ATEN Form 144: Proposed resale of 5,091 and 955/954 shares

Morgan Stanley Smith Barney LLC Executive Financial Services submitted a Form 144 notice reporting proposed sales of Common Stock by an issuer-related holder.

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC Executive Financial Services submitted a Form 144 notice reporting proposed sales of Common Stock by an issuer-related holder. The excerpt lists proposed dispositions tied to restricted stock and performance share awards dated 05/11/2026, 05/05/2026, and 05/14/2026.

The filing shows quantities of 5,091 shares (restricted stock) and two performance-share entries of 955 and 954 shares respectively. The form lists an NYSE reference and an administrative date of 06/10/2026.

Insights

Securities Counsel

Routine Form 144 notice for proposed resale of award-based shares; disclosure is administrative.

The excerpt lists proposed dispositions of restricted stock and performance shares, including 5,091, 955, and 954 share line items dated in May 2026. The filing names Morgan Stanley Smith Barney LLC Executive Financial Services as the broker-dealer involved.

These entries are procedural: they notify the SEC of intended resale under Section 144. Cash-flow treatment and whether sales occurred are not provided in the excerpt; subsequent transaction reports would confirm completed sales.

Key Figures

Form date: 06/10/2026 Restricted Stock shares: 5,091 shares Performance Shares (1): 955 shares +2 more

5 metrics

Form date 06/10/2026 Form 144 administrative date

Restricted Stock shares 5,091 shares Restricted Stock dated 05/11/2026

Performance Shares (1) 955 shares Performance Shares dated 05/05/2026

Performance Shares (2) 954 shares Performance Shares dated 05/14/2026

Broker-dealer reference Morgan Stanley Smith Barney LLC Listed as executing broker

Key Terms

Form 144, Restricted Stock, Performance Shares, Broker-dealer

4 terms

Form 144 regulatory

"submitted a Form 144 notice reporting proposed sales"

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 financial

"Common | 05/11/2026 | Restricted Stock | Issuer"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Performance Shares financial

"Common | 05/05/2026 | Performance Shares | Issuer"

Performance shares are a type of company stock given to executives or employees that only become theirs if the company meets specific goals, like hitting certain profits or growth targets. They motivate leaders to work toward the company’s success, because their additional shares depend on achieving these results.

Broker-dealer market

"Morgan Stanley Smith Barney LLC Executive Financial Services"

A broker-dealer is a licensed firm or individual that both executes trades on behalf of clients (acting as a broker) and buys or sells securities for its own account (acting as a dealer). Investors care because broker-dealers provide the plumbing of markets — they place orders, hold or move cash and securities, offer research or advice, and their stability and fees directly affect trade execution, costs, and the safety of client funds; think of them as a combined travel agent and taxi for your investments.

FAQ

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

What does ATEN's Form 144 filing report?

The filing reports proposed sales of Common Stock tied to award shares. It lists 5,091 restricted shares and performance-share entries of 955 and 954, with dates in May 2026 and a form date of 06/10/2026.

Who is listed as the broker/dealer on the Form 144 for ATEN?

Morgan Stanley Smith Barney LLC Executive Financial Services is named as the broker-dealer. The excerpt provides the firm name and address associated with the proposed resale filings for the listed share lots.

Do the numbers on Form 144 indicate completed sales?

No. Form 144 indicates proposed or intended resale quantities. The excerpt shows proposed amounts (for example 5,091, 955, 954) but does not confirm whether those shares were sold or the proceeds received.

What types of awards are referenced in the ATEN Form 144 excerpt?

The excerpt references Restricted Stock and Performance Shares. Each line pairs an award type with a date and a share quantity, indicating the source of the shares proposed for resale.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 06/10/2026 - 05:34 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	0002074992
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	A10 NETWORKS, INC.
SEC File Number	001-36343
Address of Issuer	2300 Orchard Parkway, San Jose CALIFORNIA 95131
Phone	(408) 325-8668
Name of Person for Whose Account the Securities are To Be Sold	SHEEN KHOURY
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	Former Officer

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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	7000	220929.10	71998175	06/10/2026	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	05/11/2026	Restricted Stock	Issuer			5091	05/11/2026	Not Applicable
Common	05/05/2026	Performance Shares	Issuer			955	05/05/2026	Not Applicable
Common	05/14/2026	Performance Shares	Issuer			954	05/14/2026	Not Applicable

* 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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	06/10/2026
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/ Sheen George Khoury
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)