X0306 4 2020-01-10 0 0001596532 Arista Networks, Inc. ANET 0001605808 Duda Kenneth 5453 GREAT AMERICA PARKWAY SANTA CLARA CA 95054 0 1 0 0 CTO and SVP Software Eng. Common Stock 2020-01-10 4 S 0 481 207.039 D 61411 I By Childrens' Trust Common Stock 2020-01-10 4 S 0 393 208.4954 D 61018 I By Childrens' Trust Common Stock 2020-01-10 4 S 0 3918 207.3109 D 502539 I by Trust Common Stock 2020-01-10 4 S 0 5363 208.4815 D 497176 I by Trust Common Stock 2020-01-10 4 S 0 719 209.1014 D 496457 I by Trust Common Stock 3987 D Common Stock 2575 I By Foundation Common Stock 153944 I By GRAT JD Common Stock 153944 I By GRAT KD The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person for the benefit of the reporting persons children on December 12, 2018. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $206.93 to $207.23 inclusive. The reporting person undertakes to provide 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 $208.01 to $208.77 inclusive. The reporting person undertakes to provide 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 sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 8, 2019. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $206.845 to $207.82 inclusive. The reporting person undertakes to provide 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 $207.88 to $208.85 inclusive. The reporting person undertakes to provide 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 $208.88 to $209.57 inclusive. The reporting person undertakes to provide 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. These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee. Reporting person's spouse is the trustee of the Jennifer Duda Annuity Trusts. Reporting person is the trustee of the Kenneth Duda Annuity Trusts. By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Kenneth Duda 2020-01-14