[Form 4] AMKOR TECHNOLOGY, INC. Insider Trading Activity

Rhea-AI Filing Summary

AMKOR TECHNOLOGY, INC. (AMKR) director David N. Watson received 27.3648 restricted stock units (RSUs) credited as dividend equivalent units (DEUs) tied to time‑vested RSUs, recorded as acquired on 09/23/2025 at a $0 price. The DEUs mirror the original RSU grant terms and increased Mr. Watson's direct beneficial ownership to 9,854.8917 shares. The transaction was reported by an attorney‑in‑fact on behalf of the reporting person. This filing documents a routine equity accrual tied to a dividend on the company's RSUs rather than an open‑market purchase or sale.

Positive

• Director's ownership increased via 27.3648 RSUs credited as dividend equivalents, raising direct beneficial ownership to 9,854.8917 shares
• No cash was paid for the units (reported price $0), indicating an in‑kind compensation adjustment rather than a market purchase

Negative

• None.

Insights

Financial Analyst

TL;DR: A routine allocation of dividend equivalent RSUs modestly raises a director's direct stake; no cash consideration or market trade occurred.

This Form 4 reports that the director received 27.3648 RSUs as dividend equivalents, increasing direct beneficial ownership to 9,854.8917 shares. The units were issued at $0 and follow the same vesting provisions as the underlying time‑vested RSUs, indicating no immediate dilution from a cash issuance and no open‑market activity. For investors, this is a governance and compensation disclosure rather than an indicator of insider buying or selling activity.

Corporate Governance Expert

TL;DR: Compensation mechanics drove a small in‑kind equity accrual for a director; standard practice for dividend treatment of RSUs.

The filing documents dividend equivalent units credited to previously granted time‑vested RSUs, consistent with common equity compensation policies that preserve value for grantees when dividends are paid. The DEUs carry the same terms as the underlying RSUs, so they do not create new contractual obligations beyond the original award schedule. This is a routine governance disclosure and does not reflect a change in director independence or control.

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

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

WATSON DAVID N

(Last) (First) (Middle)

2045 EAST INNOVATION CIRCLE

(Street)

TEMPE AZ 85284

(City) (State) (Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
09/23/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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)	09/23/2025		A		27.3648		(1)	(1)	Common Stock	27.3648	$0	9,854.8917	D

Explanation of Responses:

1. Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2025 with respect to time-vested restricted stock units ("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 David N. Watson	09/25/2025
	** 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.

FAQ

What did AMKR director David N. Watson receive according to the Form 4?

The filing shows he received 27.3648 restricted stock units (RSUs) credited as dividend equivalent units tied to time‑vested RSUs.

How did this transaction affect David N. Watson's holdings in AMKR?

The DEUs increased his direct beneficial ownership to 9,854.8917 shares following the reported transaction.

Was cash paid for the RSUs reported on the Form 4?

No. The DEUs were recorded at a $0 price, reflecting an in‑kind credit rather than a cash purchase.

What is the nature of the units credited in this filing?

They are dividend equivalent units (DEUs) that represent additional RSUs and are subject to the same vesting and terms as the underlying time‑vested RSUs.

Does this Form 4 indicate open‑market insider trading activity?

No. The entry reports an in‑kind accrual of DEUs tied to existing RSUs, not a buy or sell transaction in the market.