X0609 4 2026-10-06 0 0001596532 Arista Networks, Inc. ANET 0001850596 Breithaupt Chantelle Yvette false 5453 GREAT AMERICA PARKWAY SANTA CLARA CA 95054 0 1 0 0 Senior Vice President, CFO 1 Common Stock 2026-10-06 4 S 0 1224 215.0 D 68697 D The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on December 11, 2025 and modified on June 2, 2026. By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Chantelle Breithaupt 2026-10-08