FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Brennan Ita M
2. Issuer Name and Ticker or Trading Symbol

Arista Networks, Inc. [ ANET ]
5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Senior Vice President, CFO
(Last)          (First)          (Middle)

5453 GREAT AMERICA PARKWAY
3. Date of Earliest Transaction (MM/DD/YYYY)

5/20/2020
(Street)

SANTA CLARA, CA 95054
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 5/20/2020  M  3750 A$0.0 (1)14516 D  
Common Stock 5/20/2020  M  375 A$0.0 (1)14891 D  
Common Stock 5/20/2020  M  600 A$0.0 (1)15491 D  
Common Stock 5/20/2020  M  313 A$0.0 (1)15804 D  
Common Stock 5/20/2020  F(2)  2500 D$224.7 13304 D  

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
6. Date Exercisable and Expiration Date7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Unit-1 $0.0 (1)5/20/2020  M     3750   (3) (3)Common Stock 3750 $0.0 0 D  
Restricted Stock Unit-2 $0.0 (1)5/20/2020  M     375   (4) (4)Common Stock 375 $0.0 750 D  
Restricted Stock Unit-3 $0.0 (1)5/20/2020  M     600   (5) (5)Common Stock 600 $0.0 6000 D  
Restricted Stock Unit-4 $0.0 (1)5/20/2020  M     313   (6) (6)Common Stock 313 $0.0 3437 D  

Explanation of Responses:
(1) Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.
(2) Represents shares withheld to satisfy tax withholding obligations on the vesting of restricted stock units.
(3) Twenty percent (20%) of the 75,000 restricted stock units awarded vested on May 20, 2016 and will continue to vest at a rate of five percent (5%) each quarter 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.
(4) Six and one-quarter percent (6.25%) of the 6,000 restricted stock units awarded vested on February 20, 2017 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.
(5) Five percent (5%) of the 12,000 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.
(6) Six and one-quarter percent (6.25%) of the 5,000 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.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Brennan Ita M
5453 GREAT AMERICA PARKWAY
SANTA CLARA, CA 95054


Senior Vice President, CFO

Signatures
By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Ita Brennan5/22/2020
**Signature of Reporting PersonDate

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