| Heard, Fannie V. W., Mrs. O-2-2546 | Hilcorp Energy Company only | Tom Oconnor (4500 Greta Mass.) | Refugio | 46 | 2.17M | 929K | Jan 1993 – Apr 2026 |
| Oconnor, Thomas, -C- O-2-2566 | Hilcorp Energy Company only | Tom Oconnor (4500 Greta Mass.) | Refugio | 18 | 646K | 278K | Jan 1993 – Apr 2026 |
| Heard, Clement O-2-2523 | Hilcorp Energy Company only | Tom Oconnor (4500 Greta Mass.) | Refugio | 16 | 539K | 277K | Jan 1993 – Apr 2026 |
| BP O-2-8324 | Gilster, Ralph R. III only | Lake Pasture, West (4450) | Refugio | 26 | 485K | 839K | Nov 1997 – Dec 2000 |
| Williams, Maude, et al -A- O-2-2906 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 15 | 314K | 643K | Jan 1993 – Mar 2026 |
| Oconnor, Thomas -A- O-2-4927 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 12 | 238K | 685K | Jan 1993 – Sep 2023 |
| Lambert, M. F. O-2-4958 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 7 | 166K | 421K | Jan 1993 – May 2025 |
| Reilly, Annie, et Vir O-2-2592 | Hilcorp Energy Company only | Tom Oconnor (4500 Greta Mass.) | Refugio | 5 | 153K | 144K | Jan 1993 – Oct 2023 |
| O'Connor, Dennis O-2-3014 | T - C Oil Company only | Lake Pasture, West (4450) | Refugio | 8 | 133K | 1.78M | Jan 1993 – Dec 2000 |
| O'Connor, Dennis et al "G" O-2-8384 | T - C Oil Company only | Lake Pasture, West (4500) | Refugio | 1 | 99.1K | 55.1K | Jun 1998 – Oct 2008 |
| Fagan O-2-7924 | Allegiant Resources, LLC only | McFaddin (4500) | Refugio | 6 | 97.3K | 85.7K | Oct 1993 – Sep 2017 |
| Lambert, M. F. O-2-4902 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 4 | 79.3K | 106K | Jan 1993 – Mar 2020 |
| Clement Heard 42 O-2-11813 | Hilcorp Energy Company only | Tom Oconnor (4500 Greta Mass.) | Refugio | 1 | 69.1K | 7.93K | Aug 2019 – 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 |
| Fagan O-2-7923 | Allegiant Resources, LLC only | McFaddin, East (5450) | Refugio | 1 | 52K | 29K | Oct 1993 – Jul 2009 |
| 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 |
| Marberry O-2-9184 | Allegiant Resources, LLC only | McFaddin (4500) | Refugio | 2 | 39.5K | 8.18K | Apr 2008 – Dec 2016 |
| Lambert, M.F. O-2-6539 | H & D Operating Company only | Tom Oconnor (4500 Greta Mass.) | Refugio | 2 | 39.2K | 35.6K | Jan 1993 – Jun 1997 |
| Williams, Maude, et al -B- O-2-4890 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 4 | 35.4K | 78K | Jan 1993 – Nov 2024 |
| Clement Heard 41 O-2-11811 | Hilcorp Energy Company only | Tom Oconnor (4500 Greta Mass.) | Refugio | 1 | 34K | 2.08K | Jul 2019 – Mar 2023 |
| Fagan C O-2-9196 | Allegiant Resources, LLC only | McFaddin (4500) | Refugio | 1 | 28.4K | 11.8K | May 2008 – Mar 2017 |
| Fagan C O-2-10830 | Allegiant Resources, LLC only | McFaddin, N. (4450) | Refugio | 1 | 23.2K | 12.8K | Sep 2013 – Dec 2022 |
| Schirmer, Henry O-2-5426 | Bent Wing Energy, LLC only | Bonnie View (4550 Stringer) | Refugio | 1 | 20.5K | 16.7K | Jan 1993 – Feb 2001 |
| Marberry O-2-10057 | Allegiant Resources, LLC only | McFaddin, N. (4450) | Refugio | 3 | 19.9K | 5.97K | Aug 2011 – Nov 2018 |
| Fagan O-2-9347 | Allegiant Resources, LLC only | McFaddin, N. (4450) | Refugio | 1 | 16.2K | 15.7K | Oct 2009 – Jan 2016 |
