| Driscoll, Robert O-4-5421 | Hilcorp Energy Company | Conoco Driscoll | 75 | 2.19M | 1.78M | Jan 1993 – Jul 2026 |
| Duval Ranch, Sec. #288 O-4-452 | McGowan Working Partners, Inc. | Charamousca, South | 20 | 854K | 168K | Jan 1993 – Jul 2026 |
| Dinn -A- O-4-635 | Aurora Resources Corporation | Dinn | 20 | 844K | 109 | Jan 1993 – Jul 2026 |
| White, P. E., -B- O-4-5624 | Killam Oil Co., Ltd. | Lundell (Mirando No. 1) | 28 | 836K | 27.4K | Jan 1993 – Jul 2026 |
| Duval Ranch -59- O-4-1138 | Killam Oil Co., Ltd. | Govt. Wells, South | 21 | 798K | 21 | Jan 1993 – Jul 2026 |
| Weil O-4-8630 | Trans-Tex Operating LLC | Sarnosa, West | 13 | 665K | 21 | Jan 1993 – Jul 2026 |
| DCR-State 366/76/64/54 O-4-12087 | Killam Oil Co., Ltd. | Govt. Wells, N. | 26 | 655K | 12.3K | Jan 1993 – Jul 2026 |
| Dcrc Sec. 152 O-4-8648 | Killam Oil Co., Ltd. | Charamousca (Wilcox 5400, E.) | 2 | 626K | 2.35K | Jan 1993 – Jul 2026 |
| Petnox-Chernosky W.F. Unit O-4-7809 | Southwest Royalties, Inc. | Petrox (Chernosky Sand) | 23 | 572K | 19 | Jan 1993 – Jul 2026 |
| Duval Ranch Sec. 62 O-4-2874 | Dewbre, Jerry C., Trustee | Seventy-Six, West | 28 | 508K | 21 | Jan 1993 – Jul 2026 |
| Killam O-4-12920 | Mountain V Texas, LLC | Dove Rustler (Chernosky) | 6 | 480K | 247K | Oct 1999 – Jul 2026 |
| Dcrc MF NCT-25 O-4-3795 | Reserve Operating Corp. | Eagle Hill | 19 | 480K | 21 | Jan 1993 – Jul 2026 |
| Duval Ranch, Sec. # 257 a/C 1 O-4-1702 | Killam Oil Co., Ltd. | Lundell (Pettus) | 6 | 477K | 19.1K | Jan 1993 – Jul 2026 |
| Duval County Ranch Co. O-4-425 | Hinds Petroleum, LLC | Casa Blanca | 34 | 463K | 1.35K | Jan 1993 – Jul 2026 |
| White, P. E. -B- O-4-1694 | Killam Oil Co., Ltd. | Lundell | 14 | 442K | 50.5K | Jan 1993 – Jul 2026 |
| Hoffman Loma Novia 2730 SD Unit O-4-8031 | Hilcorp Energy Company | Hoffman (2730 Loma Novia) | 33 | 410K | 8.06K | Jan 1993 – Jul 2026 |
| Texaco- Exxon Tomas Fee O-4-11838 | Ragars Oil & Gas Co. | Govt. Wells, N. | 7 | 409K | 606 | Jan 1993 – Jul 2026 |
| Gruy B O-4-14006 | Aurora Resources Corporation | Kohler | 9 | 390K | 0 | Jul 2015 – Jul 2026 |
| Hubberd, Mary C. -A- O-4-1573 | Hilcorp Energy Company | Loma Novia | 16 | 381K | 111 | Jan 1993 – Jul 2026 |
| Marchbanks O-4-13765 | Awp Operating Company | Tesoro (5000 Pettus) | 2 | 347K | 51.9K | Dec 2012 – Jul 2026 |
| Bishop Cattle Company -B- O-4-1540 | Hilcorp Energy Company | Loma Novia | 17 | 318K | 99 | Jan 1993 – Jul 2026 |
| Gruy A O-4-13966 | Aurora Resources Corporation | Dinn | 6 | 291K | 0 | May 2015 – Jul 2026 |
| Wiederkehr, L. O-4-1101 | Black Gold Operating Co, LLC | Govt. Wells, N. | 44 | 290K | 113K | Jan 1993 – Jul 2026 |
| Kohler, V. -A- O-4-9632 | KD Energy, LLC | Kohler, NE (Mirando #2) | 23 | 275K | 305K | Jan 1993 – Jul 2026 |
| Cocke, William C. O-4-12988 | Remora Operating, LLC | Seven Sisters, E. (Loma Novia) | 1 | 268K | 111K | Oct 2000 – Jul 2026 |
