| Pierce Estates, Inc. O-3-4526 | McGowan Working Partners, Inc. | Withers, North | Wharton | 39 | 985K | 289K | by Jan 1993 – Aug 2026 |
| Pierce Estates, Inc. O-3-12650 | McGowan Working Partners, Inc. | Withers, North (-a- Sand) | Wharton | 20 | 517K | 152K | by Jan 1993 – Aug 2026 |
| Pierce Ranch N 4900 Unit O-3-24336 | McGowan Working Partners, Inc. | Pierce Ranch (4900) | Wharton | 14 | 480K | 575K | May 2003 – Aug 2026 |
| Cockburn -B- O-3-2868 | McGowan Working Partners, Inc. | Magnet Withers | Wharton | 12 | 466K | 125K | by Jan 1993 – Aug 2026 |
| Halamicek, J. M. O-3-2906 | McGowan Working Partners, Inc. | Magnet Withers | Wharton | 5 | 327K | 150K | by Jan 1993 – Aug 2026 |
| Pierce Ranch N 4850 Unit O-3-24337 | McGowan Working Partners, Inc. | Pierce Ranch (4850) | Wharton | 7 | 247K | 113K | May 2003 – Aug 2026 |
| Cockburn Unit O-3-16109 | McGowan Working Partners, Inc. | Magnet Withers, E.(frio Lower) | Wharton | 2 | 223K | 31.8K | by Jan 1993 – Apr 2004 |
| East Magnet Withers Frio Unit O-3-2918 | McGowan Working Partners, Inc. | Magnet Withers, E. (Frio) | Wharton | 4 | 194K | 59.7K | Apr 1993 – Aug 2026 |
| Pierce Estate O-3-15059 | McGowan Working Partners, Inc. | Pierce Ranch (4900) | Wharton | 6 | 184K | 203K | by Jan 1993 – Apr 2003 |
| Pierce Estates -E- O-3-11218 | McGowan Working Partners, Inc. | Pierce Ranch (4900) | Wharton | 6 | 155K | 187K | by Jan 1993 – Jan 2001 |
| Etta Wigginton Etal O-3-23521 | McGowan Working Partners, Inc. | Etta (Wiggington) | Wharton | 1 | 138K | 57.3K | Apr 1998 – Jun 2016 |
| Security Bank & Trust Co. O-3-2610 | McGowan Working Partners, Inc. | Lane City | Wharton | 5 | 111K | 53.5K | by Jan 1993 – Jan 2015 |
| Fisk, Wm. O-3-2902 | McGowan Working Partners, Inc. | Magnet Withers | Wharton | 3 | 96.5K | 38K | by Jan 1993 – Dec 2016 |
| Pierce Estate "J" O-3-16480 | McGowan Working Partners, Inc. | Pierce Ranch (4900) | Wharton | 3 | 81K | 92.7K | by Jan 1993 – Apr 2003 |
| Pierce Estates 'J' O-3-16197 | McGowan Working Partners, Inc. | Pierce Ranch (4850) | Wharton | 2 | 49K | 60.4K | by Jan 1993 – Apr 2003 |
| Pierce Estates "E" O-3-11815 | McGowan Working Partners, Inc. | Pierce Ranch (4850) | Wharton | 4 | 28.2K | 39.4K | by Jan 1993 – Apr 2003 |
| Ferguson Oil Unit O-3-17062 | McGowan Working Partners, Inc. | Pierce Ranch (4900) | Wharton | 1 | 24.3K | 28.7K | by Jan 1993 – Aug 2000 |
| Security Bank & Tr. Co. Oil Unit O-3-9756 | McGowan Working Partners, Inc. | Lane City | Wharton | 1 | 13.7K | 2.73K | by Jan 1993 – Sep 1998 |
| Cockburn Unit O-3-24923 | McGowan Working Partners, Inc. | Magnet Withers | Wharton | 1 | 5.94K | 892 | Feb 2005 – Mar 2010 |
| Ferguson Oil Unit O-3-16602 | McGowan Working Partners, Inc. | Pierce Ranch (4850) | Wharton | 1 | 3.48K | 3.6K | by Jan 1993 – Oct 1993 |
| Cockburn, H. C. -B- G-3-40425 | McGowan Working Partners, Inc. | Magnet Withers (Miocene 4200) | Wharton | 1 | 0 | 0 | — |
| Cockburn, H. C. -B- G-3-40426 | McGowan Working Partners, Inc. | Magnet Withers (Mio 4400) | Wharton | 1 | 0 | 0 | — |
