| Shay G-2-221898 | Paloma Operating, LLC only | Refugio Old (6550 Frio) | Refugio | 1 | 41.8K | 71.1K | Sep 2006 – Feb 2023 |
| Scanio, Miguelita G-2-234584 | Digital Operating Company LLC only | Refugio Old (6550 Frio) | Refugio | 1 | 15K | 615K | Dec 2007 – Nov 2025 |
| Metzger Gas Unit G-3-137674 | Atlas Operating LLC only | Bay City, East (8150 FB-A) | Matagorda | 1 | 14.7K | 346K | by Jan 1993 – Oct 2020 |
| Ellis G-3-178767 | Sandel Operating Company only | Round Point S (8750 Frio) | Chambers | 1 | 14.6K | 1.11M | Jul 2000 – Jan 2008 |
| Welder "C" G-2-198832 | Hilcorp Energy Company only | Phil Power (5050 Frio) | Refugio | 1 | 9.61K | 229K | May 2002 – Feb 2015 |
| State Tract 352 G-4-189868 | Cabot Oil & Gas Corporation only | Redfish Bay, North (10550 FB-2) | San Patricio | 1 | 6.93K | 914K | Jun 2002 – Apr 2003 |
| Yaklin G-4-237114 | Dewbre Petroleum Corporation only | Ricardo, NE. (7450 Frio) | Kleberg | 1 | 3.04K | 96.8K | Apr 2008 – Sep 2011 |
| Ratliff G-3-208417 | Azimuth Energy, LLC only | Arcola (6750 Frio) | Brazoria | 1 | 2.61K | 351K | Jan 2005 – Aug 2005 |
| Vincik, A.R. G-2-198945 | Wynn-Crosby Energy, Inc. only | Bennview, E. (6450 Frio) | Jackson | 1 | 2.27K | 54.3K | Apr 2003 – Jan 2004 |
| Welder "D" G-2-159747 | Wiser Oil Company, The only | Phil Power (5050 Frio) | Refugio | 1 | 1.23K | 840K | Jul 1996 – Aug 2000 |
| Huffman, V. S. G-3-162267 | Howard Exploration, Inc. only | Arcola (6750 Frio) | Brazoria | 1 | 1.14K | 36.4K | Feb 1997 – Jul 1998 |
| Welder "A" G-4-155175 | Sandalwood Oil & Gas, Inc. only | Sinton, North (2150 Fuente) | San Patricio | 1 | 514 | 16.2K | Jul 1995 – Nov 1995 |
| Sullivan, Joe G-2-147031 | Ventura Oil & Gas Company only | Circle -B- (4950 Frio) | Goliad | 1 | 487 | 50.1K | Oct 1993 – Jun 1994 |
| Welder 'G' G-2-208035 | Forest Oil Corporation only | Phil Power (5050 Frio) | Refugio | 1 | 450 | 262K | Nov 2004 – Nov 2010 |
| Ware G-3-295688 | Ponderosa Oil & Gas, LLC only | Bay City (9050 Frio) | Matagorda | 1 | 400 | 2.25K | May 2023 – Jul 2023 |
| Welder C G-2-166380 | Wiser Oil Company, The only | Phil Power (5050 Frio) | Refugio | 1 | 332 | 602K | Nov 1997 – Apr 2005 |
| Somnitz G-4-14075 | Dewbre Petroleum Corporation only | Santa Maria (8350 Frio) | Hidalgo | 1 | 317 | 171K | by Jan 1993 – Feb 2005 |
| Destiny Farms G. U. G-2-188391 | Pure Resources, L.P. only | Telferner, East (5150 Frio) | Victoria | 1 | 297 | 116K | Feb 2002 – Jan 2003 |
| Bentsen Bros. -A- G-4-157728 | Headington Oil Company only | Hinde (4850 Frio) | Starr | 1 | 267 | 140K | Feb 1996 – Jul 1996 |
| Welder "H" G-2-164448 | Wiser Oil Company, The only | Phil Power (5050 Frio) | Refugio | 1 | 244 | 314K | Aug 1997 – Mar 1999 |
| State Tract 369-L NE/4 G-3-149105 | Black Elk Energy Offshore OP LLC only | Block 368-L (5250 F.B.-1) | Brazos-LB | 1 | 124 | 2.64M | Mar 1994 – Nov 2005 |
| Powitzky, Emory Jr. G-2-138949 | Petro-Hunt Corporation only | Nomeco (4250 Frio) | Victoria | 1 | 98 | 332K | by Jan 1993 – Aug 1996 |
| Welder "H" G-2-163870 | Wiser Oil Company, The only | Phil Power (5050 Frio) | Refugio | 1 | 82 | 69.2K | Jul 1997 – Feb 1999 |
| Shay G-2-163125 | Wiser Oil Company, The only | Phil Power (5050 Frio) | Refugio | 1 | 69 | 64.4K | Apr 1997 – Mar 1999 |
