A10 Networks (NYSE: ATEN) CEO reports RSU tax share withholding

Rhea-AI Filing Summary

A10 Networks, Inc. Chief Executive Officer and director Dhrupad Trivedi reported an automatic tax-withholding transaction in company common stock. On January 15, 2026, 13,106 shares of common stock were withheld at a price of $17.58 per share to cover taxes related to a performance restricted stock unit grant dated January 30, 2024 that vested on that date. After this withholding, Trivedi beneficially owned 762,389 shares of A10 Networks common stock directly.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Trivedi Dhrupad

Role Chief Executive Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	13,106	$17.58	$230K

Holdings After Transaction: Common Stock — 762,389 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 01/16/2026 - 05:17 PM Learn about SEC filing dates

FAQ

What insider transaction did A10 Networks (ATEN) report in this Form 4?

The filing reports that Chief Executive Officer and director Dhrupad Trivedi had 13,106 shares of A10 Networks common stock automatically withheld on January 15, 2026 to cover taxes on a vested performance restricted stock unit grant.

What was the price per share for the A10 Networks (ATEN) tax withholding?

The 13,106 shares of A10 Networks common stock were withheld at a price of $17.58 per share in connection with the tax-withholding transaction.

How many A10 Networks (ATEN) shares does the CEO hold after this Form 4 transaction?

Following the reported withholding transaction, Chief Executive Officer Dhrupad Trivedi beneficially owned 762,389 shares of A10 Networks common stock, held directly.

Was the A10 Networks (ATEN) Form 4 transaction a sale initiated by the CEO?

No. The Form 4 notes that the 13,106 shares were automatically withheld on a non-discretionary basis for tax purposes related to a performance restricted stock unit grant that vested on January 15, 2026.

What equity award is referenced in this A10 Networks (ATEN) Form 4 filing?

The transaction relates to a performance restricted stock unit grant dated January 30, 2024, which vested on January 15, 2026, triggering the automatic tax-withholding of shares.

Is the A10 Networks (ATEN) CEO considered a director and officer in this Form 4?

Yes. The Form 4 identifies Dhrupad Trivedi as both a director and an officer, with the officer title listed as Chief Executive Officer.

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^*

Trivedi Dhrupad

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
01/15/2026

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	01/15/2026		F		13,106(1)	D	$17.58	762,389	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 January 30, 2024 performance restricted stock unit grant that vested on January 15, 2026.

Remarks:

	/s/ Jill Osato, Attorney-in-fact	01/16/2026
	** 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.