| Heard, Fannie V. W., Mrs. O-2-1541 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 14 | 59.8K | 120K | Jan 1995 – Jan 2021 |
| W. J. Fox 'A' O-2-10474 | Hilcorp Energy Company only | Hynes Ranch (F- 6) | Refugio | 1 | 59.3K | 251K | Jul 2012 – Aug 2021 |
| O'Connor, Thomas "A" O-2-8755 | Hilcorp Energy Company only | Tom O'Connor (5350 Sand) | Refugio | 2 | 59K | 141K | Dec 2002 – Mar 2018 |
| Clay Pasture -E- State Unit O-2-12305 | T-C Oil Company, LLC only | McFaddin (3900) | Refugio | 1 | 58.5K | 86.7K | Dec 2021 – Apr 2026 |
| Lambert, M. F. O-2-7852 | Hilcorp Energy Company only | Siene Bean (5770) | Refugio | 2 | 58.3K | 407K | Jan 1993 – Oct 2001 |
| Williams, Maude et al "A" O-2-7891 | Hilcorp Energy Company only | Lake Pasture (FS-541) | Refugio | 2 | 58.3K | 199K | Jul 1993 – Jul 2001 |
| J.M. O'Brien JLB O-2-12584 | South Texas Operating Company only | Greta (4400) | Refugio | 1 | 57.7K | 0 | Dec 2022 – Apr 2026 |
| Oconnor, Mary Ellen O-2-5253 | Dolphin Petroleum, LP only | Mary Ellen Oconnor (Stray A) | Refugio | 6 | 57.1K | 261K | Jan 1993 – Jul 2016 |
| Braman -D- G-2-288971 | T-C Oil Company, LLC only | Braman (8000) | Refugio | 1 | 56.6K | 669K | Jun 2019 – Apr 2026 |
| O'Connor -H- O-2-12315 | T-C Oil Company, LLC only | Anaqua, South (3000) | Refugio | 1 | 56.5K | 14K | Jan 2022 – Apr 2026 |
| Clay Pasture -B- State Unit O-2-10101 | T-C Oil Company, LLC only | Anaqua (3000) | Refugio | 1 | 56.2K | 17.6K | Jan 2012 – Apr 2026 |
| Mary Claire Bauer et Vir O-2-9551 | Hilcorp Energy Company only | Tom Oconnor (4500 Greta Mass.) | Refugio | 4 | 56.1K | 12.3K | Dec 2010 – Apr 2026 |
| Anderson, Mary Alice et al 'A' O-2-12275 | T-C Oil Company, LLC only | Fagan (Greta Sand) | Refugio | 1 | 56.1K | 169K | Dec 2021 – Apr 2026 |
| Shelton, F. Ben et Al O-2-12490 | Paloma Operating, LLC only | Woodsboro (FS-88) | Refugio | 1 | 55.5K | 18.2K | Feb 2022 – Apr 2026 |
| Miguelita Scanio O-2-9399 | Digital Operating Company LLC only | Refugio-Fox (6850) | Refugio | 1 | 55.5K | 94K | Feb 2010 – Dec 2025 |
| Obrien, J. J. O-2-1409 | Eagleford Operating, Inc. only | Refugio Old | Refugio | 4 | 55.1K | 134K | Dec 1993 – Jan 2006 |
| O'Connor, Thomas "A" O-2-8686 | Hilcorp Energy Company only | Tom Oconnor (5440) | Refugio | 2 | 55K | 146K | Jan 2002 – Oct 2024 |
| O'Connor, L.W. O-2-7979 | O'Connor Energy Management, LLC only | Mary Ellen Oconnor (FT-8) | Refugio | 1 | 54.9K | 87.4K | Aug 1994 – Dec 2015 |
| Miguelita Scanio O-2-9074 | Digital Operating Company LLC only | Refugio-Fox (6500) | Refugio | 1 | 54.3K | 68.7K | Oct 2006 – Dec 2017 |
| Oconnor, Thomas -D- O-2-1525 | T-C Oil Company, LLC only | Tom Oconnor | Refugio | 7 | 53.8K | 552K | Jan 1993 – Dec 2005 |
| O Connor, Thos. -B- O-2-954 | Hilcorp Energy Company only | Mary Ellen Oconnor (FQ- 9) | Refugio | 10 | 53.5K | 308K | Jan 1993 – Jan 2016 |
| Hynes, Jamie O-2-2436 | Wallis Energy, Inc. only | Refugio New (6150 Sand) | Refugio | 1 | 53.5K | 13K | Jan 1993 – Apr 2026 |
| Lambert, M.F. O-2-7966 | Hilcorp Energy Company only | Tom Oconnor (5250) | Refugio | 3 | 53.4K | 56.7K | May 1994 – Apr 2012 |
| Wood River Ranch 'B' O-2-10563 | Kebo Oil & Gas, Inc. only | Woodsboro (6300 Sand) | Refugio | 1 | 53.2K | 21.2K | May 2013 – Feb 2020 |
| Oconnor O-2-1503 | T-C Oil Company, LLC only | T-C (5600) | Refugio | 19 | 52K | 203K | Jan 1993 – Jul 2008 |
