| McAllen Fieldwide Unit G-4-188005 | Totalfinaelf E&P USA Inc only | McAllen (Consolidated FB-B) | Hidalgo | 1 | 5.51K | 455K | Nov 2001 – Apr 2002 |
| Fina-Conoco Fee G-4-138024 | Fina Oil & Chemical Company only | Frost, North (Ashby FB III) | Starr | 1 | 5.5K | 211K | by Jan 1993 – Feb 1994 |
| Las Vegas Ranch O-1-12368 | Sabinal Resources, Inc. only | Pearsall (Austin Chalk) | Dimmit | 1 | 5.49K | 255 | by Jan 1993 – Mar 2015 |
| Btlt G-4-241007 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Starr | 1 | 5.49K | 239K | Jun 2008 – Sep 2009 |
| Blucher, C. F. H. O-4-10791 | Logas Energy, LLC only | Tijerina-Canales-Blucher( Scott) | Jim Wells | 6 | 5.47K | 20.2K | by Jan 1993 – Aug 1994 |
| Fina Conoco Fee G-4-130638 | Fina Oil & Chemical Company only | Frost, West (VX-Wood) | Starr | 1 | 5.42K | 667K | by Jan 1993 – Jan 1997 |
| King Ranch Tijerina G-4-270829 | EOG Resources, Inc. only | T-C-B (Vxbg Consolidated) | Kleberg | 1 | 5.4K | 147K | Sep 2013 – Nov 2017 |
| Dixie Mortgage-Hopkins Gas Unit G-4-133819 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 5.37K | 397K | Feb 1993 – Aug 2026 |
| Gates Ranch "B" O-1-14338 | White Oak Operating Company LLC only | Catarina, SW. (Olmos-2) | Webb | 1 | 5.36K | 28.2K | Apr 2001 – Oct 2011 |
| Tampke, Bill O-1-14507 | Tampke Service Co. only | Taylor-Ina | Medina | 10 | 5.34K | 0 | Feb 2004 – Aug 2026 |
| Minaldi, Ronald J. Unit G-6-90862 | Fair Oil, Ltd. only | Green Fox (Pettit 6200) | Marion | 1 | 5.34K | 757K | by Jan 1993 – Aug 2006 |
| Salinas, A. M. O-2-3319 | H & T Oil & Gas Company, Inc. only | Person (Edwards) | Karnes | 1 | 5.31K | 168K | by Jan 1993 – Mar 1998 |
| Cardinals Gas Unit G-6-251132 | Adamas Energy LLC only | Martinsville (Travis Peak) | Nacogdoches | 1 | 5.3K | 889K | May 2008 – May 2021 |
| Neinast G-3-276548 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Washington | 1 | 5.27K | 105K | May 2014 – Nov 2022 |
| Brainard O-14-6948 | Alpar Resources, Inc. only | Special (Atoka) | Roberts | 1 | 5.21K | 118K | Sep 1993 – Oct 1995 |
| Boston Texas Land & Trust G-4-196729 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 5.18K | 208K | Sep 2003 – Mar 2012 |
| Hopkins, M. A. Gas Unit G-4-183045 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 5.14K | 603K | May 2001 – Jan 2005 |
| De Tijerina, H.C. G-4-79989 | Remora Operating, LLC only | T.-C.-B. (Upper Frio Cons.) | Jim Wells | 1 | 5.14K | 638K | by Jan 1993 – Aug 2026 |
| Petty, O. S. G-1-111166 | White Oak Operating Company LLC only | Catarina, SW. (San Miguel-Gas) | Webb | 1 | 5.13K | 336K | by Jan 1993 – Feb 2016 |
| Ammann, Celestina Unit G-3-208084 | Weathers Exploration, Inc. only | Nada (Wilcox 9700 FB 3) | Colorado | 1 | 5.12K | 1.34M | Feb 2005 – Jun 2021 |
| Aztec Oscar C O-1-17137 | Texas Secondary Oil Corporation only | Taylor-Ina | Medina | 4 | 5.1K | 0 | Nov 2012 – Aug 2026 |
| Btlt A G-4-178872 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 5.05K | 507K | Jul 2000 – Aug 2026 |
| Ina Fisher 6 O-10-44621 | Conocophillips Company only | Dollarhide (Devonian) | Andrews | 1 | 5.03K | 18.9K | Jun 2010 – Feb 2013 |
| Petty, O. S. G-1-80446 | Kerns O & G, Inc. only | Catarina, SW. (San Miguel-Gas) | Webb | 1 | 5.02K | 120K | by Jan 1993 – Feb 2000 |
| Jackson Estate O-2-8616 | J&G Oil & Gas only | Sandy Creek (Marginulina) | Jackson | 1 | 5.01K | 6.99K | Feb 2001 – Jun 2005 |
| TSL33100, ST48 G-4-164668 | Sabco Operating Company only | Encinal Channel (FB-a, K-8) | Nueces | 1 | 5K | 279K | Sep 1997 – Sep 1999 |
