| Mfe Unit O-10-33264 | Fasken Oil and Ranch, Ltd. only | M.F.E. (Grayburg) | Andrews | 52 | 4.19M | 835K | Jan 1993 – Apr 2026 |
| Gray, Columbus Etal O-10-1719 | Basin Oil & Gas Operating, LLC only | Fuhrman-Mascho | Andrews | 161 | 1.7M | 951K | Jan 1993 – Apr 2026 |
| Serio (Grayburg)unit O-10-37270 | Fasken Oil and Ranch, Ltd. only | Serio (Grayburg) | Andrews | 52 | 1.54M | 159K | May 2004 – Mar 2026 |
| Fee -Y- O-10-23655 | Fasken Oil and Ranch, Ltd. only | Serio (Grayburg) | Andrews | 34 | 1.43M | 210K | Jan 1993 – Mar 2026 |
| Midland Farms NO Grby UT O-10-9893 | Fasken Oil and Ranch, Ltd. only | Midland Farms, North (Grayburg) | Andrews | 71 | 1.38M | 77.1K | Jan 1993 – Jun 2024 |
| University/Energen Grayburg Unit O-10-37100 | Libertad Operating LLC only | Block 2 (Grayburg) | Andrews | 33 | 919K | 0 | Jul 2003 – Mar 2026 |
| Triple-N /Grayburg/ Cons. O-10-21159 | Ring Energy, Inc. only | Triple-N (Grayburg) | Andrews | 80 | 811K | 340K | Jan 1993 – Apr 2026 |
| Fasken O-10-23406 | Fasken Oil and Ranch, Ltd. only | Serio (Grayburg) | Andrews | 8 | 397K | 39K | Jan 1993 – Mar 2016 |
| Gray, Columbus O-10-36975 | Basin Oil & Gas Operating, LLC only | Deep Rock (Penn.) | Andrews | 5 | 392K | 136K | Sep 2002 – Apr 2026 |
| University O-10-35931 | Energen Resources Corporation only | Block 2 (Grayburg) | Andrews | 4 | 382K | 0 | Nov 1998 – Jun 2003 |
| University -198- O-10-20292 | XTO Energy Inc. only | Triple-N (Grayburg) | Andrews | 6 | 371K | 169K | Jan 1993 – Jan 2023 |
| Parker, J. E. -P- (Amoco) O-10-17903 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 9 | 352K | 91.8K | Jan 1993 – Apr 2026 |
| Fee -J- O-10-12602 | Fasken Oil and Ranch, Ltd. only | Block 2 (Grayburg) | Andrews | 9 | 284K | 15.3K | Jan 1993 – Apr 2026 |
| Means, J. S. a/C 4 O-10-34132 | Hilcorp Energy Company only | Means, S. (Grayburg) | Andrews | 2 | 280K | 30.3K | Jan 1994 – Apr 2026 |
| State University -At- O-10-36772 | XTO Energy Inc. only | Triple-N (Grayburg) | Andrews | 4 | 242K | 105K | Sep 2001 – Apr 2026 |
| University -K- O-10-12803 | Burgundy Oil & Gas, Inc. only | Triple-N (Grayburg) | Andrews | 2 | 234K | 37K | Jan 1993 – Apr 2026 |
| State University BA O-10-36900 | XTO Energy Inc. only | Triple-N (Grayburg) | Andrews | 6 | 195K | 73.4K | Mar 2002 – Dec 2023 |
| Ring University O-10-13698 | Energen Resources Corporation only | Block 2 (Grayburg) | Andrews | 5 | 194K | 18 | Jan 1993 – Jun 2003 |
| Fasken/Energen Grayburg Unit O-10-37101 | Libertad Operating LLC only | Block 2 (Grayburg) | Andrews | 15 | 183K | 0 | Apr 2003 – Mar 2026 |
| Parker-State O-10-34502 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 1 | 181K | 93.8K | May 1995 – Apr 2026 |
| Parker, J. E. "F" O-10-34358 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 2 | 169K | 37.4K | Dec 1994 – Apr 2026 |
| Gray, Columbus, Etal O-10-1637 | Basin Oil & Gas Operating, LLC only | Fuhrman (Glorieta) | Andrews | 4 | 143K | 55.3K | Jan 1993 – Apr 2026 |
| Fasken, David "28" O-10-23963 | Tema Oil and Gas Company only | Serio (Grayburg) | Andrews | 4 | 142K | 13.7K | Jan 1993 – Apr 2004 |
| Parker, J. E. "X" O-10-34238 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 3 | 138K | 37.2K | Aug 1994 – Apr 2026 |
| Parker, J. E. -H- (Amoco) O-10-17902 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 14 | 132K | 53.4K | Jan 1993 – Apr 2026 |
