| Roche O-2-9287 | Salida Exploration, LLC | Roche, S. (Chamberlain) | 3 | 59.8K | 56.5K | Feb 2009 – May 2014 |
| Heard, Fannie V. W., Mrs. O-2-1541 | Hilcorp Energy Company | Tom Oconnor | 14 | 59.8K | 120K | Jan 1995 – Jan 2021 |
| O'Connor -H- O-2-12315 | T-C Oil Company, LLC | Anaqua, South (3000) | 1 | 59.5K | 17.5K | Jan 2022 – Aug 2026 |
| W. J. Fox 'A' O-2-10474 | Hilcorp Energy Company | Hynes Ranch (F- 6) | 1 | 59.3K | 251K | Jul 2012 – Aug 2021 |
| O'Connor, Thomas "A" O-2-8755 | Hilcorp Energy Company | Tom O'Connor (5350 Sand) | 2 | 59K | 141K | Dec 2002 – Mar 2018 |
| Clay Pasture -E- State Unit O-2-12305 | T-C Oil Company, LLC | McFaddin (3900) | 1 | 59K | 86.9K | Dec 2021 – Aug 2026 |
| Lambert, M. F. O-2-7852 | Hilcorp Energy Company | Siene Bean (5770) | 2 | 58.3K | 407K | by Jan 1993 – Oct 2001 |
| Williams, Maude et al "A" O-2-7891 | Hilcorp Energy Company | Lake Pasture (FS-541) | 2 | 58.3K | 199K | Jul 1993 – Jul 2001 |
| Braman -D- G-2-288971 | T-C Oil Company, LLC | Braman (8000) | 1 | 58.2K | 678K | Jun 2019 – Aug 2026 |
| Clay Pasture -B- State Unit O-2-10101 | T-C Oil Company, LLC | Anaqua (3000) | 1 | 57.1K | 17.8K | Jan 2012 – Aug 2026 |
| Oconnor, Mary Ellen O-2-5253 | Dolphin Petroleum, LP | Mary Ellen Oconnor (Stray A) | 6 | 57.1K | 261K | by Jan 1993 – Jul 2016 |
| Shelton, F. Ben et Al O-2-12490 | Paloma Operating, LLC | Woodsboro (FS-88) | 1 | 56.8K | 18.2K | Feb 2022 – Aug 2026 |
| Mary Claire Bauer et Vir O-2-9551 | Hilcorp Energy Company | Tom Oconnor (4500 Greta Mass.) | 4 | 56.4K | 12.6K | Dec 2010 – Aug 2026 |
| Anderson, Mary Alice et al 'A' O-2-12275 | T-C Oil Company, LLC | Fagan (Greta Sand) | 1 | 56.1K | 171K | Dec 2021 – Jun 2026 |
| Miguelita Scanio O-2-9399 | Digital Operating Company LLC | Refugio-Fox (6850) | 1 | 55.5K | 94K | Feb 2010 – Dec 2025 |
| Obrien, J. J. O-2-1409 | Eagleford Operating, Inc. | Refugio Old | 4 | 55.1K | 134K | Dec 1993 – Jan 2006 |
| O'Connor, Thomas "A" O-2-8686 | Hilcorp Energy Company | Tom Oconnor (5440) | 2 | 55K | 146K | Jan 2002 – Oct 2024 |
| O'Connor, L.W. O-2-7979 | O'Connor Energy Management, LLC | Mary Ellen Oconnor (FT-8) | 1 | 54.9K | 87.4K | Aug 1994 – Dec 2015 |
| Miguelita Scanio O-2-9074 | Digital Operating Company LLC | Refugio-Fox (6500) | 1 | 54.3K | 68.7K | Oct 2006 – Dec 2017 |
| Oconnor, Thomas -D- O-2-1525 | T-C Oil Company, LLC | Tom Oconnor | 7 | 53.8K | 552K | by Jan 1993 – Dec 2005 |
| Hynes, Jamie O-2-2436 | Wallis Energy, Inc. | Refugio New (6150 Sand) | 1 | 53.7K | 13K | by Jan 1993 – Jun 2026 |
| O Connor, Thos. -B- O-2-954 | Hilcorp Energy Company | Mary Ellen Oconnor (FQ- 9) | 10 | 53.5K | 308K | by Jan 1993 – Jan 2016 |
| Lambert, M.F. O-2-7966 | Hilcorp Energy Company | Tom Oconnor (5250) | 3 | 53.4K | 56.7K | May 1994 – Apr 2012 |
| Wood River Ranch 'B' O-2-10563 | Kebo Oil & Gas, Inc. | Woodsboro (6300 Sand) | 1 | 53.2K | 21.2K | May 2013 – Feb 2020 |
| Oconnor O-2-1503 | T-C Oil Company, LLC | T-C (5600) | 19 | 52K | 203K | by Jan 1993 – Jul 2008 |
