A10 Networks, Inc. — Director's Dealing 2021

Aug 12, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: A10 Networks, Inc. (ATEN)
CIK: 0001580808
Period of Report: 2021-08-02

Reporting Person: Trivedi Dhrupad (Director, Chief Executive Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-08-02	Common Stock	M	39587	—	Acquired	454596	Direct
2021-08-10	Common Stock	M	125000	—	Acquired	579596	Direct
2021-08-10	Common Stock	S	4597	$13.34	Disposed	574999	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-08-02	Performance-based Restricted Stock Units	$	M	39587	Disposed	2025-02-02	Common Stock (39587.0)	Direct
2021-08-10	Performance-based Restricted Stock Units	$	M	125000	Disposed	2023-12-12	Common Stock (125000.0)	Direct

Footnotes

F1: Performance-Based Restricted Stock Units were previously reported on February 4, 2021, 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 2, 2021 and February 2, 2025. The achievement of the first milestone occurred on July 30, 2021, as certified by the compensation committee August 2, 2021, resulting in 39,587 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 (1/3) on August 9, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of July 30, 2021, subject to continued employment. These shares are reflected on Table I.

F2: Performance-Based Restricted Stock Units were previously reported on December 16, 2019, 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 December 12, 2019 and December12, 2023. The last achievement date occurred on August 5, 2021, as certified by the compensation committee of ATEN on August 10, 2021, resulting in 125,000 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 (1/3) on the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I.

F3: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.