[Form 4] Arista Networks, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Arista Networks (ANET) director and officer Kenneth Duda reported multiple restricted stock unit (RSU) vestings on 11/20/2025. Several RSU grants converted into a total of 35,396 shares of common stock at an exercise price of $0.0, which were held indirectly through a family trust. To cover tax withholding on these vestings, 17,764 shares of common stock were disposed of at a price of $124.81 per share.

After these transactions, the family trust held 26,935 shares, in addition to other indirect holdings shown, including shares held in a children’s trust, a foundation, and two annuity trusts. Each RSU represents a contingent right to receive one share of Arista Networks common stock upon vesting, with the RSU awards vesting in quarterly installments tied to specific February, May, August, and November vest dates.

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 CA 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)
11/20/2025

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/20/2025		M		5,712	A	$0.0(1)	15,015	I	by Trust(2)
Common Stock	11/20/2025		M		3,884	A	$0.0(1)	18,899	I	by Trust(2)
Common Stock	11/20/2025		M		4,148	A	$0.0(1)	23,047	I	by Trust(2)
Common Stock	11/20/2025		M		1,836	A	$0.0(1)	24,883	I	by Trust(2)
Common Stock	11/20/2025		M		19,816	A	$0.0(1)	44,699	I	by Trust(2)
Common Stock	11/20/2025		F(3)		17,764	D	$124.81	26,935	I	by Trust(2)
Common Stock								12,976	D
Common Stock								1,159,168	I	By Childrens' Trust(4)
Common Stock								542,400	I	By Foundation(5)
Common Stock								762,035	I	By GRAT JD(6)
Common Stock								762,035	I	By GRAT KD(7)

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Unit-11	$0.0(1)	11/20/2025		M			4,148	(8)	(8)	Common Stock	4,148	$0.0	33,180	D
Restricted Stock Unit-13	$0.0(1)	11/20/2025		M			1,836	(9)	(9)	Common Stock	1,836	$0.0	22,020	D
Restricted Stock Unit-14	$0.0(1)	11/20/2025		M			19,816	(10)	(10)	Common Stock	19,816	$0.0	376,504	D
Restricted Stock Unit-7	$0.0(1)	11/20/2025		M			5,712	(11)	(11)	Common Stock	5,712	$0.0	0	D
Restricted Stock Unit-8	$0.0(1)	11/20/2025		M			3,884	(12)	(12)	Common Stock	3,884	$0.0	15,528	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. These shares are held by a family trust for which the reporting person is co-trustee.

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

4. 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.

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

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

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

8. Six and one-quarter percent (6.25%) of the restricted stock units awarded will vest 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.

9. Six and one-quarter percent (6.25%) of the restricted stock units awarded Will vest 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.

10. Six and one-quarter percent (6.25%) of the restricted stock 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.

11. Six and one-quarter percent (6.25%) of the restricted stock units awarded will vest on February 20, 2022 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.

12. Six and one-quarter percent (6.25%) of the restricted stock units awarded will vest 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	11/24/2025
	** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did ANET executive Kenneth Duda report?

Kenneth Duda reported the vesting of multiple restricted stock unit (RSU) awards on 11/20/2025, which converted into a total of 35,396 shares of Arista Networks common stock.

How many ANET shares were used to satisfy tax withholding in this Form 4?

The filing shows that 17,764 shares of Arista Networks common stock were disposed of at $124.81 per share to satisfy tax withholding obligations related to the RSU vesting.

How are the newly vested ANET shares held after the transaction?

The newly acquired shares from RSU vesting are reported as held indirectly by a family trust for which Kenneth Duda is co-trustee. Following the reported transactions, this trust held 26,935 shares of Arista Networks common stock.

What other indirect ANET shareholdings are disclosed for Kenneth Duda?

The report lists additional indirect holdings, including 12,976 shares directly, 1,159,168 shares held by a children’s trust, 542,400 shares held by a 501(c) foundation, and 762,035 shares in each of two annuity trusts identified as GRAT JD and GRAT KD.

How do Kenneth Duda’s ANET RSUs vest over time?

The explanations state that 6.25% of each RSU award vests on an initial February 20 vest date (for example, February 20, 2024 or 2025) and then continues to vest at the same rate on quarterly vest dates, which are the first market trading day on or after February 20, May 20, August 20, and November 20 each year.

What roles does Kenneth Duda hold at Arista Networks (ANET)?

In this report, Kenneth Duda is identified as both a Director and an Officer of Arista Networks, serving in the role of President and CTO.