| McKendrick, Cookie G-4-197060 | Columbus Energy, LLC only | Vato (Lobo) | Webb | 1 | 1.3K | 430K | Aug 2003 – Apr 2012 |
| Armistead G-4-153162 | Columbus Energy, LLC only | Government Wells, N. (11500) | Duval | 1 | 1.3K | 1.58M | Feb 1995 – Nov 2010 |
| Brockenbush B O-1-11888 | Jet-Tex Oil & Gas, LLC only | Minerva-Rockdale | Milam | 3 | 1.27K | 113 | by Jan 1993 – Jul 2017 |
| McKendrick, W. H. G-4-202907 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 1.27K | 180K | Feb 2004 – Feb 2017 |
| Hubberd, William G-4-65203 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 1.26K | 352K | by Jan 1993 – Feb 2020 |
| Hubberd G-4-150833 | Columbus Energy, LLC only | Liz (9200) | Webb | 1 | 1.26K | 592K | Aug 1994 – Aug 2026 |
| Chamberlain-Gongora Unit G-4-150547 | Columbus Energy, LLC only | San Idelfonso (Lobo) | Webb | 1 | 1.24K | 547K | Jul 1994 – Jan 2009 |
| Brockenbush -A- O-1-12261 | Jet-Tex Oil & Gas, LLC only | Minerva-Rockdale | Milam | 1 | 1.23K | 112 | by Jan 1993 – Jul 2017 |
| Hubberd Trust G-4-153776 | Columbus Energy, LLC only | Liz (9200) | Webb | 1 | 1.23K | 873K | Mar 1995 – Jan 2010 |
| Martinez, D. S. G-4-186229 | Columbus Energy, LLC only | Blancas Creek (Lobo 6) | Webb | 1 | 1.21K | 476K | Aug 2001 – Aug 2026 |
| Camp Barkeley O-8-28211 | Bustamante Resources LLC only | Taylor County Regular | Taylor | 1 | 1.21K | 0 | Jan 1998 – Aug 2026 |
| Macmahon "A" G-4-208738 | Columbus Energy, LLC only | Volz (Lobo) | Webb | 1 | 1.2K | 501K | Nov 2004 – Jul 2024 |
| Cfu O-3-21392 | OXY USA Inc. only | Columbus ( 9-B) | Colorado | 1 | 1.2K | 2.21K | Mar 1993 – Sep 1993 |
| Busby Estate Gas Unit G-6-124654 | TGNR East Texas LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 1.2K | 928K | by Jan 1993 – Feb 2022 |
| Cross O-10-32893 | Bustamante Oil Company only | Harper | Ector | 1 | 1.19K | 20 | by Jan 1993 – Feb 2024 |
| McEntire G-10-106269 | Bustamante Oil Company only | McEntire (Fusselman) | Sterling | 1 | 1.18K | 210K | by Jan 1993 – Aug 2026 |
| Rancho Blanco G-4-205755 | Columbus Energy, LLC only | Rancho Blanco (Lobo) | Webb | 1 | 1.17K | 883K | Dec 2004 – Aug 2026 |
| Columbus Field Unit G-3-186919 | Devon Energy Operating Co., L.P. only | Columbus (Consolidated) | Colorado | 1 | 1.16K | 2.77K | Oct 2001 – May 2002 |
| Forbus Estate Gas Unit G-6-217110 | TGNR East Texas II LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 1.16K | 924K | Nov 2005 – Jun 2019 |
| Martin - Volz G-4-193938 | Columbus Energy, LLC only | Martin-Volz (Lobo) | Webb | 1 | 1.13K | 88.3K | Mar 2003 – Oct 2012 |
| Bayou Development B G-3-193911 | Columbus Energy, LLC only | Dickinson (Frio Cons.) | Galveston | 1 | 1.13K | 206K | Feb 2003 – May 2019 |
| Martinez, D.S. G-4-79099 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 1.12K | 619K | by Jan 1993 – Nov 2008 |
| Martinez, D. G-4-140559 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 1.12K | 719K | by Jan 1993 – Jul 1997 |
| Hubberd "E" G-4-162847 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 1.12K | 64.2K | Apr 1997 – Aug 2010 |
| Cullen, H. R. et Al G-3-129422 | Quintana Pet. Corp. only | Columbus (11-B) | Colorado | 1 | 1.12K | 38.4K | by Jan 1993 – Jun 1993 |
