| 659147 | Apr 23, 2008 | Apr 23, 2008 | Devon Energy Production Co, L.P. | Carlock, Allen #1HH | 9,000 | 25132841 |
| 659105 | Apr 23, 2008 | Apr 23, 2008 | Chesapeake Operating, Inc. | Brown #3HH | 9,000 | 25132840 |
| 659103 | Apr 23, 2008 | Apr 23, 2008 | Chesapeake Operating, Inc. | Brown #2HH | 9,000 | 25132839 |
| 659103Amendment | Apr 23, 2008 | Apr 23, 2008 | Chesapeake Operating, Inc. | Brown #2HH | 9,000 | 25132839 |
| 659057 | Apr 23, 2008 | Apr 23, 2008 | Devon Energy Production Co, L.P. | West & West #3HH | 9,000 | 25132837 |
| 659055 | Apr 23, 2008 | Apr 23, 2008 | Devon Energy Production Co, L.P. | West & West #2HH | 9,000 | 25132855 |
| 659036 | Apr 23, 2008 | Apr 23, 2008 | Devon Energy Production Co, L.P. | Korb, William #2HH | 9,000 | 25132835 |
| 658881 | Apr 23, 2008 | Apr 23, 2008 | Chesapeake Operating, Inc. | Tantarra Estate #3HH | 9,000 | 25132836 |
| 658135Amendment | Apr 23, 2008 | Apr 23, 2008 | Arrington,david H. Oil & Gas,inc | Lefty Riesling #2HH | 6,500 | 25132784 |
| 658131Amendment | Apr 23, 2008 | Apr 23, 2008 | Arrington,david H. Oil & Gas,inc | Lefty Riesling #1HH | 6,500 | 25132789 |
| 659030 | Apr 22, 2008 | Apr 22, 2008 | Devon Energy Production Co, L.P. | Korb, William #1HH | 9,000 | 25132834 |
| 658986 | Apr 22, 2008 | Apr 22, 2008 | Chesapeake Operating, Inc. | Mize Family #44HH | 9,000 | 25132833 |
| 658985 | Apr 22, 2008 | Apr 22, 2008 | Chesapeake Operating, Inc. | Mize Family #39HH | 9,000 | 25132832 |
| 658859 | Apr 21, 2008 | Apr 21, 2008 | EOG Resources, Inc. | Dodson Unit #5HH | 10,000 | 25132827 |
| 658859Amendment | Apr 21, 2008 | Apr 21, 2008 | EOG Resources, Inc. | Dodson Unit #5HH | 10,000 | 25132827 |
| 658819 | Apr 21, 2008 | Apr 21, 2008 | Devon Energy Production Co, L.P. | Whitehorn, John #1HH | 9,000 | 25132822 |
| 658819Amendment | Apr 21, 2008 | Apr 21, 2008 | Devon Energy Production Co, L.P. | Whitehorn, John #1HH | 9,000 | 25132822 |
| 658848 | Apr 18, 2008 | Apr 18, 2008 | EOG Resources, Inc. | Dodson Unit #4HH | 10,000 | 25132825 |
| 658848Amendment | Apr 18, 2008 | Apr 18, 2008 | EOG Resources, Inc. | Dodson Unit #4HH | 10,000 | 25132825 |
| 658844 | Apr 18, 2008 | Apr 18, 2008 | EOG Resources, Inc. | Dodson Unit #3HH | 10,000 | 25132824 |
| 658844Amendment | Apr 18, 2008 | Apr 18, 2008 | EOG Resources, Inc. | Dodson Unit #3HH | 10,000 | 25132824 |
| 658843 | Apr 18, 2008 | Apr 18, 2008 | EOG Resources, Inc. | Dodson Unit #2HH | 10,000 | 25132826 |
| 658843Amendment | Apr 18, 2008 | Apr 18, 2008 | EOG Resources, Inc. | Dodson Unit #2HH | 10,000 | 25132826 |
| 658828 | Apr 18, 2008 | Apr 18, 2008 | Chesapeake Operating, Inc. | Graves #6HH | 9,000 | 25132823 |
