X0508 4 2025-12-16 0 0001713683 Zscaler, Inc. ZS 0002040014 Geller Adam 120 HOLGER WAY SAN JOSE CA 95134 0 1 0 0 Chief Product Officer 1 Commom Stock 2025-12-16 4 S 0 2060 230.8193 D 52148 D Commom Stock 2025-12-17 4 S 0 1620 232.79 D 50528 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. The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2025. /s/ Torrie Nute, by power of attorney 2025-12-17