| Mayer Ranch 40 #542-435-39227 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 8,298 | Nov 12, 2009 | — | — |
| Mitchell #80442-137-32035 | Upp Operating LLC | Edwards, TXSawyer (Canyon) | ActiveGas | 5,199 | Nov 9, 2009 | — | — |
| Lake Alvarado Unit #6HHZ42-251-33802 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,878 | Nov 9, 2009 | — | — |
| Mayer Ranch 35 #1742-435-39226 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,650 | Nov 9, 2009 | — | — |
| Hough 12 #242-137-32034 | Upp Operating LLC | Edwards, TXSawyer (Canyon) | ActiveGas | 5,776 | Nov 6, 2009 | — | — |
| Mayer Edwin S. Jr. N #1742-413-32607 | Upp Operating LLC | Schleicher, TXSawyer (Canyon) | ActiveGas | 8,709 | Nov 6, 2009 | — | — |
| Rice Loh a Unit #6HHZ42-439-34621 | Upp Operating LLC | Tarrant, TXNewark East (Barnett Shale) | ActiveGas | 8,583 | Nov 6, 2009 | — | — |
| US Lime Unit E #35HHZ42-251-33801 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,256 | Nov 5, 2009 | — | — |
| Wilson Duke #341642-435-39225 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,840 | Oct 21, 2009 | — | — |
| Uta B Unit #24HHZ42-439-34605 | Upp Operating LLC | Tarrant, TXNewark East (Barnett Shale) | ActiveGas | 8,358 | Oct 21, 2009 | — | — |
| Shurley #16442-435-39220 | Upp Operating LLC | Sutton, TXFawcett (Wolfcamp) | ActiveGas | 6,250 | Oct 20, 2009 | — | — |
| Wilson Duke #340942-435-39224 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,869 | Oct 20, 2009 | — | — |
| Mitchell #10642-137-32029 | Upp Operating LLC | Edwards, TXSawyer (Canyon) | ActiveGas | 6,000 | Oct 16, 2009 | — | — |
| US Lime E #34HHZ42-251-33778 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,334 | Oct 16, 2009 | — | — |
| Lancaster 155 #842-435-39223 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,600 | Oct 16, 2009 | — | — |
| Kemp a Unit #15HHZ42-251-33776 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,951 | Oct 15, 2009 | — | — |
| Core Lab #9HHZ42-251-33777 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,502 | Oct 15, 2009 | — | — |
| Ward #8042-435-39221 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,850 | Oct 15, 2009 | — | — |
| Uta a Unit #21HHZ42-439-34597 | Upp Operating LLC | Tarrant, TXNewark East (Barnett Shale) | ActiveGas | 8,364 | Oct 15, 2009 | — | — |
| Lancaster 155 #942-435-39222 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,600 | Oct 14, 2009 | — | — |
| Uta a Unit #22HHZ42-439-34598 | Upp Operating LLC | Tarrant, TXNewark East (Barnett Shale) | ActiveGas | 8,364 | Oct 14, 2009 | — | — |
| Uta B Unit #13HHZ42-439-34589 | Upp Operating LLC | Tarrant, TXNewark East (Barnett Shale) | ActiveGas | 8,337 | Oct 9, 2009 | — | — |
| Mitchell #10542-137-32028 | Upp Operating LLC | Edwards, TXSawyer (Canyon) | Temporarily abandonedGas | 5,975 | Oct 8, 2009 | — | — |
| Ryan #220342-413-32605 | Upp Operating LLC | Schleicher, TXSawyer (Canyon) | ActiveGas | 8,297 | Oct 1, 2009 | — | — |
| Ryan #220542-413-32604 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 8,550 | Sep 30, 2009 | — | — |
| Jeffers AR #842-413-32603 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 8,450 | Sep 29, 2009 | — | — |
| Canyon Ranch 127 #10S42-435-39219 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,570 | Sep 29, 2009 | — | — |
| Mayer Edwin S. Jr. R #442-413-32599 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 8,385 | Sep 28, 2009 | — | — |
| Canyon Ranch #1274S42-435-39217 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,750 | Sep 23, 2009 | — | — |
| Canyon Ranch #1279S42-435-39218 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,750 | Sep 23, 2009 | — | — |
| Mittel R. H. #1542-435-39216 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 7,100 | Sep 22, 2009 | — | — |
| Atkins 119 #442-413-32600 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 7,350 | Sep 21, 2009 | — | — |
| Jeffers 18 #542-413-32601 | Upp Operating LLC | Schleicher, TXSawyer (Canyon) | ActiveGas | 8,400 | Sep 21, 2009 | — | — |
| Atkins 119 #842-413-32602 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 7,200 | Sep 21, 2009 | — | — |
| Mittel R. H. #1642-435-39215 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 7,278 | Sep 21, 2009 | — | — |
| Simmons 3 #1242-435-39214 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,100 | Sep 16, 2009 | — | — |
| Mrs May M Ray #542-435-39213 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 9,455 | Sep 15, 2009 | — | — |
| Hill-May M Ray I #342-435-39212 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | PluggedGas | 9,550 | Sep 14, 2009 | — | — |
| Canyon Ranch 112 #12E42-137-32023 | Upp Operating LLC | Edwards, TXSawyer (Canyon) | ActiveGas | 6,508 | Sep 10, 2009 | — | — |
| Mayer Edwin S. Jr. B #30342-413-32597 | Upp Operating LLC | Schleicher, TXSawyer (Canyon) | ActiveGas | 8,300 | Sep 1, 2009 | — | — |
| Mayer Edwin S. Jr. E #3142-413-32598 | Upp Operating LLC | Schleicher, TXSawyer (Canyon) | ActiveGas | 8,407 | Sep 1, 2009 | — | — |
| Simmons 72 #1942-435-39211 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,150 | Aug 28, 2009 | — | — |
| Evans #4HHZ42-251-33751 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,535 | Aug 27, 2009 | — | — |
| Evans #3HHZ42-251-33752 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,510 | Aug 27, 2009 | — | — |
| Evans Unit #5HHZ42-251-33753 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,540 | Aug 27, 2009 | — | — |
| Mayer Edwin S. Jr. E #2942-413-32596 | Upp Operating LLC | Schleicher, TXSawyer (Canyon) | ActiveGas | 8,277 | Aug 27, 2009 | — | — |
| Wilson Duke 176 #1642-435-39210 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,850 | Aug 27, 2009 | — | — |
| Evans/Randle #5HHZ42-251-33739 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,511 | Aug 21, 2009 | — | — |
| Mayer Ranch 36 #742-435-39206 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,700 | Aug 20, 2009 | — | — |
| Lancaster 3 #642-435-39207 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,609 | Aug 20, 2009 | — | — |