| Canyon Ranch 105 #17S42-435-38806 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,016 | Dec 13, 2007 | — | — |
| Mayer Ranch 40 #142-435-38810 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,442 | Dec 13, 2007 | — | — |
| Clements John F. #1HHZ42-251-32416 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,930 | Dec 12, 2007 | — | — |
| Clements #8HHZ42-251-32421 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,857 | Dec 12, 2007 | — | — |
| Pallmeyer Unit #1HHZ42-251-32423 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | Temporarily abandonedGas | 7,730 | Dec 12, 2007 | — | — |
| Pallmeyer Unit #2HHZ42-251-32424 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | Temporarily abandonedGas | 7,680 | Dec 12, 2007 | — | — |
| Pallmeyer Unit #3HHZ42-251-32425 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | Temporarily abandonedGas | 7,598 | Dec 12, 2007 | — | — |
| Pallmeyer Unit #4HHZ42-251-32426 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | Temporarily abandonedGas | 7,539 | Dec 12, 2007 | — | — |
| Wolfe #2HHZ42-251-32427 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,218 | Dec 12, 2007 | — | — |
| Pallmeyer Unit #5HHZ42-251-32428 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | Temporarily abandonedGas | 7,622 | Dec 12, 2007 | — | — |
| Ryan #220242-413-32494 | Upp Operating LLC | Schleicher, TXSawyer (Canyon) | ActiveGas | 8,500 | Dec 12, 2007 | — | — |
| Shurley 139 #542-435-38756 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,925 | Dec 12, 2007 | — | — |
| Mayfield 32 #2142-435-38778 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,325 | Dec 12, 2007 | — | — |
| Canyon Ranch #39S42-435-38780 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 5,747 | Dec 12, 2007 | — | — |
| Canyon Ranch 207 #20S42-435-38782 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 7,117 | Dec 12, 2007 | — | — |
| Canyon Ranch #116S42-435-38807 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 5,700 | Dec 12, 2007 | — | — |
| Clements John F. #2HHZ42-251-32417 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,903 | Dec 11, 2007 | — | — |
| Clements #9HHZ42-251-32422 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,838 | Dec 11, 2007 | — | — |
| Clark 58 #442-413-32497 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 7,992 | Dec 11, 2007 | — | — |
| Wilson Duke #211342-435-38757 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 9,000 | Dec 11, 2007 | — | — |
| Stewart #6HHZ42-251-32393 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,415 | Dec 6, 2007 | — | — |
| Stewart #7HHZ42-251-32394 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,524 | Dec 6, 2007 | — | — |
| Stewart #8HHZ42-251-32395 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,435 | Dec 6, 2007 | — | — |
| Stewart #9HHZ42-251-32396 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,524 | Dec 6, 2007 | — | — |
| Stewart #10342-435-38776 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 5,519 | Nov 30, 2007 | — | — |
| Barron Unit #10HHZ42-251-32377 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,391 | Nov 29, 2007 | — | — |
| Simmons 72 #1442-435-38764 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,010 | Nov 28, 2007 | — | — |
| Hill-Rousselot F #342-413-32491 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 8,750 | Nov 26, 2007 | — | — |
| Kolar #9HHZ42-251-32361 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,788 | Nov 16, 2007 | — | — |
| Simmons 73 #1142-435-38760 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,150 | Nov 16, 2007 | — | — |
| Simmons 73 #1042-435-38761 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,025 | Nov 16, 2007 | — | — |
| Simmons 72 #1342-435-38762 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,010 | Nov 16, 2007 | — | — |
| Simmons 71 #1142-435-38765 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,050 | Nov 16, 2007 | — | — |
| Simmons 71 #1242-435-38766 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,025 | Nov 16, 2007 | — | — |
| Simmons 71 #1342-435-38767 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,025 | Nov 16, 2007 | — | — |
| Diebitsch 70 #1442-435-38768 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,025 | Nov 16, 2007 | — | — |
| Diebitsch 70 #1542-435-38769 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,018 | Nov 16, 2007 | — | — |
| Stewart #30642-435-38771 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 5,696 | Nov 16, 2007 | — | — |
| Kolar #8HHZ42-251-32355 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,779 | Nov 15, 2007 | — | — |
| Simmons 73 #942-435-38759 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,096 | Nov 15, 2007 | — | — |
| King #10HHZ42-251-31686 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,273 | Nov 14, 2007 | — | — |
| Bee County School Land #1842-435-38758 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,325 | Nov 13, 2007 | — | — |
| Beckham Unit #5HHZ42-251-32347 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,821 | Nov 12, 2007 | — | — |
| Meador 178 #542-413-32477 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 7,700 | Nov 12, 2007 | — | — |
| Powell 8 #342-413-32489 | Upp Operating LLC | Schleicher, TXOzona NE. (Canyon 7520) | ActiveGas | 8,411 | Nov 12, 2007 | — | — |
| Harry #2HHZ42-251-32349 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,632 | Nov 9, 2007 | — | — |
| Valliant LR #30742-435-38727 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,750 | Nov 9, 2007 | — | — |
| Mayer Ranch 35 #742-435-38751 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,440 | Nov 7, 2007 | — | — |
| Mayer Ranch 35 #842-435-38752 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,538 | Nov 7, 2007 | — | — |
| Mayer Ranch 40 #442-435-38754 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,540 | Nov 7, 2007 | — | — |