A10 Networks, Inc. — Director's Dealing 2026

Feb 13, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: A10 Networks, Inc. (ATEN)
CIK: 0001580808
Period of Report: 2026-02-12

Reporting Person: Weber Robert Scott (General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-12	Common Stock	A	7413	—	Acquired	54967	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-12	Performance-based Restricted Stock Units	$	A	7413	Acquired	2030-02-12	Common Stock (7413)	Direct

Footnotes

F1: 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.

F2: Each share is represented by a Performance-based Restricted Stock Unit ("PSU").

F3: Grant of 7,413 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.