🕵️ Amkor Technology, Inc. ($AMKR)
SEC insider & ownership activity, last 12 months · CIK 1047127 · every row links its SEC filing
Over the last 12 months insiders sold $1.0B against $48.2M of open-market buying. John T. Kim sold $484.9M in discretionary trades (Aug–Feb). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
5 buyers, $48.2M (5 lots) · 14 sellers, $1.0B (39 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| John T. Kim | 1 | $9.6M | 1 | $484.9M | Feb 12, 2026 |
| 915 Investments, LP | 0 | – | 1 | $484.9M | Feb 12, 2026 |
| Susan Y. Kim | 1 | $9.6M | 0 | – | Aug 1, 2025 |
| James J. Kim | 0 | – | 1 | $9.6M | Aug 1, 2025 |
| Agnes C. Kim | 0 | – | 1 | $9.6M | Aug 1, 2025 |
| David D. Kim | 1 | $9.6M | 0 | – | Aug 1, 2025 |
| Sujoda Investments, LP | 1 | $9.6M | 0 | – | Aug 1, 2025 |
| Sujoda Management, LLC | 1 | $9.6M | 0 | – | Aug 1, 2025 |
| Rutten Guillaume Marie Jean | 0 | – | 8 | $7.1M | May 8, 2026 |
| Mark N Rogers | 0 | – | 10 | $4.0M | Jul 16, 2026 |
| Gil C. Tily | 0 | – | 2 | $2.1M | May 11, 2026 |
| Carolin Roger Anthony | 0 | – | 1 | $1.5M | May 5, 2026 |
| Kevin K. Engel | 0 | – | 3 | $1.4M | Feb 24, 2026 |
| Winston J. Churchill | 0 | – | 3 | $1.1M | Jun 12, 2026 |
| Farshad Haghighi | 0 | – | 2 | $1.1M | Feb 25, 2026 |
| McCourt Maryfrances | 0 | – | 1 | $920K | Dec 12, 2025 |
| Douglas A. Alexander | 0 | – | 2 | $383K | May 5, 2026 |
| Faust Megan | 0 | – | 3 | $205K | Jul 14, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| John T. Kim | 30.4% | 13D | May 1, 2026 | filing ↗ | |
| 915 Investments, LP | 12.0% | 13D | May 1, 2026 | filing ↗ | |
| Susan Y. Kim | 11.9% | 13D | May 1, 2026 | filing ↗ | |
| JOHN T. KIM, AS (trustee) | 11.2% | 13D | May 1, 2026 | filing ↗ | |
| Sujochil, LP | 7.9% | 13D | May 1, 2026 | filing ↗ | |
| Susan Y. KIM, AS (trustee) | 7.0% | 13D | May 1, 2026 | filing ↗ | |
| Liam E. Blaney | 6.8% | 13D | May 1, 2026 | filing ↗ | |
| KIM Capital Partners - KCP, LLC | 6.8% | 13D | May 1, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Mark N Rogers | $326K | Jul 16, 2026 | filing ↗ |
| Megan Faust | $70K | Jul 14, 2026 | filing ↗ |
| Mark N Rogers | $431K | Jun 16, 2026 | filing ↗ |
| Winston J Churchill | $391K | Jun 12, 2026 | filing ↗ |
| Megan Faust | $70K | Jun 9, 2026 | filing ↗ |
| Megan Faust | $65K | May 19, 2026 | filing ↗ |
| Mark N Rogers | $358K | May 18, 2026 | filing ↗ |
| Gil Tily | $580K | May 11, 2026 | filing ↗ |
| Guillaume Rutten | $3.7M | May 8, 2026 | filing ↗ |
| Roger Anthony Carolin | $1.5M | May 5, 2026 | filing ↗ |
| Douglas Alexander | $383K | May 5, 2026 | filing ↗ |
| Winston J Churchill | $535K | May 5, 2026 | filing ↗ |
| Mark N Rogers | $297K | Apr 16, 2026 | filing ↗ |
| Mark N Rogers | $223K | Mar 16, 2026 | filing ↗ |
| Farshad Haghighi | $789K | Feb 25, 2026 | filing ↗ |
| Kevin K Engel | $609K | Feb 24, 2026 | filing ↗ |
| Guillaume Rutten | $976K | Feb 24, 2026 | filing ↗ |
| Kevin K Engel | $245K | Feb 17, 2026 | filing ↗ |
| Guillaume Rutten | $459K | Feb 17, 2026 | filing ↗ |
| Mark N Rogers | $235K | Feb 17, 2026 | filing ↗ |
| Mark N Rogers | $246K | Jan 16, 2026 | filing ↗ |
| Guillaume Rutten | $531K | Jan 15, 2026 | filing ↗ |
| Mark N Rogers | $859K | Dec 16, 2025 | filing ↗ |
| Winston J Churchill | $221K | Dec 15, 2025 | filing ↗ |
| Guillaume Rutten | $448K | Dec 15, 2025 | filing ↗ |
| Kevin K Engel | $508K | Dec 12, 2025 | filing ↗ |
| Gil Tily | $929K | Dec 12, 2025 | filing ↗ |
| Maryfrances McCourt | $920K | Dec 12, 2025 | filing ↗ |
| Mark N Rogers | $634K | Nov 17, 2025 | filing ↗ |
| Guillaume Rutten | $317K | Nov 17, 2025 | filing ↗ |
| Guillaume Rutten | $307K | Oct 15, 2025 | filing ↗ |
| Guillaume Rutten | $300K | Sep 23, 2025 | filing ↗ |
| Farshad Haghighi | $295K | Sep 9, 2025 | filing ↗ |
| Mark N Rogers | $354K | Jul 31, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Jul 27, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 27, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 21, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 21, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 13, 2026 | filing ↗ |
| Material agreement (1.01) | Apr 30, 2026 | filing ↗ |
| New financial obligation (2.03) | Apr 30, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Apr 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 30, 2026 | filing ↗ |
| Other events (8.01) | Apr 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 30, 2026 | filing ↗ |
| Other events (8.01) | Apr 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 30, 2026 | filing ↗ |
| Earnings (2.02) | Apr 27, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 27, 2026 | filing ↗ |
| Other events (8.01) | Feb 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 12, 2026 | filing ↗ |
| Earnings (2.02) | Feb 9, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 9, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 2, 2026 | filing ↗ |
| Officer/director changes (5.02) | Oct 28, 2025 | filing ↗ |
| Earnings (2.02) | Oct 21, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 21, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Oct 21, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 21, 2025 | filing ↗ |
| Material agreement (1.01) | Sep 22, 2025 | filing ↗ |
| New financial obligation (2.03) | Sep 22, 2025 | filing ↗ |
| Other events (8.01) | Sep 22, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 22, 2025 | filing ↗ |
| Other events (8.01) | Sep 8, 2025 | filing ↗ |