| Columbus Field Unit O-3-22022 | Mitchell Energy Company L.P. only | Columbus ( 6-a Wilcox) | Colorado | 1 | 3.8K | 34.9K | Mar 1993 – Jun 1995 |
| Zachary, H.B. -C- G-4-66598 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 3.79K | 788K | by Jan 1993 – Jul 2016 |
| Oden 13-181 G-10-252927 | Crescent Energy Operating, LLC only | Bush (Permian) | Reeves | 1 | 3.75K | 3.23M | Sep 2009 – Dec 2025 |
| Hachar, D.D. G-4-137367 | Columbus Energy, LLC only | Clark Ranch (Lobo) | Webb | 1 | 3.74K | 2.68M | by Jan 1993 – Aug 2024 |
| McKendrick, W.H. G-4-146980 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 3.65K | 401K | Sep 1993 – May 1996 |
| Martinez, D. G-4-170537 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 3.62K | 791K | Aug 1998 – Jan 2020 |
| Alexander, Charles G-4-191817 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 3.6K | 2.16M | Sep 2002 – Mar 2021 |
| Benavides Tract 4 G-4-74781 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 3.6K | 1.32M | by Jan 1993 – Sep 2016 |
| Bush O-1-16568 | Jack Operating only | Minerva-Rockdale | Milam | 2 | 3.6K | 0 | May 2012 – Jan 2023 |
| Settle G-13-254345 | BKV Barnett, LLC only | Barnabus (Mississippian) | Cooke | 1 | 3.54K | 32.5K | Jan 2010 – May 2016 |
| Laredo Townsite "a" Unit G-4-164794 | Columbus Energy, LLC only | Huerfano (Lobo 1) | Webb | 1 | 3.48K | 1.42M | Oct 1996 – Aug 2016 |
| Akin-McKendrick G-4-74961 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 3.46K | 617K | by Jan 1993 – Mar 2013 |
| William Hubberd "C1" G-4-191700 | Columbus Energy, LLC only | Liz (9200) | Webb | 1 | 3.46K | 2.54M | Jul 2002 – Aug 2026 |
| B.M.T. G-4-162560 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 3.45K | 1.1M | Apr 1997 – Aug 2026 |
| Varibus G-5-136459 | Hilcorp Energy Company only | Bear Grass (Travis Peak) | Leon | 1 | 3.44K | 2.61M | by Jan 1993 – Aug 2026 |
| University "J" O-10-29298 | R3 Operating Corporation only | Buster (Bend Conglomerate) | Crane | 1 | 3.43K | 43.2K | by Jan 1993 – Aug 1996 |
| Vick -A- O-10-23739 | Bustos, Martin Oil only | Wentz (Clear Fork) | Pecos | 4 | 3.41K | 21 | by Jan 1993 – Nov 1995 |
| Busbee O-8-14272 | Mer Resources only | Brown County Regular | Brown | 16 | 3.39K | 1.18K | by Jan 1993 – Dec 2012 |
| Alexander, Charles A. G-4-75728 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 3.36K | 1.01M | by Jan 1993 – Sep 2017 |
| Columbus Field Unit G-3-40541 | Rusk Energy Operating LLC only | Columbus (Consolidated) | Colorado | 1 | 3.35K | 188K | by Jan 1993 – Nov 2020 |
| COG Malakoff-Peterson "A" G-4-135957 | Columbus Energy, LLC only | San Idelfonso (Lobo) | Webb | 1 | 3.35K | 1.62M | by Jan 1993 – Aug 2026 |
| Hastedt, Emma G-3-46146 | Hilcorp Energy Company only | Columbus (11-F) | Colorado | 1 | 3.34K | 413K | by Jan 1993 – Nov 1997 |
| Forbus Estate Gas Unit G-6-150017 | Rockcliff Energy Operating LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 3.33K | 1.61M | May 1994 – May 2018 |
| B.M.T. G-4-174085 | Columbus Energy, LLC only | Clark Ranch (Lobo) | Webb | 1 | 3.32K | 985K | Aug 1999 – Aug 2026 |
| C.D.U. G-4-152247 | Columbus Energy, LLC only | San Idelfonso (Lobo) | Webb | 1 | 3.3K | 806K | Dec 1994 – Sep 2019 |
