| Jenkins, C. C. G-4-137672 | Cabot Oil & Gas Corporation only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 9.72K | 1.42M | Jan 1993 – Oct 2008 |
| Engleman, J. C., Jr. G-4-14022 | Lucky Lad Energy, LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 8.89K | 1.03M | Jan 1993 – Aug 2020 |
| Guerra, A. G-4-132653 | Cabot Oil & Gas Corporation only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 8.22K | 1.28M | Jan 1993 – Jul 2003 |
| Wilcox, H. E. G-4-13984 | Lucky Lad Energy, LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 7.29K | 708K | Jan 1993 – Apr 2018 |
| Engleman, J. C., Jr. G-4-13995 | Lucky Lad Energy, LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 7.08K | 677K | Jan 1993 – Feb 2026 |
| Youngblood Gas Unit G-4-14004 | Lucky Lad Energy, LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 4.6K | 853K | Jan 1993 – Feb 2026 |
| Weinfield, Milton G-4-13983 | Faulconer, Vernon E., Inc. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 4.46K | 419K | Jan 1993 – Oct 2009 |
| De Cavazos, C. C. G-4-13993 | Faulconer, Vernon E., Inc. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 4.3K | 407K | Jan 1993 – Mar 2004 |
| Harding, Glen G-4-154431 | Deguello Operating LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 3.87K | 1.63M | Mar 1995 – Jul 2003 |
| Cardenas, Josefa G-4-33078 | Lucky Lad Energy, LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 3.42K | 572K | Jan 1993 – May 2021 |
| Harding, Glen G-4-193585 | Deguello Operating LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 3.36K | 2.82M | May 2000 – Dec 2012 |
| Rio Grande Gas Unit I G-4-149408 | Deguello Operating LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 3.27K | 232K | Jan 1994 – Mar 2006 |
| Engelman Community -A- G-4-13977 | Lucky Lad Energy, LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 2.74K | 194K | Jan 1993 – Apr 2017 |
| Montgomery, W.R. Gas Unit G-4-92388 | Cody Energy LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 2.49K | 381K | Jan 1993 – Jan 1999 |
| Schultz G-4-135530 | Faulconer, Vernon E., Inc. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 2.04K | 1.68M | Jan 1993 – Feb 2011 |
| La Blanca Gas Unit G-4-156123 | Green Exploration Company only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 2.01K | 813K | Oct 1995 – Jun 2016 |
| T. Smith GS Unit G-4-147337 | Texas Independent Explor Ltd. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 1.87K | 533K | Apr 1993 – Jun 2004 |
| Cardenas, Josefa G-4-138788 | Tesoro E&P Company, L.P. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 1.8K | 605K | Jan 1993 – Dec 1997 |
| De Cavazos, C. C. G-4-14021 | Apollo Petro Fuels LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 1.72K | 652K | Jan 1993 – Dec 2015 |
| Engleman Gardens Gas Unit G-4-72817 | Faulconer, Vernon E., Inc. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 1.68K | 72K | Jan 1993 – Jan 2004 |
| Youngblood Gas Unit G-4-14030 | Faulconer, Vernon E., Inc. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 1.65K | 195K | Jan 1993 – Feb 2010 |
| Rio Grande Gas Unit II G-4-135365 | Contract Energy, L.L.C. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 1.64K | 685K | Jan 1993 – Mar 1997 |
| Cardenas, Josefa G-4-139041 | Rincon Petroleum Corporation only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 1.19K | 328K | Jan 1993 – Dec 1997 |
| Harding/Lbgu G-4-138945 | Rincon Petroleum Corporation only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 1.13K | 1.42M | Jan 1993 – Feb 2002 |
| Guerra, Arcadio G-4-14016 | Cabot Oil & Gas Corporation only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 987 | 567K | Jan 1993 – Dec 2015 |
| Rio Grande Gas Unit II G-4-134140 | Deguello Operating LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 906 | 403K | Jan 1993 – Dec 2012 |
| Harding, Glen G-4-193920 | Deguello Operating LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 851 | 296K | Feb 2003 – Mar 2008 |
| Cardenas G-4-142556 | Texas Independent Explor., Inc. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 667 | 116K | Jan 1993 – May 1997 |
| Smith G-4-182802 | Cabot Oil & Gas Corporation only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 666 | 561K | May 2001 – Dec 2012 |
| Decavazos, C. C. G-4-137796 | Gn&j LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 639 | 334K | Jan 1993 – Dec 2015 |
| Cardenas, J. -A- G-4-131761 | Rincon Petroleum Corporation only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 602 | 57.9K | Jan 1993 – Feb 1996 |
| De la Vina, Juan G-4-137897 | Faulconer, Vernon E., Inc. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 450 | 667K | Jan 1993 – Nov 2006 |
| Cavazos, R. G-4-131452 | Tesoro E&P Company, L.P. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 425 | 52.7K | Jan 1993 – Sep 1997 |
| Montgomery, W. R. G-4-13996 | Cody Energy LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 339 | 252K | Jan 1993 – Aug 2013 |
| Cardenas, A.M. et Al G-4-89769 | Devon Energy Production Co, L.P. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 318 | 593K | Jan 1993 – Dec 2011 |
| Rio Grande Gas Unit II G-4-136439 | Contract Energy, L.L.C. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 314 | 374K | Jan 1993 – Oct 1996 |
| Guerra, Arcadia G-4-94729 | Cabot Oil & Gas Corporation only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 220 | 466K | Jan 1993 – Dec 2015 |
| Cardenas, Jesus A. & Salvador J. G-4-13989 | Tesoro E&P Company, L.P. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 136 | 29.7K | Jan 1993 – Nov 1995 |
| Rio Grande Gas Unit II G-4-148907 | Deguello Operating LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 77 | 237K | Dec 1993 – Feb 2003 |
| Guerra, Arcadia G-4-85846 | Cody Energy LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 59 | 17.8K | Jan 1993 – Jun 1993 |
| Smith Gas Unit G-4-186877 | Cabot Oil & Gas Corporation only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 54 | 12.8K | Nov 2001 – Jul 2004 |
| Harding, Glen G-4-208348 | Deguello Operating LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 46 | 234K | Jan 2005 – Dec 2019 |
| De Lavina, Juan, Jr. Est. G-4-13971 | Faulconer, Vernon E., Inc. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 16 | 873 | Jan 1993 – Aug 1993 |
| Guerra, Arcadia G-4-99719 | Cabot Oil & Gas Corporation only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 13 | 199K | Jan 1993 – Dec 2015 |
| Glen Harding Gas Unit G-4-161789 | Contract Energy, L.L.C. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 7 | 146K | Jan 1997 – Apr 1999 |
| Rio Grande Gas Unit II G-4-136480 | Contract Energy, L.L.C. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 4 | 591K | Jan 1993 – May 2000 |
| Rio Grande Gas Unit II G-4-145907 | Contract Energy, L.L.C. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 2 | 47.5K | Apr 1993 – May 1994 |
| Engelman Community -A- G-4-13976 | Faulconer, Vernon E., Inc. only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 1 | 454 | Feb 1993 – Jun 1993 |
| Youngblood, E.T. Etal G-4-103697 | Key Energy Services, LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 0 | 0 | — |
| De Cavazos, C. C. G-4-13969 | Cody Energy LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 0 | 0 | — |