| Lowe M. R. 15 #842-003-43275 | Highmark Energy Operating LLC | Andrews, TXFullerton | ActiveOil | 7,258 | Aug 12, 2011 | — | — |
| Doyle Robert B #5619HHZ42-295-33740 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,841 | Jul 14, 2011 | — | — |
| Conroe Field Unit #416042-339-30473 | Highmark Energy Operating LLC | Montgomery, TXConroe | Shut inOil | 6,114 | Jul 12, 2011 | — | — |
| William Schultz #5626HHZ42-295-33720 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,753 | Jul 8, 2011 | — | — |
| Born 332 #1HHZ42-295-33738 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveOil | 8,204 | Jul 8, 2011 | — | — |
| Price Willis D. #23HHZ42-295-33734 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,771 | Jul 6, 2011 | — | — |
| Waters Ranch 330 #1HHZ42-295-33729 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveOil | 8,138 | Jun 28, 2011 | — | — |
| Conroe Field Unit #32042-339-31098 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveOil | 8,628 | Jun 27, 2011 | — | — |
| Bitler-Lowe Clearfork Unit #3842-003-43075 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,290 | Jun 21, 2011 | — | — |
| Devin 187 #2HHZ42-295-33716 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveOil | 8,593 | Jun 8, 2011 | — | — |
| Bitler-Lowe Clearfork Unit #3742-003-43008 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,315 | Jun 7, 2011 | — | — |
| Bitler-Lowe -B- #2142-003-43007 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,324 | Jun 6, 2011 | — | — |
| Burrus 186 #3HHZ42-295-33713 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Shut inOil | 8,586 | May 31, 2011 | — | — |
| Burrus 187 #1VHHZ42-295-33710 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Shut inOil | 8,607 | May 19, 2011 | — | — |
| Doyle Robert B. #3707HHZ42-295-33694 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,843 | May 17, 2011 | — | — |
| Schultz Brothers B #6693HHZ42-295-33708 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,670 | May 17, 2011 | — | — |
| Doyle J.B. #15HHZ42-295-33706 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,825 | May 16, 2011 | — | — |
| Brownlee 128 #4HHZ42-357-33011 | Highmark Energy Operating LLC | Ochiltree, TXPan Petro (Cleveland) | ActiveOil | 7,692 | Apr 29, 2011 | — | — |
| Reba N Miller #10HHZ42-295-33683 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,796 | Apr 22, 2011 | — | — |
| Bitler-Lowe -B- #1842-003-42838 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,313 | Apr 18, 2011 | — | — |
| Bitler-Lowe -B- #1942-003-42839 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,318 | Apr 18, 2011 | — | — |
| Bitler-Lowe Clearfork Unit #3342-003-42840 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,304 | Apr 18, 2011 | — | — |
| Bitler-Lowe Clearfork Unit #3042-003-42841 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,320 | Apr 18, 2011 | — | — |
| Doyle J.B. #7706HHZ42-295-33671 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,726 | Apr 12, 2011 | — | — |
| Doyle J.B. #8706HHZ42-295-33668 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,781 | Mar 24, 2011 | — | — |
| Price Willis D. #22HHZ42-295-33678 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,863 | Mar 18, 2011 | — | — |
| Braum 709 #1HHZ42-295-33676 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveOil | 7,729 | Mar 15, 2011 | — | — |
| Doyle 708 #4HHZ42-295-33677 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveOil | 7,816 | Mar 15, 2011 | — | — |
| Shafter Lake Clearfork Unit #507842-003-39235 | Highmark Energy Operating LLC | Andrews, TXShafter Lake (Clear Fork) | ActiveOil | 6,999 | Mar 9, 2011 | — | — |
| Brownlee 128 #3HHZ42-357-32992 | Highmark Energy Operating LLC | Ochiltree, TXPan Petro (Cleveland) | ActiveOil | 7,707 | Mar 8, 2011 | — | — |
| Doyle 708 #5HHZ42-295-33659 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveOil | 7,771 | Feb 24, 2011 | — | — |
| Sanders 391 #2HHZ42-357-32985 | Highmark Energy Operating LLC | Ochiltree, TXPan Petro (Cleveland) | ActiveOil | 7,333 | Feb 15, 2011 | — | — |
| Leslie 223 #2HHZ42-357-32984 | Highmark Energy Operating LLC | Ochiltree, TXPan Petro (Cleveland) | ActiveOil | 7,427 | Feb 14, 2011 | — | — |
| Doyle Robert B #4707HHZ42-295-33649 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,815 | Jan 27, 2011 | — | — |
| Leslie 223 #1HHZ42-357-32981 | Highmark Energy Operating LLC | Ochiltree, TXPan Petro (Cleveland) | ActiveOil | 7,451 | Jan 25, 2011 | — | — |
| Appel 438 #142-295-32992 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb E. (Des Moines) | Shut inOil | 10,150 | Jan 14, 2011 | — | — |
| Swink 402 #1HHZ42-357-32978 | Highmark Energy Operating LLC | Ochiltree, TXPan Petro (Cleveland) | ActiveOil | 7,354 | Jan 12, 2011 | — | — |
| Tyson D.R. #3623HHZ42-295-33642 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,765 | Jan 7, 2011 | — | — |
| Doyle Robert B #9619HHZ42-295-33641 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,938 | Jan 4, 2011 | — | — |
| Conroe Field Unit #231542-339-31089 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveOil | 6,504 | Dec 7, 2010 | — | — |
| Glass 308 #2HHZ42-357-32963 | Highmark Energy Operating LLC | Ochiltree, TXPan Petro (Cleveland) | ActiveOil | 7,261 | Nov 16, 2010 | — | — |
| Slavin 110 #2HHZ42-357-32962 | Highmark Energy Operating LLC | Ochiltree, TXPan Petro (Cleveland) | ActiveOil | 7,159 | Nov 15, 2010 | — | — |
| Price Willis D. #21HHZ42-295-33628 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,782 | Nov 1, 2010 | — | — |
| Swink 390 #2HHZ42-357-32953 | Highmark Energy Operating LLC | Ochiltree, TXPan Petro (Cleveland) | Shut inOil | 7,339 | Oct 21, 2010 | — | — |
| Peyton 111 #1HHZ42-357-32954 | Highmark Energy Operating LLC | Ochiltree, TXPan Petro (Cleveland) | ActiveOil | 7,198 | Oct 21, 2010 | — | — |
| Prentice Northeast Unit #742-445-00349 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveInjection | 7,350 | Sep 13, 2010 | — | — |
| Glass 308 #1HHZ42-357-32945 | Highmark Energy Operating LLC | Ochiltree, TXPan Petro (Cleveland) | ActiveOil | 7,201 | Sep 3, 2010 | — | — |
| Prentice Northeast Unit #618HHZ42-445-32082 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,385 | Aug 6, 2010 | — | — |
| Ouida Wilson 45 #5HHZ42-357-32932 | Highmark Energy Operating LLC | Ochiltree, TXPan Petro (Cleveland) | Shut inOil | 7,506 | Jul 14, 2010 | — | — |
| Doyle J.B. #742-295-33006 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 8,200 | Jun 18, 2010 | — | — |