| 658815 | Apr 18, 2008 | Apr 18, 2008 | EOG Resources, Inc. | Kemp a Unit #6HH | 10,000 | 25132815 |
| 658799 | Apr 18, 2008 | Apr 18, 2008 | Chesapeake Operating, Inc. | Culton, Elvis #2HH | 9,000 | 25132813 |
| 658801 | Apr 17, 2008 | Apr 17, 2008 | XTO Energy Inc. | Holybee Unit #A 2HH | 12,000 | 25132814 |
| 658800 | Apr 17, 2008 | Apr 17, 2008 | Chesapeake Operating, Inc. | Elvis Culton #3HH | 9,000 | 25132812 |
| 658675 | Apr 17, 2008 | Apr 17, 2008 | Devon Energy Production Co, L.P. | Carter, Jennie Vee #1HH | 9,000 | 25132817 |
| 652483Amendment | Apr 17, 2008 | Apr 17, 2008 | Sullivan, Hollis R. Inc. | Rice #1HH | 8,900 | 25132516 |
| 658764 | Apr 15, 2008 | Apr 15, 2008 | XTO Energy Inc. | Weatherby Unit #5HH | 11,000 | 25132810 |
| 658764Amendment | Apr 15, 2008 | Apr 15, 2008 | XTO Energy Inc. | Weatherby Unit #5HH | 11,000 | 25132810 |
| 658755 | Apr 15, 2008 | Apr 15, 2008 | XTO Energy Inc. | Weatherby Unit #2HH | 11,000 | 25132811 |
| 658755Amendment | Apr 15, 2008 | Apr 15, 2008 | XTO Energy Inc. | Weatherby Unit #2HH | 11,000 | 25132811 |
| 658745 | Apr 15, 2008 | Apr 15, 2008 | Sullivan, Hollis R. Inc. | Sharon Damron #1HH | 8,900 | 25132809 |
| 658745Amendment | Apr 15, 2008 | Apr 15, 2008 | XTO Energy Inc. | Sharon Damron Unit #1HH | 9,800 | 25132809 |
| 658669 | Apr 14, 2008 | Apr 14, 2008 | Chesapeake Operating, Inc. | Hyder #9HH | 9,000 | 25132808 |
| 658653 | Apr 14, 2008 | Apr 14, 2008 | Quicksilver Resources Inc. | Ralph Wiggum #12HH | 9,000 | 25132807 |
| 658651 | Apr 14, 2008 | Apr 14, 2008 | Quicksilver Resources Inc. | Ralph Wiggum #11HH | 9,000 | 25132806 |
| 658529 | Apr 14, 2008 | Apr 14, 2008 | Chesapeake Operating, Inc. | Hyder #8HH | 9,000 | 25132804 |
| 658480 | Apr 14, 2008 | Apr 14, 2008 | Chesapeake Operating, Inc. | Lakeview #3HH | 9,000 | 25132802 |
| 658480Amendment | Apr 14, 2008 | Apr 14, 2008 | Chesapeake Operating, Inc. | Lakeview #3HH | 9,000 | 25132802 |
| 658397 | Apr 14, 2008 | Apr 14, 2008 | Chesapeake Operating, Inc. | Mize Family #21HH | 9,000 | 25132831 |
| 658147 | Apr 14, 2008 | Apr 14, 2008 | EOG Resources, Inc. | Kemp B Unit #8HH | 10,000 | 25132786 |
| 658609 | Apr 12, 2008 | Apr 12, 2008 | Devon Energy Production Co, L.P. | Abshire, William #1HH | 9,000 | 25132805 |
| 658609Amendment | Apr 12, 2008 | Apr 12, 2008 | Devon Energy Production Co, L.P. | Abshire, William #1HH | 9,000 | 25132805 |
| 658399 | Apr 11, 2008 | Apr 11, 2008 | Chesapeake Operating, Inc. | Mize Family #42HH | 9,000 | 25132801 |
| 658398 | Apr 11, 2008 | Apr 11, 2008 | Chesapeake Operating, Inc. | Mize Family #26HH | 9,000 | 25132800 |
| 658383 | Apr 11, 2008 | Apr 11, 2008 | Devon Energy Production Co, L.P. | Randy Hightower #1HH | 9,000 | 25132799 |
