James J. Kim - May 14, 2025 SCHEDULE 13D/A Report for Amkor Technology, Inc. Common Stock, par value $0.001 per share (AMKR)

Filing Manager
James J. Kim
Reporting Manager
John T. Kim
Security
Amkor Technology, Inc. Common Stock, par value $0.001 per share
Symbol
AMKR
Shares outstanding
247M shares
Disclosed Ownership
83.3M shares
Ownership
33.7%
Form type
SCHEDULE 13D/A
Date filed
5/16/2025, 04:05 PM
Date of event
May 14, 2025
SEC
View on sec.gov

Reporting Managers (49)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
James J. Kim 0.2% 522K 522K 0 /s/ Brian D. Short, Attorney-in-Fact Brian D. Short, Attorney-in-Fact 0001158839
James J. Kim, as Trustee 4% 9.79M 0 9.79M /s/ Brian D. Short, Attorney-in-Fact Brian D. Short, Attorney-in-Fact
Agnes C. Kim 0% 95K 95K 0 /s/ Brian D. Short, Attorney-in-Fact Brian D. Short, Attorney-in-Fact
John T. Kim 33.7% 83.3M 47M 36.4M /s/ Brian D. Short, Attorney-in-Fact Brian D. Short, Attorney-in-Fact
John T. Kim, as Trustee 11.3% 27.8M 10.2M 7.54M /s/ Brian D. Short, Attorney-in-Fact Brian D. Short, Attorney-in-Fact
David D. Kim 1.4% 3.36M 8.75K 0 /s/ Kenneth R. Hillier, Attorney in Fact Kenneth R. Hillier, Attorney in Fact
David D. Kim, as Trustee 1.1% 2.7M 1.36M 1.34M /s/ Kenneth R. Hillier, Attorney in Fact Kenneth R. Hillier, Attorney in Fact
Susan Y. Kim 17.6% 43.4M 7.21M 36.2M /s/ Brian D. Short, Attorney-in-Fact Brian D. Short, Attorney-in-Fact
Susan Y. Kim, as Trustee 8.7% 21.5M 13.5M 7.54M /s/ Brian D. Short, Attorney-in-Fact Brian D. Short, Attorney-in-Fact
Liam E. Blaney 0.1% 165K 0 165K /s/ Brian D. Short, Attorney-in-Fact Brian D. Short, Attorney-in-Fact
John T. Kim Trust of December 31, 1987 3.1% 7.59M 7.59M 0 /s/ Brian D. Short, Attorney-in-Fact John T. Kim, as Trustee
Irrevocable Deed of Trust of James J. Kim for Jacqueline Mary Panichello dated 10/3/94 0.4% 961K 0 961K /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
Irrevocable Deed of Trust of James J. Kim for Alexandra Kim Panichello dated 12/24/92 0.4% 961K 0 961K /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
Irrevocable Deed of Trust of James J. Kim for Dylan James Panichello dated 10/15/01 0.4% 961K 0 961K /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
Irrevocable Deed of Trust of James J. Kim for Allyson Lee Kim dated 10/15/01 0.4% 961K 0 961K /s/ Brian D. Short, Attorney-in-Fact John T. Kim, as Trustee
Irrevocable Deed of Trust of James J. Kim FBO Jason Lee Kim dated 11/17/03 0.4% 961K 0 961K /s/ Brian D. Short, Attorney-in-Fact John T. Kim, as Trustee
Irrevocable Deed of Trust of James J. Kim f/b/o Children of David D. Kim dated 11/11/05 0.5% 1.34M 0 1.34M /s/ Kenneth R. Hillier, Attorney in Fact David D. Kim, as Trustee
James J. Kim 2008 Trust FBO Alexandra Kim Panichello and Descendants dated 2/5/08 0.2% 547K 0 547K /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
James J. Kim 2008 Trust FBO Jacqueline Mary Panichello and Descendants dated 2/5/08 0.2% 547K 0 547K /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
James J. Kim 2008 Trust FBO Dylan James Panichello and Descendants dated 2/5/08 0.2% 547K 0 547K /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
James J. Kim 2008 Trust FBO Descendants of John T. Kim dated 2/5/08 0.4% 1.09M 0 1.09M /s/ Brian D. Short, Attorney-in-Fact John T. Kim, as Trustee
James J. Kim 2008 Trust FBO Descendants of David D. Kim dated 2/5/08 0.6% 1.36M 1.36M 0 /s/ Kenneth R. Hillier, Attorney in Fact David D. Kim, as Trustee
