| Clayton 7 #342-105-40342 | Upp Operating LLC | Crockett, TXOzona NE. (Canyon 7520) | ActiveGas | 8,750 | Jun 21, 2007 | — | — |
| Clayton 2 #642-105-40343 | Upp Operating LLC | Crockett, TXOzona NE. (Canyon 7520) | ActiveGas | 8,775 | Jun 21, 2007 | — | — |
| University 57-23 #242-413-32464 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 8,325 | Jun 21, 2007 | — | — |
| University 54-24 #342-413-32465 | Upp Operating LLC | Schleicher, TXOzona NE. (Canyon 7520) | ActiveGas | 8,400 | Jun 21, 2007 | — | — |
| Mayer 20A #1042-435-38486 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,812 | Jun 21, 2007 | — | — |
| Mayer 20A #1242-435-38487 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,811 | Jun 21, 2007 | — | — |
| Mayer 20A #1342-435-38488 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,824 | Jun 21, 2007 | — | — |
| Mayer 20A #1442-435-38489 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,828 | Jun 21, 2007 | — | — |
| Mayer 20A #1542-435-38490 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,800 | Jun 21, 2007 | — | — |
| Mayer 20A #1642-435-38491 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,848 | Jun 21, 2007 | — | — |
| Jones Ranch #155442-435-38576 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 7,500 | Jun 21, 2007 | — | — |
| Jones Ranch #155642-435-38577 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 7,508 | Jun 21, 2007 | — | — |
| Jones Ranch #156542-435-38578 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 7,510 | Jun 21, 2007 | — | — |
| Jones Ranch #155542-435-38579 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 7,511 | Jun 21, 2007 | — | — |
| Mittel #127342-435-38580 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 7,113 | Jun 21, 2007 | — | — |
| Mayer 20 #842-435-38432 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,725 | Jun 20, 2007 | — | — |
| Mayer 20 #742-435-38433 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,725 | Jun 20, 2007 | — | — |
| Morriss Brothers E #30442-435-38529 | Upp Operating LLC | Sutton, TXWhitehead (Strawn) | ActiveGas | 9,400 | Jun 20, 2007 | — | — |
| Wilson Duke 40 #2042-435-38554 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 9,100 | Jun 20, 2007 | — | — |
| Hill-Mayer ZZ #542-435-38568 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,100 | Jun 19, 2007 | — | — |
| Mayer Edwin S. Jr. D 8 #1242-435-38569 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,319 | Jun 19, 2007 | — | — |
| Mayer Edwin S. Jr. D 8 #1142-435-38570 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,350 | Jun 19, 2007 | — | — |
| Hill-Mayer Edwin S. Jr. CC #642-435-38571 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,181 | Jun 19, 2007 | — | — |
| Lancaster 155 #442-435-38560 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 7,500 | Jun 18, 2007 | — | — |
| Lancaster 155 #642-435-38561 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,512 | Jun 18, 2007 | — | — |
| Lancaster 155 #542-435-38562 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 7,510 | Jun 18, 2007 | — | — |
| Lancaster 155 #142-435-38563 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 7,495 | Jun 18, 2007 | — | — |
| Lancaster 155 #342-435-38564 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,510 | Jun 18, 2007 | — | — |
| Hill-Mayer Edwin S. Jr. G #642-435-38534 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,179 | Jun 15, 2007 | — | — |
| Hill-Mayer Edwin S Jr. G #742-435-38535 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | Temporarily abandonedGas | 8,143 | Jun 15, 2007 | — | — |
| Mittel Ben #2242-435-38548 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 7,200 | Jun 15, 2007 | — | — |
| Canyon Ranch #26S42-435-38550 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 4,756 | Jun 15, 2007 | — | — |
| Canyon Ranch #19S42-435-38551 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 4,750 | Jun 15, 2007 | — | — |
| Canyon Ranch #25S42-435-38552 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 4,756 | Jun 15, 2007 | — | — |
| Mittel #150242-435-38553 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | Temporarily abandonedGas | 6,574 | Jun 15, 2007 | — | — |
| Wilson Duke 174 #942-435-38555 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 9,312 | Jun 15, 2007 | — | — |
| Mittel #150442-435-38557 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 7,204 | Jun 15, 2007 | — | — |
| Mittel Ben #1542-435-38558 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 7,334 | Jun 15, 2007 | — | — |
| Bowden #442-435-38559 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,800 | Jun 15, 2007 | — | — |
| Nicks Gerald 8 #142-435-38566 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,722 | Jun 15, 2007 | — | — |
| Hampton Gas Unit #3HHZ42-497-36287 | Upp Operating LLC | Wise, TXNewark East (Barnett Shale) | ActiveGas | 7,750 | Jun 15, 2007 | — | — |
| Mayer #5742-435-38536 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,458 | Jun 13, 2007 | — | — |
| Hill-Mayer ZZ #642-435-38537 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,025 | Jun 13, 2007 | — | — |
| Mayer 37 #1442-435-38538 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,200 | Jun 13, 2007 | — | — |
| Canyon Ranch #1135S42-435-38539 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,800 | Jun 13, 2007 | — | — |
| Mayer 37 #1342-435-38540 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,225 | Jun 13, 2007 | — | — |
| Mayer Ranch NNN 152 #242-435-38543 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,425 | Jun 13, 2007 | — | — |
| Mittel Ben #2142-435-38546 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 7,365 | Jun 13, 2007 | — | — |
| Mittel Ben #1942-435-38547 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,630 | Jun 13, 2007 | — | — |
| Little Buddy #8HHZ42-251-31891 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | Temporarily abandonedGas | 7,402 | Jun 12, 2007 | — | — |