Mario Gabelli acquired 21.5 Thousand International Business Machines shares worth $4.11 Million. That's 0.04% of their equity portfolio (355th largest holding). The first International Business Machines trade was made in Q1 2001. Since then Mario Gabelli bought shares 38 more times and sold shares on 48 occasions. The stake costed the investor $2.26 Million, netting the investor a gain of 82% so far.