X0306 4 2015-05-14 0 0001596532 Arista Networks, Inc. ANET 0001605809 Ullal Jayshree C/O ARISTA NETWORKS, INC. 5453 GREAT AMERICA PARKWAY SANTA CLARA CA 95054 1 1 1 0 President and CEO Common Stock 2015-05-14 2015-05-14 4 S 0 2089 69 D 4017720 I By Family Trust Common Stock 2015-05-14 2015-05-14 4 S 0 1190 69 D 92860 I By trust for niece Common Stock 2015-05-14 2015-05-14 4 S 0 1190 69 D 92860 I By trust for nephew Common Stock 2015-05-14 2015-05-14 4 S 0 6850 69 D 1463400 I By trust for child #1 Common Stock 2015-05-14 2015-05-14 4 S 0 6850 69 D 1463400 I By trust for child #2 Common Stock 2015-05-14 2015-05-14 4 S 0 3071 69 D 154929 I By Foundation The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 12, 2014. These shares are held of record by the 2000 Ullal Family Trust of which the reporting person is a co-trustee. These shares are held in trust for the benefit of a relative of the reporting person for which the reporting person serves as co-trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares. These shares are held in a trust for benefit of a child of the reporting person for the which the reporting person serves as co-trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares. These shares are held by a 501(c)(3) Foundation for which the reporting person and her husband serve as corporate officers. The reporting person shares voting and investment control over the shares with her husband, but disclaims beneficial ownership of the shares. Marc Taxay Atty-in-Fact for Jayshree Ullal 2015-05-15