| Hammond O-11-67710 | R2Q Operating LLC only | Salisbury (L. Leonard Sd.) | Gaines | 4 | 381K | 366K | Mar 1997 – Aug 2026 |
| Pierce, Reuben O-6-13469 | Diversified Production LLC only | Waskom (Hammond Sand) | Harrison | 2 | 151K | 463K | Oct 1995 – Aug 2026 |
| Williams, Ireland Oil Unit O-6-15689 | Diversified Production LLC only | Waskom (Hammond Sand) | Harrison | 2 | 96K | 337K | Jun 2019 – Aug 2026 |
| Hammond, J. W., -A- O-8-8161 | Quail Well Service, Inc. only | Taylor County Regular | Taylor | 1 | 69.8K | 21 | by Jan 1993 – May 2026 |
| Hammond, Ada E. -B- O-1-4165 | Arrco Operating, LLC only | Hammond (San Miguel NO 4) | Zavala | 1 | 56.7K | 21 | by Jan 1993 – Aug 2026 |
| Hammonds O-6-3652 | CLR Secondary Recovery, LLC only | Bethany, NE. (Lime 3850) | Panola | 1 | 25.4K | 941 | by Jan 1993 – Dec 2022 |
| Hammond Estate G-6-227861 | Brookston Energy, Inc. only | Waskom (Cotton Valley) | Harrison | 1 | 21.1K | 447K | Nov 2006 – Aug 2026 |
| Ada Hammond Heirs O-1-14643 | Arrco Operating, LLC only | Hammond (San Miguel NO 4) | Zavala | 1 | 19K | 6.65K | Nov 2005 – May 2019 |
| Hammond G-5-241242 | Barrow-Shaver Resources Co. only | Red Oak (Dexter) | Leon | 1 | 18.9K | 1.44M | Dec 2006 – Nov 2011 |
| Hammonds, Francis O-6-11700 | Samson Lone Star, LLC only | Chapel Hill, NE. (Travis Peak) | Smith | 1 | 12.4K | 42.6K | Mar 1993 – Nov 2001 |
| Downer Unit O-6-13475 | Devon Energy Production Co, L.P. only | Waskom (Hammond Sand) | Harrison | 1 | 12K | 52.9K | Nov 1995 – May 2008 |
| Hammonds, Fred O-13-21189 | Enr Operating, LLC only | Main (Canyon) | Foard | 1 | 11.7K | 1 | Apr 1993 – Apr 2026 |
| Hammonds, Jack O-13-21670 | Henderson, Sam F. only | Joy, Northeast (Ellenburger) | Clay | 1 | 7.79K | 99 | by Jan 1993 – Mar 2001 |
| McLofflin Gas Unit G-6-292197 | Diversified Production LLC only | Waskom (Hammond Sand) | Harrison | 1 | 7.01K | 70.9K | Mar 2022 – Aug 2026 |
| Williams, Ireland Unit G-6-289486 | Diversified Production LLC only | Waskom (Hammond Sand) | Harrison | 1 | 6.32K | 113K | Jun 2020 – Aug 2026 |
| McMillian O-1-16714 | Alamo Operating Company, L. C. only | Hammond (San Miguel NO 4) | Zavala | 1 | 5.62K | 0 | Aug 2010 – Oct 2014 |
| Hammond Estate G-6-248723 | Brookston Energy, Inc. only | Waskom (Cotton Valley) | Harrison | 1 | 4.99K | 1.62M | Jan 2009 – Aug 2026 |
| Hammond Estate O-6-16196 | Brookston Energy, Inc. only | Waskom (Bell Zone) | Harrison | 1 | 4.05K | 20.3K | Jun 2026 – Aug 2026 |
| Hammond Unit G-13-268157 | Bedrock Production, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 3.79K | 280K | Jan 2013 – Mar 2016 |
| Hammond Estate G-6-142094 | Comstock Oil & Gas, LP only | Waskom (Cotton Valley) | Harrison | 1 | 3.17K | 656K | by Jan 1993 – Jun 2003 |
| Hammond, Ada E. -A- O-1-4148 | Roma Oil and Gas, Inc. only | Hammond (San Miguel NO 4) | Zavala | 2 | 2.98K | 22 | by Jan 1993 – Nov 2001 |
| Hammond Estate G-6-233530 | Brookston Energy, Inc. only | Waskom (Cotton Valley) | Harrison | 1 | 2.84K | 691K | Aug 2007 – Oct 2025 |
| Hammond, Ada O-1-12700 | Killam Oil Co., Ltd. only | Hammond (Anacacho) | Zavala | 1 | 2.31K | 18 | by Jan 1993 – Aug 1994 |
| Hammond Estate G-6-144724 | Comstock Oil & Gas, LP only | Waskom (Cotton Valley) | Harrison | 1 | 1.94K | 975K | Feb 1993 – Dec 2008 |
