Dhrupad Trivedi - 11 Feb 2026 Form 4 Insider Report for A10 Networks, Inc. (ATEN)

Role
Chief Executive Officer, Director
Signature
/s/ Jill Osato, Attorney-in-fact
Issuer symbol
ATEN
Transactions as of
11 Feb 2026
Net transactions value
-$2,060,000
Form type
4
Filing time
13 Feb 2026, 17:28:20 UTC
Previous filing
12 Feb 2026
Next filing
26 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Trivedi Dhrupad Chief Executive Officer, Director C/O A10 NETWORKS, INC., 2300 ORCHARD PARKWAY, SAN JOSE /s/ Jill Osato, Attorney-in-fact 13 Feb 2026 0001570462

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ATEN Common Stock Sale $689,660 -33,333 -4.9% $20.69 648,748 11 Feb 2026 Direct F1, F2
transaction ATEN Common Stock Sale $685,326 -33,333 -5.1% $20.56 615,415 12 Feb 2026 Direct F1, F3
transaction ATEN Common Stock Award $0 +131,516 +21% $0.000000 746,931 12 Feb 2026 Direct F4
transaction ATEN Common Stock Sale $685,014 -33,334 -4.5% $20.55 713,597 13 Feb 2026 Direct F1, F5

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction ATEN Performance-based Restricted Stock Units Award $0 +131,516 $0.000000 131,516 12 Feb 2026 Common Stock 131,516 Direct F6, F7
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

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).

Explanation of Responses:

Id Content
F1 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.
F2 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.
F3 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.
F4 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.
F5 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.
F6 Each share is represented by a Performance-based Restricted Stock Unit ("PSU").
F7 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.