SEC FORM 4

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SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Duda Kenneth

(Last)

(First)

(Middle)

5453 GREAT AMERICA PARKWAY

(Street)

SANTA CLARA

95054

(City)

(State)

(Zip)

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
X	Officer (give title below)	Other (specify below)
	President and CTO

3. Date of Earliest Transaction (Month/Day/Year)
08/20/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

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. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	08/20/2026		M⁽¹⁾		13,334	A	$15.2769	26,310	D
Common Stock	08/20/2026		M⁽¹⁾		3,999	A	$14.1463	30,309	D
Common Stock	08/20/2026		S⁽¹⁾		4,197	D	$184.3297⁽²⁾	26,112	D
Common Stock	08/20/2026		S⁽¹⁾		5,750	D	$185.1821⁽³⁾	20,362	D
Common Stock	08/20/2026		S⁽¹⁾		6,568	D	$186.1257⁽⁴⁾	13,794	D
Common Stock	08/20/2026		S⁽¹⁾		818	D	$186.9698⁽⁵⁾	12,976	D
Common Stock	08/20/2026		S⁽⁶⁾		3,875	D	$184.3297⁽²⁾	1,027,293	I	By Childrens' Trust⁽⁷⁾
Common Stock	08/20/2026		S⁽⁶⁾		5,308	D	$185.1821⁽³⁾	1,021,985	I	By Childrens' Trust⁽⁷⁾
Common Stock	08/20/2026		S⁽⁶⁾		6,063	D	$186.1257⁽⁴⁾	1,015,922	I	By Childrens' Trust⁽⁷⁾
Common Stock	08/20/2026		S⁽⁶⁾		754	D	$186.9698⁽⁵⁾	1,015,168	I	By Childrens' Trust⁽⁷⁾
Common Stock	08/20/2026		S⁽⁸⁾		2,422	D	$184.3297⁽²⁾	459,978	I	By Foundation⁽⁹⁾
Common Stock	08/20/2026		S⁽⁸⁾		3,317	D	$185.1821⁽³⁾	456,661	I	By Foundation⁽⁹⁾
Common Stock	08/20/2026		S⁽⁸⁾		3,789	D	$186.1257⁽⁴⁾	452,872	I	By Foundation⁽⁹⁾
Common Stock	08/20/2026		S⁽⁸⁾		472	D	$186.9698⁽⁵⁾	452,400	I	By Foundation⁽⁹⁾
Common Stock	08/20/2026		M		3,880	A	$0.0⁽¹⁰⁾	110,770	I	by Trust⁽¹¹⁾
Common Stock	08/20/2026		M		4,148	A	$0.0⁽¹⁰⁾	114,918	I	by Trust⁽¹¹⁾
Common Stock	08/20/2026		M		1,832	A	$0.0⁽¹⁰⁾	116,750	I	by Trust⁽¹¹⁾
Common Stock	08/20/2026		M		19,816	A	$0.0⁽¹⁰⁾	136,566	I	by Trust⁽¹¹⁾
Common Stock	08/20/2026		M		1,350	A	$0.0⁽¹⁰⁾	137,916	I	by Trust⁽¹¹⁾
Common Stock	08/20/2026		F⁽¹²⁾		15,541	D	$186.45	122,375	I	by Trust⁽¹¹⁾
Common Stock								757,755	I	By GRAT JD⁽¹³⁾
Common Stock								756,272	I	By GRAT KD⁽¹⁴⁾

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Non-Qualified Stock Option (right to buy)	$14.1463	08/20/2026		M⁽¹⁾			3,999	⁽¹⁵⁾	02/07/2029	Common Stock	3,999	$0.0	156,001	D
Non-Qualified Stock Option (right to buy)	$15.2769	08/20/2026		M⁽¹⁾			13,334	⁽¹⁶⁾	11/08/2028	Common Stock	13,334	$0.0	0	D
Restricted Stock Unit - 17	$0.0⁽¹⁰⁾	08/20/2026		M			1,350	⁽¹⁷⁾	⁽¹⁷⁾	Common Stock	1,350	$0.0	17,550	D
Restricted Stock Unit-11	$0.0⁽¹⁰⁾	08/20/2026		M			4,148	⁽¹⁸⁾	⁽¹⁸⁾	Common Stock	4,148	$0.0	20,736	D
Restricted Stock Unit-11	$0.0⁽¹⁰⁾	08/20/2026		M			4,148	⁽¹⁸⁾	⁽¹⁸⁾	Common Stock	4,148	$0.0	16,588	D
Restricted Stock Unit-13	$0.0⁽¹⁰⁾	08/20/2026		M			1,832	⁽¹⁹⁾	⁽¹⁹⁾	Common Stock	1,832	$0.0	16,516	D
Restricted Stock Unit-14	$0.0⁽¹⁰⁾	08/20/2026		M			19,816	⁽²⁰⁾	⁽²⁰⁾	Common Stock	19,816	$0.0	317,056	D
Restricted Stock Unit-8	$0.0⁽¹⁰⁾	08/20/2026		M			3,880	⁽²¹⁾	⁽²¹⁾	Common Stock	3,880	$0.0	3,884	D

Explanation of Responses:

1. The exercise and/or sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on March 11, 2026.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $183.72 to $184.7176, 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 $184.72 to $185.719, 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 $185.7311 to $186.7213, 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 $186.7331 to $187.16, 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 sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person for the benefit of the reporting person's children on March 11, 2026.

7. 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.

8. The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2026 by the reporting person's 501(c) Foundation, for which the reporting person and his spouse serve as co-trustee.

9. These shares are held by a 501(c) Foundation for which the reporting person and his spouse serve as co-trustee.

10. Each restricted stock unit represents a contingent right to receive one share of Arista Networks, Inc. Common Stock upon vesting.

11. These shares are held by a family trust for which the reporting person is co-trustee.

12. Represents shares withheld to satisfy tax withholding obligations on the vesting of restricted stock units.

13. Reporting person's spouse is the trustee of the Jennifer Duda Annuity Trusts.

14. Reporting person is the trustee of the Kenneth Duda Annuity Trusts.

15. 1/48th of the shares subject to the option shall vest and become exercisable on December 1, 2020 and 1/48th of the shares subject to the option shall continue to vest each month thereafter.

16. 1/48th of the shares subject to the option shall vest and become exercisable on December 1, 2020 and 1/48th of the shares subject to the option shall continue to vest each month thereafter.

17. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2026 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, and November 20 of each year.

18. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on on February 20, 2024 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, and November 20 of each year.

19. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2025 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, and November 20 of each year.

20. Five percent (5%) of the restricted stock awarded vested on November 20, 2025 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, and November 20 of each year.

21. Six and one-quarter percent (6.25%) of the restricted stock units awarded vested on February 20, 2023 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, and November 20 of each year.

	By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Kenneth Duda	08/24/2026
	** Signature of Reporting Person	Date
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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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