| Williamson, Iona O-11-67064 | Crossroads Operating, LLC only | Diamond -M- (Clear Fork) | Scurry | 18 | 318K | 31.5K | Apr 1993 – Apr 2026 |
| Williamson San Andres Unit O-10-23996 | Baker Operating, Inc. only | Goldsmith, W. (San Andres) | Ector | 27 | 300K | 808K | Jan 1993 – Apr 2026 |
| Williamson, J.M. O-10-41797 | Aghorn Operating, Inc. only | Martin (Consolidated) | Ector | 23 | 286K | 509K | Aug 2011 – Feb 2026 |
| Williamson, Carl Estate O-13-16790 | Felty Drilling Co. Inc only | Wichita County Regular | Wichita | 19 | 237K | 21 | Jan 1993 – Apr 2026 |
| Crozier Williamson Unit O-1-16122 | Magnolia Oil & Gas Operating LLC only | Eagleville (Eagle Ford-1) | Gonzales | 1 | 230K | 237K | Sep 2012 – Apr 2026 |
| Williamson, J. M. "A" O-10-33083 | Raptor Resources, Inc. only | Goldsmith, W. (San Andres) | Ector | 6 | 199K | 228K | Jan 1993 – Apr 2026 |
| Williamson, Jessie O-10-36547 | Baker Operating, Inc. only | TXL (Devonian) | Ector | 2 | 149K | 429K | Sep 1999 – Apr 2026 |
| Williamson 85 O-13-25851 | McCauley Production only | Wichita County Regular | Wichita | 3 | 91.3K | 21 | Jan 1993 – Apr 2026 |
| Williamson G-3-176024 | Timberwolf Energy, Inc. only | Angleton, S. (F-4 FB-AZ) | Brazoria | 1 | 84.2K | 3.1M | Jan 2000 – Mar 2026 |
| Williamson, Jessie Mae O-10-31654 | Baker Operating, Inc. only | G & W (Wolfcamp) | Ector | 1 | 80.6K | 125K | Jan 1993 – Apr 2026 |
| Williamson -B- O-13-17507 | R2Q Operating LLC only | Wichita County Regular | Wichita | 7 | 71.2K | 23 | Jan 1993 – Feb 2026 |
| Williamson O-10-18600 | Satanta Oil Company only | Goldsmith, N. (San Andres, Con.) | Ector | 4 | 68.4K | 292K | Jan 1993 – Apr 2026 |
| Williamson, J. M. O-10-18605 | Saga Petroleum LLC of Colorado only | Goldsmith, N. (San Andres, Con.) | Ector | 9 | 64.7K | 164K | Jan 1993 – May 2013 |
| Ipc O-6-12323 | Williamson Operating Co., LLC only | Rodessa (Huffins-Hill) | Cass | 1 | 64.2K | 9.25K | Jan 1993 – Mar 2026 |
| Whiteside, R. G. et Al O-6-11949 | Williamson Oil & Gas, Inc. only | Woodlawn (Hill) | Harrison | 1 | 63.3K | 2.78K | Jan 1993 – Jan 2008 |
| Williamson, Jessie Mae -A- O-10-18714 | Petex only | TXL (Devonian) | Ector | 1 | 58.5K | 423K | Jan 1993 – Apr 2026 |
| Williamson O-6-15505 | Machin & Associates, Inc. only | Iron Lake | Cass | 3 | 47.3K | 0 | Aug 2016 – Mar 2026 |
| Williamson-Boyd Unit O-8-29399 | Sojourner Drilling Corporation only | Noodlekirk (Ellenburger) | Jones | 1 | 45.5K | 27.4K | Mar 2004 – Oct 2012 |
| Williamson-Boyd Unit O-8-31127 | Sojourner Drilling Corporation only | Jones County Regular | Jones | 1 | 44.1K | 56.8K | Nov 2012 – Apr 2026 |
| Williamson, Wanda O-8-29897 | Boaz Energy II Operating, LLC only | White Flat | Nolan | 2 | 39K | 15.8K | Apr 2007 – Aug 2023 |
| Williamson, et Al G-3-193463 | Timberwolf Energy, Inc. only | Angleton, South (12,100 Frio) | Brazoria | 1 | 38K | 1.16M | Nov 2002 – Mar 2026 |
| Williamson, Jessie May O-10-18623 | Raptor Resources, Inc. only | Goldsmith, N. (San Andres, Con.) | Ector | 8 | 38K | 283K | Jan 1993 – Apr 2026 |
| Alta-Williamson -A- O-10-31509 | Phoenix Hydrocarbons Operating only | Goldsmith (5600) | Ector | 2 | 34.3K | 63.2K | Jan 1993 – Oct 2006 |
| Hoggard Unit O-13-29377 | Ridge Oil Company only | Williamson | Young | 1 | 34.1K | 0 | Aug 1997 – Mar 2002 |
| Williamson, J. M. O-10-24466 | Whiting Oil and Gas Corporation only | Flying "W", S.E. (Wolfcamp) | Winkler | 2 | 32.5K | 21 | Jan 1993 – Jun 2004 |
