[Form 4] AMKOR TECHNOLOGY, INC. Insider Trading Activity

Amkor Technology (AMKR) reported an insider transaction on 11/04/2025.

Rhea-AI Filing Summary

Amkor Technology (AMKR) reported an insider transaction on 11/04/2025. The reporting person distributed 806,000 shares of common stock to John T. Kim under transaction code G at a stated price of $0, which denotes a gift or similar transfer. The filing explains this was a mere change in the form of ownership from indirect to direct because Mr. Kim is the annuitant and sole trustee of the reporting person.

Following the transaction, the reporting person beneficially owned 1,194,000 shares directly. This entry reflects an ownership reclassification rather than an open‑market sale.

Insider Trade Summary

806,000 shares gifted

Gift 1 txn

Insider John T. Kim 2024 GRAT #1 dtd. 08/09/2024

Role Insider

Type	Security	Shares	Price	Value
Gift	Common Stock	806,000	$0.00	$0.00

Holdings After Transaction: Common Stock — 1,194,000 shares (Direct)

Footnotes (1)

1. F1. On November 4, 2025, the Reporting Person distributed 806,000 shares of the Common Stock of Amkor Technology, Inc (the "Issuer") to John T. Kim. John T. Kim is the sole trustee of the Reporting Person. Because John. T. Kim is the annuitant and sole trustee of the Reporting Person, the distribution was a mere change in the form of ownership from indirect to direct and thus being voluntarily reported by the Reporting Person on this Form 4.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Amkor (AMKR) disclose in this Form 4?

An insider distributed 806,000 shares of common stock to John T. Kim on 11/04/2025 under code G at a stated price of $0.

What does transaction code G mean for AMKR?

Code G indicates a gift or similar transfer, aligning with the reported $0 price.

How many AMKR shares are beneficially owned after the transaction?

The reporting person beneficially owned 1,194,000 shares directly following the transaction.

Was this an open-market sale of AMKR stock?

No. The filing describes a change in the form of ownership from indirect to direct, not an open‑market sale.

Who received the distributed shares?

John T. Kim received 806,000 shares of Amkor Technology, Inc. common stock.

Does the filing claim beneficial ownership of group-held securities?

No. It states the filing shall not be deemed an admission of beneficial ownership of securities owned by other group members.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 11/06/2025 - 06:27 PM Learn about SEC filing dates

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).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

John T. Kim 2024 GRAT #1 dtd. 08/09/2024

(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)

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			Member of 10% owner group

3. Date of Earliest Transaction (Month/Day/Year)
11/04/2025

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

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	11/04/2025		G		806,000	D	$0	1,194,000(1)	D

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

Explanation of Responses:

1. On November 4, 2025, the Reporting Person distributed 806,000 shares of the Common Stock of Amkor Technology, Inc (the "Issuer") to John T. Kim. John T. Kim is the sole trustee of the Reporting Person. Because John. T. Kim is the annuitant and sole trustee of the Reporting Person, the distribution was a mere change in the form of ownership from indirect to direct and thus being voluntarily reported by the Reporting Person on this Form 4.

Remarks:

(2) 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	11/06/2025
	** 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.