| Holcomb O-13-28599 | Karper Oil & Gas Corporation only | Karran, North (Marble Falls) | Young | 1 | 84.2K | 1.07M | Jul 1993 – Aug 2020 |
| Holcomb "A" O-13-23361 | Gannett Operating LLC only | Karran, North (Marble Falls) | Young | 4 | 79.5K | 254K | by Jan 1993 – Jul 2016 |
| Barnett No. 4 Unit O-13-28961 | Itx Corporation only | Barnett (Marble Falls, Oil) | Young | 1 | 72K | 471K | May 1995 – Aug 2026 |
| Donnell, Sallie R. O-13-28747 | S.B. Street Operating, Inc. only | Murray (Marble Falls) | Young | 1 | 66.1K | 96.4K | Feb 1994 – Jun 2023 |
| Clark Estate "B" 6 O-13-28978 | Karper Oil & Gas Corporation only | Karran, North (Marble Falls) | Young | 1 | 65.6K | 778K | Jun 1995 – Jun 2026 |
| Holcomb "F" O-13-25412 | Hill, R.M. Operating Inc. only | Karran, North (Marble Falls) | Young | 1 | 52.1K | 110K | by Jan 1993 – Apr 2001 |
| Barnett No. 2 Unit O-13-28678 | Itx Corporation only | Barnett (Marble Falls, Oil) | Young | 1 | 44.1K | 199K | Sep 1993 – May 2024 |
| Sanders, A.G.-a- No. 2 Unit O-13-29223 | Itx Corporation only | Barnett (Marble Falls, Oil) | Young | 1 | 32.2K | 200K | Sep 1996 – Aug 2026 |
| Stewart O-13-32082 | Pop Operating Company only | Markley, SE. (Marble Falls) | Young | 2 | 30.3K | 1.78K | Jun 2011 – Aug 2026 |
| Barnett O-13-29289 | Itx Corporation only | Barnett (Marble Falls, Oil) | Young | 2 | 28.8K | 331K | Dec 1996 – Aug 2026 |
| Gahagan, C.P. "C" O-13-28702 | Itx Corporation only | Barnett (Marble Falls, Oil) | Young | 2 | 23.2K | 351K | Dec 1993 – Aug 2026 |
| Long, Bernice O-13-29446 | Itx Corporation only | Barnett (Marble Falls, Oil) | Young | 4 | 22.8K | 535K | Feb 1998 – Aug 2026 |
| Ferguson A O-13-24808 | 2MC Consulting LLC only | Stewart (Marble Falls) | Young | 1 | 20.9K | 8.64K | by Jan 1993 – Aug 2026 |
| Brazeel-King O-13-28000 | Cary Oil & Gas, Inc only | Brazeel (Marble Falls) | Young | 1 | 19.4K | 520K | by Jan 1993 – Jun 2020 |
| Sanders, A.G. -B- No. 1 Unit O-13-29184 | Itx Corporation only | Barnett (Marble Falls, Oil) | Young | 1 | 14.8K | 51.8K | Mar 1996 – Aug 2026 |
| Gahagan, C.P. "B" O-13-28703 | Itx Corporation only | Barnett (Marble Falls, Oil) | Young | 1 | 14.3K | 205K | Dec 1993 – Aug 2023 |
| Garrett O-13-16200 | Pop Operating Company only | Markley, SE. (Marble Falls) | Young | 4 | 14K | 116K | by Jan 1993 – Aug 2026 |
| Senters 4 Unit G-13-176090 | Itx Corporation only | Gahagan (Marble Falls, I) | Young | 1 | 13.5K | 382K | Nov 1999 – Aug 2026 |
| Senters 3 Unit G-13-175402 | Itx Corporation only | Gahagan (Marble Falls, I) | Young | 1 | 10.6K | 344K | Nov 1999 – Aug 2026 |
| Downey, Mary Clark O-13-29887 | Karper Oil & Gas Corporation only | Karran, North (Marble Falls) | Young | 1 | 10.5K | 3.11K | Apr 2001 – Dec 2014 |
| Barnett No. 1 Unit O-13-28677 | Itx Corporation only | Barnett (Marble Falls, Oil) | Young | 2 | 10K | 127K | Sep 1993 – Aug 2026 |
| Price, Ann O-13-21903 | Case Resources, LLC only | Price(marble Falls Conglomerate) | Young | 1 | 8.88K | 26.7K | by Jan 1993 – Dec 2018 |
| Byerly-Akers "189" O-13-29959 | Gannett Operating LLC only | Karran, North (Marble Falls) | Young | 1 | 8.75K | 47.9K | Nov 2001 – Sep 2016 |
| Barnett No. 5 Unit O-13-29094 | Itx Corporation only | Barnett (Marble Falls, Oil) | Young | 1 | 7.63K | 62.5K | Feb 1996 – Aug 2026 |
| Stinson O-13-33318 | Robuck Petroleum, LLC only | Graham, SE. (Marble Falls Lime) | Young | 1 | 4.95K | 66.4K | Oct 2015 – Aug 2026 |
