| Mayer Ranch 40 #1142-435-39024 | Upp Operating LLC | Sutton, TXKelley (Ellenburger) | ActiveGas | 8,618 | Jul 3, 2008 | — | — |
| Pfluger 85 #1042-435-34936 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 5,410 | Jul 1, 2008 | — | — |
| University 56-19 #342-105-40745 | Upp Operating LLC | Crockett, TXOzona NE. (Canyon 7520) | ActiveGas | 8,685 | Jun 28, 2008 | — | — |
| University 56-18 #642-105-40747 | Upp Operating LLC | Crockett, TXOzona NE. (Canyon 7520) | Temporarily abandonedGas | 8,688 | Jun 28, 2008 | — | — |
| University 54-24 #142-413-32528 | Upp Operating LLC | Schleicher, TXKelley (Ellenburger) | ActiveGas | 8,300 | Jun 27, 2008 | — | — |
| Powell 3 #142-413-32529 | Upp Operating LLC | Schleicher, TXSawyer (Canyon) | ActiveGas | 8,400 | Jun 27, 2008 | — | — |
| Mayer Ranch 41 #142-435-39018 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,495 | Jun 26, 2008 | — | — |
| McMullen Ranch D 111 #442-105-40622 | Upp Operating LLC | Crockett, TXWhitehead (Strawn) | ActiveGas | 9,057 | Jun 23, 2008 | — | — |
| McMullen Ranch D 111 #342-105-40623 | Upp Operating LLC | Crockett, TXWhitehead (Strawn) | ActiveGas | 9,002 | Jun 23, 2008 | — | — |
| Beasley Ranch a #730342-105-40624 | Upp Operating LLC | Crockett, TXWhitehead (Strawn) | ActiveGas | 9,150 | Jun 23, 2008 | — | — |
| Deberry a #9942-435-39013 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 6,563 | Jun 21, 2008 | — | — |
| Hill-Mayer Edwin S. Jr. BB #642-435-39009 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,223 | Jun 20, 2008 | — | — |
| Sawyer-Jones #160842-435-39012 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 8,916 | Jun 18, 2008 | — | — |
| Fry #4HHZ42-251-32756 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 5,979 | Jun 17, 2008 | — | — |
| Canyon Ranch #2165S42-435-39011 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,028 | Jun 16, 2008 | — | — |
| Canyon Ranch #9014E42-137-31954 | Upp Operating LLC | Edwards, TXSawyer (Canyon) | ActiveGas | 6,862 | Jun 13, 2008 | — | — |
| Canyon Ranch 207 #24S42-435-39007 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,808 | Jun 13, 2008 | — | — |
| Canyon Ranch 207 #26S42-435-39008 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,788 | Jun 13, 2008 | — | — |
| Canyon Ranch #2162S42-435-39010 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 7,003 | Jun 13, 2008 | — | — |
| Simmons 72 #1542-435-39006 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,300 | Jun 12, 2008 | — | — |
| Simmons 3 #842-435-39002 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,086 | Jun 11, 2008 | — | — |
| Simmons 71 #1442-435-39003 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,214 | Jun 11, 2008 | — | — |
| Richardson 4 #1442-435-39005 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,507 | Jun 11, 2008 | — | — |
| Richardson 138 #1842-435-38999 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,514 | Jun 10, 2008 | — | — |
| Mayer Ranch G #70342-435-39001 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,384 | Jun 10, 2008 | — | — |
| Mills #3HHZ42-251-32982 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | Temporarily abandonedGas | 5,960 | Jun 9, 2008 | — | — |
| Mills #1HHZ42-425-30192 | Upp Operating LLC | Somervell, TXNewark East (Barnett Shale) | ActiveGas | 6,002 | Jun 7, 2008 | — | — |
| Mills #2HHZ42-425-30193 | Upp Operating LLC | Somervell, TXNewark East (Barnett Shale) | ActiveGas | 5,976 | Jun 7, 2008 | — | — |
| Stubbe #3HHZ42-251-32975 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,832 | Jun 6, 2008 | — | — |
| Stubbe #4HHZ42-251-32976 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,088 | Jun 6, 2008 | — | — |
| Ferguson Foundation #10HHZ42-251-32978 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,346 | Jun 6, 2008 | — | — |
| Ferguson Foundation #11HHZ42-251-32990 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,232 | Jun 6, 2008 | — | — |
| Lancaster 185 #242-435-39000 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,001 | Jun 6, 2008 | — | — |
| Valliant #1642-435-38976 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,616 | Jun 3, 2008 | — | — |
| Hill-Mayer Edwin S. Jr. y #342-435-38995 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,178 | Jun 2, 2008 | — | — |
| Thelma Louise #7HHZ42-251-32937 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,991 | May 29, 2008 | — | — |
| Thelma Louise #8HHZ42-251-32939 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,073 | May 29, 2008 | — | — |
| Ward 127 #2442-435-38992 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 7,914 | May 23, 2008 | — | — |
| Ward 127 #2242-435-38993 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 7,915 | May 23, 2008 | — | — |
| Simmons 73 #1242-435-38988 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,166 | May 21, 2008 | — | — |
| Kirk Jay #1HHZ42-217-30614 | Upp Operating LLC | Hill, TXNewark East (Barnett Shale) | ActiveGas | 8,407 | May 20, 2008 | — | — |
| Kemp D #12HHZ42-251-32838 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,925 | May 20, 2008 | — | — |
| Canyon Ranch 207 #11S42-435-38523 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,815 | May 20, 2008 | — | — |
| Simmons 72 #1242-435-38763 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,125 | May 20, 2008 | — | — |
| Simmons 3 #942-435-38984 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,300 | May 20, 2008 | — | — |
| Hill-Mayer Minnie H. B #642-435-38985 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 7,880 | May 20, 2008 | — | — |
| Stewart #20542-435-38989 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | Temporarily abandonedGas | 5,502 | May 20, 2008 | — | — |
| Versfelt #2HHZ42-221-31644 | Upp Operating LLC | Hood, TXNewark East (Barnett Shale) | Temporarily abandonedGas | 6,120 | May 19, 2008 | — | — |
| Versfelt #3HHZ42-221-31646 | Upp Operating LLC | Hood, TXNewark East (Barnett Shale) | ActiveGas | 6,069 | May 19, 2008 | — | — |
| Genini #312842-435-38964 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,030 | May 19, 2008 | — | — |