2024 - 20 Nov 2025 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Reporting relationship: Member of 10% owner group (2)
Issuer ticker: AMKR
Reported as of: 20 Nov 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 24 Nov 2025, 20:57:57 UTC
Prior SEC filing: 15 Aug 2024
Source filing: View source filing
Reporting owner signature: /s/ Brian D. Short, Attorney-in-Fact for Agnes C. Kim

Key filing fact

2024 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 8/5/2024 filed Form 4 for AMKOR TECHNOLOGY, INC. (AMKR) on 24 Nov 2025.

Key facts

This page summarizes 2024 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 8/5/2024's Form 4 filing for AMKOR TECHNOLOGY, INC. (AMKR).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 24 Nov 2025, 20:57.

Change

Previous filing in this sequence was filed on 15 Aug 2024.
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 0002034104 Primary reporting owner

2024 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 8/5/2024

Relationship: Member of 10% owner group (2)
Address: C/O SIANA CARR O'CONNOR & LYNAM, 1500 EAST LANCASTER AVENUE, PAOLI
Signature: /s/ Brian D. Short, Attorney-in-Fact for Agnes C. Kim
Signature date: 24 Nov 2025

Reported non-derivative transactions

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

AMKR transaction

Common Stock

Gift

Transaction value: $0
Shares: -705,000
Change %: -44%
Price: $0.000000
Shares after: 895,000
Date: 20 Nov 2025
Ownership: Direct
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

On November 20, 2025, the 2024 Grantor Retained Annuity Trust of Agnes C. Kim 8/5/2024 distributed 705,000 shares of the Common Stock of Amkor Technology, Inc (the "Issuer") to the Agnes C. Kim Revocable Trust, of which Agnes C. Kim is the sole settlor, sole beneficiary, and sole trustee. Susan Y. Kim is the sole trustee of the 2024 Grantor Retained Annuity Trust of Agnes C. Kim 8/5/2024.

SEC remarks

2. The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for any other purpose.