Joel Greenblatt's position in MDU Resources Group is currently worth $4.43 Million. That's 0.08% of their equity portfolio (326th largest holding). The first MDU Resources Group trade was made in Q1 2016. Since then Joel Greenblatt bought shares eight more times and sold shares on eight occasions. The stake costed the investor $3.6 Million, netting the investor a gain of 23% so far.