| Simpson Smith 0844 A O-10-54058 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 1 | 690K | 766K | Jan 2020 – Jul 2026 |
| Simpson O-11-67480 | Salida Exploration, LLC only | Bacon 107 (Tannehill) | King | 7 | 671K | 0 | Dec 1995 – Jul 2026 |
| Simpson Canyon 3027 Unit O-9-15966 | Surge Solutions, Inc. only | Bluegrass (Wolfcamp) | Crockett | 1 | 397K | 269K | Jan 2006 – Jul 2026 |
| Simpson Canyon 1028 Unit O-9-15742 | Surge Solutions, Inc. only | Bluegrass (Wolfcamp) | Crockett | 1 | 360K | 197K | Oct 2004 – Jul 2026 |
| Lockhart O-10-31036 | Winn Operating, LLC only | Martin (Second Simpson Sd.) | Andrews | 1 | 352K | 89.9K | Jan 1993 – Jul 2026 |
| Simpson Smith E 08-44 O-10-59893 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 1 | 329K | 752K | Jun 2023 – Jul 2026 |
| Simpson Smith B 08-44 O-10-59894 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 1 | 312K | 515K | Jun 2023 – Jul 2026 |
| Simpson Smith a 08-44 O-10-60241 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 1 | 299K | 686K | Jun 2023 – Jul 2026 |
| Simpson Smith D 08-44 O-10-60242 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 1 | 279K | 459K | Jun 2023 – Jul 2026 |
| Simpson Canyon 1045 Unit O-9-15613 | MLC Operating, LP only | Bluegrass (Wolfcamp) | Crockett | 4 | 259K | 26.8K | May 2004 – Jul 2026 |
| Simpson Canyon 5027 Unit O-9-15982 | Surge Solutions, Inc. only | Bluegrass (Wolfcamp) | Crockett | 1 | 257K | 182K | May 2006 – Jul 2026 |
| Simpson Smith C 08-44 O-10-60243 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 1 | 248K | 467K | Jun 2023 – Jul 2026 |
| Simpson O-3-21075 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Lee | 2 | 197K | 980K | Jan 1993 – Jul 2026 |
| Wolf-Simpson Unit O-3-14814 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Lee | 2 | 181K | 530K | Jan 1993 – Jul 2026 |
| Simpson Canyon 2044 Unit O-9-15894 | Surge Solutions, Inc. only | Bluegrass (Wolfcamp) | Crockett | 1 | 167K | 167K | Dec 2005 – Jul 2026 |
| Simpson O-10-34101 | Diamondback E&P LLC only | Spraberry (Trend Area) | Midland | 2 | 152K | 314K | Mar 1994 – Jul 2026 |
| Simpson O-11-66854 | Creed Operating Co., LLC only | Bee Wright (Tannehill) | King | 9 | 150K | 47 | Jan 1993 – Jul 2026 |
| Simpson Canyon 1044 Unit O-9-15790 | Surge Solutions, Inc. only | Bluegrass (Wolfcamp) | Crockett | 1 | 133K | 9.06K | Aug 2005 – Jul 2026 |
| Miller-Koonsman P. U. "A" O-11-68145 | Robert C. Brower, LLC only | Gordon Simpson (Strawn) | Garza | 1 | 124K | 57.5K | Nov 1999 – Jul 2026 |
| Simpson Canyon 3045 Unit O-9-15850 | Surge Solutions, Inc. only | Bluegrass (Wolfcamp) | Crockett | 1 | 122K | 84.9K | May 2005 – Jul 2026 |
| Simpson Canyon 2043 Unit O-9-15938 | Surge Solutions, Inc. only | Bluegrass (Wolfcamp) | Crockett | 1 | 122K | 30.2K | Mar 2006 – Jul 2026 |
| Simpson Canyon 3044 Unit O-9-15988 | Surge Solutions, Inc. only | Bluegrass (Wolfcamp) | Crockett | 1 | 120K | 15.3K | Jul 2006 – Jul 2026 |
| Simpson "D" O-6-10933 | Buffco Production Inc. only | Avinger (Pettit) | Cass | 3 | 112K | 27.1K | Jan 1993 – Aug 2018 |
| Simpson Canyon 103 Unit O-9-15861 | Caths Oil & Gas only | Bluegrass (Leonard) | Crockett | 1 | 111K | 242K | Oct 2005 – Jul 2026 |
| Simpson, H. D. O-8-3060 | Scout Energy Management LLC only | White Flat | — | 1 | 104K | 44.3K | Jan 1993 – Jul 2026 |
