Matthew P. Bruening - Feb 2, 2023 Form 4 Insider Report for A10 Networks, Inc. (ATEN)

Role: EVP, Worldwide Sales & Mktg
Signature: /s/ Jill Osato, Attorney-in-fact
Stock symbol: ATEN
Transactions as of: Feb 2, 2023
Transactions value $: -$24,204
Form type: 4
Date filed: 2/3/2023, 06:46 PM
Previous filing: Feb 1, 2023
Next filing: Feb 6, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ATEN	Common Stock	Options Exercise	$0	+12.2K	+10.41%	$0.00	129K	Feb 2, 2023	Direct	F1
transaction	ATEN	Common Stock	Sale	-$24.2K	-1.53K	-1.18%	$15.83	128K	Feb 2, 2023	Direct	F2

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	Options Exercise	$0	-12.2K	-33.34%	$0.00	24.4K	Feb 2, 2023	Common Stock	12.2K	$0.00	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Performance-Based Restricted Stock Units were previously reported on January 27, 2022, 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 January 25, 2022 and January 25, 2026. The first achievement date occurred on January 23, 2023, as certified by the compensation committee of ATEN, resulting in 12,179 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 February 13, 2023 and an additional one-third (1/3) to vest on the each of the first and second anniversaries of January 23, 2023, subject to continued employment.
F2	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.

Content

Performance-Based Restricted Stock Units were previously reported on January 27, 2022, 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 January 25, 2022 and January 25, 2026. The first achievement date occurred on January 23, 2023, as certified by the compensation committee of ATEN, resulting in 12,179 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 February 13, 2023 and an additional one-third (1/3) to vest on the each of the first and second anniversaries of January 23, 2023, subject to continued employment.

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.