X0306 4/A 2017-12-13 2017-12-15 0 0001596532 Arista Networks, Inc. ANET 0001605808 Duda Kenneth C/O ARISTA NETWORKS, INC. 5453 GREAT AMERICA PARKWAY SANTA CLARA CA 95054 0 1 0 0 CTO and SVP Software Eng. Common Stock 2017-12-19 4 S 0 127576 235.1546 D 889568 I by Trust On December 13, 2017, the reporting person made an irrevocable contribution of 130,000 shares of ANET common stock to an exchange fund in exchange for shares of the exchange fund. Upon the closing of the exchange fund on December 19, 2017, 127,576 shares of ANET common stock contributed by the reporting person were accepted by the exchange fund. The reporting person is amending this Form 4 to reflect the final number of shares accepted by the exchange fund and the value of such shares. These shares are held by a family trust for which the reporting person is a trustee. Marc Taxay, Attorney-in-Fact for Kenneth Duda 2017-12-21