| Spear Reynolds Unit F O-2-10566 | Burlington Resources O & G Co LP only | Eagleville (Eagle Ford-2) | Karnes | 4 | 1.45M | 3.48M | Oct 2013 – Aug 2026 |
| Spearman 23 O-14-9396 | Seek Energy, LLC only | Hoover, NE (Granite Wash) | Gray | 3 | 1.14M | 651K | Oct 2014 – Aug 2026 |
| State Spearhead 1114 O-10-53629 | Crescent Energy Operating, LLC only | Hoefs T-K (Wolfcamp) | Pecos | 4 | 1.08M | 3.5M | Jan 2020 – Aug 2026 |
| Spear Reynolds Unit A O-2-10813 | Burlington Resources O & G Co LP only | Sugarkane (Eagle Ford) | Karnes | 2 | 720K | 2.03M | Nov 2013 – Aug 2026 |
| Spear Reynolds Unit C O-2-10645 | Burlington Resources O & G Co LP only | Eagleville (Eagle Ford-2) | Karnes | 1 | 625K | 1.69M | Nov 2013 – Aug 2026 |
| Spears-Jackson-Forbes Unit O-13-28710 | Cobra Oil & Gas Corporation only | Berry (Miss.) | Hardeman | 2 | 566K | 9 | Jan 1994 – Aug 2026 |
| Hovorak-Spearman Unit O-3-21836 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Burleson | 1 | 503K | 727K | by Jan 1993 – Jul 2026 |
| Spear Reynolds Unit D O-2-10649 | Burlington Resources O & G Co LP only | Eagleville (Eagle Ford-2) | Karnes | 1 | 486K | 1.21M | Nov 2013 – Aug 2026 |
| Spear Reynolds C-a Usw B O-2-12323 | Burlington Resources O & G Co LP only | Eagleville (Eagle Ford-2) | Karnes | 1 | 471K | 1.4M | Nov 2021 – Aug 2026 |
| Speary a - a Vaughn Usw B G-2-291941 | Burlington Resources O & G Co LP only | Sugarkane (Eagle Ford) | Karnes | 1 | 377K | 1.81M | Jan 2022 – Aug 2026 |
| Spear Reynolds C-a Ulw A O-2-12269 | Burlington Resources O & G Co LP only | Eagleville (Eagle Ford-2) | Karnes | 1 | 358K | 1.15M | Nov 2021 – Aug 2026 |
| Spearrs O-11-61939 | Peden Energy, Inc. only | Slaughter | Hockley | 1 | 270K | 318K | Jun 1993 – Aug 2026 |
| Speary Family Trust Unit A G-2-268979 | Burlington Resources O & G Co LP only | Sugarkane (Eagle Ford) | Karnes | 1 | 269K | 1.03M | Apr 2013 – Aug 2026 |
| Speary a - a Vaughn Usw A G-2-292043 | Burlington Resources O & G Co LP only | Sugarkane (Eagle Ford) | Karnes | 1 | 263K | 1M | Jan 2022 – Aug 2026 |
| Spear Point 1H O-1-18775 | Javelin Energy Partners Mgmt LLC only | Briscoe Ranch (Eagleford) | Frio | 1 | 250K | 91K | May 2016 – Aug 2026 |
| Spear Reynolds Unit A G-2-260033 | Burlington Resources O & G Co LP only | Sugarkane (Eagle Ford) | Karnes | 1 | 248K | 662K | Nov 2010 – Mar 2026 |
| Spearman-Alford Unit O-3-21823 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Burleson | 1 | 245K | 461K | by Jan 1993 – Jul 2026 |
| Spearman, Robt. "B" O-3-24263 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Burleson | 1 | 228K | 415K | Aug 2001 – Jul 2026 |
| Collard, Steele "A" O-14-7180 | Presidio Petroleum LLC only | Spearman, East (St. Louis) | Hansford | 2 | 204K | 124K | Jan 1997 – Aug 2026 |
| Speary Family Trust Unit A G-2-277728 | Burlington Resources O & G Co LP only | Sugarkane (Eagle Ford) | Karnes | 1 | 199K | 1.05M | Mar 2015 – Aug 2026 |
| Speary Family Trust Unit A G-2-277540 | Burlington Resources O & G Co LP only | Sugarkane (Eagle Ford) | Karnes | 1 | 192K | 1.16M | Mar 2015 – Aug 2026 |
| Spear O-8-27576 | Wallace Operating Company LLC only | Stephens County Regular | Stephens | 5 | 167K | 19.2K | Jun 1995 – Dec 2024 |
| Speary Family Trust Unit A G-2-277547 | Burlington Resources O & G Co LP only | Sugarkane (Eagle Ford) | Karnes | 1 | 153K | 607K | Mar 2015 – Aug 2026 |
| Speary Family Trust Unit A G-2-277538 | Burlington Resources O & G Co LP only | Sugarkane (Eagle Ford) | Karnes | 1 | 147K | 593K | Mar 2015 – Aug 2026 |
