John D. Liu - 23 Sep 2025 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Reporting relationship: Director
Issuer ticker: AMKR
Reported as of: 23 Sep 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 25 Sep 2025, 16:33:26 UTC
Prior SEC filing: 27 Jun 2025
Next SEC filing: 23 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Mark N. Rogers, Attorney-in-Fact for John D. Liu

Key filing fact

John D. Liu filed Form 4 for AMKOR TECHNOLOGY, INC. (AMKR) on 25 Sep 2025.

Key facts

This page summarizes John D. Liu's Form 4 filing for AMKOR TECHNOLOGY, INC. (AMKR).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 25 Sep 2025, 16:33.

Change

Previous filing in this sequence was filed on 27 Jun 2025.
Current net transaction value: $0.

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 0001288449 Primary reporting owner

LIU JOHN D

Relationship: Director
Address: 2045 E INNOVATION CIRCLE, TEMPE
Signature: /s/ Mark N. Rogers, Attorney-in-Fact for John D. Liu
Signature date: 25 Sep 2025

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

AMKR transaction Derivative

Restricted Stock Units

Award

Transaction value: $0
Shares: +27
Change %: +0.28%
Price: $0.000000
Shares after: 9,855
Date: 23 Sep 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 27
Exercise price
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2025 with respect to time-vested restricted stock units ("RSUs") of the Issuer granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.