| Simpson, W. M. G-13-260761 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 2.33K | 359K | Feb 2011 – Mar 2024 |
| Coble Shire A37 O-14-7700 | Latigo Petroleum Texas, LP only | Shire (Simpson) | Hutchinson | 1 | 2.3K | 1.6K | Sep 2006 – Nov 2006 |
| Gibbons G-8-115228 | Simpson Operating Services, LP only | Blind Hog (Caddo) | Eastland | 1 | 2.28K | 403K | Jan 1993 – Mar 2026 |
| Emperor "24" G-10-203835 | Permex Petroleum Corporation only | Emperor (Simpson) | Winkler | 1 | 2.22K | 1.51M | Jun 2004 – Nov 2025 |
| Simpson, L. M. T. Tract #3 O-13-29694 | XTO Energy Inc. only | Sherman (Ordovician 8,800) | Grayson | 1 | 2.09K | 6.04K | Oct 1999 – Nov 2009 |
| Hoover -H- O-9-1292 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 2.07K | 21 | Jan 1993 – Dec 2012 |
| Barker-Simpson G-13-227659 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 1.86K | 1.02M | Dec 2006 – Apr 2026 |
| Ida Simpson G-13-270174 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 1.86K | 254K | Mar 2013 – Apr 2019 |
| Halley, S. M. G-10-223158 | Chevron U. S. A. Inc. only | Emperor (Simpson) | Winkler | 1 | 1.75K | 1.89M | Feb 2006 – Dec 2014 |
| Argos O-10-52841 | Hilcorp Energy Company only | Emperor (Simpson) | Winkler | 1 | 1.66K | 3.52K | Feb 2019 – Apr 2019 |
| Simpson Unit O-13-29952 | Breeze Oil, LLC only | Toms (Ellenburger) | Montague | 1 | 1.58K | 0 | Oct 2001 – Oct 2004 |
| Scull 5-H O-9-8224 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 1 | 1.58K | 59 | Mar 1993 – Jul 2011 |
| Simpson G-2-227191 | Petro-Hunt, L.L.C. only | Runge, E. (Roeder) | De Witt | 1 | 1.51K | 59.4K | Apr 2007 – Feb 2008 |
| Pierce G-3-187338 | Dallas Production, Inc. only | Pheasant (Simpson) | Matagorda | 1 | 1.49K | 164K | Aug 2001 – May 2003 |
| Simpson, W. M. G-13-80870 | BKV Barnett, LLC only | Boonsville (Bend Congl., Gas) | Wise | 1 | 1.48K | 387K | Jan 1993 – Apr 2026 |
| Byars, M. O-13-17610 | Hoco, Inc. only | Harrold (Simpson) | Wilbarger | 2 | 1.46K | 20 | Jan 1995 – Aug 2001 |
| Harvey Renger Gas Unit G-2-274357 | Merit Energy Company only | Speaks, SW. (Simpson) | Lavaca | 1 | 1.3K | 80.4K | May 2014 – Apr 2026 |
| Simpson O-13-32524 | Oakridge Oil and Gas, LP only | KRS (Marble Falls) | Jack | 1 | 1.29K | 38K | Apr 2013 – Mar 2018 |
| Daniel, M. K. 'A' G-1-177155 | Tema Oil and Gas Company only | Simpson-Mann (Canyon) | Val Verde | 1 | 1.29K | 8.03K | Apr 2000 – Jun 2001 |
| Simpson G-4-222290 | Rlu Operating, LLC only | Samano (Fourth Massive) | Starr | 1 | 1.26K | 113K | Jun 2006 – Nov 2017 |
| Simpson O-13-4486 | Walsh & Watts, Inc. only | Engle (Strawn) | Montague | 2 | 1.23K | 1.2K | Jan 1993 – Apr 1995 |
| Benton-Simpson O-3-19119 | Coleman Oil & Gas Corp. only | Giddings (Austin Chalk-3) | Burleson | 1 | 1.23K | 14 | Jan 1993 – Nov 1995 |
| Parnell G-8-143313 | Simpson Operating Services, LP only | Blind Hog (Ranger) | Eastland | 1 | 1.23K | 689K | Jan 1993 – Mar 2026 |
| Simpson, W. M. G-13-260753 | Devon Energy Production Co, L.P. only | Newark, East (Barnett Shale) | Wise | 1 | 1.19K | 148K | Feb 2011 – Dec 2014 |
| Simpson -15- O-10-1341 | LDF Energy, LLC only | Emperor, Deep | Winkler | 1 | 1.13K | 121 | Jan 1993 – Oct 2019 |
