John Stone - Jun 25, 2021 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Role: Executive Vice President
Signature: Mark N. Rogers, Attorney-in-Fact for John Charles Stone
Stock symbol: AMKR
Transactions as of: Jun 25, 2021
Transactions value $: -$136,125
Form type: 4
Date filed: 6/29/2021, 05:21 PM
Next filing: Aug 27, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMKR	Common Stock	Options Exercise	$88.9K	+9.38K	+29.71%	$9.48	40.9K	Jun 25, 2021	Direct
transaction	AMKR	Common Stock	Sale	-$225K	-9.38K	-22.91%	$24.00	31.6K	Jun 25, 2021	Direct	F1
holding	AMKR	Common Stock						2K	Jun 25, 2021	Held in Trust

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	AMKR	Employee Stock Option (Right-to-Buy)	Options Exercise	$0	-9.38K	-12.5%	$0.00	65.6K	Jun 25, 2021	Common Stock	9.38K	$9.48	Direct	F2

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

Explanation of Responses:

Id	Content
F1	The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 16, 2021.
F2	This stock option was granted on February 15, 2019 and will vest over four years as follows: 25% on the first anniversary of the grant date and 1/16 of the option will vest each quarter thereafter so that at the end of the fourth year, 100% of the option will be vested.