Amkor Technology (AMKR) EVP Rogers reports option exercise, RSU vesting and share sale

Rhea-AI Filing Summary

Amkor Technology EVP & General Counsel Mark N. Rogers reported multiple equity transactions in company stock. On February 17, 2026, he exercised employee stock options to acquire 5,000 shares of common stock at $7.40 per share and then sold 5,000 shares of common stock at $46.92 per share in an open-market transaction executed under a pre-established Rule 10b5-1 trading plan.

On February 16, 2026, 1,856 restricted stock units vested and converted into common stock, with 796 shares withheld to cover tax obligations, which the company will pay on his behalf. After these transactions, Rogers directly held 24,922 shares of common stock and 100,000 employee stock options.

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).

X

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)
02/16/2026

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	02/16/2026		M		1,856	A	$0	25,718	D
Common Stock	02/16/2026		F(1)		796	D	$47.48	24,922	D
Common Stock	02/17/2026		M		5,000	A	$7.4	29,922	D
Common Stock	02/17/2026		S(2)		5,000	D	$46.92	24,922	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(3)	02/16/2026		M			1,856	(3)	(3)	Common Stock	1,856	$0	1,855	D
Employee Stock Option (Right-to-Buy)	$7.4	02/17/2026		M			5,000	06/10/2020(4)	06/10/2029	Common Stock	5,000	$0	100,000	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 16, 2023 (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. The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 1, 2025.

3. On the Grant Date, the Reporting Person was granted 7,423 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

4. This stock option (the "Option") to acquire 200,000 shares of the Issuer's common stock (the "Option Shares") was granted on June 10, 2019 (the "Option Grant Date") and vested over four years as follows: (i) with respect to 25% of the Option Shares, on the first anniversary of the Option Grant Date; and (ii) with respect to the remainder of the Option Shares, in equal quarterly installments thereafter, such that 100% of the Option vested on the fourth anniversary of the Option Grant Date.

Remarks:

	/s/ Mark N. Rogers	02/18/2026
	** 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).
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FAQ

What insider transactions did AMKR EVP & General Counsel Mark N. Rogers report?

Mark N. Rogers reported option exercises, restricted stock unit vesting, an open-market share sale, and a tax-withholding share disposition. The activity included 5,000 options exercised, 1,856 RSUs vested, a 5,000-share sale, and 796 shares withheld for taxes over February 16–17, 2026.

How many AMKOR TECHNOLOGY (AMKR) shares did Mark N. Rogers sell in this Form 4?

He sold 5,000 shares of Amkor Technology common stock. The sale was reported as an open-market or private transaction at a price of $46.92 per share and was executed pursuant to a pre-established Rule 10b5-1 trading plan adopted on August 1, 2025.

What stock option activity did the AMKR Form 4 disclose for Mark N. Rogers?

Rogers exercised employee stock options for 5,000 shares of Amkor Technology common stock at $7.40 per share. These options are part of a grant originally covering 200,000 shares, which vested over four years starting from the June 10, 2019 grant date.

What restricted stock unit vesting was reported for AMKR’s Mark N. Rogers?

The filing shows 1,856 restricted stock units vested and converted into Amkor Technology common stock on February 16, 2026. These RSUs came from a 7,423-unit grant dated February 16, 2023 that vests in four equal annual installments beginning on the first anniversary.

Why were 796 AMKR shares withheld in Mark N. Rogers’ Form 4?

The 796 withheld shares were used to cover tax obligations from restricted stock unit vesting. Amkor Technology retained these shares and will pay the taxes on Rogers’ behalf, as permitted under the company’s 2021 Equity Incentive Plan and related award agreement.

How many AMKOR TECHNOLOGY (AMKR) shares does Mark N. Rogers own after these transactions?

Following the reported transactions, Rogers directly held 24,922 shares of Amkor Technology common stock. He also held 100,000 employee stock options, which remain outstanding after the partial exercise disclosed in this Form 4 filing covering February 16–17, 2026 activity.