David Brent Shafer is CEO & Chairman at CERNER CORP /MO/ (CERN). They have made 6 open-market trades across 1 company since 2018, most recently 2026-06-11.
CIK 0001728374
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 6 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CERN | SELL | 2021-05-07 | 2021-05-07 | $76.36 | $13.6M | +0.1% | +1.5% | +2.0% |
| CERN | SELL | 2020-06-09 | 2020-06-11 | $72.42 | $869K | +5.2% | +2.8% | +5.9% |
| CERN | SELL | 2020-05-28 | 2020-05-29 | $71.30 | $6.4M | -0.8% | -6.2% | +1.1% |
| CERN | SELL | 2020-05-11 | 2020-05-13 | $68.52 | $2.0M | +4.7% | +4.0% | +12.5% |
| CERN | SELL | 2020-04-30 | 2020-05-01 | $69.73 | $1.7M | -2.1% | +9.5% | +7.4% |
| CERN | SELL | 2018-05-21 | 2018-05-22 | $61.36 | $1.6M | +0.8% | +1.1% | +10.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.