Through the 90-day period concluding January 16, 2026, Amkor Technology's top three insider stakeholders include Other Investments, Lp 915 (39.59Mn shares), TenPercentOwner John T Kim (15.44Mn shares), Other Agnes C Kim (10.74Mn shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Investments, Lp 915 | 39,594,980 | 06 Sep, 2023 | |
| John T Kim | 15,441,433 | 06 Nov, 2025 | |
| Agnes C Kim | 10,737,355 | 23 Dec, 2025 | |
| Susan Y Kim | 7,214,494 | 23 Dec, 2025 | |
| David D Kim | 3,798,225 | 31 Dec, 2021 | |
| Investments, Lp Sujoda | 3,789,479 | 05 Aug, 2025 | |
| Management, Llc Sujoda | 3,789,479 | 05 Aug, 2025 | |
| Grantor Retained Annuity Trust Of James J. Kim Dtd. 8/5/2024 2024 | 1,235,000 | 24 Nov, 2025 | |
| T. Kim 2024 Grat #1 Dtd. 08/09/2024 John | 1,194,000 | 06 Nov, 2025 | |
| Grantor Retained Annuity Trust Of Susan Y. Kim Dtd. 8/5/2024 2024 | 1,124,000 | 24 Nov, 2025 | |
| Grantor Retained Annuity Trust Of Agnes C. Kim Dtd. 8/5/2024 2024 | 895,000 | 24 Nov, 2025 | |
| James J Kim | 786,645 | 23 Dec, 2025 | |
| Guillaume Marie Jean Rutten | President And Ceo | 345,391 | 05 Jan, 2026 |
| Llc Susins, | 164,678 | 20 Jan, 2022 | |
| Y. Kim 2012 Generation-Skipping Trust U/A Dated December 11, 2012 Susan | 164,678 | 24 Jan, 2022 | |
| Gil C. Tily | 123,806 | 16 Dec, 2025 | |
| Robert Randolph Morse | 117,355 | 16 May, 2025 | |
| David N Watson | 102,980 | 16 May, 2025 | |
| Megan Faust | Cfo | 97,038 | 05 Jan, 2026 |
| Roger Anthony Carolin | 94,409 | 16 May, 2025 | |
| T. Kim 2024 Grat #2 Dtd. 08/09/2024 John | 59,250 | 06 Nov, 2025 | |
| Maryfrances Mccourt | 55,918 | 16 Dec, 2025 | |
| Daniel Jl Liao | 40,804 | 16 May, 2025 | |
| John Charles Stone | Executive Vice President | 31,038 | 15 Feb, 2022 |
| Douglas A Alexander | 29,109 | 16 May, 2025 | |
| Winston J Churchill | 25,888 | 17 Dec, 2025 | |
| Mark N Rogers | Evp & General Counsel | 23,862 | 17 Dec, 2025 |
| Sung Shin | Executive Vice President | 15,418 | 05 Jun, 2023 |
| Farshad Haghighi | Executive Vice President | 8,354 | 18 Nov, 2025 |
| Kevin Engel | Executive Vice President | 5,316 | 05 Jan, 2026 |
| John D Liu | 2,983 | 16 May, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 31 Dec, 2025 | Guillaume Marie Jean Rutten | Common Stock | A | 8,692 | $0.00 | 345,391 | D | M |
| 31 Dec, 2025 | Megan Faust | Common Stock | A | 8,692 | $0.00 | 100,763 | D | M |
| 31 Dec, 2025 | Megan Faust | Common Stock | D | 3,725 | $39.48 | 97,038 | D | F |
| 31 Dec, 2025 | Kevin Engel | Common Stock | A | 8,692 | $0.00 | 9,041 | D | M |
| 31 Dec, 2025 | Kevin Engel | Common Stock | D | 3,725 | $39.48 | 5,316 | D | F |
| 26 Dec, 2025 | James J Kim | Common Stock | A | 725,000 | $0.00 | 725,000 | I | G |
| 26 Dec, 2025 | Agnes C Kim | Common Stock | A | 725,000 | $0.00 | 10,737,355 | I | G |
| 26 Dec, 2025 | Susan Y Kim | Common Stock | D | 725,000 | $0.00 | 1,124,000 | I | G |
| 26 Dec, 2025 | John T Kim | Common Stock | A | 725,000 | $0.00 | 9,846,944 | I | G |
| 26 Dec, 2025 | Grantor Retained Annuity Trust Of Susan Y. Kim Dated 9/15/2023 2023 | Common Stock | D | 725,000 | $0.00 | 0 | D | G |
| 19 Dec, 2025 | James J Kim | Common Stock | D | 3,244,594 | $0.00 | 61,645 | D | G |
| 19 Dec, 2025 | James J Kim | Common Stock | D | 2,538,000 | $0.00 | 0 | I | G |
| 19 Dec, 2025 | Agnes C Kim | Common Stock | D | 3,244,594 | $0.00 | 10,012,355 | I | G |
| 19 Dec, 2025 | Agnes C Kim | Common Stock | D | 2,538,000 | $0.00 | 0 | D | G |
| 19 Dec, 2025 | Susan Y Kim | Common Stock | A | 3,244,594 | $0.00 | 6,090,494 | D | G |
| 19 Dec, 2025 | Susan Y Kim | Common Stock | A | 2,538,000 | $0.00 | 3,244,594 | I | G |
| 16 Dec, 2025 | Mark N Rogers | Common Stock | A | 20,000 | $7.40 | 43,862 | D | M |
| 16 Dec, 2025 | Mark N Rogers | Common Stock | D | 20,000 | $42.95 | 23,862 | D | S |
| 15 Dec, 2025 | Winston J Churchill | Common Stock | A | 5,000 | $19.39 | 30,888 | D | M |
| 15 Dec, 2025 | Winston J Churchill | Common Stock | D | 5,000 | $44.29 | 25,888 | D | S |