144 0002009289 XXXXXXXX LIVE 0001713683 ZSCALER, Inc. 001-38413 120 Holger Way San Jose CA 95134 408-533-0288 Michael Rich Officer Common Stock Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

11718 3289216 158300823 09/16/2025 NASDAQ Common Stock 09/15/2025 Vesting of Restricted Stock Units Issuer N 11718 09/15/2025 Compensation N Michael Rich

120 Holger Way San Jose CA 95134

Common Stock 06/17/2025 4287 1301970.9 Shares sold to cover tax withholding obligation mandated by Issuer's election under its equity incentive plans. 09/16/2025 /s/ Michael Rich