| Simpson O-11-67814 | Salida Exploration, LLC only | One Joint Off (Tannehill) | King | 5 | 102K | 0 | Oct 1997 – Jul 2026 |
| Simpson O-11-67246 | Creed Operating Co., LLC only | Bee Wright (Tannehill, Upper) | King | 1 | 101K | 6 | Apr 1994 – Jul 2026 |
| Simpson Canyon 2045 Unit O-9-15741 | Surge Solutions, Inc. only | Bluegrass (Wolfcamp) | Crockett | 2 | 90.9K | 1.7K | Oct 2004 – Jul 2026 |
| Simpson Canyon 4027 Unit O-9-15922 | Surge Solutions, Inc. only | Bluegrass (Wolfcamp) | Crockett | 1 | 89.9K | 66.4K | Feb 2006 – Jul 2026 |
| Simpson Canyon O-9-15573 | Surge Solutions, Inc. only | T-4 Ranch (Wolfcamp) | Crockett | 3 | 89.5K | 83 | Oct 2003 – Jul 2026 |
| Simpson -B- O-10-25755 | Unitex Oil & Gas, L.L.C. only | Coleman Ranch, N. (Clear Fork) | Mitchell | 5 | 89.4K | 19 | Jan 1993 – Jul 2026 |
| Simpson "G" O-2-6606 | Mandarin Oil & Gas Company only | Pridham Lake (Catahoula) | Victoria | 6 | 84.4K | 199 | Jan 1993 – Jul 2026 |
| Simpson O-11-66149 | MWL Energy LLC only | Edwards Bluff (Tannehill) | King | 2 | 78.4K | 3.19K | Jan 1993 – Jul 2026 |
| Coble 64 O-14-7492 | Palo Duro Resources LLC only | Shire (Simpson) | Hutchinson | 1 | 73.3K | 20.3K | Jan 2004 – Jul 2026 |
| Nunnally O-8-28595 | Simpson Operating Services, LP only | Blind Hog (Ranger) | Eastland | 3 | 55.2K | 138K | Jan 1999 – Jul 2026 |
| Waller O-9-16627 | Simpson Operating Services, LP only | Ballinger, West (Morris SD) | Runnels | 2 | 53.9K | 185K | Apr 2007 – Jul 2026 |
| Simpson Canyon 2027 Unit O-9-15880 | Surge Solutions, Inc. only | Bluegrass (Wolfcamp) | Crockett | 2 | 53K | 28.4K | Dec 2005 – Jul 2026 |
| Simpson, Akin -A- O-10-7096 | Platinum Exploration Inc. only | Vealmoor | Howard | 2 | 52.1K | 126K | Jan 1993 – Jul 2026 |
| Simpson Canyon 5045 Unit O-9-15867 | Surge Solutions, Inc. only | Bluegrass (Wolfcamp) | Crockett | 1 | 52K | 1.47K | Nov 2005 – Jul 2026 |
| Parks-Koonsman O-11-63539 | Robert C. Brower, LLC only | Gordon Simpson (Spraberry) | Garza | 2 | 50.9K | 8.64K | Jan 1993 – Jul 2026 |
| Simpson, V. P. O-8-18933 | King Energy Resources only | Hawk Eye (Adams Branch) | Eastland | 22 | 49.1K | 21 | Jan 1993 – Jul 2026 |
| Maxwell 14 O-10-37309 | Permex Petroleum Corporation only | Emperor (Simpson) | Winkler | 1 | 46.2K | 1.68M | May 2003 – Jul 2026 |
| Simpson Canyon 1027 Unit O-9-16082 | Surge Solutions, Inc. only | Bluegrass (Clearfork) | Crockett | 1 | 44.9K | 2.44K | May 2006 – Jul 2026 |
| Simpson "D" O-6-15604 | Buffco Production Inc. only | Lake Ferrell (Pettit, Upper) | Cass | 1 | 44.5K | 0 | Jun 2016 – Jul 2026 |
| Alcorn, J. O-13-1621 | DWP Oil & Gas only | Alcorn (Simpson Lime) | — | 2 | 44.4K | 35 | Jan 1993 – Jul 2026 |
| Parker, J. E. O-10-29399 | Hilcorp Energy Company only | Martin (Second Simpson Sd.) | Andrews | 2 | 42K | 84.4K | Jan 1993 – Jul 2026 |
| Emperor "12" O-10-39502 | EOG Resources, Inc. only | Emperor (Simpson) | Winkler | 1 | 41.9K | 884K | Mar 2009 – Jul 2026 |
| Holt-Eisenhauer A O-14-7185 | Conocophillips Company only | Munchi (Simpson) | Hutchinson | 1 | 39.8K | 5.19K | Dec 1996 – Mar 2005 |
| Koonsman 678 O-11-67297 | Raw Oil & Gas, Inc. only | Gordon Simpson (Strawn) | Garza | 1 | 39.2K | 3.11K | Sep 1994 – Feb 2005 |
| Maxwell 13 O-10-37310 | Chevron U. S. A. Inc. only | Emperor (Simpson) | Winkler | 1 | 38.9K | 758K | May 2003 – Nov 2021 |