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

Rhea-AI Filing Summary

John D. Liu, a director of Amkor Technology, Inc. (AMKR), reported a non‑derivative acquisition on 09/23/2025 of 27.3648 restricted stock units (RSUs) recorded as dividend equivalent units (DEUs) related to time‑vested RSUs granted on May 15, 2025. The DEUs accrued upon a dividend payment and carry the same terms as the underlying RSUs. The reported price for the DEUs was $0 and the filing shows 9,854.8917 shares beneficially owned following the transaction. The Form 4 was signed by an attorney‑in‑fact on 09/25/2025.

Insights

Financial Analyst

TL;DR: Minor insider accumulation via dividend equivalents; no material change to ownership stake.

The report documents the accrual of 27.3648 DEUs to an existing RSU position, recorded at $0 as dividend equivalents. For an investor assessing ownership trends, the incremental addition is negligible relative to the total reported beneficial ownership of 9,854.8917 shares and does not indicate a substantive change in insider exposure or signaling of a new compensation arrangement beyond the May 15, 2025 grant.

Corporate Governance Expert

TL;DR: Routine disclosure of dividend equivalent units on time‑vested RSUs; governance impact is minimal.

The Form 4 properly discloses DEUs credited upon a dividend payment and ties them to the May 15, 2025 RSU grant. Filing by an attorney‑in‑fact is acceptable and the disclosure meets Section 16 requirements. There is no indication of unusual compensation terms or accelerated vesting in this filing.

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
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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^*

LIU JOHN D

(Last) (First) (Middle)

2045 E INNOVATION CIRCLE

(Street)

TEMPE AZ 85284

(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		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
09/23/2025

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

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	(1)	09/23/2025		A		27.3648		(1)	(1)	Common Stock	27.3648	$0	9,854.8917	D

Explanation of Responses:

1. Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2025 with respect to time-vested restricted stock units ("RSUs") of the Issuer granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

Remarks:

	/s/ Mark N. Rogers, Attorney-in-Fact for John D. Liu	09/25/2025
	** 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

What did John D. Liu report on the Form 4 for AMKR?

He reported acquiring 27.3648 RSUs as dividend equivalent units on 09/23/2025 related to time‑vested RSUs granted May 15, 2025.

How many shares does John D. Liu beneficially own after the transaction?

9,854.8917 shares are reported as beneficially owned following the DEU accrual.

Was there a purchase price associated with the reported DEUs?

No purchase price is reported; the DEUs are recorded with a price of $0 as dividend equivalents.

When was the Form 4 signed and who signed it?

Signed by Mark N. Rogers, Attorney‑in‑Fact for John D. Liu on 09/25/2025.

Are the DEUs tied to any specific RSU grant?

Yes; the DEUs were accrued with respect to time‑vested RSUs granted to the reporting person on May 15, 2025 and carry the same provisions as those RSUs.