| Peterson B Unit O-13-32803 | Bay Rock Operating Company only | Markley,s. (Marble Falls) | Young | 1 | 4.85K | 49.8K | Jul 2012 – Aug 2026 |
| Senters 2 Unit G-13-179256 | Itx Corporation only | Gahagan (Marble Falls, I) | Young | 1 | 4.83K | 117K | Jul 2000 – Aug 2026 |
| Kisinger Unit O-13-32383 | Stovall Operating Co. only | Alco (Marble Falls) | Young | 1 | 4.8K | 53.9K | Dec 2012 – Aug 2026 |
| Ferguson, Pauline O-13-16905 | 2MC Consulting LLC only | Phillips (Marble Falls) | Young | 2 | 4.55K | 9.51K | by Jan 1993 – Aug 2026 |
| Sanders, A.G.-a- No. 1 Unit O-13-29111 | Itx Corporation only | Barnett (Marble Falls, Oil) | Young | 1 | 4.45K | 17.7K | Mar 1996 – Aug 1999 |
| Robertson, Wilmoth -B- O-13-25520 | Perry Operating Inc. only | Graham, North (Marble Falls) | Young | 1 | 4.07K | 7.08K | by Jan 1993 – Aug 2026 |
| Sanders, A.G. -a- 3 Unit O-13-29949 | Itx Corporation only | Barnett (Marble Falls, Oil) | Young | 1 | 3.92K | 17.1K | Sep 2001 – Aug 2026 |
| Stewart G-13-172740 | Walsh & Watts, Inc. only | Markley, SE. (Marble Falls) | Young | 1 | 3.78K | 30.1K | Apr 1999 – May 2011 |
| Stovall Street O-13-30212 | Stovall Operating Co. only | South Bend, West (Marble Falls) | Young | 1 | 3.39K | 72.4K | Sep 2003 – Jul 2025 |
| Holcomb, V. -D- O-13-9500 | Kramer Operating, LLC only | Karran, North (Marble Falls) | Young | 1 | 3.29K | 20 | by Jan 1993 – Aug 2009 |
| Hazelton O-13-25882 | J Ranger Oil & Gas, LLC only | Vaughan (Marble Falls) | Young | 1 | 3.16K | 1.16K | by Jan 1993 – Jul 2026 |
| Stewart -B- O-13-16432 | Walsh & Watts, Inc. only | Markley, SE. (Marble Falls) | Young | 1 | 2.68K | 4.95K | by Jan 1993 – Dec 2001 |
| Eddleman G-13-101063 | Borderline Operating Corp. only | Graham, North (Marble Falls) | Young | 1 | 2.46K | 55.4K | by Jan 1993 – Oct 2001 |
| Donnell, Sallie R. G-13-145304 | Pennzoil Petroleum Company only | Murray (Marble Falls) | Young | 1 | 2.29K | 69.7K | Apr 1993 – Jan 1994 |
| Cearley, Donald G-13-81872 | Itx Corporation only | Reeves (Marble Falls) | Young | 1 | 2.28K | 138K | by Jan 1993 – Aug 2026 |
| Vaughan G-13-99325 | Barnett Energy, Inc. only | Vaughan (Marble Falls) | Young | 1 | 2.26K | 393K | by Jan 1993 – Jul 2026 |
| Graham Williams G-13-296004 | B.O.L.D. Oil and Gas, LLC only | Long Bend (Marble Falls) | Young | 1 | 2.17K | 54.1K | Oct 2023 – Aug 2026 |
| Holcomb, V. -A- O-13-8955 | Kramer, Frank C. only | Karran, North (Marble Falls) | Young | 1 | 2.12K | 21 | by Jan 1993 – Mar 2000 |
| Stewart O-13-24972 | Pop Operating Company only | Stewart (Marble Falls) | Young | 1 | 2.1K | 24K | by Jan 1993 – May 2021 |
| Howeth, F. A. O-13-24317 | Steele, Mark E. only | Price(marble Falls Conglomerate) | Young | 1 | 2.06K | 51.9K | by Jan 1993 – Sep 2018 |
| Stinson O-13-33330 | Robuck Petroleum, LLC only | Bergen (Marble Falls) | Young | 1 | 2.03K | 15K | Aug 2015 – Mar 2018 |
| Phillips, M. T. O-13-23300 | Sundial Resources, Inc. only | Creswell (Marble Falls) | Young | 1 | 1.99K | 18 | by Jan 1993 – Jul 2010 |
| Gilmore-Mabry O-13-17572 | Beren Corporation only | Mabry (Marble Falls) | Young | 1 | 1.88K | 92.8K | by Jan 1993 – Jan 2019 |
| Howeth, F. A. O-13-23841 | Steele, Mark E. only | Steele (Marble Falls Lime) | Young | 2 | 1.76K | 1.17K | by Jan 1993 – Sep 2018 |
| Smith, Mary O-13-28706 | Raylee Operating Company only | Barnett (Marble Falls, Oil) | Young | 1 | 1.58K | 21.4K | Feb 1994 – Feb 2005 |