| Cromer, Alma Preston G-6-16653 | Nadel and Gussman, L.L.C. only | Rodessa (Travis Peak) | Marion | 1 | 14.8K | 493K | by Jan 1993 – Sep 2003 |
| Hudgins, John G-13-165986 | Tatanka Operating, LLC only | Preston (Davis, Upper) | Grayson | 1 | 5.56K | 1.44M | Dec 1997 – Aug 2026 |
| Hudgins, John G-13-165990 | Tatanka Operating, LLC only | Preston (Davis, Upper) | Grayson | 1 | 5.12K | 1.2M | Dec 1997 – Aug 2026 |
| Miller G-14-215710 | Unbridled Resources, LLC only | Lucas Preston (Granite Wash) | Wheeler | 1 | 4.26K | 246K | Aug 2005 – Aug 2018 |
| Wood, Preston G-13-100179 | S & H Wells only | Jack County Regular (Gas) | Jack | 1 | 4.23K | 304K | by Jan 1993 – Sep 2018 |
| Hart, Preston G-6-242020 | Eqv Operating LLC only | Joaquin (Travis Peak) | Panola | 1 | 3.4K | 271K | Aug 2008 – Aug 2017 |
| Timberstar G-6-232658 | Preston Exploration LLC only | Carthage (Cotton Valley) | Panola | 1 | 3.34K | 262K | Nov 2007 – Nov 2010 |
| Preston Heirs Unit G-6-244864 | Atlas Operating LLC only | Raintree (Travis Peak Cons.) | Angelina | 1 | 2.1K | 1.98M | May 2008 – Jun 2026 |
| Preston Heirs Unit G-6-234932 | Atlas Operating LLC only | Raintree (Travis Peak Cons.) | Angelina | 1 | 1.34K | 2.26M | Oct 2007 – Jun 2026 |
| Preston Heirs Unit G-6-249598 | Atlas Operating LLC only | Rocky Springs (U.G.R.) | Angelina | 1 | 986 | 2.44M | Jan 2009 – Jun 2026 |
| Preston Heirs Unit G-6-240480 | Formation Resour Field Svcs, LLC only | Raintree (Travis Peak Cons.) | Angelina | 1 | 805 | 1.16M | Jun 2008 – Nov 2023 |
| Preston-Hart Unit G-6-219767 | Eqv Operating LLC only | Joaquin (Wiener) | Panola | 1 | 735 | 555K | Apr 2006 – Jan 2026 |
| Preston Heirs Unit G-6-232065 | Atlas Operating LLC only | Raintree (Travis Peak Cons.) | Angelina | 1 | 669 | 871K | Sep 2007 – Jun 2026 |
| Preston Heirs Unit G-6-229000 | Atlas Operating LLC only | Raintree (Travis Peak Cons.) | Angelina | 1 | 414 | 1.55M | May 2007 – Jun 2026 |
| Kiker G-14-129334 | Zephyr Lone Star Oper Co.,l.l.c. only | Lucas Preston (Granite Wash) | Wheeler | 1 | 317 | 62.2K | by Jan 1993 – Nov 2000 |
| Preston Heirs Unit G-6-280654 | Atlas Operating LLC only | Raintree (Travis Peak Cons.) | Angelina | 1 | 268 | 1.08M | Oct 2015 – Jun 2026 |
| Preston Heirs Unit G-6-280805 | Atlas Operating LLC only | Raintree (Travis Peak Cons.) | Angelina | 1 | 226 | 682K | Oct 2015 – Jun 2026 |
| Preston Heirs Unit G-6-90583 | Atlas Operating LLC only | Raintree (Travis Peak Cons.) | Angelina | 1 | 186 | 332K | by Jan 1993 – Jun 2026 |
| Preston Heirs Unit G-6-240477 | Formation Resour Field Svcs, LLC only | Raintree (Travis Peak Cons.) | Angelina | 1 | 155 | 445K | Apr 2008 – Nov 2023 |
| Preston Preiss et Al G-2-145927 | Core E & P Corp. only | Reichert (Miocene 1800) | Goliad | 1 | 140 | 185K | Mar 1993 – Aug 2002 |
| Preston Heirs Unit G-6-221623 | Weatherly Oil & Gas, LLC only | Raintree (Travis Peak Cons.) | Angelina | 1 | 129 | 629K | Jan 2006 – Dec 2017 |
