[Form 4] Amkor Technology Inc Insider Trading Activity

Rhea-AI Filing Summary

Amkor Technology, Inc. (AMKR) – Form 4 insider filing

Director Robert R. Morse reported two automatic equity adjustments on 06/25/2025. No open-market trades occurred. Instead, the company issued dividend equivalent units (DEUs) that convert into additional restricted stock units (RSUs):

• 33.3674 RSUs credited under the May 16 2023 grant, raising that award to 8,839.034 RSUs.
• 38.5269 RSUs credited under the May 15 2025 grant, lifting that award to 9,827.5269 RSUs.

The DEUs were issued at $0 cost and carry the same vesting terms as the underlying RSUs. Morse’s ownership increased by 71.8943 derivative shares in total, signaling routine dividend-linked adjustments rather than discretionary purchases or sales.

Insights

Securities Analyst

TL;DR: Routine Form 4; director received 72 dividend RSUs, no cash outlay, minimal market impact.

The filing reflects mechanical accrual of dividend equivalent units, a common feature of Amkor’s equity plans. Because the RSUs vest on existing schedules and involve no open-market transaction, the disclosure is administrative rather than strategic. Share count dilution is immaterial (≈0.00003% of AMKR’s 245 M basic shares). Investors should view this as neutral housekeeping that maintains alignment between dividend payments and outstanding equity awards.

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^*

Morse Robert Randolph

(Last) (First) (Middle)

2045 EAST 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)
06/25/2025

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)	06/25/2025		A		33.3674		(1)	(1)	Common Stock	33.3674	$0	8,839.034	D
Restricted Stock Units	(2)	06/25/2025		A		38.5269		(2)	(2)	Common Stock	38.5269	$0	9,827.5269	D

Explanation of Responses:

1. Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 25, 2025 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

2. Represents DEUs accrued upon the payment of a dividend on June 25, 2025 with respect to 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:

	Mark N. Rogers, Attorney-in-Fact for Robert R. Morse	06/27/2025
	** 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 shares did AMKR director Robert R. Morse acquire on 06/25/2025?

He received 71.8943 dividend equivalent RSUs (33.3674 + 38.5269) at no cost.

Was there any open-market purchase or sale by the insider in this Form 4?

No. The filing reports automatic dividend equivalent units, not cash transactions.

What is the total RSU balance Morse now holds from the 2023 grant?

After the credit, the 2023 grant totals 8,839.034 RSUs.

Do the new RSUs have the same vesting schedule as prior awards?

Yes. Each DEU follows the same provisions and vesting terms as the underlying RSU grant.

Is this Form 4 likely to affect AMKR’s share price?

Impact is expected to be negligible; the dilution is immaterial and involves no cash trade.