AMKOR TECHNOLOGY, INC. — Director's Dealing 2023

Feb 25, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMKOR TECHNOLOGY, INC. (AMKR)
CIK: 0001047127
Period of Report: 2023-02-22

Reporting Person: Engel Kevin (Executive Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-02-22	Common Stock	A	17843	$0.00	Acquired	18825	Direct
2023-02-22	Common Stock	F	7804	$25.46	Disposed	11021	Direct
2023-02-23	Common Stock	M	6250	$9.48	Acquired	17271	Direct
2023-02-23	Common Stock	S	14250	$25.26	Disposed	3021	Direct
2023-02-24	Common Stock	M	941	$0.00	Acquired	3962	Direct
2023-02-24	Common Stock	F	392	$25.27	Disposed	3570	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2023-02-23	Employee Stock Option (Right-to-Buy)	$9.48	M	6250	Disposed	2019-02-15	Common Stock (6250)	Direct
2023-02-24	Restricted Stock Units	$0.00	M	941	Disposed		Common Stock (941)	Direct

Footnotes

F1: This Form 4 reports the vesting on February 22, 2023 of 17,843 shares of common stock of Amkor Technology, Inc. (the "Issuer") underlying performance-vested restricted stock units ("PSUs") granted to the Reporting Person on February 11, 2021 pursuant to the Issuer's Second Amended and Restated 2007 Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic cumulative earnings per share performance goal over a two-year performance period beginning January 1, 2021 and ending on December 31, 2022.

F2: The transaction represents shares of the Issuer's common stock withheld by the Issuer in connection with the vesting of PSUs to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

F3: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.25 to $25.30. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, 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 (3) to this Form 4.

F4: On February 24, 2022 (the "RSU Grant Date"), the Reporting Person was granted 3,761 time-vested restricted stock units ("RSUs") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's common stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date.

F5: The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the Reporting Person on the RSU Grant Date. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

F6: This stock option (the "Option") to acquire 100,000 shares of the Issuer's common stock (the "Option Shares") was granted on February 15, 2019 (the "Option Grant Date") and vested over four years as follows: (i) with respect to 25% of the Option Shares, on the first anniversary of the Option Grant Date; and (ii) with respect to the remainder of the Option Shares, in equal quarterly installments thereafter, such that 100% of the Option became vested on the fourth anniversary of the Option Grant Date.