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 80.0K · Bought 1.31M · Sold 11.92M
Granted 1.05M · Bought 1.31M · Sold 1.92M
Sold 20.00M
Granted 114.9K · Bought 3.71M · Sold 11.31M
Granted 75.5K · Bought 1.86M · Sold 11.31M
Bought 1.31M · Sold 3.71M
Bought 1.31M · Sold 3.71M
Bought 1.31M · Sold 3.71M
Granted 1.01M · Sold 838.1K
Granted 103.5K
Granted 399.0K · Sold 166.5K
Granted 102.0K
Granted 82.0K · Sold 83.8K
Granted 103.5K · Sold 40.0K
Granted 53.4K · Sold 20.0K
Granted 184.1K · Sold 95.0K
Granted 32.1K
Granted 9.4K · Sold 9.4K
Granted 19.7K · Sold 5.0K
Granted 132.0K · Sold 108.9K
Granted 22.5K · Sold 5.0K
Granted 82.2K · Sold 44.0K
Granted 131.2K · Sold 84.7K
Granted 35.2K · Sold 17.8K
Granted 3.0K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Kim John T10% owner, Member of 10% owner group (6) · 33 transactions | — | 104.87M | 80.0K | 1.31M | 11.92M |
| Kim Susan YDirector, 10% owner, Member of 10% owner group (5) · 64 transactions | — | 78.09M | 1.05M | 1.31M | 1.92M |
| 915 Investments, LPMember of 10% owner group (2) · 2 transactions | — | 29.59M | — | — | 20.00M |
| Kim James J10% owner, Member of 10% owner group (4) · 84 transactions | — | 23.77M | 114.9K | 3.71M | 11.31M |
| Kim Agnes CMember of 10% owner group (3) · 49 transactions | — | 21.45M | 75.5K | 1.86M | 11.31M |
| Kim David DMember of 10% owner group (5) · 5 transactions | — | 6.50Mas of Aug 2025 | — | 1.31M | 3.71M |
| SUJODA Investments, LPMember of 10% owner group (2) · 5 transactions | -38.8% | 3.79Mas of Aug 2025 | — | 1.31M | 3.71M |
| Sujoda Management, LLCMember of 10% owner group (4) · 5 transactions | — | 3.79Mas of Aug 2025 | — | 1.31M | 3.71M |
| 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 | — | — | — |
| 2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024Member of 10% owner group (2) · 1 transaction | — | 1.12M | — | — | — |
| Qualified Annuity Trust under the James J. Kim 2019-1 Qualified Annuity Trust Agreement dtd September10,2019Member of 10% owner group (4) · 4 transactions | -67.9% | 1.05Mas of Dec 2022 | — | — | — |
| Agnes C. Kim 2020-1 Qualified Annuity Trust Under Agreement Dated 12/16/20Member of 10% owner group (4) · 5 transactions | -76.2% | 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 | — | — | — |
| Rutten Guillaume Marie JeanDirector · 91 transactions | +24.2% | 503.0K | 1.01M | — | 838.1K |
| 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 | — | — | — |
| Morse Robert RandolphDirector · 9 transactions | +172.2% | 135.0K | 103.5K | — | — |
| Faust MeganCFO · 112 transactions | +565.9% | 132.1K | 399.0K | — | 166.5K |
| Watson David NDirector · 9 transactions | +230.1% | 130.7K | 102.0K | — | — |
| Tily Gil C.Director · 12 transactions | -8.1% | 118.7K | 82.0K | — | 83.8K |
| Carolin Roger AnthonyDirector · 9 transactions | +58.4% | 94.4K | 103.5K | — | 40.0K |
| McCourt MaryFrancesDirector · 6 transactions | +60.2% | 65.8K | 53.4K | — | 20.0K |
| John T. Kim 2024 GRAT #2 dtd. 08/09/2024Member of 10% owner group · 1 transaction | — | 59.3K | — | — | — |
| Rogers Mark NEVP & General Counsel · 59 transactions | +1656.2% | 43.9K | 184.1K | — | 95.0K |
| Liao Daniel JLDirector · 4 transactions | +134.4% | 40.8Kas of May 2025 | 32.1K | — | — |
| Stone John CharlesExecutive Vice President · 4 transactions | -23% | 33.0Kas of Feb 2022 | 9.4K | — | 9.4K |
| Alexander Douglas ADirector · 6 transactions | +26.1% | 29.1K | 19.7K | — | 5.0K |
| Churchill Winston JDirector · 19 transactions | +100% | 28.8K | 132.0K | — | 108.9K |
| Shin SungExecutive Vice President · 4 transactions | +371.8% | 15.4Kas of Jun 2023 | 22.5K | — | 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 | — | — |
| 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 2021 Qualified Annuity Trust U/A Dated 12/15/2021Member of 10% owner group (3) · 6 transactions | — | 0as of Jan 2025 | — | — | — |
| Qualified Annuity Trust under the James J. Kim 2020-1 Annuity Trust Agreement dated 04/01/2020Member of 10% owner group (3) · 5 transactions | -100% | 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) · 4 transactions | -100% | 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) · 3 transactions | -100% | 0as of Sep 2023 | — | — | — |
| 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 the last 5 years: -56.99M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.