| Schultz Brothers D #4HZ42-295-32883 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,744 | May 11, 2005 | — | — |
| Brillhart 820 #4HHZ42-295-32882 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,320 | May 6, 2005 | — | — |
| Prentice Northeast Unit #28142-445-32091 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,427 | May 5, 2005 | — | — |
| Price Willis D. #1042-295-32879 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Atoka 9200) | ActiveGas | 9,800 | May 4, 2005 | — | — |
| Tregellas 675 #2 HHZ42-295-32867 | Highmark Energy Operating LLC | Lipscomb, TXPan Petro (Cleveland) | Shut inOil | 7,288 | Apr 13, 2005 | — | — |
| Price WD -B- #7HZ42-295-32863 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,725 | Apr 6, 2005 | — | — |
| Price WD -B- #8HZ42-295-32860 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,760 | Mar 30, 2005 | — | — |
| Brillhart 820 #3 HHZ42-295-32855 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveOil | 7,266 | Mar 23, 2005 | — | — |
| Schultz Brothers B #5HZ42-295-32853 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,761 | Mar 16, 2005 | — | — |
| Fairway/James Lime/Unit #448242-213-30025 | Highmark Energy Operating LLC | Henderson, TXFairway (James Lime) | ActiveGas | 9,959 | Mar 15, 2005 | — | — |
| Price WD -B- #6HZ42-295-32849 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,754 | Mar 4, 2005 | — | — |
| Fairway/James Lime/Unit #7523 HHZ42-001-32477 | Highmark Energy Operating LLC | Anderson, TXFairway (James Lime) | ActiveGas | 9,906 | Feb 28, 2005 | — | — |
| Fairway /James Lime/ Unit #7522HHZ42-001-32476 | Highmark Energy Operating LLC | Anderson, TXFairway (James Lime) | ActiveOil | 9,903 | Feb 25, 2005 | — | — |
| Price WD -B- #5HZ42-295-32843 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,750 | Feb 16, 2005 | — | — |
| Eldon 747 #2HHZ42-357-32494 | Highmark Energy Operating LLC | Ochiltree, TXPan Petro (Cleveland) | ActiveGas | 6,949 | Feb 3, 2005 | — | — |
| Bitler-Lowe Clearfork Unit #2042-003-39443 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,255 | Jan 31, 2005 | — | — |
| Bitler-Lowe Clearfork Unit #1942-003-39445 | Highmark Energy Operating LLC | Andrews, TXFullerton | ActiveOil | 7,281 | Jan 31, 2005 | — | — |
| Bitler-Lowe Clearfork Unit #1742-003-39446 | Highmark Energy Operating LLC | Andrews, TXFullerton | ActiveOil | 7,260 | Jan 31, 2005 | — | — |
| Bitler-Lowe Clearfork Unit #1842-003-39448 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,290 | Jan 31, 2005 | — | — |
| Bitler-Lowe Clearfork Unit #1542-003-39444 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,283 | Jan 24, 2005 | — | — |
| Bitler-Lowe Clearfork Unit #1642-003-39447 | Highmark Energy Operating LLC | Andrews, TXFullerton | ActiveOil | 7,272 | Jan 24, 2005 | — | — |
| Prentice Northeast Unit #842-445-00098 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveInjection | 7,375 | Jan 19, 2005 | — | — |
| Prentice Northeast Unit #30442-445-32074 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 7,402 | Jan 19, 2005 | — | — |
| Prentice Northeast Unit #30242-445-32075 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 7,345 | Jan 19, 2005 | — | — |
| Prentice Northeast Unit #48842-445-32076 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,322 | Jan 19, 2005 | — | — |
| Prentice Northeast Unit #51242-445-32077 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,390 | Jan 19, 2005 | — | — |
| Prentice Northeast Unit #53142-445-32078 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,430 | Jan 19, 2005 | — | — |
| Prentice Northeast Unit #53842-445-32079 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 7,502 | Jan 19, 2005 | — | — |
| Prentice Northeast Unit #55342-445-32080 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,335 | Jan 19, 2005 | — | — |
| Prentice Northeast Unit #56642-445-32081 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,440 | Jan 19, 2005 | — | — |
| Prentice Northeast Unit #69842-445-32083 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,395 | Jan 19, 2005 | — | — |
| Alexander O.L. #542-339-00577 | Highmark Energy Operating LLC | Montgomery, TXConroe | Shut inOil | 5,089 | Dec 10, 2004 | — | — |
| Prentice Northeast Unit #68542-445-32065 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,070 | Nov 18, 2004 | — | — |
| Prentice Northeast Unit #29442-445-32066 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 7,407 | Nov 18, 2004 | — | — |
| Doyle J.B. #6HZ42-295-32815 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,713 | Nov 16, 2004 | — | — |
| Leatherman 748 #5HHZ42-357-32480 | Highmark Energy Operating LLC | Ochiltree, TXDude Wilson (Cleveland) | ActiveGas | 7,010 | Nov 5, 2004 | — | — |
| Doyle J.B. #5HZ42-295-32812 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,672 | Oct 22, 2004 | — | — |
| Doyle J.B. #3HZ42-295-32811 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,782 | Oct 20, 2004 | — | — |
| University C #742-003-39320 | Highmark Energy Operating LLC | Andrews, TXShafter Lake (Yates) | PluggedOil | 3,400 | Aug 25, 2004 | — | — |
| Brillhart 819 #5HHZ42-295-32785 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,362 | Aug 18, 2004 | — | — |
| Moody E. #3242-339-30975 | Highmark Energy Operating LLC | Montgomery, TXConroe (Cons. U) | PluggedGas | 4,083 | Aug 6, 2004 | — | — |
| Brillhart 819 #4HZ42-295-32774 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,400 | Jun 21, 2004 | — | — |
| John Doyle Gas Unit #442-295-32765 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Morrow) | ActiveGas | 10,250 | Jun 14, 2004 | — | — |
| Doyle J.B. #2M42-295-32757 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Morrow) | ActiveGas | 10,250 | May 27, 2004 | — | — |
| Brillhart 819 #3HZ42-295-32772 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 7,413 | May 26, 2004 | — | — |
| Shafter Lake Clearfork Unit #5245W42-003-39249 | Highmark Energy Operating LLC | Andrews, TXShafter Lake (Clear Fork) | ActiveInjection | 6,995 | May 17, 2004 | — | — |
| Averitt #242-135-38633 | Highmark Energy Operating LLC | Ector, TXCowden South | PluggedOil | 4,900 | May 12, 2004 | — | — |
| Shafter Lake Clearfork Unit #5267W42-003-39239 | Highmark Energy Operating LLC | Andrews, TXShafter Lake (Clear Fork) | ActiveInjection | 6,998 | May 6, 2004 | — | — |
| Shafter Lake Clearfork Unit #5278W42-003-39240 | Highmark Energy Operating LLC | Andrews, TXShafter Lake (Clear Fork) | ActiveInjection | 7,000 | May 6, 2004 | — | — |
| Shafter Lake Clearfork Unit #405642-003-39241 | Highmark Energy Operating LLC | Andrews, TXShafter Lake (Clear Fork) | Shut inOil | 7,007 | May 6, 2004 | — | — |