Amkor (NASDAQ: AMKR) CFO Megan Faust reports RSU vesting and tax share disposition

Rhea-AI Filing Summary

Amkor Technology CFO Megan Faust reported routine equity compensation activity involving restricted stock units. On February 24, 2026, 3,493 RSUs were exercised and converted into 3,493 shares of common stock at $0.00 per share, reflecting vesting of prior grants.

To cover tax withholding obligations from this vesting, 1,497 common shares were automatically disposed of at $48.53 per share, with Amkor paying the related taxes on her behalf. After these transactions, Faust directly owned 129,171 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^*

Faust Megan

(Last) (First) (Middle)

2045 E 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)
	CFO

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		3,493	A	$0	130,668	D
Common Stock	02/24/2026		F(1)		1,497	D	$48.53	129,171	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			3,493	(2)	(2)	Common Stock	3,493	$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, Attorney-in-Fact for Megan Faust	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 Amkor (AMKR) CFO Megan Faust report?

Megan Faust reported RSU-related activity, exercising 3,493 restricted stock units into common shares, then disposing of 1,497 shares for tax withholding. These transactions reflect routine equity compensation vesting under Amkor’s equity incentive plan, not an open-market purchase or sale.

How many Amkor (AMKR) shares does CFO Megan Faust own after this Form 4?

After the reported transactions, Megan Faust directly owns 129,171 shares of Amkor common stock. This figure reflects the RSU conversion of 3,493 shares and the tax-withholding disposition of 1,497 shares executed on February 24, 2026, under the company’s equity incentive arrangements.

Were Megan Faust’s Amkor (AMKR) transactions open-market buys or sells?

The transactions were not open-market trades. They involved the exercise and vesting of 3,493 restricted stock units and an automatic disposition of 1,497 shares to satisfy tax withholding obligations, with Amkor paying the related taxes on her behalf under its equity incentive plan.

At what price were Amkor (AMKR) shares disposed of for Megan Faust’s tax withholding?

The 1,497 Amkor common shares disposed of for tax withholding were valued at $48.53 per share. These shares were withheld in connection with the vesting of restricted stock units, and Amkor paid the associated tax obligations on behalf of CFO Megan Faust.

What equity award arrangement led to Megan Faust’s Amkor (AMKR) RSU vesting?

The RSU vesting comes from awards granted on February 24, 2022 under Amkor’s 2021 Equity Incentive Plan. These time-vested restricted stock units were granted as compensation for service and vested in four equal annual installments beginning on the first anniversary of the grant date.