| Genini 31 #2242-435-38880 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,343 | Mar 20, 2008 | — | — |
| Genini 31 #2442-435-38881 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,400 | Mar 20, 2008 | — | — |
| Shurley RR 4B #542-435-38882 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,551 | Mar 20, 2008 | — | — |
| Shurley RR 4B #442-435-38883 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,370 | Mar 20, 2008 | — | — |
| Davis D #1842-435-38869 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,068 | Mar 19, 2008 | — | — |
| University 56-22 #1342-105-40598 | Upp Operating LLC | Crockett, TXOzona NE. (Canyon 7520) | ActiveGas | 8,902 | Mar 18, 2008 | — | — |
| Powell 8 #442-413-32509 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 8,400 | Mar 18, 2008 | — | — |
| Jeffers 28 B #442-413-32510 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 8,581 | Mar 18, 2008 | — | — |
| Shurley RR 1F #942-435-38870 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,675 | Mar 17, 2008 | — | — |
| Genini 39 #1642-435-38871 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,659 | Mar 17, 2008 | — | — |
| Genini 39 #2142-435-38873 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,725 | Mar 17, 2008 | — | — |
| Genini 39 #2242-435-38874 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,800 | Mar 17, 2008 | — | — |
| Genini 39 #2542-435-38875 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,750 | Mar 17, 2008 | — | — |
| Meckel #9542-435-38912 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 5,949 | Mar 14, 2008 | — | — |
| Meckel #9642-435-38913 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 5,973 | Mar 14, 2008 | — | — |
| Mayer Edwin S. Jr. B 38 #542-435-38916 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,470 | Mar 14, 2008 | — | — |
| Mayer Edwin S. Jr. B 38 #442-435-38917 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,530 | Mar 14, 2008 | — | — |
| Meckel #9442-435-38911 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,073 | Mar 13, 2008 | — | — |
| Steen #10042-435-38915 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 5,846 | Mar 13, 2008 | — | — |
| Mayer Edwin S. Jr. C #30642-435-38906 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 7,967 | Mar 11, 2008 | — | — |
| Hill-Mayer Edwin S. Jr. F #642-435-38907 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,100 | Mar 11, 2008 | — | — |
| Deberry-Berger Unit #2142-435-38909 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,652 | Mar 11, 2008 | — | — |
| Bowerman Carter Unit #1HHZ42-251-32701 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,460 | Mar 10, 2008 | — | — |
| Bowerman Carter Unit #2HHZ42-251-32702 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,460 | Mar 10, 2008 | — | — |
| Mayer Ranch 41 #242-435-38910 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,800 | Mar 10, 2008 | — | — |
| Hill-Mayer Edwin S. Jr. Z #742-435-38903 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 7,925 | Mar 7, 2008 | — | — |
| Barton #1942-435-38904 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,759 | Mar 7, 2008 | — | — |
| Rhome Estate #1HHZ42-251-32695 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,203 | Mar 6, 2008 | — | — |
| Zora Mae #3HHZ42-251-32697 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,482 | Mar 6, 2008 | — | — |
| Zora Mae #4HHZ42-251-32698 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,501 | Mar 6, 2008 | — | — |
| Mayfield 33 #25HHZ42-435-38901 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 7,115 | Mar 5, 2008 | — | — |
| Jones 118 #3042-435-38891 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,488 | Mar 4, 2008 | — | — |
| Jones 118 #3142-435-38892 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,401 | Mar 4, 2008 | — | — |
| Uta a Unit #4HHZ42-439-33162 | Upp Operating LLC | Tarrant, TXNewark East (Barnett Shale) | Temporarily abandonedGas | 8,365 | Mar 4, 2008 | — | — |
| Uta a Unit #6HHZ42-439-33163 | Upp Operating LLC | Tarrant, TXNewark East (Barnett Shale) | ActiveGas | 8,412 | Mar 4, 2008 | — | — |
| Uta a Unit #5HHZ42-439-33164 | Upp Operating LLC | Tarrant, TXNewark East (Barnett Shale) | ActiveGas | 8,359 | Mar 4, 2008 | — | — |
| Lilly #1HHZ42-251-32674 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,294 | Feb 28, 2008 | — | — |
| Lilly #2HHZ42-251-32675 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,320 | Feb 28, 2008 | — | — |
| Canyon Ranch 114 #18S42-435-38804 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,804 | Feb 28, 2008 | — | — |
| Shurley RR 1D #342-435-38858 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,372 | Feb 28, 2008 | — | — |
| Mayer Ranch DD #280442-435-38899 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,000 | Feb 28, 2008 | — | — |
| Hill-Mayer Edwin S. Jr. B #642-435-38902 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,150 | Feb 28, 2008 | — | — |
| Fleet #9HHZ42-251-32547 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,910 | Feb 27, 2008 | — | — |
| Kemp D #13HHZ42-251-32666 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,893 | Feb 27, 2008 | — | — |
| Kemp D #14HHZ42-251-32668 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,075 | Feb 27, 2008 | — | — |
| Hill-Mayer Edwin S. Jr. K #742-435-38898 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 7,894 | Feb 27, 2008 | — | — |
| Willingham Unit #3HHZ42-251-32661 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,517 | Feb 26, 2008 | — | — |
| Willingham Unit #4HHZ42-251-32662 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,643 | Feb 26, 2008 | — | — |
| Hill-Mayer Edwin S. Jr. K #642-435-38897 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 7,969 | Feb 26, 2008 | — | — |
| Caldwell #2HHZ42-251-32648 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,470 | Feb 25, 2008 | — | — |