144 0002040014 XXXXXXXX LIVE 0001713683 ZSCALER, INC. 001-38413 120 Holger Way San Jose CA 95134 (408) 533-0288 ADAM GELLER Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

2817 345364.20 161709525 06/22/2026 NASDAQ Common 12/15/2025 Restricted Stock ISSUER N 2817 12/15/2025 Not Applicable N ADAM GELLER

120 Holger Way San Jose CA 95134

Common 06/16/2026 1940 245273.31 The securities to be sold were acquired upon the vesting of restricted stock during the period of 12/15/2025 through 6/15/2026. 06/22/2026 03/20/2026 /s/ Adam Geller