Brian Becker - Aug 2, 2021 Form 4 Insider Report for A10 Networks, Inc. (ATEN)

Role: Chief Financial Officer
Signature: /s/ Robert Cochran as attorney-in-fact
Stock symbol: ATEN
Transactions as of: Aug 2, 2021
Transactions value $: -$14,434
Form type: 4
Date filed: 8/12/2021, 04:02 PM
Next filing: Aug 10, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ATEN	Common Stock	Options Exercise	$0	+9.31K	+22.07%	$0.00	51.5K	Aug 2, 2021	Direct	F1
transaction	ATEN	Common Stock	Options Exercise	$0	+3.33K	+6.47%	$0.00	54.8K	Aug 10, 2021	Direct	F2
transaction	ATEN	Common Stock	Sale	-$14.4K	-1.08K	-1.97%	$13.34	53.8K	Aug 10, 2021	Direct	F3

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	-9.31K	-33.33%	$0.00	18.6K	Aug 2, 2021	Common Stock	9.31K		Direct	F1
transaction	ATEN	Performance-based Restricted Stock Units	Options Exercise	$0	-3.33K	-100%	$0.00^*	0	Aug 10, 2021	Common Stock	3.33K		Direct	F2

* 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 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.