John Stone - Nov 19, 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: Nov 19, 2021
Transactions value $: -$145,500
Form type: 4
Date filed: 11/19/2021, 05:49 PM
Previous filing: Aug 27, 2021
Next filing: Dec 23, 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	Nov 19, 2021	Direct
transaction	AMKR	Common Stock	Sale	-$234K	-9.38K	-22.91%	$25.00	31.6K	Nov 19, 2021	Direct	F1
holding	AMKR	Common Stock						2K	Nov 19, 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	-16.67%	$0.00	46.9K	Nov 19, 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 August 30, 2021.
F2	This stock option (the "Option") to acquire 150,000 shares of the common stock of Amkor Technology, Inc. (the "Option Shares") was granted on February 15, 2019 (the "Grant Date") and vests over four years as follows: (i) with respect to 25% of the Option Shares, on the first anniversary of the Grant Date; and (ii) with respect to the remainder of the Option Shares, in equal quarterly installments thereafter, such that 100% of the Option will vest on the fourth anniversary of the Grant Date.

Content

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 30, 2021.

This stock option (the "Option") to acquire 150,000 shares of the common stock of Amkor Technology, Inc. (the "Option Shares") was granted on February 15, 2019 (the "Grant Date") and vests over four years as follows: (i) with respect to 25% of the Option Shares, on the first anniversary of the Grant Date; and (ii) with respect to the remainder of the Option Shares, in equal quarterly installments thereafter, such that 100% of the Option will vest on the fourth anniversary of the Grant Date.