X0508 4 2025-11-25 0 0001596532 Arista Networks, Inc. ANET 0001605809 Ullal Jayshree 5453 GREAT AMERICA PARKWAY SANTA CLARA CA 95054 1 1 0 0 CEO and Chairperson 1 Common Stock 2025-11-25 4 S 0 2400 123.198 D 31559 D Common Stock 2025-11-25 4 S 0 8100 124.0545 D 23459 D Common Stock 2025-11-25 4 S 0 12742 125.0603 D 10717 D Common Stock 2025-11-25 4 S 0 800 125.6238 D 9917 D Common Stock 5383207 I By Trust for Child 1 Common Stock 5383207 I By Trust for Child 2 Common Stock 30000 I By Trust for Nephew Common Stock 30000 I By Trust for Niece Common Stock 18312010 I by Trust The exercises and/or sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 13, 2024. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $122.55 to $123.51, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $123.55 to $124.54, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $124.55 to $125.50, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $125.55 to $125.68, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. 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. By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Jayshree Ullal 2025-11-26