A10 Networks (ATEN) General Counsel reports 1,897-share tax-withholding transaction

Rhea-AI Filing Summary

A10 Networks, Inc. General Counsel Robert Scott Weber reported a routine tax-related share disposition. On July 6, 2026, 1,897 shares of common stock were withheld at $36.30 per share to cover taxes on a restricted stock unit grant that vested on July 5, 2026. After this non-discretionary withholding, he directly holds 64,672 shares, which include 1,042 shares acquired through the company’s Employee Stock Purchase Plan on May 31, 2026.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Weber Robert Scott

Role General Counsel

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	1,897	$36.30	$69K

Holdings After Transaction: Common Stock — 64,672 shares (Direct, null)

Footnotes (1)

1. Shares withheld, on a non-discretionary basis, for tax purposes related to a July 1, 2022 restricted stock unit grant that vested on July 5, 2026. Includes 1,042 shares acquired by the Reporting Person on May 31, 2026 pursuant to the Issuer's Employee Stock Purchase Plan.

Key Figures

Shares withheld for taxes: 1,897 shares Withholding price per share: $36.30 per share Shares held after transaction: 64,672 shares +3 more

6 metrics

Shares withheld for taxes 1,897 shares Tax-withholding disposition on July 6, 2026

Withholding price per share $36.30 per share Price used for tax-withholding shares

Shares held after transaction 64,672 shares Direct holdings following July 6, 2026 withholding

ESPP shares included 1,042 shares Acquired May 31, 2026 under Employee Stock Purchase Plan

RSU grant date July 1, 2022 Restricted stock unit grant underlying this vesting

RSU vesting date July 5, 2026 Vesting that triggered tax-withholding shares

Key Terms

restricted stock unit, Employee Stock Purchase Plan, tax-withholding disposition

3 terms

restricted stock unit financial

"related to a July 1, 2022 restricted stock unit grant that vested"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

Employee Stock Purchase Plan financial

"pursuant to the Issuer's Employee Stock Purchase Plan"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

tax-withholding disposition financial

"transaction_action": "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/06/2026 - 05:47 PM Accepted by SEC EDGAR 07/06/2026 - 05:46 PM Learn about SEC filing dates

FAQ

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

A10 Networks reported that General Counsel Robert Scott Weber had 1,897 shares of common stock withheld to cover taxes on vested restricted stock units. This was a non-discretionary tax-withholding disposition, not an open-market sale of shares.

Was the A10 Networks (ATEN) Form 4 transaction a sale on the open market?

No, the Form 4 shows a tax-withholding disposition, not an open-market sale. Shares were withheld automatically to satisfy tax obligations tied to a restricted stock unit grant that vested on July 5, 2026.

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

The filing reports 1,897 shares of A10 Networks common stock withheld at $36.30 per share. These shares were used solely to cover tax liabilities associated with the vesting of a prior restricted stock unit grant.

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

Following the reported tax-withholding transaction, Robert Scott Weber directly holds 64,672 shares of A10 Networks common stock. This total includes 1,042 shares he previously acquired under the company’s Employee Stock Purchase Plan on May 31, 2026.

What equity award triggered the tax-withholding in the A10 Networks (ATEN) Form 4?

The tax-withholding arose from a restricted stock unit grant dated July 1, 2022. That grant vested on July 5, 2026, and the company withheld 1,897 shares on a non-discretionary basis to satisfy the associated tax obligations.

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 CALIFORNIA 95131

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/06/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	07/06/2026		F		1,897(1)	D	$36.3	64,672(2)	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 withheld, on a non-discretionary basis, for tax purposes related to a July 1, 2022 restricted stock unit grant that vested on July 5, 2026.

2. Includes 1,042 shares acquired by the Reporting Person on May 31, 2026 pursuant to the Issuer's Employee Stock Purchase Plan.

Remarks:

	/s/ Jill Osato, Attorney-in-fact	07/06/2026
	** 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.
* Form 4: SEC 1474 (03-26)