Amkor (AMKR) EVP Haghighi sells 15,624 shares after RSU vesting

Rhea-AI Filing Summary

Amkor Technology Executive Vice President Farshad Haghighi reported a net sale of common stock alongside RSU vesting activity. On February 24, 2026, 1,814 restricted stock units were converted into the same number of common shares at $0.00 per share, and 815 common shares were disposed of at $48.53 to cover tax withholding obligations related to the RSU vesting.

On February 25, 2026, Haghighi executed an open-market sale of 15,624 common shares at an average price of $50.50 per share. Following these transactions, he directly owned 8,354 shares of Amkor common stock.

Insider Trade Summary

Net Seller: 15,624 shares ($789,012)

Net Sell 4 txns

Insider Haghighi Farshad

Role Executive Vice President

Sold 15,624 shs ($789K)

Type	Security	Shares	Price	Value
Sale	Common Stock	15,624	$50.50	$789K
Exercise	Restricted Stock Units	1,814	$0.00	--
Exercise	Common Stock	1,814	$0.00	--
Tax Withholding	Common Stock	815	$48.53	$40K

Holdings After Transaction: Common Stock — 8,354 shares (Direct); Restricted Stock Units — 0 shares (Direct)

Footnotes (1)

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. 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.

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Form 4 Insider Transactions: What Each Field Means →

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^*

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)
02/24/2026

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		1,814	A	$0	24,793	D
Common Stock	02/24/2026		F(1)		815	D	$48.53	23,978	D
Common Stock	02/25/2026		S		15,624	D	$50.5	8,354	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			1,814	(2)	(2)	Common Stock	1,814	$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 Farshad Haghighi	02/26/2026
	** 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.
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 (AMKR) Executive Vice President Farshad Haghighi report in this Form 4?

Farshad Haghighi reported RSU vesting, a related tax-withholding share disposition, and an open-market sale. He converted 1,814 RSUs into common shares and later sold 15,624 shares at $50.50 each, ending with 8,354 shares directly owned.

How many Amkor (AMKR) shares did Farshad Haghighi sell and at what price?

Farshad Haghighi sold 15,624 shares of Amkor common stock in an open-market transaction at an average price of $50.50 per share. This sale occurred on February 25, 2026, and is classified as a non-derivative open-market sale.

What RSU-related transactions did Amkor (AMKR) EVP Farshad Haghighi report?

Haghighi reported the conversion of 1,814 restricted stock units into 1,814 common shares at $0.00 per share on February 24, 2026. In connection with this RSU vesting, 815 shares were withheld and disposed of at $48.53 to satisfy tax withholding obligations.

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

After the reported transactions, Farshad Haghighi directly owns 8,354 shares of Amkor common stock. This figure reflects the RSU conversion, the tax-withholding share disposition, and the subsequent open-market sale disclosed in the Form 4 filing.

Why were 815 Amkor (AMKR) shares disposed of in connection with RSU vesting?

The 815 shares were withheld by Amkor Technology to cover Farshad Haghighi’s tax obligations arising from vesting RSUs. The shares were valued at $48.53 each, and the company will pay the related taxes on his behalf, according to the footnote.