Amkor Technology, Inc.
A maker of outsourced semiconductor assembly and test services, Amkor packages and tests the chips that power smartphones, tablets, cars, and computers for customers like Apple and Qualcomm. Founded in 1968 by Joo-Jin (James) Kim in Pennsylvania, the company began as a bridge between U.S. chip design and his father's Korean manufacturing operations. Its name blends "America" and "Korea," reflecting that two-country origin story.
Granted 294.1K · Bought 23.52M · Sold 16.00M
Granted 1.09M · Bought 24.89M · Sold 6.00M
Sold 20.00M
Granted 435.8K · Bought 3.86M · Sold 23.72M
Granted 75.5K · Bought 1.86M · Sold 15.39M
Bought 2.67M · Sold 3.72M
Granted 6.19M · Bought 1.31M · Sold 3.71M
Bought 1.31M · Sold 3.71M
Bought 1.00M · Sold 150.0K
Sold 1.63M
Sold 816.6K
Sold 816.6K
Sold 816.6K
Granted 1.86M · Sold 1.31M
Granted 1.44M · Bought 153.0K · Sold 750.4K
Granted 140.0K
Granted 143.1K · Bought 10.0K
Granted 587.2K · Sold 347.0K
Granted 141.6K
Granted 504.7K · Sold 198.8K
Granted 283.1K · Bought 52.4K · Sold 192.4K
Granted 80.0K
Granted 141.2K · Bought 2.5K · Sold 69.2K
Granted 106.0K · Sold 4.6K
Granted 60.0K
Granted 47.5K · Bought 10.0K · Sold 40.0K
Granted 59.0K · Sold 9.0K
Granted 240.6K · Bought 2.5K · Sold 145.0K
Granted 49.5K
Granted 127.5K · Bought 24.0K · Sold 27.0K
Granted 439.7K · Sold 433.1K
Granted 42.8K · Sold 5.0K
Granted 386.6K · Bought 27.4K · Sold 407.6K
Granted 132.5K · Sold 116.2K
Granted 1.3K · Sold 17.8K
Granted 22.5K · Sold 5.0K
Granted 10.0K
Granted 5.0K · Bought 5.0K
Granted 82.2K · Sold 44.0K
Granted 131.2K · Sold 84.7K
Granted 35.2K · Sold 17.8K
Granted 3.0K
Sold 38.97M
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Kim James J +1 co-filerDirector · 2 transactions | — | 135.51Mas of Jun 2013 | — | — | — |
| Kim John T10% owner, Member of 10% owner group (6) · 86 transactions | — | 104.87M | 294.1K | 23.52M | 16.00M |
| Kim Susan YDirector, 10% owner, Member of 10% owner group (5) · 152 transactions | — | 78.09M | 1.09M | 24.89M | 6.00M |
| 915 Investments, LPMember of 10% owner group (2) · 2 transactions | — | 29.59M | — | — | 20.00M |
| Kim James J10% owner, Member of 10% owner group (4) · 157 transactions | — | 23.77M | 435.8K | 3.86M | 23.72M |
| Kim Agnes CMember of 10% owner group (3) · 55 transactions | — | 21.45M | 75.5K | 1.86M | 15.39M |
| David D Kim Trust Of 12/31/87Reporting owner · 1 transaction | — | 19.48Mas of Aug 2011 | — | — | — |
| James J. Kim GRAT Remainder Trust UA Dated November 14, 2008Ex. 99.1 · 2 transactions | — | 12.38Mas of Jan 2011 | — | — | — |
| Susan Y Kim Trust Of 12/31/87Exhibit 99.1 · 2 transactions | — | 11.28Mas of Aug 2012 | — | — | — |
| Family Trust Under the John T. Kim 2012 Irrevocable Trust Agreement Dated 12/11/12Exhibit 99.1 · 1 transaction | — | 7.83Mas of Feb 2019 | — | — | — |
| John T Kim Trust Of 12/31/87Exhibit 99.1 · 8 transactions | — | 7.25Mas of Mar 2017 | — | — | — |
| Kim David D +9 co-filersDirector, See Exhibit 99.1 · 13 transactions | — | 6.71Mas of Jan 2011 | — | — | — |
| Kim David DMember of 10% owner group (5) · 11 transactions | — | 6.50Mas of Aug 2025 | — | 2.67M | 3.72M |
