X0306 4 2022-08-22 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 2022-08-22 4 M 0 4000 0.0 A 32855 I by Trust Common Stock 2022-08-22 4 M 0 1500 0.0 A 34355 I by Trust Common Stock 2022-08-22 4 M 0 1248 0.0 A 35603 I by Trust Common Stock 2022-08-22 4 M 0 1748 0.0 A 37351 I by Trust Common Stock 2022-08-22 4 M 0 2668 0.0 A 40019 I by Trust Common Stock 2022-08-22 4 M 0 1428 0.0 A 41447 I by Trust Common Stock 2022-08-22 4 M 0 678 0.0 A 42125 I by Trust Common Stock 2022-08-22 4 M 0 760 0.0 A 42885 I by Trust Common Stock 2022-08-22 4 F 0 6960 127.14 D 35925 I by Trust Common Stock 3244 D Common Stock 417308 I By Childrens' Trust Common Stock 261600 I By Foundation Common Stock 354000 I By GRAT JD Common Stock 354000 I By GRAT KD Restricted Stock Unit-10 0.0 2022-08-22 4 M 0 760 0.0 D Common Stock 760 4584 D Restricted Stock Unit-2 0.0 2022-08-22 4 M 0 4000 0.0 D Common Stock 4000 4000 D Restricted Stock Unit-3 0.0 2022-08-22 4 M 0 1500 0.0 D Common Stock 1500 3000 D Restricted Stock Unit-4 0.0 2022-08-22 4 M 0 1248 0.0 D Common Stock 1248 10000 D Restricted Stock Unit-5 0.0 2022-08-22 4 M 0 1748 0.0 D Common Stock 1748 14000 D Restricted Stock Unit-6 0.0 2022-08-22 4 M 0 2668 0.0 D Common Stock 2668 26648 D Restricted Stock Unit-7 0.0 2022-08-22 4 M 0 1428 0.0 D Common Stock 1428 18556 D Restricted Stock Unit-9 0.0 2022-08-22 4 M 0 678 0.0 D Common Stock 678 4089 D Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting. These shares are held by a family trust for which the reporting person is co-trustee. Represents shares withheld to satisfy tax withholding obligations on the vesting of restricted stock units. These shares are held in a trust for the benefit of a Child 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 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. This performance stock award was granted in the first quarter of 2021 and was earned based on attainment of certain performance conditions. The award vests 1/3 on February 22, 2022, and will continue to vest quarterly over 2 years. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year. Five percent (5%) of the restricted stock units awarded vested on February 20, 2018 and five percent (5%) of the award will continue to vest on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, or November 20 of each year. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on May 20, 2019 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, or November 20 of each year. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on November 20, 2020 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on November 20, 2020 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on May 20, 2021 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year. Six and one-quarter percent (6.25%) of the restricted stock units awarded will vest on February 20, 2022 and will continue to vest at the same rate on each quarterly vest date thereafter. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year. This performance stock award was granted in the first quarter of 2021 and was earned based on attainment of certain performance conditions. The award vests 1/3 on February 22, 2022, and will continue to vest quarterly over 2 years. A quarterly vest date is the first market trading day on or after February 20, May 20, August 20, and November 20 of each year. By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Kenneth Duda 2022-08-24