X0609 4 2026-09-08 0 0001596532 Arista Networks, Inc. ANET 0001605808 Duda Kenneth false 5453 GREAT AMERICA PARKWAY SANTA CLARA CA 95054 1 1 0 0 President and CTO 0 Common Stock 2026-09-08 4 J 0 100000 0.0 A 720720 I By GRAT JD Common Stock 2026-09-08 4 J 0 100000 0.0 A 719237 I By GRAT KD Common Stock 2026-09-08 4 J 0 200000 0.0 D 24695 I by Trust Common Stock 12976 D Common Stock 1186918 I By Childrens' Trust Common Stock 452400 I By Foundation Represents 100,000 shares transferred from the Family Trust to the GRAT of the Reporting Person's Spouse. Reporting person's spouse is the trustee of the Jennifer Duda Annuity Trusts. Represents 100,000 shares transferred from the Family Trust to the GRAT of the Reporting Person. Reporting person is the trustee of the Kenneth Duda Annuity Trusts. Represents an aggregate of 200,000 shares contributed to the GRAT of the Reporting Person (100,000 shares), and GRAT of the Reporting Person's spouse (100,000 shares) These shares are held by a family trust for which the reporting person is co-trustee. These shares are held in multiple trusts 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 by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee. By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Kenneth Duda 2026-09-10