John Stone - Aug 26, 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: Aug 26, 2021
Transactions value $: -$157,688
Form type: 4
Date filed: 8/27/2021, 06:28 PM
Previous filing: Jun 29, 2021
Next filing: Nov 19, 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	Aug 26, 2021	Direct
transaction	AMKR	Common Stock	Sale	-$247K	-9.38K	-22.91%	$26.30	31.6K	Aug 26, 2021	Direct	F1
holding	AMKR	Common Stock						2K	Aug 26, 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	-14.29%	$0.00	56.3K	Aug 26, 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 price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.30 to $26.37. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the "Issuer"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4.
F2	This stock option (the "Option") to acquire 150,000 shares of the Issuer's common stock (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 price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.30 to $26.37. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the "Issuer"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4.

This stock option (the "Option") to acquire 150,000 shares of the Issuer's common stock (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.