Mario Gabelli acquired 8.06 Thousand Pioneer Natural Resources shares worth $2.17 Million. That's 0.02% of their equity portfolio (466th largest holding). The first Pioneer Natural Resources trade was made in Q1 2003. Since then Mario Gabelli bought shares seventeen more times and sold shares on 41 occasions. The stake costed the investor $1.86 Million, netting the investor a gain of 17% so far.