| Parker, J.E. "F" O-10-23793 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 3 | 131K | 38.4K | Jan 1993 – Apr 2026 |
| Parker, J. E. -N- O-10-23087 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 2 | 119K | 17.3K | Jan 1993 – Apr 2026 |
| Fasken O-10-28081 | Energen Resources Corporation only | Midland Farms, North (Grayburg) | Andrews | 4 | 118K | 1.54K | Jan 1993 – Mar 2003 |
| Armstrong, Eliz. O-10-17908 | Reverence Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 3 | 115K | 20 | Jan 1993 – Apr 2026 |
| Parker -A- O-10-26075 | Reverence Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 2 | 106K | 18.6K | Jan 1993 – Apr 2026 |
| Atlantic-Univ. O-10-12251 | Energen Resources Corporation only | Block 2 (Grayburg) | Andrews | 7 | 92.7K | 1.58K | Jan 1993 – Jun 2003 |
| Parker 18 O-10-51355 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 1 | 91.1K | 24.6K | Feb 2019 – Apr 2026 |
| Fasken BLK -EE- O-10-30451 | Energen Resources Corporation only | Block 2 (Grayburg) | Andrews | 6 | 89.7K | 21 | Jan 1993 – Mar 2003 |
| Parker, J. E. "Q" O-10-23336 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 3 | 81.8K | 15.4K | Jan 1993 – Apr 2026 |
| Parker, J.E. "P" O-10-28994 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 2 | 80.9K | 28.2K | Jan 1993 – Jan 2022 |
| Ford, H. M. O-10-18241 | Grace Petroleum Operating, LLC only | Parker (Grayburg, San Andres) | Andrews | 5 | 77.2K | 52 | Jan 1993 – Apr 2026 |
| Doelling, Bessie Lou O-10-34554 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 2 | 75.5K | 21.9K | Jul 1995 – Apr 2026 |
| Parker "C" O-10-28596 | Reverence Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 2 | 74.1K | 20 | Jan 1993 – Apr 2026 |
| Parker, J. E. -T- (Amoco) O-10-17905 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 1 | 54.3K | 20.3K | Jan 1993 – Apr 2026 |
| Parker, J. E. -U- O-10-17906 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 1 | 52.1K | 20.4K | Mar 1993 – Apr 2026 |
| Parker 2 O-10-51364 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 1 | 50.6K | 17.1K | Jun 2019 – Apr 2026 |
| Parker, J. E. -A-TR O-10-22240 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 1 | 42.8K | 18.2K | Jan 1993 – Apr 2026 |
| Parker, J. E. "D" O-10-34619 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 1 | 40.7K | 37.6K | Aug 1995 – Jun 2016 |
| Parker, J. E. O-10-20971 | Remuda Operating Company only | Parker (Grayburg, San Andres) | Andrews | 1 | 34.5K | 1.84K | Jan 1993 – Mar 2026 |
| Cowden, Emma O-10-26134 | Crescent Energy Operating, LLC only | Emma (Grayburg) | Andrews | 9 | 32.3K | 22 | Jan 1993 – Jul 2017 |
| Parker, J. E. "T" O-10-23603 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 1 | 31.1K | 13.3K | Jan 1993 – Apr 2026 |
| Walker O-10-31350 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 1 | 23.6K | 14.6K | Jan 1993 – Sep 2020 |
| FX O-10-35956 | Sheridan Production Company, LLC only | Triple-N (Grayburg) | Andrews | 2 | 20K | 424 | Jan 1999 – Feb 2013 |
| University O-10-30416 | Energen Resources Corporation only | Midland Farms, North (Grayburg) | Andrews | 1 | 20K | 254 | Jan 1993 – Jun 2003 |
| Parker, J.E. Fee "K" O-10-24563 | Morningstar Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 2 | 17.7K | 2.85K | Jan 1993 – Feb 2008 |