| Von Blucher G-4-129375 | Urban Oil & Gas Group, LLC only | Brayton, N. (Vicksburg 11100) | Nueces | 1 | 611K | 8M | by Jan 1993 – Dec 2003 |
| State Tract 690/746 & 750 GU G-4-260767 | Orx Resources, L.L.C. only | Tule Lake (Frio Consolidated) | Nueces | 1 | 523K | 2.64M | Mar 2011 – Apr 2026 |
| Von Blucher G-4-136027 | Urban Oil & Gas Group, LLC only | Brayton, N. (Vicksburg 11100) | Nueces | 1 | 404K | 5.19M | by Jan 1993 – Apr 2017 |
| TSL 33100/TR 48/ G-4-180005 | White Marlin Operating Co, LLC only | Encinal Channel (FB-2A, M-4) | Nueces | 1 | 368K | 10.8M | Sep 2000 – Oct 2022 |
| State Tract 750/750A GU G-4-232522 | Orx Resources, L.L.C. only | Tule Lake (Frio Consolidated) | Nueces | 1 | 319K | 3.4M | Nov 2007 – Apr 2026 |
| Berryman, et al Unit G-4-172812 | Proline Energy Resources Inc only | Agua Dulce (Vicksburg Consl.) | Nueces | 1 | 288K | 10.5M | Feb 1999 – Dec 2025 |
| Talbert, L.G. G-4-135183 | Pine Island Operating, L.L.C. only | Corpus Christi, W (Consolidated) | Nueces | 1 | 261K | 6.86M | by Jan 1993 – Apr 2026 |
| Talbert, L. G. G-4-195927 | Pine Island Operating, L.L.C. only | Corpus Christi, W (Consolidated) | Nueces | 1 | 260K | 4.78M | Jun 2003 – Apr 2026 |
| La Jolla G-4-138097 | Linn Operating, Inc. only | Brayton, N. (Vicksburg 11100) | Nueces | 1 | 259K | 1.96M | by Jan 1993 – Jan 1999 |
| Guaranty Title & Trust G-4-186953 | Pine Island Operating, L.L.C. only | Corpus Christi, W (Consolidated) | Nueces | 1 | 259K | 5.78M | Oct 2001 – Apr 2026 |
| State Tract 746A/750A GU G-4-260038 | Orx Resources, L.L.C. only | Tule Lake (Frio Consolidated) | Nueces | 1 | 258K | 1.41M | Nov 2010 – Apr 2026 |
| State Tract 55-8 Unit G-4-270724 | White Marlin Operating Co, LLC only | Corpus Christi Bay, West (8700) | Nueces | 1 | 215K | 4.12M | Jul 2013 – Oct 2022 |
| La Jolla G-4-145366 | Urban Oil & Gas Group, LLC only | Brayton, N. (Vicksburg 11100) | Nueces | 1 | 210K | 2.08M | Mar 1993 – Dec 2003 |
| Chapman Ranch G-4-190455 | Proline Energy Resources Inc only | Mobil-David (Anderson) | Nueces | 1 | 202K | 3.79M | Jul 2002 – Dec 2010 |
| State Tract 689-A G-4-98179 | Texas Petroleum Investment Co. only | Tule Lake | Nueces | 1 | 195K | 7.81M | by Jan 1993 – Apr 2026 |
| Chapman Ranch C G-4-259450 | Proline Energy Resources Inc only | Mobil-David (Anderson) | Nueces | 1 | 191K | 11.8M | Feb 2011 – Feb 2020 |
| State Tract 690/746 & 750 GU G-4-264784 | Orx Resources, L.L.C. only | Tule Lake (Frio Consolidated) | Nueces | 1 | 190K | 1.01M | Oct 2011 – Jul 2025 |
| Gillespie Gas Unit G-4-178026 | Pangea's Edge Operating Co LLC only | Brayton, N. (Vicksburg 9150) | Nueces | 1 | 178K | 1.58M | May 2000 – Apr 2026 |
| Russell-Bevly Unit G-4-257552 | JC Bear Operating LLC only | Mobil-David (Frio 12,600) | Nueces | 1 | 164K | 2.72M | Sep 2010 – Mar 2026 |
| Kampfenkel, et al G. U. G-4-174485 | Proline Energy Resources Inc only | Agua Dulce (Vicksburg Consl.) | Nueces | 1 | 154K | 4.17M | Aug 1999 – Jul 2017 |
| St 49 Permanent Unit G-4-207092 | White Marlin Operating Co, LLC only | Encinal Channel (FB-3B, M-4) | Nueces | 1 | 149K | 8.79M | Nov 2004 – Aug 2016 |
| Burnett, et al Gas Unit G-4-179416 | STS Petroleum LLC only | Agua Dulce (Vicksburg Consl.) | Nueces | 1 | 145K | 6.8M | Oct 2000 – Apr 2026 |
| Simpson, June Shallow GU G-4-210797 | EOG Resources, Inc. only | Shield (AB) | Nueces | 1 | 142K | 1.56M | Apr 2005 – Apr 2015 |
| Charba, et Al G-4-179053 | STS Petroleum LLC only | Agua Dulce (Vicksburg Consl.) | Nueces | 1 | 142K | 832K | Sep 2000 – Apr 2026 |
| Smith Unit G-4-255576 | JC Bear Operating LLC only | Mobil-David (Frio 12,600) | Nueces | 1 | 138K | 2.4M | Feb 2010 – Mar 2026 |
