Arista Networks' Ullal proposes $13.2M share sale

Five prior sale transactions are listed from July 9 through August 25, 2026, including 1,099,495 shares on August 5.

Rhea-AI Filing Summary

Jayshree Ullal, identified as an officer and director of Arista Networks, Inc. (ANET), reported a proposed sale of 62,622 common shares, with an aggregate market value of $13,238,021.53 and an approximate sale date of September 25, 2026. Fidelity Brokerage Services LLC is listed as the broker and NYSE as the exchange. The shares are identified as acquired from the issuer through a stock option exercise on September 22, 2008. Prior sales include 1,099,495 shares on August 5, 2026, for $221,239,724.20.

Key Figures

Proposed sale: 62,622 shares Aggregate market value: $13,238,021.53 Shares outstanding: 1,261,224,648 shares +2 more

5 metrics

Proposed sale 62,622 shares Approximate sale date September 25, 2026

Aggregate market value $13,238,021.53 Proposed sale

Shares outstanding 1,261,224,648 shares Count shown in the securities information

Prior sale 1,099,495 shares August 5, 2026

Prior sale value $221,239,724.20 August 5, 2026

Key Terms

Rule 144, Stock Option Exercise, attorney-in-fact

3 terms

Rule 144 regulatory

"definition of "person" in paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Stock Option Exercise financial

"Nature of acquisition: Stock Option Exercise"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

attorney-in-fact regulatory

"as attorney-in-fact for Jayshree Ullal"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

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

How many ANET shares is Jayshree Ullal proposing to sell?

Jayshree Ullal is listed for a proposed sale of 62,622 common shares, with an aggregate market value of $13,238,021.53 and an approximate sale date of September 25, 2026.

What prior sales are listed for Jayshree Ullal and ANET?

The prior-sales list includes 242,422 shares for $45,616,262.39 on July 9, 2026; 234,578 for $43,907,277.00 on July 10; 1,099,495 for $221,239,724.20 on August 5; 573,509 for $119,364,084.06 on August 12; and 13,809 for $2,648,491.63 on August 25.

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

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Available on EDGAR 09/25/2026 - 04:19 PM Accepted by SEC EDGAR 09/25/2026 - 04:07 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001605809
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Arista Networks, Inc.
SEC File Number	001-36468
Address of Issuer	5453 GREAT AMERICA PARKWAY SANTA CLARA CALIFORNIA 95054
Phone	408-547-5500
Name of Person for Whose Account the Securities are To Be Sold	Ullal Jayshree
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	Fidelity Brokerage Services LLC 245 Summer Street Boston MA 02110	62622	13238021.53	1261224648	09/25/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	09/22/2008	Stock Option Exercise	Issuer			62622	09/22/2008	Wire

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Jayshree Ullal C/O Arista Networks, Inc. 5453 GREAT AMERICA PARKWAY Santa Clara CA 95054	Common Stock	07/09/2026	242422	45616262.39
Jayshree Ullal C/O Arista Networks, Inc. 5453 GREAT AMERICA PARKWAY, Santa Clara CA 95054	Common Stock	07/10/2026	234578	43907277.00
Jayshree Ullal C/O Arista Networks, Inc. 5453 GREAT AMERICA PARKWAY Santa Clara CA 95054	Common Stock	08/05/2026	1099495	221239724.20
Jayshree Ullal C/O Arista Networks, Inc. 5453 GREAT AMERICA PARKWAY, Santa Clara CA 95054	Common Stock	08/12/2026	573509	119364084.06
Jayshree Ullal C/O Arista Networks, Inc. 5453 GREAT AMERICA PARKWAY Santa Clara CA 95054	Common Stock	08/25/2026	13809	2648491.63

144: Remarks and Signature

Remarks	8,948 shares sold from The Tarini Ullal Trust. 8,948 shares sold from The Adeeti Ullal Trust. 44,726 shares sold from The 2000 Ullal Family Trust
Date of Notice	09/25/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/14/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Jason Coleman, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Jayshree Ullal
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)