Arista Networks (NYSE: ANET) CFO trades shares in pre-planned 10b5-1 sale

Rhea-AI Filing Summary

Arista Networks, Inc. Senior Vice President and CFO Chantelle Yvette Breithaupt sold 2,448 shares of Common Stock in an open-market transaction at $157 per share. The sale was executed under a pre-arranged Rule 10b5-1 trading plan entered into on December 11, 2025. Following this trade, she holds 64,408 shares directly, indicating the transaction represents a relatively small portion of her overall position.

Insider Trade Summary 10b5-1

Net Seller: 2,448 shares ($384,336)

Net Sell 1 txn

Insider Breithaupt Chantelle Yvette

Role Senior Vice President, CFO

Sold 2,448 shs ($384K)

Type	Security	Shares	Price	Value
Sale	Common Stock	2,448	$157.00	$384K

Holdings After Transaction: Common Stock — 64,408 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 2,448 shares Sale price per share: $157.00 per share Shares owned after sale: 64,408 shares +2 more

5 metrics

Shares sold 2,448 shares Open-market sale of Common Stock

Sale price per share $157.00 per share Price for the 2,448 shares sold

Shares owned after sale 64,408 shares Direct holdings following the transaction

Transaction date May 26, 2026 Date of the open-market sale

Transaction code S Sale in open market or private transaction

Key Terms

Rule 10b5-1 trading plan, open-market sale, Common Stock, transaction code "S"

4 terms

Rule 10b5-1 trading plan regulatory

"The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person"

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 sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

""security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

transaction code "S" regulatory

""transaction_code": "S""

Form 4 Insider Transactions: What Each Field Means →

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)
05/26/2026

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	05/26/2026		S(1)		2,448	D	$157	64,408	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.

	By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Chantelle Breithaupt	05/28/2026
	** 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)

FAQ

What did Arista Networks (ANET) CFO Chantelle Breithaupt report in this Form 4?

Arista Networks CFO Chantelle Yvette Breithaupt reported an open-market sale of 2,448 shares of Common Stock at $157 per share. After the transaction, she directly holds 64,408 shares, showing this was a relatively small portion of her total ownership.

How many Arista Networks (ANET) shares did the CFO sell and at what price?

The CFO sold 2,448 Arista Networks Common Stock shares at $157 per share in an open-market transaction. This sale was recorded as a single trade and left her with 64,408 shares directly owned afterward.

How many Arista Networks (ANET) shares does the CFO still own after this sale?

After the reported sale, the CFO directly owns 64,408 Arista Networks Common Stock shares. This remaining balance suggests the 2,448 shares sold represent a modest fraction of her overall share position disclosed in this filing.

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

Yes. The filing notes the sale was effected under a Rule 10b5-1 trading plan entered into on December 11, 2025. Such plans pre-schedule trades, reducing the significance of trade timing for interpreting insider sentiment.

What type of transaction did the Arista Networks (ANET) CFO execute?

The CFO executed an open-market sale of Common Stock, classified with transaction code “S.” This code indicates a sale in the open market or a private transaction, rather than an option exercise, gift, or tax-withholding event.