| 650473 | Jan 14, 2008 | Jan 14, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Wilson Duke 171 #1743538795 | 8,975 |
| 650415 | Jan 14, 2008 | Jan 14, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Wilson Duke 171 #2343538788 | 8,750 |
| 650410 | Jan 14, 2008 | Jan 14, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Wilson Duke 171 #2243538787 | 8,900 |
| 650409 | Jan 14, 2008 | Jan 14, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Wilson Duke 171 #2143538786 | 8,900 |
| 650408 | Jan 14, 2008 | Jan 14, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Wilson Duke 171 #2043538785 | 8,975 |
| 650407 | Jan 14, 2008 | Jan 14, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Wilson Duke 171 #1943538784 | 8,650 |
| 650402 | Jan 14, 2008 | Jan 14, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Wilson Duke 171 #1843538783 | 8,800 |
| 652277 | Jan 11, 2008 | Jan 11, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Vanderstucken, Joe M. #1543538830 | 8,950 |
| 652146 | Jan 10, 2008 | Jan 10, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Ward 114 #2443538826 | 9,250 |
| 652316 | Jan 9, 2008 | Jan 9, 2008 | Highmount Expl & Prod Texas LLC | Schleicher | University 54-24 #441332501 | 8,650 |
| 652260 | Jan 9, 2008 | Jan 9, 2008 | Highmount Expl & Prod Texas LLC | Crockett | University 56 22 #1110540510 | 8,950 |
| 652250 | Jan 9, 2008 | Jan 9, 2008 | Highmount Expl & Prod Texas LLC | Schleicher | Mayer Edwin S Jr N #1141332500 | 8,900 |
| 652192 | Jan 9, 2008 | Jan 9, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Hill-Mayer, Edwin S. Jr. "J" #843538829 | 8,350 |
| 652189 | Jan 9, 2008 | Jan 9, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Hill-Mayer, Edwin S. Jr "J" #743538828 | 8,200 |
| 652187 | Jan 9, 2008 | Jan 9, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Hill-Mayer, Edwins S. Jr "J" #643538827 | 8,200 |
| 651996 | Jan 8, 2008 | Jan 8, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Mayfield 46 #2543538832 | 8,600 |
| 650795 | Jan 8, 2008 | Jan 8, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Wilson Duke 189 #2843538801 | 9,250 |
| 650792 | Jan 8, 2008 | Jan 8, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Wilson Duke 189 #2643538802 | 9,250 |
| 650790 | Jan 8, 2008 | Jan 8, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Wilson Duke 189 #2443538798 | 9,250 |
| 650788 | Jan 8, 2008 | Jan 8, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Wilson Duke 189 #2243538799 | 9,250 |
| 650786 | Jan 8, 2008 | Jan 8, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Wilson Duke 189 #2143538797 | 9,250 |
| 650785 | Jan 8, 2008 | Jan 8, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Wilson Duke 189 #1943538796 | 9,250 |
| 650264 | Jan 8, 2008 | Jan 8, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Canyon Ranch 207 #21S43538781 | 7,250 |
| 650256 | Jan 8, 2008 | Jan 8, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Canyon Ranch 207 #19S43538789 | 7,250 |
| 650252 | Jan 7, 2008 | Jan 7, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Canyon Ranch 207 #18S43538779 | 7,250 |
| 650243 | Jan 4, 2008 | Jan 4, 2008 | Highmount Expl & Prod Texas LLC | Edwards | Canyon Ranch #1068E13731939 | 6,950 |
| 651975 | Jan 3, 2008 | Jan 3, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Whitehead 6 #643538824 | 9,450 |
| 651865 | Jan 2, 2008 | Jan 2, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Richardson 6 #943538816 | 8,600 |
