2023 - 01 Aug 2025 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Reporting relationship: Member of 10% owner group (3)
Issuer ticker: AMKR
Reported as of: 01 Aug 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 05 Aug 2025, 19:18:02 UTC
Prior SEC filing: 01 Aug 2025
Source filing: View source filing
Reporting owner signature: /s/ Brian D. Short, Attorney-in-Fact

Key filing fact

2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 filed Form 4 for AMKOR TECHNOLOGY, INC. (AMKR) on 05 Aug 2025.

Key facts

This page summarizes 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023's Form 4 filing for AMKOR TECHNOLOGY, INC. (AMKR).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 05 Aug 2025, 19:18.

Change

Previous filing in this sequence was filed on 01 Aug 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 0001977033 Primary reporting owner

2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023

Relationship: Member of 10% owner group (3)
Address: C/O SIANA CARR O'CONNOR & LYNAM, 1500 EAST LANCASTER AVENUE, PAOLI
Signature: /s/ Brian D. Short, Attorney-in-Fact
Signature date: 05 Aug 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: -438,002
Change %: -50%
Price: $0.000000
Shares after: 438,002
Date: 01 Aug 2025
Ownership: Direct
Footnotes: F1

AMKR transaction

Common Stock

Gift

Transaction value: $0
Shares: -438,002
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 01 Aug 2025
Ownership: Direct
Footnotes: F2

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

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 2 footnotes

Footnote F1

On August 1, 2025, the Reporting Person distributed 438,002 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") to Susan Y. Kim. Susan Y. Kim is the sole trustee of the Reporting Person.

Footnote F2

On August 1, 2025, the Reporting Person distributed 438,002 shares of the Common Stock of the Issuer to John T. Kim. Susan Y. Kim is the sole trustee of the Reporting Person.

SEC remarks

(3) The Reporting Person states that the filing of this Form 4 shall not be deemed an admission that the Reporting Person is the beneficial owner of the reported securities owned by the other members of the group, for the purpose of Section 16, or for any other purpose.