SCHEDULE 13D/A

Amkor Technology Inc

Common Stock, par value $0.001 per share · CUSIP: 031652100

Event date: 2026-02-12

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• James J. KimReported CIK 0001158839

  Shares: 511,645 · Class: 0.2%

• James J. Kim, as Trustee

  Shares: 10,511,032 · Class: 4.3%

• Agnes C. Kim

  Shares: 0 · Class: 0.0%

• John T. Kim

  Shares: 75,339,103 · Class: 30.5%

• John T. Kim, as Trustee

  Shares: 27,711,015 · Class: 11.2%

• David D. Kim

  Shares: 3,798,225 · Class: 1.5%

• David D. Kim, as Trustee

  Shares: 2,698,513 · Class: 1.1%

• Susan Y. Kim

  Shares: 46,195,450 · Class: 18.7%

• Susan Y. Kim, as Trustee

  Shares: 17,389,326 · Class: 7.0%

• Liam E. Blaney

  Shares: 164,678 · Class: 0.1%

• John T. Kim Trust of December 31, 1987

  Shares: 7,594,001 · Class: 3.1%

• Irrevocable Deed of Trust of James J. Kim for Jacqueline Mary Panichello dated 10/3/94

  Shares: 961,113 · Class: 0.4%

• Irrevocable Deed of Trust of James J. Kim for Alexandra Kim Panichello dated 12/24/92

  Shares: 961,113 · Class: 0.4%

• Irrevocable Deed of Trust of James J. Kim for Dylan James Panichello dated 10/15/01

  Shares: 961,113 · Class: 0.4%

• Irrevocable Deed of Trust of James J. Kim for Allyson Lee Kim dated 10/15/01

  Shares: 961,113 · Class: 0.4%

• Irrevocable Deed of Trust of James J. Kim FBO Jason Lee Kim dated 11/17/03

  Shares: 961,113 · Class: 0.4%

• Irrevocable Deed of Trust of James J. Kim f/b/o Children of David D. Kim dated 11/11/05

  Shares: 1,335,113 · Class: 0.5%

• James J. Kim 2008 Trust FBO Alexandra Kim Panichello and Descendants dated 2/5/08

  Shares: 546,787 · Class: 0.2%

• James J. Kim 2008 Trust FBO Jacqueline Mary Panichello and Descendants dated 2/5/08

  Shares: 546,787 · Class: 0.2%

• James J. Kim 2008 Trust FBO Dylan James Panichello and Descendants dated 2/5/08

  Shares: 546,787 · Class: 0.2%

• James J. Kim 2008 Trust FBO Descendants of John T. Kim dated 2/5/08

  Shares: 1,093,574 · Class: 0.4%

• James J. Kim 2008 Trust FBO Descendants of David D. Kim dated 2/5/08

  Shares: 1,363,400 · Class: 0.6%

• The James and Agnes Kim Foundation, Inc.

  Shares: 1,150,000 · Class: 0.5%

• 915 Investments, LP

  Shares: 29,594,980 · Class: 12.0%

• John T. Kim 2007 Children's Trust U/A dated 12/28/07

  Shares: 315,000 · Class: 0.1%

• Sujoda Investments, LP

  Shares: 3,789,479 · Class: 1.5%

• John T. Kim 2012 Generation-Skipping Trust U/A Dated 12/11/12

  Shares: 1,957,350 · Class: 0.8%

• Family Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated 2/6/18

  Shares: 498,232 · Class: 0.2%

• Family Trust under the John T. Kim 2012 Irrevocable Trust Agreement dated 12/11/12

  Shares: 7,828,682 · Class: 3.2%

• Sujochil, LP

  Shares: 19,484,809 · Class: 7.9%

• Sujoda Management, LLC

  Shares: 3,789,479 · Class: 1.5%

• Susins, LLC

  Shares: 164,678 · Class: 0.1%

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

  Shares: 0 · Class: 0.0%

• 2023 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 4/26/2023

  Shares: 0 · Class: 0.0%

• 2023 Grantor Retained Annuity Trust of Susan Y. Kim Dated 9/15/2023

  Shares: 0 · Class: 0.0%

• Kim Capital Partners - KCP, LLC

  Shares: 16,710,668 · Class: 6.8%

• 2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024

  Shares: 1,124,000 · Class: 0.5%

• 2024 Grantor Retained Annuity Trust of James J. Kim dtd. 8/5/2024

  Shares: 1,235,000 · Class: 0.5%

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

  Shares: 895,000 · Class: 0.4%

• John T. Kim 2024 GRAT #1 dtd. 08/09/2024

  Shares: 1,194,000 · Class: 0.5%

• John T. Kim 2024 GRAT #2 dtd. 08/09/2024

  Shares: 59,250 · Class: 0.0%

• Susan Y. Kim 2023 Family Distribution Trust

  Shares: 725,000 · Class: 0.3%

• 2025 Grantor Retained Annuity Trust No. 1 of Agnes C. Kim

  Shares: 2,538,000 · Class: 1.0%

• 2025 Grantor Retained Annuity Trust No.1 of James J. Kim

  Shares: 3,244,594 · Class: 1.3%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.