A10 Networks (ATEN) CEO sells 100,000 shares, granted 131,516 PSUs

Rhea-AI Filing Summary

A10 Networks CEO Dhrupad Trivedi reported planned stock sales and new equity awards. On February 11–13, 2026, he sold three blocks of common stock totaling 100,000 shares in open-market transactions at weighted average prices around $20.55–$20.69 per share, under a Rule 10b5-1 trading plan adopted on September 12, 2025. After these sales, he held 713,597 common shares directly.

On February 12, 2026, he also received 131,516 restricted stock units and a separate grant of 131,516 performance-based restricted stock units. The time-based RSUs vest in three equal annual installments starting February 1, 2026, while the PSUs vest based on A10’s volume-weighted average closing price performance between February 12, 2026 and February 12, 2030, along with continued employment.

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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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

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)
02/11/2026

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	02/11/2026		S		33,333(1)	D	$20.69(2)	648,748	D
Common Stock	02/12/2026		S		33,333(1)	D	$20.56(3)	615,415	D
Common Stock	02/12/2026		A		131,516(4)	A	$0	746,931	D
Common Stock	02/13/2026		S		33,334(1)	D	$20.55(5)	713,597	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	(6)	02/12/2026		A		131,516		(7)	02/12/2030	Common Stock	131,516	$0	131,516	D

Explanation of Responses:

1. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2025.

2. This is the weighted average price of the shares sold, which ranged from $20.51 to $21.10 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

3. This is the weighted average price of the shares sold, which ranged from $20.18 to $21.11 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

4. 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.

5. This is the weighted average price of the shares sold, which ranged from $20.23 to $20.72 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

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

7. Grant of 131,516 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, 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).
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FAQ

What insider transactions did A10 Networks (ATEN) CEO Dhrupad Trivedi report?

He reported selling 100,000 shares of common stock over February 11–13, 2026, at weighted average prices around the low $20s per share, and receiving grants of 131,516 restricted stock units plus 131,516 performance-based restricted stock units on February 12, 2026.

Were the A10 Networks (ATEN) CEO stock sales part of a trading plan?

Yes. The filing states the reported sales were effected under a Rule 10b5-1 trading plan adopted by Dhrupad Trivedi on September 12, 2025. Such plans are pre-arranged, and the sales were then executed on February 11–13, 2026 at specified market prices.

What equity awards did the A10 Networks (ATEN) CEO receive in this Form 4?

On February 12, 2026, he received 131,516 restricted stock units and 131,516 performance-based restricted stock units. Each unit represents a right to receive one share of A10 Networks common stock upon satisfying the applicable vesting and performance conditions described in the filing.

How do the A10 Networks (ATEN) CEO’s RSUs from this grant vest?

The time-based RSUs vest in three equal installments. One-third vests on each of the first three anniversaries of the vesting commencement date of February 1, 2026, provided Dhrupad Trivedi continues to serve through each applicable vesting date, as specified in the disclosure.

What performance conditions apply to the A10 Networks (ATEN) CEO’s PSUs?

The 131,516 performance-based RSUs vest only if specified performance milestones are met. These milestones depend on volume-weighted average closing prices of ATEN common stock during any 100-day trading period between February 12, 2026 and February 12, 2030, plus continued employment through each vesting date.

How many A10 Networks (ATEN) shares does the CEO hold after these transactions?

Following the reported transactions, Dhrupad Trivedi directly beneficially owned 713,597 shares of A10 Networks common stock. He also directly held 131,516 performance-based restricted stock units, each representing a contingent right to receive one share upon satisfying the performance and service conditions.