| Preston Heirs Unit G-6-236760 | Atlas Operating LLC only | Raintree (Travis Peak Cons.) | Angelina | 1 | 128 | 95.9K | Feb 2008 – Jan 2009 |
| Preston South Deep G-6-264361 | Sabine Energy Inc. only | Carthage (Haynesville Shale) | Panola | 1 | 107 | 1.71M | Aug 2011 – Aug 2026 |
| Preston G-6-254989 | Stetson Petroleum Corp. only | Rodessa (Travis Peak) | Cass | 1 | 84 | 11.8K | Mar 2009 – Feb 2010 |
| Preston Heirs Unit G-6-283910 | Formation Resour Field Svcs, LLC only | Rocky Springs (U.G.R.) | Angelina | 1 | 45 | 2.52K | Mar 2018 – Feb 2024 |
| Preston-Scarberry (SA) G-13-266526 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 1 | 2.58M | Jun 2012 – Aug 2026 |
| Preston, Elizabeth G-13-267025 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 1 | 2.67M | Jun 2012 – Aug 2026 |
| Preston-Scarberry (SA) G-13-266807 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 1 | 3.44M | Jun 2012 – Aug 2026 |
| Preston, Elizabeth G-13-267019 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 1 | 2.57M | Jun 2012 – Aug 2026 |
| Hart, Preston G-6-249171 | Eqv Operating LLC only | Joaquin (Travis Peak) | Panola | 1 | 0 | 0 | — |
| Stewart, Preston G-2-133421 | Wagner Oil Company only | Norbee (Frio 2900) | Bee | 1 | 0 | 0 | — |
| Wilkerson G-6-155831 | Preston Exploration LLC only | Beckville (Cotton Valley) | Panola | 1 | 0 | 116K | Jan 1995 – Jun 1997 |
| Robinson, M.E. G-6-231254 | Preston Exploration LLC only | Wildcat | Panola | 1 | 0 | 0 | — |
| Txu Tatum Gas Unit No. 1 G-6-233659 | Preston Exploration LLC only | Wildcat | Panola | 1 | 0 | 0 | — |
| Orange Gas Unit G-6-237786 | Preston Exploration LLC only | Wildcat | Panola | 1 | 0 | 0 | — |
| Young, Minnie Bell G-6-238017 | Preston Exploration LLC only | Wildcat | Rusk | 1 | 0 | 0 | — |
| Wilcots, S.W. Gas Unit G-6-251576 | Preston Exploration LLC only | Wildcat | Panola | 1 | 0 | 0 | — |
| Preston, Elizabeth G-13-224573 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 0 | 1.38M | Jul 2006 – Aug 2026 |
| Preston, Elizabeth G-13-267021 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 0 | 3.05M | Jun 2012 – Aug 2026 |
| Elizabeth Preston G-13-267022 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 0 | 2.97M | Jun 2012 – Aug 2026 |
| Preston, Elizabeth G-13-267026 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 0 | 3.62M | Jun 2012 – Aug 2026 |
| Preston G-14-25082 | Burk Royalty Co., Ltd. only | Panhandle, West | Moore | 1 | 0 | 957K | by Jan 1993 – Aug 2026 |
| Preston Heirs Unit G-6-284225 | Atlas Operating LLC only | Rocky Springs (U.G.R.) | Angelina | 1 | 0 | 0 | — |
| Pratt, Preston G-8-76758 | E.C. Hindman Oil and Gas only | Delong (Conglomerate) | Stephens | 1 | 0 | 375K | by Jan 1993 – Apr 2025 |
| Preiss, Preston et Al G-2-123026 | Core E & P Corp. only | Reichert (Miocene 1800) | Goliad | 1 | 0 | 1.89K | by Jan 1993 – Jun 1998 |
| Preston G-13-226112 | TEP Barnett USA, LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 0 | 399K | Sep 2006 – Feb 2016 |