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: Duda Kenneth (CTO and SVP Software Eng.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-20	Common Stock	M	1000	$0.0	Acquired	1811	Direct
2021-05-20	Common Stock	M	375	$0.0	Acquired	2186	Direct
2021-05-20	Common Stock	M	313	$0.0	Acquired	2499	Direct
2021-05-20	Common Stock	M	438	$0.0	Acquired	2937	Direct
2021-05-20	Common Stock	M	666	$0.0	Acquired	3603	Direct
2021-05-20	Common Stock	F	1387	$335.93	Disposed	2216	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-20	Restricted Stock Unit-2	$0.0	M	1000	Disposed		Common Stock (1000)	Direct
2021-05-20	Restricted Stock Unit-3	$0.0	M	375	Disposed		Common Stock (375)	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	438	Disposed		Common Stock (438)	Direct
2021-05-20	Restricted Stock Unit-6	$0.0	M	666	Disposed		Common Stock (666)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	37640	Indirect
Common Stock	29900	Indirect
Common Stock	123825	Indirect
Common Stock	123825	Indirect
Common Stock	126265	Indirect

Footnotes

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

F2: Represents shares withheld to satisfy tax withholding obligations on the vesting of restricted stock units.

F3: These shares are held in a trust for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

F4: These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee.

F5: Reporting person's spouse is the trustee of the Jennifer Duda Annuity Trusts.

F6: Reporting person is the trustee of the Kenneth Duda Annuity Trusts.

F7: These shares are held by a family trust for which the reporting person is co-trustee.

F8: Five percent (5%) of the 20,000 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.

F9: Six and one-quarter percent (6.25%) of the 6,000 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.

F10: 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.

F11: Six and one-quarter percent (6.25%) of the 7,000 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.

F12: Six and one-quarter percent (6.25%) of the 10,660 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.