| Stumberg, H.E. Jr. et Al O-1-7852 | Kerns Petroleum, Inc. only | Catarina Farms (Olmos) | Dimmit | 4 | 4.99K | 32.4K | by Jan 1993 – Jun 2004 |
| Detijerina,h.c. G-4-58831 | Freedom Energy, Ltd. only | T.-C.-B. (Upper Frio Cons.) | Jim Wells | 1 | 4.99K | 550K | by Jan 1993 – Feb 2003 |
| Schrade, Alvina O-2-6961 | Freddy's Well Service, Inc. only | Arneckeville (Yegua 4870,E) | De Witt | 1 | 4.97K | 16 | Apr 1993 – Jul 2023 |
| McAllen Fieldwide Unit G-4-37174 | Fina Oil & Chemical Company only | McAllen (Marks FB B) | Hidalgo | 1 | 4.96K | 433K | Feb 1993 – Sep 1994 |
| Slick, T. B Estate G-4-160377 | Fina Oil & Chemical Company only | Borosa (Vicksburg # 5, S.) | Starr | 1 | 4.95K | 541K | May 1996 – Jul 1999 |
| Zappe, Marie et Al G-3-166742 | Rising Star Energy Partners II, only | Anahuac, W. (Marginulina "A") | Chambers | 1 | 4.95K | 1.91M | Dec 1997 – May 2020 |
| Miesch - St. Katrina O-1-13937 | Stonegate Operators, Inc. only | Nine Year (Georgetown) | La Salle | 1 | 4.95K | 13.9K | Feb 1995 – Apr 2010 |
| Collins, Claude Jr. Estate O-10-31354 | Ladd Oil & Gas Corporation only | China Draw (Ellenburger) | Sterling | 1 | 4.92K | 14 | Apr 1995 – Jan 2005 |
| Aztec Oscar D O-1-17222 | Texas Secondary Oil Corporation only | Taylor-Ina | Medina | 4 | 4.91K | 0 | Nov 2012 – Aug 2026 |
| Jefferson Land Co G-3-175352 | Finaly Resources LLC only | Lovells Lake, N. (7800) | Jefferson | 1 | 4.88K | 2.79M | Nov 1999 – Dec 2013 |
| Eschenburg, R.L. II et. Al. O-1-9175 | Cei Operating LLC only | Marcelina Creek (Austin Chalk) | Wilson | 1 | 4.85K | 94 | by Jan 1993 – Dec 2014 |
| Janicke, Frank O-1-7019 | Texas Secondary Oil Corporation only | Taylor-Ina | Medina | 6 | 4.84K | 21 | by Jan 1993 – Aug 2026 |
| Slick, T. B Estate G-4-161264 | Fina Oil & Chemical Company only | El Ebanito (Vicksburg 11) | Starr | 1 | 4.83K | 409K | May 1996 – Aug 1999 |
| Rhodes, J. E. O-1-3768 | Texas Secondary Oil Corporation only | Taylor-Ina | Medina | 1 | 4.78K | 21 | by Jan 1993 – Aug 2026 |
| McAllen Fieldwide Unit G-4-189112 | Totalfinaelf E&P USA Inc only | McAllen (Lower Marks) | Hidalgo | 1 | 4.74K | 443K | Feb 2001 – Jan 2003 |
| Boston Texas Land & Trust G-4-286365 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 4.74K | 684K | Apr 2019 – Aug 2026 |
| Nina Maria O-9-15432 | Paint Rock Operating, LLC only | Millersview, W. (Cross Cut SD) | Concho | 1 | 4.74K | 1.74K | Jul 2003 – Aug 2008 |
| Odilina, Vera G-4-133491 | Sedco Resources Inc only | Santa Cruz, N. (Yegua 8800) | Duval | 1 | 4.73K | 136K | by Jan 1993 – May 1995 |
| Weinstrom, Herbert & Janet Elain O-1-6420 | Texas Secondary Oil Corporation only | Taylor-Ina | Medina | 2 | 4.72K | 21 | by Jan 1993 – Aug 2026 |
| De Tijerina, H. C. G-4-14667 | Remora Operating, LLC only | T.-C.-B. (Upper Frio Cons.) | Jim Wells | 1 | 4.7K | 717K | by Jan 1993 – Aug 2026 |
| Gates Ranch G-1-175384 | White Oak Operating Company LLC only | Catarina, SW. (San Miguel-Gas) | Webb | 1 | 4.68K | 152K | Dec 1999 – Sep 2012 |
| Brann, Regina G-4-178379 | Merit Energy Company only | Jeffress (Vicksburg Q) | Hidalgo | 1 | 4.67K | 359K | Jun 2000 – Aug 2026 |
| Powell O-9-11751 | Clifton, Joe B. Exploration, Inc only | Coralina Ranch (Canyon) | Schleicher | 2 | 4.65K | 26 | by Jan 1993 – Apr 1996 |
| State Tract -181- O-4-10851 | Fina Oil & Chemical Company only | Bird Island (10-a Seg A) | Kleberg | 1 | 4.65K | 16.1K | by Jan 1993 – Aug 1995 |