Mario Gabelli's position in 3M is currently worth $1.74 Million. That's 0.02% of their equity portfolio (479th largest holding). The first 3M trade was made in Q3 2002. Since then Mario Gabelli bought shares 29 more times and sold shares on 39 occasions. The stake costed the investor $1.08 Million, netting the investor a gain of 61% so far.