| Heard, Claude E. et Al O-2-1798 | Hilcorp Energy Company only | Tom Oconnor (4400) | Refugio | 19 | 760K | 407K | by Jan 1993 – Apr 2026 |
| Heard, Claude E., Etal O-2-2584 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 7 | 196K | 433K | by Jan 1993 – Mar 2011 |
| Heard, Claude E., et Al O-2-1539 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 12 | 163K | 369K | by Jan 1993 – Jan 2023 |
| Ashby, Claude O-7-8450 | Linder, John Operating Co., LLC only | East Texas | Rusk | 1 | 115K | 0 | Apr 1995 – Apr 2026 |
| Heard, Claude E. et Al O-2-9330 | Hilcorp Energy Company only | Tom Oconnor, N. (5150) | Refugio | 3 | 83.3K | 21.8K | Jun 2009 – Apr 2026 |
| Williams, Claude O-6-11355 | MHM Pipeline Co., Inc. only | Sherrill (Pettit, Upper B-Zone) | Marion | 1 | 77.1K | 21 | by Jan 1993 – Jan 2026 |
| Cook, Claude O-10-26601 | JM Cox Resources, L.P. only | Spraberry (Trend Area) | Midland | 1 | 55.5K | 60.7K | by Jan 1993 – Apr 2008 |
| Becton, Claude "A" O-9-7219 | Tracker Resource Dev III, LLC only | Spraberry (Trend Area) | Irion | 4 | 45.7K | 86.7K | by Jan 1993 – Oct 2015 |
| Becton, Claude O-9-6868 | Earthstone Operating, LLC only | Spraberry (Trend Area) | Irion | 4 | 40.1K | 290K | by Jan 1993 – Jul 2021 |
| Feldman O-10-17065 | Claude-Maggie Co. only | Wheat | Loving | 6 | 34.5K | 1.96K | by Jan 1993 – Dec 2025 |
| Claude Unit 23 O-10-46520 | Oxyrock Operating, LLC only | Spraberry (Trend Area) | Howard | 1 | 34.3K | 129K | Feb 2015 – Apr 2026 |
| Olenick, Claude W. O-1-7265 | WRD Oil, LLC only | Floresville, S. (Austin Chalk) | Wilson | 2 | 31.2K | 55 | by Jan 1993 – Oct 2025 |
| Dickerson, Claude O-1-2126 | SGB Oil LLC only | Salt Flat | Caldwell | 10 | 30.6K | 16.3K | by Jan 1993 – Apr 2026 |
| Whitburn, Mrs. Claude O-8-15616 | DP2, LLC only | Taylor County Regular | Taylor | 2 | 22.9K | 22 | by Jan 1993 – May 2020 |
| Claude E. Heard, et Al O-2-10996 | Hilcorp Energy Company only | Tom Oconnor (5200, East) | Refugio | 2 | 20.5K | 6.24K | Jan 2018 – Jan 2023 |
| Orm, Claude O-13-14167 | Coral E&P, LLC only | Eanes (Atoka) | Montague | 1 | 18.9K | 70.9K | by Jan 1993 – Jun 2021 |
| Davey-State O-10-18890 | Claude-Maggie Co. only | Wheat | Loving | 1 | 18.8K | 130 | by Jan 1993 – Nov 2025 |
| Claude Brocksmith Unit O-3-26172 | Redbud E & P, Inc. only | Kurten (Woodbine) | Brazos | 1 | 18.2K | 0 | Oct 2011 – Apr 2026 |
| Heard, Claude E. et Al O-2-8744 | Hilcorp Energy Company only | Tom Oconnor (5400 Sand) | Refugio | 1 | 10.7K | 42.2K | Oct 2002 – Mar 2009 |
| Russell, L. B., Etal O-10-7963 | Claude-Maggie Co. only | Wheat | Loving | 5 | 9.68K | 3K | by Jan 1993 – Sep 2025 |
| Senn, Claude O-11-60483 | Coyote Oil & Gas, Inc. only | Wallace Ranch,ne. (Noodle Creek) | Kent | 3 | 7.23K | 20 | by Jan 1993 – May 2001 |
| Brocksmith, Claude O-3-17675 | Impetro Operating LLC only | Kurten (Buda) | Brazos | 1 | 6.59K | 0 | Jul 2005 – Sep 2011 |
| Orm, Claude O-13-13025 | Miller, Glenn J. only | Boedeker, Southwest (Caddo) | Montague | 1 | 6.48K | 72.9K | Jul 2003 – Apr 2017 |
| Ashley, Claude O-8-29715 | S.B. Street Operating, Inc. only | Sojourner (Meadors Sand) | Haskell | 1 | 5.71K | 0 | Apr 2006 – Mar 2013 |
| Moore O-13-25365 | Person, Claude only | Shannon (Caddo) | Clay | 1 | 5.02K | 20.9K | by Jan 1993 – Jun 1999 |
