| Aldwell Winnie R. Trust K #642-435-36879 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,604 | May 19, 2004 | — | — |
| Aldwell Winnie R. Trust #1542-435-36880 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,600 | May 19, 2004 | — | — |
| Aldwell Winnie R. Trust #1842-435-36881 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,607 | May 19, 2004 | — | — |
| Simmons Ranch #8242-435-36882 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,068 | May 19, 2004 | — | — |
| Simmons Ranch #9942-435-36883 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 8,036 | May 19, 2004 | — | — |
| Shurley 141 #1742-435-36772 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,900 | May 17, 2004 | — | — |
| Shurley 141 #1642-435-36773 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,969 | May 17, 2004 | — | — |
| Mayfield 45 #1742-435-36129 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,616 | May 7, 2004 | — | — |
| Morris 64 #742-435-36873 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,100 | May 7, 2004 | — | — |
| Morris 64 #842-435-36874 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,000 | May 7, 2004 | — | — |
| Deberry Meckel Unit #1542-435-36875 | Upp Operating LLC only | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,419 | May 7, 2004 | — | — |
| Shurley #10942-435-36876 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,229 | May 7, 2004 | — | — |
| Shurley #10842-435-36878 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,201 | May 7, 2004 | — | — |
| Hill Wess #442-435-31411 | Henry Petroleum LLC only | Sutton, TXWhitehead (Strawn) | ActiveGas | 8,970 | May 5, 2004 | — | — |
| Hill Wess #1442-435-36842 | Henry Petroleum LLC only | Sutton, TXWhitehead (Strawn) | ActiveGas | 8,900 | May 5, 2004 | — | — |
| Hill-Mayer Edwin S. Jr. X #542-435-36869 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 7,910 | May 4, 2004 | — | — |
| Mayer Edwin S. Jr. T #342-435-36870 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 7,998 | May 4, 2004 | — | — |
| Hill-Mayer Edwin S. Jr. D #442-435-36871 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,098 | May 4, 2004 | — | — |
| Hill-Mayer Edwin S. Jr. B #542-435-36872 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,075 | May 4, 2004 | — | — |
| Fawcett Bobbie H. #1342-435-36858 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,455 | May 3, 2004 | — | — |
| Fawcett Bobbie H. #1442-435-36859 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 8,600 | May 3, 2004 | — | — |
| Cusenbary 60 #1642-435-36860 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 5,728 | May 3, 2004 | — | — |
| Cusenbary 60 #1442-435-36861 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 5,715 | May 3, 2004 | — | — |
| Cusenbary 60 #842-435-36862 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 5,814 | May 3, 2004 | — | — |
| Wilson Duke 171 #1342-435-36864 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 7,801 | May 3, 2004 | — | — |
| Galbreath 65 #1242-435-36865 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,150 | May 3, 2004 | — | — |
| Galbreath 65 #1042-435-36866 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,165 | May 3, 2004 | — | — |
| Fawcett Bobby H. #1142-435-36867 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,413 | May 3, 2004 | — | — |
| Fawcett Bobby H. #1242-435-36868 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,500 | May 3, 2004 | — | — |
| Morriss 64 #1342-435-36853 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,101 | Apr 30, 2004 | — | — |
| Morriss 64 #642-435-36854 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,011 | Apr 30, 2004 | — | — |
| Wilson Duke 172 #1242-435-36855 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,850 | Apr 30, 2004 | — | — |
| Wilson Duke 172 #1542-435-36856 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,800 | Apr 30, 2004 | — | — |
| Wilson Duke 189 #1342-435-36857 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,800 | Apr 30, 2004 | — | — |
| Miers W. A. #1742-435-36844 | Henry Petroleum LLC only | Sutton, TXMiers (Stray) | ActiveGas | 4,500 | Apr 29, 2004 | — | — |
| Mayer 7 #342-435-36846 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,511 | Apr 29, 2004 | — | — |
| Mayer Ranch J #90242-435-36847 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,128 | Apr 29, 2004 | — | — |
| Glasscock Lillian Bell #311342-435-36848 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,518 | Apr 29, 2004 | — | — |
| Glasscock Lillian Bell #320842-435-36849 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,619 | Apr 29, 2004 | — | — |
| Glasscock Lillian Bell #321242-435-36850 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,550 | Apr 29, 2004 | — | — |
| Glasscock Lillian Bell #321142-435-36851 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,615 | Apr 29, 2004 | — | — |
| Glasscock L. B. #290642-435-36852 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,530 | Apr 29, 2004 | — | — |
| Mittel Ben #542-435-36845 | Enervest Operating L.L.C. only | Sutton, TXSonora (Canyon Upper) | PluggedGas | 6,700 | Apr 28, 2004 | — | — |
| Nicks Gerald #742-435-36673 | R2Q Operating LLC only | Sutton, TXDenison (Strawn) | ActiveGas | 9,025 | Apr 26, 2004 | — | — |
| Thomson B #242-435-36838 | Upp Operating LLC only | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,200 | Apr 26, 2004 | — | — |
| Randee Fawcett Trust C #1042-435-36840 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,649 | Apr 26, 2004 | — | — |
| Deberry a #8542-435-36841 | Upp Operating LLC only | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,624 | Apr 26, 2004 | — | — |
| Phillips #220142-435-36829 | Great Western Drilling Companypermitted by · no operator of record | Sutton, TXAldwell Ranch (Canyon) | Plugged | 10,500 | Apr 23, 2004 | — | — |
| Steen #7742-435-36830 | Upp Operating LLC only | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,262 | Apr 23, 2004 | — | — |
| Steen #8042-435-36831 | Upp Operating LLC only | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,106 | Apr 23, 2004 | — | — |