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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	2020-12-23	136	$8.77	722	No	4	M	Direct
Common Stock	Acquisiton	2020-12-23	864	$30.67	1,586	No	4	M	Direct
Common Stock	Disposition	2020-12-23	1,000	$290.11	586	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2020-12-23	136	$0.00	136	$8.77
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2020-12-23	864	$0.00	864	$30.67

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0		2023-06-06	No	4	M	Direct
12,844		2024-02-10	No	4	M	Direct

Footnotes

The exercises and/or sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 14, 2020.
1/5th of the shares subject to the option shall vest and become exercisable on the Date Exercisable set forth above and 1/60th of the shares subject to the option shall vest monthly thereafter. Since the date of the reporting person's last ownership report, she has transferred options to purchase 21,156 shares of Arista common stock to her ex-husband pursuant to a domestic relations order. The reporting person disclaims beneficial ownership in all such transferred stock option interests and no longer reports them as beneficially owned.
1/4th of the shares subject to the option shall vest and become exercisable on the Date Exercisable set forth above and 1/48th of the shares subject to the option shall vest monthly thereafter. Since the date of the reporting person's last ownership report, she has transferred options to purchase 21,156 shares of Arista common stock to her ex-husband pursuant to a domestic relations order. The reporting person disclaims beneficial ownership in all such transferred stock option interests and no longer reports them as beneficially owned.