Arista Networks, Inc. — Director's Dealing 2021

May 24, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Arista Networks, Inc. (ANET)
CIK: 0001596532
Period of Report: 2021-05-20

Reporting Person: McCool John F (Chief Platform Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-20	Common Stock	M	2250	$0.0	Acquired	2332	Indirect
2021-05-20	Common Stock	M	250	$0.0	Acquired	2582	Indirect
2021-05-20	Common Stock	M	188	$0.0	Acquired	2770	Indirect
2021-05-20	Common Stock	M	313	$0.0	Acquired	3083	Indirect
2021-05-20	Common Stock	M	364	$0.0	Acquired	3447	Indirect
2021-05-20	Common Stock	M	84	$132.75	Acquired	3531	Indirect
2021-05-20	Common Stock	F	1671	$335.93	Disposed	1860	Indirect
2021-05-20	Common Stock	S	84	$324.48	Disposed	1776	Indirect
2021-05-21	Common Stock	S	1511	$332.81	Disposed	265	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-20	Non-Qualified Stock Option (right to buy)	$132.75	M	84	Disposed	2027-04-16	Common Stock (84)	Direct
2021-05-20	Restricted Stock Unit-1	$0.0	M	2250	Disposed		Common Stock (2250)	Direct
2021-05-20	Restricted Stock Unit-2	$0.0	M	250	Disposed		Common Stock (250)	Direct
2021-05-20	Restricted Stock Unit-3	$0.0	M	188	Disposed		Common Stock (188)	Direct
2021-05-20	Restricted Stock Unit-4	$0.0	M	313	Disposed		Common Stock (313)	Direct
2021-05-20	Restricted Stock Unit-5	$0.0	M	364	Disposed		Common Stock (364)	Direct

Footnotes

F1: Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

F2: These shares are held by a family trust for which the reporting person is co-trustee.

F3: The exercise and/or sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2020.

F4: Represents shares withheld to satisfy tax withholding obligations on the vesting of restricted stock units.

F5: 1/5th of the 5,000 shares subject to the option vested and became exercisable on March 20, 2018 and 1/60th of the shares subject to the option shall vest each month thereafter.

F6: 1/5th of the 45,000 restricted stock unit award vested on May 20, 2018 and 1/20th of the award will 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 and November 20 of each year.

F7: Six and one-quarter percent (6.25%) of the 4,000 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.

F8: Six and one-quarter percent (6.25%) of the 3,000 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.

F9: Six and one-quarter percent (6.25%) of the 5,000 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.

F10: Six and one-quarter percent (6.25%) of the 5,820 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.