AMKOR director granted additional RSU dividend units

CHURCHILL WINSTON J reported acquisition or exercise transactions in this Form 4 filing.

Accepted by SEC EDGAR 06/25/2026 - 04:39 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

CHURCHILL WINSTON J reported acquisition or exercise transactions in this Form 4 filing.

AMKOR TECHNOLOGY, INC. director Winston J. Churchill reported a small compensation-related equity change. He received 2.5166 dividend equivalent units in the form of restricted stock units, linked to a dividend paid on June 23, 2026 and tied to existing time-vested RSUs granted on May 13, 2026. Following this award, his directly held restricted stock unit balance increased to 2,615.5166 units, each representing one share of common stock when vested.

Insider Trade Summary

Grant/Award: 2.5166 shares

Grant/Award 1 txn

Insider CHURCHILL WINSTON J

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	2.5166	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 2,615.5166 contracts (Direct)

Holdings Before and After: Restricted Stock Units, 2,613 to 2,615.5166 contracts (Direct)

Footnotes (1)

1. F1. Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 23, 2026 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

Key Figures

RSUs granted: 2.5166 units Total RSUs after transaction: 2,615.5166 units Grant price per unit: $0.0000 +1 more

4 metrics

RSUs granted 2.5166 units Dividend equivalent units credited June 23, 2026

Total RSUs after transaction 2,615.5166 units Directly held restricted stock units following grant

Grant price per unit $0.0000 Compensation-related RSU grant, not a market purchase

Underlying common stock 2.5166 shares Shares of common stock underlying the new RSUs

Key Terms

Restricted Stock Units, dividend equivalent units ("DEUs"), time-vested restricted stock units ("RSUs"), Grant, award, or other acquisition

4 terms

Restricted Stock Units financial

"The security title is listed as "Restricted Stock Units" with underlying common stock."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

dividend equivalent units ("DEUs") financial

"Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 23, 2026."

time-vested restricted stock units ("RSUs") financial

"With respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc."

Grant, award, or other acquisition financial

"Transaction code description is "Grant, award, or other acquisition" for this RSU entry."

FAQ

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

What insider transaction did Winston J. Churchill report for AMKR?

Winston J. Churchill reported receiving 2.5166 restricted stock units as dividend equivalent units. These units were credited in connection with a dividend paid on June 23, 2026 and are tied to previously granted time-vested RSUs from May 13, 2026.

Is the AMKR Form 4 transaction a market purchase or sale?

The AMKR Form 4 transaction is not a market trade; it is a grant. Churchill acquired 2.5166 restricted stock units as a compensation-related award, credited as dividend equivalent units rather than through open-market buying or selling of AMKOR common shares.

How many restricted stock units does Winston J. Churchill hold after this AMKR transaction?

After this transaction, Winston J. Churchill holds 2,615.5166 restricted stock units directly. Each unit represents one share of AMKOR common stock upon vesting, and this total includes the 2.5166 dividend equivalent units granted on June 23, 2026.

What are dividend equivalent units (DEUs) in the AMKR Form 4 filing?

Dividend equivalent units in this filing are additional RSUs credited when AMKOR pays a dividend. Each DEU represents one extra restricted stock unit, subject to the same time-vesting provisions as the original RSUs granted to Winston J. Churchill on May 13, 2026.

What type of security is involved in Winston J. Churchill’s AMKR Form 4?

The security is restricted stock units linked to AMKOR common stock. Churchill received 2.5166 additional units as a grant, bringing his directly held RSU balance to 2,615.5166 units, all subject to the original RSU award’s vesting conditions and terms.

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

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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^*

CHURCHILL WINSTON J

(Last) (First) (Middle)

500 SE MIZNER BLVD.

APT 305A

(Street)

BOCA RATON FLORIDA 33432-6083

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/23/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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)	06/23/2026		A		2.5166		(1)	(1)	Common Stock	2.5166	$0	2,615.5166	D

Explanation of Responses:

1. Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 23, 2026 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 13, 2026. 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 Winston J. Churchill	06/25/2026
	** 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.
* Form 4: SEC 1474 (03-26)