Arista Networks CEO family trust sells 69,272 shares

The trust sales were made under Rule 10b5-1 plans entered into or adopted November 14, 2025, at prices ranging from $217.00 to $217.18 per share.

Rhea-AI Filing Summary

Three trusts associated with Arista Networks, Inc. (ANET) CEO and Chairperson Jayshree Ullal reported sales on October 7, 2026: 13,860 shares from each of two trusts benefiting her children and 69,272 shares from a family trust. Ullal serves as trustee for the child-benefit trusts and co-trustee of the family trust; she shares voting and investment control over the child-trust shares while disclaiming beneficial ownership of them.

The reported weighted average sale price was $217.1408 per share, with individual transaction prices ranging from $217.00 to $217.18. The sales were made pursuant to Rule 10b5-1 trading plans entered into or adopted on November 14, 2025. Reported post-sale holdings were 4,797,347 shares for each child-benefit trust and 15,545,738 shares for the family trust.

Insider Trade Summary 10b5-1

Net Seller: 96,992 shares

Net Sell 6 txns

Insider Ullal Jayshree

Role CEO and Chairperson

Sold 96,992 shs ($21.06M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2, F3	13,860	$217.1408	$3.01M
Sale	Common Stock F1, F2, F3	13,860	$217.1408	$3.01M
Sale	Common Stock F4, F2, F5	69,272	$217.1408	$15.04M
holding	Common Stock	--	--	--
holding	Common Stock F6	--	--	--
holding	Common Stock F6	--	--	--

Holdings After Transaction: Common Stock — 4,797,347 shares (Indirect, By Trust for Child 1); Common Stock — 4,797,347 shares (Indirect, By Trust for Child 2); Common Stock — 15,545,738 shares (Indirect, by Trust); Common Stock — 9,917 shares (Direct); Common Stock — 25,000 shares (Indirect, By Trust for Nephew); Common Stock — 25,000 shares (Indirect, By Trust for Niece)

Footnotes (6)

1. F1. The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person for the benefit of the reporting person's relatives on November 14, 2025.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $217.00 to $217.18, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
3. F3. These shares are held in trust for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.
4. F4. The exercises and/or sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 14, 2025.
5. F5. These shares are held by a family trust for which the reporting person is co-trustee.
6. F6. These shares are held in trust for the benefit of relatives 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.

Key Figures

Shares sold by each child-benefit trust: 13,860 shares Shares sold by family trust: 69,272 shares Weighted average sale price: $217.1408 per share +3 more

6 metrics

Shares sold by each child-benefit trust 13,860 shares October 7, 2026

Shares sold by family trust 69,272 shares October 7, 2026

Weighted average sale price $217.1408 per share Reported for the October 7, 2026 sales

Sale price range $217.00–$217.18 per share Prices across multiple transactions

Shares held by each child-benefit trust after transaction 4,797,347 shares Reported following the October 7, 2026 transaction

Shares held by family trust after transaction 15,545,738 shares Reported following the October 7, 2026 transaction

Key Terms

Rule 10b5-1 trading plan, weighted average price, beneficial ownership, voting and investment control

4 terms

Rule 10b5-1 trading plan regulatory

"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.

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

beneficial ownership regulatory

"disclaims beneficial ownership of the shares"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

voting and investment control regulatory

"shares voting and investment control over the shares"

FAQ

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

How many ANET shares did Jayshree Ullal's trusts sell and at what price?

Two trusts benefiting her children each sold 13,860 shares, and a family trust sold 69,272 shares on October 7, 2026. The reported weighted average price was $217.1408 per share; individual transaction prices ranged from $217.00 to $217.18, inclusive. The sales were made pursuant to Rule 10b5-1 trading plans entered into or adopted on November 14, 2025.

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

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 10/09/2026 - 07:14 PM Accepted by SEC EDGAR 10/09/2026 - 07:13 PM 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^*

Ullal Jayshree

(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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CEO and Chairperson

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/07/2026

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	10/07/2026		S(1)		13,860	D	$217.1408(2)	4,797,347	I	By Trust for Child 1(3)
Common Stock	10/07/2026		S(1)		13,860	D	$217.1408(2)	4,797,347	I	By Trust for Child 2(3)
Common Stock	10/07/2026		S(4)		69,272	D	$217.1408(2)	15,545,738	I	by Trust(5)
Common Stock								9,917	D
Common Stock								25,000	I	By Trust for Nephew(6)
Common Stock								25,000	I	By Trust for Niece(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

Explanation of Responses:

1. The sale of shares was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person for the benefit of the reporting person's relatives on November 14, 2025.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $217.00 to $217.18, inclusive. The reporting person undertakes to provide Arista Networks, Inc., any security holder of Arista Networks, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

3. These shares are held in trust for the benefit of the children of the reporting person for which the reporting person serves as trustee. The reporting person shares voting and investment control over the shares but disclaims beneficial ownership of the shares.

4. The exercises and/or sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 14, 2025.

5. These shares are held by a family trust for which the reporting person is co-trustee.

6. These shares are held in trust for the benefit of relatives 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.

	By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Jayshree Ullal	10/09/2026
	** 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)