Form 144: ANET insider notifies sale of Common stock

Yvonne Wassenaar filed a Form 144 to notify a proposed sale of Common stock.

Rhea-AI Filing Summary

Yvonne Wassenaar filed a Form 144 to notify a proposed sale of Common stock. The filing lists the sale method as a Restricted Stock Award and identifies J.P. Morgan Securities LLC as the broker on 05/20/2026. The filing also reports prior dispositions of Common stock in the preceding three months: 1,815 shares on 02/25/2026, 1,395 shares on 03/16/2026, and 1,395 shares on 04/15/2026.

Insights

Securities Compliance Attorney

Form 144 records a proposed sale of restricted/controlled shares via a broker on 05/20/2026.

The filing lists the security type as Common and indicates the shares derive from a Restricted Stock Award. It names J.P. Morgan Securities LLC as the broker executing the transaction.

Reported prior dispositions in the three months before the filing total 4,605 shares across three dates. Review of subsequent Form 4/stock transfer records would confirm actual settlement and any Rule 144 compliance timing.

Key Figures

Filing date / proposed sale date: 05/20/2026 Prior dispositions (02/25/2026): 1,815 shares Prior dispositions (03/16/2026): 1,395 shares +1 more

4 metrics

Filing date / proposed sale date 05/20/2026 Date listed for securities to be sold

Prior dispositions (02/25/2026) 1,815 shares Disposition reported in past 3 months

Prior dispositions (03/16/2026) 1,395 shares Disposition reported in past 3 months

Prior dispositions (04/15/2026) 1,395 shares Disposition reported in past 3 months

Key Terms

Form 144, Restricted Stock Award, J.P. Morgan Securities LLC

3 terms

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Restricted Stock Award financial

"Common | 05/20/2026 | Restricted Stock Award"

A restricted stock award is company shares given to an employee or executive that cannot be sold or fully owned until certain conditions—like staying with the company for a set time or hitting performance targets—are met. Think of it as a gift that only becomes yours after you fulfill specific obligations; for investors, these awards matter because they can increase the total shares outstanding when they vest, reveal how management is being paid and motivated, and create potential selling pressure when restrictions lift.

J.P. Morgan Securities LLC financial

"J.P. Morgan Securities LLC 270 Park Avenue - 10th Floor"

FAQ

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

What does Yvonne Wassenaar's Form 144 for ANET report?

It reports a proposed sale of Common stock via a Restricted Stock Award brokered on 05/20/2026. The filing names J.P. Morgan Securities LLC and lists prior dispositions of 1,815, 1,395, and 1,395 shares on the dates shown.

How many ANET shares were sold by Wassenaar in the prior three months?

The filing lists prior dispositions totaling 4,605 shares across three dates. Those entries show 1,815 shares on 02/25/2026, 1,395 shares on 03/16/2026, and 1,395 shares on 04/15/2026.

Which broker is named for the proposed sale in the Form 144?

The filing identifies J.P. Morgan Securities LLC at 270 Park Avenue as the broker on 05/20/2026. The broker name and address appear on the filing's securities information line.

Does the Form 144 specify the origin of the shares for sale?

Yes — the filing lists the securities as tied to a Restricted Stock Award. That classification is shown next to the securities-to-be-sold entry dated 05/20/2026.

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

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Accepted by SEC EDGAR 05/20/2026 - 04:41 PM EDT 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	0001707744
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	Yvonne Wassenaar
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	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	J.P. Morgan Securities LLC 270 Park Avenue - 10th Floor New York NY 10017	971	136846	1259202593	05/20/2026	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	05/20/2026	Restricted Stock Award	Issuer			971	05/20/2026	NA

* 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
Yvonne Wassenaar 5453 Great America Parkway Santa Clara CA 95054	Common	02/25/2026	1815	240381
Yvonne Wassenaar 5453 Great America Parkway Santa Clara CA 95054	Common	03/16/2026	1395	184404
Yvonne Wassenaar 5453 Great America Parkway Santa Clara CA 95054	Common	04/15/2026	1395	213533

144: Remarks and Signature

Remarks
Date of Notice	05/20/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/21/2025
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	/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Yvonne Wassenaar
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)