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( Mark One ) X UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Delaware ( State or other jurisdiction of incorporation or organization ) FORM 10 - K OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Title of each class For the fiscal year ended July 31 , 2021 Common Stock , $ 0.001 Par Value For the transition period from _ to Commission File Number : 001-38413 ZSCALER , INC . ( Exact Name of Registrant as Specified in Its Charter ) Registrant's telephone number , including area code : ( 408 ) 533-0288 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) 120 Holger Way San Jose , California 95134 ( Address of principal executive offices ) ZS Securities registered pursuant to Section 12 ( g ) of the Act : None 26-1173892 ( I.R.S. Employer Identification Number ) Name of each exchange on which registered The Nasdaq Stock Market LLC Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act of 1933 , as amended . Yes No Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes No Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes No Indicate by check mark whether the registrant has submitted electronically , every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) Yes > No