Mario Gabelli acquired 118 Thousand Rockwell Automation shares worth $39.2 Million. That's 0.40% of their equity portfolio (61st largest holding). The first Rockwell Automation trade was made in Q1 2001. Since then Mario Gabelli bought shares eighteen more times and sold shares on 71 occasions. The stake costed the investor $4.63 Million, netting the investor a gain of 746% so far.