| Hutchings Stock Association O-10-25374 | Sundown Energy LP only | Wagon Wheel (Penn) | Ward | 183 | 12.5M | 47.9M | by Jan 1993 – Jul 2026 |
| Andrews Unit O-10-34968 | Hilcorp Energy Company only | Andrews (Wolfcamp-Penn.) | Andrews | 97 | 9.44M | 8.4M | Jul 1996 – Aug 2026 |
| I. A. B. Unit O-9-3910 | Citation Oil & Gas Corp. only | I. A. B. (Menielle Penn.) | Coke | 89 | 3.61M | 21.2M | by Jan 1993 – Aug 2026 |
| University Block 9 /Penn/ Unit O-10-21413 | XTO Energy Inc. only | University Block 9 (Penn.) | Andrews | 70 | 3.57M | 7.46M | by Jan 1993 – Aug 2026 |
| O'Brien, G. W. Etal O-10-26670 | Sundown Energy LP only | Wagon Wheel (Penn) | Ward | 40 | 3.12M | 7.32M | by Jan 1993 – Aug 2026 |
| Southwest Andrews Unit O-10-35543 | Morningstar Operating LLC only | Andrews (Wolfcamp-Penn.) | Andrews | 37 | 2.49M | 3.88M | Dec 1997 – Aug 2026 |
| Bivins Ranch O-14-6832 | P.o.&g. Operating, LLC only | Ert (Pennsylvanian) | Potter | 23 | 2.28M | 470K | by Jan 1993 – Aug 2026 |
| Pegasus Pennsylvanian Unit O-9-1178 | COG Operating LLC only | Pegasus (Pennsylvanian) | Upton | 99 | 1.9M | 18.7M | by Jan 1993 – Apr 2010 |
| Pennington Unit O-1-16425 | Murphy Expl. & Prod. Co. - USA only | Eagleville (Eagle Ford-1) | Atascosa | 7 | 1.58M | 1.12M | Dec 2012 – Aug 2026 |
| N. E., I. A. B. Unit O-9-4864 | GTG Operating, LLC only | I. A. B., NE. (Penn. 5150) | Coke | 74 | 1.31M | 2.79M | by Jan 1993 – Jun 2026 |
| Exxon Penn Fee O-6-1675 | Exxon Mobil Corporation only | Talco | Franklin | 79 | 1.24M | 23 | by Jan 1993 – Jun 2011 |
| Waddell TR 3 O-10-21511 | Blackbeard Operating, LLC only | Block 31, NW. (Penn Upper) | Crane | 38 | 1.01M | 879K | by Jan 1993 – Aug 2026 |
| Hildebrand O-10-24798 | Burk Royalty Co., Ltd. only | Conger (Penn) | Sterling | 125 | 1.01M | 35.2M | by Jan 1993 – Aug 2026 |
| Hazelwood O-13-30027 | Tatanka Operating, LLC only | Gordonville, S. (Penn.) | Grayson | 2 | 983K | 1.71M | Oct 2001 – Aug 2026 |
| Edmondson A O-10-34061 | Burk Royalty Co., Ltd. only | Conger (Penn) | Glasscock | 37 | 878K | 13.3M | Dec 1993 – Aug 2026 |
| Adams, Lucy O-10-18552 | Sundown Energy LP only | Estes Block 34 (Penn.) | Ward | 13 | 870K | 4.01M | by Jan 1993 – Aug 2026 |
| Link, L. C. O-10-37324 | Hilcorp Energy Company only | Andrews (Wolfcamp-Penn.) | Andrews | 3 | 759K | 703K | Jun 2004 – Aug 2026 |
| Thorpe 1-74 Lov O-10-42337 | Pdeh LLC only | Moore-Hooper (Wlfcmp\penn Cons) | Loving | 4 | 754K | 1.77M | Dec 2011 – Aug 2026 |
| Sadler /Penn./ Field Unit O-13-11127 | Silver Creek Oil & Gas, LLC only | Sadler (Penn.) | Grayson | 64 | 741K | 426K | by Jan 1993 – Aug 2026 |
| Penn-Cat O-3-24282 | Fort Apache Energy, Inc. only | Rich Ranch, N. (Y6D-Oil) | Liberty | 2 | 708K | 944K | Sep 2002 – Jul 2026 |
| Sixteen Penny Nail 310 O-10-49967 | Oxyrock Operating, LLC only | Spraberry (Trend Area) | Martin | 3 | 699K | 1.92M | Nov 2017 – Aug 2026 |
| Sealy Smith O-10-48180 | Sundown Energy LP only | Wickett (Penn.) | Ward | 12 | 684K | 5.84M | Feb 2015 – Aug 2026 |
| Classen O-11-4490 | Scout Energy Management LLC only | Mungerville (Pennsylvanian) | Dawson | 4 | 684K | 280K | by Jan 1993 – Aug 2026 |
| Pennybacker W Unit O-10-58691 | Ovintiv USA Inc. only | Spraberry (Trend Area) | Martin | 3 | 683K | 1.03M | Mar 2023 – Aug 2026 |
| Sixteen Penny Nail 310C O-10-49986 | Oxyrock Operating, LLC only | Spraberry (Trend Area) | Martin | 3 | 645K | 2.16M | Nov 2017 – Aug 2026 |