| Cockburn, H.C. 'B' G-3-98870 | McGowan Working Partners, Inc. | Magnet Withers (Marginulina 1) | Wharton | 1 | 0 | 19.5K | Jul 2003 – Dec 2007 |
| Pierce -E- G-3-127103 | McGowan Working Partners, Inc. | Pierce Ranch (4700) | Wharton | 1 | 0 | 271K | by Jan 1993 – Jan 2000 |
| Cockburn, H. C. -A- G-3-132752 | McGowan Working Partners, Inc. | Magnet Withers (Marginulina 1) | Wharton | 1 | 0 | 92.7K | by Jan 1993 – Dec 2010 |
| Cockburn, H. C. "A" G-3-157193 | McGowan Working Partners, Inc. | Magnet Withers (Miocene 4000) | Wharton | 1 | 0 | 2.95K | Jun 1995 – Jul 1997 |
| Security Bank & Trust Company G-3-6821 | McGowan Working Partners, Inc. | Lane City (Miocene 4100) | Wharton | 1 | 0 | 0 | — |
| Halamicek, J. M. G-3-52811 | McGowan Working Partners, Inc. | Magnet Withers | Wharton | 1 | 0 | 0 | — |
| Fisk, Wm. G-3-50747 | McGowan Working Partners, Inc. | Magnet Withers (Miocene Upper) | Wharton | 1 | 0 | 0 | — |
| Cockburn, H. C. -B- G-3-69040 | McGowan Working Partners, Inc. | Magnet Withers | Wharton | 1 | 0 | 0 | — |
| Fisk, Wm. G-3-128308 | McGowan Working Partners, Inc. | Magnet Withers (Miocene 4000) | Wharton | 1 | 0 | 7 | Aug 1999 – Aug 1999 |
| Wigginton-Boyd G-3-141814 | McGowan Working Partners, Inc. | Etta (6200) | Wharton | 1 | 0 | 0 | — |
| Lehman G-3-193465 | McGowan Working Partners, Inc. | Magnet Withers (Miocene 4150) | Wharton | 1 | 0 | 143K | Feb 2003 – May 2005 |
| Wigginton, Etta et Al O-3-23441 | McGowan Working Partners, Inc. | Etta (7500) | Wharton | 2 | 0 | 0 | — |
| Emily O-3-24427 | McGowan Working Partners, Inc. | Withers, North (-C- Sand) | Wharton | 1 | 0 | 0 | — |
| H C Cockburn O-3-25615 | McGowan Working Partners, Inc. | Magnet Withers, E. (Frio) | Wharton | 1 | 0 | 0 | — |
| Pierce Estates O-3-23519 | McGowan Working Partners, Inc. | Withers, North | Wharton | 1 | 0 | 0 | — |
| Pierce Estates "E" G-3-106527 | McGowan Working Partners, Inc. | Pierce Ranch (4850) | Wharton | 1 | 0 | 0 | — |
| Pierce Estates G-3-115264 | McGowan Working Partners, Inc. | Withers, North (Marg. 1) | Wharton | 1 | 0 | 0 | — |
| Cockburn, H. C., -A- G-3-7165 | McGowan Working Partners, Inc. | Magnet Withers (Miocene 4200) | Wharton | 1 | 0 | 0 | — |
| Pierce Est. Inc. G-3-8820 | McGowan Working Partners, Inc. | Withers, North (Miocene 4000) | Wharton | 1 | 0 | 0 | — |
| Pierce Estates, Inc. G-3-106819 | McGowan Working Partners, Inc. | Withers, North | Wharton | 1 | 0 | 0 | — |
| Pierce Estates Inc. G-3-120080 | McGowan Working Partners, Inc. | Withers, North (Marg. 1) | Wharton | 1 | 0 | 0 | — |
| Halamicek, J. M. G-3-121799 | McGowan Working Partners, Inc. | Magnet Withers | Wharton | 1 | 0 | 0 | — |
| Cockburn, H. C., -B- O-3-7221 | McGowan Working Partners, Inc. | Magnet Withers (F-10, East) | Wharton | 1 | 0 | 0 | — |
| Pierce Estates -E- O-3-17762 | McGowan Working Partners, Inc. | Pierce Ranch (4800) | Wharton | 1 | 0 | 0 | — |
| Cockburn, H. C., -B- G-3-40338 | McGowan Working Partners, Inc. | Magnet Withers (Marginulina 1) | Wharton | 1 | 0 | 0 | — |