| Wilson Duke 171 #2542-435-38791 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,400 | Jan 14, 2008 | — | — |
| Wilson Duke 171 #2642-435-38792 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,920 | Jan 14, 2008 | — | — |
| Wilson Duke 171 #2742-435-38793 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,700 | Jan 14, 2008 | — | — |
| Wilson Duke 171 #2842-435-38794 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,500 | Jan 14, 2008 | — | — |
| Wilson Duke 171 #1742-435-38795 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,801 | Jan 14, 2008 | — | — |
| Wilson Duke 189 #2742-435-38800 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 9,027 | Jan 14, 2008 | — | — |
| Mayer Ranch 35 #942-435-38836 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,470 | Jan 14, 2008 | — | — |
| Vanderstucken Joe M. #1542-435-38830 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,770 | Jan 11, 2008 | — | — |
| Ward 114 #2442-435-38826 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,684 | Jan 10, 2008 | — | — |
| University 56-22 #1142-105-40510 | Upp Operating LLC | Crockett, TXOzona NE. (Canyon 7520) | ActiveGas | 8,690 | Jan 9, 2008 | — | — |
| Mayer Edwin S. Jr. N #1142-413-32500 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 8,469 | Jan 9, 2008 | — | — |
| Hill-Mayer Edwins S. Jr J #642-435-38827 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,972 | Jan 9, 2008 | — | — |
| Hill-Mayer Edwin S. Jr J #742-435-38828 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 7,985 | Jan 9, 2008 | — | — |
| Hill-Mayer Edwin S. Jr. J #842-435-38829 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,028 | Jan 9, 2008 | — | — |
| Canyon Ranch 207 #21S42-435-38781 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,048 | Jan 8, 2008 | — | — |
| Canyon Ranch 207 #19S42-435-38789 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,990 | Jan 8, 2008 | — | — |
| Wilson Duke 189 #1942-435-38796 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 9,000 | Jan 8, 2008 | — | — |
| Wilson Duke 189 #2142-435-38797 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 9,000 | Jan 8, 2008 | — | — |
| Wilson Duke 189 #2442-435-38798 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 9,020 | Jan 8, 2008 | — | — |
| Wilson Duke 189 #2242-435-38799 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 9,001 | Jan 8, 2008 | — | — |
| Wilson Duke 189 #2842-435-38801 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 9,200 | Jan 8, 2008 | — | — |
| Wilson Duke 189 #2642-435-38802 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 9,029 | Jan 8, 2008 | — | — |
| Mayfield 46 #2542-435-38832 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,350 | Jan 8, 2008 | — | — |
| Canyon Ranch 207 #18S42-435-38779 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,032 | Jan 7, 2008 | — | — |
| Canyon Ranch #1068E42-137-31939 | Upp Operating LLC | Edwards, TXSawyer (Canyon) | Temporarily abandonedGas | 6,747 | Jan 4, 2008 | — | — |
| Whitehead 6 #642-435-38824 | Upp Operating LLC | Sutton, TXWhitehead (Strawn) | ActiveGas | 8,741 | Jan 3, 2008 | — | — |
| John F Clements #3HHZ42-251-32418 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,896 | Jan 2, 2008 | — | — |
| Maples #10HHZ42-251-32479 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,573 | Jan 2, 2008 | — | — |
| Mayfield 45 #2242-435-38814 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,406 | Jan 2, 2008 | — | — |
| Richardson 6 #942-435-38816 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,372 | Jan 2, 2008 | — | — |
| Maples #11HHZ42-251-32480 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,726 | Dec 28, 2007 | — | — |
| Parmer 30 #342-413-32492 | Upp Operating LLC | Schleicher, TXOzona NE. (Canyon 7520) | ActiveGas | 8,650 | Dec 27, 2007 | — | — |
| Shurley RR 2A #742-435-38772 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 9,054 | Dec 27, 2007 | — | — |
| Mayfield 33 #2442-435-38777 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,572 | Dec 21, 2007 | — | — |
| Brice Unit #3HHZ42-251-32471 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,452 | Dec 20, 2007 | — | — |
| Brice Unit #4HHZ42-251-32472 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,414 | Dec 20, 2007 | — | — |
| Evans 120 #142-413-32499 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 7,150 | Dec 20, 2007 | — | — |
| Shurley RR 2A #942-435-38774 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,241 | Dec 20, 2007 | — | — |
| Mittel R. H. #1142-435-38812 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 7,118 | Dec 20, 2007 | — | — |
| Canyon Ranch 107 #14E42-137-31936 | Upp Operating LLC | Edwards, TXSawyer (Canyon) | Temporarily abandonedGas | 6,750 | Dec 19, 2007 | — | — |
| Scott #1HHZ42-251-32451 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,009 | Dec 19, 2007 | — | — |
| Scott #2HHZ42-251-32453 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | Temporarily abandonedGas | 8,048 | Dec 19, 2007 | — | — |
| Fleet Unit #5HHZ42-251-32469 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,897 | Dec 19, 2007 | — | — |
| Uta a Unit #2HHZ42-439-32918 | Upp Operating LLC | Tarrant, TXNewark East (Barnett Shale) | ActiveGas | 8,402 | Dec 19, 2007 | — | — |
| Hill Vella #5HHZ42-251-32447 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,294 | Dec 17, 2007 | — | — |
| Hill Vella #6HHZ42-251-32449 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,171 | Dec 17, 2007 | — | — |
| Clark 58 #542-413-32495 | Upp Operating LLC | Schleicher, TXSawyer (Canyon) | ActiveGas | 7,992 | Dec 17, 2007 | — | — |
| Meador 57 #342-413-32496 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 7,987 | Dec 17, 2007 | — | — |
| Canyon Ranch #1272S42-435-38805 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 6,762 | Dec 17, 2007 | — | — |
| Canyon Ranch 106 #9E42-137-31933 | Upp Operating LLC | Edwards, TXSawyer (Canyon) | ActiveGas | 6,790 | Dec 13, 2007 | — | — |