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 * Theodosopoulos Nikos 2. Issuer Name and Ticker or Trading Symbol Arista Networks, Inc. [ ANET ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable)__X__ Director                    _____ 10% Owner
_____ Officer (give title below)    _____ Other (specify below)
(Last)         (First)         (Middle)
5453 GREAT AMERICA PARKWAY
3. Date of Earliest Transaction (MM/DD/YYYY)
9/1/2020
(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  9/1/2020    M(1)    9375  A $34.12  13887  D   
Common Stock  9/1/2020    S(1)    2600  D $221.2996 (2) 11287  D   
Common Stock  9/1/2020    S(1)    1082  D $222.4335 (3) 10205  D   
Common Stock  9/1/2020    S(1)    5152  D $223.1332 (4) 5053  D   
Common Stock  9/1/2020    S(1)    541  D $224.0328 (5) 4512  D   
Common Stock  9/2/2020    M(1)    3000  A $34.12  7512  D   
Common Stock  9/2/2020    S(1)    3000  D $225.3072 (6) 4512  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 Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. 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 Date 7. 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)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Option (right to buy)  $34.12  9/1/2020    M (1)       9375    (7) 3/27/2024  Common Stock  9375  $0.0  9375  D   
Non-Qualified Stock Option (right to buy)  $34.12  9/2/2020    M (1)       3000    (7) 3/27/2024  Common Stock  3000  $0.0  6375  D   

Explanation of Responses:
(1)  The exercise and sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2020.
(2)  The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 220.67 to 221.61, 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.
(3)  The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 221.80 to 222.78, 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.
(4)  The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 222.80 to 223.75, 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.
(5)  The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 223.84 to 224.39, 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.
(6)  The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 225.00 to 225.89, 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.
(7)  1/60th of the 25,000 shares subject to the option vest monthly from Vest Base Date over five years.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Theodosopoulos Nikos
5453 GREAT AMERICA PARKWAY
SANTA CLARA, CA 95054
X



Signatures
By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Nikos Theodosopoulos 9/3/2020
**Signature of Reporting Person Date