| Bell J. C. Estate #3HHZ42-251-31581 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,815 | Mar 15, 2007 | — | — |
| Genini #312042-435-38338 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,985 | Mar 15, 2007 | — | — |
| Mayer Ranch J #90342-435-38354 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,100 | Mar 15, 2007 | — | — |
| Mayer Edwin S. Jr #60342-435-38364 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,230 | Mar 15, 2007 | — | — |
| Parmer 29 #542-413-32444 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 8,539 | Mar 14, 2007 | — | — |
| Parmer 29 #842-413-32446 | Upp Operating LLC | Schleicher, TXOzona NE. (Canyon 7520) | ActiveGas | 8,584 | Mar 14, 2007 | — | — |
| Parmer 29 #942-413-32447 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 8,650 | Mar 14, 2007 | — | — |
| Parmer 29 #742-413-32448 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 8,700 | Mar 14, 2007 | — | — |
| Hill-Winnie R. Aldwell F #242-435-38363 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,750 | Mar 14, 2007 | — | — |
| Hill Vella #3 HHZ42-251-31585 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,079 | Mar 13, 2007 | — | — |
| Parmer 29 #642-413-32445 | Upp Operating LLC | Schleicher, TXOzona NE. (Canyon 7520) | ActiveGas | 8,554 | Mar 13, 2007 | — | — |
| Winnie R. Aldwell Trust K #842-435-38358 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,900 | Mar 13, 2007 | — | — |
| Mayer Edwin S. Jr. U #1342-435-38359 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,165 | Mar 13, 2007 | — | — |
| Mayer Edwin S. Jr. U #1442-435-38360 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,341 | Mar 13, 2007 | — | — |
| Hill-Winnie R. Aldwell G #342-435-38361 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 8,800 | Mar 13, 2007 | — | — |
| Ezell #3 HHZ42-251-31505 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,730 | Mar 12, 2007 | — | — |
| Ezell Unit #2HHZ42-251-31506 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,855 | Mar 12, 2007 | — | — |
| Parmer 29 #1042-413-32442 | Upp Operating LLC | Schleicher, TXSawyer (Strawn North) | ActiveGas | 8,600 | Mar 12, 2007 | — | — |
| Kelly 126 #2342-435-38350 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,750 | Mar 12, 2007 | — | — |
| Holmes #3HHZ42-251-31558 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,380 | Mar 9, 2007 | — | — |
| Holmes #4HHZ42-251-31559 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | PluggedGas | 8,100 | Mar 9, 2007 | — | — |
| Hill Vella #2 HHZ42-251-31560 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,048 | Mar 9, 2007 | — | — |
| Flores Unit #1HHZ42-251-31566 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,525 | Mar 9, 2007 | — | — |
| Simmons Ranch #11042-435-38342 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,176 | Mar 9, 2007 | — | — |
| Simmons Ranch #10842-435-38340 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,019 | Mar 8, 2007 | — | — |
| Simmons Ranch #10942-435-38341 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,264 | Mar 8, 2007 | — | — |
| Genini #391842-435-38334 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,908 | Mar 7, 2007 | — | — |
| Genini #391542-435-38335 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,424 | Mar 7, 2007 | — | — |
| Genini #391442-435-38339 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,977 | Mar 7, 2007 | — | — |
| Mercer #1 HHZ42-251-31447 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 5,959 | Mar 6, 2007 | — | — |
| Barron #5 HHZ42-251-31527 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,494 | Mar 6, 2007 | — | — |
| Genini #311742-435-38336 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 7,119 | Mar 6, 2007 | — | — |
| Genini #311842-435-38337 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,960 | Mar 6, 2007 | — | — |
| Barron #4 HHZ42-251-31526 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,510 | Mar 5, 2007 | — | — |
| Rayburn #8 HHZ42-251-31549 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,114 | Mar 5, 2007 | — | — |
| Kelly 124 #2742-435-38332 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,737 | Mar 5, 2007 | — | — |
| Kelly 124 #2842-435-38333 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,686 | Mar 5, 2007 | — | — |
| Rayburn #7 HHZ42-251-31548 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,260 | Mar 2, 2007 | — | — |
| Bransom #2 HHZ42-251-31503 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,294 | Mar 1, 2007 | — | — |
| Hill Vella #1 HHZ42-251-31519 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,213 | Mar 1, 2007 | — | — |
| Richardson 139 #1142-435-38320 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,366 | Feb 28, 2007 | — | — |
| Richardson 139 #1242-435-38321 | Upp Operating LLC | Sutton, TXSawyer (Strawn North) | ActiveGas | 8,348 | Feb 28, 2007 | — | — |
| Morriss 63 #742-435-38331 | Upp Operating LLC | Sutton, TXSawyer (Canyon) | ActiveGas | 6,328 | Feb 27, 2007 | — | — |
| Maples #2 HHZ42-251-31464 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 7,743 | Feb 26, 2007 | — | — |
| Double Diamond #7HHZ42-251-31541 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 6,712 | Feb 26, 2007 | — | — |
| Mittel Ben #1842-435-38325 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 7,012 | Feb 26, 2007 | — | — |
| Mittel R. H. #242-435-38326 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 7,150 | Feb 26, 2007 | — | — |
| Mittel Ben #1742-435-38329 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 7,150 | Feb 26, 2007 | — | — |
| Mittel Ben #1642-435-38330 | Upp Operating LLC | Sutton, TXSonora (Canyon Upper) | ActiveGas | 7,100 | Feb 26, 2007 | — | — |
| Robinson #1HHZ42-251-31538 | Upp Operating LLC | Johnson, TXNewark East (Barnett Shale) | ActiveGas | 8,029 | Feb 23, 2007 | — | — |