[Form 4] A10 NETWORKS INC Insider Trading Activity

Rhea-AI Filing Summary

On 7 July 2025, A10 Networks (ATEN) General Counsel Robert Scott Weber filed a Form 4 disclosing the disposition of 1,894 common shares at an indicated price of $20.14 per share. The transaction is coded “F,” meaning the shares were automatically withheld to cover tax liabilities arising from a June 1 2022 restricted-stock-unit (RSU) grant that vested on 5 July 2025. Because the shares were not sold on the open market, the filing has no direct cash-sale implications. After the withholding, Weber’s direct beneficial ownership stands at 56,613 shares. No derivative securities were acquired or disposed of, and there are no indications of additional insider activity. Overall, the event represents a routine tax-withholding adjustment rather than a change in Weber’s investment stance or the company’s fundamentals.

Insights

Securities Analyst

TL;DR – Routine tax withholding, negligible impact on ATEN share dynamics.

This Form 4 shows a non-discretionary share disposition: 1,894 shares (~$38k) withheld to satisfy RSU-related taxes. With Weber still holding 56,613 shares, insider alignment remains intact. The absence of open-market selling and the small size relative to ATEN’s float (<0.1%) suggest no material signal for investors or liquidity.

Corporate Governance Expert

TL;DR – Standard Section 16 compliance; corporate governance unaffected.

The filing fulfills regulatory obligations under Section 16(a). Code F indicates automatic tax withholding, a common mechanism that neither reflects intent to liquidate holdings nor raises governance concerns. No additional footnotes or multi-party reporting signal. Impact is administratively routine and non-impactful from a governance risk perspective.

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^*

Weber Robert Scott

(Last) (First) (Middle)

C/O A10 NETWORKS, INC.

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)
	General Counsel

3. Date of Earliest Transaction (Month/Day/Year)
07/07/2025

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	07/07/2025		F		1,894(1)	D	$20.14	56,613	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:

1. Shares automatically withheld, on a non-discretionary basis, for tax purposes related to a July 1, 2022 restricted stock unit grant that vested on July 5, 2025.

Remarks:

	/s/ Jill Osato, Attorney-in-fact	07/07/2025
	** 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 insider transaction did A10 Networks (ATEN) report on July 7, 2025?

The General Counsel had 1,894 shares withheld to cover taxes on a vested RSU grant.

Was the 1,894-share disposition an open-market sale?

No. The Form 4 code “F” denotes automatic tax withholding, not an open-market transaction.

How many ATEN shares does Robert Scott Weber own after the transaction?

He directly owns 56,613 common shares following the withholding.

Does this Form 4 filing indicate bearish sentiment from the insider?

The filing is administrative; it does not reflect discretionary selling and is therefore neutral on sentiment.

Were any derivative securities involved in the July 7, 2025 filing?

No derivative securities were acquired or disposed of in this Form 4.