azek-defa14a_20220127.htm

Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. __)


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Your Vote Counts! THE AZEK COMPANY INC. 2022 Annual Meeting Vote by March 7, 2022 11:59 PM ET THE AZEK COMPANY INC. 1330 W FULTON STREET, #350 CHICAGO, IL 60607 D65767-P64933 You invested in THE AZEK COMPANY INC. and it’s time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy material for the shareholder meeting to be held on March 8, 2022. Get informed before you vote View the Notice, Proxy Statement and Annual Report online OR you can receive a free paper or email copy of the material(s) by request prior to February 22, 2022. If you would like to request a copy of the material(s) for this and/or future shareholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. For complete information and to vote, visit www.ProxyVote.com Control # Smartphone users Point your camera here and vote without entering a control number Vote Virtually at the Meeting* March 8, 2022 10:00 AM EST Virtually at: www.virtualshareholdermeeting.com/AZEK2022 *Please check the meeting materials for any special requirements for meeting attendance. V1.1

Vote at www.ProxyVote.com THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming shareholder meeting. Please follow the instructions on the reverse side to vote these important matters. Board Recommends Voting Items 1. Election of Directors Nominees: For 01) Fumbi Chima 02) Brian Spaly 2. To ratify the appointment of PricewaterhouseCoopers LLP as our independent registered public accounting firm for our fiscal year ending September 30, 2022. For 3. To approve, on an advisory, non-binding basis, the frequency of advisory votes on the compensation of our named executive officers. 1 Year 4. To approve amendments to our certificate of incorporation to remove supermajority voting requirements to amend our certificate of incorporation and bylaws. For 5. To approve amendments to our certificate of incorporation to declassify our board of directors and phase-in annual director elections. For 6. To approve our adoption of the 2021 Employee Stock Purchase Plan. For Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Sign up for E-delivery”. D65768-P64933

Your Vote Counts! THE AZEK COMPANY INC. 2022 Annual Meeting Vote by March 7, 2022 11:59 PM ET THE AZEK COMPANY INC. 1330 W FULTON STREET, #350 CHICAGO, IL 60607 D65769-P64933 You invested in THE AZEK COMPANY INC. and it’s time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy material for the shareholder meeting to be held on March 8, 2022. Get informed before you vote View the Notice, Proxy Statement and Annual Report online OR you can receive a free paper or email copy of the material(s) by request prior to February 22, 2022. If you would like to request a copy of the material(s) for this and/or future shareholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. For complete information and to vote, visit www.ProxyVote.com Control # Smartphone users Point your camera here and vote without entering a control number Vote Virtually at the Meeting* March 8, 2022 10:00 AM EST Virtually at: www.virtualshareholdermeeting.com/AZEK2022 *Please check the meeting materials for any special requirements for meeting attendance. V1.1

Vote at www.ProxyVote.com THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming shareholder meeting. Please follow the instructions on the reverse side to vote these important matters. Board Recommends Voting Items 2. To ratify the appointment of PricewaterhouseCoopers LLP as our independent registered public accounting firm for our fiscal year ending September 30, 2022. For 3. To approve, on an advisory, non-binding basis, the frequency of advisory votes on the compensation of our named executive officers. 1 Year 4. To approve amendments to our certificate of incorporation to remove supermajority voting requirements to amend our certificate of incorporation and bylaws. For 5. To approve amendments to our certificate of incorporation to declassify our board of directors and phase-in annual director elections. For 6. To approve our adoption of the 2021 Employee Stock Purchase Plan. For Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Sign up for E-delivery”. D65770-P64933