Mario Gabelli acquired 20.7 Thousand International Business Machines shares worth $3.5 Million. That's 0.04% of their equity portfolio (381st 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 49 occasions. The stake costed the investor $2.17 Million, netting the investor a gain of 61% so far.