| 658331 | Apr 11, 2008 | Apr 11, 2008 | Devon Energy Production Co, L.P. | McNeely #1HH | 9,000 | 25132798 |
| 658229 | Apr 11, 2008 | Apr 11, 2008 | Chesapeake Operating, Inc. | Featherston #3HH | 9,000 | 25132793 |
| 650532 | Apr 11, 2008 | Apr 11, 2008 | Chesapeake Operating, Inc. | Cates #2HH | 9,000 | 25132409 |
| 658340 | Apr 10, 2008 | Apr 10, 2008 | Devon Energy Production Co, L.P. | McNeely #3HH | 9,000 | 25132796 |
| 658333 | Apr 10, 2008 | Apr 10, 2008 | Devon Energy Production Co, L.P. | McNeely #2HH | 9,000 | 25132795 |
| 658285 | Apr 10, 2008 | Apr 10, 2008 | EOG Resources, Inc. | Brown-Johnston Unit #2HH | 10,000 | 25132794 |
| 658228 | Apr 10, 2008 | Apr 10, 2008 | Chesapeake Operating, Inc. | Featherston #2HH | 9,000 | 25132792 |
| 650547Amendment | Apr 10, 2008 | Apr 10, 2008 | XTO Energy Inc. | Shaded Lane Unit #1HH | 12,000 | 25132412 |
| 650547Amendment | Apr 10, 2008 | Apr 10, 2008 | XTO Energy Inc. | Shaded Lane Unit #1HH | 12,000 | 25132412 |
| 658185 | Apr 9, 2008 | Apr 9, 2008 | EOG Resources, Inc. | Thelma Louise Unit #6HH | 10,000 | 25132790 |
| 658169 | Apr 9, 2008 | Apr 9, 2008 | EOG Resources, Inc. | Thelma Louise Unit #5HH | 10,000 | 25132788 |
| 658169Amendment | Apr 9, 2008 | Apr 9, 2008 | EOG Resources, Inc. | Thelma Louise Unit #5HH | 10,000 | 25132788 |
| 658164 | Apr 9, 2008 | Apr 9, 2008 | EOG Resources, Inc. | Thelma Louise Unit #4HH | 10,000 | 25132787 |
| 658164Amendment | Apr 9, 2008 | Apr 9, 2008 | EOG Resources, Inc. | Thelma Louise Unit #4HH | 10,000 | 25132787 |
| 658141 | Apr 9, 2008 | Apr 9, 2008 | EOG Resources, Inc. | Kemp B Unit #7HH | 10,000 | 25132785 |
| 658135 | Apr 9, 2008 | Apr 9, 2008 | Arrington,david H. Oil & Gas,inc | Lefty Riesling #2HH | 5,500 | 25132784 |
| 658131 | Apr 9, 2008 | Apr 9, 2008 | Arrington,david H. Oil & Gas,inc | Lefty Riesling #1HH | 5,500 | 25132789 |
| 656473 | Apr 9, 2008 | Apr 9, 2008 | Chesapeake Operating, Inc. | Holly #2HH | 9,000 | 25132705 |
| 658190 | Apr 8, 2008 | Apr 8, 2008 | Arrington,david H. Oil & Gas,inc | Kate #3HH | 7,200 | 25132791 |
| 658014 | Apr 8, 2008 | Apr 8, 2008 | Chesapeake Operating, Inc. | Otra Baca #3HH | 9,000 | 25132783 |
| 657889 | Apr 8, 2008 | Apr 8, 2008 | XTO Energy Inc. | County Line HI DY HO #6HH | 12,000 | 25132771 |
| 657889Amendment | Apr 8, 2008 | Apr 8, 2008 | XTO Energy Inc. | County Line HI DY HO #6HH | 12,000 | 25132771 |
| 657795 | Apr 8, 2008 | Apr 8, 2008 | Chesapeake Operating, Inc. | Lonestar #3HH | 9,000 | 25132762 |
| 658361 | Apr 7, 2008 | Apr 7, 2008 | Devon Energy Production Co, L.P. | Richard Scott` #1H | 9,000 | 25132797 |
| 658054 | Apr 7, 2008 | Apr 7, 2008 | EOG Resources, Inc. | Storm Unit #4HH | 10,000 | 25132782 |
