Arista CFO sells 612 shares under 10b5-1 plan

Arista Networks’ CFO reported a small 612-share sale under a pre-arranged Rule 10b5-1 trading plan.

Rhea-AI Filing Summary

Arista Networks, Inc. (ANET) reported that Senior Vice President and CFO Chantelle Yvette Breithaupt sold 612 shares of common stock on September 1, 2026 at $195.77 per share. After this sale, she held 69,921 shares directly. The transaction was effected under a Rule 10b5-1 trading plan entered into on December 11, 2025 and modified on June 2, 2026.

Insider Trade Summary 10b5-1

Net Seller: 612 shares

Net Sell 1 txn

Insider Breithaupt Chantelle Yvette

Role Senior Vice President, CFO

Sold 612 shs ($120K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	612	$195.77	$120K

Holdings After Transaction: Common Stock — 69,921 shares (Direct)

Footnotes (1)

1. F1. The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on December 11, 2025 and modified on June 2, 2026.

Key Figures

Shares sold: 612 shares Sale price per share: $195.77 per share Approximate transaction value: $119,811.24 +3 more

6 metrics

Shares sold 612 shares Common stock sale reported for September 1, 2026

Sale price per share $195.77 per share Price for the 612 ANET shares sold on September 1, 2026

Approximate transaction value $119,811.24 612 shares sold at $195.77 per share

Shares held after transaction 69,921 shares Direct ANET common stock holdings of the CFO after the sale

Rule 10b5-1 plan adoption date December 11, 2025 Date the CFO entered into the trading plan governing the sale

Rule 10b5-1 plan modification date June 2, 2026 Date the CFO’s Rule 10b5-1 trading plan was modified

Key Terms

Rule 10b5-1 trading plan, open market or private transaction, reporting person

3 terms

Rule 10b5-1 trading plan regulatory

"The sale of shares was effected pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

open market or private transaction market

"Sale in open market or private transaction"

reporting person regulatory

"entered into by the reporting person on December 11, 2025"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

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

Arista Networks disclosed that its CFO, Chantelle Yvette Breithaupt, sold 612 shares of common stock on September 1, 2026 at a price of $195.77 per share, in an open-market or private sale transaction.

How many Arista Networks (ANET) shares does the CFO hold after this transaction?

After the reported sale, CFO Chantelle Yvette Breithaupt held 69,921 shares of Arista Networks common stock directly, according to the Form 4 disclosure.

What was the approximate total value of the Arista Networks (ANET) shares sold?

The CFO’s sale of 612 shares at $195.77 per share represents an approximate transaction value of $119,811.24, based on the reported per-share price and share count.

Was the Arista Networks (ANET) insider sale made under a Rule 10b5-1 trading plan?

Yes. The filing states the sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the CFO on December 11, 2025 and modified on June 2, 2026.

Who is the reporting person in this Arista Networks (ANET) Form 4?

The reporting person is Chantelle Yvette Breithaupt, who serves as Senior Vice President and Chief Financial Officer of Arista Networks, Inc., as identified in the Form 4.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/03/2026 - 06:57 PM EDT Accepted by SEC EDGAR 09/03/2026 - 06:56 PM EDT Learn about SEC filing 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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

X

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 CALIFORNIA 95054

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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

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	09/01/2026		S(1)		612	D	$195.77	69,921	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

Explanation of Responses:

1. The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on December 11, 2025 and modified on June 2, 2026.

	By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Chantelle Breithaupt	09/03/2026
	** 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.
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.
* Form 4: SEC 1474 (03-26)