| Moran, M. E. O-13-14374 | Little, Quintin Company,inc.,the only | McMillan, North (Oil Creek) | Grayson | 1 | 479K | 89.6K | Jan 1993 – Feb 2026 |
| McMillan Unit G-3-169272 | Carrizo Oil & Gas, Inc. only | W. D. McMillan (Yegua 9650) | Wharton | 1 | 381K | 2.61M | Jun 1998 – Mar 2003 |
| Slaughter, Dorothy O-13-14493 | Little, Quintin Company,inc.,the only | McMillan, North (Oil Creek) | Grayson | 2 | 298K | 57.7K | Jan 1993 – Apr 2026 |
| McMillan Sand Unit O-8-13723 | Schkade Bros. Operating Company only | Taylor County Regular | Taylor | 23 | 222K | 34 | Jan 1993 – Aug 2018 |
| Neal, C. A. O-13-2839 | Little, Quintin Company,inc.,the only | McMillan, North (Oil Creek) | Grayson | 3 | 183K | 21 | Jan 1993 – Apr 2026 |
| McMillian, W. D. G-3-167641 | Carrizo Oil & Gas, Inc. only | W. D. McMillan (Yegua 9650) | Wharton | 1 | 166K | 3.15M | Apr 1998 – Nov 2001 |
| Thorn, Joe B. O-13-2840 | Little, Quintin Company,inc.,the only | McMillan, North (Oil Creek) | Grayson | 4 | 126K | 5.86K | Jan 1993 – Nov 2022 |
| McMillan, James "A" O-11-66180 | Strawn Petroleum Operating, LLC only | Hermleigh (Strawn) | Scurry | 3 | 113K | 302K | Jan 1993 – Apr 2026 |
| Suddath Brothers O-13-2845 | Felderhoff Production Company only | McMillan (Pennsylvania) | Grayson | 2 | 111K | 133K | Jan 1993 – Apr 2026 |
| McMillan "18" O-11-65128 | Rogers, S. K. Oil, Inc. only | Hamilton (Clearfork) | Hockley | 2 | 110K | 4.31K | Jan 1993 – Apr 2026 |
| Dorothy Hite No. 5 Oil Unit O-3-26805 | Hilcorp Energy Company only | W. D. McMillan (Yegua 9650) | Wharton | 1 | 96.6K | 302K | Sep 2014 – Mar 2020 |
| Hite G-3-176857 | Hilcorp Energy Company only | W. D. McMillan (Yegua 9650) | Wharton | 1 | 94K | 423K | Jan 2000 – Feb 2002 |
| Matthys-McMillan GU O-3-25649 | Hilcorp Energy Company only | W. D. McMillan (Yegua 9650) | Wharton | 1 | 78.6K | 291K | Aug 2010 – Apr 2020 |
| Elliott, H. E. O-13-15373 | Felderhoff Production Company only | McMillan (Miller 5950) | Grayson | 1 | 51.8K | 24 | Jan 1993 – Apr 2026 |
| Kresta G-3-198554 | CML Exploration, LLC only | W. D. McMillan (Yegua 9650) | Wharton | 1 | 38.2K | 350K | Aug 2003 – Dec 2004 |
| McMillan, Versie O-11-61984 | Unitex Oil & Gas, L.L.C. only | Sharon Ridge (1700) | Mitchell | 11 | 38.1K | 121 | Jan 1993 – Apr 2026 |
| McMillan 30 Unit O-10-42503 | Laredo Petroleum, Inc. only | Garden City, S. (Wolfcamp) | Glasscock | 1 | 33.1K | 542K | Oct 2011 – May 2013 |
| W.D. McMillan G-3-288696 | Ricochet Energy, Inc. only | W. D. McMillan (Yegua 9650) | Wharton | 1 | 32.7K | 649K | Dec 2019 – Feb 2022 |
| McMillan, W. D. G-3-179557 | Forest Oil Corporation only | W. D. McMillan (Yegua 9650) | Wharton | 1 | 28.9K | 157K | Sep 2000 – Dec 2001 |
| McMillan, Bruce Jr. Foundation O-6-10953 | McBride Operating LLC only | Shea (Dorsey) | Rusk | 1 | 27.1K | 141 | Jan 1993 – Apr 2026 |
| McMillan "A" O-11-64813 | Unitex Oil & Gas, L.L.C. only | Sharon Ridge (1700) | Mitchell | 5 | 23.3K | 74 | Jan 1993 – Apr 2026 |
| Kubacak -B- O-8-32489 | 3 S Production, Inc. only | Bacon (McMillan 3140) | Taylor | 1 | 22.3K | 0 | Sep 2019 – Apr 2026 |
| Kubacak O-8-32219 | 3 S Production, Inc. only | Bacon (McMillan 3140) | Taylor | 2 | 22.3K | 0 | Mar 2018 – Apr 2026 |
| McMillan O-11-65397 | Cockrell Production Co., Inc. only | Hermleigh (Strawn) | Scurry | 2 | 22.2K | 57K | Jan 1993 – Sep 2009 |
| Moran, J. E. O-13-2836 | BMR Operating LLC only | McMillan, East (Strawn) | Grayson | 1 | 21.8K | 120 | Jan 1993 – Aug 2025 |
