X0306 4 2020-01-17 0 0001596532 Arista Networks, Inc. ANET 0001605698 Scheinman Daniel 5453 GREAT AMERICA PARKWAY SANTA CLARA CA 95054 1 0 0 0 Common Stock 2020-01-17 4 M 0 8000 7.76 A 15606 D Common Stock 2020-01-17 4 M 0 1333 30.67 A 16939 D Common Stock 2020-01-17 4 S 0 9333 220.0641 D 7606 D Non-Qualified Stock Option (right to buy) 7.76 2020-01-17 4 M 0 8000 0.0 D 2023-03-10 Common Stock 8000 0 D Non-Qualified Stock Option (right to buy) 30.67 2020-01-17 4 M 0 1333 0.0 D 2024-02-10 Common Stock 1333 18667 D This exercise/sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 5, 2019. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $220.00 to $220.74, 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. 1/60th of the 10,000 shares subject to the option vested and became exercisable on December 1, 2014, and 1/60th of the shares subject to the option vest monthly thereafter. 1/4th of the 20,000 shares subject to the option vested and became exercisable on Dec 1, 2016, and 1/48th of the shares subject to the option vest monthly thereafter. By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Daniel Scheinman 2020-01-21