Amkor director gets RSU dividend credit awards

Amkor Technology director Douglas A. Alexander received additional restricted stock units through dividend credits rather than market purchases.

Rhea-AI Filing Summary

Amkor Technology director Douglas A. Alexander received additional restricted stock units through dividend credits rather than market purchases. On March 31, 2026, he was granted three small blocks of dividend equivalent units tied to earlier RSU awards from 2022, 2023, and 2025. Each dividend equivalent unit converts into an additional RSU subject to the same vesting and other conditions as the original grants, modestly increasing his equity-based compensation while leaving cash holdings unchanged.

Insider Trade Summary

Grant/Award: 50.0286 shares

Grant/Award 3 txns

Insider ALEXANDER DOUGLAS A

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	16.1477	$0.00	$0.00
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 — 28,027.277 contracts (Direct)

Footnotes (3)

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 17, 2022. 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 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.
3. F3. 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

Dividend equivalent units on 2022 RSUs: 16.1477 units Dividend equivalent units on 2023 RSUs: 15.7246 units Dividend equivalent units on 2025 RSUs: 18.1563 units

3 metrics

Dividend equivalent units on 2022 RSUs 16.1477 units DEUs credited on March 31, 2026 to May 17, 2022 RSU grant

Dividend equivalent units on 2023 RSUs 15.7246 units DEUs credited on March 31, 2026 to May 16, 2023 RSU grant

Dividend equivalent units on 2025 RSUs 18.1563 units DEUs credited on March 31, 2026 to May 15, 2025 RSU grant

Key Terms

Restricted Stock Units, dividend equivalent units, time-vested restricted stock units, RSUs, +1 more

5 terms

Restricted Stock Units financial

"security_title: Restricted Stock Units; underlying_security_title: 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 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.

time-vested restricted stock units financial

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

RSUs financial

"Each DEU represents an additional RSU subject to the same provisions as the RSU"

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

Grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

FAQ

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

What insider transaction did Amkor (AMKR) director Douglas A. Alexander report?

Douglas A. Alexander reported receiving additional restricted stock units as dividend equivalent units on March 31, 2026. These awards are linked to prior RSU grants and increase his stock-based compensation without involving any open-market share purchases or sales.

Were the Amkor (AMKR) Form 4 transactions open-market buys or sells?

The transactions were not open-market buys or sells. They were coded as awards, reflecting dividend equivalent units credited on existing RSUs. No cash changed hands and there were no market trades affecting Amkor’s share float in this filing.

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

Dividend equivalent units are credits that mirror cash dividends on existing RSUs. For Amkor, each DEU represents an additional RSU subject to the same vesting and terms as the original RSU grant, slightly increasing the director’s potential future share ownership.

Which prior Amkor (AMKR) RSU grants generated these new dividend units?

The dividend equivalent units relate to time-vested RSUs granted on May 17, 2022, May 16, 2023, and May 15, 2025. When Amkor paid a dividend on March 31, 2026, these earlier RSU awards accrued additional RSUs through the DEU mechanism.

Does this Amkor (AMKR) Form 4 indicate a significant change in insider ownership?

The Form 4 shows small incremental RSU awards rather than large trades. The additional units modestly increase Douglas A. Alexander’s equity-based compensation, but the amounts are limited and arise automatically from the company’s dividend on existing RSU grants.

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

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Accepted by SEC EDGAR 04/02/2026 - 06:49 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^*

ALEXANDER DOUGLAS A

(Last) (First) (Middle)

2045 EAST INNOVATION CIRCLE

(Street)

TEMPE ARIZONA 85284

(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		16.1477		(1)	(1)	Common Stock	16.1477	$0	9,238.4316	D
Restricted Stock Units	(2)	03/31/2026		A		15.7246		(2)	(2)	Common Stock	15.7246	$0	8,895.7881	D
Restricted Stock Units	(3)	03/31/2026		A		18.1563		(3)	(3)	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 17, 2022. 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 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

3. 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 Douglas A. Alexander	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)