| Russell-Spears O-13-25164 | BKM Production only | Perrin, N. Afb (Baker SD) | Grayson | 2 | 139K | 587K | by Jan 1993 – Aug 2026 |
| Webb, Spearman O-13-3228 | Silver Creek Oil & Gas, LLC only | Webb (Oil Creek Sand) | Grayson | 3 | 136K | 112K | by Jan 1993 – Jan 2019 |
| Pinson Slaughter Unit O-2-8984 | P1 Energy, LLC only | Speary (Wilcox 9400) | Karnes | 2 | 125K | 194K | Jun 2005 – Aug 2026 |
| Spear O-7-8091 | Basa Resources, Inc. only | East Texas | Gregg | 2 | 106K | 601 | by Jan 1993 – Aug 2026 |
| Wallingford O-13-33046 | Speartip Energy, LLC only | Premonition (Barnett Shale) | Wilbarger | 1 | 98.4K | 91.9K | May 2014 – Aug 2026 |
| Spears, J. D. O-10-38166 | BCP Resources, LLC only | Signal Peak (Wolfcamp) | Howard | 2 | 96.2K | 38.5K | Apr 2007 – Aug 2026 |
| Forbes-Spears Unit O-13-28492 | Kadane Corporation only | Berry (Miss.) | Hardeman | 1 | 93K | 21 | by Jan 1993 – Oct 2017 |
| Angus Spear Tr., 2 O-7-6847 | Basa Resources, Inc. only | East Texas | Gregg | 2 | 90.7K | 6.37K | by Jan 1993 – Aug 2026 |
| Angus Spear Tr., 4&5 O-7-6848 | Basa Resources, Inc. only | East Texas | Gregg | 6 | 77.5K | 38.1K | by Jan 1993 – Aug 2026 |
| Spears O-13-25721 | Texoma Oil Tools, Inc. only | Young County Regular | Young | 5 | 74.7K | 35.3K | by Jan 1993 – Jul 2026 |
| Spears O-13-21930 | Cobra Oil & Gas Corporation only | Berry (Miss.) | Hardeman | 1 | 67.9K | 19 | by Jan 1993 – Aug 2026 |
| Rhodes Trust O-2-8828 | P1 Energy, LLC only | Speary (Wilcox 9400) | Karnes | 1 | 65K | 253K | Oct 2003 – Mar 2026 |
| Spearfish-Neal 27 O-10-42587 | Apache Corporation only | Spraberry (Trend Area) | Glasscock | 2 | 60.6K | 335K | Jan 2012 – Aug 2026 |
| Spearman 23 O-14-9760 | Seek Energy, LLC only | Hoover, NE (Virgil Lime) | Gray | 1 | 60.2K | 34.3K | Nov 2021 – Aug 2026 |
| Spearman, Robert F. "C" O-3-13264 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Burleson | 1 | 47.9K | 182K | by Jan 1993 – Aug 2024 |
| Steele-Collard O-14-7709 | Batton Oil & Gas, LLC only | Spearman,n.(lansing-Kansas City) | Hansford | 1 | 46.7K | 28.5K | Sep 2004 – Jul 2026 |
| University Lands 51/52 O-9-13008 | Speartip Energy, LLC only | Weger, SW. (Grayburg-San Andres) | Crockett | 2 | 45.1K | 47.1K | by Jan 1993 – Aug 2026 |
| Bolting, Georgia Faye et Al G-2-109550 | Marwell Petroleum Ltd Partnrship only | Speary, East (Wilcox 9800) | De Witt | 1 | 41.8K | 649K | by Jan 1993 – Aug 2026 |
| Spears, W.M. O-10-33815 | Partee Drilling Inc. only | Coahoma (Miss) | Howard | 1 | 41K | 156K | Apr 1993 – Jun 2026 |
| Spears-Mays O-6-12243 | Winchester Production Co., Ltd. only | Waskom (Sanders Sand) | Harrison | 1 | 40.9K | 112K | by Jan 1993 – Feb 2005 |
| Spearman, Robert "A" O-3-13787 | Chesapeake Operating, L.L.C. only | Giddings (Austin Chalk-3) | Burleson | 2 | 40.2K | 140K | by Jan 1993 – Jun 2019 |
| Pfluger, et Al O-9-6749 | Speartip Energy, LLC only | Weger (San Andres) | Crockett | 3 | 39.6K | 68.6K | by Jan 1993 – Aug 2026 |
| Spears, Mary J. O-8-23861 | Bellah & Mathiews only | Dick Scott (Mississippian) | Throckmorton | 3 | 34.1K | 9.61K | by Jan 1993 – Mar 2026 |
| McDuff O-13-33000 | Speartip Energy, LLC only | Premonition (Barnett Shale) | Wilbarger | 1 | 33.4K | 55.7K | Mar 2013 – Aug 2026 |
| Spearfish-Neal 27 O-10-41162 | Apache Corporation only | Jailhouse (Fusselman) | Glasscock | 1 | 33.2K | 47K | Mar 2011 – May 2015 |
| Steele-Collard O-14-7510 | Batton Oil & Gas, LLC only | Spearman, East (Cherokee) | Hansford | 1 | 30.2K | 277K | Jun 2004 – Jul 2026 |