Sung Shin - Feb 16, 2023 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Role: Executive Vice President
Signature: Mark N. Rogers, Attorney-in-Fact for Sung Shin
Stock symbol: AMKR
Transactions as of: Feb 16, 2023
Transactions value $: $0
Form type: 4
Date filed: 2/21/2023, 04:32 PM
Previous filing: Feb 25, 2022
Next filing: Feb 24, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	AMKR	Common Stock						1.63K	Feb 16, 2023	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	Restricted Stock Units	Award	$0	+3.25K		$0.00	3.25K	Feb 16, 2023	Common Stock	3.25K		Direct	F3
holding	AMKR	Restricted Stock Units						1.63K	Feb 16, 2023	Common Stock			Direct	F1
holding	AMKR	Restricted Stock Units						3.76K	Feb 16, 2023	Common Stock			Direct	F2

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

Explanation of Responses:

Id	Content
F1	As previously reported in a Form 3 filed by the Reporting Person on March 17, 2021 (the "Form 3"), on February 11, 2021 (the "2021 Grant Date"), 3,268 shares of Amkor Technology, Inc. (the "Issuer") common stock underlying time-vested restricted stock units (the "2021 RSUs") were granted to the Reporting Person. The 2021 RSUs vest in four equal annual installments beginning on the first anniversary of the 2021 Grant Date. In the Form 3 and in subsequent Forms 4 filed by the Reporting Person, the 2021 RSUs were incorrectly reported in Table I. On February 10, 2023, 817 of the 2021 RSUs vested, and such vested RSUs are properly reported in Table I of this Form 4. Table I, Column 5 and Table II, Column 9 of this Form 4 have been adjusted to include the remaining vested and unvested 2021 RSUs, respectively, and reflect the proper number of 2021 RSUs beneficially owned by the Reporting Person as of the filing of this Form 4.
F2	As previously reported in a Form 4 filed by the Reporting Person on February 25, 2022 (the "Original Form 4"), on February 24, 2022 (the "2022 Grant Date"), 3,761 shares of the Issuer's common stock underlying time-vested restricted stock units (the "2022 RSUs") were granted to the Reporting Person. The 2022 RSUs vest in four equal annual installments beginning on the first anniversary of the 2022 Grant Date. In the Original Form 4, the 2022 RSUs were incorrectly reported in Table I. Table II, Column 9 of this Form 4 has been adjusted to include the 2022 RSUs and reflects the proper number of 2022 RSUs beneficially owned by the Reporting Person as of the filing of this Form 4.
F3	Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 16, 2023 (the "2023 Grant Date") pursuant to the Issuer's 2021 Equity Incentive Plan (the "2023 RSUs"). The 2023 RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the 2023 Grant Date.