[Form 4] Amkor Technology Inc Insider Trading Activity

Rhea-AI Filing Summary

Amkor Technology, Inc. (AMKR) – Form 4 insider filing (31 July 2025): Director and officer Agnes C. Kim reported receiving 1,738,000 AMKR common shares on 30 Jul 2025 via distribution from her 2023 Grantor Retained Annuity Trust (Code G – gift/GRAT distribution). Her direct ownership rose to 1,833,000 shares.

In a parallel GRAT distribution, 2,711,000 shares were transferred to Ms. Kim’s spouse, James J. Kim; she reports indirect beneficial ownership of 12,731,870 shares held by the spouse.

No cash consideration was paid ($0 price), and no shares were sold. The filing reflects internal family estate-planning transfers rather than open-market buying. Nonetheless, the Kim family’s aggregate stake increased in reported direct holdings, reinforcing its sizable insider position.

Positive

• No shares were sold; transactions increase reported direct and indirect insider holdings.
• 4.45 million shares added to Kim family’s disclosed stake, underscoring long-term alignment with shareholders.

Negative

• Transfers are GRAT distributions, not open-market purchases, so they do not represent new capital commitment.
• Event is estate-planning driven and may have limited signaling value for operating outlook.

Insights

Senior Securities Analyst

TL;DR: Large GRAT distributions add 4.45 m shares to Kim family’s reported holdings; no selling pressure signaled.

The Kim family, long-time controlling insiders, shifted 1.74 m shares to Agnes C. Kim and 2.71 m shares to spouse James J. Kim. Because the transfers are coded “G,” they stem from pre-established estate-planning GRATs, not market purchases, so they don’t convey incremental cash commitment. Still, the absence of dispositions implies neutral-to-slightly-positive sentiment: insiders are not selling and remain heavily invested (≈14.6 m shares combined). For liquidity-watchers, the move does not add float and should have minimal near-term price impact.

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^*

KIM AGNES C

(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)
07/30/2025

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	07/30/2025		G		1,738,000	A	$0	1,833,000(1)	D
Common Stock	07/30/2025		G		2,711,000	A	$0	12,731,870(2)	I	By Spouse

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 July 30, 2025, the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 1,738,000 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") to the Reporting Person.

2. On July 30, the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 2,711,000 of the Issuer's Common Stock to James J. Kim, the spouse 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, or for any other purpose.

	/s/ Brian D. Short, Attorney-in-Fact for Agnes C. Kim	08/01/2025
	** 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.

FAQ

How many AMKR shares did Agnes C. Kim acquire?

1,738,000 shares were distributed to her directly on 30 Jul 2025.

What is Agnes C. Kim’s total direct ownership after the transaction?

She now directly owns 1,833,000 AMKR shares.

How many shares does she indirectly own through her spouse?

She reports indirect beneficial ownership of 12,731,870 shares held by James J. Kim.

Was any cash paid for the shares?

No. The transactions are coded G (gift/GRAT) with a $0 price.

Does the filing indicate insider buying or selling?

Neither; it reflects estate-planning transfers with no sales into the market.