| Caldwell 8 #142-431-33154 | Burk Royalty Co. Ltd. only | SterlingW. A. M. (Wolfcamp) | ActiveOil | 7,775 | Sep 27, 2007 | 2 | Apr 2026 |
| Reynolds 32 #342-431-33148 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,850 | Jun 29, 2005 | 1 | Apr 2026 |
| Wilkinson 10 #542-431-33136 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,580 | Feb 16, 2005 | 1 | Apr 2026 |
| Wilkinson 3 #342-431-33134 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,560 | Feb 14, 2005 | 1 | Apr 2026 |
| McEntire 21 #642-431-33135 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveOil | 7,830 | Feb 14, 2005 | 1 | Apr 2026 |
| Wilkinson 9 #642-431-30063 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveOil | 7,567 | Jul 23, 2004 | 1 | Apr 2026 |
| Mc Entire 27 #642-431-33098 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,540 | Mar 15, 2004 | 1 | Apr 2026 |
| Wilkinson 9 #542-431-33080 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,550 | Oct 10, 2003 | 1 | Apr 2026 |
| McEntire 16 #5B42-431-33085 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveOil | 7,600 | Jan 6, 2003 | 1 | Apr 2026 |
| McEntire M. 19 #142-431-33048 | Atropos Exploration Company only | SterlingCredo E. (Cisco Up.) | ActiveOil | 8,920 | Jun 21, 2002 | 1 | Jan 2026 |
| McEntire 36 #442-431-33036 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveOil | 7,425 | Feb 6, 2002 | 1 | Apr 2026 |
| McEntire 36 #342-431-33029 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveOil | 7,422 | Nov 7, 2001 | 1 | Apr 2026 |
| McEntire 1 #442-431-33024 | Atropos Exploration Company only | SterlingCredo E. (Cisco Up.) | ActiveOil | 7,408 | Jul 20, 2001 | 1 | Apr 2026 |
| McEntire 36 #142-431-33025 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveOil | 7,375 | Jul 20, 2001 | 1 | Apr 2026 |
| Reynolds 30 #342-431-33016 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveOil | 7,960 | Apr 17, 2001 | 1 | Apr 2026 |
| McEntire 1 #342-431-33015 | Atropos Exploration Company only | SterlingCredo E. (Cisco Up.) | ActiveOil | 7,662 | Mar 23, 2001 | 1 | Apr 2026 |
| McEntire 35 #242-431-33012 | Siana Oil & Gas only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,470 | Mar 6, 2001 | 1 | Apr 2018 |
| McEntire 35 #342-431-33013 | Siana Oil & Gas only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,380 | Mar 6, 2001 | 1 | Apr 2018 |
| McEntire 26 #242-431-33011 | Siana Oil & Gas only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,440 | Feb 12, 2001 | 2 | Dec 2018 |
| Reynolds 30 #242-431-33009 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveOil | 7,950 | Feb 5, 2001 | 1 | Apr 2026 |
| Reynolds 29 #142-431-32898 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,830 | Jan 29, 2001 | 2 | Apr 2026 |
| Wilkinson 2 #20342-431-33007 | Steller Energy & Investment Corp only | SterlingCredo E. (Cisco Up.) | PluggedGas | 7,850 | Jan 19, 2001 | 1 | Apr 2011 |
| McEntire 1 #242-431-33006 | Atropos Exploration Company only | SterlingCredo E. (Cisco Up.) | ActiveOil | 7,595 | Jan 12, 2001 | 1 | Apr 2026 |
| S. McEntire 23 #342-431-33003 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,380 | Dec 1, 2000 | 1 | Apr 2026 |
| C. McEntire 23 #442-431-33001 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,418 | Oct 9, 2000 | 1 | Apr 2026 |
| Caldwell -26- #642-431-33000 | Bolding Energy LLC only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,300 | Oct 6, 2000 | 1 | Apr 2026 |
| Caldwell -26- #542-431-32995 | Bolding Energy LLC only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,420 | Aug 3, 2000 | 1 | Apr 2026 |
| Caldwell -26- #442-431-32976 | Bolding Energy LLC only | SterlingCredo E. (Cisco Up.) | ActiveOil | 7,400 | Oct 27, 1999 | 1 | Apr 2026 |
| Wilkinson 12 #242-431-32974 | Bolding Energy LLC only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,387 | Oct 15, 1999 | 1 | Apr 2026 |
| Caldwell -26- #342-431-32972 | Bolding Energy LLC only | SterlingCredo E. (Cisco Up.) | ActiveOil | 7,400 | Sep 17, 1999 | 1 | Apr 2026 |
| Wilkinson 14 #542-431-32970 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,440 | Sep 1, 1999 | 1 | Apr 2026 |
| Wilkinson 14 #442-431-32959 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,461 | May 5, 1999 | 1 | Apr 2026 |
| Wilkinson 14 #342-431-32954 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,497 | Oct 30, 1998 | 1 | Apr 2026 |
| Caldwell -26- #242-431-32953 | Bolding Energy LLC only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,306 | Oct 23, 1998 | 1 | Apr 2026 |
| Caldwell -26- #142-431-32946 | Bolding Energy LLC only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,350 | Sep 28, 1998 | 1 | Apr 2026 |
| Reynolds 32 #242-431-32945 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,809 | Sep 23, 1998 | 1 | Apr 2026 |
| Caldwell -25- #142-431-32926 | Bolding Energy LLC only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,402 | Mar 24, 1998 | 1 | Apr 2026 |
| Caldwell -23- #142-431-32897 | Bolding Energy LLC only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,750 | Mar 20, 1998 | 2 | Apr 2026 |
| McEntire 27 #742-431-32920 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,550 | Jan 23, 1998 | 1 | Apr 2026 |
| McEntire 23 #242-431-32916 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,422 | Jan 20, 1998 | 1 | Apr 2026 |
| Wilkinson -24- #542-431-32904 | Hamman Oil & Refining Company only | SterlingCredo E. (Cisco Up.) | PluggedGas | 8,000 | Nov 19, 1997 | 1 | Aug 2004 |
| Caldwell -23- #242-431-32902 | Bolding Energy LLC only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,750 | Nov 5, 1997 | 1 | Apr 2026 |
| McEntire 28 #742-431-32899 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,788 | Nov 3, 1997 | 1 | Apr 2026 |
| McEntire 28 #642-431-32900 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,820 | Nov 3, 1997 | 1 | Apr 2026 |
| McEntire 28 #842-431-32901 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,835 | Nov 3, 1997 | 1 | Apr 2026 |
| Wilkinson -24- #342-431-32892 | Hamman Oil & Refining Company only | SterlingCredo E. (Cisco Up.) | PluggedGas | 8,000 | Oct 7, 1997 | 1 | Sep 2004 |
| Wilkinson -24- #442-431-32891 | Bolding Energy LLC only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,750 | Sep 23, 1997 | 1 | Apr 2026 |
| McEntire 23 #142-431-32889 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,447 | Sep 3, 1997 | 1 | Apr 2026 |
| McEntire 22 #842-431-32888 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveGas | 7,430 | Aug 27, 1997 | 1 | Apr 2026 |
| Reynolds 30 #142-431-32882 | Atropos Production Corporation only | SterlingCredo E. (Cisco Up.) | ActiveOil | 7,950 | Jul 17, 1997 | 2 | Apr 2026 |