| McLean, Marrs, Trust -A- G-4-14629 | Columbus Energy, LLC only | Thompsonville, NE (Wilcox 9500) | Jim Hogg | 1 | 647 | 4.4M | by Jan 1993 – Aug 2026 |
| Welder 385 G-4-210308 | Columbus Energy, LLC only | Seven Sisters, East ( 9500) | Duval | 1 | 645 | 810K | Apr 2005 – Aug 2026 |
| Columbus Field Unit O-3-22637 | Mitchell Energy Corporation only | Columbus (10-a, S.) | Colorado | 1 | 642 | 1.03K | Jan 1995 – Mar 1995 |
| Clark, N. H. G-4-215510 | Columbus Energy, LLC only | Clark Ranch (Lobo) | Webb | 1 | 640 | 364K | Dec 2005 – Feb 2017 |
| Forbus-McKinney G-6-242405 | Buckhorn Operating LLC only | Angie (James Lime) | San Augustine | 1 | 635 | 1.62M | Aug 2008 – Aug 2026 |
| Bussard-Cameron G-14-102774 | Upland Resources LLC only | Bussard (Morrow Upper) | Lipscomb | 1 | 606 | 2.68M | by Jan 1993 – Aug 2026 |
| Jann G-10-161407 | Bustamante Oil Company only | Big Salute, N. (Canyon) | Sterling | 1 | 602 | 61K | Dec 1996 – Aug 2026 |
| Busby Estate "a" Gas Unit G-6-102485 | TGNR East Texas LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 594 | 1.16M | by Jan 1993 – Aug 2026 |
| Holbein Gas Unit G-4-122983 | Columbus Energy, LLC only | Thompsonville, NE (Wilcox 9500) | Jim Hogg | 1 | 592 | 6.89M | by Jan 1993 – Aug 2026 |
| Hendry, M. C. O-9-21941 | Bustamante Resources LLC only | Jameson (Strawn) | Coke | 1 | 590 | 0 | Sep 2022 – Aug 2026 |
| Hubberd G-4-204088 | Columbus Energy, LLC only | Liz (8100) | Webb | 1 | 588 | 604K | Sep 2003 – Jan 2008 |
| McKendrick, W. H. G-4-154235 | Columbus Energy, LLC only | Hereford (Lobo) | Webb | 1 | 586 | 61.4K | Apr 1995 – Sep 1995 |
| Alexander, Charles G-4-191818 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 584 | 198K | Sep 2002 – Aug 2026 |
| Hubberd, William "B2" G-4-241991 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 578 | 164K | Jul 2008 – Aug 2026 |
| Cordova -D- O-9-1236 | Bustos, Martin Oil only | Rodman-Noel (Grayburg) | Upton | 2 | 575 | 7 | by Jan 1993 – Jul 2005 |
| Busby Estate "a" Gas Unit G-6-125214 | TGNR East Texas LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 574 | 1.53M | by Jan 1993 – Aug 2026 |
| Flores, L. G. G-4-153316 | Hilcorp Energy Company only | Bustamante (7950) | Zapata | 1 | 570 | 113K | Dec 1994 – Aug 2007 |
| Columbus Field Unit G-3-5791 | Mitchell Energy Corporation only | Columbus ( 7-E) | Colorado | 1 | 556 | 18.2K | Oct 1993 – Aug 1998 |
| Hachar, D. D. G-4-165380 | Columbus Energy Corp. only | Acevedo (Lobo 6) | Webb | 1 | 555 | 71.1K | Nov 1997 – Jan 2000 |
| Ploeger, Leslie G-2-178549 | Fowler Oil & Gas LLC only | Borchers Deep (Bushel) | Jackson | 1 | 537 | 9.83M | Jan 2000 – Aug 2026 |
| Columbus Field Unit G-3-55787 | Mitchell Energy Corporation only | Columbus ( 6-H) | Colorado | 1 | 526 | 75.6K | by Jan 1993 – Jan 1997 |
| Karon Unit G-2-63957 | Columbus Energy, LLC only | Karon (Luling) | Live Oak | 1 | 520 | 677K | by Jan 1993 – Aug 1998 |
| Shirley G-13-281105 | Lime Rock Resources IV-a, L.P. only | Barnabus (Mississippian) | Wise | 1 | 518 | 33.7K | Jul 2016 – Feb 2025 |
| Terry "B" G-9-212323 | Bustamante Resources LLC only | Jameson (Strawn) | Coke | 1 | 515 | 35.9K | Oct 2005 – Aug 2026 |
| Petree O-8-30591 | Bustamante Oil Company only | Taylor County Regular | Taylor | 1 | 512 | 0 | Nov 2010 – May 2021 |