The James and Agnes Kim Foundation, Inc. 0.5% 1.15M 1.15M 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Secretary
915 Investments, LP 16% 39.6M 39.6M 0 /s/ Brian D. Short, Attorney-in-Fact John T. Kim, as General Partner
John T. Kim 2007 Children's Trust U/A dated 12/28/07 0.1% 315K 315K 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
Sujoda Investments, LP 1.4% 3.35M 3.35M 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Manager of Sujoda Management, LLC, its General Partner
Qualified Annuity Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd 8/29/18 0% 0 0 0 /s/ Brian D. Short, Attorney-in-Fact James J. Kim, as Trustee
John T. Kim 2012 Generation-Skipping Trust U/A Dated 12/11/12 0.8% 1.96M 1.96M 0 /s/ Brian D. Short, Attorney-in-Fact James J. Kim, as Trustee
Family Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated 2/6/18 0.2% 498K 498K 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
Family Trust under the John T. Kim 2012 Irrevocable Trust Agreement dated 12/11/12 3.2% 7.83M 7.83M 0 /s/ Brian D. Short, Attorney-in-Fact James J. Kim, as Trustee
Family Trust under the Susan Y. Kim 2012 Irrevocable Trust Agreement dated 7/26/12 0% 0 0 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
Sujochil, LP 7.9% 19.5M 0 19.5M /s/ Brian D. Short, Attorney-in-Fact John T. Kim, as General Partner
Qualified Annuity Trust Under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement dtd 04/01/20 0% 0 0 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
Agnes C. Kim 2020-1 Qualified Annuity Trust U/A Dated 12/16/20 0% 0 0 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
Alexandra Investments, LLC 0% 0 0 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, Manager
Jacqueline Investments, LLC 0% 0 0 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, Manager
Dylan Investments, LLC 0% 0 0 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, Manager
Sujoda Management, LLC 1.4% 3.35M 3.35M 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, Manager
James J. Kim 2021 Qualified Annuity Trust U/A Dated 12/15/2021 0% 0 0 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, Trustee
Susins, LLC 0.1% 165K 0 165K /s/ Brian D. Short, Attorney-in-Fact John T. Kim, Manager
2023 Grantor Retained Annuity Trust of James J. Kim dtd. 4/26/2023 1.5% 3.59M 3.59M 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
2023 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 4/26/2023 0.9% 2.3M 2.3M 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
2023 Grantor Retained Annuity Trust of Susan Y. Kim Dated 9/15/2023 0.6% 1.48M 1.48M 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
Kim Capital Partners - KCP, LLC 6.8% 16.7M 0 16.7M /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, Manager
2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024 0.8% 2M 2M 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
2024 Grantor Retained Annuity Trust of James J. Kim dtd. 8/5/2024 0.9% 2.2M 2.2M 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
2024 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 8/5/2024 0.6% 1.6M 1.6M 0 /s/ Brian D. Short, Attorney-in-Fact Susan Y. Kim, as Trustee
John T. Kim 2024 GRAT #1 dtd. 08/09/2024 0.8% 2M 2M 0 /s/ Brian D. Short, Attorney-in-Fact John T. Kim, as Trustee
John T. Kim 2024 GRAT #2 dtd. 08/09/2024 0% 100K 100K 0 /s/ Brian D. Short, Attorney-in-Fact John T. Kim, as Trustee