[Form 4] Arista Networks Insider Trading Activity

Rhea-AI Filing Summary

Kenneth Duda, CTO and SVP Software Engineering and a director of Arista Networks (ANET), reported routine equity activity on Form 4. On 08/20/2025 several restricted stock units vested, resulting in acquisitions of 5,712, 3,884, 4,148 and 1,832 shares (each recorded as acquired at $0.0 per share because they represent vested RSUs). On the same date the filing shows 7,818 shares were disposed of at $132.78 per share to satisfy tax withholding obligations related to the vesting. The report also lists various indirect holdings by trusts and a foundation for which Mr. Duda serves as co-trustee or trustee, including holdings described as held in a child’s trust, a 501(c) foundation, and two GRAT/annuity trusts. The form was signed by an attorney-in-fact on behalf of Mr. Duda on 08/22/2025.

Positive

• RSU vesting: Acquisition of 5,712, 3,884, 4,148 and 1,832 shares via vested restricted stock units demonstrates continued compensation alignment with equity
• Transparent disclosure: Form 4 lists indirect holdings by trusts and foundation and explains tax-withholding treatment, providing clear reporting of beneficial ownership

Negative

• Share disposition: 7,818 shares were sold at $132.78 (reported as withheld for taxes), which reduces Mr. Duda's direct share count
• Concentration in related entities: Significant indirect holdings held in multiple trusts and a foundation could complicate exact beneficial ownership attribution (as disclosed)

Insights

Financial Analyst

TL;DR: Insider reported routine RSU vesting and a small disposition for tax withholding; not a material shift in ownership.

The filing documents scheduled vesting of multiple restricted stock unit awards and the related acquisition of common shares at $0.0 per share, which is standard for RSU vesting. A disposition of 7,818 shares at $132.78 is disclosed and is explicitly identified as withheld to satisfy tax obligations. The transactions appear administrative and consistent with compensation vesting schedules rather than open-market trading for strategic reallocation. Indirect holdings remain significant through family and charitable trusts, but the form does not show any large, discretionary sales or purchases beyond the withholding-related sale.

Corporate Governance Expert

TL;DR: The filing records standard insider compensation settlements and trustee-managed holdings, with no governance red flags disclosed.

Reported activity includes vested RSUs converting to common stock and a simultaneous disposition to cover tax withholding—common practice for executive equity awards. The report clearly states Mr. Duda's roles and his trustee/co-trustee relationships for several entities that hold shares, with disclaimers of beneficial ownership where applicable. There are no indications of unusual related-party transactions, accelerated transfers, or other governance concerns in the disclosed items.

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

OMB APPROVAL

OMB Number:			3235-0287
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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)
	CTO and SVP Software Eng.

3. Date of Earliest Transaction (Month/Day/Year)
08/20/2025

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	08/20/2025		M		5,712	A	$0.0(1)	31,327	I	by Trust
Common Stock	08/20/2025		M		3,884	A	$0.0(1)	35,211	I	by Trust
Common Stock	08/20/2025		M		4,148	A	$0.0(1)	39,359	I	by Trust
Common Stock	08/20/2025		M		1,832	A	$0.0(1)	41,191	I	by Trust
Common Stock	08/20/2025		F(2)		7,818	D	$132.78	33,373	I	by Trust
Common Stock								12,976	D
Common Stock								1,207,168	I	By Childrens' Trust(3)
Common Stock								572,400	I	By Foundation(4)
Common Stock								750,000	I	By GRAT JD(5)
Common Stock								750,000	I	By GRAT KD(6)

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)	08/20/2025		M			4,148	(7)	(7)	Common Stock	4,148	$0.0	37,328	D
Restricted Stock Unit-13	$0.0(1)	08/20/2025		M			1,832	(8)	(8)	Common Stock	1,832	$0.0	23,856	D
Restricted Stock Unit-7	$0.0(1)	08/20/2025		M			5,712	(9)	(9)	Common Stock	5,712	$0.0	5,712	D
Restricted Stock Unit-8	$0.0(1)	08/20/2025		M			3,884	(10)	(10)	Common Stock	3,884	$0.0	19,412	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. 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.

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

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

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

7. 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.

8. 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.

9. 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.

10. 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	08/22/2025
	** 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).
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FAQ

What transactions did Kenneth Duda report on ANET Form 4?

The filing shows RSU vesting on 08/20/2025 that resulted in acquisitions of 5,712, 3,884, 4,148 and 1,832 shares, and a disposition of 7,818 shares sold at $132.78 to satisfy tax withholding.

Were the acquired shares purchased with cash on ANET Form 4?

No. The acquisitions were from vested restricted stock units recorded at $0.0 per share, reflecting conversion of RSUs to common stock rather than a cash purchase.

Why were shares sold according to the Form 4?

The filing states shares were withheld/sold to satisfy tax withholding obligations related to RSU vesting.

Does the Form 4 show Mr. Duda reducing his overall ownership significantly?

The report lists a sale of 7,818 shares, but also records multiple RSU vesting events and substantial indirect holdings via trusts and a foundation; the filing does not show a material strategic divestiture.

What indirect holdings are disclosed by Kenneth Duda on the Form 4?

The filing discloses shares held in a child’s trust (co-trustee), a 501(c) foundation (co-trustee), and two annuity/GRAT trusts (one where he is trustee and one where spouse is trustee) as indirect holdings.