| Kasman G-3-222272 | Rap Operating, L.L.C. only | Hamman Deep (Frio 12,000) | Matagorda | 1 | 211K | 5.91M | Apr 2006 – Jan 2019 |
| Hamman Ranch G-4-189387 | Merit Energy Company only | Monte Christo, N(vicksburg T LO) | Hidalgo | 1 | 163K | 15.1M | Oct 2001 – Aug 2011 |
| Hamman Ranch G-4-183253 | Merit Energy Company only | Monte Christo, N(vicksburg T LO) | Hidalgo | 1 | 123K | 6.38M | Jan 2001 – Jun 2004 |
| Hamman Ranch G-4-180796 | Merit Energy Company only | Monte Christo, N. (Vicksburg T) | Hidalgo | 1 | 114K | 20.3M | Dec 2000 – Sep 2020 |
| Hamman G-3-192569 | Eqv Operating LLC only | Sunflower (Upper Woodbine) | Polk | 1 | 106K | 14.4M | Oct 2002 – Sep 2016 |
| Hamman Ranch G-4-170477 | Merit Energy Company only | Monte Christo (Vksbg KK) | Hidalgo | 1 | 99.7K | 4.45M | Sep 1998 – Feb 2009 |
| Krenek, Frank G-3-195280 | Hamman Oil & Refining Company only | Cooley (Meek Sand) | Fort Bend | 1 | 70.3K | 2.34M | May 2003 – Apr 2008 |
| Bright & Schiff Hamman Gas Unit G-4-148684 | Merit Energy Company only | Monte Christo (Vksbg-Brown) | Hidalgo | 1 | 68.7K | 3.74M | Mar 1994 – Apr 2026 |
| Milberger Gas Unit G-3-210822 | Rap Operating, L.L.C. only | Hamman, East (10,870) | Matagorda | 1 | 66.2K | 1.92M | Jun 2005 – Jan 2023 |
| Milberger Gas Unit G-3-211023 | South Bay Resources, L.L.C. only | Hamman, East (11,200 Frio) | Matagorda | 1 | 62.5K | 1.32M | Aug 2005 – May 2013 |
| Hamman Ranch G-4-183322 | Merit Energy Company only | Monte Christo, N. (Vicksburg T) | Hidalgo | 1 | 60.6K | 19.6M | May 2001 – May 2015 |
| Hamman Ranch G-4-186386 | Merit Energy Company only | Monte Christo, N. (Vicksburg T) | Hidalgo | 1 | 59.5K | 8.72M | Aug 2001 – Nov 2004 |
| Talafuse G-3-212241 | South Bay Resources, L.L.C. only | Hamman, East (11,200 Frio) | Matagorda | 1 | 53.8K | 1.5M | Nov 2005 – Dec 2011 |
| Hamman Ranch G-4-155445 | Merit Energy Company only | Monte Christo (Vksbg KK) | Hidalgo | 1 | 43.2K | 7.72M | Sep 1995 – Mar 2009 |
| Milberger, F. J. G-3-222480 | Rap Operating, L.L.C. only | Hamman, East (11,200 Frio) | Matagorda | 1 | 43.2K | 1.51M | Aug 2006 – Jan 2022 |
| Arnold Heirs G-3-223833 | Houston Energy, L.P. only | Hamman, East ( Richer) | Matagorda | 1 | 41.9K | 1.07M | Feb 2007 – Dec 2009 |
| Goolsbee G-3-234911 | Rap Operating, L.L.C. only | Hamman, East (11,200 Frio) | Matagorda | 1 | 39.5K | 946K | Sep 2007 – Jan 2023 |
| Miller, L. H. Gas Unit G-3-151805 | Hamman Oil & Refining Company only | Jennings Lake (Frio 9500) | Matagorda | 1 | 37.3K | 825K | Dec 1994 – Nov 1997 |
| Hamman, John "B" G-4-114104 | Hilcorp Energy Company only | Monte Christo (Vksbg GG) | Hidalgo | 1 | 34.2K | 3.8M | by Jan 1993 – Apr 2026 |
| Talafuse Gas Unit G-3-254779 | Amrwr, LLC only | Hamman, East (11,200 Frio FB B) | Matagorda | 1 | 34.2K | 755K | Jun 2008 – Jan 2023 |
| Hamman Ranch G-4-194656 | El Paso E & P Company, L. P. only | Monte Christo, N. (Vicksburg T) | Hidalgo | 1 | 32.8K | 2.86M | Feb 2003 – Jan 2006 |
| Hamman Ranch G-4-190770 | Merit Energy Company only | Monte Christo, N(vicksburg T LO) | Hidalgo | 1 | 31.1K | 6.7M | May 2002 – Sep 2007 |
| Hamman G-3-199885 | Eqv Operating LLC only | Sunflower (Upper Woodbine) | Polk | 1 | 27.3K | 11.2M | Jan 2004 – Apr 2026 |
| Milberger Gas Unit G-3-246582 | South Bay Resources, L.L.C. only | Hamman, East (11,200 Frio) | Matagorda | 1 | 27.1K | 303K | Feb 2008 – Jul 2010 |
| Goolsbee G-3-250050 | Rap Operating, L.L.C. only | Hamman, East (11,150) | Matagorda | 1 | 27K | 451K | Jul 2008 – May 2022 |
