| Canyon Ranch #1067E42-137-31892 | Upp Operating LLC | Edwards, TXSawyer (Canyon) | Temporarily abandonedGas | 6,906 | May 8, 2007 | — | — |
| Hardcastle #12 HHZ42-251-31759 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,570 | May 8, 2007 | — | — |
| Strange Unit #1HHZ42-251-31760 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,844 | May 8, 2007 | — | — |
| Strange #2HHZ42-251-31762 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,707 | May 8, 2007 | — | — |
| Strange #3HHZ42-251-31763 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,780 | May 8, 2007 | — | — |
| Hughes #3HHZ42-251-31765 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,825 | May 8, 2007 | — | — |
| Goforth #2 HHZ42-367-34414 | Upp Operating LLC | Parker, TXNewark East (Barnett Shale) | ActiveGas | 6,567 | May 8, 2007 | — | — |
| Goforth #4 HHZ42-367-34415 | Upp Operating LLC | Parker, TXNewark East (Barnett Shale) | Temporarily abandonedGas | 6,528 | May 8, 2007 | — | — |
| Shurley 148 #1342-435-38422 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,139 | May 8, 2007 | — | — |
| Shurley 148 #1442-435-38427 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,193 | May 8, 2007 | — | — |
| U.S. Lime C #3 HHZ42-251-31744 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,343 | May 4, 2007 | — | — |
| U.S. Lime C #11 HHZ42-251-31745 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,155 | May 4, 2007 | — | — |
| King #8HHZ42-251-31752 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,269 | May 4, 2007 | — | — |
| Robinson #3HHZ42-251-31753 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,004 | May 4, 2007 | — | — |
| Mayer Ranch N 13 #342-435-38459 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,125 | May 4, 2007 | — | — |
| Shurley 147 #2742-435-38466 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,183 | May 4, 2007 | — | — |
| Shurley 147 #2842-435-38467 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,246 | May 4, 2007 | — | — |
| Shurley 147 #2942-435-38468 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 7,268 | May 4, 2007 | — | — |
| Shurley 147 #3142-435-38469 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,146 | May 4, 2007 | — | — |
| Shurley 147 #3042-435-38470 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,160 | May 4, 2007 | — | — |
| Shurley 166 #2342-435-38471 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,450 | May 4, 2007 | — | — |
| Shurley 165 #1742-435-38472 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,750 | May 4, 2007 | — | — |
| Shurley 166 #2642-435-38473 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,225 | May 4, 2007 | — | — |
| Shurley 166 #2742-435-38474 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,244 | May 4, 2007 | — | — |
| Shurley 166 #2842-435-38475 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,100 | May 4, 2007 | — | — |
| Shurley 166 #2942-435-38476 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,275 | May 4, 2007 | — | — |
| Shurley 166 #2542-435-38477 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,275 | May 4, 2007 | — | — |
| Morris Bros. Ranch K 126 #242-435-38478 | Upp Operating LLC | Sutton, TXWhitehead (Strawn) | ActiveGas | 9,499 | May 3, 2007 | — | — |
| Wilson Duke 188 #2342-435-38480 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,452 | May 3, 2007 | — | — |
| Aldwell Winnie R. Trust #2042-435-38398 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,770 | May 2, 2007 | — | — |
| Rice University #1 HHZ42-251-31742 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,408 | May 1, 2007 | — | — |
| Wilson Duke 189 #1642-435-38479 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 9,000 | May 1, 2007 | — | — |
| Wilson Duke 172 #1842-435-38481 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 8,707 | May 1, 2007 | — | — |
| KD Livestock a #1HHZ42-251-31735 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | PluggedGas | 8,050 | Apr 30, 2007 | — | — |
| KD Livestock a #2HHZ42-251-31737 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | PluggedGas | 8,050 | Apr 30, 2007 | — | — |
| Kelly 35 #1442-435-38465 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,975 | Apr 30, 2007 | — | — |
| KD Livestock a #3HHZ42-251-31727 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | PluggedGas | 8,000 | Apr 26, 2007 | — | — |
| Wilson #1HHZ42-251-31714 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,762 | Apr 25, 2007 | — | — |
| Wilson #4 HHZ42-251-31715 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,736 | Apr 25, 2007 | — | — |
| Powell 23 #642-413-32460 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 8,450 | Apr 24, 2007 | — | — |
| Simmons 72 #1142-435-38464 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,050 | Apr 24, 2007 | — | — |
| Little Buddy #10HHZ42-251-31712 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | Temporarily abandonedGas | 7,512 | Apr 23, 2007 | — | — |
| Hill-Mayer Edwin S. Jr. #s 642-435-38442 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,094 | Apr 18, 2007 | — | — |
| Shurley 142 #3242-435-38448 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,125 | Apr 18, 2007 | — | — |
| Shurley 142 #2942-435-38452 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,875 | Apr 18, 2007 | — | — |
| Shurley 142 #2842-435-38453 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,067 | Apr 18, 2007 | — | — |
| Shurley 142 #2742-435-38454 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,075 | Apr 18, 2007 | — | — |
| Shurley 142 #3042-435-38455 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,935 | Apr 18, 2007 | — | — |
| Shurley 142 #3142-435-38456 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,071 | Apr 18, 2007 | — | — |
| Shurley 142 #2642-435-38457 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,083 | Apr 18, 2007 | — | — |