| Hernandez O-4-7491 | Price Drilling & Exploration Co. only | Orcones (5200-Oil) | Duval | 2 | 65.2K | 124K | by Jan 1993 – Dec 2005 |
| Benavides, A. "C" O-4-11907 | Prime Operating Company only | El Mesquite (5200) | Duval | 3 | 65K | 309K | by Jan 1993 – Jul 2007 |
| Duval Ranch O-4-1089 | Ragars Oil & Gas Co. only | Govt. Wells, N. | Duval | 6 | 64.8K | 115K | by Jan 1993 – Aug 2026 |
| Miller O-4-12637 | Proline Energy Resources Inc only | Longhorn (Hiawatha) | Duval | 2 | 64.6K | 273K | Jan 1997 – Jun 2011 |
| DCR-State 76/52 O-4-12063 | Killam Oil Co., Ltd. only | Govt. Wells, N. (1740 Sand) | Duval | 4 | 64.5K | 2.8K | by Jan 1993 – Oct 2006 |
| Twizzler O-4-13859 | Glencrest Resources only | Charamousca, West (3350) | Duval | 5 | 64K | 0 | Jan 2014 – Aug 2026 |
| Kohler, V. -A- O-4-13250 | KD Energy, LLC only | Viggo (Queen City No. 2) | Duval | 2 | 63.7K | 70.7K | Mar 2004 – Oct 2021 |
| Badgley, A. H. Fee O-4-2861 | Hilcorp Energy Company only | Seven Sisters | Duval | 8 | 63.2K | 19 | by Jan 1993 – Aug 2026 |
| Hahl, -A- O-4-1065 | Newman Operating Company only | Govt. Wells, N. | Duval | 3 | 62.9K | 111 | by Jan 1993 – Apr 2015 |
| Exxon Yates Ranch Fee "D" O-4-9796 | Remora Operating, LLC only | Strake (3700) | Duval | 4 | 62.9K | 102K | by Jan 1993 – Jul 2026 |
| Duval County Ranch Co. O-4-6465 | Cordele Development Corporation only | Neely, East ( 700) | Duval | 7 | 62.8K | 173 | by Jan 1993 – Jul 2026 |
| Vera Trust G-4-225848 | Eliteenergyholdings LLC only | Santa Cruz, N. (Yegua 8800) | Duval | 1 | 62.8K | 2.3M | Mar 2007 – Oct 2023 |
| Killam Freer Ranch 196 O-4-12909 | Killam Oil Co., Ltd. only | Freer Ranch (6TH Queen City) | Duval | 3 | 60.9K | 39.4K | Oct 1999 – Apr 2010 |
| Driscoll, Clara O-4-5276 | Chapco, Inc. only | Piedras Pintas Dome | Duval | 1 | 60K | 38 | Mar 1993 – Jan 2026 |
| Vela, Lazaro G-4-134284 | Welderxp Ltd. only | Jaboncillos (Yegua 4-Seg.b) | Duval | 1 | 59.7K | 2.96M | by Jan 1993 – Dec 2015 |
| Martin, R. S. -C- O-4-422 | Hilcorp Energy Company only | Casa Blanca | Duval | 7 | 59.7K | 111 | by Jan 1993 – Dec 2025 |
| DCR 257 O-4-12329 | Killam Oil Co., Ltd. only | Lundell | Duval | 2 | 59.6K | 7 | Mar 1994 – Aug 2026 |
| Hubberd, Mary C. -B- O-4-1537 | Hilcorp Energy Company only | Loma Novia | Duval | 10 | 59.5K | 111 | by Jan 1993 – Aug 2023 |
| Vasquez, A. G-4-166497 | Noble Energy Inc only | McNeil Ranch (Yegua 1) | Duval | 1 | 59.3K | 2.32M | Jan 1998 – Aug 2002 |
| Serna, Refugio O-4-2826 | Serna Inc. only | Seven Sisters | Duval | 3 | 59K | 38 | by Jan 1993 – Aug 2026 |
| Peters-State "A" O-4-12427 | Killam Oil Co., Ltd. only | Tiger (Queen City) | Duval | 1 | 58.6K | 314K | Nov 1994 – Mar 2004 |
| Serna, Donato "A" G-4-184975 | Vaquero Operating only | Cuatro de Julio (Queen City) | Duval | 1 | 58.5K | 1.99M | Sep 2001 – Jun 2019 |
| Vela, Lazaro O-4-11422 | Welderxp Ltd. only | Jaboncillos (Hockley 5900) | Duval | 3 | 57.9K | 491K | by Jan 1993 – Jan 2016 |
| Mann, W.C. O-4-12483 | Duval Maple Leaf I, Inc. only | Edr (Cole) | Duval | 4 | 57.3K | 26K | Aug 1995 – Mar 2015 |
| Duval Ranch, Sec. #100, a/C 2 O-4-2112 | Dewbre, Jerry C., Trustee only | Piedre Lumbre | Duval | 6 | 57.2K | 21 | by Jan 1993 – Mar 2015 |
