| 2008-11-07 | MDU Resources Group, Inc. MDU | director | 10,000 0.0053% | $18.05 | $180,520 | +6.57% | ||
| 2007-02-21 | MDU Resources Group, Inc. MDU | director | 4,000 0.0022% | $26.79 | $107,148 | +5.12% | ||
| 2006-05-01 | MDU Resources Group, Inc. MDU | director | 2,000 0.0017% | $36.89 | $73,780 | +4.9% | ||
| 2006-02-22 | MDU Resources Group, Inc. MDU | director | 2,000 0.0017% | $35.70 | $71,391 | +3.14% | ||
| 2005-11-29 | MDU Resources Group, Inc. MDU | director | 6,000 0.0051% | $33.78 | $202,705 | +7.7% | ||
| 2004-02-18 | MDU Resources Group, Inc. MDU | director | 5,200 0.0045% | $23.95 | $124,540 | +5.88% | ||
| 2004-02-17 | MDU Resources Group, Inc. MDU | director | 800 0.0007% | $23.94 | $19,150 | +5.38% |