| Oldham Trust West O-10-49790 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 11 | 2.53M | 5.14M | Oct 2017 – Mar 2026 |
| Oldham Trust East O-10-51706 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 8 | 1.84M | 3M | Jun 2019 – Mar 2026 |
| Oldham 38-27 B Unit O-10-54008 | Highpeak Energy Holdings, LLC only | Spraberry (Trend Area) | Howard | 4 | 896K | 1.28M | Apr 2020 – Apr 2026 |
| Oldham Trust West Unit 25-41 O-10-59619 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 2 | 577K | 1.03M | Oct 2022 – Mar 2026 |
| Oldham, Ida Mae, -D- O-10-16295 | Diamondback E&P LLC only | Spraberry (Trend Area) | Midland | 16 | 566K | 1.2M | Jan 1993 – Mar 2026 |
| Oldham, Ida Mae, -C- O-10-16417 | Diamondback E&P LLC only | Spraberry (Trend Area) | Midland | 12 | 380K | 985K | Jan 1993 – Oct 2021 |
| Oldham Trust West Long 25-56 O-10-59911 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 1 | 329K | 654K | Oct 2022 – Mar 2026 |
| Oldham, Ida Mae, -B- O-10-16486 | Diamondback E&P LLC only | Spraberry (Trend Area) | Midland | 7 | 256K | 463K | Jan 1993 – Apr 2026 |
| Oldham-Graham 35F O-10-55895 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 240K | 535K | Jul 2021 – Apr 2026 |
| Oldham-Graham 35E O-10-55706 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 206K | 475K | Jul 2021 – Apr 2026 |
| Oldham-Graham 35C O-10-55698 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 205K | 700K | Jul 2021 – Apr 2026 |
| Oldham, D. M., Jr., Etal O-9-1428 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Upton | 2 | 189K | 235K | Jan 1993 – Jan 2019 |
| Oldham-Graham 35B O-10-55697 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 181K | 808K | Jul 2021 – Apr 2026 |
| Penrose-Oldham "27" O-10-27471 | Endeavor Energy Resources L.P. only | Mid-Mar, East (Fusselman) | Midland | 4 | 180K | 99.9K | Jan 1993 – Jan 2015 |
| Oldham-Graham 35D O-10-55699 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 179K | 693K | Jul 2021 – Apr 2026 |
| Oldham-Graham 35A O-10-55715 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 166K | 508K | Jul 2021 – Apr 2026 |
| Oldham, Ida Mae, -E- O-10-16690 | Diamondback E&P LLC only | Spraberry (Trend Area) | Midland | 5 | 132K | 417K | Jan 1993 – Jul 2021 |
| Oldham -C- O-10-29044 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 111K | 238K | Jan 1993 – Mar 2020 |
| Oldham O-13-186 | Chek Oil Co., LLC only | Archer County Regular | Archer | 15 | 77.6K | 21 | Jan 1993 – Apr 2026 |
| Oldham O-13-25642 | Chek Oil Co., LLC only | Archer County Regular | Archer | 5 | 74.2K | 46 | Jan 1993 – Apr 2026 |
| Oldham O-10-28791 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 58.2K | 173K | Jan 1993 – Feb 2006 |
| Verwold-Oldham O-3-17352 | Anadarko E&P Company LP only | Giddings (Austin Chalk-3) | Burleson | 1 | 44K | 79.3K | Jan 1993 – Mar 2006 |
| Penrose Oldham "27" O-10-38078 | Diamondback E&P LLC only | Mid-Mar, East (Strawn) | Midland | 2 | 41.1K | 83K | Jan 2007 – Jun 2025 |
| Penrose-Oldham O-10-37659 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 38.8K | 62.7K | Dec 2005 – Oct 2022 |
| Oldham O-10-45747 | Rock Fish Operating LLC only | Azalea (San Andres) | Midland | 1 | 31.9K | 0 | Aug 2014 – Apr 2026 |
| Oldham "B" O-10-29075 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 24.9K | 80.7K | Jan 1993 – Jan 1999 |
