| Baptist O-2-8726 | Cal-Tex Exploratn & Prod Co LLC | Blanco Creek (6700) | 2 | 43.3K | 30.7K | Jan 2002 – Jan 2016 |
| Oconnor, Thomas -B- O-2-3660 | T-C Oil Company, LLC | Tom Oconnor (5400 Sand) | 10 | 43K | 133K | by Jan 1993 – Jan 2012 |
| J.F.B. Heard-Arco O-2-11011 | Greta Operating Company LLC | Greta (4400) | 1 | 43K | 25.4K | Oct 2014 – Aug 2026 |
| Miguelita Scanio O-2-10904 | Acock/Anaqua Operating Co., LP | Refugio-Fox (6550) | 1 | 42.7K | 35.9K | Feb 2014 – Dec 2019 |
| Schirmer "C" O-2-8584 | Bent Wing Energy, LLC | Bonnie View (5400) | 1 | 42.6K | 10.7K | Dec 2000 – Aug 2006 |
| Roche, K. D. -A- O-2-3468 | Kovar Operating, LLC | Roche (-B-) | 11 | 42.2K | 376K | by Jan 1993 – Jan 2016 |
| Fox, W. J. O-2-7887 | Hilcorp Energy Company | Refugio-Fox (5850) | 1 | 42K | 34.2K | Jun 1993 – Mar 2007 |
| O'Connor, Thomas 'B' O-2-8373 | Hilcorp Energy Company | Tom Oconnor | 1 | 42K | 22.9K | Jan 2002 – Apr 2011 |
| Shay G-2-221898 | Paloma Operating, LLC | Refugio Old (6550 Frio) | 1 | 41.8K | 71.1K | Sep 2006 – Feb 2023 |
| Williams, Maude et al -A- O-2-5098 | Quintana Pet. Corp. | Lake Pasture (FT-585) | 5 | 41.6K | 93.8K | by Jan 1993 – Sep 1996 |
| Schirmer "C" O-2-7815 | Christopher Oil & Gas Inc | Bonnie View (4700) | 1 | 41.3K | 15.5K | by Jan 1993 – Mar 1996 |
| Messer, W.H. Jr. et Al O-2-6453 | Cimarron Engineering, LLC | Bonnie View, South (5300) | 1 | 41.3K | 20 | by Jan 1993 – Feb 2016 |
| Williams, Maude et al "B" O-2-7714 | Hilcorp Energy Company | Tom Oconnor (5900 Sand) | 5 | 40.8K | 109K | by Jan 1993 – Mar 2005 |
| Coastal Roche O-2-9852 | Finaly Resources LLC | Cactus (Frio Massive) | 1 | 40.6K | 57.1K | Jul 2011 – Sep 2021 |
| Heard, F.V.W. "B" O-2-8226 | CTR Petroleum, Inc. | Refugio Heard (5350) | 1 | 40.1K | 68.8K | Jan 1997 – Apr 2009 |
| Shelton, J. Isabella -C- O-2-1080 | High Plains Gas Systems, Inc. | Mission River | 1 | 40.1K | 10.4K | by Jan 1993 – Jun 2004 |
| T-C Oil Co.-O'Conner O-2-7192 | T - C Oil Company | Lake Pasture (FT-562) | 2 | 39.9K | 258K | by Jan 1993 – Dec 2003 |
| Nordan,l. A.-Oconnor,thomas,est. O-2-2869 | T-C Oil Company, LLC | Tom Oconnor (5900 Sand) | 9 | 39.6K | 114K | by Jan 1993 – Jun 1998 |
| Marberry O-2-9184 | Allegiant Resources, LLC | McFaddin (4500) | 2 | 39.5K | 8.18K | Apr 2008 – Dec 2016 |
| Lambert, M.F. O-2-6539 | H & D Operating Company | Tom Oconnor (4500 Greta Mass.) | 2 | 39.2K | 35.6K | by Jan 1993 – Jun 1997 |
| Wood, L. Est. O-2-8650 | Cummins & Walker Oil Co., Inc. | Woodsboro (FS-88) | 1 | 39K | 137K | Sep 2001 – Feb 2012 |
| Oconnor, Thomas -B- O-2-1524 | T-C Oil Company, LLC | Tom Oconnor | 9 | 38.9K | 68.2K | by Jan 1993 – Dec 2010 |
| Oconnor, Thos. -D- O-2-965 | Hilcorp Energy Company | Mary Ellen Oconnor (FQ-40 Sand) | 2 | 38.8K | 116K | by Jan 1993 – Aug 2013 |
| Roche, K. D. -E- State Oil Unit O-4-3615 | Texas, Les & Co. | Encino (5900 Sd.) | 1 | 38.7K | 20.1K | by Jan 1993 – May 2014 |
| O'Connor, Thomas O-2-9447 | Dorchester Operating Company LLC | Greta (4400) | 1 | 38.5K | 5.39K | Nov 2010 – Aug 2026 |