| Hutchings Stock Assn. O-10-22977 | Sundown Energy LP only | Wickett, North (Penn.) | Ward | 11 | 630K | 2.71M | by Jan 1993 – Jul 2026 |
| Pennybacker E Unit O-10-58462 | Ovintiv USA Inc. only | Spraberry (Trend Area) | Martin | 3 | 602K | 697K | Feb 2023 – Aug 2026 |
| North Sadler Penn Unit O-13-28749 | Silver Creek Oil & Gas, LLC only | Sadler (Penn.) | Grayson | 17 | 597K | 484K | Apr 1994 – Aug 2026 |
| Elliott O-9-22162 | Hibernia Resources IV, LLC only | June Ann (Pennsylvanian) | Irion | 3 | 597K | 2.05M | May 2023 – Aug 2026 |
| Patrick Chevron "123" O-11-67300 | Rim Operating, Inc. only | Sean Andrew (Penn.) | Dawson | 1 | 595K | 217K | Oct 1994 – Jul 2026 |
| Turner Ranch West O-9-19874 | Hibernia Resources IV, LLC only | June Ann (Pennsylvanian) | Tom Green | 29 | 581K | 7.2M | Feb 2018 – Aug 2026 |
| Hogg, George D. O-10-43692 | Hilcorp Energy Company only | F. A. Hogg (Penn Detrital) | Winkler | 4 | 580K | 2.8M | Feb 2013 – Aug 2026 |
| Block 31 Unit O-10-51135 | Hilcorp Energy Company only | Block 31 (Penn. 7620) | Crane | 28 | 569K | 2.82M | Jan 2018 – Aug 2026 |
| Winans, Lou O-10-4549 | Crescent Energy Operating, LLC only | Oceanic (Pennsylvanian) | Howard | 5 | 540K | 708K | by Jan 1993 – Mar 2020 |
| Burkhart O-11-66865 | Petroplex Energy Inc. only | Ackerly, E. (Penn.) | Howard | 1 | 529K | 406K | by Jan 1993 – Aug 2026 |
| University -JC- O-10-32724 | Morningstar Operating LLC only | University Block 9 (Penn.) | Andrews | 4 | 518K | 1.39M | by Jan 1993 – Aug 2026 |
| Mitchell, Alex 1 G-9-157237 | White Rock Oil & Gas, LLC only | Deer Canyon (Penn) | Terrell | 1 | 516K | 25.7M | Oct 1995 – Aug 2026 |
| Parker, J. E. "T" O-10-34706 | Morningstar Operating LLC only | Andrews (Wolfcamp-Penn.) | Andrews | 2 | 489K | 794K | Oct 1995 – Aug 2026 |
| Crutchfield O-9-20540 | Hibernia Resources IV, LLC only | June Ann (Pennsylvanian) | Irion | 5 | 487K | 3.2M | Aug 2019 – Aug 2026 |
| Sixteen Penny Nail 310B O-10-49959 | Oxyrock Operating, LLC only | Spraberry (Trend Area) | Martin | 3 | 482K | 1.95M | Dec 2017 – Aug 2026 |
| Pennywise B O-9-22843 | Diamondback E&P LLC only | Spraberry (Trend Area) | Upton | 3 | 451K | 1.22M | Dec 2024 – Aug 2026 |
| Whitetail O-10-34847 | Petex only | Vincent, West (Penn.) | Howard | 1 | 437K | 480K | Feb 1996 – Aug 2026 |
| Springer 10 23 O-10-42392 | Hilcorp Energy Company only | F. A. Hogg (Penn Detrital) | Winkler | 2 | 428K | 669K | Sep 2011 – Aug 2026 |
| Brangus University O-10-34556 | Morningstar Operating LLC only | University Block 9 (Penn.) | Andrews | 3 | 428K | 273K | Jul 1995 – Aug 2026 |
| Classen, W. J. O-11-4487 | Scout Energy Management LLC only | Mungerville (Pennsylvanian) | Dawson | 2 | 423K | 6.44K | by Jan 1993 – Aug 2026 |
| Winans, J. F. O-10-4544 | Crescent Energy Operating, LLC only | Oceanic (Pennsylvanian) | Howard | 9 | 421K | 544K | by Jan 1993 – Sep 2025 |
| Clarke, Frank Jr. NCT-1 O-10-34675 | Hilcorp Energy Company only | Andrews (Wolfcamp-Penn.) | Andrews | 4 | 421K | 149K | Oct 1995 – 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 |
| Sliver O-10-34538 | Pioneer Natural Res. USA, Inc. only | China Beach (Penn Reef) | Howard | 1 | 410K | 456K | Jun 1995 – Aug 2016 |
| Softail "10-17" O-10-39687 | Hilcorp Energy Company only | F. A. Hogg (Penn Detrital) | Winkler | 2 | 400K | 1.28M | Nov 2009 – Jul 2026 |