| McMillan G-3-204746 | Forest Oil Corporation only | W. D. McMillan (Yegua 9650) | Wharton | 1 | 18.1K | 474K | Apr 2004 – Sep 2007 |
| Price, Faye O-13-2835 | Silver Creek Oil & Gas, LLC only | McMillan, East (Oil Creek Sand) | Grayson | 2 | 18K | 6.83K | Jan 1993 – Jul 2005 |
| Reeves-McMillan G-6-30188 | TGNR Panola LLC only | Carthage (Pettit, Lower Gas) | Panola | 1 | 16.9K | 1.11M | Jan 1993 – Apr 2026 |
| McMillan B Don F G-3-95494 | Hilcorp Energy Company only | Katy (Wilcox Cons.) | Fort Bend | 1 | 16.7K | 1.36M | Jan 1993 – Sep 2022 |
| McMillan 30 Unit G-10-270080 | Crescent Energy Operating, LLC only | Garden City, S. (Wolfcamp) | Glasscock | 1 | 16.6K | 706K | Jun 2013 – Apr 2026 |
| Big State 2 McMillan O-9-8309 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 16.3K | 1.33K | Jan 1993 – Apr 2026 |
| Caza-McMillan G-3-264455 | Hilcorp Energy Company only | W. D. McMillan (Yegua 9650) | Wharton | 1 | 15.1K | 620K | Dec 2011 – Feb 2016 |
| McMillan, J. L. O-11-66081 | Cockrell Production Co., Inc. only | Hermleigh (Strawn) | Scurry | 1 | 14.2K | 21.3K | Jan 1993 – May 2002 |
| McMillan 15 O-8-28103 | Midland Oil and Gas, Inc. only | Campo Grande (Canyon Reef) | Stonewall | 1 | 13.2K | 6.82K | Feb 1997 – Dec 2003 |
| McMillan, A. J., Unit O-6-5021 | Merit Energy Company only | Pittsburg (Sub-Clarksville -B-) | Camp | 1 | 13.1K | 21 | Jan 1993 – Jan 1999 |
| McMillan, Reva O-9-7530 | Bomar Operating Co., LC only | Mim. NW (San Angelo) | Irion | 4 | 12.2K | 8 | Jan 1993 – Jan 2001 |
| Furrh-McMillan G-6-30165 | TGNR Panola LLC only | Carthage (Pettit, Lower Gas) | Panola | 1 | 11.6K | 744K | Jan 1993 – May 2022 |
| Ford, Harold O-8-13403 | Red-Tex Petroleum, Inc. only | Jeanne (McMillan) | Taylor | 5 | 10.7K | 41 | Jan 1993 – Nov 1997 |
| McMillan O-9-8744 | Windham Resources only | Crews, South (Fry, Lo.) | Runnels | 1 | 8.97K | 35.2K | Jan 1993 – Feb 2006 |
| Kubacak 'A' O-8-32300 | 3 S Production, Inc. only | Bacon (McMillan 3140) | Taylor | 1 | 8.71K | 0 | Nov 2018 – Apr 2026 |
| Furrh-McMillan Unit G-6-235198 | Agis Energy LLC only | Carthage (Cotton Valley) | Panola | 1 | 8.62K | 459K | Apr 2008 – Sep 2018 |
| Moran, J. E. "A" O-13-29845 | Brammer Petroleum, Inc. only | McMillan, North (Oil Creek) | Grayson | 1 | 7.38K | 39.2K | Dec 2000 – Aug 2025 |
| McMillan, Kate G-6-30182 | TGNR Panola LLC only | Carthage (Pettit, Lower Gas) | Panola | 1 | 6.75K | 776K | Jan 1993 – Jan 2023 |
| McMillan, Reva K. O-9-10730 | Tejas Jack Sales, Inc. only | Brooks (Canyon K) | Irion | 1 | 6.61K | 240K | Jan 1993 – Apr 2016 |
| McMillan G-3-123782 | Seneca Resources Corporation only | Jerry's Quarters (A C 11900) | Burleson | 1 | 3.54K | 240K | Jan 1993 – Jun 1999 |
| WLM Trust-Wilbeck Unit G-3-188257 | Forest Oil Corporation only | W. D. McMillan (Yegua 9650) | Wharton | 1 | 3.39K | 55K | Mar 2002 – Jun 2008 |
| Matthys-McMillan GU G-3-238178 | Hilcorp Energy Company only | Wharton, West (Wilcox) | Wharton | 1 | 2.7K | 3.34M | Jul 2007 – Jun 2019 |
| McMillan G-3-127130 | Seneca Resources Corporation only | Jerry's Quarters (A C 11900) | Burleson | 1 | 1.39K | 90.6K | Jan 1993 – May 1998 |
| McMillan, W. B. G-9-123631 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 1.28K | 348K | Jan 1993 – Apr 2026 |
| Rudd-McMillan O-6-14510 | Wilcox Operating Corporation only | Longwood (Goodland Lime) | Harrison | 1 | 1.02K | 32.8K | May 2014 – Oct 2019 |