| Pierce Estate "B" G-3-249561 | Ballard Exploration Company,inc. only | Pierce Ridge (Yegua 12150) | Wharton | 1 | 316K | 5.8M | Dec 2008 – Jun 2018 |
| Arco Fee Unit A-121 G-6-151133 | Union Pacific Resources Company only | Brookeland (Austin Chalk, 8800) | Jasper | 1 | 254K | 2.6M | May 1994 – Mar 2000 |
| Vastar Fee Unit A-121 G-6-183208 | Rockstar Production, LLC only | Brookeland (Austin Chalk, 8800) | Jasper | 1 | 118K | 2.2M | May 2001 – Apr 2026 |
| State Tract 706 GU G-4-270130 | Orx Resources, L.L.C. only | Nueces Bay (12150) | Nueces | 1 | 99.9K | 580K | Feb 2013 – Apr 2026 |
| Avary 121 G-10-299896 | Apache Corporation only | Phantom (Wolfcamp) | Ward | 1 | 86.6K | 566K | Jan 2018 – Apr 2026 |
| Rod G-3-250812 | Ballard Exploration Company,inc. only | Pierce Ridge (Yegua 12150) | Wharton | 1 | 86K | 700K | Apr 2009 – Oct 2010 |
| Walker G-3-182406 | Ballard Exploration Company,inc. only | Dyersdale (Wilcox 12100) | Harris | 1 | 16K | 1.4M | Dec 2001 – Dec 2013 |
| Beaurline, A. W. G-4-106082 | Gn&j LLC only | Beaurline (Vicksburg 12100) | Hidalgo | 1 | 11.6K | 920K | Jan 1993 – Nov 2024 |
| Avary 121 G-10-253058 | Callon Petroleum Operating Co only | Haley (Lwr. Wolfcamp-Penn Cons.) | Ward | 1 | 9.71K | 185K | Jan 2007 – Sep 2016 |
| Sartwelle G-2-169741 | Dreyfus, Louis Natural Gas Corp only | Giv'n Take (WX 12150 Sand) | Lavaca | 1 | 9.42K | 1.86M | Apr 1998 – Dec 1999 |
| Legacy Trust A-170 G-2-221117 | Hunt Oil Company only | Giv'n Take (WX 12150 Sand) | Lavaca | 1 | 9.32K | 3.6M | Jun 2006 – Dec 2010 |
| Sealy-Smith "121" G-8-125728 | 3 S Production, Inc. only | John K. (Gray) | Callahan | 1 | 7.15K | 273K | Jan 1993 – Jan 2025 |
| Hall Gas Unit STH G-2-141135 | Hanson Production Company only | Segunda Chanca (12100) | Karnes | 1 | 6.31K | 1.47M | Jan 1993 – Aug 1994 |
| Abney 1215-Abney a (Allocation) G-6-265183 | Diversified Production LLC only | Waskom (Cotton Valley) | Harrison | 1 | 4.75K | 4.27M | May 2011 – Apr 2026 |
| Scottish Rite 121 G-9-255152 | Barrow-Shaver Resources Co. only | Q Man (Canyon Sand) | Reagan | 1 | 4.36K | 394K | Oct 2009 – Apr 2026 |
| Murphey 1219 G-9-163610 | Atropos Exploration Company only | Baker Ranch (Canyon) | Irion | 1 | 3.65K | 58.9K | Jul 1997 – Sep 2018 |
| Npu (Ray 121) G-2-233422 | Paleo Oil Company LLC only | Tulsita-Wilcox (MWC) | Bee | 1 | 3.56K | 2.3M | Oct 2007 – Apr 2026 |
| St. Tr. 520-L, NW/4 G-3-75774 | TR Offshore, LLC only | El Gordo (12100) | Matgrda IS-LB | 1 | 3.41K | 501K | Jan 1993 – May 2010 |
| Gracie -121- G-14-191081 | United Oil & Shale LLC only | Canadian, SE (Douglas) | Hemphill | 1 | 3.23K | 91.5K | Nov 2002 – Apr 2011 |
| Hughes, Charles 1210 C #4 G-9-158432 | Endeavor Energy Resources L.P. only | Spraberry (Trend Area) | Reagan | 1 | 3.11K | 58.5K | May 1996 – Feb 2014 |
| Abney 1215 G-6-258769 | Diversified Production LLC only | Waskom (Cotton Valley) | Harrison | 1 | 3.09K | 4.83M | Jun 2010 – Apr 2026 |
| Jones 121 G-9-141587 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 2.17K | 476K | Jan 1993 – Mar 2026 |
| Jones 121 G-9-147587 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 2.13K | 529K | Nov 1993 – Mar 2026 |
| Jones 121 G-9-152157 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 2.08K | 470K | Dec 1994 – Mar 2026 |