| Shelton O-2-8996 | Kebo Oil & Gas, Inc. only | Lake Pasture (FT-738-W) | Refugio | 1 | 52K | 51.6K | Oct 2005 – Mar 2011 |
| Fagan O-2-7923 | Allegiant Resources, LLC only | McFaddin, East (5450) | Refugio | 1 | 52K | 29K | Oct 1993 – Jul 2009 |
| T-C Oil Co.-Oconnor O-2-2817 | T - C Oil Company only | Lake Pasture (FS-527) | Refugio | 3 | 51.5K | 607K | Jan 1993 – Aug 2004 |
| Little, G. W. O-2-3762 | Summit Resources Mgmt., LLC. only | Zarsky, S. (Frio 8300) | Refugio | 1 | 51.1K | 22 | Jan 1993 – Oct 2006 |
| Scanio, Miguelita O-2-9062 | Digital Operating Company LLC only | Refugio Old (6400) | Refugio | 2 | 50.8K | 103K | Jan 2006 – Feb 2022 |
| Rooke, P. H. O-2-2500 | 38 Oil & Gas, L.L.C. only | Refugio New (4500) | Refugio | 4 | 48.7K | 162K | Jan 1993 – May 2010 |
| Schirmer-Buck Unit O-2-10146 | Bent Wing Energy, LLC only | Bonnie View (5400) | Refugio | 1 | 48.4K | 66.1K | Feb 2012 – Mar 2022 |
| Roche G-2-183598 | Wiser Oil Company, The only | Kathleen (Frio B) | Refugio | 1 | 47.2K | 133K | Feb 2000 – Oct 2002 |
| Welder-Terrell O-2-8831 | C & E Operating, Inc. only | Devils Run (Chamberlain 3A) | Refugio | 1 | 46.9K | 211K | Sep 2003 – Apr 2007 |
| Marberry O-2-5972 | Allegiant Resources, LLC only | McFaddin (5600) | Refugio | 2 | 46.9K | 2.22K | Jan 1993 – Jan 2015 |
| Rooke, P. H. O-2-1383 | 38 Oil & Gas, L.L.C. only | Refugio New (6200 FB 1) | Refugio | 5 | 46.8K | 89K | Jan 1993 – Jan 2000 |
| Miguelita Scanio O-2-10549 | Digital Operating Company LLC only | Refugio New (6400 Stringer Sd.) | Refugio | 1 | 46.7K | 55.4K | Apr 2013 – Oct 2022 |
| Welder Heirs O-2-8529 | C & E Operating, Inc. only | Devils Run (Chamberlain 3A) | Refugio | 1 | 46.5K | 76K | Mar 2000 – Aug 2005 |
| Williams, Maude et al "A" O-2-7940 | Quintana Pet. Corp. only | Lake Pasture (FT-750) | Refugio | 1 | 46.3K | 64.3K | Jan 1994 – Oct 1996 |
| Oconnor -D- O-2-5195 | T - C Oil Company only | Lake Pasture (FT-690) | Refugio | 1 | 46.2K | 132K | Jan 1993 – Mar 2004 |
| M.V.O.C.-Baptist Unit O-2-10753 | Charro Operating, L.L.C. only | Blanco Creek (6400) | Refugio | 1 | 45.5K | 85.9K | Sep 2011 – Mar 2016 |
| O'Connor, Thomas 'C' O-2-8272 | Hilcorp Energy Company only | Tom Oconnor (5625 Sand) | Refugio | 8 | 45.4K | 200K | Apr 1997 – Feb 2005 |
| Lambert, M. F. O-2-9191 | Hilcorp Energy Company only | Tom Oconnor (West 6600) | Refugio | 1 | 45.1K | 176K | Mar 2008 – Dec 2011 |
| Jacks et Al G-2-177715 | Neumin Production Company only | Big Jim (Third Sinton) | Refugio | 1 | 45.1K | 355K | Dec 1999 – Aug 2001 |
| Huff, G. O-2-5135 | Great Bay Operations, LLC only | McFaddin (4400) | Refugio | 1 | 45K | 71.5K | Jan 1993 – Aug 2009 |
| O'Connor, L. W. O-2-958 | O'Connor Energy Management, LLC only | Mary Ellen Oconnor (FQ-40 Sand) | Refugio | 7 | 44.9K | 280K | Jan 1993 – Dec 2015 |
| Oconnor, Mary Ellen O-2-5502 | Dolphin Petroleum, LP only | Woodsboro, South (4200) | Refugio | 9 | 44.4K | 123K | Jan 1993 – Jul 2016 |
| Reilly, Annie et Vir O-2-8498 | Hilcorp Energy Company only | Tom Oconnor (5625 Sand) | Refugio | 2 | 44.4K | 180K | Nov 1999 – Mar 2005 |
| Scanio, Miguelita O-2-8889 | Digital Operating Company LLC only | Refugio-Fox (6400) | Refugio | 3 | 44.1K | 437K | Jun 2004 – Nov 2022 |
| Remora Oil Unit O-2-7899 | Allegiant Resources, LLC only | Huff (2920) | Refugio | 1 | 43.4K | 39.1K | Aug 1993 – Feb 2015 |