X0306 4 2020-02-20 0 0001596532 Arista Networks, Inc. ANET 0001201938 TEMPLETON MARK B 5453 GREAT AMERICA PARKWAY SANTA CLARA CA 95054 1 0 0 0 Common Stock 2020-02-20 4 M 0 436 0.0 A 4803 D Restricted Stock Unit-1 0.0 2020-02-20 4 M 0 436 0.0 D Common Stock 436 437 D Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting. 1/12th of the 5,240 restricted stock units awarded vested on August 20, 2017 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, or November 20 of each year. By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Mark B. Templeton 2020-02-24