Amkor CEO granted RSUs, PSU awards vest

Amkor Technology President and CEO Kevin K. Engel reported equity compensation activity centered on restricted stock units and performance units.

Rhea-AI Filing Summary

Amkor Technology President and CEO Kevin K. Engel reported equity compensation activity centered on restricted stock units and performance units. On February 18, 2026, he acquired 53,487 and 21,394 restricted stock units, both granted at no cash cost under Amkor’s equity incentive plan.

On the same date, 1,777 and 5,594 shares of common stock vested from performance-based awards tied to a basic earnings per share goal over a one-year period beginning January 1, 2025 and ending December 31, 2025. To cover related tax withholding, 814 and 2,398 common shares were disposed of at $46.74 per share, with the company paying the taxes on Engel’s behalf.

Insider Trade Summary

6 transactions reported

Mixed 6 txns

Insider Engel Kevin K.

Role President and CEO

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	53,487	$0.00	$0.00
Grant/Award	Restricted Stock Units	21,394	$0.00	$0.00
Grant/Award	Common Stock	1,777	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	814	$46.74	$38K
Grant/Award	Common Stock	5,594	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	2,398	$46.74	$112K

Holdings After Transaction: Restricted Stock Units — 74,881 contracts (Direct); Common Stock — 4,945 shares (Direct)

Footnotes (5)

1. F1. This Form 4 reports the vesting on February 18, 2026 of 1,777 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. F2. 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. F3. The transaction represents the vesting on February 18, 2026 of 5,594 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. F4. 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.
5. F5. Represents shares of the Issuer's common stock underlying time-vested RSUs granted on February 18, 2026 (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 an officer of the Issuer and will vest in two equal annual installments beginning on December 31, 2026 such that 100% will be vested on December 31, 2027.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Amkor (AMKR) CEO Kevin Engel report in this Form 4?

Kevin Engel reported equity compensation activity including new restricted stock unit grants and vesting of performance-based stock awards. The filing also shows share dispositions used solely to satisfy tax withholding obligations related to those vested performance units under Amkor’s equity incentive plan.

How many restricted stock units did Amkor (AMKR) grant to its CEO?

On February 18, 2026, Kevin Engel received two time-vested restricted stock unit grants covering 53,487 and 21,394 units. These RSUs were awarded for no cash consideration, in connection with his service as an officer under Amkor Technology’s equity incentive plan.

What performance condition triggered Kevin Engel’s PSU vesting at Amkor (AMKR)?

The performance-vested restricted stock units vested based on achieving a basic earnings per share performance goal. The measurement period ran for one year from January 1, 2025 through December 31, 2025, and successful attainment led to the vesting of common shares on February 18, 2026.

How many Amkor (AMKR) common shares vested for the CEO from PSUs?

Two PSU grants converted into 1,777 and 5,594 shares of Amkor common stock on February 18, 2026. Both awards were originally granted under the company’s equity incentive plan and vested after the specified basic earnings per share performance goal was met over the one-year period.

Why did Kevin Engel dispose of Amkor (AMKR) shares at $46.74 in this filing?

The share dispositions at $46.74 per share represent stock withheld to cover tax obligations from PSU vesting. Amkor retained 814 and 2,398 shares to satisfy Kevin Engel’s tax withholding, and the company will pay these taxes on his behalf rather than this being an open-market sale.

How will the new Amkor (AMKR) RSU awards to the CEO vest over time?

The time-vested RSUs granted February 18, 2026 vest in scheduled installments. One award vests in three equal annual tranches starting on the first anniversary of the grant date, while another vests in two equal installments beginning December 31, 2026, fully vesting by December 31, 2027.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 02/20/2026 - 04:16 PM Learn about SEC filing dates

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^*

Engel Kevin K.

(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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO

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)		1,777	A	$0	2,563	D
Common Stock	02/18/2026		F(2)		814	D	$46.74	1,749	D
Common Stock	02/18/2026		A(3)		5,594	A	$0	7,343	D
Common Stock	02/18/2026		F(2)		2,398	D	$46.74	4,945	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		53,487		(4)	(4)	Common Stock	53,487	$0	53,487	D
Restricted Stock Units	$0	02/18/2026		A		21,394		(5)	(5)	Common Stock	21,394	$0	21,394	D

Explanation of Responses:

1. This Form 4 reports the vesting on February 18, 2026 of 1,777 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 5,594 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.

5. Represents shares of the Issuer's common stock underlying time-vested RSUs granted on February 18, 2026 (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 an officer of the Issuer and will vest in two equal annual installments beginning on December 31, 2026 such that 100% will be vested on December 31, 2027.

Remarks:

	/s/ Mark N. Rogers, Attorney-in-Fact for Kevin Engel	02/20/2026
	** 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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