Rule 144 Notice: 6,400 A10 Networks shares to be sold on NYSE

Rhea-AI Filing Summary

A10 Networks (ATEN) filed a Rule 144 notice disclosing a proposed sale of 6,400 common shares through Morgan Stanley Smith Barney LLC on the NYSE, with an aggregate market value of $115,392 and approximately 72,152,615 shares outstanding. The securities listed were recently acquired as equity awards: 1,199 performance shares on 02/20/2025, 2,493 performance shares on 02/13/2025, and 2,708 restricted stock units on 02/01/2025. The seller indicates the sale is planned for 08/13/2025.

The filing also states there were no securities sold by the reporting person in the past three months and includes the standard representation that the seller does not possess undisclosed material adverse information about the issuer. The planned sale is small relative to the company’s outstanding shares (under 0.01%), and the transaction is presented as a routine Rule 144 disposition of recently vested award shares.

Positive

• Transparent disclosure of the planned sale under Rule 144 with broker, date, share counts, and acquisition details
• Small size of the proposed sale relative to outstanding shares (approximately 0.0089%), indicating limited market impact
• Securities were recently acquired as equity awards (performance shares and restricted stock), showing the sale arises from vesting events

Negative

• None.

Insights

Securities Analyst

TL;DR: Small Rule 144 sale of 6,400 shares (<0.01% of float) from recent equity awards; immaterial to market cap but notable for insider liquidity.

The filing shows a planned sale of 6,400 common shares via Morgan Stanley on 08/13/2025 with an aggregate market value of $115,392 against 72,152,615 shares outstanding. The shares were granted as performance shares and restricted stock between 02/01/2025 and 02/20/2025 and thus reflect recent vesting events rather than open-market accumulation. Given the size (approximately 0.0089% of outstanding shares), this disposal is unlikely to move the stock price or materially affect capitalization. Disclosure complies with Rule 144 and provides transparency about insider liquidity timing.

Corporate Governance Expert

TL;DR: Filing indicates governance compliance and disclosure of insider sale; no red flags in the notice itself.

The Form 144 lists the broker, planned sale date, share counts, acquisition dates, and nature of the awards, which aligns with standard reporting practices for dispositions under Rule 144. The reporting person affirms they are not aware of undisclosed material adverse information. There are no disclosed sales in the prior three months. The combination of recent awards and a small planned sale suggests routine post-vesting liquidity rather than coordinated insider transfer or governance concern based on the information provided.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	6400	115392.00	72152615	08/13/2025	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	02/20/2025	Performance Shares	Issuer			1199	02/20/2025	Not Applicable
Common	02/13/2025	Performance Shares	Issuer			2493	02/13/2025	Not Applicable
Common	02/01/2025	Restricted Stock	Issuer			2708	02/01/2025	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

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What shares is A10 Networks (ATEN) planning to sell under Form 144?

The notice covers the proposed sale of 6,400 common shares of A10 Networks (ATEN).

Who is the broker handling the ATEN sale and where will the sale occur?

The broker is Morgan Stanley Smith Barney LLC and the sale is listed on the NYSE.

What is the aggregate market value and approximate sale date reported?

The aggregate market value is listed as $115,392 and the approximate date of sale is 08/13/2025.

How and when were the shares being sold originally acquired?

The shares were acquired as equity awards: 1,199 performance shares on 02/20/2025, 2,493 performance shares on 02/13/2025, and 2,708 restricted stock on 02/01/2025.

Has the reporting person sold any issuer securities in the past three months?

The filing states Nothing to Report for securities sold during the past three months.

Does the seller claim possession of undisclosed material information?

By signing the notice, the person represents they do not know any material adverse information