Amkor (NASDAQ: AMKR) director granted dividend-equivalent RSUs

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Amkor Technology director Winston J. Churchill received additional stock-based compensation through dividend equivalents. On the payment of a dividend on March 31, 2026, he was credited with 18.1563 restricted stock units (RSUs) as dividend equivalent units tied to an existing time-vested RSU award granted on May 15, 2025. Each dividend equivalent unit converts into one additional RSU under the same vesting terms as the original grant. Following this accrual, Churchill holds a total of 9,893.0573 RSUs directly, reflecting routine, non-cash compensation rather than an open-market share purchase.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider CHURCHILL WINSTON J

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	18.156	$0.00	--

Holdings After Transaction: Restricted Stock Units — 9,893.057 shares (Direct)

Footnotes (1)

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Key Figures

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

4 metrics

Dividend-equivalent RSUs granted 18.1563 RSUs Granted as dividend equivalent units on March 31, 2026

Total RSUs after transaction 9,893.0573 RSUs Director Winston J. Churchill holdings following March 31, 2026 accrual

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

Transaction code A (Grant or award) Form 4 classification of RSU dividend-equivalent acquisition

Key Terms

Dividend equivalent units, Restricted Stock Units, time-vested, Grant, award, or other acquisition

4 terms

Dividend equivalent units financial

"Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend"

Restricted Stock Units financial

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

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 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.

Grant, award, or other acquisition financial

"transaction_code_description: "Grant, award, or other acquisition""

Form 4 Insider Transactions: What Each Field Means →

04/02/2026 - 06:52 PM

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)
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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
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 Winston J. Churchill	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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Amkor Technology (AMKR) report for Winston J. Churchill?

Amkor reported that director Winston J. Churchill received 18.1563 restricted stock units as dividend equivalent units on March 31, 2026. These units were added to his existing time-vested RSU award and represent stock-based compensation, not an open-market share purchase.

How many Amkor (AMKR) restricted stock units does Winston J. Churchill hold after this Form 4?

After the March 31, 2026 dividend equivalent credit, Winston J. Churchill holds a total of 9,893.0573 restricted stock units. These RSUs are tied to prior equity awards and follow the same time-vesting provisions as the original grant from May 15, 2025.

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

Dividend equivalent units are additional restricted stock units credited when a dividend is paid on underlying shares. For Churchill, each DEU represents one extra RSU that follows the same vesting terms as the original May 15, 2025 RSU grant from Amkor Technology.

Was the Amkor (AMKR) Form 4 transaction a stock purchase or sale?

The Form 4 did not report a stock purchase or sale. It showed an acquisition of 18.1563 restricted stock units as a grant of dividend equivalent units, which is compensation-related and not an open-market trading transaction in Amkor Technology common shares.

What was the effective date tied to the Amkor (AMKR) dividend equivalent RSU accrual?

The dividend equivalent restricted stock units accrued upon payment of a dividend on March 31, 2026. On that date, 18.1563 additional RSUs were credited to Winston J. Churchill’s existing time-vested award, increasing his total RSU holdings reported in the Form 4.