| Prevost G-4-59554 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 1.12K | 751K | by Jan 1993 – Aug 2026 |
| Brockenbush -B O-1-10554 | Jet-Tex Oil & Gas, LLC only | Minerva-Rockdale | Milam | 4 | 1.11K | 113 | by Jan 1993 – Jul 2017 |
| Marrs McLean Trust -C- G-4-155807 | Columbus Energy, LLC only | Thompsonville, NE. (12500) | Jim Hogg | 1 | 1.11K | 9.74M | Jun 1995 – Aug 2026 |
| Columbus Field Unit G-3-158731 | Mitchell Energy Corporation only | Columbus ( 7-E) | Colorado | 1 | 1.11K | 72.7K | Apr 1996 – Jul 1998 |
| Brockenbush O-1-5658 | Jet-Tex Oil & Gas, LLC only | Minerva-Rockdale | Milam | 3 | 1.1K | 113 | by Jan 1993 – Feb 2006 |
| Rancho Blanco G-4-193811 | Columbus Energy, LLC only | Rancho Blanco (Lobo) | Webb | 1 | 1.1K | 632K | Feb 2003 – Aug 2026 |
| Columbus Field Unit O-3-23649 | Mitchell Energy Company L.P. only | Columbus ( 5-G Wilcox) | Colorado | 1 | 1.08K | 7.87K | Jan 1999 – Oct 1999 |
| Bayou Development B G-3-204719 | Columbus Energy, LLC only | Dickinson (Frio Cons.) | Galveston | 1 | 1.08K | 91.8K | Mar 2004 – Sep 2018 |
| Alexander, Charles G-4-195590 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 1.07K | 1.38M | May 2003 – Aug 2026 |
| Noelke -J- O-9-1068 | Bustos, Martin Oil only | Noelke | Crockett | 4 | 1.07K | 13 | by Jan 1993 – Feb 1994 |
| Hubberd G-4-153746 | Columbus Energy, LLC only | Liz (9200) | Webb | 1 | 1.06K | 508K | Apr 1995 – Nov 1996 |
| Navidad River Unit G-2-234220 | Columbus Energy, LLC only | Westhoff (Combined Associated) | Jackson | 1 | 1.06K | 83.3K | Jan 2008 – Nov 2016 |
| Terry "A" G-9-276171 | Bustamante Resources LLC only | Jameson (Strawn) | Coke | 1 | 1.06K | 47.3K | Feb 2015 – Aug 2026 |
| Hastedt, Emma G-3-149767 | Quintana Pet. Corp. only | Columbus (11-A) | Colorado | 1 | 1.04K | 36.5K | Jun 1994 – Oct 1994 |
| Hachar, D.D. G-4-159502 | Columbus Energy, LLC only | Clark Ranch (Lobo) | Webb | 1 | 1.03K | 78.9K | Jul 1996 – Nov 2000 |
| Cordova O-9-7888 | Bustos, Martin Oil only | Rodman-Noel (Grayburg) | Upton | 1 | 1.01K | 21 | by Jan 1993 – Jan 2005 |
| Hachar, D.D. O-4-13418 | Columbus Energy, LLC only | Clark Ranch (Lobo) | Webb | 1 | 1.01K | 105K | Jun 2006 – Dec 2006 |
| Hubberd B G-4-165675 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 1K | 197K | Dec 1997 – Mar 2005 |
| Columbus Field Unit G-3-290228 | Rusk Energy Operating LLC only | Columbus (Consolidated) | Colorado | 1 | 988 | 144K | Nov 2020 – Aug 2024 |
| Rancho Blanco G-4-206083 | Columbus Energy, LLC only | Rancho Blanco (Lobo) | Webb | 1 | 978 | 663K | Dec 2004 – Oct 2020 |
| Busby Estate Gas Unit G-6-110172 | TGNR East Texas LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 976 | 991K | by Jan 1993 – Jan 2022 |
| Bayou Development B G-3-173201 | Columbus Energy, LLC only | Dickinson (Frio Cons.) | Galveston | 1 | 972 | 248K | Mar 1999 – May 2007 |
| Eckert 444 G-9-173855 | Bustamante Oil Company only | Baker Ranch (Canyon) | Irion | 1 | 958 | 45K | Jun 1999 – Feb 2024 |
| Clark, N. H. G-4-61924 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 958 | 243K | by Jan 1993 – Mar 2010 |
| Hubbard, William G-4-93206 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 955 | 235K | by Jan 1993 – Aug 2026 |