| Scanio, Miguelita G-2-233636 | Digital Operating Company LLC | Refugio-Fox (6750) | 1 | 180K | 552K | Mar 2007 – Feb 2022 |
| Welder 'C' G-2-234179 | Hilcorp Energy Company | Sharps Lake, N. (5040) | 1 | 113K | 310K | Jan 2008 – May 2015 |
| Welder Ford G-4-266216 | Dallas Petroleum Group, LLC | Taft, West (5600) | 1 | 85K | 128K | Apr 2012 – May 2017 |
| Shelton G-2-208006 | Neumin Production Company | Refugio-Fox (5500) | 1 | 78.4K | 144K | Dec 2004 – Oct 2009 |
| Willow Creek -B- G-2-231490 | T - C Oil Company | Willow Creek (8000) | 1 | 74.8K | 166K | Nov 2007 – Aug 2010 |
| Miguelita Scanio G-2-244399 | Acock/Anaqua Operating Co., LP | Refugio-Fox (6600) | 1 | 72.3K | 175K | Oct 2008 – Jan 2019 |
| Meoc-Mellon-State Unit G-2-295806 | T-C Oil Company, LLC | Mary Ellen O'Connor (8300) | 1 | 63.1K | 168K | May 2023 – Apr 2026 |
| Braman -D- G-2-288971 | T-C Oil Company, LLC | Braman (8000) | 1 | 56.6K | 669K | Jun 2019 – Apr 2026 |
| Roche G-2-183598 | Wiser Oil Company, The | Kathleen (Frio B) | 1 | 47.2K | 133K | Feb 2000 – Oct 2002 |
| Jacks et Al G-2-177715 | Neumin Production Company | Big Jim (Third Sinton) | 1 | 45.1K | 355K | Dec 1999 – Aug 2001 |
| Shay G-2-221898 | Paloma Operating, LLC | Refugio Old (6550 Frio) | 1 | 41.8K | 71.1K | Sep 2006 – Feb 2023 |
| Baumgartner -A- G-2-250674 | T-C Oil Company, LLC | Vidauri, North (6400) | 1 | 32.9K | 243K | Oct 2008 – Aug 2014 |
| Willow Dreek -B- G-2-231474 | T - C Oil Company | Willow Creek (8000) | 1 | 30.3K | 153K | Oct 2007 – Aug 2010 |
| Scanio/Shelton G-2-241967 | High Plains Gas Systems, Inc. | Mission River (8300 Vksbg) | 1 | 30.2K | 611K | Aug 2008 – Dec 2014 |
| Roche G-2-227407 | Salida Exploration, LLC | Roche, S. (Chamberlain) | 1 | 29.4K | 342K | Feb 2007 – Jul 2014 |
| Swyka G-2-171442 | C & E Operating, Inc. | Peponi Ranch (Frio 4800) | 1 | 25.9K | 2.58M | Sep 1998 – Jul 2011 |
| Meoc-Mellon-State Unit G-2-292773 | T-C Oil Company, LLC | Mary Ellen OCONNOR(8100) | 1 | 24.6K | 1.29M | Feb 2022 – Oct 2025 |
| Braman -A- G-2-286087 | T-C Oil Company, LLC | Braman (8300) | 1 | 24.2K | 1.35M | Jun 2018 – Mar 2024 |
| Shelton G-2-233811 | Kebo Oil & Gas, Inc. | Lake Pasture (FT-690) | 1 | 24K | 949K | Jan 2008 – May 2015 |
| Baumgartner -A- G-2-275006 | T-C Oil Company, LLC | Dudley Campbell (Frio 6200) | 1 | 23.9K | 91.5K | Sep 2014 – May 2017 |
| Willow Creek-B- G-2-231739 | T-C Oil Company, LLC | Willow Creek (8000) | 1 | 23.6K | 318K | Oct 2007 – Jul 2011 |
| Scanio, Miguelita G-2-207964 | Digital Operating Company LLC | Refugio-Fox (6600) | 1 | 23.6K | 253K | Nov 2004 – May 2020 |
| Roche G-2-231460 | Salida Exploration, LLC | Roche, S. (Chamberlain) | 1 | 22.7K | 199K | Oct 2007 – Jan 2009 |
| Scanio/Shelton G-2-212390 | Acock/Anaqua Operating Co., LP | Mission River | 1 | 20.4K | 196K | Apr 2005 – Apr 2015 |
| Roche (6000 Sand) Unit G-2-152225 | H & D Operating Company | Roche (6000 Sand) | 1 | 20.4K | 1.79M | Nov 1994 – Jan 2000 |
