Amkor director awarded 18.1563 RSUs via dividend

AMKOR TECHNOLOGY, INC. director Daniel JL Liao reported an automatic acquisition of 18.1563 restricted stock units on dividend equivalent terms.

Rhea-AI Filing Summary

AMKOR TECHNOLOGY, INC. director Daniel JL Liao reported an automatic acquisition of 18.1563 restricted stock units on dividend equivalent terms. These dividend equivalent units were accrued on March 31, 2026 in connection with previously granted time-vested RSUs from May 15, 2025.

Each dividend equivalent unit represents an additional RSU that is subject to the same vesting and other provisions as the original RSU grant. Following this accrual, Liao’s direct holdings in RSUs tied to common stock total 9,893.0573 units, reflecting a small, compensation-related adjustment rather than an open-market trade.

Insider Trade Summary

Grant/Award: 18.1563 shares

Grant/Award 1 txn

Insider Liao Daniel JL

Role Director

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

Holdings After Transaction: Restricted Stock Units — 9,893.0573 contracts (Direct)

Footnotes (1)

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 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 granted: 18.1563 units Total RSUs after transaction: 9,893.0573 units Original RSU grant date: May 15, 2025 +1 more

4 metrics

Dividend equivalent RSUs granted 18.1563 units Automatic accrual on March 31, 2026

Total RSUs after transaction 9,893.0573 units Director’s direct RSU holdings following accrual

Original RSU grant date May 15, 2025 Time-vested RSUs to which dividend equivalents relate

Dividend payment date March 31, 2026 Date triggering accrual of dividend equivalent units

Key Terms

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

4 terms

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.

Restricted Stock Units financial

"security_title: "Restricted Stock Units" and 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.

time-vested restricted stock units financial

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

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 Daniel JL Liao report?

Daniel JL Liao reported an automatic acquisition of 18.1563 restricted stock units. These units were credited as dividend equivalent units linked to an existing time-vested RSU grant, increasing his direct RSU-based exposure to Amkor common stock.

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

Dividend equivalent units are additional restricted stock units credited when dividends are paid on underlying shares. For Amkor, 18.1563 units accrued on March 31, 2026, mirroring an existing time-vested RSU grant and following the same vesting and other conditions.

How many Amkor (AMKR) RSUs does Daniel JL Liao hold after this transaction?

After the dividend equivalent accrual, Daniel JL Liao directly holds 9,893.0573 restricted stock units. These RSUs are linked to Amkor common stock and reflect compensation-related awards rather than open-market share purchases or sales.

Was the Amkor (AMKR) insider transaction a market buy or sell of shares?

The reported transaction was not a market buy or sell. It was a grant-type acquisition of 18.1563 dividend equivalent restricted stock units, automatically credited in connection with a cash dividend on existing time-vested RSUs held by the director.

What dates are important in this Amkor (AMKR) Form 4 transaction?

Key dates are March 31, 2026, when the dividend equivalent units accrued, and May 15, 2025, the original grant date of the time-vested RSUs. The new units follow the same provisions as the original 2025 RSU award.

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

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Accepted by SEC EDGAR 04/02/2026 - 06:54 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^*

Liao Daniel JL

(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		18.1563		(1)	(1)	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 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 Daniel Liao	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)