| Chapman Ranch G-4-214728 | Urban Oil & Gas Group, LLC only | Mobil-David (Frio 12,600) | Nueces | 1 | 134K | 6.15M | Aug 2005 – Apr 2010 |
| Blucher, Von G-4-146276 | Urban Oil & Gas Group, LLC only | Brayton, N. (Vicksburg 11,500) | Nueces | 1 | 133K | 1.66M | Jul 1993 – May 2017 |
| State Tract 284 G-4-214915 | Lamar Oil & Gas, Inc. only | Corpus Christi Bayou (K-7) | Nueces | 1 | 129K | 2.33M | Jun 2006 – May 2025 |
| Berryman et al Unit G-4-175113 | Proline Energy Resources Inc only | Agua Dulce (Vicksburg Consl.) | Nueces | 1 | 126K | 4.33M | Nov 1999 – Dec 2025 |
| TSL 33105/TR 53/ G-4-195078 | Sabco Operating Company only | Encinal Channel (FB-1A, M-4) | Nueces | 1 | 123K | 5.93M | Feb 2003 – Mar 2010 |
| TSL M-098041/TR52/ G-4-187846 | Sabco Operating Company only | Encinal Channel (FB-3B, M-4) | Nueces | 1 | 123K | 4.73M | Jan 2002 – Jul 2005 |
| Chapman Ranch "A" G-4-227943 | Decker Operating Co., L.L.C. only | Mobil-David (Howell Hight) | Nueces | 1 | 123K | 1.66M | Feb 2007 – Sep 2025 |
| State Tract 690/746 & 750 GU G-4-249323 | Energy Twenty Operating LLC only | Tule Lake (Frio Consolidated) | Nueces | 1 | 120K | 401K | Jun 2009 – Jan 2017 |
| State Tract 392 G-4-162688 | Boss Expl & Prod Corporation only | Red Fish Bay (Zone 53) | Nueces | 1 | 118K | 655K | Mar 1997 – Jul 2004 |
| Otahal, et al G.U. G-4-180084 | STS Petroleum LLC only | Agua Dulce (Vicksburg Consl.) | Nueces | 1 | 115K | 5.5M | Dec 2000 – Mar 2021 |
| Blossman, et al Gas Unit G-4-193540 | Wallis Energy, Inc. only | Agua Dulce (Vicksburg Consl.) | Nueces | 1 | 114K | 1.48M | Nov 2002 – Apr 2026 |
| State Tract 277 G-4-220454 | Cabot Oil & Gas Corporation only | Stedman Island (C-3) | Nueces | 1 | 110K | 7.86M | May 2006 – Dec 2008 |
| State Tract 308 G-4-179722 | TR Offshore, LLC only | Stedman Island (8120 Frio) | Nueces | 1 | 110K | 1.63M | Oct 2000 – Apr 2025 |
| State Tract 690/746 & 750 GU G-4-275285 | Orx Resources, L.L.C. only | Tule Lake (Frio Consolidated) | Nueces | 1 | 106K | 1.05M | May 2014 – Apr 2026 |
| State Tract 706 GU G-4-270130 | Orx Resources, L.L.C. only | Nueces Bay (12150) | Nueces | 1 | 99.9K | 580K | Feb 2013 – Apr 2026 |
| TSL 33105/TR 53/ G-4-175246 | White Marlin Operating Co, LLC only | Encinal Channel (FB-a, M-4) | Nueces | 1 | 99.9K | 4.06M | Aug 1999 – Dec 2022 |
| State Tract 750/750A GU G-4-261702 | Orx Resources, L.L.C. only | Tule Lake (Frio Consolidated) | Nueces | 1 | 96.4K | 439K | Apr 2011 – Apr 2026 |
| Gillespie Gas Unit G-4-225567 | Pangea's Edge Operating Co LLC only | Brayton, N. (Vicksburg 9250) | Nueces | 1 | 96.1K | 579K | Dec 2006 – Apr 2026 |
| Gillespie G-4-130959 | Alegre Operating, Inc. only | Brayton, N. (Vicksburg 11,100 A) | Nueces | 1 | 93.6K | 1.24M | by Jan 1993 – Nov 2000 |
| TSL 33099/TR 54/ G-4-221704 | White Marlin Operating Co, LLC only | Corpus Christi, E. (G-3) | Nueces | 1 | 89.2K | 984K | Jul 2006 – Jul 2022 |
| Bluntzer, et al Gas Unit G-4-293535 | Suemaur Operating LLC only | Agua Dulce (Vicksburg Consl.) | Nueces | 1 | 88.3K | 1.21M | Sep 2022 – Apr 2026 |
| Blucher, Von G-4-146142 | Devon Energy Production Co, L.P. only | Brayton, N. (Vicksburg 11,500) | Nueces | 1 | 86K | 715K | Jun 1993 – Jun 2011 |
| TSL 33100/TR 48/ G-4-180008 | White Marlin Operating Co, LLC only | Encinal Channel (FB-2A, M-3) | Nueces | 1 | 85.2K | 4.06M | Sep 2000 – Nov 2022 |
| Peterson-Nuss Unit G-4-148986 | Proline Energy Resources Inc only | Corpus Christi, W (Consolidated) | Nueces | 1 | 84.2K | 1.4M | Mar 1994 – Apr 2026 |
| TSL 33100 /TR 48/ G-4-196325 | White Marlin Operating Co, LLC only | Encinal Channel (FB-2A, M-4) | Nueces | 1 | 80.4K | 3.16M | Jul 2003 – Aug 2014 |