Mason Hawkins - Longleaf Partners
Holding/activity history for Pioneer Natural Resources (PXD)
| Period | Shares | % of Portfolio | Activity | % Change to Portfolio | Reported Price |
| 2011 Q2 | 0 | 0 | Sell 100.00% | 3.31 | |
| 2011 Q1 | 2,694,000 | 3.31 | Reduce 51.84% | 3.56 | $101.92 |
| 2010 Q4 | 5,594,000 | 6.09 | Reduce 21.59% | 1.68 | $86.82 |
| 2010 Q3 | 7,133,900 | 6.24 | Reduce 17.60% | 1.33 | $65.03 |
| 2010 Q2 | 8,657,900 | 8.15 | $59.45 | ||
| 2010 Q1 | 8,657,900 | 6.95 | $56.32 | ||
| 2009 Q4 | 8,657,900 | 6.08 | $48.17 | ||
| 2009 Q3 | 8,657,900 | 4.61 | $36.29 | ||
| 2009 Q2 | 8,657,900 | 3.83 | $25.50 | ||
| 2009 Q1 | 8,657,900 | 2.76 | $16.47 | ||
| 2008 Q4 | 8,657,900 | 2.66 | $16.18 | ||
| 2008 Q3 | 8,657,900 | 5.23 | $52.28 | ||
| 2008 Q2 | 8,657,900 | 6.36 | $78.28 | ||
| 2008 Q1 | 8,657,900 | 4.23 | $49.12 | ||
| 2007 Q4 | 8,657,900 | 3.79 | Reduce 1.44% | 0.06 | $48.84 |
| 2007 Q3 | 8,784,400 | 3.36 | $44.98 | ||
| 2007 Q2 | 8,784,400 | 3.74 | $48.71 | ||
| 2007 Q1 | 8,784,400 | 3.64 | $43.11 | ||
| 2006 Q4 | 8,784,400 | 3.53 | $39.69 |