| Mayer Edwin S. Jr. D #1442-435-36669 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,022 | Feb 2, 2004 | — | — |
| Simmons Ranch #5442-435-36670 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,357 | Feb 2, 2004 | — | — |
| Vanderstucken 69 #5A42-435-36665 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,157 | Jan 29, 2004 | — | — |
| Vanderstucken 69 #6A42-435-36666 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,183 | Jan 29, 2004 | — | — |
| Mayer 48 #242-435-36667 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,100 | Jan 29, 2004 | — | — |
| Mayfield 34 #1142-435-36663 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,525 | Jan 26, 2004 | — | — |
| Richardson 135 #842-435-36664 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 8,371 | Jan 26, 2004 | — | — |
| Mayfield 41 #8HHZ42-435-36660 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,575 | Jan 23, 2004 | — | — |
| Mayfield 40 #642-435-36661 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,500 | Jan 23, 2004 | — | — |
| Cauthorn Mack 129 #1142-435-36662 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 7,301 | Jan 23, 2004 | — | — |
| Meckel #7642-435-36655 | Upp Operating LLC only | Sutton, TXSonora (Canyon Upper) | ActiveGas | 5,923 | Jan 22, 2004 | — | — |
| Martin #3042-435-36656 | Upp Operating LLC only | Sutton, TXSonora (Canyon Upper) | Temporarily abandonedGas | 6,017 | Jan 22, 2004 | — | — |
| Richardson 139 #642-435-36657 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,350 | Jan 22, 2004 | — | — |
| Simmons Ranch #4942-435-36658 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,390 | Jan 22, 2004 | — | — |
| Hill-Vanderstucken a #342-435-36659 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,600 | Jan 22, 2004 | — | — |
| Genini #331142-435-36644 | Robert C. Brower LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,900 | Jan 20, 2004 | — | — |
| Genini #331242-435-36645 | Robert C. Brower LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,900 | Jan 20, 2004 | — | — |
| Genini #380942-435-36646 | Robert C. Brower LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,400 | Jan 20, 2004 | — | — |
| Carta 114 #842-435-36647 | Robert C. Brower LLC only | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,400 | Jan 20, 2004 | — | — |
| Galbreath, M.S. #342-435-36648 | KCS Resources, Inc.permitted by · no operator of record | Sutton, TXSawyer (Canyon) | Not on schedule | 6,400 | Jan 20, 2004 | — | — |
| Mayer Edwin S.jr. U #642-435-36649 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,108 | Jan 20, 2004 | — | — |
| Cusenbary 58 #542-435-36650 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,000 | Jan 20, 2004 | — | — |
| Mayfield 33 #1042-435-36651 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,549 | Jan 20, 2004 | — | — |
| Hill-Mayer Edwin S Jr. DD #242-435-36652 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,019 | Jan 20, 2004 | — | — |
| Hill-Mayer Edwin S Jr. DD #342-435-36653 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,025 | Jan 20, 2004 | — | — |
| Mayer Ranch Q-15 #242-435-36654 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,850 | Jan 20, 2004 | — | — |
| Cusenbary 59 #242-435-36642 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 5,800 | Jan 16, 2004 | — | — |
| Vanderstucken J. M. #1242-435-36643 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,810 | Jan 16, 2004 | — | — |
| Mayer 49 #442-435-36639 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,141 | Jan 15, 2004 | — | — |
| Mayer #60642-435-36636 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,374 | Jan 13, 2004 | — | — |
| Steen #7442-435-36637 | Upp Operating LLC only | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,107 | Jan 13, 2004 | — | — |
| Steen #7542-435-36638 | Upp Operating LLC only | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,201 | Jan 13, 2004 | — | — |
| Cauthorn 27 #942-435-36628 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,700 | Jan 12, 2004 | — | — |
| Cauthorn 27 #842-435-36629 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,826 | Jan 12, 2004 | — | — |
| Mayfield 32 #742-435-36630 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,650 | Jan 12, 2004 | — | — |
| Reinhardt 6 #942-435-36631 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,350 | Jan 12, 2004 | — | — |
| Reinhardt 6 #1042-435-36632 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,322 | Jan 12, 2004 | — | — |
| Simmons Ranch #6542-435-36633 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,250 | Jan 12, 2004 | — | — |
| Simmons Ranch #6742-435-36634 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,200 | Jan 12, 2004 | — | — |
| Thomson B #142-435-36635 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 6,124 | Jan 12, 2004 | — | — |
| Vanderstucken J. M. #1042-435-36627 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,600 | Jan 9, 2004 | — | — |
| Valliant #642-435-36625 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,676 | Jan 8, 2004 | — | — |
| Mayfield 40 #1142-435-36626 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,324 | Jan 8, 2004 | — | — |
| Meckel #7742-435-36622 | Upp Operating LLC only | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,233 | Jan 6, 2004 | — | — |
| Mayer #60842-435-36623 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,408 | Jan 6, 2004 | — | — |
| Mayer Edwin S. Jr. D #50242-435-36624 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,100 | Jan 6, 2004 | — | — |
| Hill Wess #1342-435-36621 | Henry Petroleum LLC only | Sutton, TXWhitehead (Strawn) | ActiveGas | 8,797 | Jan 5, 2004 | — | — |
| Mayer Edwin S. Jr. D #60242-435-36617 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 8,050 | Dec 30, 2003 | — | — |
| Simmons 73 #642-435-36618 | Upp Operating LLC only | Sutton, TXSawyer (Canyon) | ActiveGas | 7,905 | Dec 29, 2003 | — | — |
| Simmons 71 #642-435-36619 | Upp Operating LLC only | Sutton, TXSawyer (Strawn North) | ActiveGas | 7,914 | Dec 29, 2003 | — | — |