| McClellan-Wilson O-13-26925 | Corda Corporation only | Lawler (Chappel) | Hardeman | 1 | 409K | 19 | by Jan 1993 – Aug 2026 |
| McClellan, Joe O-13-29389 | Corda Corporation only | Medicine Mounds, SE (Miss) | Hardeman | 1 | 323K | 0 | Sep 1997 – Aug 2026 |
| McClellan B O-13-27019 | Decleva, Paul only | Lawler (Chappel) | Hardeman | 1 | 71.2K | 19 | by Jan 1993 – Dec 2014 |
| McClelland G-2-142820 | Marwell Petroleum Ltd Partnrship only | Oakville (Wilcox Cons.) | Live Oak | 1 | 60.1K | 3.51M | by Jan 1993 – Aug 2026 |
| McClellan-Swofford Unit O-13-30128 | Corda Corporation only | Medicine Mounds, SE (Miss) | Hardeman | 1 | 57.8K | 0 | Feb 2003 – Aug 2026 |
| McClelland, J.W. et al Gas Unit G-2-101451 | OXY USA Inc. only | Limes (Wilcox 9900) | Live Oak | 1 | 53K | 1.95M | by Jan 1993 – Nov 2011 |
| McClellan, Joe D. O-13-12862 | Buffco Production Inc. only | Medicine Mounds (Congl. 7430) | Hardeman | 2 | 49.7K | 21 | by Jan 1993 – Aug 2026 |
| J.W. McClelland et al Unit #1 G-2-149008 | Sandel Operating Company only | Limes (Wilcox F-1) | Live Oak | 1 | 43.2K | 2.36M | Mar 1994 – Aug 2026 |
| McClellan /S & T/ O-1-1210 | Can't Complain Operating Co. only | Minerva-Rockdale | Milam | 22 | 41.3K | 100 | by Jan 1993 – Aug 2026 |
| McClelland G-2-106489 | Marwell Petroleum Ltd Partnrship only | Oakville (Wilcox Cons.) | Live Oak | 1 | 41.2K | 3.17M | by Jan 1993 – Aug 2026 |
| McClelland G-2-178937 | Marwell Petroleum Ltd Partnrship only | Oakville (Wilcox Cons.) | Live Oak | 1 | 38.2K | 2.83M | Jun 2000 – Aug 2026 |
| McClellan, Joe D. O-13-12236 | Buffco Production Inc. only | Medicine Mounds (Miss.) | Hardeman | 1 | 37.1K | 21 | by Jan 1993 – Jul 2016 |
| Percival O-14-97 | McClelland Creek Properties,inc. only | Panhandle Carson County Field | Carson | 5 | 35.4K | 51.8K | by Jan 1993 – Aug 2026 |
| McClelland, J. W. G-2-148411 | Pogo Producing Company LLC only | Limes (Wilcox F-1) | Live Oak | 1 | 31.3K | 1.12M | Dec 1993 – Nov 2004 |
| McClelland G. U. "B" G-2-95340 | Marwell Petroleum Ltd Partnrship only | Oakville (Wilcox Cons.) | Live Oak | 1 | 29.3K | 2.28M | by Jan 1993 – Aug 2026 |
| McClelland G-2-98082 | Marwell Petroleum Ltd Partnrship only | Oakville (Wilcox Cons.) | Live Oak | 1 | 27.9K | 708K | by Jan 1993 – Aug 2026 |
| Moore-Langdon O-14-703 | McClelland Creek Properties,inc. only | Panhandle Hutchinson County Fld. | Hutchinson | 9 | 27.6K | 41.3K | by Jan 1993 – Mar 2024 |
| McClelland G-2-89642 | Marwell Petroleum Ltd Partnrship only | Oakville (Wilcox Cons.) | Live Oak | 1 | 26.3K | 2.53M | by Jan 1993 – Aug 2026 |
| Pitcher O-14-959 | McClelland Creek Properties,inc. only | Panhandle Hutchinson County Fld. | Hutchinson | 13 | 23.9K | 81.6K | by Jan 1993 – Mar 2024 |
| McClelland, J.W. G-2-151818 | Pogo Producing Company LLC only | Limes (Wilcox F-1) | Live Oak | 1 | 21.6K | 1.09M | Sep 1994 – Aug 1997 |
| McClelland "C" G-2-99695 | Marwell Petroleum Ltd Partnrship only | Oakville (Wilcox Cons.) | Live Oak | 1 | 21K | 277K | by Jan 1993 – Aug 2026 |
| McClelland G-2-159385 | Marwell Petroleum Ltd Partnrship only | Oakville (Wilcox Cons.) | Live Oak | 1 | 20.3K | 854K | Jul 1996 – Sep 2009 |
| McClellan O-13-30491 | Buffco Production Inc. only | Medicine Mounds (Congl. 7430) | Hardeman | 1 | 19.7K | 0 | Sep 2004 – Aug 2026 |
| Percival -A- O-14-32 | McClelland Creek Properties,inc. only | Panhandle Carson County Field | Carson | 2 | 18.2K | 18.8K | by Jan 1993 – Aug 2026 |
| McClellan "A" O-14-5377 | Sandlot Oil & Gas LLC only | Gruver, NW (Morrow, UP) | Hansford | 1 | 17.8K | 13K | by Jan 1993 – Aug 2026 |