| SUJODA Investments, LPMember of 10% owner group (2) · 6 transactions | — | 3.79Mas of Aug 2025 | 6.19M | 1.31M | 3.71M |
| Sujoda Management, LLCMember of 10% owner group (4) · 5 transactions | — | 3.79Mas of Aug 2025 | — | 1.31M | 3.71M |
| Family Trust Under the Susan Y. Kim 2012 Irrevocable Trust Dated 7/26/12Exhibit 99.1 · 2 transactions | — | 3.34Mas of Aug 2020 | — | — | — |
| John T. Kim Generation-Skipping TrustExhibit 99.1 · 1 transaction | — | 1.96Mas of Feb 2013 | — | — | — |
| Qualified Annuity Trust under the James J. Kim 2018-1 Qualified Annuity Trust Agreement dtd 8/31/18Exhibit 99.1 · 3 transactions | — | 1.58Mas of Dec 2020 | — | — | — |
| 2024 Grantor Retained Annuity Trust of James J. Kim dtd. 8/5/2024Member of 10% owner group (2) · 1 transaction | — | 1.24M | — | — | — |
| John T. Kim 2024 GRAT #1 dtd. 08/09/2024Member of 10% owner group · 1 transaction | — | 1.19M | — | — | — |
| James & Agnes Kim Foundation, Inc.See Exhibit No. EX-99.1 · 6 transactions | — | 1.15Mas of Jun 2009 | — | 1.00M | 150.0K |
| 2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024Member of 10% owner group (2) · 1 transaction | — | 1.12M | — | — | — |
| James J. Kim 2008 Trust FBO Descendants of John T. KimSee Exhibit 99.1 · 1 transaction | — | 1.09Mas of Dec 2020 | — | — | 1.63M |
| Qualified Annuity Trust under the James J. Kim 2019-1 Qualified Annuity Trust Agreement dtd September10,2019Member of 10% owner group (4) · 6 transactions | — | 1.05Mas of Dec 2022 | — | — | — |
| John T. Kim 2018 Irrevocable Trust Agreement Dated 2/6/18Member of 10% owner group (2) · 4 transactions | — | 1.03Mas of Jul 2021 | — | — | — |
| Agnes C. Kim 2020-1 Qualified Annuity Trust Under Agreement Dated 12/16/20Member of 10% owner group (4) · 5 transactions | — | 972.9Kas of Dec 2023 | — | — | — |
| 2024 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 8/5/2024Member of 10% owner group (2) · 1 transaction | — | 895.0K | — | — | — |
| Qualified Annuity Trust under the James J. Kim 2018-1 Qualified Annuity Trust Agreement dtd 8/30/18Member of 10% owner group (4) · 3 transactions | — | 626.2Kas of Oct 2021 | — | — | — |
| James J. Kim 2008 Trust FBO Alexandra Kim Panichello & DescendantsSee Exhibit 99.1 · 1 transaction | — | 546.8Kas of Dec 2020 | — | — | 816.6K |
| James J. Kim 2008 Trust FBO Dylan James Panichello & DescendantsSee Exhibit 99.1 · 1 transaction | — | 546.8Kas of Dec 2020 | — | — | 816.6K |
| James J. Kim 2008 Trust FBO Jacqueline Mary Panichello & DescendantsSee Exhibit 99.1 · 1 transaction | — | 546.8Kas of Dec 2020 | — | — | 816.6K |
| Rutten Guillaume Marie JeanDirector · 146 transactions | — | 503.0K | 1.86M | — | 1.31M |
| John T. Kim 2007 Children's Trust UA Dated December 28, 2007See Exhibit 99.1 · 1 transaction | — | 315.0Kas of Jan 2011 | — | — | — |
| Kelley Stephen DouglasPresident and CEO, Director · 47 transactions | — | 286.2Kas of May 2020 | 1.44M | 153.0K | 750.4K |
| 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023Member of 10% owner group (3) · 4 transactions | — | 280.0Kas of Aug 2025 | — | — | — |
