Guillaume Marie Jean Rutten - May 17, 2021 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Role: President and CEO, Director
Signature: Mark N. Rogers, Attorney-in-Fact for Guillaume Marie Jean Rutten
Stock symbol: AMKR
Transactions as of: May 17, 2021
Transactions value $: -$140,100
Form type: 4
Date filed: 5/19/2021, 05:28 PM
Next filing: Jun 17, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMKR	Common Stock	Options Exercise	$142K	+15K	+3.53%	$9.48	440K	May 17, 2021	Direct
transaction	AMKR	Common Stock	Sale	-$282K	-15K	-3.41%	$18.82	425K	May 17, 2021	Direct	F1, 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	AMKR	Employee Stock Option (Right-to-Buy)	Options Exercise	$0	-15K	-18.4%	$0.00	66.5K	May 17, 2021	Common Stock	15K	$9.48	Direct	F3

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

Explanation of Responses:

Id	Content
F1	The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 12, 2020.
F2	The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $18.563 to $19.09.
F3	This stock option was granted on February 15, 2019 and vests as follows: 25% of the shares vest on the first anniversary of the grant date and 1/16 of the option vests each quarter thereafter, such that 100% of the option will vest on the fourth anniversary of the grant date.