[Form 4] Arista Networks Insider Trading Activity

Rhea-AI Filing Summary

Jayshree Ullal, CEO and Chairperson of Arista Networks (ANET), reported multiple sales of Arista common stock on 09/08/2025 executed under pre-established Rule 10b5-1 trading plans. The Form 4 shows discrete dispositions tied to trusts for family members and family trusts for which Ms. Ullal is trustee or co-trustee. Reported weighted-average prices for the sales ranged from $143.00 to $144.10 per share; the filing notes sales occurred in multiple transactions within those price ranges. After the reported transactions, the filing lists various beneficial ownership totals by trust, including positions of 5,556,153; 5,555,373; and 20,154,457 shares, and additional smaller trust holdings. The report was submitted by an attorney-in-fact on behalf of Ms. Ullal.

Insights

Financial Analyst

TL;DR: Routine insider sales under a 10b5-1 plan reduce insider-held shares but reflect pre-planned liquidity, not necessarily a view on company fundamentals.

The Form 4 documents multiple share disposals by Jayshree Ullal on 09/08/2025 under Rule 10b5-1 plans adopted December 13, 2024. Reported weighted-average sale prices range from $143.00 to $144.10. The filing distinguishes holdings held in several family and co-trust structures and disclaims direct beneficial ownership for certain trust-held shares. From a market-impact perspective, the filing provides transparency on the mechanics and prices of the trades but does not supply operational or forward-looking company data.

Corporate Governance Expert

TL;DR: The filing demonstrates adherence to compliance practices with explicit 10b5-1 plan disclosure and trust ownership clarity.

The disclosure identifies the trades as governed by 10b5-1 plans and provides weighted-average price ranges plus commitments to furnish detailed per-price execution data on request. It clarifies the reporter's roles as trustee or co-trustee and includes disclaimers of beneficial ownership where applicable. This level of specificity supports governance transparency around insider transactions and related-party holdings.

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 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)
	CEO and Chairperson

3. Date of Earliest Transaction (Month/Day/Year)
09/08/2025

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	09/08/2025		S(1)		7,023	D	$143.5038(2)	5,556,153	I	By Trust for Child 1(3)
Common Stock	09/08/2025		S(1)		780	D	$144.0421(4)	5,555,373	I	By Trust for Child 1(3)
Common Stock	09/08/2025		S(1)		7,023	D	$143.5038(2)	5,556,153	I	By Trust for Child 2(3)
Common Stock	09/08/2025		S(1)		780	D	$144.0421(4)	5,555,373	I	By Trust for Child 2(3)
Common Stock	09/08/2025		S(5)		36,851	D	$143.5038(2)	20,154,457	I	by Trust(6)
Common Stock	09/08/2025		S(5)		4,091	D	$144.0421(4)	20,150,366	I	by Trust(6)
Common Stock								9,917	D
Common Stock								30,000	I	By Trust for Nephew(7)
Common Stock								30,000	I	By Trust for Niece(7)

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 December 13, 2024.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $143.00 to $143.99, 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 price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $144.00 to $144.10, 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.

5. 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 December 13, 2024.

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

7. 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	09/10/2025
	** 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.
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.

FAQ

What did Jayshree Ullal report in the Form 4 for ANET?

The filing reports multiple sales of Arista common stock on 09/08/2025 executed under Rule 10b5-1 trading plans with weighted-average prices between $143.00 and $144.10.

Were the transactions part of a pre-established trading plan?

Yes. The sales and exercises were effected pursuant to Rule 10b5-1 trading plans adopted on December 13, 2024.

How are the remaining shares held according to the Form 4?

The filing lists multiple trust-held positions after the transactions, including reported totals of 5,556,153, 5,555,373, and 20,154,457 shares among various trusts.

Does the reporting person claim direct beneficial ownership of the trust shares?

For certain trusts the reporting person disclaims beneficial ownership, while for others she serves as trustee or co-trustee and shares voting and investment control but disclaims beneficial ownership.

Who filed the Form 4 on behalf of Jayshree Ullal?

The Form 4 was submitted By: Isabelle Bertin-Bailly, Attorney-in-Fact for Jayshree Ullal on 09/10/2025.