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: KIM AGNES C (Member of 10% owner group (11))

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-02-22	Common Stock	J	384000	$25.28	Acquired	69793857	Indirect
2023-02-22	Common Stock	J	384000	$25.28	Acquired	70177857	Indirect
2023-02-22	Common Stock	J	384000	$25.28	Acquired	70561857	Indirect
2023-02-22	Common Stock	J	384000	$25.28	Acquired	70945857	Indirect
2023-02-22	Common Stock	J	384000	$25.28	Acquired	71329857	Indirect
2023-02-22	Common Stock	A	59477	$0.00	Acquired	71389334	Indirect
2023-02-22	Common Stock	F	25267	$25.28	Disposed	71364067	Indirect
2023-02-24	Common Stock	M	2599	$0.00	Acquired	71366666	Indirect
2023-02-24	Common Stock	F	1053	$25.27	Disposed	71365613	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2023-02-24	Restricted Stock Units	$0.00	M	2599	Disposed		Common Stock (2599)	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	3278001	Direct

Footnotes

F1: On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Alexandra Kim Panichello dated 12/24/92 sold 384,000 shares of Common Stock of Amkor Technology, Inc. (the "Issuer") to James J. Kim in full payment of the principal and accrued interest of a note payable to Mr. Kim by such trust. Mr. Kim is the spouse of the Reporting Person. This transaction is exempt pursuant to Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), and is voluntarily reported.

F2: James J. Kim is the spouse of the Reporting Person. The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities,
except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16, or for any other purpose.

F3: On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Allyson Lee Kim dated 10/15/01 sold 384,000 shares of the Issuer's Common Stock to James J. Kim in full payment of the principal and accrued interest of a note payable to Mr. Kim by such trust. Mr. Kim is the spouse of the Reporting Person. This transaction is exempt pursuant to Section 16 and is voluntarily reported.

F4: On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Dylan James Panichello dated 10/15/01 sold 384,000 shares of the Issuer's Common Stock to James J. Kim in full payment of the principal and accrued interest of a note payable to Mr. Kim by such trust. Mr. Kim is the spouse of the Reporting Person. This transaction is exempt pursuant to Section 16 and is voluntarily reported.

F5: On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Jacqueline Mary Panichello dated 10/3/94 sold 384,000 shares of the Issuer's Common Stock to James J. Kim in full payment of the principal and accrued interest of a note payable to Mr. Kim by such trust. Mr. Kim is the spouse of the Reporting Person. This transaction is exempt pursuant to Section 16 and is voluntarily reported.

F6: On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim, Settlor, FBO Jason Lee Kim dated 11/17/03 sold 384,000 shares of the Issuer's Common Stock to James J. Kim in full payment of the principal and accrued interest of a note payable to Mr. Kim by such trust. Mr. Kim is the spouse of the Reporting Person. This transaction is exempt pursuant to Section 16 and is voluntarily reported.

F7: This Form 4 reports the vesting on February 22, 2023 of 59,477 shares of the Issuer's Common Stock underlying performance-vested restricted stock units ("PSUs") granted to the spouse of 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.

F8: The transaction represents shares of the Issuer's Common Stock withheld by the Issuer in connection with the vesting of PSUs to satisfy the tax withholding obligations of the Reporting Person's spouse. The Issuer will pay these taxes on behalf of the Reporting Person's spouse.

F9: On February 24, 2022 (the "RSU Grant Date"), the Reporting Person's spouse was granted 10,748 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.

F10: The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the spouse of the
Reporting Person on the RSU Grant Date. These shares were withheld to satisfy the tax withholding obligations of the Reporting Person's spouse. The Issuer will pay these taxes on behalf of the Reporting Person's spouse.