| Cox, B F G-4-238711 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 67.8K | 4.34M | Jul 2008 – Aug 2026 |
| Lefner et al Gas Unit G-4-234933 | Suemaur Expl. & Prod., LLC | Chile Vieja (Frio) | 1 | 67.5K | 2.48M | Jan 2008 – Mar 2017 |
| Lefner et al GU G-4-233177 | Dewbre Petroleum Corporation | Chile Vieja (Frio) | 1 | 67K | 3.8M | Nov 2007 – Apr 2020 |
| Cox, B. F. G-4-255403 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 64.1K | 5.12M | May 2010 – Aug 2026 |
| Sauz Ranch Mulatos Pasture O-4-14076 | Shoco Production LLC | Willamar, West | 6 | 63.5K | 0 | Jul 2018 – Jul 2026 |
| Yturria, Fausto O-4-13294 | Texas Oil and Gas Operating, LLC | La Sara (6250) | 1 | 60.3K | 62.3K | Sep 2004 – Jan 2015 |
| Petru, V. A. G-4-208796 | Petrovybe Opco LLC | La Sal Vieja (Deep) | 1 | 57.2K | 1.23M | Mar 2005 – Aug 2026 |
| Petru, V. A. G-4-201233 | Petrovybe Opco LLC | La Sal Vieja (Deep) | 1 | 57.1K | 2.08M | Mar 2004 – Aug 2026 |
| Clarence O'Berg Gas Unit G-4-143190 | Proline Energy Resources Inc | La Sal Vieja (Frio Cons) | 1 | 56.5K | 1.62M | by Jan 1993 – Mar 2025 |
| Willamar Community -E- O-4-6429 | Citation Oil & Gas Corp. | Willamar (6350) | 3 | 56.1K | 92.2K | by Jan 1993 – Aug 2026 |
| Yturria, H. O-4-13001 | Cody Energy LLC | Raymondville (F-28) | 1 | 54.4K | 101K | Mar 2001 – Jan 2002 |
| Yturria O-4-13864 | Texas Oil and Gas Operating, LLC | La Sara (4300) | 2 | 53.7K | 0 | Apr 2014 – Oct 2024 |
| Lefner et al Gas Unit G-4-238507 | Dewbre Petroleum Corporation | Chile Vieja (Frio) | 1 | 53.1K | 2.9M | Apr 2008 – Aug 2026 |
| Yturria Cattle Co. "B" O-4-12464 | Maynard Oil Co. | La Sara (No. 22 Sd.) | 1 | 53K | 61.1K | May 1995 – Dec 1999 |
| Rio Farms G-4-224320 | Pogo Producing Company LLC | Hargill (Frio Cons.) | 1 | 52.7K | 2.12M | Jan 2007 – Jun 2010 |
| Cox, B. F. G-4-248306 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 49.3K | 2.69M | Apr 2009 – Dec 2018 |
| Yuturria Cattle Co. O-4-10944 | Texas Oil and Gas Operating, LLC | La Sara (No. 14-a Sand) | 1 | 48.7K | 16 | by Jan 1993 – Apr 2015 |
| Thomas G-4-247890 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 48.7K | 2.03M | Mar 2009 – Aug 2026 |
| Yturria O-4-13344 | Texas Oil and Gas Operating, LLC | La Sara, NE. (7590) | 2 | 48.2K | 17.6K | Apr 2005 – Oct 2015 |
| Cox, B. F. G-4-251669 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 48K | 3.35M | Jul 2009 – Jun 2026 |
| Yturria Cattle Company O-4-14171 | Texas Oil and Gas Operating, LLC | La Sara (No. 21 Sand) | 1 | 47.1K | 0 | Nov 2021 – Oct 2025 |
| Sauz Ranch Mulatos Pasture O-4-14077 | Shoco Production LLC | Willamar (Graben a-1 Sd., N.) | 1 | 44.3K | 0 | Aug 2018 – Jul 2026 |
| Cox, B. F. G-4-252834 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 39.4K | 2.32M | Nov 2009 – Aug 2026 |
| Rio Farms "a" Gas Unit G-4-227192 | OXY USA Inc. | Hargill (Frio Cons.) | 1 | 35.9K | 1.62M | Mar 2007 – Nov 2012 |
| Thomas G-4-245275 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 35.3K | 2.29M | Oct 2008 – Aug 2026 |
