X0306 4 2020-01-02 0 0001596532 Arista Networks, Inc. ANET 0001672685 Taxay Marc 5453 GREAT AMERICA PARKWAY SANTA CLARA CA 95054 0 1 0 0 SVP and General Counsel Common Stock 2020-01-02 4 M 0 166 22.49 A 7449 D Common Stock 2020-01-02 4 M 0 166 30.67 A 7615 D Common Stock 2020-01-02 4 M 0 167 68.34 A 7782 D Common Stock 2020-01-02 4 M 0 167 64.46 A 7949 D Common Stock 2020-01-02 4 M 0 167 56.24 A 8116 D Common Stock 2020-01-02 4 M 0 250 65.01 A 8366 D Common Stock 2020-01-02 4 S 0 980 203.7629 D 7386 D Common Stock 2020-01-02 4 S 0 420 204.5918 D 6966 D Common Stock 2020-01-02 4 S 0 420 205.7448 D 6546 D Common Stock 2020-01-02 4 S 0 180 206.6789 D 6366 D Non-Qualified Stock Option (right to buy) 22.49 2020-01-02 4 M 0 166 0.0 D 2024-01-12 Common Stock 166 667 D Non-Qualified Stock Option (right to buy) 30.67 2020-01-02 4 M 0 166 0.0 D 2024-02-10 Common Stock 166 667 D Non-Qualified Stock Option (right to buy) 56.24 2020-01-02 4 M 0 167 0.0 D 2026-02-11 Common Stock 167 4333 D Non-Qualified Stock Option (right to buy) 64.46 2020-01-02 4 M 0 167 0.0 D 2025-09-10 Common Stock 167 3833 D Non-Qualified Stock Option (right to buy) 65.01 2020-01-02 4 M 0 250 0.0 D 2026-04-07 Common Stock 250 3750 D Non-Qualified Stock Option (right to buy) 68.34 2020-01-02 4 M 0 167 0.0 D 2024-12-15 Common Stock 167 3833 D The exercise and sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on September 11, 2019. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $203.25 to $204.24, 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 $204.28 to $205.17, 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 $205.295 to $206.29, 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 $206.41 to $206.97, 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. 1/5th of the 10,000 shares subject to the option vested and became exercisable on May 1, 2016 and 1/60th of the shares subject to the option shall vest monthly thereafter. 1/60th of the 10,000 shares subject to the option vested and became exercisable on April 1, 2017 and 1/60th of the shares subject to the option shall vest monthly thereafter. 1/5th of the 10,000 shares subject to the option vested and became exercisable on December 1, 2017 and 1/60th of the shares subject to the option shall vest monthly thereafter. 1/60th of the 15,000 shares subject to the option vested and became exercisable on April 28, 2016 and 1/60th of the shares subject to the option shall vest monthly thereafter. 1/5th of the 10,000 shares subject to the option vested and became exercisable on December 1, 2017 and 1/60th of the shares subject to the option shall vest monthly thereafter. By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Marc Taxay 2020-01-06