Mario Gabelli acquired 17k International Business Machines shares worth $4.5M. That's 0.04% of their equity portfolio (368th largest holding). The first International Business Machines trade was made in Q1 2001. Since then Mario Gabelli bought shares 40 more times and sold shares on 55 occasions. The stake costed the investor $1.78M, netting the investor a gain of 152% so far.