David L. Goodin is CEO & President at MDU RESOURCES GROUP INC (MDU). They have made 8 open-market trades across 1 company since 2009, most recently 2026-07-09.
CIK 0001428704
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 $757K since 2012, against 2 sales. Across 6 scored buys the stock is up 6.1% at ninety days, and 1.0 points ahead of the S&P over the same stretch.
6 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 50% | 100% | 100% |
| Avg Move | +0.2% | +3.2% | +6.1% |
| Alpha | +1.3% | +0.1% | +1.0% |
| Scored | 6 | 6 | 6 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MDU | BUY | 2020-05-12 | 2020-05-13 | $20.16 | $101K | +18.5% | +10.9% | +24.5% |
| MDU | BUY | 2019-05-30 | 2019-05-31 | $24.45 | $200K | +3.2% | +3.1% | +8.1% |
| MDU | BUY | 2017-08-11 | 2017-08-14 | $25.57 | $128K | +1.3% | +2.8% | +2.1% |
| MDU | BUY | 2015-02-17 | 2015-02-18 | $21.62 | $108K | -7.3% | +0.7% | +0.7% |
| MDU | BUY | 2013-06-20 | 2013-06-21 | $24.40 | $122K | -7.3% | +0.7% | +0.7% |
| MDU | BUY | 2012-11-16 | 2012-11-20 | $19.76 | $99K | -7.3% | +0.7% | +0.7% |
| MDU | SELL | 2010-11-15 | 2010-11-16 | $20.71 | $205K | -7.3% | +0.7% | +0.7% |
| MDU | SELL | 2009-11-13 | 2009-11-16 | $22.15 | $352K | -7.3% | +0.7% | +0.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.