Robert D. Cochran - Sep 11, 2021 Form 4 Insider Report for A10 Networks, Inc. (ATEN)

Role: EVP Legal & Corp Collaboration
Signature: /s/ Robert D. Cochran
Stock symbol: ATEN
Transactions as of: Sep 11, 2021
Transactions value $: -$801,044
Form type: 4
Date filed: 9/14/2021, 06:32 PM
Previous filing: Sep 1, 2021
Next filing: Sep 21, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ATEN	Common Stock	Options Exercise	$0	+11.6K	+3.79%	$0.00	319K	Sep 11, 2021	Direct	F1
transaction	ATEN	Common Stock	Options Exercise	$11.3K	+3.73K	+1.17%	$3.04^*	322K	Sep 13, 2021	Direct
transaction	ATEN	Common Stock	Options Exercise	$413K	+136K	+42.18%	$3.04^*	458K	Sep 13, 2021	Direct
transaction	ATEN	Common Stock	Tax liability	-$1.23M	-83.9K	-18.31%	$14.60	374K	Sep 13, 2021	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	-11.6K	-100%	$0.00^*	0	Sep 11, 2021	Common Stock	11.6K		Direct	F1
transaction	ATEN	Common Stock, par value $0.00001	Options Exercise	$0	-3.73K	-100%	$0.00^*	0	Sep 13, 2021	Common Stock	3.73K	$3.04	Direct	F3
transaction	ATEN	Common Stock, par value $0.00001	Options Exercise	$0	-136K	-100%	$0.00^*	0	Sep 13, 2021	Common Stock	136K	$3.04	Direct	F3

* 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) calendar day trading period between February 2, 2021 and February 2, 2025. The last milestone achievement date occurred on September 2, 2021, as certified by the compensation committee of ATEN on September 11, 2021, resulting in 11,644 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 September 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of September 2, 2021, subject to continued employment. These shares are reflected on Table I.
F2	Represents a "net exercise" of outstanding stock options. The reporting person received 55,795 shares of common stock on net exercise of options to purchase 139,732 shares of common stock. The Company withheld 83,937 shares of common stock underlying the stock option for payment of the exercise price and tax withholdings, using the closing stock price on September 13, 2021 of $14.60, pursuant to the terms of the 2008 Equity Incentive Plan.
F3	The non-statutory stock option award vested as to 1/4th of the total number of shares on January 12, 2013 with an addition 1/48th of the total number of shares vesting at the end of each full month thereafter.