Amkor director McCourt exercises options, sells 20K shares

Amkor Technology director MaryFrances McCourt exercised a stock option to acquire 20,000 shares of Common Stock at $19.39 per share and, on December 12, 2025, sold 20,000 shares at a weighted-average price of $46.02, with trades between $45.98 and $46.09.

Rhea-AI Filing Summary

Amkor Technology director MaryFrances McCourt exercised a stock option to acquire 20,000 shares of Common Stock at $19.39 per share and, on December 12, 2025, sold 20,000 shares at a weighted-average price of $46.02, with trades between $45.98 and $46.09. She continues to hold 55,918 shares directly.

Insider Trade Summary

Exercise and Sale: 20,000 shares ($533K approx. pre-tax spread)

Exercise and Sale 3 txns

Insider McCourt MaryFrances

Role Director

Sold 20,000 shs ($920K)

Approx. gross sale proceeds $920K

Approx. exercise cost $388K

Approx. pre-tax spread $533K

Type	Security	Shares	Price	Value
Exercise	Director Stock Option (Right-to-Buy)	20,000	$0.00	$0.00
Exercise	Common Stock	20,000	$19.39	$388K
Sale	Common Stock	20,000	$46.02	$920K

Holdings After Transaction: Director Stock Option (Right-to-Buy) — 0 contracts (Direct); Common Stock — 55,918 shares (Direct)

Footnotes (2)

1. F1. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.98 to $46.09. 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 (1) to this Form 4.
2. F2. This stock option to acquire 20,000 shares of the Issuer's Common Stock was granted on May 18, 2021 and vested in full on May 17, 2022.

Key Figures

Option Shares Exercised: 20,000 shares Exercise Price: $19.39 per share Shares Sold: 20,000 shares +2 more

5 metrics

Option Shares Exercised 20,000 shares Director stock option exercise on December 12, 2025

Exercise Price $19.39 per share Conversion or exercise price for Director Stock Option (Right-to-Buy)

Shares Sold 20,000 shares Common Stock sale reported for December 12, 2025

Weighted-Average Sale Price $46.02 per share Weighted-average price across multiple sale transactions between $45.98 and $46.09

Post-Transaction Holdings 55,918 shares Common Stock held directly by MaryFrances McCourt after the reported transactions

Key Terms

Director Stock Option (Right-to-Buy), weighted average price, derivative security

3 terms

Director Stock Option (Right-to-Buy) financial

"Security titled Director Stock Option (Right-to-Buy) was exercised into Common Stock."

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

derivative security financial

"Transaction code M is described as Exercise or conversion of derivative security."

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

FAQ

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

What insider transaction did AMKR director MaryFrances McCourt report?

MaryFrances McCourt reported exercising options for 20,000 Amkor shares and selling 20,000 shares on December 12, 2025. The option strike price was $19.39, and the sale occurred at a weighted-average price of $46.02 across multiple trades.

At what prices were the AMKR shares sold by director McCourt?

The reported sale price for McCourt’s 20,000 Amkor shares was a weighted-average $46.02 per share. A footnote states the individual trades occurred in a range between $45.98 and $46.09, reflecting multiple sale transactions that day.

How many AMKR shares does MaryFrances McCourt hold after these transactions?

After the reported option exercise and share sale, McCourt holds 55,918 shares of Amkor Common Stock directly. This post-transaction balance reflects her remaining ownership position following the exercise of 20,000 options and the sale of 20,000 shares.

What were the terms of the stock option exercised by AMKR director McCourt?

McCourt exercised a Director Stock Option (Right-to-Buy) covering 20,000 shares at an exercise price of $19.39 per share. A footnote explains the option was granted on May 18, 2021 and vested fully on May 17, 2022 before this 2025 exercise and sale.

Does McCourt’s Form 4 for AMKR reflect an exercise-and-sell pattern?

Yes. The Form 4 shows McCourt exercising options into 20,000 shares of Common Stock at $19.39, followed by a sale of 20,000 shares at a weighted-average $46.02. Together, these entries reflect an exercise-and-sell sequence reported for December 12, 2025.

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

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 12/16/2025 - 04:26 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^*

McCourt MaryFrances

(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
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/12/2025

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	12/12/2025		M		20,000	A	$19.39	75,918	D
Common Stock	12/12/2025		S		20,000	D	$46.02(1)	55,918	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
Director Stock Option (Right-to-Buy)	$19.39	12/12/2025		M			20,000	05/17/2022(2)	05/18/2031	Common Stock	20,000	$0	0	D

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.98 to $46.09. 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 (1) to this Form 4.

2. This stock option to acquire 20,000 shares of the Issuer's Common Stock was granted on May 18, 2021 and vested in full on May 17, 2022.

Remarks:

	/s/ Mark N. Rogers, Attorney-in-Fact for MaryFrances McCourt	12/16/2025
	** 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.