David N. Watson - 25 Feb 2026 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Reporting relationship: Director
Issuer ticker: AMKR
Reported as of: 25 Feb 2026
Net transaction value: +$113,200
SEC form: 4
Accepted by SEC: 26 Feb 2026, 16:09:26 UTC
Prior SEC filing: 29 Dec 2025
Next SEC filing: 02 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Mark N. Rogers, Attorney-in-Fact for David N. Watson

Key filing fact

David N. Watson filed Form 4 for AMKOR TECHNOLOGY, INC. (AMKR) on 26 Feb 2026.

Key facts

This page summarizes David N. Watson's Form 4 filing for AMKOR TECHNOLOGY, INC. (AMKR).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 26 Feb 2026, 16:09.

Change

Previous filing in this sequence was filed on 29 Dec 2025.
Current net transaction value: +$113,200.

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

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001276908 Primary reporting owner

WATSON DAVID N

Relationship: Director
Address: 2045 EAST INNOVATION CIRCLE, TEMPE
Signature: /s/ Mark N. Rogers, Attorney-in-Fact for David N. Watson
Signature date: 26 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AMKR transaction

Common Stock

Options Exercise

Transaction value: $113,200
Shares: +20,000
Change %: +19%
Price: $5.66
Shares after: 122,980
Date: 25 Feb 2026
Ownership: Direct

AMKR transaction

Common Stock

Tax liability

Transaction value: $0
Shares: -2,223
Change %: -1.8%
Price: $0.000000
Shares after: 120,757
Date: 25 Feb 2026
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: 25 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 20,000
Exercise price: $5.66
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

Exempt purchase under Section 16b-3. Transaction executed as net exercise executed with Amkor Technology, Inc. (the "Issuer"), in which no shares were purchased or sold in the open market.

Footnote F2

This stock option to acquire 20,000 shares of the Issuer's Common Stock was granted on May 4, 2016 and vested in full on May 2, 2017.