| Susan Y. Kim 2012 Generation-Skipping Trust U/A Dated December 11, 2012Member of 10% owner group (2) · 1 transaction | — | 164.7Kas of Jan 2022 | — | — | — |
| Susins, LLCMember of 10% owner group (2) · 1 transaction | — | 164.7Kas of Jan 2022 | — | — | — |
| Joyce Kenneth TPresident & CEO, Director · 4 transactions | — | 162.2Kas of Nov 2012 | 140.0K | — | — |
| Morse Robert RandolphDirector · 18 transactions | — | 135.0K | 143.1K | 10.0K | — |
| Faust MeganCFO · 148 transactions | — | 132.1K | 587.2K | — | 347.0K |
| Watson David NDirector · 17 transactions | — | 130.7K | 141.6K | — | — |
| Tily Gil C.Director · 89 transactions | — | 118.7K | 504.7K | — | 198.8K |
| Carolin Roger AnthonyDirector · 44 transactions | — | 94.4K | 283.1K | 52.4K | 192.4K |
| Lamble MikeExecutive Vice President · 14 transactions | — | 80.2Kas of Nov 2012 | 80.0K | — | — |
| McCourt MaryFrancesDirector · 22 transactions | — | 65.8K | 141.2K | 2.5K | 69.2K |
| John T. Kim 2024 GRAT #2 dtd. 08/09/2024Member of 10% owner group · 1 transaction | — | 59.3K | — | — | — |
| Solomon JoanneExecutive VP & CFO · 68 transactions | — | 57.0Kas of Aug 2016 | 106.0K | — | 4.6K |
| Tily Gil ColemanCAO & General Counsel · 9 transactions | — | 56.7Kas of Aug 2011 | 60.0K | — | — |
| Zug James WDirector · 12 transactions | — | 49.2Kas of May 2017 | 47.5K | 10.0K | 40.0K |
| Fusaro James MacMillanExecutive Vice President · 10 transactions | — | 47.7Kas of May 2011 | 59.0K | — | 9.0K |
| Rogers Mark NEVP & General Counsel · 63 transactions | — | 43.9K | 240.6K | 2.5K | 145.0K |
| Liao Daniel JLDirector · 7 transactions | — | 40.8Kas of May 2025 | 49.5K | — | — |
| Osborne JohnDirector · 28 transactions | — | 37.8Kas of May 2017 | 127.5K | 24.0K | 27.0K |
| Stone John CharlesExecutive Vice President · 69 transactions | — | 33.0Kas of Feb 2022 | 439.7K | — | 433.1K |
| Alexander Douglas ADirector · 11 transactions | — | 29.1K | 42.8K | — | 5.0K |
| Churchill Winston JDirector · 101 transactions | — | 28.8K | 386.6K | 27.4K | 407.6K |
| Kim Joo HoExecutive Vice President · 16 transactions | — | 22.5Kas of Aug 2014 | 132.5K | — | 116.2K |
| Lee Choon HeungExecutive Vice President · 8 transactions | — | 16.6Kas of Aug 2015 | 1.3K | — | 17.8K |
| Shin SungExecutive Vice President · 4 transactions | — | 15.4Kas of Jun 2023 | 22.5K | — | 5.0K |
| Larson Eric RExecutive Vice President · 1 transaction | — | 14.0Kas of Feb 2010 | 10.0K | — | — |
| Papadakis ConstantineDirector · 2 transactions | — | 10.0Kas of Dec 2008 | 5.0K | 5.0K | — |
| Engel KevinExecutive Vice President · 61 transactions | — | 9.0K | 82.2K | — | 44.0K |
| Haghighi FarshadExecutive Vice President · 77 transactions | — | 8.4K | 131.2K | — | 84.7K |
| Engel Kevin K.President and CEO, Director · 16 transactions | — | 7.9K | 35.2K | — | 17.8K |
| Liu John DDirector · 1 transaction | — | 3.0Kas of May 2025 | 3.0K | — | — |
| David D Kim Trust Of 12/31/87 +1 co-filerSee Exhibit 99.1 · 2 transactions | — | 0as of Jan 2017 | — | — | 38.97M |
| 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023Member of 10% owner group (3) · 4 transactions | — | 0as of Aug 2025 | — | — | — |