| Collins, Claude Jr. Estate O-10-31354 | Ladd Oil & Gas Corporation only | China Draw (Ellenburger) | Sterling | 1 | 4.92K | 14 | Apr 1995 – Jan 2005 |
| Collins, Claude Jr. Estate -B- O-10-32214 | Ladd Oil & Gas Corporation only | China Draw (Canyon) | Sterling | 1 | 4.63K | 40 | May 1995 – Oct 2006 |
| Smith, Claude O-8-23054 | Wells Oilfield Services, Inc. only | Noodle, NW. (Canyon Sd. 4100) | Jones | 1 | 4.56K | 5.78K | by Jan 1993 – Nov 1997 |
| Childers "A" O-13-19187 | Person, Claude only | Post Oak (Ellenburger) | Jack | 1 | 4.21K | 4.17K | by Jan 1993 – Nov 1995 |
| Claude E. Heard, et Al O-2-9866 | Hilcorp Energy Company only | Tom Oconnor, N. (5160) | Refugio | 1 | 3.45K | 366 | Nov 2011 – Aug 2012 |
| Brantley, Ola Unit O-13-18120 | Person, Claude only | Newport, West (Conglomerate) | Jack | 1 | 2.93K | 93.5K | by Jan 1993 – Jun 2006 |
| Heard, Claude, E. et Al O-2-8093 | Hilcorp Energy Company only | Tom O'Connor (4150) | Refugio | 1 | 2.78K | 5.88K | Aug 1995 – Jan 1997 |
| Becton, Claude O-9-1961 | Permian Resources Operating, LLC only | Sugg (Clear Fork) | Irion | 2 | 1.84K | 32.1K | by Jan 1993 – May 2018 |
| Cowan, Claude et Al O-13-202 | S & S Oil Well Service, Inc. only | Archer County Regular | Archer | 6 | 1.16K | 35 | by Jan 1993 – Jan 2011 |
| Heard, Claude E. et Al O-2-8743 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 1 | 1.08K | 13K | Oct 2002 – Apr 2004 |
| Orm, Claude O-13-14181 | Coral E&P, LLC only | Eanes (Caddo) | Montague | 2 | 503 | 3.45K | by Jan 1993 – Aug 2002 |
| Olenick, Claude W. Oil Unit #1 O-1-13494 | Al-TX Operating Inc. only | Floresville, S. (Austin Chalk) | Wilson | 1 | 404 | 9 | by Jan 1993 – Apr 1995 |
| Senn, Claude O-11-69159 | Mokan Capital, LLC only | Wallace Ranch,ne. (Noodle Creek) | Kent | 2 | 377 | 0 | Oct 2008 – Jun 2016 |
| Heard, Claude E. et Al O-2-9134 | Hilcorp Energy Company only | Tom Oconnor (5425 Sand) | Refugio | 1 | 355 | 528 | Apr 2007 – Dec 2007 |
| Claude E. Heard, et Al O-2-11465 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 1 | 317 | 62 | Jan 2018 – Feb 2018 |
| Nichols, Claude O-6-10601 | Oto, Co. only | Talco | Franklin | 2 | 300 | 4 | Jun 1993 – May 1994 |
| Heard, Claude et Al O-2-7819 | Hilcorp Energy Company only | Tom Oconnor (5625 Sand) | Refugio | 1 | 268 | 477 | by Jan 1993 – Mar 1993 |
| Deweber, Luther O-13-23910 | Person, Claude only | Tally (Congl.) | Clay | 1 | 114 | 13.6K | by Jan 1993 – Oct 1997 |
| Powers O-13-25317 | Person, Claude only | Dillard, SE. (Conglomerate) | Jack | 2 | 104 | 9.05K | by Jan 1993 – Sep 1996 |
| Heard, Claude E. et Al O-2-9143 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 1 | 25 | 1.7K | Jun 2007 – Jun 2007 |
| Moore-Langdon O-14-824 | Robinson, Claude Oil & Gas only | Panhandle Hutchinson County Fld. | Hutchinson | 7 | 0 | 0 | — |
| Heard, Claude E. et Al O-2-5684 | Hilcorp Energy Company only | Greta (O-6) | Refugio | 1 | 0 | 0 | — |
| Heard, Claude E. O-2-3995 | Quintana Pet. Corp. only | Greta (4400) | Refugio | 1 | 0 | 0 | — |
| Reeves, Claude O-2-307 | Cologne Production Company only | Coletto Creek, South | Victoria | 1 | 0 | 0 | — |
| Hodnett, Claude O-10-28256 | Wichita Water LLC only | Stolhan (Spraberry) | Howard | 2 | 0 | 0 | — |