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: Becker Brian (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-08-02	Common Stock	M	9314	—	Acquired	51511	Direct
2021-08-10	Common Stock	M	3334	—	Acquired	54845	Direct
2021-08-10	Common Stock	S	1082	$13.34	Disposed	53763	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-08-02	Performance-based Restricted Stock Units	$	M	9314	Disposed	2025-02-02	Common Stock (9314.0)	Direct
2021-08-10	Performance-based Restricted Stock Units	$	M	3334	Disposed	2024-10-19	Common Stock (3334.0)	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 9,314 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 October 21, 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 October 19, 2020 and October 19, 2024. The achievement of the last milestone occurred on August 5, 2021, as certified by the compensation committee on August 10, 2021, resulting in 3,334 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 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 5, 2021, 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.