X0306 4 2016-05-20 0 0001596532 Arista Networks, Inc. ANET 0001605733 2010 David R Cheriton Irrevocable Trust dtd July 28, 2010 C/O SOUTH DAKOTA TRUST COMPANY 201 SOUTH PHILLIPS AVE., SUITE 200 SIOUX FALLS SD 57104 0 0 1 0 Common Stock 2016-05-20 2016-05-20 4 S 0 175095 68.5975 D 7262981 D The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.50 to $68.89, 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. Jeanice Caselli, VP and Trust Officer South Dakota Trust Company LLC, TTEE 2016-05-24