Mario Gabelli acquired 119 Thousand Rockwell Automation shares worth $35.2 Million. That's 0.38% of their equity portfolio (60th 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 70 occasions. The stake costed the investor $4.69 Million, netting the investor a gain of 650% so far.