| Salt Creek -A- G-2-236778 | T - C Oil Company | Salt Creek Ranch (8400) | 1 | 19.4K | 888K | Jun 2007 – Jul 2009 |
| Roche (6000 Sand) Unit G-2-147914 | H & D Operating Company | Roche (6000 Sand) | 1 | 18.7K | 1.66M | Oct 1993 – Oct 1998 |
| Scanio Shelton G-2-252998 | Paloma Operating, LLC | Mission River (6100) | 1 | 18.7K | 57.8K | May 2009 – Jun 2023 |
| Tract 72 G-2-150100 | Kebo Oil & Gas, Inc. | Refugio-Fox (6400) | 1 | 18.4K | 1.28M | Mar 1994 – Dec 2014 |
| Lambert Gas Unit G-2-234183 | Hilcorp Energy Company | Tom Oconnor (7930) | 1 | 18.2K | 887K | Jan 2008 – Feb 2009 |
| Roche G-2-175282 | Wiser Oil Company, The | Cactus (Frio Massive) | 1 | 18.2K | 319K | Jun 1999 – Jun 2001 |
| Roche, K.D. -A- G-2-128541 | H & D Operating Company | Roche (-B-) | 1 | 17.9K | 374K | Jan 1993 – Jan 1996 |
| Schmidt G-2-170253 | C & E Operating, Inc. | Peponi Ranch (Frio 4800) | 1 | 17.5K | 779K | Aug 1998 – Apr 2011 |
| Welder Heirs G-2-232689 | Kebo Oil & Gas, Inc. | Lake Pasture (FT-690) | 1 | 17.5K | 754K | Sep 2007 – Jul 2013 |
| Welder-Terrell G-2-230170 | C & E Operating, Inc. | Devils Run (Chamberlain 3A) | 1 | 17.4K | 917K | May 2007 – Mar 2016 |
| Willow Creek -B- G-2-234324 | T-C Oil Company, LLC | Willow Creek (8000) | 1 | 16.9K | 289K | Mar 2008 – May 2010 |
| Lambert, M. F. G-2-144497 | Devon Energy Production Co, L.P. | Siene Bean (6960) | 1 | 16.9K | 1.15M | Jan 1993 – Oct 1996 |
| Braman -H- G-2-300399 | T-C Oil Company, LLC | Braman (8200) | 1 | 16.2K | 347K | May 2025 – Apr 2026 |
| Crews G-2-195121 | Christopher Oil & Gas Inc | La Rosa (6750, Below, Gas) | 1 | 16.1K | 268K | May 2003 – Jan 2009 |
| Scanio, Miguelita G-2-234584 | Digital Operating Company LLC | Refugio Old (6550 Frio) | 1 | 15K | 615K | Dec 2007 – Nov 2025 |
| O'Brien, J. M. "E" G-2-231786 | Greta Operating Company LLC | Greta, W. (6300) | 1 | 14.5K | 568K | Jun 2007 – Apr 2026 |
| Heard, J. F. B. G-2-218347 | Greta Operating Company LLC | Greta, North (6100) | 1 | 14.4K | 317K | Dec 2005 – Oct 2014 |
| Scanio / Shelton G-2-223050 | High Plains Gas Systems, Inc. | Mission River (8300 Vksbg) | 1 | 13.7K | 874K | Mar 2006 – Nov 2010 |
| Welder Heirs G-2-170630 | C & E Operating, Inc. | Peponi Ranch (Frio 4800) | 1 | 13.1K | 3.34M | Sep 1998 – Jun 2011 |
| Rooke, F. B. 4 G-2-175949 | C & E Operating, Inc. | Woodsboro, West (Frio 6600) | 1 | 12.8K | 243K | Nov 1999 – Jan 2005 |
| Swyka G-2-170636 | C & E Operating, Inc. | Peponi Ranch (Frio 4800) | 1 | 12.5K | 2.74M | Sep 1998 – Jul 2011 |
| Twin Mott -B- G-2-231346 | T - C Oil Company | TM Lake (7500) | 1 | 12K | 571K | Sep 2007 – Aug 2011 |
| Scanio, Miguelita G-2-179352 | Cummins & Walker Oil Co., Inc. | Refugio-Fox (6500) | 1 | 11.5K | 56.6K | Jul 2000 – Mar 2001 |
| Roche, K.D. A G-2-148725 | H & D Operating Company | Roche (-B-) | 1 | 11.4K | 1.23M | Mar 1994 – Apr 1997 |
| Rooke B G-2-256232 | Coastal Plains Exploration, LLC | Woodsboro, West (6900) | 1 | 11.2K | 294K | Feb 2010 – Jul 2013 |