Arista Networks, Inc. — Director's Dealing 2021

May 14, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Arista Networks, Inc. (ANET)
CIK: 0001596532
Period of Report: 2021-05-12

Reporting Person: Duda Kenneth (CTO and SVP Software Eng.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-12	Common Stock	M	10000	$7.76	Acquired	10811	Direct
2021-05-12	Common Stock	S	1700	$315.4571	Disposed	9111	Direct
2021-05-12	Common Stock	S	3298	$316.303	Disposed	5813	Direct
2021-05-12	Common Stock	S	1005	$317.2438	Disposed	4808	Direct
2021-05-12	Common Stock	S	1397	$318.3459	Disposed	3411	Direct
2021-05-12	Common Stock	S	1300	$319.4737	Disposed	2111	Direct
2021-05-12	Common Stock	S	400	$320.4325	Disposed	1711	Direct
2021-05-12	Common Stock	S	700	$321.91	Disposed	1011	Direct
2021-05-12	Common Stock	S	200	$322.74	Disposed	811	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-12	Non-Qualified Stock Option (right to buy)	$7.76	M	10000	Disposed	2023-03-10	Common Stock (10000)	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: The exercise and/or sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 12, 2021.

F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $314.80 to $315.78, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of 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.

F3: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $315.82 to $316.81, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of 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.

F4: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $316.89 to $317.81, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number ofshares sold at each separate price within the range set forth in this footnote.

F5: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $317.93 to $318.85, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of 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.

F6: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $319.06 to $319.92, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of 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.

F7: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $320.15 to $320.99, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of 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.

F8: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $321.57 to $322.37, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of 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.

F9: 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.

F10: These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee.

F11: Reporting person's spouse is the trustee of the Jennifer Duda Annuity Trusts.

F12: Reporting person is the trustee of the Kenneth Duda Annuity Trusts.

F13: These shares are held by a family trust for which the reporting person is co-trustee.

F14: 1/4th of the 100,000 shares subject to the option vested and became exercisable on December 1, 2016 and 1/48th of the shares subject to the option vested each month thereafter.