Key facts
- This page summarizes MaryFrances McCourt's Form 4 filing for AMKOR TECHNOLOGY, INC. (AMKR).
- 3 reported transactions and 1 derivative row are listed below.
- Accepted by SEC: 16 Dec 2025, 16:26.
MaryFrances McCourt - 12 Dec 2025 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)
- Reporting relationship
- Director
- Issuer ticker
- AMKR
- Reported as of
- 12 Dec 2025
- Net transaction value
- -$532,600
- SEC form
- 4
- Accepted by SEC
- 16 Dec 2025, 16:26:52 UTC
- Prior SEC filing
- 25 Sep 2025
- Next SEC filing
- 29 Dec 2025
- Source filing
- View source filing
- Reporting owner signature
- /s/ Mark N. Rogers, Attorney-in-Fact for MaryFrances McCourt
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
MaryFrances McCourt filed Form 4 for AMKOR TECHNOLOGY, INC. (AMKR) on 16 Dec 2025.
Change
- Previous filing in this sequence was filed on 25 Sep 2025.
- Current net transaction value: -$532,600.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001730724
Primary reporting owner
McCourt MaryFrances
- Relationship
- Director
- Address
- 2045 EAST INNOVATION CIRCLE, TEMPE
- Signature
- /s/ Mark N. Rogers, Attorney-in-Fact for MaryFrances McCourt
- Signature date
- 16 Dec 2025
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
AMKR
transaction
Common Stock
Options Exercise
- Transaction value
- $387,800
- Shares
- +20,000
- Change %
- +36%
- Price
- $19.39
- Shares after
- 75,918
- Date
- 12 Dec 2025
- Ownership
- Direct
AMKR
transaction
Common Stock
Sale
- Transaction value
- $920,400
- Shares
- -20,000
- Change %
- -26%
- Price
- $46.02
- Shares after
- 55,918
- Date
- 12 Dec 2025
- Ownership
- Direct
- Footnotes
- F1
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
AMKR
transaction
Derivative
Director Stock Option (Right-to-Buy)
Options Exercise
- Transaction value
- $0
- Shares
- -20,000
- Change %
- -100%
- Price
- $0.000000
- Shares after
- 0
- Date
- 12 Dec 2025
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 20,000
- Exercise price
- $19.39
- Footnotes
- F2
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 2 footnotes
Footnote 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.
Footnote 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.