| Hachar, D. D. G-4-243339 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 512 | 312K | Jul 2008 – Jan 2016 |
| Labus, T. G-2-203750 | Blackbrush O & G, Inc. only | Labus (Edwards, Upper) | Karnes | 1 | 499 | 506 | Jul 2004 – Jan 2005 |
| Cullen, H. R. et Al G-3-129423 | Quintana Pet. Corp. only | Columbus (9-C) | Colorado | 1 | 497 | 31K | by Jan 1993 – Apr 1994 |
| Hubberd G-4-154702 | Columbus Energy, LLC only | Liz (9200) | Webb | 1 | 491 | 291K | Jul 1995 – Jul 2013 |
| Hubberd G-4-212861 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 482 | 220K | Aug 2005 – Aug 2012 |
| Busby 3080 G-9-82038 | Meadco Properties only | Andrew A. (Canyon) | Irion | 1 | 478 | 150K | by Jan 1993 – Nov 2009 |
| Hachar G-4-189725 | Columbus Energy, LLC only | Laredo (Navarro) | Webb | 1 | 478 | 555K | Apr 2002 – Jan 2004 |
| Forman G-13-224164 | Lime Rock Resources IV-a, L.P. only | Barnabus (Mississippian) | Wise | 1 | 477 | 160K | Jun 2006 – Jul 2026 |
| Hubberd, Marie S. Trust G-4-166174 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 471 | 97K | Sep 1997 – Nov 2018 |
| Shelton, Busch "C" O-3-17741 | Otex Resources LLC only | Goose Creek | Harris | 1 | 471 | 2 | Nov 1993 – Aug 1999 |
| Bussard G-14-122216 | Beck Resources Incorporated only | Glazier (Morrow Upper) | Hemphill | 1 | 471 | 120K | by Jan 1993 – Dec 2012 |
| Busey, G. C. G-13-139268 | BKV Barnett, LLC only | Boonsville (Bend Congl., Gas) | Wise | 1 | 468 | 637K | by Jan 1993 – Aug 2026 |
| Humble Fee Gas Unit G-4-221133 | Columbus Energy, LLC only | Seven Sisters, E.(2ND Massive) | Duval | 1 | 462 | 112K | Mar 2006 – Sep 2008 |
| Alexander, Charles G-4-196929 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 461 | 75.9K | May 2003 – Sep 2015 |
| Gibson, Able O-10-33641 | Wagner & Brown, Ltd. only | Bush (Permian) | Reeves | 1 | 461 | 5.5K | by Jan 1993 – Mar 1993 |
| Busby Estate "a" Gas Unit G-6-109274 | TGNR East Texas LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 445 | 754K | by Jan 1993 – Aug 2026 |
| Forbus-McKinney G-6-242406 | Buckhorn Operating LLC only | Angie (James Lime) | San Augustine | 1 | 444 | 2.02M | Sep 2008 – Aug 2026 |
| Alexander, Charles G-4-194388 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 442 | 1.13M | Jan 2003 – Aug 2026 |
| Jann "A" G-10-161408 | Bustamante Oil Company only | Big Salute, N. (Canyon) | Sterling | 1 | 435 | 62.3K | Dec 1996 – Aug 2026 |
| Columbus Field Unit G-3-57591 | Mitchell Energy Corporation only | Columbus (6-B Wilcox) | Colorado | 1 | 407 | 51.2K | by Jan 1993 – Mar 1997 |
| McLean, Marrs G-4-14630 | Columbus Energy, LLC only | Thompsonville, NE (Wilcox 9500) | Jim Hogg | 1 | 406 | 5.68M | by Jan 1993 – Dec 2022 |
| Hachar, D.D. G-4-67563 | Columbus Energy, LLC only | Laredo (Navarro) | Webb | 1 | 400 | 782K | by Jan 1993 – Apr 2015 |
| Ervin G-4-147416 | Columbus Energy Corp. only | Rodriguez (Lobo 6) | Webb | 1 | 397 | 326K | Dec 1993 – Jan 1997 |
| Rancho Blanco G-4-100470 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 388 | 303K | Jun 1995 – Jul 2006 |
| Bayou Development B G-3-171774 | Columbus Energy, LLC only | Dickinson (Frio Cons.) | Galveston | 1 | 382 | 120K | Nov 1998 – Apr 1999 |