[Form 4] A10 NETWORKS INC Insider Trading Activity

Rhea-AI Filing Summary

A10 Networks CFO Brian Becker reported an insider sale of 6,400 shares of A10 Networks common stock on 08/13/2025 at a price of $18.03 per share. After the sale he beneficially owned 77,599 shares. The Form 4 was signed by an attorney-in-fact on 08/14/2025. The filing discloses a single non-derivative transaction and shows the company officer reducing his direct holdings through a sale.

Positive

• Timely disclosure of the insider transaction via a Form 4, demonstrating regulatory compliance
• Clear transaction details provided: shares sold (6,400), price ($18.03), and post-sale beneficial ownership (77,599)

Negative

• Insider sale by the Chief Financial Officer reduces direct ownership, which some investors may view negatively
• No context in the filing for the reason behind the sale (personal liquidity, diversification, planned sale), so interpretation is limited

Insights

Securities Analyst

TL;DR A routine insider sale by the CFO reduced direct holdings but does not by itself indicate company performance issues.

The sale of 6,400 shares at $18.03 is a modest-sized disposition relative to typical executive holdings. Because the filing shows a single open-market sale and no derivative activity or other changes to beneficial ownership structure, this appears to be a liquidity event by the reporting person rather than a corporate governance change. Investors should note timing and magnitude but avoid over-interpreting one-off Form 4 sales without additional context such as patterns or concurrent material disclosures.

Corporate Governance Expert

TL;DR The Form 4 shows compliance with Section 16 reporting; the sale is material only as insider information but lacks broader governance implications.

The filing was executed properly and signed by an attorney-in-fact, indicating standard administrative handling. There are no indications of related-party transactions, option exercises, or transfers to affiliates. From a governance perspective this is a routine disclosure: it documents transparency but does not signal a change in board or executive status.

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

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^*

Becker Brian

(Last) (First) (Middle)

2300 ORCHARD PARKWAY

(Street)

SAN JOSE CA 95131

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
A10 Networks, Inc. [ ATEN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

3. Date of Earliest Transaction (Month/Day/Year)
08/13/2025

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	08/13/2025		S		6,400	D	$18.03	77,599	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:

Remarks:

	/s/ Jill Osato, Attorney-in-fact	08/14/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did A10 Networks (ATEN) insider Brian Becker report on Form 4?

The CFO reported selling 6,400 shares of common stock on 08/13/2025 at $18.03 per share, leaving 77,599 shares beneficially owned.

Was the Form 4 for ATEN filed timely and properly signed?

Yes; the Form 4 lists the transaction date as 08/13/2025 and includes a signature by an attorney-in-fact dated 08/14/2025.

Does the Form 4 show any derivative transactions for ATEN by this reporting person?

No; Table II for derivative securities contains no entries, indicating no options, warrants, or other derivatives were reported.

How large was the sale relative to the reporting person's remaining holdings?

The sale was 6,400 shares versus 77,599 shares held after the sale; the filing does not state the total pre-sale holdings explicitly.

Does the filing indicate the reason for the sale or a Rule 10b5-1 plan?

The Form 4 does not provide narrative reasons or indicate that the transaction was made pursuant to a Rule 10b5-1 plan.