| Koop G-2-258520 | Columbus Energy, LLC | Westhoff (Combined Associated) | 1 | 14.8K | 459K | Oct 2010 – Jul 2018 |
| Bures G-2-250099 | Viper S.W.D., LLC | Ganado (Frio 4-D) | 1 | 14.8K | 76.7K | Apr 2009 – Nov 2023 |
| Schuech Unit 8 O-2-8535 | Cibolo Energy Operating, Inc. | West Ranch (Frio 6840) | 1 | 14.6K | 11.2K | May 2000 – Dec 2004 |
| Babb G/U O-2-8394 | Chevron Midcontinent, L.P. | El Toro Max, W. (EY-2) | 1 | 14.6K | 195K | Jul 1998 – Aug 2001 |
| West Ranch Unit No. 1 O-2-9200 | Hilcorp Energy Company | West Ranch (Frio 6700) | 1 | 14.4K | 28.3K | Jun 2008 – Jun 2015 |
| Tittizer G-2-141510 | Marquee Corporation | Toro Grande, N.E. (9300 Sd.) | 1 | 14.3K | 2.28M | by Jan 1993 – Jan 2014 |
| G.T. Brooking O-2-9034 | Bull Operating, LLC | Swan Lake (6135) | 1 | 14.1K | 24.5K | Oct 2003 – Jan 2008 |
| Gerald G-2-224841 | Sandel Operating Company | Brushy Creek (Wilcox Cons.) | 1 | 14.1K | 441K | Oct 2006 – Aug 2026 |
| Kramer-Glaser O-2-9022 | Ffa Petroleum Services, Inc. | Little Kentucky (Frio 6630) | 1 | 13.9K | 18.4K | Sep 2005 – Apr 2012 |
| Vincik, A.R. O-2-8869 | Howard Exploration, Inc. | Bennview, E. (6450 Frio) | 1 | 13.9K | 375 | Feb 2004 – Aug 2011 |
| Matcek O-2-6449 | Pegasus Operating, Inc. | Mayo (5940) | 1 | 13.9K | 913 | by Jan 1993 – Jul 2000 |
| Matcek O-2-7044 | Pegasus Operating, Inc. | Mayo (5800) | 2 | 13.7K | 884 | by Jan 1993 – Jan 2001 |
| Appling G-2-216627 | Progenies Operating LLC | Appling Deep (Frio) | 1 | 13.4K | 204K | Jul 2005 – Oct 2015 |
| Mauritz, T.N. O-2-8047 | Union Oil Company of California | Ganado, West (5900) | 1 | 13.3K | 29.5K | Jan 1995 – Mar 1996 |
| Vincik -A- O-2-5508 | United Operating, LLC | Bennview, E. (6400 Frio) | 1 | 13.1K | 3.89K | by Jan 1993 – Mar 2007 |
| Ashley Ann O-2-10178 | Hilcorp Energy Company | West Ranch (Frio 6200) | 1 | 13K | 34.8K | Sep 2011 – Jul 2013 |
| Branch, Maggie O-2-4274 | KD Energy, LLC | Ganado (F- 4-A) | 1 | 12.9K | 45.1K | Jun 1998 – Mar 2005 |
| Weed, J.F. G-2-153972 | Texas Independent Explor., Inc. | Francitas, South ( F-25) | 1 | 12.9K | 658K | Mar 1995 – Dec 1996 |
| Stanford O-2-9179 | Viper S.W.D., LLC | Westhoff (Combined Associated) | 1 | 12.8K | 27.4K | Mar 2008 – Feb 2018 |
| Kallus - Volkmer G-2-150138 | CHP Oil & Gas Company, L.C. | Jack Starr (Yegua Y-4) | 1 | 12.6K | 1.61M | Jun 1994 – Dec 1996 |
| Scherer G-2-150516 | United Oil & Minerals, Inc. | OJ (Yegua) | 1 | 12.5K | 1.22M | Jun 1994 – Jun 2000 |
| Schuech Unit No. 1 O-2-8111 | Century Assets Corporation | West Ranch (Frio 7400) | 1 | 12.5K | 56K | Oct 1995 – Jun 1998 |
| Janica G-2-148292 | Sue-Ann Operating, L.C. | Ganado, South (Frio 6520) | 1 | 12.5K | 488K | Dec 1993 – Feb 2003 |
| Anders O-2-9195 | Marquee Corporation | El Torito (Yegua 7957) | 1 | 12.3K | 27.5K | Nov 2007 – Jul 2013 |
| Drushel "A" O-2-7743 | P&B Petroleum LLC | Cordele (M-3) | 1 | 12.2K | 9.3K | by Jan 1993 – Jan 2023 |