| 2023 Grantor Retained Annuity Trust of Susan Y. Kim Dated 9/15/2023Member of 10% owner group (2) · 3 transactions | — | 0 | — | — | — |
| Alexandra Investments, LLCMember of 10% owner group (2) · 2 transactions | — | 0as of Nov 2023 | — | — | — |
| Blaney Liam EMember of 10% owner group (4) · 3 transactions | — | 0as of Nov 2023 | — | — | — |
| Dylan Investments, LLCMember of 10% owner group (2) · 2 transactions | — | 0as of Nov 2023 | — | — | — |
| Family Trust Under the Susan Y. Kim 2012 Irrevocable Trust Agreement Dated 7/26/12Member of 10% owner group (2) · 1 transaction | — | 0as of Nov 2023 | — | — | — |
| Family Trust Under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement Dated 04/01/2020Member of 10% owner group (2) · 1 transaction | — | 0as of Nov 2023 | — | — | — |
| Family Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd. 8/29/18Member of 10% owner group (2) · 1 transaction | — | 0as of Nov 2023 | — | — | — |
| Irrevocable Deed of Trust of Susan Y. Kim dated 4/16/98 For the Benefit of Dylan James PanichelloSee Exhibit 99.1 · 1 transaction | — | 0as of Sep 2021 | — | — | — |
| Irrevocable Deed of Trust of Susan Y. Kim dated 4/16/98 For the Benefit of Jacqueline Mary PanichelloSee Exhibit 99.1 · 1 transaction | — | 0as of Sep 2021 | — | — | — |
| Jacqueline Investments, LLCMember of 10% owner group (2) · 2 transactions | — | 0as of Nov 2023 | — | — | — |
| James J. Kim 2013 Qualified Annuity Trust U/A Dated May 17, 2013Exhibit 99.1 · 8 transactions | — | 0as of Oct 2018 | — | — | — |
| James J. Kim 2014 Qualified Annuity TrustExhibit 99.1 · 7 transactions | — | 0as of Mar 2020 | — | — | — |
| James J. Kim 2021 Qualified Annuity Trust U/A Dated 12/15/2021Member of 10% owner group (3) · 6 transactions | — | 0as of Jan 2025 | — | — | — |
| John T. Kim 2012 Irrevocable TrustExhibit 99.1 · 7 transactions | — | 0as of Jul 2018 | — | — | — |
| Qualified Annuity Trust under the James J. Kim 2020-1 Annuity Trust Agreement dated 04/01/2020Member of 10% owner group (3) · 5 transactions | — | 0as of Jul 2023 | — | — | — |
| Qualified Annuity Trust under the John T. Kim 2018 Irrevocable Trust Agreement Dated 2/6/18Member of 10% owner group (2) · 3 transactions | — | 0as of Jul 2023 | — | — | — |
| Qualified Annuity Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd August 29, 2018Member of 10% owner group (2) · 7 transactions | — | 0as of Oct 2023 | — | — | — |
| Qualified Annuity Trust under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement dated 04/01/2020Member of 10% owner group (2) · 4 transactions | — | 0as of Sep 2023 | — | — | — |
| Susan Y. Kim 2012 Irrevocable TrustExhibit 99.1 · 8 transactions | — | 0as of Mar 2018 | — | — | — |
| Susan Y. Kim 2015 Irrevocable Trust U/A Dated March 16, 2015Exhibit 99.1 · 7 transactions | — | 0as of Aug 2020 | — | — | — |
| Trust of Kim Susan Y dated 4/16/98 for the benefit of Alexandra PanichelloSee Exhibit 99.1 · 1 transaction | — | 0as of Sep 2021 | — | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over all recorded history: -78.98M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.