Amkor (NASDAQ: AMKR) EVP Haghighi vests RSUs, shares withheld for tax

Rhea-AI Filing Summary

Amkor Technology Executive Vice President Farshad Haghighi reported RSU vesting and related share withholdings. On February 20, 2026, he acquired common stock through the exercise or conversion of restricted stock units granted under Amkor's 2021 Equity Incentive Plan, tied to awards from February 20, 2024 and February 20, 2025.

To cover tax withholding obligations from these vestings, Amkor withheld shares of common stock at a value of $47.94 per share rather than using cash. Following these transactions, Haghighi directly owned 22,979 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^*

Haghighi Farshad

(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)
	Executive Vice President

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		7,153	A	$0	20,418	D
Common Stock	02/20/2026		F(1)		3,210	D	$47.94	17,208	D
Common Stock	02/20/2026		M		10,468	A	$0	27,676	D
Common Stock	02/20/2026		F(2)		4,697	D	$47.94	22,979	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			7,153	(3)	(3)	Common Stock	7,153	$0	7,424	D
Restricted Stock Units	$0	02/20/2026		M			10,468	(4)	(4)	Common Stock	10,468	$0	21,731	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, Attorney-in-Fact for Farshad Haghighi	02/24/2026
	** 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.
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FAQ

What did Amkor (AMKR) executive Farshad Haghighi report in this Form 4?

Farshad Haghighi reported vesting of restricted stock units and related share movements on February 20, 2026. RSUs granted in 2024 and 2025 converted into common stock, and some shares were withheld by Amkor to satisfy his tax withholding obligations.

How many Amkor (AMKR) shares does Farshad Haghighi own after these transactions?

After the reported transactions, Farshad Haghighi directly owned 22,979 shares of Amkor common stock. This reflects the net result of RSU conversions into shares and shares withheld by the company to cover his associated tax withholding obligations.

Were any of Farshad Haghighi’s Amkor (AMKR) shares sold on the open market?

No open-market sales are reported. Shares labeled with transaction code "F" were withheld by Amkor to pay tax liabilities related to RSU vesting, with taxes paid by the company on Haghighi’s behalf rather than through a market transaction.

What are the terms of Farshad Haghighi’s Amkor (AMKR) RSU awards?

The RSUs were granted for his service as an officer and require no cash consideration. Awards granted on February 20, 2024 and February 20, 2025 each vest in three equal annual installments, so 100% vests by the third anniversary of each grant date.

Why did Amkor (AMKR) withhold shares from Farshad Haghighi’s RSU vesting?

Amkor withheld shares to satisfy Haghighi’s tax withholding obligations arising from RSU vesting. The company will pay these taxes on his behalf, using the withheld shares valued at $47.94 each rather than requiring a separate cash payment.

What do the "M" and "F" transaction codes mean in this Amkor (AMKR) Form 4?

Code "M" reflects the exercise or conversion of derivative securities, here RSUs converting into common stock. Code "F" reflects shares delivered back to Amkor to pay the exercise price or tax liabilities, functioning as a tax-withholding disposition.