Mario Gabelli acquired 8.62 Thousand Pioneer Natural Resources shares worth $2.34 Million. That's 0.02% of their equity portfolio (448th 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 40 occasions. The stake costed the investor $1.99 Million, netting the investor a gain of 17% so far.