| Hamman Ranch G-4-194827 | Merit Energy Company only | Monte Christo, N(vicksburg T LO) | Hidalgo | 1 | 26.9K | 2.92M | Feb 2003 – Apr 2015 |
| Hamman Heirs G-4-193765 | Merit Energy Company only | Monte Christo, E. (16,900) | Hidalgo | 1 | 25K | 2.7M | Dec 2002 – Jul 2024 |
| Grimes GU G-3-216896 | South Bay Resources, L.L.C. only | Hamman, East (11,500) | Matagorda | 1 | 23.4K | 1.1M | Aug 2006 – Aug 2010 |
| Hamman, John "B" G-4-149252 | Hilcorp Energy Company only | Monte Christo (Vksbg GG) | Hidalgo | 1 | 21.2K | 12.4M | Apr 1994 – Feb 2013 |
| Hamman Ranch G-4-172514 | El Paso Production Oil & Gas Co. only | Monte Christo (Vksbg O-15) | Hidalgo | 1 | 18.7K | 980K | Feb 1999 – Sep 2005 |
| Milberger G-3-209426 | Rap Operating, L.L.C. only | Hamman, East (11,200 Frio) | Matagorda | 1 | 17.4K | 239K | Dec 2004 – Jul 2010 |
| Krenek, Frank Unit G-3-202536 | Hamman Oil & Refining Company only | Cooley (Meek Sand) | Fort Bend | 1 | 15.9K | 391K | Mar 2004 – Mar 2015 |
| Hamman Ranch G-4-172290 | El Paso E & P Company, L. P. only | Monte Christo (Vksbg KK) | Hidalgo | 1 | 15.8K | 2.09M | Jan 1999 – Feb 2007 |
| Horak Gas Unit G-3-225126 | South Bay Resources, L.L.C. only | Hamman, East (11,200 Frio) | Matagorda | 1 | 15K | 342K | Jan 2007 – Jul 2010 |
| Hamman Ranch G-4-182219 | Merit Energy Company only | Monte Christo, N. (Vicksburg T) | Hidalgo | 1 | 14.9K | 8.83M | Feb 2001 – Apr 2008 |
| Hamman Ranch G-4-180503 | Merit Energy Company only | Monte Christo, N(vicksburg T LO) | Hidalgo | 1 | 14.1K | 12.1M | Sep 2000 – Apr 2026 |
| Hamman Ranch G-4-183757 | El Paso E & P Company, L. P. only | Monte Christo, N. (Vicksburg T) | Hidalgo | 1 | 14.1K | 5.92M | Apr 2001 – Apr 2005 |
| Hamman Ranch G-4-211290 | Newfield Exploration Company only | Monte Christo (Vksbg Cons.) | Hidalgo | 1 | 13.5K | 1.21M | Feb 2005 – Aug 2006 |
| Hamman Ranch G-4-146638 | Merit Energy Company only | Monte Christo (Vksbg KK) | Hidalgo | 1 | 13.1K | 3.83M | Aug 1993 – Oct 2003 |
| Bright & Schiff Hamman Gas Unit G-4-173045 | Merit Energy Company only | Monte Christo (VX-Eckart-EE CNS) | Hidalgo | 1 | 12.9K | 3.55M | Feb 1999 – Apr 2026 |
| Hamman Ranch G-4-170291 | Merit Energy Company only | Monte Christo (Vksbg KK) | Hidalgo | 1 | 12.7K | 5.1M | May 1998 – Apr 2026 |
| Miller, L. H. Gas Unit G-3-118943 | Hamman Oil & Refining Company only | Jennings Lake (Frio 9500) | Matagorda | 1 | 12.6K | 276K | by Jan 1993 – Jan 1996 |
| Hamman Ranch G-4-149889 | Merit Energy Company only | Monte Christo (VX-Eckart-EE CNS) | Hidalgo | 1 | 12.3K | 1.84M | May 1994 – Apr 2026 |
| Talafuse G-3-224009 | South Bay Resources, L.L.C. only | Hamman, East (11,200 Frio) | Matagorda | 1 | 12.1K | 515K | Sep 2006 – Jan 2012 |
| Hamman Ranch G-4-148838 | Merit Energy Company only | Monte Christo (VX-Eckart-EE CNS) | Hidalgo | 1 | 12.1K | 1.94M | Mar 1994 – Nov 2009 |
| Austin G-4-189306 | Hamman Oil & Refining Company only | Jaron (Queen City) | Jim Hogg | 1 | 12K | 476K | Jun 2002 – Nov 2011 |
| Talafuse Gas Unit G-3-257003 | Rap Operating, L.L.C. only | Hamman, East ( FB A) | Matagorda | 1 | 11.7K | 488K | Sep 2008 – May 2012 |
| Hamman Ranch G-4-104274 | Merit Energy Company only | Monte Christo (VX-Eckart-EE CNS) | Hidalgo | 1 | 11.3K | 1.96M | by Jan 1993 – Apr 2026 |
| Hamman Ranch G-4-104272 | Merit Energy Company only | Monte Christo (VX-Eckart-EE CNS) | Hidalgo | 1 | 10.8K | 3.66M | by Jan 1993 – Apr 2026 |
| Austin G-4-188024 | Hamman Oil & Refining Company only | Jaron (Queen City) | Jim Hogg | 1 | 10.7K | 541K | Apr 2002 – Aug 2012 |