X0306 4 2020-06-16 0 0001782754 AZEK Co Inc. AZEK 0001331749 Hendrickson Gary E 1330 W FULTON STREET #350 CHICAGO IL 60607 1 0 0 0 Nonqualified stock option (right to buy) 23.00 2020-06-16 4 A 0 21740 0.00 A 2030-06-16 Class A common stock 21740 21740 D Restricted Stock Unit (RSU) 2020-06-16 4 A 0 1903 0.00 A Class A common stock 1903 1903 D Nonqualified stock option (right to buy) 23.00 2020-06-16 4 A 0 542699 0.00 A 2030-06-16 Class A common stock 542699 542699 D Includes 10,870 options that will vest if the applicable performance metrics are satisfied for the relevant measurement period and 6,522 options that will vest in equal installments on June 14, 2021 and 2022, subject to continued service through the applicable vesting date. Each RSU represents a contingent right to receive one share of the Issuer's Class A common stock upon settlement. The RSUs will vest on the earlier of (x) the one-year anniversary of the date of grant and (y) the Issuer's annual stockholder meeting for the following year, subject to continued service through the applicable vesting date. The options will vest in equal installments on June 16, 2021, 2022, 2023 and 2024, subject to continued service through the applicable vesting date. /s/ Paul J. Kardish, attorney-in-fact for Gary E. Hendrickson 2020-06-18