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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1596532	Arista Networks Inc.	ANET	Computer Communications Equipment (3576)	201751121

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1701967	F John Mccool	5453 Great America Parkway Santa Clara CA 95054	Chief Platform Officer	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2019-05-20	2,250	$0.00	2,354	No	4	M	Indirect	by Trust
Common Stock	Acquisiton	2019-05-20	250	$0.00	2,604	No	4	M	Indirect	by Trust
Common Stock	Disposition	2019-05-20	1,189	$244.95	1,415	No	4	F	Indirect	by Trust
Common Stock	Disposition	2019-05-21	574	$253.19	841	No	4	S	Indirect	by Trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Indirect	by Trust
No	4	M	Indirect	by Trust
No	4	F	Indirect	by Trust
No	4	S	Indirect	by Trust

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Restricted Stock Unit-1	Disposition	2019-05-20	2,250	$0.00	2,250	$0.00
Common Stock	Restricted Stock Unit-2	Disposition	2019-05-20	250	$0.00	250	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
27,000			No	4	M	Direct
3,750			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.
These shares are held by a family trust for which the reporting person is a co-trustee.
Represents shares withheld to satisfy tax withholding obligations on the vesting of restricted stock units.
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 March 14, 2018.
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.
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.