SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* KIM SUSAN Y (Last) (First) (Middle) C/O SIANA CARR O'CONNOR & LYNAM 1500 EAST LANCASTER AVENUE (Street) PAOLI PA 19301-9713 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol AMKOR TECHNOLOGY, INC. [ AMKR ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner Officer (give title below) X Other (specify below) Member of 10% owner group (8)
	3. Date of Earliest Transaction (Month/Day/Year) 09/25/2023
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person
	Rule 10b5-1(c) Transaction Indication Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock								5,266,234(1)	D
Common Stock								5,117,004(2)(3)(4)	I	By James J. Kim 2023 GRAT dtd. 4/26/23
Common Stock								3,278,001(2)(3)(4)	I	By Agnes C. Kim 2023 GRAT dtd. 4/26/23
Common Stock								1,867,747(2)(3)(4)	I	By James J. Kim 2021 GRAT dtd. 12/15/21
Common Stock								2,660,840(2)(3)(4)	I	By Agnes C. Kim 2020-1 GRAT dtd. 12/16/20
Common Stock								3,879,943(1)(2)(3)(4)(5)	I	By own GRATs
Common Stock								9,718,085(2)(3)(4)(5)	I	By trusts (excl. GRATs)
Common Stock								19,484,809(2)(3)(4)	I	By Sujochil, LP
Common Stock								2,478,325(2)(3)(4)(6)	I	By Sujoda Investments, LP
Common Stock								8,200,000(2)(3)(4)	I	By LLCs treated as corporations

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(7)	09/25/2023		A		28.3988(7)		(7)	(7)	Common Stock	28.3988(7)	$0.00	8,530.5206	D

Explanation of Responses:

1. Reflects the Reporting Person's distribution of 2,500,000 shares of Common Stock of Amkor Technology, Inc. (the "Issuer") to the 2023 Grantor Retained Annuity Trust of Susan Y. Kim dated 9/15/23 (the "SYK 2023 GRAT") on September 15, 2023. Because the Reporting Person is the annuitant and sole trustee of the SYK 2023 GRAT, such distribution was a mere change in the form of ownership from direct to indirect and hence not reportable by the Reporting Person on a Form 4.

2. 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 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for any other purpose.

3. The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts ("GRATs")) which own 9,718,085 shares of the Issuer's Common Stock, (ii) a trustee of GRATs for the benefit of members of her immediate family which own 12,923,592 shares of the Issuer's Common Stock, (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,879,943 shares of the Issuer's Common Stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock,

4. (Continued from Footnote 3) (v) a manager of limited liability companies being treated as corporations for purposes of Section 16, which own 8,200,000 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 6, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares.

5. Reflects the distribution of 1,958,355 shares of the Issuer's Common Stock by the Qualified Annuity Trust under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement dated 4/1/20 (the "SYK 2020-1 GRAT") to the Family Trust under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement dated 4/1/20 (the "SYK 2020-1 Family Trust") on September 14, 2023. The Reporting Person and James J. Kim are co-trustees of the SYK 2020-1 GRAT and SYK 2020-1 Family Trust. Because the Reporting Person is a trustee of the SYK 2020-1 GRAT and SYK 2020-1 Family Trust, such distribution was not reportable by the Reporting Person on a Form 4.

6. The sole general partner of Sujoda Investments, LP is Sujoda Management, LLC. The Reporting Person is one of three members of Sujoda Management, LLC. Sujoda Management, LLC is being treated as a limited partnership for purposes of Section 16, and, pursuant to the Form 4 instructions, the Reporting Person has elected to treat all of the shares of the Issuer's common stock owned by Sujoda Investments, LP as beneficially owned by the Reporting Person.

7. Represents dividend equivalent units ("DEUs") accrued with respect to time-vested restricted stock units ("RSUs") of the Issuer upon the Issuer's payment of a dividend on September 25, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

Remarks:

(8) The Reporting Person states that the filing of this Form 4 shall not be deemed an admission that the Reporting Person is the beneficial owner of the reported securities owned by the other members of the group, for the purpose of Section 16 or for any other purpose.

	/s/ Brian D. Short, Attorney-in-Fact for Susan Y. Kim	09/27/2023
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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