Amkor (NASDAQ: AMKR) EVP Rogers converts RSUs and has shares withheld for taxes

Rhea-AI Filing Summary

Amkor Technology EVP & General Counsel Mark N. Rogers reported the vesting and conversion of restricted stock units into common stock, along with related tax-withholding transactions, on February 20, 2026. He acquired 7,422 and 8,690 shares of common stock upon RSU vesting, while 3,181 and 3,724 shares were withheld at $47.94 per share to cover tax obligations. The RSUs were granted on February 20, 2024 and February 20, 2025 and vest in three equal annual installments. Following these transactions, Rogers directly owned 37,830 shares of Amkor common stock.

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)
02/20/2026

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	02/20/2026		M		7,422	A	$0	36,045	D
Common Stock	02/20/2026		F(1)		3,181	D	$47.94	32,864	D
Common Stock	02/20/2026		M		8,690	A	$0	41,554	D
Common Stock	02/20/2026		F(2)		3,724	D	$47.94	37,830	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	02/20/2026		M			7,422	(3)	(3)	Common Stock	7,422	$0	7,424	D
Restricted Stock Units	$0	02/20/2026		M			8,690	(4)	(4)	Common Stock	8,690	$0	17,385	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 20, 2024 (the "2024 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. The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the Reporting Person on February 20, 2025 (the "2025 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.

3. Represents shares of the Issuer's common stock underlying time-vested RSUs on the 2024 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 an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the 2024 Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the 2024 Grant Date.

4. Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on the 2025 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 an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the 2025 Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the 2025 Grant Date.

Remarks:

	/s/ Mark N. Rogers	02/24/2026
	** 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?

Mark N. Rogers reported RSU vesting that converted into Amkor common stock and related tax-withholding dispositions. He exercised 7,422 and 8,690 RSU-based shares, while 3,181 and 3,724 shares were withheld by Amkor to satisfy his tax obligations at a price of $47.94.

Were the AMKR Form 4 transactions open-market buys or sells?

The Form 4 for AMKR shows no open-market buys or sells. Shares were acquired through derivative exercises of restricted stock units and shares were disposed of only through tax-withholding transactions, where Amkor withheld stock to pay the executive’s tax liabilities on vesting.

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

After the reported transactions, Mark N. Rogers directly owns 37,830 shares of Amkor common stock. This total reflects RSU conversions into common stock and the net effect of shares withheld by the company to cover his associated tax obligations on vesting events.

What are the vesting terms of the AMKR RSUs granted to Mark N. Rogers?

The RSUs granted on February 20, 2024 and February 20, 2025 vest in three equal annual installments. Vesting begins on the first anniversary of each grant date and continues annually, so 100% of each award is vested by the third anniversary of its respective grant date.

Why were some AMKR shares withheld in the Form 4 filing?

The withheld AMKR shares cover Mark N. Rogers’ tax obligations from RSU vesting. Amkor retained 3,181 and 3,724 shares at $47.94 per share and will pay the related taxes on his behalf, a common practice for equity awards to company officers.

What equity plan governs the AMKR RSU awards to Mark N. Rogers?

The RSU awards reported in the AMKR Form 4 were granted under Amkor Technology’s 2021 Equity Incentive Plan, as amended. The plan and related award agreements define the vesting schedule, tax-withholding mechanics, and the service-based conditions tied to Rogers’ role as an officer.