X0306 4 2021-05-18 0 0001782754 AZEK Co Inc. AZEK 0001635164 HECKES HOWARD C 1330 WEST FULTON STREET SUITE 350 CHICAGO IL 60607 1 0 0 0 Class A Common Stock 2021-05-18 4 A 0 1982 0.00 A 6423 D Grant of time-vesting restricted stock units made to directors on May 18, 2021 pursuant to Rule 16b-3(d) plan that will vest on the earlier of (x) the one-year anniversary of the date of grant and (y) the Issuer's next annual stockholder meeting. Settlement of the time-vesting restricted stock units has been deferred until the termination of the reporting person's service as a director of the Company. Includes (i) 1,982 restricted stock units that will vest on the earlier of (x) the one-year anniversary of the date of grant and (y) the Issuer's next annual stockholder meeting and (ii) 3,064 restricted stock units that will vest on December 4, 2023 subject to continued service through the vesting date. /s/ Morgan Fox Walbridge, as Attorney-in-Fact for Howard Heckes 2021-05-20