| Price Willis D. #16HHZ42-295-33019 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,858 | Apr 19, 2006 | — | — |
| Lowe M. R. 15 #142-003-39840 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,355 | Apr 17, 2006 | — | — |
| Weidner 798 #3HHZ42-295-33018 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,711 | Apr 13, 2006 | — | — |
| Wiederstein 527 #1HHZ42-295-33013 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 8,123 | Mar 31, 2006 | — | — |
| Tregellas 675 #3HHZ42-295-33009 | Highmark Energy Operating LLC | Lipscomb, TXPan Petro (Cleveland) | ActiveOil | 7,269 | Mar 28, 2006 | — | — |
| Prentice Northeast Unit #61742-445-32120 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 7,434 | Mar 23, 2006 | — | — |
| University C #242-003-01416 | Highmark Energy Operating LLC | Andrews, TXShafter Lake (Yates) | ActiveOil | 10,001 | Mar 15, 2006 | — | — |
| Schultz 696 #5HHZ42-295-32994 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,709 | Mar 13, 2006 | — | — |
| Prentice Northeast Unit #60942-445-32118 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 7,356 | Mar 9, 2006 | — | — |
| Moody E. #742-339-00666 | Highmark Energy Operating LLC | Montgomery, TXConroe (Cons. U) | Temporarily abandonedGas | 5,117 | Mar 6, 2006 | — | — |
| Deep Rock Etal -a- #9G42-003-39833 | Highmark Energy Operating LLC | Andrews, TXDeep Rock (Glorieta 5950) | ActiveOil | 6,105 | Feb 23, 2006 | — | — |
| Miles Hayden a #5G42-003-39834 | Highmark Energy Operating LLC | Andrews, TXDeep Rock (Glorieta 5950) | Shut inOil | 6,095 | Feb 23, 2006 | — | — |
| Miles Hayden B #5G42-003-39835 | Highmark Energy Operating LLC | Andrews, TXDeep Rock (Glorieta 5950) | Shut inOil | 6,202 | Feb 23, 2006 | — | — |
| Fairway /James Lime/ Unit #252242-213-30901 | Highmark Energy Operating LLC | Henderson, TXFairway (James Lime) | ActiveOil | 10,205 | Feb 21, 2006 | — | — |
| Miller Reba #642-295-32998 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Atoka 9200) | ActiveGas | 9,503 | Feb 16, 2006 | — | — |
| Prentice Northeast Unit #58842-445-32114 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,388 | Feb 16, 2006 | — | — |
| Prentice Northeast Unit #80242-445-32115 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,303 | Feb 16, 2006 | — | — |
| Prentice Northeast Unit #52042-445-32117 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | PluggedOil | 7,400 | Feb 16, 2006 | — | — |
| Mathews 90 #1HZ42-195-31457 | Highmark Energy Operating LLC | Hansford, TXHansford (Morrow Lower) | Temporarily abandonedGas | 7,850 | Feb 8, 2006 | — | — |
| Prentice Northeast Unit #73142-445-32113 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,386 | Feb 8, 2006 | — | — |
| Minium 734 #3HHZ42-295-32987 | Highmark Energy Operating LLC | Lipscomb, TXPeery (Cleveland) | PluggedOil | 9,000 | Jan 20, 2006 | — | — |
| Reynolds 25 #242-483-32011 | Highmark Energy Operating LLC | Wheeler, TXP.C.X. (Granite Wash) | Temporarily abandonedGas | 14,630 | Dec 29, 2005 | — | — |
| Brillhart 820 #6HHZ42-295-32966 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,331 | Dec 22, 2005 | — | — |
| Brillhart 818 #6HHZ42-295-32955 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,387 | Dec 16, 2005 | — | — |
| Schultz Brothers D #6HHZ42-295-32957 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,791 | Dec 8, 2005 | — | — |
