Mario Gabelli acquired 19.1 Thousand International Business Machines shares worth $4.76 Million. That's 0.05% of their equity portfolio (326th largest holding). The first International Business Machines trade was made in Q1 2001. Since then Mario Gabelli bought shares 39 more times and sold shares on 51 occasions. The stake costed the investor $2 Million, netting the investor a gain of 137% so far.