| Westhoff, A. E. G-2-196683 | Projj Energy LLC | Westhoff (Combined Associated) | 1 | 12.2K | 259K | May 2003 – Jun 2023 |
| Mauritz, T. N. O-2-8203 | Union Oil Company of California | Ganado, West (5400 Zone) | 2 | 12.2K | 17.4K | Jul 1996 – Jul 1997 |
| Kallus O-2-9166 | Encon Services, Inc. | Westhoff (Combined Associated) | 1 | 12K | 11.9K | Apr 2007 – Oct 2009 |
| Hood, Glenn and Nelda G-2-212124 | Manti Operating Company | Glen & Nelda (1ST Mass Wilcox) | 1 | 11.9K | 196K | Feb 2005 – Aug 2008 |
| Venglar, Leonard C. O-2-5720 | Engelke, R. H. | La Salle | 2 | 11.8K | 4.94K | by Jan 1993 – Mar 1997 |
| Toney, T. E. O-2-7183 | Phere Operating Inc | West Ranch (Toney) | 1 | 11.7K | 17.5K | by Jan 1993 – Apr 2013 |
| West Ranch -A- O-2-6274 | Hilcorp Energy Company | West Ranch (Dixon Sand) | 9 | 11.7K | 11.4K | Oct 1993 – Apr 2015 |
| Pressly, Edmonia, Estate O-2-2384 | Cordele Development Corporation | Cordele, SE. (2700 Sand) | 4 | 11.6K | 16 | Feb 1993 – Nov 2016 |
| Schuech, Irma "B" O-2-7801 | Engelke, R. H. | West Ranch (Frio 6200) | 1 | 11.6K | 16.9K | by Jan 1993 – Oct 1994 |
| McCrory G-2-123162 | Mamerow Energy Corp | Ganado (Frio 6620) | 1 | 11.4K | 453K | by Jan 1993 – Nov 2001 |
| Stafford O-2-7590 | Hanson Production Company | Miller (Yegua 8850 Sand) | 1 | 11.3K | 40.2K | by Jan 1993 – Apr 1995 |
| Weed, J. F. G-2-161434 | Texas Independent Explor Ltd. | Francitas, South ( 9,850) | 1 | 11.3K | 933K | Jan 1997 – Jan 2004 |
| Simons, T. K. O-2-4964 | Sequoia Fossil Fuels, Inc. | Texana, N. (Frio 6140) | 2 | 11.2K | 8.24K | Mar 1995 – Sep 1997 |
| Rose & Sample Gas Unit G-2-157780 | Scana Petroleum Resources, Inc. | El Torito, W. (8100 Sd.) | 1 | 11.1K | 383K | Jan 1996 – Nov 1996 |
| Drexel -A- O-2-4433 | Kristen Oil and Gas, Inc. | Francitas (Frio 7030) | 1 | 11K | 294 | by Jan 1993 – Apr 2026 |
| Vincik, A.R. O-2-8518 | Wynn-Crosby Energy, Inc. | Bennview, E. (6450 Frio) | 1 | 11K | 8.05K | Feb 2000 – Apr 2003 |
| Hicks Gas Unit 1 G-2-154854 | Ken Petroleum Corporation | Toro Grande (FB-a, 8100 Yegua) | 1 | 11K | 852K | Mar 1995 – May 2000 |
| Branch, Maggie O-2-499 | KD Energy, LLC | Ganado, Deep | 2 | 10.9K | 9.06K | by Jan 1993 – Nov 2010 |
| Hamons, Dan O-2-3418 | Angel Operating LLC | Ganado, West (4700 Zone) | 2 | 10.9K | 22.5K | by Jan 1993 – Feb 1995 |
| Pearson O-2-7872 | American Int'l Energy Corp. | La Ward, NE. (5670) | 1 | 10.9K | 3.5K | Apr 1993 – Mar 1998 |
| Mauritz-Spacek O-2-11851 | Angel Operating LLC | Ganado, West (4700 Zone) | 1 | 10.9K | 11.1K | Nov 2018 – Sep 2019 |
| Staford G-2-144293 | Anadarko Petroleum Corporation | Wayside Chapel (Yegua) | 1 | 10.8K | 1.38M | Jun 1993 – Oct 1997 |
| Westhoff, W. T. G-2-123862 | Ffa Petroleum Services | Texana, North (Frio 6090) | 1 | 10.8K | 73.7K | Sep 1994 – Dec 1996 |
| Ross, Hanna O-2-7693 | Shell Western E&P Inc. | Ganado (F- 4-A) | 1 | 10.8K | 20.8K | by Jan 1993 – Dec 1994 |
| Sartwelle G-2-202720 | Brigham Oil & Gas, L.P. | Eagle Nest (Frio) | 1 | 10.8K | 1.12M | Feb 2004 – Jan 2007 |