| Southland O-10-30038 | Legacy Reserves Operating LP only | Howard Glasscock (Clear Fork,mi) | Howard | 4 | 197K | 21 | by Jan 1993 – Nov 2011 |
| Southland Trull O-3-21884 | KD Energy, LLC only | Pheasant, SW. (8150 B-1) | Matagorda | 2 | 143K | 239K | by Jan 1993 – Jul 2026 |
| Southland Royalty O-6-11641 | Samedan Oil Corporation only | Rodessa, NW. (Dees, Upper) | Cass | 2 | 139K | 188K | by Jan 1993 – Jun 1999 |
| Southland "A" O-10-30976 | Legacy Reserves Operating LP only | Howard Glasscock (Clear Fork,mi) | Howard | 2 | 126K | 21 | by Jan 1993 – Nov 2011 |
| Southland O-3-25357 | IV Standard, LLC only | Goodrich | Polk | 1 | 91.6K | 18.8K | Mar 2009 – Aug 2026 |
| Southland Royalty O-10-13135 | Garrd Oil Company LLC only | Pecos Valley (Permian, Lower) | Pecos | 1 | 88.1K | 151K | by Jan 1993 – Aug 2026 |
| Southland Royalty -C- O-10-16023 | Highmark Energy Operating, LLC only | Deep Rock, South (Wolfcamp) | Andrews | 1 | 72.5K | 7.83K | by Jan 1993 – Feb 2026 |
| Southland O-13-33027 | Flintlock Exploration, LLC only | Big Mineral Creek (Woodford) | Grayson | 1 | 68K | 587K | Apr 2013 – Aug 2026 |
| Southland O-10-41671 | R2Q Operating LLC only | Howard Glasscock (Consolidated) | Howard | 4 | 66.2K | 0 | Dec 2011 – Aug 2026 |
| Southland Paper Mills G-3-188838 | Zarvona Energy LLC only | Seven Oaks, N. (Woodbine) | Polk | 1 | 59.5K | 3.18M | Aug 2001 – Aug 2026 |
| Southland-Noble O-9-15093 | Apache Corporation only | Wyatt | Crockett | 1 | 57.4K | 0 | Dec 2000 – May 2008 |
| Southland Paper Mills O-3-23295 | Texas Operating Partners LLC only | Copeland Creek, East | Polk | 1 | 51.2K | 0 | Aug 1997 – May 2026 |
| Southland -B- O-10-31198 | Legacy Reserves Operating LP only | Howard Glasscock (Clear Fork,mi) | Andrews | 3 | 48.2K | 21 | by Jan 1993 – Oct 2011 |
| Southland Royalty -C- O-10-32033 | Highmark Energy Operating, LLC only | Wallen (San Andres) | Andrews | 1 | 40.6K | 8.85K | by Jan 1993 – Aug 2026 |
| Southland Royalty Co. O-11-2953 | Chevron U. S. A. Inc. only | Jenkins (San Andres) | Gaines | 8 | 36.8K | 18.1K | by Jan 1993 – Nov 1993 |
| Southland-L.ballard Heirs O-6-11729 | Samedan Oil Corporation only | Rodessa, NW. (Dees, Upper) | Cass | 2 | 35.3K | 30.4K | by Jan 1993 – Jun 1999 |
| Southland "A" O-10-41672 | R2Q Operating LLC only | Howard Glasscock (Consolidated) | Howard | 2 | 31K | 0 | Dec 2011 – Aug 2026 |
| Southland Royalty "D" O-10-34938 | Highmark Energy Operating, LLC only | Wallen (San Andres) | Andrews | 1 | 30.8K | 2.82K | Apr 1996 – Aug 2026 |
| Southland -B- O-10-41717 | R2Q Operating LLC only | Howard Glasscock (Consolidated) | Howard | 1 | 28.1K | 0 | Dec 2011 – Aug 2026 |
| Southland -B- O-10-13370 | Walsh & Watts, Inc. only | Snyder | Howard | 18 | 24.2K | 21 | by Jan 1993 – Nov 2003 |
| Southland Paper Company G-6-171999 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 20.9K | 1.65M | Jun 1998 – Aug 2026 |
| Southland O-14-4341 | D10 Energy LLC only | Panhandle Hutchinson County Fld. | Hutchinson | 18 | 20.2K | 923K | by Jan 1993 – Jul 2021 |
| Southland Paper Co. G-6-168329 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 19.8K | 1.44M | Jan 1998 – Aug 2026 |
| Southland Paper Co. G-6-134167 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 19.8K | 1.81M | by Jan 1993 – Aug 2026 |
| Southland Paper Co. G-6-213041 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 19.6K | 1.52M | Jun 2005 – Aug 2026 |