| Oldham Trust 26 O-10-47055 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 1 | 20.7K | 15.7K | Jan 2015 – Feb 2019 |
| Oldham Trust 38 O-10-47056 | Highpeak Energy Holdings, LLC only | Spraberry (Trend Area) | Howard | 1 | 18.9K | 82.6K | Nov 2014 – Jan 2020 |
| Oldham -A- O-10-28734 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 17.7K | 82K | Jan 1993 – Nov 1998 |
| McFarland, Eddie Wayne O-6-13359 | Supreme Energy Company, Inc. only | Oldham (Rodessa, Lo.) | Smith | 1 | 15.4K | 217K | Dec 1994 – Apr 2026 |
| Oldham, Ida Mae "D" O-10-38919 | Energen Resources Corporation only | Mid-Mar, East (Strawn) | Midland | 1 | 13.7K | 41K | Nov 2008 – Jun 2009 |
| Penrose-Oldham -A- O-10-21373 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 13.1K | 41.5K | Jan 1993 – Jun 1997 |
| Oldham, Penrose, #2 O-10-20597 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 12.6K | 23.4K | Jan 1993 – Nov 1998 |
| Oldham Trust 27 O-10-47122 | Highpeak Energy Holdings, LLC only | Spraberry (Trend Area) | Howard | 1 | 9.48K | 15.5K | Feb 2015 – Jan 2020 |
| Oldham Trust 27 O-10-45575 | Highpeak Energy Holdings, LLC only | Big Spring (Strawn) | Howard | 1 | 8.69K | 37.5K | May 2014 – Jan 2020 |
| Penrose-Oldham -34- O-10-31538 | Endeavor Energy Resources L.P. only | Mid-Mar, East (Strawn) | Midland | 1 | 7.28K | 33.4K | Jan 1993 – Mar 2002 |
| Oldham O-10-30089 | Finley Resources, Inc. only | Griffin (Penn Reef) | Howard | 2 | 6K | 21 | Jan 1993 – Apr 1996 |
| Oldham -D- O-10-28875 | Parker & Parsley Development L.P only | Spraberry (Trend Area) | Midland | 1 | 5.04K | 7.63K | Jan 1993 – Feb 1995 |
| Oldham-Mallet O-11-65824 | Yucca Energy, Inc. only | Slaughter | Cochran | 2 | 1.47K | 640 | Jan 1993 – Oct 1994 |
| Oldham O-10-36462 | Energen Resources Corporation only | Azalea (Devonian) | Midland | 1 | 1.45K | 13.4K | Nov 2000 – Mar 2002 |
| Oldham O-10-29283 | Energen Resources Corporation only | Mid-Mar, East (Fusselman) | Midland | 2 | 677 | 0 | Jan 2000 – Mar 2000 |
| Penrose-Oldham "27" O-10-37015 | Diamondback E&P LLC only | Azalea (Devonian) | Midland | 1 | 605 | 679 | Dec 2001 – Dec 2005 |
| Oldham, Ida Mae, "D" O-10-36021 | Energen Resources Corporation only | Spraberry (Trend Area CL. Fk.) | Midland | 1 | 590 | 29 | Jun 1999 – Jul 2000 |
| Oldham, Ida Mae -A- G-10-19552 | Energen Resources Corporation only | Azalea (Devonian) | Midland | 1 | 444 | 212K | Jan 1993 – Jun 1997 |
| Oldham-Atwood Unit G-13-119517 | Gerry-Mac Oil, Inc. only | Bunger, SW. (Bend 3900) | Young | 1 | 347 | 25.4K | Jan 1993 – Mar 2014 |
| Oldham, Ida Mae -D- O-10-24933 | EP Operating Limited Partnership only | Spraberry(trend Area Dean-Wlfcp) | Midland | 1 | 192 | 219 | Jan 1993 – Feb 1993 |
| Oldham, S. E. O-13-198 | Bastrop Oil & Gas, Inc. only | Archer County Regular | Archer | 4 | 164 | 23 | Jan 1993 – Dec 1995 |
| Oldham G-13-119521 | Gerry-Mac Oil, Inc. only | Herron Bend (Strawn, West) | Young | 1 | 88 | 8.09K | Jan 1993 – Mar 2014 |
| Oldham Little Church G-2-220548 | American Energy Partners, Inc. only | Provident City (4000, East) | Colorado | 1 | 23 | 127K | Feb 2006 – Dec 2008 |
| Oldham Little Church Foundation G-2-219468 | American Energy Partners, Inc. only | Provident City, East (Frio 3650) | Lavaca | 1 | 0 | 81.7K | Oct 2005 – Dec 2007 |