Mario Gabelli's position in 3M is currently worth $778 Thousand. That's 0.01% of their equity portfolio (595th largest holding). The first 3M trade was made in Q3 2002. Since then Mario Gabelli bought shares 25 more times and sold shares on 39 occasions. The stake costed the investor $738 Thousand, netting the investor a gain of 5.5% so far.