| Fagan O-2-9345 | Great Bay Operations, LLC only | McFaddin (4500) | Refugio | 1 | 15.4K | 9.5K | Oct 2009 – Jul 2011 |
| Miguelita Scanio O-2-10419 | Acock/Anaqua Operating Co., LP only | Refugio-Fox (6450 Stringer) | Refugio | 2 | 13.1K | 104K | Nov 2012 – Mar 2020 |
| Marberry B O-2-10927 | Allegiant Resources, LLC only | McFaddin, N. (4450) | Refugio | 1 | 12.4K | 5.47K | Apr 2014 – Jun 2017 |
| Oconnor, Thomas -A- O-2-3837 | T-C Oil Company, LLC only | Tom Oconnor (5450 Sand) | Refugio | 1 | 12.3K | 42.3K | Jan 1993 – Aug 2008 |
| O'Connor, Thomas,-C- O-2-9651 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 2 | 11.8K | 5.35K | Jul 2011 – Jan 2015 |
| Marberry O-2-9340 | Great Bay Operations, LLC only | McFaddin (4500) | Refugio | 1 | 9.93K | 0 | Jan 2010 – Apr 2012 |
| Lambert, Mary F. O-2-4888 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 1 | 9.05K | 35.9K | Jan 1993 – Dec 2008 |
| Heard, Fannie V. W. Mrs. O-2-9217 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 1 | 6.08K | 5.88K | Jun 2008 – Feb 2015 |
| Ira Heard "B" O-2-9356 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 1 | 2.53K | 259 | Dec 2009 – Jan 2014 |
| Schirmer-Buck Unit O-2-9239 | Christopher Oil & Gas Inc only | Bonnie View (4550 Stringer) | Refugio | 1 | 2.4K | 0 | Jul 2008 – Dec 2009 |
| Heard-State Unit #2 O-2-8683 | CTR Petroleum, Inc. only | Refugio, New (2450) | Refugio | 1 | 1.85K | 15.2K | Dec 2001 – Dec 2004 |
| Williams, Maude et al -A- O-2-5871 | Quintana Pet. Corp. only | Lake Pasture (FS-545) | Refugio | 2 | 1.82K | 12K | Jan 1993 – Nov 1993 |
| Davenport, O. H. O-2-8590 | CTR Petroleum, Inc. only | Refugio New (4500) | Refugio | 1 | 1.59K | 938 | Jan 2001 – Mar 2003 |
| Davenport, O. H. O-2-5272 | CTR Petroleum, Inc. only | Refugio New (4500) | Refugio | 1 | 1.11K | 21 | Jan 1993 – Dec 1994 |
| 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 |
| Heard, Fannie V. W. Mrs. O-2-8987 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 1 | 1.04K | 918 | Sep 2005 – Apr 2006 |
| Heard, Clement O-2-9128 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 1 | 851 | 2.16K | Mar 2007 – Aug 2008 |
| Lambert, M. F. O-2-3917 | Devon Energy Production Co, L.P. only | Tom Oconnor (4500 Greta Mass.) | Refugio | 1 | 728 | 11K | Jan 1993 – Oct 1993 |
| O'Conner -D- O-2-6133 | Long Trusts, The only | Lake Pasture (FS-545) | Refugio | 1 | 561 | 12.9K | Jan 1993 – Nov 1993 |
| Welder "A" G-2-161480 | Forest Oil Corporation only | Vidauri, West (4500) | Refugio | 1 | 475 | 1.07M | Nov 1996 – May 2006 |
| Williams, Maude et al -C- O-2-9198 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 3 | 359 | 30 | Jan 2013 – Apr 2013 |
| Marberry B O-2-11042 | Allegiant Resources, LLC only | McFaddin (4500) | Refugio | 1 | 353 | 3.02K | Sep 2014 – Feb 2015 |
| Roadrunner O-2-11332 | TC Oil and Gas, LLC only | Kathleen (Tuttle 5845) | Refugio | 1 | 312 | 0 | May 2016 – Jul 2016 |
| Welder, J. F. Heirs-R G-2-63581 | Valence Operating Company only | Vidauri, West (4500) | Refugio | 1 | 174 | 1.03M | Jan 1993 – May 2010 |
| O'Connor, Thomas "C" O-2-8001 | Quintana Pet. Corp. only | Tom Oconnor (5450 Sand) | Refugio | 1 | 153 | 3.52K | Sep 1994 – May 1995 |