| Shelton O-2-8996 | Kebo Oil & Gas, Inc. | Lake Pasture (FT-738-W) | 1 | 52K | 51.6K | Oct 2005 – Mar 2011 |
| Fagan O-2-7923 | Goldking Minerals Mgmt, L.L.C. | McFaddin, East (5450) | 1 | 52K | 29K | Oct 1993 – Jul 2009 |
| T-C Oil Co.-Oconnor O-2-2817 | T - C Oil Company | Lake Pasture (FS-527) | 3 | 51.5K | 607K | by Jan 1993 – Aug 2004 |
| Little, G. W. O-2-3762 | Summit Resources Mgmt., LLC. | Zarsky, S. (Frio 8300) | 1 | 51.1K | 22 | by Jan 1993 – Oct 2006 |
| Scanio, Miguelita O-2-9062 | Digital Operating Company LLC | Refugio Old (6400) | 2 | 50.8K | 103K | Jan 2006 – Feb 2022 |
| Rooke, P. H. O-2-2500 | 38 Oil & Gas, L.L.C. | Refugio New (4500) | 4 | 48.7K | 162K | by Jan 1993 – May 2010 |
| Schirmer-Buck Unit O-2-10146 | Bent Wing Energy, LLC | Bonnie View (5400) | 1 | 48.4K | 66.1K | Feb 2012 – Mar 2022 |
| Roche G-2-183598 | Wiser Oil Company, The | Kathleen (Frio B) | 1 | 47.2K | 133K | Feb 2000 – Oct 2002 |
| Welder-Terrell O-2-8831 | C & E Operating, Inc. | Devils Run (Chamberlain 3A) | 1 | 46.9K | 211K | Sep 2003 – Apr 2007 |
| Marberry O-2-5972 | Allegiant Resources, LLC | McFaddin (5600) | 2 | 46.9K | 2.22K | by Jan 1993 – Jan 2015 |
| Rooke, P. H. O-2-1383 | 38 Oil & Gas, L.L.C. | Refugio New (6200 FB 1) | 5 | 46.8K | 89K | by Jan 1993 – Jan 2000 |
| Miguelita Scanio O-2-10549 | Digital Operating Company LLC | Refugio New (6400 Stringer Sd.) | 1 | 46.7K | 55.4K | Apr 2013 – Oct 2022 |
| Welder Heirs O-2-8529 | C & E Operating, Inc. | Devils Run (Chamberlain 3A) | 1 | 46.5K | 76K | Mar 2000 – Aug 2005 |
| Williams, Maude et al "A" O-2-7940 | Quintana Pet. Corp. | Lake Pasture (FT-750) | 1 | 46.3K | 64.3K | Jan 1994 – Oct 1996 |
| Oconnor -D- O-2-5195 | T - C Oil Company | Lake Pasture (FT-690) | 1 | 46.2K | 132K | by Jan 1993 – Mar 2004 |
| M.V.O.C.-Baptist Unit O-2-10753 | Charro Operating, L.L.C. | Blanco Creek (6400) | 1 | 45.5K | 85.9K | Sep 2011 – Mar 2016 |
| O'Connor, Thomas 'C' O-2-8272 | Hilcorp Energy Company | Tom Oconnor (5625 Sand) | 8 | 45.4K | 200K | Apr 1997 – Feb 2005 |
| Lambert, M. F. O-2-9191 | Hilcorp Energy Company | Tom Oconnor (West 6600) | 1 | 45.1K | 176K | Mar 2008 – Dec 2011 |
| Jacks et Al G-2-177715 | Neumin Production Company | Big Jim (Third Sinton) | 1 | 45.1K | 355K | Dec 1999 – Aug 2001 |
| Huff, G. O-2-5135 | Great Bay Operations, LLC | McFaddin (4400) | 1 | 45K | 71.5K | by Jan 1993 – Aug 2009 |
| O'Connor, L. W. O-2-958 | O'Connor Energy Management, LLC | Mary Ellen Oconnor (FQ-40 Sand) | 7 | 44.9K | 280K | by Jan 1993 – Dec 2015 |
| Oconnor, Mary Ellen O-2-5502 | Dolphin Petroleum, LP | Woodsboro, South (4200) | 9 | 44.4K | 123K | by Jan 1993 – Jul 2016 |
| Reilly, Annie et Vir O-2-8498 | Hilcorp Energy Company | Tom Oconnor (5625 Sand) | 2 | 44.4K | 180K | Nov 1999 – Mar 2005 |
| Scanio, Miguelita O-2-8889 | Digital Operating Company LLC | Refugio-Fox (6400) | 3 | 44.1K | 437K | Jun 2004 – Nov 2022 |
| Remora Oil Unit O-2-7899 | Allegiant Resources, LLC | Huff (2920) | 1 | 43.4K | 39.1K | Aug 1993 – Feb 2015 |