| 658054Amendment | Apr 7, 2008 | Apr 7, 2008 | EOG Resources, Inc. | Storm Unit #4HH | 10,000 | 25132782 |
| 658043 | Apr 7, 2008 | Apr 7, 2008 | XTO Energy Inc. | Holybee Unit #B 2HH | 12,000 | 25132781 |
| 658043Amendment | Apr 7, 2008 | Apr 7, 2008 | XTO Energy Inc. | Holybee Unit #B 2HH | 12,000 | 25132781 |
| 658043Amendment | Apr 7, 2008 | Apr 7, 2008 | XTO Energy Inc. | Holybee Unit #B 2HH | 12,000 | 25132781 |
| 658042 | Apr 7, 2008 | Apr 7, 2008 | EOG Resources, Inc. | Storm Unit #3HH | 10,000 | 25132780 |
| 658041 | Apr 7, 2008 | Apr 7, 2008 | EOG Resources, Inc. | Storm Unit #2HH | 10,000 | 25132779 |
| 658026 | Apr 7, 2008 | Apr 7, 2008 | XTO Energy Inc. | Holybee Unit #B 1HH | 12,000 | 25132778 |
| 658026Amendment | Apr 7, 2008 | Apr 7, 2008 | XTO Energy Inc. | Holybee Unit #B 1HH | 12,000 | 25132778 |
| 658026Amendment | Apr 7, 2008 | Apr 7, 2008 | XTO Energy Inc. | Holybee Unit #B 1HH | 12,000 | 25132778 |
| 657966 | Apr 7, 2008 | Apr 7, 2008 | Devon Energy Production Co, L.P. | McClure #3HH | 9,000 | 25132776 |
| 657963 | Apr 7, 2008 | Apr 7, 2008 | Devon Energy Production Co, L.P. | McClure #2HH | 9,000 | 25132775 |
| 657979 | Apr 4, 2008 | Apr 4, 2008 | Devon Energy Production Co, L.P. | Hill Top Ranch #5HH | 9,000 | 25132777 |
| 657979Amendment | Apr 4, 2008 | Apr 4, 2008 | Devon Energy Production Co, L.P. | Hill Top Ranch #5H | 9,000 | 25132777 |
| 657944 | Apr 4, 2008 | Apr 4, 2008 | Devon Energy Production Co, L.P. | Manis #1HH | 9,000 | 25132774 |
| 657907 | Apr 4, 2008 | Apr 4, 2008 | XTO Energy Inc. | Weatherby Unit #3HH | 12,000 | 25132772 |
| 657907Amendment | Apr 4, 2008 | Apr 4, 2008 | XTO Energy Inc. | Weatherby Unit #3HH | 12,000 | 25132772 |
| 657888 | Apr 4, 2008 | Apr 4, 2008 | Chesapeake Operating, Inc. | Luck Lease #2HH | 9,000 | 25132770 |
| 657886 | Apr 4, 2008 | Apr 4, 2008 | Chesapeake Operating, Inc. | Luck Lease #1HH | 9,000 | 25132769 |
| 657798 | Apr 3, 2008 | Apr 3, 2008 | Chesapeake Operating, Inc. | Lonestar #4HH | 9,000 | 25132763 |
| 657791 | Apr 3, 2008 | Apr 3, 2008 | Chesapeake Operating, Inc. | Lonestar #2HH | 9,000 | 25132773 |
| 657788 | Apr 3, 2008 | Apr 3, 2008 | Chesapeake Operating, Inc. | Lonestar #1HH | 9,000 | 25132761 |
| 657808 | Apr 2, 2008 | Apr 2, 2008 | XTO Energy Inc. | Shaded Lane Unit #3HH | 12,000 | 25132765 |
| 657807 | Apr 2, 2008 | Apr 2, 2008 | XTO Energy Inc. | Shaded Lane Unit #2HH | 12,000 | 25132764 |
| 657803 | Apr 2, 2008 | Apr 2, 2008 | EOG Resources, Inc. | Lett Unit #1H | 10,000 | 25132766 |
| 657803Amendment | Apr 2, 2008 | Apr 2, 2008 | EOG Resources, Inc. | Lett Unit #1HH | 10,000 | 25132766 |
| 657719 | Apr 2, 2008 | Apr 2, 2008 | XTO Energy Inc. | RFS Unit #3HH | 11,000 | 25132767 |