| O'Connor, Thomas -C- O-2-2876 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 59 | 2.99M | 2.17M | by Jan 1993 – Aug 2026 |
| Galveston 215 G-3-208232 | Emerald Gather and Trans, LLC only | Galveston 220-L (5790) | Galveston-LB | 1 | 2.36M | 3.26M | Oct 2004 – Jul 2026 |
| Gordon, M. G. O-11-60033 | White Rock Oil & Gas, LLC only | Slaughter (Clear Fork 7190) | Hockley | 14 | 2.23M | 420K | by Jan 1993 – Aug 2026 |
| Barnett 90-TTT-B01 WF O-10-46909 | Matador Production Company only | Phantom (Wolfcamp) | Loving | 8 | 2.12M | 13.1M | Sep 2014 – Aug 2026 |
| UL Maroon 0904-21 O-10-51854 | WPX Energy Permian, LLC only | Phantom (Wolfcamp) | Winkler | 3 | 1.98M | 3.05M | Nov 2018 – Aug 2026 |
| Billy Burt 90-TTT-B33 WF O-10-47373 | Matador Production Company only | Phantom (Wolfcamp) | Loving | 4 | 1.93M | 6.23M | Dec 2014 – Aug 2026 |
| Foster, H. O-10-22457 | Occidental Permian Ltd. only | Cowden, South (Canyon 8790) | Ector | 8 | 1.78M | 1.37M | by Jan 1993 – Aug 2026 |
| Moss,paul South(canyon 8790)UNIT O-10-32791 | R3 Operating Corporation only | Cowden, South (Canyon 8790) | Ector | 36 | 1.64M | 1.3M | by Jan 1993 – Aug 2026 |
| Heard, Fannie, V. W., Mrs. O-2-2874 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 43 | 1.63M | 1.67M | by Jan 1993 – Aug 2023 |
| Cowden, Elliott F. -A- O-10-21384 | Occidental Permian Ltd. only | Cowden, South (Canyon 8790) | Ector | 53 | 1.51M | 632K | by Jan 1993 – Aug 2026 |
| Federal Gayatt O-3-22502 | Hilcorp Energy Company only | Franks, NW. (8900) | Galveston | 2 | 1.25M | 833K | Apr 1994 – Aug 2026 |
| Heard, Clement O-2-2873 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 22 | 1.22M | 1.07M | by Jan 1993 – Aug 2026 |
| Trust Unit O-3-22288 | Hilcorp Energy Company only | Franks, NW. (8900) | Galveston | 2 | 1.08M | 362K | Feb 1994 – May 2026 |
| Ratliff Red 0904 O-10-60928 | Continental Resources, Inc. only | Emma (Barnett Shale) | Ector | 4 | 1.04M | 2.3M | Dec 2023 – Aug 2026 |
| Foster 8 O-10-37284 | OXY USA WTP LP only | Cowden, South (Canyon 8790) | Ector | 3 | 999K | 911K | Feb 2004 – Aug 2026 |
| Witcher, J. E. 19 O-10-37061 | OXY USA WTP LP only | Cowden, South (Canyon 8790) | Ector | 2 | 824K | 887K | Mar 2003 – Aug 2026 |
| State Tract 904 Gas Unit O-4-13087 | TR Offshore, LLC only | G.O.M. St 904 (MT2 FB-B) | Mustang IS-SB | 1 | 795K | 1.9M | May 2002 – Dec 2025 |
| Franks /8900 Sand/ Unit O-3-6493 | Hilcorp Energy Company only | Franks (8900 Sand) | Galveston | 21 | 713K | 1.2M | by Jan 1993 – Aug 2026 |
| Alexander, Thos. P. Etal O-3-21769 | Hilcorp Energy Company only | Franks, NW. (8900) | Galveston | 2 | 698K | 340K | by Jan 1993 – Dec 2010 |
| Billy Burt 90-TTT-B33 WF O-10-48422 | Matador Production Company only | Two Georges (Bone Spring) | Loving | 2 | 682K | 2.89M | Sep 2016 – Dec 2025 |
| Sherrod 16-0903 O-9-19980 | XTO Energy Inc. only | Spraberry (Trend Area) R 40 Exc | Reagan | 1 | 628K | 2.19M | Apr 2019 – Aug 2026 |
| Reed "17" O-10-36403 | Chevron Midcontinent, L.P. only | Athey (Wolfcamp 10900) | Pecos | 1 | 591K | 2.02M | Jul 2000 – Aug 2026 |
| Hicks, B.B. O-3-14116 | Sandel Operating Company only | Martin Prairie (Wilcox 4900) | Grimes | 1 | 572K | 367K | by Jan 1993 – Apr 2016 |
| Sherrod 16-0901 O-9-20077 | XTO Energy Inc. only | Spraberry (Trend Area) R 40 Exc | Reagan | 1 | 555K | 2.4M | Apr 2019 – Aug 2026 |
| Temple Inland O-6-13657 | Jla Resources Company only | Anwac (900 Wilcox) | Anderson | 13 | 549K | 76.2K | Feb 1997 – Jun 2026 |
