Mario Gabelli's position in 3M is currently worth $1.72 Million. That's 0.02% of their equity portfolio (490th largest holding). The first 3M trade was made in Q3 2002. Since then Mario Gabelli bought shares 29 more times and sold shares on 40 occasions. The stake costed the investor $1.02 Million, netting the investor a gain of 69% so far.