Amkor (AMKR) EVP and General Counsel reports RSU grant and PSU vesting

Rhea-AI Filing Summary

AMKOR TECHNOLOGY, INC. executive vice president and general counsel Mark N. Rogers reported multiple equity-related transactions on February 18, 2026. He received 14,976 restricted stock units granted for his service, which will vest in three equal annual installments starting on the first anniversary of the grant date.

On the same date, 2,003 shares and 4,475 shares of common stock vested from performance-vested restricted stock units granted in 2024 and 2025. These PSUs vested based on achieving a basic earnings per share performance goal over a one-year period from January 1, 2025 to December 31, 2025. The company withheld 859 shares and 1,918 shares to cover tax obligations, and will pay the related taxes on his behalf.

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)
02/18/2026

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	02/18/2026		A(1)		2,003	A	$0	26,925	D
Common Stock	02/18/2026		F(2)		859	D	$46.74	26,066	D
Common Stock	02/18/2026		A(3)		4,475	A	$0	30,541	D
Common Stock	02/18/2026		F(2)		1,918	D	$46.74	28,623	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	02/18/2026		A		14,976		(4)	(4)	Common Stock	14,976	$0	14,976	D

Explanation of Responses:

1. This Form 4 reports the vesting on February 18, 2026 of 2,003 shares of common stock of Amkor Technology, Inc. (the "Issuer") underlying performance-vested restricted stock units ("PSUs") granted to the Reporting Person on February 20, 2024 pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic earnings per share performance goal over a one-year performance period beginning January 1, 2025 and ending on December 31, 2025.

2. The transaction represents shares of the Issuer's common stock withheld by the Issuer in connection with the vesting of PSUs to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

3. The transaction represents the vesting on February 18, 2026 of 4,475 shares of common stock of the Issuer's underlying PSUs granted to the Reporting Person on February 20, 2025 pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic earnings per share performance goal over a one-year performance period beginning January 1, 2025 and ending on December 31, 2025.

4. Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 18, 2026 (the "Grant Date") pursuant to the Issuer's Equity Incentive Plan (the "RSUs"). 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 Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the Grant Date.

Remarks:

	/s/ Mark N. Rogers	02/20/2026
	** Signature of Reporting Person	Date
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FAQ

What did AMKR executive Mark N. Rogers report in this Form 4 filing?

Mark N. Rogers reported equity awards and related tax withholdings. He received 14,976 restricted stock units and had performance-based stock units vest into common shares, with a portion of those shares withheld to satisfy tax obligations.

How many restricted stock units did Mark N. Rogers receive from Amkor (AMKR)?

He received 14,976 restricted stock units on February 18, 2026. These RSUs were granted for his service as an officer under Amkor’s Equity Incentive Plan and will vest in three equal annual installments starting one year after the grant date.

What performance goals triggered PSU vesting for AMKR’s Mark N. Rogers?

The performance-vested restricted stock units vested based on achieving a basic earnings per share performance goal. The performance period ran from January 1, 2025 through December 31, 2025, determining the vesting of 2,003 and 4,475 common shares.

Why were some AMKR shares disposed of in this Form 4 for Mark N. Rogers?

The dispositions reflect shares withheld to cover tax obligations upon PSU vesting. Amkor withheld 859 and 1,918 shares of common stock and will pay the related taxes on Mark N. Rogers’ behalf, rather than him selling shares in the open market.

How will the new RSUs granted to AMKR’s Mark N. Rogers vest over time?

The 14,976 restricted stock units granted on February 18, 2026 will vest in three equal annual installments. Vesting begins on the first anniversary of the grant date, with the remaining installments vesting annually so that all units are vested by the third anniversary.