Mark J. Erceg is CFO & VP at CERNER Corp (CERN). They have made 8 open-market trades across 3 companies since 2013, most recently 2026-02-27.
CIK 0001580700
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.
6 open-market purchases totalling $9.1M since 2021, against 2 sales. Across 6 scored buys the stock is down 5.3% at ninety days, and 13.3 points behind the S&P over the same stretch.
6 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 17% | 50% | 67% |
| Avg Move | -3.9% | -4.7% | -5.3% |
| Alpha | -4.5% | -8.0% | -13.3% |
| Scored | 6 | 6 | 6 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| NWL | BUY | 2023-05-03 | 2023-05-05 | $9.98 | $2.0M | -11.5% | -15.0% | +6.1% |
| NWL | BUY | 2023-03-09 | 2023-03-13 | $12.85 | $1.6M | -5.9% | -0.2% | -30.9% |
| NWL | BUY | 2023-02-17 | 2023-02-22 | $14.99 | $1000K | -8.0% | -20.7% | -38.5% |
| CERN | BUY | 2021-03-08 | 2021-03-10 | $71.13 | $1.5M | -0.1% | +1.1% | +10.4% |
| CERN | BUY | 2021-03-01 | 2021-03-03 | $69.66 | $1.5M | +2.9% | +4.2% | +10.8% |
| CERN | BUY | 2021-02-22 | 2021-02-24 | $70.43 | $1.5M | -0.9% | +2.3% | +10.4% |
| TIF | SELL | 2020-11-25 | 2020-11-30 | $131.61 | $28.1M | -0.0% | +0.1% | N/A |
| TIF | SELL | 2019-12-30 | 2020-01-02 | $133.57 | $46.3M | +0.4% | +0.5% | -3.2% |
| DOOR | SELL · 10b5-1 | 2014-06-13 | 2014-06-17 | $55.00 | $550K | -6.8% | -0.9% | -0.9% |
| DOOR | SELL · 10b5-1 | 2013-12-18 | 2013-12-20 | $52.50 | $635K | -6.8% | -0.9% | -0.9% |
| DOOR | SELL · 10b5-1 | 2013-10-03 | 2013-10-04 | $47.08 | $3.5M | -6.8% | -0.9% | -0.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.