X0306 4 2020-06-16 0 0001782754 AZEK Co Inc. AZEK 0001814578 Kitchen Dennis M 1330 W FULTON STREET #350 CHICAGO IL 60607 0 1 0 0 See Remarks Nonqualified stock option (right to buy) 23.00 2020-06-16 4 A 0 86956 0.00 A 2030-06-16 Class A common stock 86956 86956 D Includes 43,478 options that will vest if the applicable performance metrics are satisfied for the relevant measurement period and 17,391 options that will vest in equal installments on December 6, 2020 and 2021, subject to continued service through the applicable vesting date. Senior Vice President and Chief Human Resources Officer /s/ Paul J. Kardish, attorney-in-fact for Dennis M. Kitchen 2020-06-18