Mario Gabelli acquired 472k Halliburton shares worth $16M. That's 0.14% of their equity portfolio (173rd largest holding). The first Halliburton trade was made in Q1 2001. Since then Mario Gabelli bought shares 32 more times and sold shares on 64 occasions. The stake costed the investor $12.7M, netting the investor a gain of 26% so far.