| Duval County Ranch Co. -K- O-4-7036 | Texas Petroleum Investment Co. only | Charamousca, W. (Wilcox 3) | Duval | 6 | 171K | 163K | Jun 1994 – Feb 2017 |
| Marchbanks-Cadena 'B' G-4-215828 | Crossroads Petroleum L.L.C. only | Orcones (Frio-Vksbg Cons.) | Duval | 1 | 168K | 1.54M | Oct 2005 – Jan 2023 |
| DCR 261A O-4-12099 | Hilcorp Energy Company only | Ruthie H. (Wilcox) | Duval | 2 | 167K | 215K | by Jan 1993 – May 2017 |
| DCR 59 O-4-13064 | Hilcorp Energy Company only | Tyler T (Queen City #1) | Duval | 1 | 166K | 230K | Sep 2001 – Mar 2021 |
| Lundell-State 140 O-4-12937 | Killam Oil Co., Ltd. only | Lundell | Duval | 5 | 165K | 0 | Apr 2000 – Aug 2026 |
| Byland, J. W. O-4-1551 | Hilcorp Energy Company only | Loma Novia | Duval | 10 | 164K | 21 | by Jan 1993 – Aug 2026 |
| Benavides, Brennan O-4-10723 | Wallis Energy, Inc. only | Longloria (3RD Queen City) | Duval | 2 | 163K | 537K | by Jan 1993 – Jun 2026 |
| Duval Co. Ranch Co. -A- O-4-423 | Hilcorp Energy Company only | Casa Blanca | Duval | 6 | 160K | 111 | by Jan 1993 – Aug 2026 |
| Lundell, E. C. O-4-1124 | 3D Oil Company, LLC only | Govt. Wells, South | Duval | 10 | 160K | 144 | by Jan 1993 – Aug 2026 |
| Barton O-4-14100 | Bridwell Oil Co. only | Vaello (Tedlie) | Duval | 2 | 160K | 0 | Oct 2018 – Aug 2026 |
| DCR-State 260 O-4-12385 | Killam Oil Co., Ltd. only | Lundell | Duval | 4 | 156K | 1 | Sep 1994 – Oct 2025 |
| DCR 262N O-4-12355 | Killam Oil Co., Ltd. only | Hagist Ranch ( Argo) | Duval | 2 | 152K | 57K | Mar 1994 – Jun 2021 |
| Mann, W.C. (South) O-4-12560 | Duval Maple Leaf I, Inc. only | Edr (Cole) | Duval | 3 | 147K | 30.6K | Apr 1996 – May 2016 |
| Exxon-Yates Ranch Fee 'D' G-4-141941 | Exxon Corp. only | Bold Forbes (9550) | Duval | 1 | 143K | 7.25M | by Jan 1993 – Feb 1997 |
| West 76 Dcrc State Oil Unit O-4-7400 | Caribbean Energy LLC II only | Seventy-Six, West | Duval | 11 | 140K | 21 | by Jan 1993 – Aug 2026 |
| Sling G-4-233192 | Dallas Petroleum Group, LLC only | Seven Sisters,w.(wilcox 1,N.) | Duval | 1 | 139K | 7.32M | Dec 2007 – Aug 2026 |
| Duval County Ranch Co. State -P- O-4-1655 | Caribbean Energy LLC II only | Lopez, North (Lopez) | Duval | 9 | 138K | 20 | by Jan 1993 – Oct 2024 |
| Magnolia-Duval Ranch Sec. 208-09 O-4-1083 | Killam Oil Co., Ltd. only | Govt. Wells, N. | Duval | 7 | 136K | 57 | by Jan 1993 – Aug 2026 |
| Duval Ranch Sec. 203 O-4-8921 | Killam Oil Co., Ltd. only | Petrox, N. (Frio 1250) | Duval | 5 | 135K | 57 | by Jan 1993 – Aug 2026 |
| Duval Co. Ranch Co.-State -L- O-4-557 | Caribbean Energy LLC II only | Colmena | Duval | 36 | 134K | 20 | by Jan 1993 – Aug 2026 |
| Duval Co. Ranch Co. -C- O-4-1654 | Caribbean Energy LLC II only | Lopez, North (Lopez) | Duval | 3 | 130K | 20 | by Jan 1993 – Aug 2026 |
| Bishop Duval Land Co., NCT-1 O-4-1151 | Hilcorp Energy Company only | Govt. Wells, South | Duval | 5 | 124K | 19 | by Jan 1993 – Mar 2024 |
| Texaco Fee 207 O-4-12941 | Mountain V Texas, LLC only | Govt. Wells, N. | Duval | 5 | 120K | 20.1K | May 2000 – Jul 2026 |
| Foster, J. R. O-4-13240 | Hilcorp Energy Company only | Hagist Ranch (Upper Wilcox F) | Duval | 2 | 119K | 554K | Jun 2004 – Aug 2026 |
| Alta-Marchbanks O-4-13291 | Tepee Petroleum Co., Inc. only | Tesoro (5000 Pettus) | Duval | 1 | 118K | 38.3K | Feb 2005 – Jul 2010 |
