X0508 4 2025-12-16 0 0001713683 Zscaler, Inc. ZS 0002009289 Rich Michael J. 120 HOLGER WAY SAN JOSE CA 95134 0 1 0 0 CRO and President of WW Sales 0 Commom Stock 2025-12-16 4 S 0 4100 230.8193 D 107497 D Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units as mandated by the Issuer's election under its equity incentive plans and does not represent a discretionary trade by the Reporting Person. Includes 45 shares acquired under the Issuer's Fiscal Year 2018 Employee Stock Purchase Plan on December 15, 2025. /s/ Torrie Nute, by power of attorney 2025-12-17