Amkor director adds RSUs via dividend equivalents

AMKOR TECHNOLOGY, INC. director Robert Randolph Morse reported routine equity compensation adjustments tied to dividends.

Rhea-AI Filing Summary

AMKOR TECHNOLOGY, INC. director Robert Randolph Morse reported routine equity compensation adjustments tied to dividends. On March 31, 2026, he acquired 15.7246 dividend equivalent units and 18.1563 dividend equivalent units, each representing additional restricted stock units linked to prior time-vested RSU grants.

These dividend equivalent units convert into the same number of common shares when the underlying RSUs vest, under the same terms as the original awards. After these grants, Morse directly holds 9,893.0573 restricted stock units in total, reflecting ongoing stock-based compensation rather than any market purchase or sale.

Insider Trade Summary

Grant/Award: 33.8809 shares

Grant/Award 2 txns

Insider Morse Robert Randolph

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

Dividend-equivalent RSUs from 2023 grant: 15.7246 units Dividend-equivalent RSUs from 2025 grant: 18.1563 units Total RSUs held after transactions: 9,893.0573 units

3 metrics

Dividend-equivalent RSUs from 2023 grant 15.7246 units Credited on March 31, 2026 as dividend equivalent units

Dividend-equivalent RSUs from 2025 grant 18.1563 units Credited on March 31, 2026 as dividend equivalent units

Total RSUs held after transactions 9,893.0573 units Direct restricted stock unit holdings after March 31, 2026 grants

Key Terms

Restricted Stock Units, dividend equivalent units, time-vested, RSUs

4 terms

Restricted Stock Units financial

"Represents dividend equivalent units accrued with respect to time-vested restricted stock units"

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"

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 financial

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

Time-vested describes a right—such as stock options, restricted shares, or pension benefits—that becomes fully owned by an individual only after they have waited for or worked through a specified period. For investors, it matters because these delayed ownership rules affect when insiders or employees can sell shares, which influences share supply, executive incentives, and the timing of potential stock dilution or insider-driven stock sales.

RSUs financial

"with respect to RSUs of the Issuer granted to the Reporting Person on May 15, 2025"

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.

FAQ

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

What insider transaction did AMKR director Robert Morse report on this Form 4?

Robert Morse reported acquiring additional restricted stock units through dividend equivalents. On March 31, 2026, he received two small grants tied to earlier RSU awards, reflecting routine stock-based compensation adjustments rather than open-market buying or selling of Amkor Technology shares.

How many restricted stock units did Robert Morse gain in the latest AMKR Form 4?

Morse gained 33.8809 restricted stock units in total. This consists of 15.7246 units from dividend equivalents on a 2023 RSU grant and 18.1563 units from dividend equivalents on a 2025 RSU grant, each representing future Amkor common shares when the awards vest.

What are dividend equivalent units (DEUs) in the context of AMKR RSUs?

Dividend equivalent units are additional RSUs credited when a company pays dividends. For Amkor, each DEU gives Morse one more restricted stock unit with the same vesting terms as the original RSUs, so his equity position grows in line with dividends without cash changing hands.

How many restricted stock units does Robert Morse hold after this AMKR filing?

After these dividend-equivalent grants, Morse directly holds 9,893.0573 restricted stock units. Each RSU represents a right to receive one share of Amkor common stock in the future, subject to the time-based vesting conditions on the underlying awards granted in 2023 and 2025.

Does the AMKR Form 4 show Robert Morse buying or selling shares on the market?

The filing does not show any open-market buying or selling. Instead, it records automatic grants of dividend equivalent units that increase his restricted stock unit balance, reflecting non-cash compensation adjustments tied to prior RSU awards rather than discretionary trading in Amkor shares.

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

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Accepted by SEC EDGAR 04/02/2026 - 06:58 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^*

Morse Robert Randolph

(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		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 Robert R. Morse	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)