| Shell-Perkins #1042-003-39715 | Highmark Energy Operating LLC | Andrews, TXDeep Rock (Penn.) | ActiveOil | 9,400 | Dec 5, 2005 | — | — |
| Price Willis D. #12H42-295-32961 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,868 | Nov 18, 2005 | — | — |
| Price Willis D. #11H42-295-32958 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,900 | Nov 16, 2005 | — | — |
| Pearl Wheat 764 #9HHZ42-295-32946 | Highmark Energy Operating LLC | Lipscomb, TXPeery (Cleveland) | ActiveOil | 7,436 | Nov 14, 2005 | — | — |
| Cooper 348 #1HHZ42-295-32950 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | PluggedOil | 9,000 | Nov 1, 2005 | — | — |
| Reba N Miller #4HHZ42-295-32944 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,955 | Oct 14, 2005 | — | — |
| Glass 16 #142-335-34529 | Highmark Energy Operating LLC | Mitchell, TXA & S (Miss.) | Shut inOil | 8,050 | Oct 10, 2005 | — | — |
| Price Willis D. #742-295-32766 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Atoka) | ActiveGas | 9,750 | Oct 7, 2005 | — | — |
| Pearl Wheat 764 #7HHZ42-295-32939 | Highmark Energy Operating LLC | Lipscomb, TXPeery (Cleveland) | ActiveOil | 7,353 | Oct 6, 2005 | — | — |
| Pearl Wheat 764 #8HHZ42-295-32940 | Highmark Energy Operating LLC | Lipscomb, TXPeery (Cleveland) | ActiveOil | 7,405 | Oct 6, 2005 | — | — |
| Schultz 696 #442-295-32937 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Atoka 9200) | ActiveGas | 9,342 | Oct 4, 2005 | — | — |
| Brillhart 820 #5HHZ42-295-32925 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,297 | Aug 18, 2005 | — | — |
| Schultz William #2HZ42-295-32922 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,723 | Aug 15, 2005 | — | — |
| Doyle J.B. #4HZ42-295-32923 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,805 | Aug 15, 2005 | — | — |
| Trosper Corwin 431 #3HHZ42-295-32909 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveOil | 8,033 | Jul 18, 2005 | — | — |
| Dobbins C. L. #942-339-31064 | Highmark Energy Operating LLC | Montgomery, TXConroe (Cons. L) | Temporarily abandonedGas | 4,013 | Jul 18, 2005 | — | — |
| Schultz Brothers D #5HZ42-295-32904 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 1,754 | Jun 29, 2005 | — | — |
| Prentice Northeast Unit #16042-445-31180 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 7,450 | Jun 29, 2005 | — | — |
| Pearl Wheat 764 #6HHZ42-295-32893 | Highmark Energy Operating LLC | Lipscomb, TXPeery (Cleveland) | Shut inOil | 7,341 | Jun 14, 2005 | — | — |
| Schultz Bros. -E- #5HZ42-295-32874 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,533 | Jun 6, 2005 | — | — |
| Fairway/James Lime/Unit #646242-213-30021 | Highmark Energy Operating LLC | Henderson, TXFairway (James Lime) | ActiveGas | 10,093 | May 31, 2005 | — | — |
| Fairway /James Lime/ Unit #549542-213-30024 | Highmark Energy Operating LLC | Henderson, TXFairway (James Lime) | PluggedOil | 10,100 | May 31, 2005 | — | — |
| Fairway /James Lime/ Unit #645242-213-30026 | Highmark Energy Operating LLC | Henderson, TXFairway (James Lime) | PluggedOil | 10,125 | May 27, 2005 | — | — |
| Fairway/James Lime/Unit #544242-213-30027 | Highmark Energy Operating LLC | Henderson, TXFairway (James Lime) | PluggedGas | 10,150 | May 27, 2005 | — | — |
| Fairway/James Lime/Unit #744242-213-30771 | Highmark Energy Operating LLC | Henderson, TXFairway (James Lime) | ActiveGas | 10,165 | May 27, 2005 | — | — |