| 651822 | Jan 2, 2008 | Jan 2, 2008 | Highmount Expl & Prod Texas LLC | Sutton | Mayfield 45 #2243538814 | 8,650 |
| 648878Amendment | Dec 28, 2007 | Dec 28, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Mayer Ranch 36 #343538753 | 8,700 |
| 649758 | Dec 27, 2007 | Dec 27, 2007 | Highmount Expl & Prod Texas LLC | Schleicher | Parmer 30 #341332492 | 8,900 |
| 649585 | Dec 27, 2007 | Dec 27, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Shurley RR 2A #843539336 | 8,450 |
| 649582 | Dec 27, 2007 | Dec 27, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Shurley RR 2A #743538772 | 9,300 |
| 650157 | Dec 21, 2007 | Dec 21, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Mayfield 33 #2443538777 | 8,850 |
| 651562 | Dec 20, 2007 | Dec 20, 2007 | Highmount Expl & Prod Texas LLC | Schleicher | Evans 120 #341332498 | 7,400 |
| 651559 | Dec 20, 2007 | Dec 20, 2007 | Highmount Expl & Prod Texas LLC | Schleicher | Evans 120 #141332499 | 7,400 |
| 651544 | Dec 20, 2007 | Dec 20, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Mittel RH #1143538812 | 7,400 |
| 649590 | Dec 20, 2007 | Dec 20, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Shurley RR 2A #943538774 | 8,475 |
| 650513 | Dec 19, 2007 | Dec 19, 2007 | Highmount Expl & Prod Texas LLC | Edwards | Canyon Ranch 107 #14E13731936 | 6,950 |
| 650964 | Dec 17, 2007 | Dec 17, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Canyon Ranch #1272S43538805 | 6,950 |
| 650729 | Dec 17, 2007 | Dec 17, 2007 | Highmount Expl & Prod Texas LLC | Schleicher | Meador 57 #341332496 | 8,250 |
| 650727 | Dec 17, 2007 | Dec 17, 2007 | Highmount Expl & Prod Texas LLC | Schleicher | Clark 58 #541332495 | 8,250 |
| 651029 | Dec 15, 2007 | Dec 15, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Stewart 78 1/2 #543538811 | 5,950 |
| 650926 | Dec 13, 2007 | Dec 13, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Canyon Ranch 115 #25S43538803 | 7,000 |
| 650918 | Dec 13, 2007 | Dec 13, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Canyon Ranch 105 #17S43538806 | 7,250 |
| 650918Amendment | Dec 13, 2007 | Dec 13, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Canyon Ranch 105 #17S43538806 | 7,250 |
| 650235 | Dec 13, 2007 | Dec 13, 2007 | Highmount Expl & Prod Texas LLC | Edwards | Canyon Ranch #1069E13731933 | 6,950 |
| 649334 | Dec 13, 2007 | Dec 13, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Mayer Ranch 40 #343538808 | 8,550 |
| 649332 | Dec 13, 2007 | Dec 13, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Mayer Ranch 40 #243538809 | 8,550 |
| 649331 | Dec 13, 2007 | Dec 13, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Mayer Ranch 40 #143538810 | 8,575 |
| 643748Amendment | Dec 13, 2007 | Dec 13, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Mayer Ranch 36 #143538641 | 8,675 |
| 650262 | Dec 12, 2007 | Dec 12, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Canyon Ranch #39S43538780 | 5,950 |
| 650260 | Dec 12, 2007 | Dec 12, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Canyon Ranch 207 #20S43538782 | 7,250 |
| 650247 | Dec 12, 2007 | Dec 12, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Canyon Ranch #116S43538807 | 5,950 |
| 650206 | Dec 12, 2007 | Dec 12, 2007 | Highmount Expl & Prod Texas LLC | Schleicher | Ryan #220241332494 | 8,800 |
| 650159 | Dec 12, 2007 | Dec 12, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Mayfield 32 #2143538778 | 8,975 |
| 648975 | Dec 12, 2007 | Dec 12, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Shurley 139 #543538756 | 7,175 |
