 ) 03/15/2032 Class A common stock 944 $ 0 945 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Simmons Jennifer 4 LIBERTY LANE WEST HAMPTON, NH03842 Div President, Corp Stores Signatures /s/ Justin Vartanian, Attorney-in-Fact 11/18/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $96.14 to $96.27, 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. ( 2 )The options vested in equal installments on each of March 31, 2018, 2019, 2020 and 2021 ( 3 )The options vested in equal installments on each of April 2, 2019, 2020, 2021 and 2022. ( 4 )The options vested in equal installments on each of April 9, 2020, 2021, 2022 and 2023. ( 5 )The options vested in equal installments on each of March 6, 2021, 2022, 2023 and 2024. ( 6 )The options vest in equal installments on each of March 19, 2022, 2023, 2024 and 2025. ( 7 )The options vest in equal installments on each of March 15, 2023, 2024, 2025 and 2026.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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