| Abney 1215 G-6-248724 | Diversified Production LLC only | Waskom (Cotton Valley) | Harrison | 1 | 2.08K | 4.44M | Jan 2009 – Apr 2026 |
| Hughes, Charles 1210 "A" G-9-215159 | Diamondback E&P LLC only | Spraberry (Trend Area) | Reagan | 1 | 1.98K | 20K | Mar 2006 – Apr 2025 |
| Jones 121 G-9-76975 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 1.96K | 340K | Jan 1993 – Mar 2026 |
| Gracie -121- G-14-104912 | United Oil & Shale LLC only | Canadian, SE (Douglas) | Hemphill | 1 | 1.95K | 529K | Jan 1993 – Nov 2020 |
| Jones 121 G-9-56851 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 1.91K | 469K | Jan 1993 – Mar 2026 |
| Jones 121 G-9-137845 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 1.9K | 422K | Jan 1993 – Mar 2026 |
| Jones 121 G-9-148267 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 1.81K | 273K | Jan 1994 – Mar 2026 |
| Jones 121 G-9-148265 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 1.8K | 362K | Jan 1994 – Mar 2026 |
| Jones 121 G-9-147588 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 1.79K | 352K | Nov 1993 – Mar 2026 |
| Jones 121 G-9-146381 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 1.64K | 336K | Aug 1993 – Mar 2026 |
| Jones 121 G-9-180232 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 1.64K | 209K | Nov 2000 – Mar 2026 |
| Killam-Hurd-McLean 121 G-4-212938 | Killam Oil Co., Ltd. only | McLean (Wilcox W-18) | Webb | 1 | 1.62K | 3.38M | Apr 2005 – Jul 2025 |
| Gracie -121- G-14-91400 | United Oil & Shale LLC only | Canadian, SE (Douglas) | Hemphill | 1 | 1.56K | 114K | Jan 1993 – Dec 2019 |
| Jones 121 G-9-56783 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 1.29K | 309K | Jan 1993 – Mar 2026 |
| Jones 121 G-9-133884 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 1.27K | 362K | Jan 1993 – Mar 2026 |
| Jones 121 G-9-138553 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 1.24K | 434K | Jan 1993 – Mar 2026 |
| Popp G-3-258200 | Ballard Exploration Company,inc. only | Pierce Ridge (Yegua 12150) | Wharton | 1 | 1.21K | 56.8K | Jan 2010 – Jun 2011 |
| Lehrer-Davies G.U. G-3-156947 | Gruy Petroleum Management Co. only | Graceland (Hayes 12180) | Colorado | 1 | 1.06K | 514K | Dec 1995 – Dec 2001 |
| Hughes, Charles "1210C" G-9-158434 | Endeavor Energy Resources L.P. only | Spraberry (Trend Area) | Reagan | 1 | 1.04K | 34.3K | May 1996 – Dec 2002 |
| Hall Gas Unit G-2-149015 | Hanson Production Company only | Segunda Chanca (12100) | Karnes | 1 | 900 | 192K | Oct 1993 – Jul 1994 |
| Lyon Gas Unit 121 G-14-221233 | Complete Oil & Gas Services, LLC only | Hansford (Morrow, Upper) | Hansford | 1 | 859 | 314K | Apr 2006 – Feb 2018 |
| Abney 1215 G-6-261372 | Diversified Production LLC only | Waskom (Cotton Valley) | Harrison | 1 | 707 | 4.68M | Feb 2011 – Apr 2026 |
| Jones 121 G-9-76988 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 616 | 188K | Jan 1993 – Mar 2026 |
| Jones 121 G-9-137094 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 521 | 203K | Jan 1993 – Mar 2026 |
| Jones 121 G-9-147584 | Robert C. Brower, LLC only | Sawyer (Canyon) | Sutton | 1 | 478 | 217K | Nov 1993 – Mar 2026 |
| Pennington "121" G-14-194128 | Unit Petroleum Company only | Rita Ranch (Morrow Upper) | Roberts | 1 | 467 | 956K | Apr 2003 – Dec 2008 |