Joel Greenblatt's position in Rockwell Automation is currently worth $6.71 Million. That's 0.12% of their equity portfolio (206th largest holding). The first Rockwell Automation trade was made in Q3 2011. Since then Joel Greenblatt bought shares 26 more times and sold shares on twenty occasions. The stake costed the investor $6.46 Million, netting the investor a gain of 3.9% so far.