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

Rhea-AI Filing Summary

Arista Networks, Inc. (ANET) reported an insider equity transaction by its Senior Vice President and Chief Financial Officer, Chantelle Breithaupt. On 11/20/2025, 10,916 shares of common stock were acquired at an exercise price of $0.0 through the vesting and settlement of previously granted restricted stock units. On the same date, 5,457 shares of common stock were disposed of at $124.81, designated with transaction code "F," which typically reflects shares withheld to cover tax obligations.

Following these transactions, the reporting person beneficially owned 47,395 shares of Arista Networks common stock directly and held 98,260 derivative securities in the form of restricted stock units. The underlying RSU award began vesting on February 20, 2025, with 25% vested on that date and the remainder scheduled to vest in 6.25% quarterly installments on the first market trading day on or after February 20, May 20, August 20, and November 20 of each year.

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

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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^*

Breithaupt Chantelle Yvette

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Senior Vice President, CFO

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		10,916	A	$0.0(1)	52,852	D
Common Stock	11/20/2025		F		5,457	D	$124.81(1)	47,395	D

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-1	$0.0(1)	11/20/2025		M			10,916	(2)	(2)	Common Stock	10,916	$0.0	98,260	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. Twenty five percent (25%) of the restricted stock units awarded vested on Feb 20, 2025 and will continue to vest at a rate of six and one-quarter percent (6.25%) each quarter 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 or November 20 of each year.

	By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Chantelle Breithaupt	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.
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FAQ

What insider transaction did Arista Networks (ANET) disclose in this Form 4?

The filing reports that Senior Vice President and CFO Chantelle Breithaupt acquired 10,916 shares of Arista Networks common stock on 11/20/2025 through the vesting and settlement of restricted stock units at an exercise price of $0.0, and disposed of 5,457 shares on the same date at a price of $124.81.

How many Arista Networks (ANET) shares does the reporting person own after the transaction?

After the reported transactions, the reporting person beneficially owned 47,395 shares of Arista Networks common stock directly and held 98,260 restricted stock units as derivative securities.

What do the transaction codes M and F mean in this Arista Networks (ANET) Form 4?

In this filing, code "M" is used for the acquisition of 10,916 shares upon settlement of restricted stock units at $0.0, while code "F" applies to the disposition of 5,457 shares at $124.81, which is noted in the context of the RSU vesting described in the explanations.

How is the restricted stock unit (RSU) award for Arista Networks (ANET) structured for this insider?

Each restricted stock unit represents a contingent right to receive one share of Arista Networks common stock upon vesting. 25% of the units vested on February 20, 2025, and the remaining units vest at 6.25% each quarter on the first market trading day on or after February 20, May 20, August 20, or November 20 of each year.

What is the role of the reporting person in Arista Networks (ANET)?

The reporting person is identified as an Officer of Arista Networks, serving as Senior Vice President, CFO, and filed this Form 4 as a single reporting person.

Are the Arista Networks (ANET) restricted stock units reported as derivative securities?

Yes. The filing lists a derivative security titled Restricted Stock Unit-1 with an exercise price of $0.0, underlying 10,916 shares of Arista Networks common stock involved in the reported transaction and 98,260 derivative securities beneficially owned after the transaction.