| McClellan O-13-34258 | Trio Consulting & Management,llc only | Searcys (Miss) | Hardeman | 1 | 17.6K | 0 | Jan 2024 – Aug 2026 |
| J. W. McClelland G. U. #2 G-2-148924 | Awp Operating Company only | Limes (Wilcox 9500) | Live Oak | 1 | 15.5K | 523K | Jan 1994 – Dec 1997 |
| Heidaja O-14-4824 | McClelland Creek Properties,inc. only | Panhandle Gray County Field | Gray | 3 | 14.8K | 1.02M | by Jan 1993 – Jul 2026 |
| Sheridan O-14-4802 | McClelland Creek Properties,inc. only | Panhandle Gray County Field | Gray | 2 | 14.6K | 410K | by Jan 1993 – Jul 2024 |
| Chrisga O-14-4759 | McClelland Creek Properties,inc. only | Panhandle Gray County Field | Gray | 8 | 14.6K | 545K | by Jan 1993 – Aug 2026 |
| Langham O-14-4862 | McClelland Creek Properties,inc. only | Panhandle Gray County Field | Gray | 1 | 13.8K | 77.9K | by Jan 1993 – Jul 2026 |
| Percival-Gamar O-14-173 | McClelland Creek Properties,inc. only | Panhandle Carson County Field | Carson | 2 | 13.4K | 42.6K | by Jan 1993 – Aug 2026 |
| McClelland G-2-159375 | Marwell Petroleum Ltd Partnrship only | Oakville (Wilcox Cons.) | Live Oak | 1 | 12.8K | 1.05M | Jul 1996 – Mar 2021 |
| McClelland "C" G-2-145721 | Wagner Oil Company only | Oakville (Wilcox Cons.) | Live Oak | 1 | 12.4K | 766K | Jun 1993 – Feb 2003 |
| McClellan -C- O-1-1209 | Can't Complain Operating Co. only | Minerva-Rockdale | Milam | 9 | 10.9K | 100 | by Jan 1993 – Jul 2026 |
| McClelland G-2-182799 | Wagner Oil Company only | Oakville (Wilcox Cons.) | Live Oak | 1 | 10.5K | 836K | Jan 2001 – Jun 2018 |
| Block, B. F. O-14-76 | McClelland Creek Properties,inc. only | Panhandle Carson County Field | Carson | 3 | 10.2K | 56.8K | by Jan 1993 – Aug 2026 |
| McClellan G-14-146793 | McGee, Tom Corporation only | Gruver, NW (Morrow, UP) | Hansford | 1 | 9.99K | 146K | Aug 1993 – Feb 2021 |
| Benedict O-14-3416 | McClelland Creek Properties,inc. only | Panhandle Gray County Field | Gray | 1 | 9.94K | 21 | by Jan 1993 – Aug 2026 |
| Kajanca O-14-4751 | McClelland Creek Properties,inc. only | Panhandle Gray County Field | Gray | 6 | 9.84K | 471K | by Jan 1993 – Aug 2026 |
| McClelland "C" G-2-101274 | Wagner Oil Company only | Oakville (Wilcox Cons.) | Live Oak | 1 | 9.36K | 675K | by Jan 1993 – Mar 2008 |
| McCray, C. E., et UX O-14-1564 | McClelland Creek Properties,inc. only | Panhandle Carson County Field | Carson | 5 | 9.26K | 199K | by Jan 1993 – Jun 2026 |
| Stevenson, Mittie O-14-1341 | McClelland Creek Properties,inc. only | Panhandle Hutchinson County Fld. | Hutchinson | 5 | 9.11K | 235K | by Jan 1993 – Sep 2025 |
| McClellan-Phillips O-13-29790 | Ashtola Exploration Company,inc. only | Kadane Cato (Congl) | Hardeman | 1 | 8.7K | 16.7K | Aug 2000 – Sep 2002 |
| Cobb O-14-4965 | McClelland Creek Properties,inc. only | Panhandle Gray County Field | Gray | 3 | 8.66K | 614K | by Jan 1993 – Aug 2026 |
| J. W. McClelland G. U. #2 G-2-267641 | Sandel Operating Company only | Oakville (Wilcox Cons.) | Live Oak | 1 | 7.92K | 571K | Jan 2012 – Aug 2026 |
| McClelland, J. W. G-2-154210 | Samson Lone Star LP only | Limes (Wilcox 7900) | Live Oak | 1 | 7.42K | 633K | Dec 1994 – Dec 1996 |
| McClelland, Dr. G.A. Etal GU G-6-156261 | Buffco Production Inc. only | Glenwood (Cotton Valley) | Upshur | 1 | 6.75K | 566K | Nov 1995 – May 2026 |
| McClelland O-2-9650 | Dewbre Petroleum Corporation only | Oakville (Pettus -C-) | Live Oak | 1 | 6.45K | 0 | Jul 2011 – Sep 2016 |
| McClelland, J.W. O-2-8070 | Samson Resources Company only | Limes (Wilcox 7900) | Live Oak | 1 | 6.42K | 2.35K | May 1994 – Oct 1994 |