X0306 4 2022-02-22 0 0001782754 AZEK Co Inc. AZEK 0001331749 Hendrickson Gary E 1330 W. FULTON STREET SUITE 350 CHICAGO IL 60607 1 0 0 0 Class A Common Stock 2022-02-22 4 P 0 18500 26.92 A 178049 D Class A Common Stock 140892 I By Trust The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $26.80 to $27.00, inclusive. The reporting person undertakes to provide to AZEK, any security holder of AZEK, or the staff of the SEC, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote. /s/ Morgan Walbridge, as Attorney-in-Fact for Gary Hendrickson 2022-02-23