Amkor director receives dividend-linked RSUs

Amkor Technology director Roger Anthony Carolin reported routine equity compensation adjustments tied to dividends.

Rhea-AI Filing Summary

Amkor Technology director Roger Anthony Carolin reported routine equity compensation adjustments tied to dividends. On March 31, 2026, he acquired 15.7246 restricted stock units as dividend equivalent units on time-vested RSUs granted on May 16, 2023, and 18.1563 units on RSUs granted on May 15, 2025. After these grants, his directly held RSU-based interest increased to 9,893.0573 units, all representing future rights to Amkor common stock, subject to the same vesting terms as the original RSU awards.

Insider Trade Summary

Grant/Award: 33.8809 shares

Grant/Award 2 txns

Insider Carolin Roger Anthony

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	15.7246	$0.00	$0.00
Grant/Award	Restricted Stock Units	18.1563	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 18,788.8454 contracts (Direct)

Footnotes (2)

1. F1. Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on March 31, 2026 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. F2. Represents DEUs accrued upon the payment of a dividend on March 31, 2026 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.

Key Figures

RSUs granted from 2023 award DEUs: 15.7246 units RSUs granted from 2025 award DEUs: 18.1563 units RSU-based holdings after transactions: 9,893.0573 units +1 more

4 metrics

RSUs granted from 2023 award DEUs 15.7246 units Dividend equivalent units credited on March 31, 2026 for May 16, 2023 RSUs

RSUs granted from 2025 award DEUs 18.1563 units Dividend equivalent units credited on March 31, 2026 for May 15, 2025 RSUs

RSU-based holdings after transactions 9,893.0573 units Total restricted stock units directly held following March 31, 2026 credits

Transaction price per RSU $0.0000 Grant/award acquisitions recorded with no per-unit purchase price

Key Terms

dividend equivalent units, Restricted Stock Units, time-vested restricted stock units, grant/award acquisition

4 terms

dividend equivalent units financial

"Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on March 31, 2026"

Dividend equivalent units are bookkeeping credits that mirror cash dividends paid on actual shares, granted to holders of stock-based awards such as restricted stock units or deferred compensation. They matter to investors because they increase a company’s reported employee compensation cost and can lead to issuance of more shares or cash payouts over time, similar to extra pay linked to ownership that affects shareholder dilution and corporate cash flow.

Restricted Stock Units financial

"Represents dividend equivalent units ("DEUs") accrued ... with respect to time-vested restricted stock units ("RSUs")"

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.

time-vested restricted stock units financial

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

grant/award acquisition financial

"transaction_action": "grant/award acquisition""

FAQ

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

What insider transactions did Amkor (AMKR) report for Roger Anthony Carolin?

Amkor director Roger Anthony Carolin reported acquiring dividend-linked restricted stock units on March 31, 2026. These grants arose as dividend equivalent units on prior RSU awards from 2023 and 2025, increasing his RSU-based interest without any open-market share purchases or sales.

How many restricted stock units did the Amkor (AMKR) director receive?

He received 15.7246 restricted stock units tied to a May 16, 2023 RSU grant and 18.1563 units tied to a May 15, 2025 grant. Each dividend equivalent unit represents an additional RSU under the same vesting conditions as the original awards.

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

Dividend equivalent units are additional restricted stock units credited when a cash dividend is paid. In this case, Amkor credited DEUs on March 31, 2026 to mirror dividends on existing time-vested RSUs, with each DEU functioning as one more RSU under the same terms.

Did the Amkor (AMKR) director buy or sell common stock in the market?

The Form 4 does not show any open-market buying or selling. It reports only grant-type acquisitions of restricted stock units as dividend equivalent units, with no reported market transactions in Amkor common stock associated with this specific disclosure.

What is the Amkor (AMKR) director’s RSU position after the reported grants?

Following the March 31, 2026 dividend equivalent unit credits, the director’s total directly held restricted stock units increased to 9,893.0573 units. These RSUs represent future rights to Amkor common stock, subject to the original vesting and award provisions.

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

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Accepted by SEC EDGAR 04/02/2026 - 06:51 PM Learn about SEC filing dates

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^*

Carolin Roger Anthony

(Last) (First) (Middle)

7 GREAT VALLEY PARKWAY,

SUITE 190

(Street)

MALVERN PENNSYLVANIA 19355

(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)
03/31/2026

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)	03/31/2026		A		15.7246		(1)	(1)	Common Stock	15.7246	$0	8,895.7881	D
Restricted Stock Units	(2)	03/31/2026		A		18.1563		(2)	(2)	Common Stock	18.1563	$0	9,893.0573	D

Explanation of Responses:

1. Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on March 31, 2026 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 March 31, 2026 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:

	/s/ Mark N. Rogers, Attorney-in-Fact for Roger A. Carolin	04/02/2026
	** 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)