Mario Gabelli acquired 124 Thousand Rockwell Automation shares worth $33.3 Million. That's 0.36% of their equity portfolio (69th largest holding). The first Rockwell Automation trade was made in Q1 2001. Since then Mario Gabelli bought shares seventeen more times and sold shares on 67 occasions. The stake costed the investor $4.85 Million, netting the investor a gain of 588% so far.