A10 Networks counsel reports tax share withholding

A10 Networks General Counsel Robert Scott Weber reported a tax-related share withholding.

Accepted by SEC EDGAR 02/12/2026 - 04:13 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

A10 Networks General Counsel Robert Scott Weber reported a tax-related share withholding. On February 10, 2026, 1,897 shares of common stock were automatically withheld on a non-discretionary basis to cover taxes tied to performance-based restricted stock units granted on July 1, 2022, which vested that day. Following this withholding, he directly beneficially owns 47,554 shares of A10 Networks common stock.

Insider Trade Summary

Exercise Price or Tax Liability: 1,897 shares

Exercise Price or Tax Liability 1 txn

Insider Weber Robert Scott

Role General Counsel

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	1,897	$20.92	$40K

Holdings After Transaction: Common Stock — 47,554 shares (Direct)

Footnotes (1)

1. F1. Shares automatically withheld, on a non-discretionary basis, for tax purposes related to performance-based restricted stock units granted on July, 1 2022, which vested on February 10, 2026.

FAQ

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

What insider transaction did A10 Networks (ATEN) report for Robert Scott Weber?

A10 Networks General Counsel Robert Scott Weber reported a tax-related disposition of 1,897 common shares. The shares were automatically withheld to satisfy tax obligations on previously granted performance-based restricted stock units that vested on February 10, 2026, rather than being an open-market sale.

Was the A10 Networks (ATEN) Form 4 transaction an open-market sale?

No, the Form 4 transaction was not an open-market sale. The 1,897 shares of A10 Networks common stock were automatically withheld on a non-discretionary basis to cover tax liabilities arising from vested performance-based restricted stock units, rather than being voluntarily sold in the market.

How many A10 Networks (ATEN) shares were withheld for taxes in this Form 4?

The filing shows that 1,897 shares of A10 Networks common stock were withheld. These shares were retained by the company to satisfy tax obligations connected to performance-based restricted stock units granted on July 1, 2022, which vested on February 10, 2026.

How many A10 Networks (ATEN) shares does Robert Scott Weber beneficially own after the transaction?

After the tax-withholding transaction, Robert Scott Weber beneficially owns 47,554 shares of A10 Networks common stock directly. This figure in the Form 4 reflects his remaining direct holdings following the automatic withholding of 1,897 shares to satisfy related tax liabilities.

What triggered the tax-withholding share disposition reported by A10 Networks (ATEN)?

The disposition was triggered by the vesting of performance-based restricted stock units granted on July 1, 2022. When these units vested on February 10, 2026, 1,897 A10 Networks common shares were automatically withheld on a non-discretionary basis to cover associated tax obligations.

What transaction code was used in the A10 Networks (ATEN) Form 4 and what does it mean?

The Form 4 uses transaction code “F,” which indicates payment of tax liability or exercise price by delivering securities. Here, it reflects that 1,897 A10 Networks common shares were automatically withheld to satisfy tax obligations tied to vested performance-based restricted stock units.

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

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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)
02/10/2026

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	02/10/2026		F		1,897(1)	D	$20.92	47,554	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 performance-based restricted stock units granted on July, 1 2022, which vested on February 10, 2026.

Remarks:

	/s/ Jill Osato, Attorney-in-fact	02/12/2026
	** 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).
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