| Schirmer, et Al O-2-7927 | Christopher Oil & Gas Inc | Bonnie View, South (7850) | 1 | 38.3K | 36.3K | Oct 1993 – Jan 1999 |
| O'Connor O-2-12435 | Greta Operating Company LLC | Greta (4400) | 1 | 38.1K | 18.2K | Jun 2022 – Aug 2026 |
| Fagan O-2-10787 | Goldking Minerals Mgmt, L.L.C. | McFaddin (Greta 4200) | 1 | 37.8K | 13.1K | Dec 2013 – Aug 2026 |
| Bauer, Mary Claire, et Vir O-2-2871 | Hilcorp Energy Company | Tom Oconnor (5900 Sand) | 6 | 37.7K | 34.9K | by Jan 1993 – Apr 1998 |
| M. F. Lambert O-2-9484 | Hilcorp Energy Company | Tom Oconnor (7500) | 1 | 37.6K | 44.1K | Nov 2010 – Dec 2011 |
| Schirmer, Henry O-2-163 | Bent Wing Energy, LLC | Bonnie View | 10 | 37.6K | 33.7K | by Jan 1993 – Aug 2026 |
| Thomas O'Connor "B" O-2-9369 | Hilcorp Energy Company | Melon Creek, East (5800) | 1 | 37.2K | 16.3K | Oct 2009 – Feb 2013 |
| Rooke O-2-11384 | San Isidro Development Co, L. C. | Refugio New (6400 Stringer Sd.) | 1 | 36.9K | 133K | Aug 2017 – Aug 2026 |
| Marberry O-2-5837 | Allegiant Resources, LLC | McFaddin (5500 S) | 1 | 36.8K | 2.3K | by Jan 1993 – May 2009 |
| Rooke, P. H. O-2-2433 | 38 Oil & Gas, L.L.C. | Refugio New (6100 Stringer 3 SD) | 2 | 36.5K | 74.8K | by Jan 1993 – Jan 2008 |
| Lambert E, M.F. O-2-12823 | Hilcorp Energy Company | Tom Oconnor (4400) | 3 | 36.1K | 1.28K | Nov 2023 – Aug 2026 |
| O"connor Thomas "A" O-2-8780 | Hilcorp Energy Company | Tom O'Connor (5410) | 1 | 35.9K | 61.1K | Apr 2003 – Oct 2024 |
| Maude Williams et al 'A' O-2-11337 | Hilcorp Energy Company | Tom O'Connor (5350 Sand) | 2 | 35.9K | 2.18K | Jul 2016 – Jun 2023 |
| Rooke, F. B. 4 O-2-8585 | C & E Operating, Inc. | Woodsboro, West (6916) | 1 | 35.7K | 16.6K | Oct 2000 – Jan 2006 |
| Welder "C" O-2-8464 | Hilcorp Energy Company | Sharps Lake, N. (5240) | 1 | 35.7K | 222K | Aug 1998 – Jun 2006 |
| Fox, W. J. -A- O-2-3458 | Hilcorp Energy Company | Refugio-Fox (5800) | 6 | 35.5K | 3.1K | Apr 2019 – Aug 2026 |
| Williams, Maude, et al -B- O-2-4890 | Hilcorp Energy Company | Tom Oconnor (5450 Sand) | 4 | 35.4K | 78K | by Jan 1993 – Aug 2026 |
| Welder "C" O-2-8223 | Forest Oil Corporation | Sharps Lake, N. (5240) | 1 | 35.2K | 125K | Oct 1996 – Apr 2006 |
| Fox, W. J. -A- O-2-4425 | Hilcorp Energy Company | Hynes Ranch (FD-37) | 1 | 34.8K | 55.7K | Feb 1993 – Jan 2013 |
| Williams, Maude et al "B" O-2-8177 | Hilcorp Energy Company | Tom Oconnor (5425 Sand) | 1 | 34.4K | 101K | Jun 1996 – Feb 2011 |
| Clement Heard 41 O-2-11811 | Hilcorp Energy Company | Tom Oconnor (4500 Greta Mass.) | 1 | 34K | 2.08K | Jul 2019 – Mar 2023 |
| Braman -A- O-2-12766 | T-C Oil Company, LLC | Braman (8200) | 1 | 33K | 335K | Apr 2024 – Aug 2026 |
| Baumgartner -A- G-2-250674 | T-C Oil Company, LLC | Vidauri, North (6400) | 1 | 32.9K | 243K | Oct 2008 – Aug 2014 |
| O'Connor O-2-7586 | T-C Oil Company, LLC | Huff (4800) | 3 | 32.7K | 133K | by Jan 1993 – Dec 2024 |
| Scanio/Shelton O-2-8976 | High Plains Gas Systems, Inc. | Mission River (6000) | 1 | 32.5K | 27.7K | Feb 2005 – Sep 2015 |