[Form 4] Amkor Technology Inc Insider Trading Activity

Rhea-AI Filing Summary

Form 4 overview: Amkor Technology, Inc. (AMKR) disclosed insider activity by Director Douglas A. Alexander. On 06/25/2025 the director acquired derivative securities in the form of restricted stock units (RSUs) that arose automatically as dividend-equivalent units (DEUs) on previously granted RSUs.

Details of derivative transactions:

• 34.2646 RSUs accrued on the 2022 grant, raising that award's total to 9,180.1509 RSUs.
• 33.3674 RSUs accrued on the 2023 grant, raising that award's total to 8,839.034 RSUs.
• 38.5269 RSUs accrued on the 2025 grant, raising that award's total to 9,827.5269 RSUs.

All three entries are coded “A” (acquired) at a cost of $0 because DEUs are issued in lieu of a cash dividend. Ownership remains direct; no shares were sold or transferred. No common‐stock transactions were reported in Table I, and no other changes in beneficial ownership were disclosed.

Implications for investors: The filing reflects routine dividend reinvestment mechanics rather than an elective purchase or sale. The incremental 106.1589 RSUs (<0.1% of Amkor’s 2024 basic share count) are immaterial to the company’s capital structure and do not signal a change in insider sentiment.

Insights

Securities Analyst

TL;DR: Routine DEU accrual; neutral signal, no cash outlay, negligible share impact.

The director merely received 106.1589 additional RSUs automatically when Amkor paid its dividend on 06/25/2025. Because DEUs convert into RSUs under the same vesting schedule as the original awards, this transaction neither injects new capital nor reflects discretionary insider buying. No common stock was sold, so float and insider ownership percentages remain virtually unchanged. Given Amkor’s ~245 million shares outstanding, the added units represent less than 0.0001% dilution—far below any material threshold. From a trading perspective, the filing should not influence valuation or liquidity.

Corporate Governance Expert

TL;DR: Compliance event, confirms proper Section 16 reporting; governance risk unchanged.

The Form 4 demonstrates timely disclosure within the two-business-day rule and properly distinguishes DEUs from cash dividends, aligning with SEC guidance. The attorney-in-fact signature indicates a standing power of attorney, common among large issuers. No red flags—such as late filings or ambiguous transaction codes—appear. Because the RSUs were priced at $0, the event does not raise compensation-design concerns or suggest opportunistic timing. Governance quality and insider alignment metrics for Amkor are therefore unaffected.

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^*

ALEXANDER DOUGLAS A

(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)
06/25/2025

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)	06/25/2025		A		34.2646		(1)	(1)	Common Stock	34.2646	$0	9,180.1509	D
Restricted Stock Units	(2)	06/25/2025		A		33.3674		(2)	(2)	Common Stock	33.3674	$0	8,839.034	D
Restricted Stock Units	(3)	06/25/2025		A		38.5269		(3)	(3)	Common Stock	38.5269	$0	9,827.5269	D

Explanation of Responses:

1. Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 25, 2025 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 17, 2022. 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 25, 2025 with respect to RSUs of 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.

3. Represents DEUs accrued upon the payment of a dividend on June 25, 2025 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:

	Mark N. Rogers, Attorney-in-Fact for Douglas A. Alexander	06/27/2025
	** 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

How many Amkor (AMKR) RSUs did Director Douglas A. Alexander acquire on 06/25/2025?

He acquired 106.1589 restricted stock units through dividend-equivalent accruals.

Were any AMKR common shares sold in this Form 4 filing?

No. No sales or disposals of common stock were reported; only RSU accruals were disclosed.

What is a dividend-equivalent unit (DEU) as referenced in the filing?

A DEU represents an additional RSU granted in lieu of a cash dividend, subject to the same vesting terms as the original award.

Does this insider transaction materially affect Amkor’s share count?

No. The additional 106 RSUs are immaterial relative to Amkor’s total shares outstanding.

Is the reporting person still considered an insider under Section 16?

Yes. The box indicating cessation of Section 16 obligation was not checked; Alexander remains a reporting insider.