| Symbol | Relationship | Date | Transaction | Cost | # Shares | Value($) | Total Shares | Form 4 |
| NRP | Director | Feb 26, 2013 | Option Exercise | $22.32 | 3,375 | 75,330 | 10,000 | Feb 26, 2013, 05:02 PM |
| NRP | Director | Feb 28, 2012 | Option Exercise | $26.40 | 3,000 | 79,200 | 10,000 | Feb 29, 2012, 05:35 PM |
| COG | Director | Feb 18, 2011 | Option Exercise | $40.56 | 3,945 | 160,009 | 24,362 | Feb 22, 2011, 12:37 PM |
| NRP | Director | Feb 13, 2011 | Option Exercise | $35.44 | 3,000 | 106,320 | 10,000 | Feb 14, 2011, 07:05 PM |
| Symbol | Relationship | Date | Transaction | Value($) |
| NRP | Director | Feb 26, 2013 | Option Exercise | 75,330 |
| NRP | Director | Feb 28, 2012 | Option Exercise | 79,200 |
| COG | Director | Feb 18, 2011 | Option Exercise | 160,009 |
| NRP | Director | Feb 13, 2011 | Option Exercise | 106,320 |