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, 20:58:16 UTC
Prior SEC filing: 15 Aug 2024
Source filing: View source filing
Reporting owner signature: /s/ Brian D. Short, Attorney-in-Fact

Key filing fact

2024 Grantor Retained Annuity Trust of Susan Y. 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 Susan Y. 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, 20:58.

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 0002034102 Primary reporting owner

2024 Grantor Retained Annuity Trust of Susan Y. 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
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: -876,000
Change %: -44%
Price: $0.000000
Shares after: 1,124,000
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 Reporting Person distributed 876,000 shares of the Common Stock of Amkor Technology, Inc. to Susan Y. Kim. Susan Y. Kim is the sole trustee of the Reporting Person. Because Susan. Y. Kim is the annuitant and sole trustee of the Reporting Person, the distribution was a mere change in the form of ownership from indirect to direct and thus being voluntarily reported by the Reporting Person on this Form 4.

SEC remarks

(2) 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.