Amkor Trust Transfers 560k Shares to Beneficiaries in Form 4 Gift

Rhea-AI Filing Summary

Form 4 highlight: On 01-Aug-2025 the "2023 Grantor Retained Annuity Trust of Agnes C. Kim" executed two Code G (bona-fide gift) transactions involving Amkor Technology (AMKR) common stock.

• Gifted 280,000 shares to Susan Y. Kim.
• Gifted 280,001 shares to John T. Kim.

No cash consideration was received (price $0). The trust’s direct beneficial ownership fell from 560,001 shares to zero. The filing states that the trust does not concede beneficial ownership of shares now held by other group members.

Because the transfers are intra-family gifts rather than open-market sales, trading supply is unchanged. Still, investors may note that one insider vehicle has fully exited its direct position, marginally reducing reported insider ownership.

Positive

• None.

Negative

• Trust reduced its direct AMKR holdings by 560,001 shares, eliminating its stake

Insights

Securities Analyst

TL;DR Intra-family gifts; trust exits 560 k-share stake, minimal market impact.

The transactions are classified under Code G, confirming they are non-market gifts at $0. Although 560,001 shares represent roughly 0.23 % of AMKR’s outstanding shares, the lack of sale pressure means limited short-term price effect. The trust’s exit does, however, reduce the aggregate reported insider position, which some investors track for sentiment. Overall impact is neutral.

Corporate Governance Specialist

TL;DR Estate-planning move; ownership shifts but governance control unchanged.

The shares move from a GRAT to beneficiaries while remaining under the Kim family sphere; Susan Y. Kim is both recipient and sole trustee. There is no implication of strategic disagreement or loss of board influence. Disclosure language preserves distance regarding group beneficial ownership, a standard legal safeguard. Governance risk appears unchanged; materiality to outside shareholders is low.

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

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X

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^*

2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023

(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)

3. Date of Earliest Transaction (Month/Day/Year)
08/01/2025

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	08/01/2025		G		280,000	D	$0	280,001(1)	D
Common Stock	08/01/2025		G		280,001	D	$0	0(2)	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 August 1, 2025, the Reporting Person distributed 280,000 shares of the Common Stock of Amkor Technology, Inc (the "Issuer") to Susan Y. Kim. Susan Y. Kim is the sole trustee of the Reporting Person.

2. On August 1, 2025, the Reporting Person distributed 280,001 shares of the Common Stock of the Issuer to John T. Kim. Susan Y. Kim is the sole trustee of the Reporting Person.

Remarks:

(3) 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 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

	/s/ Brian D. Short, Attorney-in-Fact	08/05/2025
	** 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.
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FAQ

How many AMKR shares were transferred in the 1-Aug-2025 Form 4 filing?

A total of 560,001 shares were gifted by the trust.

What transaction code was used in the AMKR insider filing?

The filing lists transaction code G, indicating a bona-fide gift.

Was any cash consideration involved in the share transfer?

No. The shares were transferred at a stated price of $0.

How many AMKR shares does the reporting trust hold after the transaction?

Post-transfer, the trust reports 0 direct shares.

Who received the gifted AMKR shares?

Susan Y. Kim received 280,000 shares and John T. Kim received 280,001 shares.