X0609 4 2026-09-15 0 0001713683 Zscaler, Inc. ZS 0002040014 Geller Adam false 120 HOLGER WAY SAN JOSE CA 95134 0 1 0 0 Chief Product Officer 1 Common Stock 2026-09-15 4 A 0 6817 0 A 49131 D Common Stock 2026-09-16 4 S 0 5578 192.7628 D 43553 D Common Stock 2026-09-17 4 S 0 4584 192.01 D 38969 D Represents restricted stock units granted upon achievement of certain FY26 performance metrics pursuant to performance-based restricted stock units granted October 15, 2025 under Zscaler's Amended and Restated Fiscal Year 2018 Equity Incentive Plan. The restricted stock units reported in this Form 4 were issued and vested on September 15, 2026. 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 the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on March 20, 2026. /s/ Torrie Nute, by power of attorney 2026-09-17