Guillaume Marie Jean Rutten is CEO & President at AMKOR TECHNOLOGY, INC. (AMKR). They have made 39 open-market trades across 1 company since 2015, most recently 2026-08-06.
CIK 0001596796
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 39 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| AMKR | 461,732 | $19.3M |
Shares reported on the most recent Form 4, priced at the 2026-08-07 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| AMKR | SELL | 2026-08-05 | 2026-08-07 | $54.93 | $2.7M | -8.9% | -9.2% | — |
| AMKR | SELL | 2026-05-08 | 2026-05-12 | $74.28 | $3.7M | -13.4% | +0.3% | -30.4% |
| AMKR | SELL | 2026-02-24 | 2026-02-26 | $48.80 | $976K | -6.3% | -12.1% | +53.8% |
| AMKR | SELL | 2026-02-17 | 2026-02-18 | $45.89 | $459K | +5.5% | +1.1% | +44.7% |
| AMKR | SELL | 2026-01-15 | 2026-01-20 | $53.14 | $531K | -2.7% | -2.7% | +39.7% |
| AMKR | SELL · 10b5-1 | 2025-12-15 | 2025-12-17 | $44.80 | $448K | -0.9% | +17.7% | +13.6% |
| AMKR | SELL · 10b5-1 | 2025-11-17 | 2025-11-19 | $31.68 | $317K | +21.4% | +20.6% | +39.9% |
| AMKR | SELL · 10b5-1 | 2025-10-15 | 2025-10-17 | $30.74 | $307K | +1.7% | -3.9% | +53.0% |
| AMKR | SELL · 10b5-1 | 2025-09-23 | 2025-09-23 | $30.00 | $300K | -0.0% | +8.8% | +38.8% |
| AMKR | SELL · 10b5-1 | 2024-10-15 | 2024-10-17 | $31.51 | $315K | -10.3% | -18.6% | -19.0% |
| AMKR | SELL · 10b5-1 | 2024-09-16 | 2024-09-18 | $30.00 | $544K | -1.8% | -2.0% | -14.5% |
| AMKR | SELL · 10b5-1 | 2024-08-15 | 2024-08-19 | $32.56 | $814K | -0.9% | -8.5% | -23.2% |
| AMKR | SELL · 10b5-1 | 2024-07-15 | 2024-07-17 | $42.94 | $1.1M | -9.9% | -22.0% | -28.2% |
| AMKR | SELL · 10b5-1 | 2024-06-17 | 2024-06-20 | $34.82 | $871K | +3.7% | +6.2% | -22.1% |
| AMKR | SELL · 10b5-1 | 2024-05-15 | 2024-05-17 | $33.37 | $1.7M | -0.4% | +11.9% | +0.3% |
| AMKR | SELL · 10b5-1 | 2024-04-16 | 2024-04-18 | $31.17 | $779K | +12.0% | +14.7% | +42.7% |
| AMKR | SELL · 10b5-1 | 2024-03-15 | 2024-03-19 | $31.23 | $781K | +2.8% | -6.3% | +18.6% |
| AMKR | SELL · 10b5-1 | 2024-02-22 | 2024-02-26 | $30.63 | $766K | +16.9% | +6.0% | +8.4% |
| AMKR | SELL | 2023-04-17 | 2023-04-19 | $23.92 | $718K | -3.2% | -1.3% | +28.9% |
| AMKR | SELL | 2023-03-15 | 2023-03-17 | $24.19 | $726K | +1.9% | -3.2% | +5.6% |
| AMKR | SELL | 2023-02-15 | 2023-02-17 | $26.97 | $809K | +0.8% | -3.4% | -11.3% |
| AMKR | SELL | 2023-01-17 | 2023-01-19 | $30.73 | $922K | -0.5% | -15.5% | -20.4% |
| AMKR | SELL | 2022-12-15 | 2022-12-16 | $25.68 | $770K | -4.7% | +21.6% | -0.3% |
| AMKR | SELL | 2022-11-15 | 2022-11-17 | $27.46 | $1.6M | -3.2% | -15.5% | -4.6% |
| AMKR | SELL | 2022-11-08 | 2022-11-10 | $22.00 | $1.3M | +14.2% | +8.7% | +24.0% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.