| Shay, Mary A. G-2-148469 | Mueller Engineering Corp. only | Phil Power (5050 Frio) | Refugio | 1 | 62 | 20.9K | Jan 1994 – Jul 1994 |
| Dix G-4-162098 | Pace Production Co. only | Thomas Dix (4550 FLT BLK A) | San Patricio | 1 | 51 | 39.2K | Jan 1997 – Mar 1997 |
| Welder "D" G-2-160422 | Wiser Oil Company, The only | Phil Power (5050 Frio) | Refugio | 1 | 42 | 107K | Aug 1996 – Jul 1997 |
| Thompson Gas Unit G-3-139503 | Alta Mesa Services, LP only | Bay City, East (8150 FB-A) | Matagorda | 1 | 18 | 105K | by Jan 1993 – Feb 1997 |
| Jones, E. Roy, Jr. G-3-164274 | Fredco only | Greathope (5350 Frio) | Wharton | 1 | 10 | 202K | Aug 1997 – Oct 2021 |
| Maraggia-Becker Unit G-2-201428 | Geodominion Petroleum only | Telferner, East (5150 Frio) | Victoria | 1 | 10 | 10.7K | Jan 2004 – Jul 2004 |
| Duncan G-3-180581 | Zinn Petroleum Co. only | Spanish Camp, W. (3950 Frio) | Wharton | 1 | 1 | 108K | Nov 2000 – Aug 2002 |
| Freeborn G-4-133184 | Western Gulf Oil & Gas, LLC only | Amargosa (2750 Frio) | Jim Wells | 1 | 0 | 44.8K | by Jan 1993 – Dec 2017 |
| Dean G-2-288119 | Hilcorp Energy Company only | Telferner, East (5150 Frio) | Victoria | 1 | 0 | 18K | Sep 2019 – Apr 2021 |
| Bentsen Bros. -A- G-4-122129 | BZG E&P LLC only | Hinde (4850 Frio) | Starr | 1 | 0 | 0 | — |
| Treptow, Paul -A- G-2-59212 | Exxcel Operating Company only | Sliva, Southwest (3950 Frio) | Bee | 1 | 0 | 0 | — |
| Williams, James P. G-4-120991 | Texas, Les & Co. only | Taft (6150 Frio) | San Patricio | 1 | 0 | 339 | by Jan 1993 – Sep 2000 |
| McGlothing, Anna Dea et Al G-2-77090 | Eaf Oil & Gas Corporation only | Riverdale (2350 Frio) | Goliad | 1 | 0 | 0 | — |
| Roche, Kathleen D. et Al G-2-113983 | Whitehall Operating Inc. only | Devils Run (6050 Frio) | Refugio | 1 | 0 | 0 | — |
| Salinas, J. G-2-133272 | Big Lake Corporation only | Cologne (4550 Frio E. Segment) | Victoria | 1 | 0 | 0 | — |
| High, Roy G-2-142803 | McRae Exploration & Prod., Inc. only | Richard Adcock (2850 Frio) | Victoria | 1 | 0 | 39.1K | by Jan 1993 – Jul 1993 |
| Shay 'C' G-2-171632 | Wiser Oil Company, The only | Phil Power (5050 Frio) | Refugio | 1 | 0 | 116 | Sep 1998 – Sep 1998 |
| Welder, Minnie S. Est G-2-174973 | Field Petroleum Corp. only | Nomeco (4250 Frio) | Victoria | 1 | 0 | 553K | Aug 1999 – Nov 2009 |
| F. R. C. - Little, et Al G-2-184614 | Shana Petroleum Company only | Provident City, E. (2950 Frio) | Lavaca | 1 | 0 | 7.76K | Jun 2001 – Jan 2002 |
| Vincik, A.R. G-2-262340 | Howard Exploration, Inc. only | Bennview, E. (6450 Frio) | Jackson | 1 | 0 | 39.3K | Aug 2011 – Jul 2012 |
| Ezer-David Grimes II G-3-99765 | Grimes Energy Company only | Round Point S (8750 Frio) | Chambers | 1 | 0 | 0 | — |
| State Tract 369-L NE/4 G-3-101295 | American Coastal Energy, Inc. only | Block 368-L (5250 F.B.-1) | Brazos-LB | 1 | 0 | 48.5K | by Jan 1993 – May 2001 |
| Lanier Forgason et Al G-3-104023 | K-B Exploration Co. only | Spanish Camp, W. (3950 Frio) | Wharton | 1 | 0 | 0 | — |
| Wilson Trust G-3-117200 | Fredco only | Greathope (7150 Frio) | Wharton | 1 | 0 | 0 | — |
| Forgason, Lanier et Al G-3-138499 | Scoggins Oil & Gas Co. only | Spanish Camp, W. (3950 Frio) | Wharton | 1 | 0 | 0 | — |
| Vastar-Elliott G-3-157750 | Royal Production Company, Inc. only | Elliott, N. (3850 Frio) | Hardin | 1 | 0 | 268K | Apr 1996 – Sep 1998 |