A10 Networks, Inc. — Director's Dealing 2021

Mar 25, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: A10 Networks, Inc. (ATEN)
CIK: 0001580808
Period of Report: 2021-03-23

Reporting Person: BRUENING MATTHEW P (EVP, Worldwide Sales & Mktg)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-03-23	Common Stock	M	33333	—	Acquired	109630	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-03-23	Performance-based Restricted Stock Units	$	M	33333	Disposed	2024-04-29	Common Stock (33333.0)	Direct

Footnotes

F1: Performance-Based Restricted Stock Units were previously reported on May 1, 2020, 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 April 29, 2020 and April 29, 2024. The second achievement date occurred on March 12, 2021 as certified by the compensation committee of ATEN on March 23, 2021, resulting in 33,333 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third on each of the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I.