Arista Networks (NYSE: ANET) director discloses insider stock sales via 10b5-1 plan

Rhea-AI Filing Summary

Arista Networks, Inc. director reported several open-market sales of the company’s common stock on 12/01/2025, executed under a pre-arranged Rule 10b5-1 trading plan entered into on June 12, 2025. A family trust for which the reporting person is co-trustee sold 564 shares at a weighted average price of $126.928, 4,552 shares at $127.9277, and 2,884 shares at $128.5834, with each price reflecting multiple trades within specified ranges. Following these transactions, the trust held 25,784 shares indirectly, and the reporting person also held 221,578 shares directly. The filing emphasizes that detailed price breakdowns within each range are available to Arista Networks, its security holders, or the SEC staff upon request.

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

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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).

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^*

Giancarlo Charles H

(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
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/01/2025

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	12/01/2025		S(1)		564	D	$126.928(2)	33,220	I	by Trust(3)
Common Stock	12/01/2025		S(1)		4,552	D	$127.9277(4)	28,668	I	by Trust(3)
Common Stock	12/01/2025		S(1)		2,884	D	$128.5834(5)	25,784	I	by Trust(3)
Common Stock								221,578	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. This sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 12, 2025.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $126.35 to $127.33, 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 by a family trust for which the reporting person is co-trustee.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $127.35 to $128.3479, 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 price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $128.35 to $128.98, 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.

	By: Isabelle Bertin-Bailly, Attorney-in-Fact For: Charles Giancarlo	12/03/2025
	** Signature of Reporting Person	Date
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FAQ

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

The filing reports that a director of Arista Networks, Inc. sold common stock in three open-market transactions on 12/01/2025 through a family trust for which the director is co-trustee.

How many Arista Networks (ANET) shares were sold in each transaction?

The family trust sold 564 shares, 4,552 shares, and 2,884 shares of Arista Networks common stock in separate transactions reported for 12/01/2025.

What prices were received for the Arista Networks (ANET) stock sales?

The weighted average prices were $126.928 for 564 shares, $127.9277 for 4,552 shares, and $128.5834 for 2,884 shares, each based on multiple trades within specified price ranges.

Were the Arista Networks (ANET) insider sales made under a Rule 10b5-1 plan?

Yes. The filing states that the sale was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on June 12, 2025.

How many Arista Networks (ANET) shares does the insider report owning after the transactions?

After the reported sales, the family trust held 25,784 shares indirectly, and the reporting person also held 221,578 shares directly of Arista Networks common stock.

What is the relationship of the reporting person to Arista Networks (ANET)?

The reporting person is a director of Arista Networks, Inc., and some shares are held through a family trust for which the reporting person is co-trustee.

Can investors obtain detailed price information for each Arista Networks (ANET) trade?

Yes. The filing notes that the reporting person will provide Arista Networks, any of its security holders, or SEC staff with full information on the number of shares sold at each separate price within the reported ranges upon request.