| Mayer Edwin S. Jr. #60442-435-38397 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,260 | Mar 29, 2007 | — | — |
| Canyon Ranch 107 #10E42-137-31877 | Upp Operating LLC | Edwards, TXSawyer (Canyon) | ActiveGas | 7,114 | Mar 28, 2007 | — | — |
| Canyon Ranch 107 #12E42-137-31879 | Upp Operating LLC | Edwards, TXSawyer (Strawn North) | ActiveGas | 7,108 | Mar 28, 2007 | — | — |
| Canyon Ranch 107 #13E42-137-31880 | Upp Operating LLC | Edwards, TXSawyer (Canyon) | ActiveGas | 7,100 | Mar 28, 2007 | — | — |
| Canyon Ranch #1077E42-137-31881 | Upp Operating LLC | Edwards, TXSawyer (Canyon) | ActiveGas | 7,114 | Mar 28, 2007 | — | — |
| Canyon Ranch #1078E42-137-31882 | Upp Operating LLC | Edwards, TXSawyer (Canyon) | ActiveGas | 7,135 | Mar 28, 2007 | — | — |
| Canyon Ranch 115 #21S42-435-38390 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,650 | Mar 28, 2007 | — | — |
| Broyles a #1HHZ42-221-31313 | Upp Operating LLC | Hood, TXNewark East (Barnett Shale) | ActiveGas | 6,017 | Mar 27, 2007 | — | — |
| Maples #3 HHZ42-251-31628 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,830 | Mar 27, 2007 | — | — |
| Wilson Duke 173 #1842-435-38385 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 9,100 | Mar 27, 2007 | — | — |
| Canyon Ranch 105 #16S42-435-38386 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,821 | Mar 27, 2007 | — | — |
| Canyon Ranch 105 #18S42-435-38387 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,909 | Mar 27, 2007 | — | — |
| Hughes Unit #2HHZ42-251-31600 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,732 | Mar 26, 2007 | — | — |
| Hill Vella #4HHZ42-251-31617 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,184 | Mar 26, 2007 | — | — |
| Kemp B #4HHZ42-251-31622 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,113 | Mar 26, 2007 | — | — |
| Mayer Edwin S. Jr. S #742-435-38380 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,230 | Mar 26, 2007 | — | — |
| Rimel #842-435-38381 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,311 | Mar 26, 2007 | — | — |
| Canyon Ranch #1139S42-435-38383 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 6,808 | Mar 26, 2007 | — | — |
| Simmons Ranch #10642-435-38388 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,015 | Mar 26, 2007 | — | — |
| Simmons Ranch #10742-435-38389 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,026 | Mar 26, 2007 | — | — |
| Westside #1RHHZ42-139-30498 | Upp Operating LLC | Ellis, TXNewark East (Barnett Shale) | ActiveGas | 8,575 | Mar 23, 2007 | — | — |
| Westside #2HHZ42-139-30499 | Upp Operating LLC | Ellis, TXNewark East (Barnett Shale) | ActiveGas | 8,607 | Mar 23, 2007 | — | — |
| Mildred #1HHZ42-251-31596 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | PluggedGas | 7,800 | Mar 23, 2007 | — | — |
| Dodson #1HHZ42-251-31598 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,409 | Mar 23, 2007 | — | — |
| Wilkes #2 HHZ42-251-31601 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,747 | Mar 23, 2007 | — | — |
| Wilkes #3 HHZ42-251-31602 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,755 | Mar 23, 2007 | — | — |
| Kemp B #6HHZ42-251-31594 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,079 | Mar 22, 2007 | — | — |
| Hicks 22 #2142-435-38368 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,736 | Mar 22, 2007 | — | — |
| Hicks 22 #2242-435-38369 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,728 | Mar 22, 2007 | — | — |
| Hicks 22 #2342-435-38370 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,731 | Mar 22, 2007 | — | — |
| Hicks 22 #2442-435-38371 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,785 | Mar 22, 2007 | — | — |
| Southard Farms #1 HHZ42-251-31591 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,886 | Mar 21, 2007 | — | — |
| Southard Farms #2 HHZ42-251-31592 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,952 | Mar 21, 2007 | — | — |
| Hardcastle #11 HHZ42-251-31611 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,586 | Mar 21, 2007 | — | — |
| Hicks 22 #2042-435-38367 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,950 | Mar 21, 2007 | — | — |
| Hicks 22 #1942-435-38374 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,758 | Mar 21, 2007 | — | — |
| Hubbard #2 HHZ42-251-31577 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | PluggedGas | 10,000 | Mar 20, 2007 | — | — |
| Robinson #2HHZ42-251-31587 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,929 | Mar 20, 2007 | — | — |
| Mayer Edwin S. Jr. #3042-435-38366 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 8,241 | Mar 20, 2007 | — | — |
| Wilson #2 HHZ42-251-31582 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,832 | Mar 19, 2007 | — | — |
| Wilson #3 HHZ42-251-31583 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,656 | Mar 19, 2007 | — | — |
| Rayburn Unit #9HHZ42-251-31584 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,098 | Mar 19, 2007 | — | — |
| Kemp B Unit #5HHZ42-251-31593 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,039 | Mar 19, 2007 | — | — |
| Hill-Mayer Edwin S. Jr. BB #542-435-38362 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,184 | Mar 19, 2007 | — | — |
| Simmons Ranch #11142-435-38365 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,899 | Mar 19, 2007 | — | — |
| University 54-24 #242-413-32450 | Upp Operating LLC | Schleicher, TXOzona NE. (Canyon 7520) | ActiveGas | 8,225 | Mar 16, 2007 | — | — |
| Kelly 126 #2442-435-38355 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,600 | Mar 16, 2007 | — | — |
| Kelly 126 #2542-435-38356 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,841 | Mar 16, 2007 | — | — |
| Kelly 126 #2642-435-38357 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,671 | Mar 16, 2007 | — | — |
| Bell J. C. Estate #2HHZ42-251-31580 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,921 | Mar 15, 2007 | — | — |