| Henderson, J.W. et al Gas Unit G-4-237330 | Dewbre Petroleum Corporation | La Sal Vieja (Frio L) | 1 | 35.1K | 3.78M | Mar 2008 – Aug 2026 |
| La Sal Vieja Development G-4-243087 | Proline Energy Resources Inc | La Sal Vieja (Frio Cons) | 1 | 33.3K | 2.43M | Nov 2008 – Apr 2026 |
| Cox, B. F. G-4-248693 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 32.6K | 1.58M | Jun 2009 – Jun 2026 |
| Wrightsman, et al GU G-4-252519 | Dewbre Petroleum Corporation | Chile Vieja (Frio) | 1 | 32.3K | 1.29M | Oct 2009 – Aug 2026 |
| Sorrells et Al G-4-248355 | Dewbre Petroleum Corporation | La Sal Vieja (Frio Cons) | 1 | 31.9K | 1.54M | Apr 2009 – Jun 2025 |
| Ames et al GU G-4-244685 | Dewbre Petroleum Corporation | Chile Vieja (Frio) | 1 | 31.4K | 3.56M | Dec 2008 – Aug 2026 |
| Yturria, Frank D. et Al O-4-13070 | Cody Energy LLC | Raymondville (Consolidated) | 2 | 29.9K | 196K | Dec 2001 – Mar 2007 |
| Petru, V. A. G-4-270812 | Petrovybe Opco LLC | La Sal Vieja (Frio L) | 1 | 29.8K | 579K | Jul 2013 – Aug 2026 |
| Yturria L & C Co. NCT-2 O-4-12528 | Cody Energy LLC | Raymondville (a- 5) | 1 | 28.7K | 11.7K | Dec 1995 – Sep 2001 |
| Bondy GU G-4-226742 | Dewbre Petroleum Corporation | Chile Vieja (Frio Deep) | 1 | 28.2K | 2M | Aug 2006 – Aug 2026 |
| Sauz Ranch Mulatos Pasture O-4-12283 | Chestnut Explor. and Prod., Inc. | Willamar, West (Miocene 5850) | 2 | 27.7K | 23.3K | Feb 1994 – Jul 2009 |
| Lefner et al Gas Unit G-4-273104 | Dewbre Petroleum Corporation | Chile Vieja (Frio) | 1 | 27.6K | 1.48M | Jan 2014 – Aug 2026 |
| Yturria O-4-14167 | Texas Oil and Gas Operating, LLC | La Sara (No. 21 Sand) | 1 | 27.2K | 0 | Nov 2021 – Oct 2025 |
| Yturria G-4-242005 | Texas Oil and Gas Operating, LLC | La Sara, E. (7890) | 1 | 27K | 453K | Feb 2008 – Jun 2019 |
| Sauz Ranch Mulatos Pasture O-4-12349 | Flint Oak Energy, LLC | Willamar, West (Miocene 6100) | 2 | 26.6K | 44.5K | Apr 1994 – Jun 2009 |
| Geis Harvey O-4-13142 | Proline Energy Resources Inc | La Sal Vieja | 1 | 26.6K | 193K | Feb 2003 – Jul 2017 |
| Yturria L&C Co. NCT-2 G-4-117983 | Apollo Petro Fuels LLC | Raymondville (Consolidated) | 1 | 26.5K | 1.6M | by Jan 1993 – Jan 2019 |
| Petru, V. A. G-4-250364 | Petrovybe Opco LLC | La Sal Vieja (Frio L) | 1 | 26K | 1.98M | Apr 2008 – Aug 2026 |
| Yturria, H. G-4-200455 | Apollo Petro Fuels LLC | Raymondville (Consolidated) | 1 | 26K | 5.38M | Feb 2004 – Dec 2020 |
| Vaughan G-4-185876 | Blakenergy Operating, LLC | I. Y. Garcia (Frio) | 1 | 25.6K | 1.62M | Sep 2001 – Apr 2005 |
| Sauz Ranch Mulatos Pasture O-4-13770 | Chestnut Explor. and Prod., Inc. | Willamar, West (Miocene 5100) | 3 | 25.1K | 28.5K | Jul 2012 – May 2017 |
| Yturria, Frank D. et Al G-4-175809 | Cody Energy LLC | Raymondville (Consolidated) | 1 | 24.7K | 1.36M | Oct 1999 – May 2009 |
| Thomas G-4-217343 | XTO Energy Inc. | I. Y. Garcia (M-30) | 1 | 23.8K | 1.19M | Feb 2006 – Mar 2014 |
| Yturria O-4-13954 | Texas Oil and Gas Operating, LLC | La Sara (No. 40 Sand) | 2 | 23.7K | 0 | Apr 2014 – Apr 2025 |
| Cox, B. F. G-4-255406 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 22.8K | 2.57M | May 2010 – May 2026 |