| Hammond Estate G-6-222603 | Brookston Energy, Inc. only | Waskom (Cotton Valley) | Harrison | 1 | 1.72K | 367K | Aug 2006 – Aug 2026 |
| Hammond Estate G-6-234949 | Brookston Energy, Inc. only | Waskom (Cotton Valley) | Harrison | 1 | 1.12K | 364K | Nov 2007 – Oct 2025 |
| Hammond G-14-89479 | Cambridge Production, Inc. only | Wheeler NW (Hunton) | Wheeler | 1 | 654 | 119K | by Jan 1993 – Jun 1997 |
| Hammond Estate G-6-140127 | Comstock Oil & Gas, LLC only | Waskom (Cotton Valley) | Harrison | 1 | 400 | 136K | by Jan 1993 – Jul 1997 |
| Hammond G-14-169698 | Cambridge Production, Inc. only | Wheeler, NW. (Woodford) | Wheeler | 1 | 201 | 15K | Apr 1998 – Mar 1999 |
| Hammond 203 O-10-35218 | Valley Resources, Inc. only | Oates | Pecos | 1 | 187 | 0 | Jan 1997 – Dec 1997 |
| Williams, Ireland Gas Unit G-6-291629 | Diversified Production LLC only | Waskom (Hammond Sand) | Harrison | 1 | 5 | 1.42K | Oct 2021 – Jan 2022 |
| Hammond Estate G-6-142043 | Sonat Exploration Company -Tyler only | Waskom (Travis Peak 7) | Harrison | 1 | 3 | 3 | May 1994 – May 1994 |
| Hammond, Ada -A- G-1-40719 | Killam Oil Co., Ltd. only | Hammond (Olmos Sand) | Zavala | 1 | 0 | 0 | — |
| Hammond, E.R. G-8-84175 | Eastland Operating, L.L.C. only | Liberty Oak (Big Saline) | Erath | 1 | 0 | 159K | by Jan 1993 – Oct 2022 |
| Hammond, Ada G-1-43738 | Williamson Operating Co. only | Hammond (Olmos Sand) | Zavala | 1 | 0 | 0 | — |
| Hammond, Ada E. -A- G-1-53395 | Williamson Operating Co. only | Hammond (Olmos Sand) | Zavala | 1 | 0 | 0 | — |
| Hammond, Ada G-1-76951 | Killam Oil Co., Ltd. only | Hammond (Olmos Sand) | Zavala | 1 | 0 | 59.8K | by Jan 1993 – Jan 1999 |
| Hammond -A- G-1-101429 | Williamson Operating Co. only | Hammond (Olmos '5') | Zavala | 1 | 0 | 0 | — |
| Hammond, Ada Heirs G-1-229628 | Sanchez Oil & Gas Corporation only | Hammond (Olmos Sand) | Zavala | 1 | 0 | 62.7K | Jul 2007 – Apr 2009 |
| Hammond Estate G-6-78593 | Sonat Exploration Company -Tyler only | Waskom (Cotton Valley) | Harrison | 1 | 0 | 0 | — |
| Hammond Estate G-6-220964 | Comstock Oil & Gas, LP only | Waskom (Travis Peak 3) | Harrison | 1 | 0 | 0 | — |
| Hammond Estate G-6-246566 | Comstock Oil & Gas, LP only | Waskom (Travis Peak 7) | Harrison | 1 | 0 | 617K | Jan 2009 – Jan 2013 |
| Downer Unit G-6-249709 | Devon Energy Production Co, L.P. only | Waskom (Hammond Sand) | Harrison | 1 | 0 | 1 | Jan 2013 – Jan 2013 |
| Hammond, E.R. G-8-88784 | Swaim, Charles only | Liberty Oak (Big Saline) | Erath | 1 | 0 | 5.89K | Dec 2000 – Aug 2018 |
| Hammond, E.R. G-8-88785 | Swaim, Charles only | Liberty Oak (Big Saline) | Erath | 1 | 0 | 7.15K | Dec 2000 – Aug 2018 |
| Hammond,l.p. G-8-100870 | Concho Products only | Desdemona,n. (Bend Conglomerate) | Eastland | 1 | 0 | 0 | — |
| Hammond G-13-79193 | Raylee Operating Company only | Cary-Mag, South (Conglomerate) | Jack | 1 | 0 | 0 | — |
| Johnson-Hammonds G-13-158370 | Mid-Continental Exploration,inc. only | Thalia (Tannehill) | Foard | 1 | 0 | 57K | Mar 1996 – Jul 2000 |
| Johnson-Hammonds G-13-160098 | Blackbrush O & G, LLC only | Thalia (Wichita Falls) | Foard | 1 | 0 | 304K | Sep 1996 – Jan 2024 |
| Wylie, Fred -E- O-8-432 | Hammonds & Gardner Operators only | Callahan County Regular | Callahan | 4 | 0 | 0 | — |