X0609 4 2026-05-20 0 0001596532 Arista Networks, Inc. ANET 0001605809 Ullal Jayshree false 5453 GREAT AMERICA PARKWAY SANTA CLARA CA 95054 1 1 0 0 CEO and Chairperson 0 Common Stock 2026-05-20 4 M 0 27664 0.0 A 37581 D Common Stock 2026-05-20 4 F 0 13855 141.58 D 23726 D Common Stock 5209207 I By Trust for Child 1 Common Stock 5209207 I By Trust for Child 2 Common Stock 30000 I By Trust for Nephew Common Stock 30000 I By Trust for Niece Common Stock 17482010 I by Trust Restricted Stock Unit-8 0.0 2026-05-20 4 M 0 27664 0.0 D Common Stock 27664 82996 D Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting. Represents shares withheld to satisfy tax withholding obligations on the vesting of restricted stock units. These shares are held in trust for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares. These shares are held in trust for the benefit of relatives of the reporting person for which the reporting person serves as co-trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares. These shares are held by a family trust for which the reporting person is co-trustee. This performance stock award was granted in the first quarter of 2023 and was earned based on attainment of certain performance conditions. The award vested (25%) on February 20, 2024, and will continue to vest quarterly over 3 years. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year. By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Jayshree Ullal 2026-05-22