| Gulf-Simpson G-13-134346 | Quest Petroleum Company only | Plemons (4250) | Jack | 1 | 1.05K | 90.4K | Jan 1993 – Aug 2019 |
| Simpson O-13-33977 | Perry Operating Inc. only | Senate (Miss.) | Jack | 1 | 1.03K | 0 | Oct 2019 – Apr 2026 |
| Migl-Mitchell G-2-170015 | Fowler Oil & Gas LLC only | Speaks, SW. (Simpson) | Lavaca | 1 | 989 | 6.11M | Jul 1998 – Nov 2004 |
| Freeman G-2-177964 | Fowler Oil & Gas LLC only | Speaks, SW. (Simpson) | Lavaca | 1 | 966 | 8.82M | May 2000 – Mar 2026 |
| M. K. Daniel 111A G-1-174866 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 954 | 1.28M | Oct 1999 – Apr 2026 |
| Freeman G-2-232717 | XTO Energy Inc. only | Speaks, SW. (Simpson) | Lavaca | 1 | 951 | 384K | Dec 2007 – Aug 2013 |
| Black, Hallie "3" G-1-169573 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 929 | 171K | Jul 1998 – Apr 2026 |
| Simpson-Benton Unit -A- O-3-14632 | Noel Operating, Inc. only | Giddings (Austin Chalk-3) | Burleson | 1 | 902 | 4.82K | Mar 1994 – Oct 1995 |
| Nunnally O-8-31351 | Simpson Operating Services, LP only | Blind (Duffer) | Eastland | 1 | 878 | 9.13K | Aug 2013 – Mar 2026 |
| Daniel, M. K. "A" G-1-258489 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Crockett | 1 | 867 | 141K | Nov 2010 – Oct 2025 |
| Simpson-Mann "C" O-9-12217 | Core Petro, LLC only | Atkinson, W. (San Angelo) | Tom Green | 1 | 811 | 32 | Jan 1993 – Apr 2026 |
| Stephens, C.G. O-8-14681 | Simpson Operating Services, LP only | Brown County Regular | Brown | 1 | 762 | 0 | Dec 2010 – Mar 2026 |
| Barker-Simpson G-13-231257 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 747 | 1.37M | Jun 2007 – Dec 2023 |
| Daniel, M. K. "112" Unit G-1-174167 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 721 | 193K | Jul 1999 – Apr 2026 |
| Crain & Griffith O-4-11972 | Southwest Oil & Land, Inc. only | Mercedes ( Simpson Sand) | Hidalgo | 1 | 674 | 20 | Jan 1993 – Dec 1994 |
| Simpson, Rhyne O-6-13026 | Young, Clint Inc. only | Lassater (Travis Peak) | Marion | 2 | 615 | 15 | Jan 1993 – Jun 1995 |
| Meadows G-1-166706 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Val Verde | 1 | 534 | 301K | Jan 1998 – Mar 2026 |
| Bragg O-9-9688 | Simpson Oil & Land Co. only | Douglas (Gardner Sd.) | Runnels | 1 | 532 | 32.1K | Jan 1993 – Mar 1997 |
| Meadows-State 10 G-1-160610 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Val Verde | 1 | 527 | 1.1M | Oct 1996 – Mar 2026 |
| Simpson, Ida G-13-110575 | Upham Oil & Gas Company only | Boonsville (Bend Congl., Gas) | Wise | 1 | 518 | 421K | Jan 1993 – Dec 2024 |
| Daniel, M. K. "113" G-1-169581 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 512 | 895K | Jun 1998 – Apr 2026 |
| Simpson, H.D. O-8-25504 | Scout Energy Management LLC only | White Flat (Strawn) | Nolan | 1 | 502 | 732 | Jan 1993 – Nov 2005 |
| Daniel, M. K. G-1-162042 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Val Verde | 1 | 500 | 901K | Mar 1997 – Oct 2025 |
| Barker-Simpson G-13-233865 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 477 | 628K | Sep 2007 – May 2019 |
| Simpson, Ida, Mrs. G-13-29281 | Upham Oil & Gas Company only | Boonsville (Bend Congl., Gas) | Wise | 1 | 475 | 238K | Jan 1993 – Apr 2026 |