Weili Dai is 10% Owner at MARVELL TECHNOLOGY GROUP LTD (MRVL). They have made 16 open-market trades across 1 company since 2016, most recently 2026-06-10.
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 16 sales. Too few scored purchases to measure a record yet.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 50% | 19% | 0% |
| Avg Move | +0.7% | +6.0% | +19.4% |
| Scored | 16 | 16 | 16 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MRVL | SELL | 2017-10-24 | 2017-10-25 | $18.56 | $224.9M | +9.7% | +29.3% | +27.8% |
| MRVL | SELL | 2017-10-20 | 2017-10-24 | $18.55 | $47.0M | +0.1% | +28.7% | +27.7% |
| MRVL | SELL | 2017-10-18 | 2017-10-20 | $18.48 | $17.5M | -2.2% | +15.5% | +26.7% |
| MRVL | SELL | 2017-10-11 | 2017-10-13 | $18.52 | $52.8M | +0.5% | +10.0% | +26.5% |
| MRVL | SELL | 2017-10-03 | 2017-10-04 | $18.50 | $7.8M | -1.3% | +0.0% | +19.9% |
| MRVL | SELL | 2017-10-02 | 2017-10-04 | $18.52 | $26.3M | -1.3% | +0.0% | +19.9% |
| MRVL | SELL | 2017-09-15 | 2017-09-19 | $18.51 | $15.8M | -1.6% | +1.2% | +21.8% |
| MRVL | SELL | 2017-09-13 | 2017-09-15 | $17.84 | $24.5M | -2.7% | -0.8% | +17.5% |
| MRVL | SELL | 2017-09-11 | 2017-09-13 | $17.44 | $26.8M | -0.5% | +3.3% | +25.4% |
| MRVL | SELL | 2017-09-05 | 2017-09-07 | $17.83 | $9.6M | +4.0% | +5.7% | +25.0% |
| MRVL | SELL | 2016-12-07 | 2016-12-09 | $14.13 | $3.9M | +0.8% | +0.7% | +10.9% |
| MRVL | SELL | 2016-12-07 | 2016-12-09 | $14.19 | $10.4M | +0.8% | +0.7% | +10.9% |
| MRVL | SELL | 2016-12-06 | 2016-12-08 | $14.11 | $14.9M | -0.4% | -0.2% | +10.0% |
| MRVL | SELL | 2016-12-05 | 2016-12-07 | $14.03 | $9.2M | -0.8% | -1.0% | +11.3% |
| MRVL | SELL | 2016-12-01 | 2016-12-05 | $14.45 | $1.4M | +3.1% | +1.4% | +14.0% |
| MRVL | SELL | 2016-11-29 | 2016-12-01 | $14.45 | $1.1M | +3.6% | +1.7% | +15.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.