SEC Form 4 · Updated Daily
AMKR
— AMKOR TECHNOLOGY, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| KIM AGNES C | Reporting Owner | 11,187,355 | 2026-07-20 | M |
| KIM SUSAN Y | 10%+ Owner · Director | 6,120,387 | 2026-06-12 | A |
| KIM JAMES J | 10%+ Owner | 511,645 | 2026-07-20 | M |
| Rutten Guillaume Marie Jean | Director | 461,732 | 2026-08-06 | S |
| Faust Megan | Officer | 134,105 | 2026-09-08 | S |
| WATSON DAVID N | Director | 130,650 | 2026-05-13 | M |
| Tily Gil C. | Director | 118,699 | 2026-05-13 | M |
| McCourt MaryFrances | Director | 65,811 | 2026-05-13 | M |
| ROGERS MARK N | Officer | 38,904 | 2026-08-17 | S |
| ALEXANDER DOUGLAS A | Director | 29,109 | 2026-08-07 | S |
| CHURCHILL WINSTON J | Director | 28,681 | 2026-07-30 | G |
| Engel Kevin K. | Director · Officer | 9,666 | 2026-07-30 | S |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-08 | Faust Megan | Open-market sale | 1,000 | $49.05 | 134,105 |
| 2026-08-17 | ROGERS MARK N | Option exercise (derivative) | 5,000 | $0.00 | 70,000 |
| 2026-08-17 | ROGERS MARK N | Open-market sale | 5,000 | $59.78 | 38,904 |
| 2026-08-17 | ROGERS MARK N | Option exercise | 5,000 | $7.40 | 43,904 |
| 2026-08-11 | Faust Megan | Open-market sale | 1,000 | $54.45 | 135,105 |
| 2026-08-07 | ALEXANDER DOUGLAS A | Option exercise (derivative) | 5,000 | $0.00 | 14,657 |
| 2026-08-07 | ALEXANDER DOUGLAS A | Open-market sale | 5,000 | $55.81 | 29,109 |
| 2026-08-07 | ALEXANDER DOUGLAS A | Option exercise | 5,000 | $8.51 | 34,109 |
| 2026-08-06 | Rutten Guillaume Marie Jean | Open-market sale | 25,000 | $54.50 | 461,732 |
| 2026-08-05 | Rutten Guillaume Marie Jean | Open-market sale | 25,000 | $55.35 | 486,732 |
| 2026-07-30 | Engel Kevin K. | Open-market sale | 3,221 | $47.00 | 9,666 |
| 2026-07-30 | CHURCHILL WINSTON J | Gift | 100 | $0.00 | 28,681 |
| 2026-07-20 | KIM JAMES J | Option exercise (derivative) | 200,000 | $0.00 | 0 |
| 2026-07-20 | KIM JAMES J | Option exercise | 250,000 | $9.48 | 511,645 |
| 2026-07-20 | KIM JAMES J | Option exercise | 200,000 | $9.86 | 261,645 |
| 2026-07-20 | KIM AGNES C | Option exercise | 250,000 | $9.48 | 11,187,355 |
| 2026-07-20 | KIM AGNES C | Option exercise | 200,000 | $9.86 | 10,937,355 |
| 2026-07-16 | ROGERS MARK N | Option exercise (derivative) | 5,000 | $0.00 | 75,000 |
| 2026-07-16 | ROGERS MARK N | Open-market sale | 5,000 | $65.12 | 38,904 |
| 2026-07-16 | ROGERS MARK N | Option exercise | 5,000 | $7.40 | 43,904 |
| 2026-07-14 | Faust Megan | Open-market sale | 1,000 | $69.91 | 136,105 |
| 2026-06-30 | Rutten Guillaume Marie Jean | Option exercise (derivative) | 8,692 | $0.00 | 0 |
| 2026-06-30 | Rutten Guillaume Marie Jean | Option exercise | 8,692 | $0.00 | 511,732 |
| 2026-06-30 | Faust Megan | Option exercise (derivative) | 8,692 | $0.00 | 0 |
| 2026-06-30 | Faust Megan | Tax withholding | 3,725 | $86.23 | 137,105 |
| 2026-06-30 | Faust Megan | Option exercise | 8,692 | $0.00 | 140,830 |
| 2026-06-30 | Engel Kevin K. | Option exercise (derivative) | 8,692 | $0.00 | 0 |
| 2026-06-30 | Engel Kevin K. | Tax withholding | 3,725 | $86.23 | 12,887 |
| 2026-06-30 | Engel Kevin K. | Option exercise | 8,692 | $0.00 | 16,612 |
| 2026-06-23 | ALEXANDER DOUGLAS A | Grant / award (derivative) | 2.517 | $0.00 | 2,615.517 |
| 2026-06-23 | ALEXANDER DOUGLAS A | Grant / award (derivative) | 9.428 | $0.00 | 9,902.485 |
| 2026-06-23 | ALEXANDER DOUGLAS A | Grant / award (derivative) | 8.165 | $0.00 | 8,903.953 |
| 2026-06-23 | ALEXANDER DOUGLAS A | Grant / award (derivative) | 8.385 | $0.00 | 9,246.816 |
| 2026-06-23 | Carolin Roger Anthony | Grant / award (derivative) | 2.517 | $0.00 | 2,615.517 |
| 2026-06-23 | Carolin Roger Anthony | Grant / award (derivative) | 9.428 | $0.00 | 9,902.485 |
| 2026-06-23 | Carolin Roger Anthony | Grant / award (derivative) | 8.165 | $0.00 | 8,903.953 |
| 2026-06-23 | CHURCHILL WINSTON J | Grant / award (derivative) | 2.517 | $0.00 | 2,615.517 |
| 2026-06-23 | Liao Daniel JL | Grant / award (derivative) | 2.517 | $0.00 | 2,615.517 |
| 2026-06-23 | Liao Daniel JL | Grant / award (derivative) | 9.428 | $0.00 | 9,902.485 |
| 2026-06-23 | McCourt MaryFrances | Grant / award (derivative) | 2.517 | $0.00 | 2,615.517 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.