| Lopez -A- O-4-2035 | Trium, Ltd. | Orlee | 18 | 268K | 120 | Jan 1993 – Jul 2026 |
| Duval County Ranch Co. -K- O-4-6866 | Texas Petroleum Investment Co. | Charamousca, W. (Wilcox 2 Seg C) | 14 | 266K | 344K | Jan 1993 – Jul 2026 |
| White, P. E. -B- O-4-5627 | Killam Oil Co., Ltd. | Lundell (Mirando No. 2) | 6 | 258K | 20.8K | Jan 1993 – Jul 2026 |
| Killam "257" O-4-12458 | Killam Oil Co., Ltd. | Lundell | 8 | 249K | 0 | May 1995 – Jul 2026 |
| Duval County Ranch Co. O-4-6478 | Cordele Development Corporation | Neely, East (1150) | 9 | 239K | 173 | Jan 1993 – Jul 2026 |
| Fenner O-4-12880 | Hilcorp Energy Company | Loma Novia | 3 | 233K | 0 | Dec 1999 – Jul 2026 |
| Bennett, J. M. O-4-11778 | Hughes, Dan A. Company, L.P. | Bennett Ranch (3RD Cook Mtn.) | 14 | 231K | 545K | Jan 1993 – Jul 2026 |
| State O-4-1126 | 3D Oil Company, LLC | Govt. Wells, South | 11 | 231K | 21 | Jan 1993 – Jul 2026 |
| Worden & Drought Unit O-4-11373 | Firstrike Energy Corporation | Charamousca (Wilcox 5400, E.) | 1 | 231K | 15.1K | Jan 1993 – Jun 2016 |
| SW. San Diego Unit O-4-11273 | B.P. Productions Inc. | San Diego, SW. (Yegua) | 12 | 216K | 125K | Jan 1993 – Jul 2026 |
| Wilson, J. O. O-4-5819 | McGowan Working Partners, Inc. | Lundell, S. (Mirando) | 5 | 212K | 60K | Jan 1993 – Jul 2026 |
| Kohler, V. -A- O-4-1415 | KD Energy, LLC | Kohler | 11 | 205K | 16K | Jan 1993 – Jul 2026 |
| Duvon, Nell M. O-4-1561 | Hilcorp Energy Company | Loma Novia | 5 | 204K | 20 | Jan 1993 – Jul 2026 |
| DCR-State 260 F O-4-12585 | Killam Oil Co., Ltd. | Lundell | 7 | 202K | 0 | May 1996 – Jul 2026 |
| F.N.B. O-4-12082 | Chandler Oil & Gas, LLC | Rancho Solo, NE (Cole) | 5 | 199K | 20.9K | Jan 1993 – Jul 2026 |
| Kohler, V., -A- O-4-6096 | KD Energy, LLC | Viggo (Queen City No. 1) | 10 | 195K | 158K | Jan 1993 – Jul 2026 |
| Dcrc -a- NCT-12 O-4-2878 | Hilcorp Energy Company | Seventy-Six, West | 10 | 193K | 111 | Jan 1993 – Jul 2026 |
| Duval County Ranch Co. -E- O-4-2108 | Production Resources, Inc. | Piedre Lumbre | 16 | 182K | 21 | Jan 1993 – Jul 2026 |
| Killam Freer Ranch "196" O-4-13188 | Killam Oil Co., Ltd. | Tiger (Queen City) | 5 | 181K | 143K | Sep 2003 – Jul 2026 |
| Drought 156 O-4-13838 | Mountain V Texas, LLC | Charamousca (Casa Blanca SD) | 2 | 181K | 0 | Oct 2013 – Jul 2026 |
| D. C. R. C. Tract C O-4-2882 | Schlachter Operating Corporation | Seventy-Six, West | 7 | 181K | 21 | Jan 1993 – Jul 2026 |
| Dcrc MF NCT-64 O-4-7931 | Hilcorp Energy Company | Lundell | 10 | 175K | 111 | Jan 1993 – Jul 2026 |
| Duval County Ranch Co. -K- O-4-7036 | Texas Petroleum Investment Co. | Charamousca, W. (Wilcox 3) | 6 | 171K | 163K | Jan 1993 – Jul 2026 |
| DCR 261A O-4-12099 | Hilcorp Energy Company | Ruthie H. (Wilcox) | 2 | 167K | 215K | Jan 1993 – Jul 2026 |
| DCR 59 O-4-13064 | Hilcorp Energy Company | Tyler T (Queen City #1) | 1 | 166K | 230K | Sep 2001 – Jul 2026 |