| Driscoll Foundation O-4-11800 | Home Petroleum Corp. only | Bennett Ranch (3RD Cook Mtn.) | Duval | 4 | 57K | 75.6K | by Jan 1993 – Aug 2026 |
| Exxon State G-4-163679 | Remora Operating, LLC only | Loma Novia, NE (Wilcox Mackhank) | Duval | 1 | 57K | 3.46M | Mar 1997 – May 2013 |
| Self Gas Unit G-1-167875 | Varas Energy Operating Company, only | Hostetter (Wilcox A) | Duval | 1 | 56.1K | 3M | Mar 1998 – Aug 2026 |
| Hoffman, H. J. O-4-11487 | JTB Oil Company, Inc. only | Hofman Ranch (5400) | Duval | 2 | 55.8K | 1.42K | by Jan 1993 – Nov 2021 |
| Parr Sunray G-4-197379 | Cerberus Engineering, LLC only | Parr Sunray (Yegua Consolidated) | Duval | 1 | 55.6K | 2.6M | Aug 2003 – Dec 2020 |
| Welder, J.F., Heirs "C" O-4-2842 | United Operating, LLC only | Seven Sisters | Duval | 5 | 55.5K | 86 | Feb 1993 – Nov 2015 |
| Mew G-4-180326 | Diamond G Production only | Cuatro de Julio (Queen City) | Duval | 1 | 55.4K | 2.12M | Sep 2000 – Dec 2022 |
| DCR-State 64-11 Oil Unit O-4-12257 | Killam Oil Co., Ltd. only | Govt. Wells, N. | Duval | 1 | 55.3K | 923 | Sep 1993 – Aug 2026 |
| Hunt, C. E. O-4-1080 | Hilcorp Energy Company only | Govt. Wells, N. | Duval | 1 | 55.1K | 111 | by Jan 1993 – Aug 2026 |
| De la Fuente, Willie O-4-12502 | Los Hijos de Sanchez J LLC only | LABBE(2900) | Duval | 1 | 54.7K | 166 | Nov 1995 – Sep 2022 |
| Badgley, A. H. O-4-2829 | Providence Oil Prod. only | Seven Sisters | Duval | 3 | 54.1K | 266 | by Jan 1993 – Jun 2026 |
| Duval Ranch 79 Cole -C- Unit O-4-7638 | Killam Oil Co., Ltd. only | D C R-79 | Duval | 13 | 54.1K | 15 | May 1993 – Aug 2026 |
| DCR-State 64-7 Oil Unit O-4-12222 | Killam Oil Co., Ltd. only | Govt. Wells, N. | Duval | 1 | 53.8K | 2.1K | Jul 1993 – May 2025 |
| Welder, J. F., Hrs. -B- O-4-6554 | R&B Oil and Gas, LLC only | Seven Sisters, W. (Cole 1725) | Duval | 2 | 53.8K | 144 | by Jan 1993 – Aug 2026 |
| Welder GU 217 G-4-212263 | Remora Operating, LLC only | Seven Sisters, S. (Massive) | Duval | 1 | 53.6K | 2.92M | Jul 2005 – Feb 2024 |
| Lundell, Arthur O-4-1142 | 3D Oil Company, LLC only | Govt. Wells, South | Duval | 3 | 53.5K | 144 | by Jan 1993 – Aug 2026 |
| Mann, W. C./Southers, R. L. O-4-12504 | Duval Maple Leaf I, Inc. only | Edr (Cole) | Duval | 3 | 53.1K | 18.4K | Oct 1995 – Dec 2015 |
| Duval State Section 64 O-4-2876 | Dewbre, Jerry C., Trustee only | Seventy-Six, West | Duval | 4 | 52.9K | 21 | by Jan 1993 – Nov 2018 |
| R J Garrett O-4-14047 | Abaco Operating, LLC only | La Juana (Pettus Sand) | Duval | 1 | 52.7K | 126K | Mar 2017 – Apr 2024 |
| Wiederkehr, L. O-4-8371 | Black Gold Operating Co, LLC only | Govt. Wells, N. (Yegua 3250) | Duval | 10 | 52.7K | 5.6K | by Jan 1993 – May 2018 |
| Parr Sunray G-4-203720 | Welderxp Ltd. only | Parr Sunray (Yegua Consolidated) | Duval | 1 | 52.5K | 3.04M | May 2004 – Sep 2017 |
| Vela, M. O-4-1557 | Newman Operating Company only | Loma Novia | Duval | 9 | 51.9K | 21 | by Jan 1993 – May 2012 |
| Welder, J. F., Hrs. -E- O-4-2816 | Stonegate Operators, Inc. only | Seven Sisters | Duval | 2 | 51.5K | 142 | by Jan 1993 – Sep 2009 |
| Parr, Atlee O-4-5764 | Newman Operating Company only | Buena Suerte, N. (Tinney FB-2) | Duval | 2 | 51.5K | 21 | by Jan 1993 – May 2011 |
| Duval Ranch Sec. 578 O-4-8767 | Killam Oil Co., Ltd. only | Sarnosa, West | Duval | 3 | 51.4K | 21 | by Jan 1993 – Aug 2026 |