CFO at A10 Networks (ATEN) receives 5,978 performance stock units

Rhea-AI Filing Summary

Caron Michelle Elizabeth reported acquisition or exercise transactions in this Form 4 filing.

A10 Networks, Inc. reported that its Chief Financial Officer, Caron Michelle Elizabeth, received new equity awards on February 12, 2026. She was granted 5,978 restricted stock units (RSUs) of common stock, bringing her directly owned common shares to 19,684. One-third of these RSUs will vest on each of the first three anniversaries of the February 1, 2026 vesting start date, as long as she remains employed. She was also granted 5,978 performance-based restricted stock units (PSUs), each tied to one share of common stock. These PSUs vest only if A10’s stock achieves specified volume-weighted average price levels during any 100-day trading period between February 12, 2026 and February 12, 2030, followed by time-based vesting linked to continued employment.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Caron Michelle Elizabeth

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Grant/Award	Performance-based Restricted Stock Units	5,978	$0.00	--
Grant/Award	Common Stock	5,978	$0.00	--

Holdings After Transaction: Performance-based Restricted Stock Units — 5,978 shares (Direct); Common Stock — 19,684 shares (Direct)

Footnotes (1)

1. Each share is represented by a Restricted Stock Unit ("RSU"). One-third (1/3) of the total RSUs will vest on each of the first three (3) anniversaries of the Vesting Commencement Date (2/1/2026), provided that the Reporting Person continues to serve through each such vesting date. Each share is represented by a Performance-based Restricted Stock Unit ("PSU"). Grant of 5,978 PSUs, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 12, 2026 and February 12, 2030 (each, a "Performance Milestone"). Upon achievement of a Performance Milestone, vesting is subject to continued employment with the Company through the applicable vesting date, the first fifty percent ( 50%) of which will occur within thirty (30) days of achievment of the applicable milestone and the balance to vest twenty-five percent (25%) on each of the first and second anniversaries of achievement of the corresponding Performance Milestone.

Form 4 Insider Transactions: What Each Field Means →

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
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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^*

Caron Michelle Elizabeth

(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)
02/12/2026

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	02/12/2026		A		5,978(1)	A	$0	19,684	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
Performance-based Restricted Stock Units	(2)	02/12/2026		A		5,978		(3)	02/12/2030	Common Stock	5,978	$0	5,978	D

Explanation of Responses:

1. Each share is represented by a Restricted Stock Unit ("RSU"). One-third (1/3) of the total RSUs will vest on each of the first three (3) anniversaries of the Vesting Commencement Date (2/1/2026), provided that the Reporting Person continues to serve through each such vesting date.

2. Each share is represented by a Performance-based Restricted Stock Unit ("PSU").

3. Grant of 5,978 PSUs, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 12, 2026 and February 12, 2030 (each, a "Performance Milestone"). Upon achievement of a Performance Milestone, vesting is subject to continued employment with the Company through the applicable vesting date, the first fifty percent ( 50%) of which will occur within thirty (30) days of achievment of the applicable milestone and the balance to vest twenty-five percent (25%) on each of the first and second anniversaries of achievement of the corresponding Performance Milestone.

Remarks:

	/s/ Jill Osato, as Attorney-in-Fact	02/13/2026
	** 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.

FAQ

What equity awards did A10 Networks (ATEN) grant its CFO on February 12, 2026?

A10 Networks granted its CFO 5,978 restricted stock units and 5,978 performance-based restricted stock units. Each unit represents one share of common stock, providing time-based and performance-based incentives tied to the company’s future share price and continued employment.

How do the RSUs granted to the A10 Networks (ATEN) CFO vest?

The 5,978 RSUs vest in three equal installments over three years. One-third vests on each of the first three anniversaries of the February 1, 2026 vesting commencement date, provided the CFO continues serving through each respective vesting date.

What performance conditions apply to the PSUs granted to the A10 Networks (ATEN) CFO?

The 5,978 PSUs vest only if A10 Networks’ stock reaches specified volume-weighted average closing prices. The required prices must be achieved during any 100-day trading period between February 12, 2026 and February 12, 2030, creating performance-linked vesting triggers.

How is vesting structured after a performance milestone is achieved for A10 Networks (ATEN) PSUs?

Once a performance milestone is achieved, 50% of the related PSUs vest within 30 days. The remaining 50% vests in two equal 25% installments on the first and second anniversaries of that milestone, subject to the CFO’s continued employment with A10 Networks.

How many A10 Networks (ATEN) common shares does the CFO own after these Form 4 transactions?

Following the reported RSU grant, the CFO beneficially owns 19,684 shares of A10 Networks common stock directly. This figure reflects the amount shown as beneficially owned after the transaction in the non-derivative securities table of the Form 4 filing.

Are the equity awards to the A10 Networks (ATEN) CFO open-market purchases or compensation grants?

The awards are compensation grants, not open-market purchases. The Form 4 uses transaction code “A” for grant, award, or other acquisition, with a reported price of $0.00 per unit for both the RSUs and PSUs received by the CFO.