[Form 4] Amkor Technology Inc Insider Trading Activity

Rhea-AI Filing Summary

Amkor Technology, Inc. (AMKR) – Form 4 filing

Director Gil C. Tily reported the automatic acquisition of 38.5269 restricted stock units (RSUs) on 25 June 2025. The RSUs were issued as dividend equivalent units (DEUs) linked to previously granted, time-vested RSUs dated 15 May 2025. Each DEU carries the same vesting conditions as the underlying award and was credited at no cash cost to the insider (price $0).

Following this routine dividend accrual, Tily’s total beneficial ownership increased to 9,827.5269 RSUs, held in direct form. No common shares were sold, and no option-like derivatives were exercised or disposed.

The transaction represents a 0.4% incremental increase to the insider’s existing RSU position and appears administrative rather than strategic. No immediate cash outlay was made, and there is no indication of market purchase or sale activity under Rule 10b5-1. Overall market impact is expected to be immaterial due to the small size relative to Amkor’s ~247 million outstanding shares.

Positive

• Incremental insider ownership increase through additional RSUs, enhancing director–shareholder alignment albeit modestly.

Negative

• None.

Insights

Securities Analyst

TL;DR: Routine dividend-linked RSU credit; immaterial but mildly positive as it increases insider alignment.

The filing discloses a non-cash credit of 38.5269 RSUs to Director Gil C. Tily, stemming from Amkor’s June 25 dividend. Such DEUs merely maintain the economic value of existing awards after dividend distribution and do not reflect an active buy decision. Post-transaction holdings stand at 9,827.5269 RSUs, a de-minimis stake versus the company’s float, so liquidity and control metrics remain unchanged. While incremental insider ownership is generally viewed positively for alignment, the magnitude is too small to carry valuation weight. I categorize the impact as neutral to slightly positive for sentiment but not material for investors’ models.

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^*

Tily Gil C.

(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		38.5269		(1)	(1)	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 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 Gil C. Tily	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

What did Amkor director Gil C. Tily report in the latest Form 4?

She received 38.5269 RSUs as dividend equivalent units on 25 Jun 2025, raising her holdings to 9,827.5269 RSUs.

Did the insider buy or sell AMKR shares for cash?

No. The RSUs were credited at $0 price; there was no market purchase or sale activity.

How many Amkor shares does the director now beneficially own?

After the transaction, she owns 9,827.5269 RSUs, all held directly.

Is this Form 4 filing likely to impact AMKR’s stock price?

Impact is expected to be immaterial given the small number of RSUs relative to Amkor’s total shares outstanding.