| Hahl, C. W. O-4-1146 | Chumley, George Estate Of only | Govt. Wells, South | Duval | 4 | 118K | 447 | by Jan 1993 – Jul 2026 |
| DCR 295 SW O-4-12328 | Killam Oil Co., Ltd. only | Casa Blanca, West | Duval | 4 | 117K | 7 | Mar 1994 – Aug 2026 |
| Welder Heirs G-4-142436 | Hurd Enterprises, Ltd. only | Bold Forbes (9550) | Duval | 1 | 117K | 5.21M | by Jan 1993 – Oct 2000 |
| Hahl, C. W. Co. -C- O-4-1139 | Providence Oil Prod. only | Govt. Wells, South | Duval | 4 | 116K | 324 | by Jan 1993 – Jul 2026 |
| Duval Ranch, Sec. #203 O-4-2114 | Killam Oil Co., Ltd. only | Piedre Lumbre | Duval | 14 | 115K | 69 | by Jan 1993 – Aug 2026 |
| DCR 152A O-4-12165 | Killam Oil Co., Ltd. only | Casa Blanca, West | Duval | 5 | 115K | 4.21K | Feb 1993 – Aug 2026 |
| Duval County Ranch Company -J- O-4-3480 | Karper Oil & Gas Corporation only | Dejay (Chernosky) | Duval | 1 | 115K | 21 | by Jan 1993 – Jun 2026 |
| Welder Hrs. "A" O-4-2840 | McGowan Working Partners, Inc. only | Seven Sisters | Duval | 3 | 113K | 6.91K | Apr 1995 – Apr 2023 |
| Welder, T. F., Heirs O-4-7410 | Fesco, Ltd. only | Loma Novia, E. (1ST Sand) | Duval | 5 | 113K | 25 | by Jan 1993 – Aug 2026 |
| Weil -C- O-4-8826 | Trans-Tex Operating LLC only | Sarnosa, West | Duval | 1 | 112K | 21 | by Jan 1993 – Aug 2026 |
| Duval County Ranch Co. O-4-6283 | Cordele Development Corporation only | Neely, East ( 600 -A-) | Duval | 6 | 112K | 170 | by Jan 1993 – Jul 2026 |
| Rosemary O-4-3170 | HBC Oil Company, LLC only | Tarancahuas | Duval | 19 | 111K | 23 | by Jan 1993 – Mar 2026 |
| Duval County Ranch Co. -B- O-4-1097 | Hilcorp Energy Company only | Govt. Wells, N. | Duval | 7 | 108K | 21 | by Jan 1993 – Aug 2026 |
| DCR-State 76/52 O-4-12064 | Killam Oil Co., Ltd. only | Govt. Wells, N. | Duval | 5 | 108K | 6.46K | by Jan 1993 – Jan 2020 |
| Germer, C.F. O-4-11375 | Home Petroleum Corp. only | El Mesquite (5200) | Duval | 4 | 108K | 332K | by Jan 1993 – Aug 2026 |
| Moody, L. B. O-4-1130 | Hilcorp Energy Company only | Govt. Wells, South | Duval | 4 | 107K | 111 | by Jan 1993 – Aug 2026 |
| Hoffman, W. K. -B- O-4-4179 | Sanchez Oil & Gas Corporation only | Hoffman (Mirando) | Duval | 2 | 104K | 122 | by Jan 1993 – Oct 2013 |
| Killam Mineral Fee Sect. 189 "A" O-4-12496 | Killam Oil Co., Ltd. only | Cedro Hill | Duval | 2 | 103K | 0 | Sep 1997 – Aug 2026 |
| Duval Co. Ranch Co. -D- O-4-556 | Caribbean Energy LLC II only | Colmena | Duval | 11 | 102K | 20 | by Jan 1993 – Aug 2026 |
| DCR 152A O-4-13829 | Killam Oil Co., Ltd. only | Charamousca, South | Duval | 2 | 99.5K | 0 | May 2013 – Aug 2026 |
| Bazan G-4-184870 | Cimarron Engineering, LLC only | Bazan (Yegua 6100) | Duval | 1 | 98.8K | 2.16M | Aug 2001 – Nov 2014 |
| Welder, J. F., Hrs. -B- O-4-2852 | United Operating, LLC only | Seven Sisters | Duval | 9 | 95.2K | 98 | by Jan 1993 – Nov 2015 |
| Drought 156 O-4-14068 | Mountain V Texas, LLC only | Neely, East ( 700) | Duval | 3 | 94.9K | 0 | Nov 2017 – Aug 2026 |
| Johnson, J. T. O-4-1081 | Providence Oil Prod. only | Govt. Wells, N. | Duval | 2 | 93.8K | 345 | by Jan 1993 – Jul 2026 |
| Dcrc - Section 295 O-4-13744 | Mountain V Texas, LLC only | Casa Blanca, West | Duval | 4 | 93.7K | 0 | Oct 2012 – Jun 2026 |