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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1596532	Arista Networks Inc.	ANET	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1244892	Ann Mather	5453 Great America Parkway Santa Clara CA 95054		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2018-02-20	833	$0.00	5,833	No	4	M	Direct
Common Stock	Disposition	2018-02-21	133	$241.39	5,700	No	4	S	Direct
Common Stock	Disposition	2018-02-21	100	$244.27	5,600	No	4	S	Direct
Common Stock	Disposition	2018-02-21	100	$247.57	5,500	No	4	S	Direct
Common Stock	Disposition	2018-02-21	100	$249.55	5,400	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Restricted Stock Unit-1	Disposition	2018-02-20	833	$0.00	833	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
4,167			No	4	M	Direct

Footnotes

Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 13, 2017.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $241.32 to $241.42, 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.
1/12th of the 10,000 restricted stock units awarded vested on August 20, 2016 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.