Amkor Technology (AMKR) EVP & General Counsel sells 20,000 shares

Rhea-AI Filing Summary

Amkor Technology executive Mark N. Rogers, EVP & General Counsel, reported an option exercise and share sale. On 12/16/2025 he exercised employee stock options for 20,000 shares of common stock at an exercise price of $7.40 per share, increasing his directly held shares before the sale.

That same day, he sold 20,000 shares of Amkor common stock at a weighted average price of $42.95 per share, in multiple trades between $42.15 and $43.65, under a Rule 10b5-1 trading plan adopted on August 1, 2025. After these transactions, he directly owned 23,862 shares of common stock and 110,000 stock options, part of an original 200,000-share option grant from June 10, 2019 that vested over four years.

Insider Trade Summary

Net Seller: 20,000 shares ($859,000)

Net Sell 3 txns

Insider ROGERS MARK N

Role EVP & General Counsel

Sold 20,000 shs ($859K)

Type	Security	Shares	Price	Value
Exercise	Employee Stock Option (Right-to-Buy)	20,000	$0.00	--
Exercise	Common Stock	20,000	$7.40	$148K
Sale	Common Stock	20,000	$42.95	$859K

Holdings After Transaction: Employee Stock Option (Right-to-Buy) — 110,000 shares (Direct); Common Stock — 43,862 shares (Direct)

Footnotes (1)

1. 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. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $42.15 to $43.65. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the "Issuer"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 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.

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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).

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)
12/16/2025

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	12/16/2025		M		20,000	A	$7.4	43,862	D
Common Stock	12/16/2025		S(1)		20,000	D	$42.95(2)	23,862	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
Employee Stock Option (Right-to-Buy)	$7.4	12/16/2025		M			20,000	06/10/2020(3)	06/10/2029	Common Stock	20,000	$0	110,000	D

Explanation of Responses:

1. 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.

2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $42.15 to $43.65. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the "Issuer"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4.

3. 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	12/17/2025
	** 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 insider transaction did Amkor Technology (AMKR) report for Mark N. Rogers?

Mark N. Rogers, EVP & General Counsel of Amkor Technology, Inc., exercised employee stock options for 20,000 shares of common stock at an exercise price of $7.40 per share on 12/16/2025 and sold 20,000 shares of common stock on the same date.

At what prices were the Amkor Technology (AMKR) shares sold in this insider trade?

The reported sale used a weighted average price of $42.95 per share. The filing notes the shares were sold in multiple transactions at prices ranging from $42.15 to $43.65 per share.

How many Amkor Technology (AMKR) shares does Mark N. Rogers own after this transaction?

Following the reported transactions, Mark N. Rogers directly owned 23,862 shares of Amkor common stock and held 110,000 employee stock options.

Was the Amkor Technology (AMKR) insider sale made under a Rule 10b5-1 trading plan?

Yes. The sale was effected under a Rule 10b5-1 trading plan adopted by Mark N. Rogers on August 1, 2025, as disclosed in the explanation of responses.

What are the key terms of the stock option exercised by the Amkor Technology (AMKR) executive?

The option was an employee stock option to acquire 200,000 shares of Amkor common stock, granted on June 10, 2019 at an exercise price of $7.40 per share. It vested over four years: 25% on the first anniversary of the grant date and the remainder in equal quarterly installments until the fourth anniversary.

What position does the reporting person hold at Amkor Technology (AMKR)?

The reporting person, Mark N. Rogers, is identified as an Officer of Amkor Technology with the title EVP & General Counsel.