Sec Form 4 Filing - Duda Kenneth @ Arista Networks, Inc. - 2023-09-13

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 Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Duda Kenneth 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) CTO and SVP Software Eng. (Last) (First) (Middle) 5453 GREAT AMERICA PARKWAY 3. Date of Earliest Transaction (MM/DD/YY) 09/13/2023 (Street) SANTA CLARA, CA95054 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction 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 09/13/2023 G( 1 ) 145,960 A $ 0 355,268 I By Childrens' Trust ( 2 ) Common Stock 09/13/2023 G( 3 ) 119,444 D $ 0 199,002 I By GRAT JD ( 4 ) Common Stock 09/13/2023 G( 5 ) 119,444 D $ 0 199,002 I By GRAT KD ( 6 ) Common Stock 09/13/2023 G( 7 ) 92,928 A $ 0 213,462 I by Trust ( 8 ) Common Stock 3,244 D Common Stock 216,100 I By Foundation ( 9 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Duda Kenneth 5453 GREAT AMERICA PARKWAY SANTA CLARA, CA95054 CTO and SVP Software Eng. Signatures By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Kenneth Duda 09/15/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents an aggregate of 145,960 shares contributed from the GRAT of the Reporting Person (72,980 shares), and GRAT of the Reporting Person's spouse (72,980 shares) to the Children's Trusts. ( 2 )These shares are held in a trust for the benefit of a Child of the reporting person for which the reporting person serves as co-trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares. ( 3 )Represents 119,444 shares contributed from the GRAT of the Reporting Persons spouse to the family Trust (46,464) and the childrens Trust (72,980). ( 4 )Reporting person's spouse is the trustee of the Jennifer Duda Annuity Trusts. ( 5 )Represents 119,444 shares contributed from the GRAT of the Reporting Person to the family Trust (46,464) and the childrens Trust (72,980). ( 6 )Reporting person is the trustee of the Kenneth Duda Annuity Trusts. ( 7 )Represents an aggregate of 92,928 shares transferred by GRAT of the Reporting Person (46,464 shares), and GRAT of the Reporting Person's spouse (42,464 shares) to the family Trust. ( 8 )These shares are held by a family trust for which the reporting person is co-trustee. ( 9 )These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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