| Vaquillas 2059 G-4-141839 | Westport Oil and Gas Company, LP | Vaquillas Ranch (Lobo Cons.) | 1 | 14K | 1.54M | by Jan 1993 – Nov 1999 |
| Webb County School Board G-4-151286 | Faulconer, Vernon E., Inc. | Big Cowboy (Lobo) | 1 | 14K | 996K | Aug 1994 – Aug 2012 |
| Lechenger G-4-175694 | Hilcorp Energy Company | Benavides (Lobo Cons.) | 1 | 14K | 1.21M | Jan 2000 – Aug 2026 |
| Vaquillas Ranch E G-4-195642 | Hilcorp Energy Company | Vaquillas Ranch (Lobo Cons.) | 1 | 14K | 1.24M | Apr 2003 – Aug 2026 |
| Puig -C- O-4-3429 | Buck Management Co. L.L.C. | Aviators | 5 | 14K | 96 | by Jan 1993 – Mar 2001 |
| Galvan Ranch G-1-281187 | Caturus Energy, LLC | Briscoe Ranch (Eagleford) | 1 | 14K | 1.25M | Sep 2016 – Jan 2026 |
| Briscoe J GU3 State 34 G-1-280876 | SM Energy Company | Briscoe Ranch (Eagleford) | 1 | 14K | 4.02M | Nov 2015 – Aug 2026 |
| Vergara, G. B. G-4-165183 | Hilcorp Energy Company | Vaquillas Ranch (Lobo Cons.) | 1 | 14K | 1.51M | Oct 1997 – Aug 2026 |
| Petty Ranch G-1-171498 | St. Mary Land & Exploration Co. | Catarina, SW. (San Miguel-Gas) | 1 | 13.9K | 456K | Dec 1998 – May 2008 |
| Villarreal G-4-162379 | Hilcorp Energy Company | Benavides (Lobo Cons.) | 1 | 13.9K | 2.16M | Mar 1997 – Jan 2023 |
| Petty, O. S. G-1-114012 | White Oak Operating Company LLC | Catarina, SW. (San Miguel-Gas) | 1 | 13.9K | 515K | by Jan 1993 – Feb 2016 |
| Maria Lafon Unit G-4-141558 | Columbus Energy, LLC | Rodriguez (Lobo 6) | 1 | 13.9K | 6.87M | by Jan 1993 – Jun 2018 |
| Dcrc-Sec. 3 O-4-12223 | Tri-C Resources, Inc. | Moca (Wilcox 4700) | 1 | 13.8K | 25.3K | Jul 1993 – Apr 1994 |
| Galvan Ranch G-1-301806 | Caturus Energy, LLC | Briscoe Ranch (Eagleford) | 1 | 13.8K | 638K | Jun 2026 – Aug 2026 |
| Carr G-4-142737 | Hilcorp Energy Company | Vaquillas Ranch (Lobo Cons.) | 1 | 13.8K | 2.04M | by Jan 1993 – Apr 1999 |
| Petty, O. S. A-2 G-1-138087 | White Oak Operating Company LLC | Catarina, SW (San Miguel,oil) | 1 | 13.8K | 369K | by Jan 1993 – Feb 2016 |
| Vaquillas Ranch A3 G-4-189843 | Hilcorp Energy Company | Vaquillas Ranch (Lobo Cons.) | 1 | 13.8K | 737K | Jun 2002 – Aug 2026 |
| Hachar, D.D. G-4-140872 | Columbus Energy, LLC | Clark Ranch (Lobo) | 1 | 13.8K | 4.67M | by Jan 1993 – Aug 2026 |
| M.L.E.I. Pena, H.L. G-4-126259 | Chevron U. S. A. Inc. | La Perla (Lobo Cons.) | 1 | 13.8K | 1.26M | by Jan 1993 – May 2005 |
| Galvan Ranch G-1-299526 | Caturus Energy, LLC | Briscoe Ranch (Eagleford) | 1 | 13.8K | 2.79M | Aug 2025 – Aug 2026 |
| Bruni Mineral A G-4-141845 | Killam Oil Co., Ltd. | B.M.T. (Lobo Cons.) | 1 | 13.7K | 1.48M | by Jan 1993 – Aug 2026 |
| Briscoe G G-1-280996 | SM Energy Company | Briscoe Ranch (Eagleford) | 1 | 13.7K | 239K | Jul 2016 – Aug 2025 |
| Pescadito State 2006 G-4-272903 | Killam Oil Co., Ltd. | Valley (Navarro) | 1 | 13.7K | 280K | Jan 2014 – Jul 2016 |
| Galvan Ranch G-1-296039 | Caturus Energy, LLC | Lorenzo (Austin Chalk) | 1 | 13.7K | 147K | Jul 2024 – Jul 2026 |
| Vaquillas Ranch A1 G-4-261296 | Hilcorp Energy Company | Vaquillas Ranch (Lobo Cons.) | 1 | 13.7K | 1.11M | Mar 2011 – Dec 2018 |