| Southland Paper Co. G-6-209729 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 19.6K | 1.07M | Mar 2005 – Aug 2026 |
| Southland -B- O-14-1643 | Large Operating LLC only | Panhandle Hutchinson County Fld. | Hutchinson | 4 | 19.6K | 146K | by Jan 1993 – Jan 2017 |
| Southland Paper Mills O-3-3093 | Texana Operating Company only | Morgans Creek | Polk | 2 | 19.1K | 339 | by Jan 1993 – Mar 2010 |
| Southland Paper Co. G-6-198637 | Diversified Production LLC only | Carthage (Travis Peak 6450) | Panola | 1 | 19K | 1.81M | Oct 2003 – Jan 2021 |
| Southland Paper Co. G-6-216230 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 18.5K | 1.03M | Nov 2005 – Aug 2026 |
| Southland Paper Co. G-6-134006 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 16.1K | 661K | by Jan 1993 – Aug 2026 |
| Southland Paper Mills G-3-47489 | Iron Ridge Operating, LLC only | Seven Oaks, N. (Woodbine) | Polk | 1 | 15.7K | 921K | by Jan 1993 – Jul 2001 |
| Southland Paper G-6-109203 | Sheridan Production Co III, LLC only | Carthage (Cotton Valley) | Panola | 1 | 15.6K | 536K | by Jan 1993 – Jan 2020 |
| Southland-Scott O-9-4103 | Coppertop only | John Scott (Grayburg) | Reagan | 1 | 15.6K | 10.1K | by Jan 1993 – Aug 2026 |
| Southland Paper Co. G-6-222190 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 15.4K | 1.05M | Jun 2006 – Aug 2026 |
| Southland Paper Co. G-6-140132 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 15.1K | 993K | by Jan 1993 – Aug 2026 |
| Southland Paper Mills G-3-59891 | Iron Ridge Operating, LLC only | Hortense (Woodbine) | Polk | 1 | 14.5K | 1.14M | by Jan 1993 – Oct 2015 |
| Southland -B- O-14-3652 | Large Operating LLC only | Adobe Walls (Penn Lime Upper) | Hutchinson | 1 | 14K | 64 | by Jan 1993 – Sep 2013 |
| Southland Paper Company G-6-231750 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 13.1K | 1.27M | Aug 2007 – Aug 2026 |
| Southland Royalty "A" O-10-25273 | Maralo, Inc. only | Deep Rock (Devonian) | Andrews | 1 | 13K | 19.9K | by Jan 1993 – Sep 1996 |
| Southland Royalty -D- O-10-27692 | Maralo, LLC only | Deep Rock (Penn.) | Andrews | 3 | 13K | 33K | by Jan 1993 – Sep 1998 |
| Southland Paper Company G-6-198211 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 12.9K | 1.4M | Oct 2003 – Aug 2026 |
| Southland Paper Company G-6-142237 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 12.7K | 706K | Mar 1993 – Aug 2026 |
| Southland Royalty -906- O-10-17563 | Reatta Energy, Inc. only | Miller Block B-29 (Penn.) | Ward | 7 | 11.5K | 159K | Jan 2019 – Aug 2026 |
| Southland Life Ins O-4-13032 | Lembcke Oil & Gas LLC. only | Southland (Cole, Lower, E.) | Duval | 2 | 11.4K | 16K | Jun 2001 – Mar 2016 |
| Southland G-4-173399 | Proline Energy Resources Inc only | Southland (Pettus 5300) | Duval | 1 | 11K | 2.14M | May 1999 – Apr 2026 |
| Southland Paper Co. G-6-210317 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 11K | 908K | Apr 2005 – Aug 2026 |
| Southland Paper Company G-6-85305 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 10.8K | 816K | by Jan 1993 – Aug 2026 |
| Roberts, Dora -B- (Southland) O-10-2811 | 5H Oil Co., LLC only | Howard Glasscock | Howard | 3 | 10.7K | 33 | by Jan 1993 – Oct 2011 |
| Southland Paper Mills -A- G-3-187640 | Zarvona Energy LLC only | Hortense (Woodbine) | Polk | 1 | 10.6K | 608K | Dec 2001 – Apr 2026 |