X0306 4 2014-12-03 0 0001596532 Arista Networks, Inc. ANET 0001605807 Sadana Anshul C/O ARISTA NETWORKS, INC. 5453 GREAT AMERICA PARKWAY SANTA CLARA CA 95054 0 1 0 0 SVP, Customer Engineering Common Stock 2014-12-03 2014-12-03 4 S 0 500 72.024 D 370000 D Common Stock 90000 I By Trust The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on September 11, 2014. These shares are held in a 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. /s/Marc Taxay Atty-in-Fact for Anshul Sadana 2014-12-04