Amkor (NASDAQ: AMKR) EVP converts RSUs, withholds 806 shares for taxes

Rhea-AI Filing Summary

Amkor Technology EVP & General Counsel Mark N. Rogers exercised 1,880 restricted stock units into common stock on February 24, 2026, at no cash price under Amkor’s equity plan. To cover tax withholding on this vesting, 806 common shares were withheld at $48.53 per share, leaving him with 38,904 directly owned common shares.

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).

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^*

ROGERS MARK 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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP & General Counsel

3. Date of Earliest Transaction (Month/Day/Year)
02/24/2026

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
Common Stock	02/24/2026		M		1,880	A	$0	39,710	D
Common Stock	02/24/2026		F(1)		806	D	$48.53	38,904	D

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	$0(2)	02/24/2026		M			1,880	(2)	(2)	Common Stock	1,880	$0	0	D

Explanation of Responses:

1. The transaction represents shares withheld by Amkor Technology, Inc. (the "Issuer") in connection with the vesting of certain restricted stock units ("RSUs") granted to the Reporting Person on February 24, 2022 (the "Grant Date") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

2. Represents shares of the Issuer's common stock underlying time-vested RSUs on the Grant Date pursuant to the Issuer's Equity Incentive Plan. The RSUs were awarded for no consideration other than the Reporting Person's service as a service provider of the Issuer and vested in four equal annual installments beginning on the first anniversary of the Grant Date.

Remarks:

	/s/ Mark N. Rogers	02/26/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transactions did AMKR executive Mark N. Rogers report on this Form 4?

Mark N. Rogers reported vesting and exercise of 1,880 RSU-based shares and a related tax-withholding disposition of 806 common shares at $48.53 each, all under Amkor’s equity incentive plan and related award agreement.

How many AMKR shares did Mark N. Rogers acquire from RSUs on February 24, 2026?

He acquired 1,880 shares of Amkor common stock through the exercise of time-vested restricted stock units granted on February 24, 2022, under the company’s equity incentive plan, with no cash consideration beyond his service.

Why were 806 AMKR shares disposed of in Mark N. Rogers’ Form 4 filing?

The 806 Amkor common shares were withheld by the company to satisfy Mark N. Rogers’ tax withholding obligations tied to the RSU vesting. Amkor will pay the related taxes on his behalf as described in the filing footnote.

How many AMKR shares does Mark N. Rogers own after these Form 4 transactions?

After the RSU conversion and tax-withholding share disposition, Mark N. Rogers directly owns 38,904 shares of Amkor Technology common stock, according to the post-transaction ownership figures disclosed in the Form 4.

What was the origin and vesting schedule of the AMKR RSUs reported by Mark N. Rogers?

The reported RSUs were granted February 24, 2022, under Amkor’s 2021 Equity Incentive Plan. They were time-vested awards granted for service, vesting in four equal annual installments starting on the first anniversary of the grant date.