| State Tract 690/746 & 750 GU G-4-260767 | Orx Resources, L.L.C. only | Tule Lake (Frio Consolidated) | Nueces | 1 | 524K | 2.66M | Mar 2011 – Aug 2026 |
| Wilson, Ned -133- O-10-24900 | Apache Corporation only | Rhoda Walker (Canyon 5900) | Ward | 11 | 516K | 925K | by Jan 1993 – Mar 2018 |
| Reilly, Annie, et Vir O-2-2877 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 14 | 508K | 471K | by Jan 1993 – Aug 2026 |
| Lambert, M. F. O-2-2880 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 40 | 505K | 1.58M | by Jan 1993 – Aug 2026 |
| Foster -AA- O-10-31466 | Occidental Permian Ltd. only | Cowden, South (Canyon 8900) | Ector | 1 | 493K | 882K | by Jan 1993 – Nov 2009 |
| Pierce Ranch N 4900 Unit O-3-24336 | McGowan Working Partners, Inc. only | Pierce Ranch (4900) | Wharton | 14 | 480K | 575K | May 2003 – Aug 2026 |
| Postelle, J. F. O-10-20702 | Apache Corporation only | Rhoda Walker (Canyon 5900) | Ward | 14 | 478K | 1.9M | by Jan 1993 – Apr 2022 |
| Witcher, J. E. O-10-21463 | Occidental Permian Ltd. only | Cowden, South (Canyon 8790) | Ector | 13 | 475K | 461K | by Jan 1993 – Aug 2026 |
| A.G. Henkes Gas Unit G-2-281628 | Capital Star Oil & Gas, Inc. only | Mont (Wilcox 10,900) | Lavaca | 1 | 457K | 13M | Feb 2016 – Aug 2026 |
| Henderson, F.A. -B- O-10-30167 | Exxon Mobil Corporation only | Cowden, South (Canyon 8790) | Ector | 2 | 453K | 480K | by Jan 1993 – Jun 2002 |
| State Tract 904 Gas Unit G-4-197955 | TR Offshore, LLC only | G.O.M. St-904 (Frio 1-A) | Mustang IS-SB | 1 | 449K | 5.89M | Nov 2003 – Dec 2025 |
| UL Maroon 0904-21 A O-10-51806 | WPX Energy Permian, LLC only | Phantom (Wolfcamp) | Winkler | 1 | 448K | 561K | Nov 2018 – Aug 2026 |
| Williams, Maude, et al -A- O-2-2878 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 10 | 441K | 369K | by Jan 1993 – Jun 2024 |
| Amerigo 901BL O-9-19574 | OXY USA WTP LP only | Spraberry (Trend Area) R 40 Exc | Reagan | 1 | 437K | 1.87M | Jan 2017 – Aug 2026 |
| Trust O-3-21999 | Hilcorp Energy Company only | Franks, NW. (8900) | Galveston | 3 | 435K | 367K | Apr 1993 – Jun 2021 |
| Addis, Frank V. O-10-21062 | Occidental Permian Ltd. only | Cowden, South (Canyon 8790) | Ector | 9 | 433K | 381K | by Jan 1993 – Aug 2026 |
| Vespucci 905A O-9-19731 | OXY USA WTP LP only | Spraberry (Trend Area) R 40 Exc | Reagan | 1 | 414K | 1.93M | Sep 2017 – Aug 2026 |
| Sherman /8900 Penn./ Unit O-13-12470 | BKM Production only | Sherman (Pennsylvanian 8900) | Grayson | 36 | 410K | 1.99M | by Jan 1993 – Aug 2026 |
| Cramer-Logan Waterflood Unit O-13-30379 | Delong, Horace only | Wizard Wells (Caddo 4900) | Jack | 38 | 402K | 251K | Dec 2004 – May 2026 |
| Mesa O-11-67144 | Flat Top Operating, LLC only | Gill (Penn. Reef 6900) | Scurry | 1 | 395K | 410K | Sep 1993 – Aug 2026 |
| Kidd O-11-67615 | LPR Energy, LLC only | Ackerly, North (Canyon 9080) | Dawson | 2 | 395K | 303K | Aug 1996 – Aug 2026 |
| Kellner Jonas-Mutz-902 Ltd SA2 O-1-20498 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 1 | 395K | 656K | Jun 2022 – Aug 2026 |
| Foster 8-5 O-10-37906 | OXY USA WTP LP only | Cowden, South (Canyon 8790) | Ector | 2 | 389K | 314K | Aug 2006 – Aug 2026 |
| Monroe 34-190 O-10-49865 | Permian Resources Operating, LLC only | Phantom (Wolfcamp) | Ward | 1 | 388K | 1.36M | Feb 2018 – Aug 2026 |
| Amerigo 903A O-9-19796 | OXY USA WTP LP only | Spraberry (Trend Area) R 40 Exc | Reagan | 1 | 387K | 2.56M | Sep 2017 – Aug 2026 |