| Williamson, Jessie A O-10-35991 | Baker Operating, Inc. only | TXL (Devonian) | Ector | 1 | 30.9K | 60.3K | Apr 1999 – Apr 2021 |
| Williamson G-6-209230 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 30K | 1.9M | Jan 2005 – Apr 2026 |
| Williamson, Jessie O-10-38073 | Baker Operating, Inc. only | Andector (Wichita Albany) | Ector | 1 | 28.2K | 130K | Dec 2006 – Apr 2026 |
| Williamson -B- O-10-31568 | Jay Management Company, LLC only | Goldsmith, N. (San Andres, Con.) | Ector | 1 | 28K | 47.3K | Jan 1993 – Apr 2026 |
| Williamson, Stanley H. G-4-145890 | EOG Resources, Inc. only | Cinco Compadres (Lobo) | Webb | 1 | 26.6K | 4.3M | Feb 1993 – Mar 2011 |
| Williamson-Retrieve Unit No. 1 G-3-130811 | Wing Corporation only | Angleton, S. (F-4 FB-AZ) | Brazoria | 1 | 23.8K | 2.02M | Jan 1993 – Feb 1999 |
| BB Unit O-13-29357 | Ridge Oil Company only | Williamson | Young | 1 | 23.7K | 0 | Jul 1997 – Dec 2002 |
| Williamson, J. M. -B- O-10-18624 | Brock, J. only | Goldsmith, N. (San Andres, Con.) | Ector | 3 | 23.5K | 10.6K | Jan 1993 – Sep 2013 |
| Williamson, Iona O-11-11084 | Anadarko Petroleum Corporation only | Revilo (Glorieta) | Scurry | 12 | 22.4K | 2.77K | Jan 1993 – Nov 2000 |
| Williamson, Jessie, -A- O-10-16330 | Baker Operating, Inc. only | Goldsmith, W. (San Andres) | Ector | 2 | 21.8K | 182K | Jan 1993 – Apr 2026 |
| Williamson G-3-94897 | Wing Corporation only | Angleton, S. (Frio 13 FB-B) | Brazoria | 1 | 21.6K | 934K | Jan 1993 – Nov 1999 |
| Williamson -B- O-10-31772 | Phoenix Hydrocarbons Operating only | Goldsmith (5600) | Ector | 1 | 20.1K | 45.1K | Jan 1993 – Oct 2006 |
| Williamson Oil Unit O-6-14524 | Diversified Production LLC only | Carthage (Travis Peak) | Panola | 2 | 18.9K | 171K | Mar 2006 – Apr 2026 |
| Wedgeworth et Al-Williamson G-6-294451 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 18.9K | 2.8M | Jan 2023 – Apr 2026 |
| Williamson G-3-158703 | Timberwolf Energy, Inc. only | Angleton, S. (Frio 13 FB-C) | Brazoria | 1 | 18.9K | 913K | Apr 1996 – Sep 2004 |
| Williamson G-6-178787 | Sheridan Production Company, LLC only | Carthage (Cotton Valley) | Panola | 1 | 17.7K | 953K | Jun 2000 – Aug 2019 |
| Williamson O-8-29995 | Sojourner Drilling Corporation only | Noodle (Palo Pinto) | Jones | 3 | 17.4K | 49.4K | Aug 2007 – Jul 2016 |
| Alta-Williamson -A- O-10-37973 | Jay Management Company, LLC only | Goldsmith (Clear Fork) | Ector | 2 | 17K | 22.4K | Nov 2006 – Apr 2026 |
| Williamson "C" O-10-23556 | Jay Management Company, LLC only | G & W (Wolfcamp) | Ector | 1 | 16.6K | 3.57K | Jan 1993 – Apr 2026 |
| Williamson, Jessie O-10-39299 | Baker Operating, Inc. only | Goldsmith, East (Clear Fork LO) | Ector | 1 | 16.4K | 37K | Dec 2008 – Apr 2026 |
| Williamson G-6-203670 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 16.3K | 2.29M | Jul 2004 – Apr 2026 |
| Williamson, Iona O-11-9034 | Crossroads Operating, LLC only | Kelly-Snyder (Clear Fork, Lower) | Scurry | 3 | 16.3K | 613 | May 2007 – Jan 2016 |
| Williamson G-6-110325 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 16.3K | 2.15M | Jan 1993 – Apr 2026 |
| Williamson G-3-224124 | Timberwolf Energy, Inc. only | Angleton, S. (F-4 FB-AZ) | Brazoria | 1 | 15.6K | 150K | Jun 2005 – Mar 2026 |
| Williamson, Jessie O-10-10669 | Baker Operating, Inc. only | Goldsmith, W. (San Andres) | Ector | 4 | 14.6K | 354K | Jan 1993 – Jul 2019 |