| Petru, V. A. G-4-205748 | XTO Energy Inc. | La Sal Vieja (Deep) | 1 | 645K | 12.7M | Jun 2004 – May 2013 |
| Petru, V. A. G-4-208761 | Safari Production Company, Inc. | La Sal Vieja (Deep) | 1 | 423K | 6.9M | Feb 2005 – Apr 2026 |
| Stone Gas Unit G-4-43621 | Proline Energy Resources Inc | La Sal Vieja (Frio Cons) | 1 | 186K | 5.29M | Jan 1993 – Apr 2021 |
| Petru, V. A. G-4-204773 | Safari Production Company, Inc. | La Sal Vieja (Deep) | 1 | 171K | 3.1M | Sep 2004 – Apr 2024 |
| Petru, V. A. G-4-199218 | XTO Energy Inc. | La Sal Vieja (Deep) | 1 | 126K | 6.19M | Nov 2003 – Mar 2008 |
| Yturria, Frank D. et Al G-4-183087 | Cody Energy LLC | Raymondville (Consolidated) | 1 | 107K | 631K | Apr 2001 – Feb 2015 |
| Ames G.U. G-4-220917 | Dewbre Petroleum Corporation | Chile Vieja (Frio) | 1 | 104K | 6.04M | Jul 2006 – Apr 2026 |
| Petru, V. A. G-4-251684 | Petrovybe Opco LLC | La Sal Vieja (Deep) | 1 | 104K | 3.57M | Dec 2007 – Mar 2021 |
| Yturria G-4-253667 | Texas Oil and Gas Operating, LLC | La Sara (No. 41 Sand) | 1 | 102K | 178K | Aug 2009 – May 2022 |
| Ames et al GU G-4-222562 | Dewbre Petroleum Corporation | Chile Vieja (Frio) | 1 | 98.3K | 5.79M | Sep 2006 – Apr 2026 |
| Cox, B. F. G-4-252799 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 98.2K | 7.16M | Oct 2009 – Apr 2026 |
| Petru, V. A. G-4-223447 | XTO Energy Inc. | La Sal Vieja (Deep) | 1 | 96K | 7.74M | Oct 2006 – Oct 2010 |
| Hargill Gas Unit "A" G-4-261128 | Dallas Petroleum Group, LLC | Hargill (Frio Cons.) | 1 | 86K | 4.5M | Mar 2011 – Apr 2026 |
| Kerr et al GU G-4-247130 | Dewbre Petroleum Corporation | La Sal Vieja (Deep) | 1 | 70.1K | 1.64M | Jan 2009 – Apr 2026 |
| Cox, B. F. G-4-248694 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 70K | 4.66M | Jun 2009 – Apr 2026 |
| Cox, B. F. G-4-251486 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 69.2K | 5.24M | Aug 2009 – Apr 2026 |
| Cox, B. F. G-4-251618 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 69.1K | 4.11M | Aug 2009 – May 2025 |
| Lefner et al GU G-4-230701 | Dewbre Petroleum Corporation | Chile Vieja (Frio) | 1 | 68.2K | 3.47M | Sep 2007 – Aug 2022 |
| Cox, B F G-4-238711 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 67.7K | 4.32M | Jul 2008 – Apr 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 | 64K | 5.09M | May 2010 – Apr 2026 |
| Petru, V. A. G-4-208796 | Petrovybe Opco LLC | La Sal Vieja (Deep) | 1 | 57.1K | 1.23M | Mar 2005 – Apr 2026 |
| Petru, V. A. G-4-201233 | Petrovybe Opco LLC | La Sal Vieja (Deep) | 1 | 57K | 2.08M | Mar 2004 – Apr 2026 |
| Clarence O'Berg Gas Unit G-4-143190 | Proline Energy Resources Inc | La Sal Vieja (Frio Cons) | 1 | 56.5K | 1.62M | Jan 1993 – Mar 2025 |
| Lefner et al Gas Unit G-4-238507 | Dewbre Petroleum Corporation | Chile Vieja (Frio) | 1 | 53.1K | 2.9M | Apr 2008 – Apr 2026 |
| 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 |
| Thomas G-4-247890 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 48.7K | 2.03M | Mar 2009 – Apr 2026 |
| Cox, B. F. G-4-251669 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 48K | 3.35M | Jul 2009 – Apr 2026 |
| Cox, B. F. G-4-252834 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 39.4K | 2.31M | Nov 2009 – Apr 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 | 35.2K | 2.28M | Oct 2008 – Apr 2026 |
| Henderson, J.W. et al Gas Unit G-4-237330 | Dewbre Petroleum Corporation | La Sal Vieja (Frio L) | 1 | 34.9K | 3.77M | Mar 2008 – Apr 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 – Apr 2026 |
| Wrightsman, et al GU G-4-252519 | Dewbre Petroleum Corporation | Chile Vieja (Frio) | 1 | 32.2K | 1.28M | Oct 2009 – Apr 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 | 3.55M | Dec 2008 – Apr 2026 |
| Petru, V. A. G-4-270812 | Petrovybe Opco LLC | La Sal Vieja (Frio L) | 1 | 29.7K | 577K | Jul 2013 – Apr 2026 |
| Bondy GU G-4-226742 | Dewbre Petroleum Corporation | Chile Vieja (Frio Deep) | 1 | 28K | 1.98M | Aug 2006 – Apr 2026 |
| Lefner et al Gas Unit G-4-273104 | Dewbre Petroleum Corporation | Chile Vieja (Frio) | 1 | 27.5K | 1.46M | Jan 2014 – Apr 2026 |
| Yturria G-4-242005 | Texas Oil and Gas Operating, LLC | La Sara, E. (7890) | 1 | 27K | 453K | Feb 2008 – Jun 2019 |
| Yturria L&C Co. NCT-2 G-4-117983 | Apollo Petro Fuels LLC | Raymondville (Consolidated) | 1 | 26.5K | 1.6M | Jan 1993 – Jan 2019 |
| Yturria, H. G-4-200455 | Apollo Petro Fuels LLC | Raymondville (Consolidated) | 1 | 26K | 5.38M | Feb 2004 – Dec 2020 |
| Petru, V. A. G-4-250364 | Petrovybe Opco LLC | La Sal Vieja (Frio L) | 1 | 25.9K | 1.98M | Apr 2008 – Apr 2026 |
| Vaughan G-4-185876 | Blakenergy Operating, LLC | I. Y. Garcia (Frio) | 1 | 25.6K | 1.62M | Sep 2001 – Apr 2005 |
| 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 |
| Cox, B. F. G-4-255406 | Wagner Oil Company | La Sal Vieja (Frio Cons) | 1 | 22.8K | 2.57M | May 2010 – Feb 2026 |