| B.M.T. G-4-172215 | Hilcorp Energy Company | B.M.T. (Lobo Cons.) | 1 | 13.7K | 5.51M | Jan 1999 – Jul 2026 |
| Rottersman G-4-166649 | Arete Operating Company II, LLC | Rottersman (Lobo) | 1 | 13.7K | 3.16M | Jan 1998 – Aug 2026 |
| Dcrc-Sec. 101F O-4-12530 | Union Pacific Resources Company | Moca (Sand 4, Seg. 6) | 1 | 13.7K | 16.2K | Oct 1995 – Mar 1997 |
| Meador 1451 G-1-271560 | Lewis Petro Properties, Inc. | Briscoe Ranch (Eagleford) | 1 | 13.7K | 3.17M | Nov 2012 – Aug 2026 |
| Laurel G-4-164267 | Varas Energy Operating Company, | Cuba Libre (Wilcox Cons.) | 1 | 13.7K | 858K | Aug 1997 – Oct 2015 |
| San Roman 'A' G-4-274827 | Lewis Petro Properties, Inc. | Owen (Olmos) | 1 | 13.7K | 3.16M | May 2014 – Aug 2026 |
| Meador 1451 G-1-275761 | Lewis Petro Properties, Inc. | Briscoe Ranch (Eagleford) | 1 | 13.6K | 2.92M | May 2014 – Aug 2026 |
| Kathleen Marie G-4-176016 | Teal Energy USA, Inc. | Maria H. Llanos (6400) | 1 | 13.6K | 2.09M | Nov 1999 – Feb 2025 |
| Lessor, Mary Etta O-4-12226 | Conoco Inc. | Big Cowboy (Wilcox 4800) | 1 | 13.6K | 268K | Aug 1993 – Oct 1998 |
| Keidel-Tejones 1664 G-4-123644 | Columbus Energy, LLC | Vaquillas Ranch (Lobo) | 1 | 13.6K | 1.8M | by Jan 1993 – Oct 2000 |
| Carr G-4-145126 | Hilcorp Energy Company | Vaquillas Ranch (Lobo Cons.) | 1 | 13.5K | 1.46M | Apr 1993 – Dec 1998 |
| K & H Fee "1620" G-4-145435 | Killam Oil Co., Ltd. | Villegas (Middle Wilcox 7950) | 1 | 13.5K | 1.86M | Apr 1993 – Dec 2019 |
| Moos Heirs "21" O-4-13580 | Dewbre Petroleum Corporation | Tal Vez, East (Queen City) | 1 | 13.5K | 495 | Nov 2009 – Aug 2015 |
| Hirsch Estate 1766 G-4-91289 | Hilcorp Energy Company | Big Cowboy (Lobo) | 1 | 13.5K | 2.03M | by Jan 1993 – Aug 2026 |
| Galvan Ranch G-1-281045 | Caturus Energy, LLC | Briscoe Ranch (Eagleford) | 1 | 13.5K | 3.15M | Mar 2017 – Jul 2026 |
| Webb County School Land 504 G-1-279297 | Lewis Petro Properties, Inc. | Hawkville (Eagleford Shale) | 1 | 13.4K | 5.61M | Apr 2016 – Aug 2026 |
| Bruni Mineral -A- G-4-84900 | Killam Oil Co., Ltd. | Juanita (Lobo) | 1 | 13.4K | 2.61M | by Jan 1993 – Aug 2026 |
| Vergara, G. B. G-4-114491 | Hilcorp Energy Company | Vaquillas Ranch (Lobo Cons.) | 1 | 13.4K | 1.55M | by Jan 1993 – Aug 2026 |
| Williamson, Stanley "B" G-4-143740 | EOG Resources, Inc. | Cinco Compadres (Lobo) | 1 | 13.4K | 1.14M | by Jan 1993 – Aug 2004 |
| Frost National Bank G-4-139395 | Hilcorp Energy Company | Villegas (Middle Wilcox 7950) | 1 | 13.4K | 1.94M | by Jan 1993 – Aug 2026 |
| Barrera-Leyendecker Gas Unit 1 G-4-133571 | Sanchez Oil & Gas Corporation | Leyendecker (6900) | 1 | 13.4K | 1.07M | by Jan 1993 – Aug 1998 |
| El Gato G-4-118871 | Hilcorp Energy Company | Vaquillas Ranch (Lobo Cons.) | 1 | 13.3K | 1.72M | by Jan 1993 – Aug 2026 |
| B.M.T. G-4-170548 | Hilcorp Energy Company | B.M.T. (Lobo Cons.) | 1 | 13.3K | 4.35M | Jul 1998 – Aug 2026 |
| Briscoe B G-4-145693 | Mountain V Texas, LLC | Vaquillas Ranch (Lobo Cons.) | 1 | 13.3K | 760K | Mar 1993 – Aug 2026 |
| Laurel, Alonzo Z. Ltd. "A" G-4-157723 | Varas Energy Operating Company, | Cuba Libre (3RD Hinnant) | 1 | 13.3K | 693K | Jan 1996 – Jun 2004 |