| Forbus Estate Gas Unit G-6-152719 | TGNR East Texas II LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 3.29K | 2.49M | Dec 1994 – Aug 2026 |
| Hachar G-4-190001 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 3.29K | 1.12M | May 2002 – Aug 2025 |
| Hubberd, William C 3 G-4-152918 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 3.25K | 160K | Jan 1995 – Sep 2001 |
| Bussey O-13-33468 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 3.25K | 170K | Jul 2014 – Feb 2019 |
| Ford, Buster G-8-152833 | Texxol Operating Company, Inc. only | Brazos Grogan (Atoka Bend) | Palo Pinto | 1 | 3.22K | 49.7K | Jun 1994 – Dec 2014 |
| Wright, L. A. Unit G-4-118011 | Columbus Energy, LLC only | Aguas Calientes (Lobo 1) | Webb | 1 | 3.17K | 1.25M | by Jan 1993 – Feb 2015 |
| McLemore "218" G-8-168424 | Amerac Energy Corporation only | Big Bussy (Caddo, Upper) | Shackelford | 1 | 3.14K | 19.3K | May 1998 – Sep 1999 |
| Hubberd, William "C1" G-4-142533 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 3.14K | 3.54M | by Jan 1993 – Aug 2026 |
| Hastedt, Emma "B" G-3-160233 | Quintana Pet. Corp. only | Columbus (12-F) | Colorado | 1 | 3.11K | 81.5K | Sep 1996 – Oct 1997 |
| Acevedo-Haering G-4-157711 | Columbus Energy, LLC only | Volz (Lobo) | Webb | 1 | 3.11K | 669K | Mar 1996 – Jun 2016 |
| Hubberd, William "D3" G-4-189986 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 3.11K | 1.51M | Apr 2002 – Aug 2026 |
| Forbus Estate Gas Unit G-6-90390 | TGNR East Texas II LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 3.1K | 1.97M | by Jan 1993 – Jan 2022 |
| Columbus Field Unit G-3-162908 | Rusk Energy Operating LLC only | Columbus (Consolidated) | Colorado | 1 | 3.1K | 678K | Apr 1997 – Nov 2020 |
| Hubberd, William D3 G-4-154127 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 3.07K | 659K | Feb 1995 – Mar 2002 |
| Rancho Blanco G-4-183050 | Columbus Energy, LLC only | Rancho Blanco (Lobo) | Webb | 1 | 3.05K | 1.57M | Apr 2001 – Aug 2026 |
| Denton-Albus O-13-24207 | Bitter Creek Petroleum Co. only | Bobby B (Tann) | Knox | 3 | 3.04K | 1.4K | by Jan 1993 – Feb 1998 |
| Alexander, Charles C G-4-196413 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 3.03K | 130K | Jul 2003 – Nov 2015 |
| Columbus Field Unit G-3-162283 | Rusk Energy Operating LLC only | Columbus (Consolidated) | Colorado | 1 | 2.97K | 267K | Feb 1997 – Sep 2005 |
| Columbus Field Unit G-3-129343 | Mitchell Energy Corporation only | Columbus (11-D & 11-F-S) | Colorado | 1 | 2.95K | 140K | Jun 1993 – May 2000 |
| Arco O-9-5662 | Bustos, Martin Oil only | C-M-R (Grayburg) | Upton | 6 | 2.94K | 13 | by Jan 1993 – Feb 2011 |
| Malakoff - Peterson "A" G-4-135213 | Columbus Energy, LLC only | Schwarz (Lobo 6) | Webb | 1 | 2.88K | 1.17M | by Jan 1993 – May 2002 |
| Lindholm GU 86 G-1-221358 | Columbus Energy, LLC only | Rhode (7300) | McMullen | 1 | 2.87K | 207K | Apr 2006 – Oct 2007 |
| Bernardo Bustamante G. U. G-4-216033 | Killam Oil Co., Ltd. only | Jennings (Wilcox Consolidated) | Zapata | 1 | 2.87K | 539K | Jul 2005 – Jan 2007 |
| COG Malakoff - Peterson "A" G-4-125837 | Columbus Energy, LLC only | San Idelfonso (Lobo) | Webb | 1 | 2.87K | 1.1M | by Jan 1993 – Aug 2026 |
| Oryx G-4-204954 | Columbus Energy, LLC only | Govt. Wells, N. (1ST Reagan) | Duval | 1 | 2.86K | 496K | Oct 2004 – Aug 2019 |