Amkor director adds RSUs from dividend equivalents

Amkor Technology director Roger Anthony Carolin reported three compensation-related acquisitions of restricted stock units.

Accepted by SEC EDGAR 06/25/2026 - 04:37 PM EDT

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Form Type

Rhea-AI Filing Summary

Amkor Technology director Roger Anthony Carolin reported three compensation-related acquisitions of restricted stock units. On June 23, 2026, he received small blocks of RSUs—2.5166, 9.4278, and 8.1651 units—credited as dividend equivalent units tied to prior time‑vested RSU grants from May 16, 2023, May 15, 2025, and May 13, 2026. Each dividend equivalent unit converts into an additional RSU with the same vesting terms as the original awards, and there were no open‑market share purchases or sales in this filing.

Insider Trade Summary

Grant/Award: 20.1095 shares

Grant/Award 3 txns

Insider Carolin Roger Anthony

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	8.1651	$0.00	$0.00
Grant/Award	Restricted Stock Units	9.4278	$0.00	$0.00
Grant/Award	Restricted Stock Units	2.5166	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 21,421.9549 contracts (Direct)

Holdings Before and After: Restricted Stock Units, 21,401.8454 to 21,421.9549 contracts (Direct)

Footnotes (3)

F1. Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 23, 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.
F2. Represents DEUs accrued upon the payment of a dividend on June 23, 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.
F3. Represents DEUs accrued upon the payment of a dividend on June 23, 2026 with respect to RSUs of the Issuer granted to the Reporting Person on May 13, 2026. 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 as DEUs (2023 grant): 2.5166 units RSUs granted as DEUs (2025 grant): 9.4278 units RSUs granted as DEUs (2026 grant): 8.1651 units +3 more

6 metrics

RSUs granted as DEUs (2023 grant) 2.5166 units Dividend equivalent units on June 23, 2026 for May 16, 2023 RSUs

RSUs granted as DEUs (2025 grant) 9.4278 units Dividend equivalent units on June 23, 2026 for May 15, 2025 RSUs

RSUs granted as DEUs (2026 grant) 8.1651 units Dividend equivalent units on June 23, 2026 for May 13, 2026 RSUs

RSUs after 2.5166-unit credit line 2,615.5166 units Total RSUs shown following that specific DEU transaction

RSUs after 9.4278-unit credit line 9,902.4851 units Total RSUs shown following that specific DEU transaction

RSUs after 8.1651-unit credit line 8,903.9532 units Total RSUs shown following that specific DEU transaction

Key Terms

Restricted Stock Units, dividend equivalent units ("DEUs"), time-vested restricted stock units, Grant, award, or other acquisition

4 terms

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.

dividend equivalent units ("DEUs") financial

"Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 23, 2026"

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

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

Amkor Technology reported that director Roger Anthony Carolin received three small grants of restricted stock units as dividend equivalent units on June 23, 2026. These RSUs are compensation-related credits, not open-market stock purchases or sales.

How many restricted stock units did the Amkor (AMKR) director receive on June 23, 2026?

On June 23, 2026, the director received 2.5166, 9.4278, and 8.1651 restricted stock units as dividend equivalent units. Each block is tied to a different earlier RSU grant and follows that grant’s original vesting terms.

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

Dividend equivalent units are additional restricted stock units credited when the company pays a dividend on existing RSUs. For Amkor, each DEU represents one extra RSU subject to the same provisions and vesting schedule as the underlying RSU grant.

Were any Amkor Technology (AMKR) shares bought or sold on the market in this Form 4?

No market trades occurred in this Form 4. All reported transactions are coded as grants or awards of restricted stock units, reflecting compensation-related accruals rather than open-market purchases or sales of Amkor common stock.

Which prior RSU grants at Amkor (AMKR) generated the new dividend equivalent units?

The new dividend equivalent units relate to time-vested RSUs originally granted on May 16, 2023, May 15, 2025, and May 13, 2026. Each new unit follows the same vesting and other provisions as its corresponding underlying RSU grant.

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

Form 4 Insider Transactions: What Each Field Means →

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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)
06/23/2026

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⁾	06/23/2026		A		8.1651		⁽¹⁾	⁽¹⁾	Common Stock	8.1651	$0	8,903.9532	D
Restricted Stock Units	⁽²⁾	06/23/2026		A		9.4278		⁽²⁾	⁽²⁾	Common Stock	9.4278	$0	9,902.4851	D
Restricted Stock Units	⁽³⁾	06/23/2026		A		2.5166		⁽³⁾	⁽³⁾	Common Stock	2.5166	$0	2,615.5166	D

Explanation of Responses:

1. Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 23, 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 June 23, 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.

3. Represents DEUs accrued upon the payment of a dividend on June 23, 2026 with respect to RSUs of the Issuer granted to the Reporting Person on May 13, 2026. 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	06/25/2026
	** 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