| 650723 | Dec 11, 2007 | Dec 11, 2007 | Highmount Expl & Prod Texas LLC | Schleicher | Clark 58 #441332497 | 8,250 |
| 649204Amendment | Nov 16, 2007 | Nov 16, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Simmons 73 #1143538760 | 8,250 |
| 649204Amendment | Nov 16, 2007 | Nov 16, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Simmons 73 #1143538760 | 8,250 |
| 648880Amendment | Nov 7, 2007 | Nov 7, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Mayer Ranch 40 #443538754 | 8,550 |
| 648459Amendment | Oct 31, 2007 | Oct 31, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Rimel #1143538748 | 9,575 |
| 643532Amendment | Sep 4, 2007 | Sep 4, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Shurley RR 1A #1643538639 | 9,050 |
| 643486Amendment | Sep 4, 2007 | Sep 4, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Shurley RR 1A #1143538635 | 8,975 |
| 643480Amendment | Sep 4, 2007 | Sep 4, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Shurley RR 1A #1043538634 | 8,850 |
| 644854Amendment | Aug 28, 2007 | Aug 28, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Mayer, Edwin S. Jr. "C" #10443538671 | 8,300 |
| 636794Amendment | May 29, 2007 | May 29, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Shurley 36 #1743538447 | 7,200 |
| 637969Amendment | May 10, 2007 | May 10, 2007 | Highmount Expl & Prod Texas LLC | Edwards | Canyon Ranch #1066E13731894 | 7,150 |
| 638147Amendment | May 9, 2007 | May 9, 2007 | Highmount Expl & Prod Texas LLC | Edwards | Canyon Ranch #906E13731897 | 7,250 |
| 637639Amendment | May 4, 2007 | May 4, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Shurley 165 #1743538472 | 8,850 |
| 635574Amendment | Mar 28, 2007 | Mar 28, 2007 | Highmount Expl & Prod Texas LLC | Edwards | Canyon Ranch 107 #12E13731879 | 7,350 |
| 632381Amendment | Jan 30, 2007 | Jan 30, 2007 | Highmount Expl & Prod Texas LLC | Sutton | Kelly 115 #2543538298 | 6,825 |
| 626652Amendment | Oct 26, 2006 | Oct 26, 2006 | Highmount Expl & Prod Texas LLC | Sutton | Mayer, Edwin S. Jr. #40443538163 | 8,350 |
| 626882Amendment | Oct 5, 2006 | Oct 5, 2006 | Highmount Expl & Prod Texas LLC | Sutton | Hill-Mayer "ZZ" #743538169 | 8,400 |
| 623713Amendment | Aug 7, 2006 | Aug 7, 2006 | Highmount Expl & Prod Texas LLC | Sutton | Ward, Rip "B" #10443538087 | 6,775 |
| 621829Amendment | Jun 30, 2006 | Jun 30, 2006 | Highmount Expl & Prod Texas LLC | Sutton | Canyon Ranch #2078S43538037 | 7,050 |
| 619362Amendment | May 17, 2006 | May 17, 2006 | Highmount Expl & Prod Texas LLC | Sutton | Shurley 96 #2443537986 | 6,650 |
| 613519Amendment | Feb 2, 2006 | Feb 2, 2006 | Highmount Expl & Prod Texas LLC | Sutton | Cauthorn 16 #543537828 | 7,250 |
| 606813Amendment | Sep 23, 2005 | Sep 23, 2005 | Highmount Expl & Prod Texas LLC | Sutton | Hill-Mayer, Edwin S. Jr. "P" #543537614 | 8,500 |
| 604835Amendment | Aug 11, 2005 | Aug 11, 2005 | Highmount Expl & Prod Texas LLC | Sutton | Hill-Mayer, Edwin S. Jr 'C' #543537567 | 8,400 |
| 559880Amendment | Apr 1, 2005 | Apr 1, 2005 | Highmount Expl & Prod Texas LLC | Sutton | Hill-Mayer, Edwin S. Jr. "Z" #643537377 | 8,150 |
| 532400Amendment | May 27, 2003 | May 27, 2003 | Highmount Expl & Prod Texas LLC | Sutton | Reed 116 #2043536363 | 6,550 |
| 531156Amendment | Apr 25, 2003 | Apr 25, 2003 | Highmount Expl & Prod Texas LLC | Sutton | Reed 116 #1943536309 | 6,600 |
| 407255Amendment | Dec 23, 1992 | Dec 23, 1992 | Highmount Expl & Prod Texas LLC | Sutton | Davis "D" #543533962 | 6,600 |