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Zscaler, Inc.
(Name of Registrant as Specified In Its Charter)

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 Your Vote Counts!  ZSCALER, INC. 120 HOLGER WAY  SAN JOSE, CALIFORNIA 95134  ZSCALER, INC.  2022 Annual Meeting  Vote by January 12, 2023  11:59 PM ET  Vote Virtually at the Meeting*  January 13, 2023  1:00 p.m., Pacific Time  Virtually at: www.virtualshareholdermeeting.com/ZS2022  *Please check the meeting materials for any special requirements for meeting attendance.  Smartphone users  Point your camera here and vote without entering a control number  V1.1  For complete information and to vote, visit www.ProxyVote.com  Control #  D93581-P82463  You invested in ZSCALER, 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 stockholder meeting to be held on January 13, 2023.  Get informed before you vote  View the Notice and Proxy Statement and Annual Report online OR you can receive a free paper or email copy of the material(s) by  requesting prior to December 30, 2022. If you would like to request a copy of the material(s) for this and/or future stockholder 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. 

 Vote at www.ProxyVote.com  THIS IS NOT A VOTABLE BALLOT  This is an overview of the proposals being presented at the upcoming stockholder meeting. Please follow the instructions on the reverse side to vote these important matters.  Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Sign up for E-delivery”.  Voting Items  Board Recommends  D93582-P82463  To elect three Class II directors to hold office until the 2025 annual meeting of stockholders or until their successors are elected and qualified, subject to their earlier death, resignation or removal.  Nominees:  Andrew Brown  Scott Darling  David Schneider  For  2. To ratify the selection of PricewaterhouseCoopers LLP as our independent registered public accounting firm for fiscal year 2023.  For  3. To approve on a non-binding, advisory basis, the compensation of our named executive officers.  For  NOTE: Such other business as may properly come before the meeting or any adjournment thereof.