| 1 | Aethon Energy Operating LLC | Dallas, TX 75251 | Oil & Gas Operator | Mar 2025 |
| 2 | Amity Oil Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 1977 |
| 3 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 4 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Dec 2024 |
| 5 | Anglo Production Company | | Oil & Gas Operator | Nov 1983 |
| 6 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Mar 2025 |
| 7 | Artzberger-Johnson | | Oil & Gas Operator | Mar 1978 |
| 8 | Barton Oil & Gas Co., Inc. | | Oil & Gas Operator | Sep 1993 |
| 9 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 10 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 11 | BKV Ventures, LLC | | Oil & Gas Operator | Nov 2020 |
| 12 | Bradco Oil & Gas Company | | Oil & Gas Operator | Dec 1980 |
| 13 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 14 | Britlind Oil LLC | | Oil & Gas Operator | Dec 2020 |
| 15 | Burlington Res Oil & Gas LP | Houston, TX 77079 | Oil & Gas Operator | Nov 2024 |
| 16 | Cajun Minerals, Inc. | | Oil & Gas Operator | Mar 1997 |
| 17 | Cajun Operating, Inc. | | Oil & Gas Operator | Jun 2011 |
| 18 | Cerro Oil Co., Inc. | | Oil Operator | Dec 1987 |
| 19 | Charles G. Dannelly | | Oil & Gas Operator | Mar 1998 |
| 20 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2025 |
| 21 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2024 |
| 22 | Clayton W. Williams, Jr., Inc. | | Oil & Gas Operator | May 1993 |
| 23 | Clayton Williams Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Apr 2017 |
| 24 | Clovelly Oil Co. LLC | | Oil & Gas Operator | Nov 2024 |
| 25 | Clovelly Oil Co., Inc. | | Oil & Gas Operator | Nov 2008 |
| 26 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 27 | Crain & Dore Production Co Inc | | Oil & Gas Operator | Oct 1990 |
| 28 | Crosstex Lig, LLC | | Oil Operator | Mar 2014 |
| 29 | Dac Oil Corporation | | Oil & Gas Operator | Dec 1985 |
| 30 | Dalnor Corporation | | Oil & Gas Operator | Nov 2010 |
| 31 | Damson Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Mar 2005 |
| 32 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Mar 2025 |
| 33 | Drew Cornell, Inc. | | Oil & Gas Operator | Jun 1992 |
| 34 | Duer Wagner & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 1998 |
| 35 | Dynamic Exploration PTRS, LLC | | Oil & Gas Operator | Nov 2024 |
| 36 | Dynamic Exploration, Inc. | | Oil & Gas Operator | Oct 2003 |
| 37 | E & E Production Company, Inc. | | Oil & Gas Operator | Dec 2004 |
| 38 | Eldorado Gas Inc. | | Oil & Gas Operator | May 1986 |
| 39 | Empire Land Corporation | New Orleans, LA 70130 | Oil & Gas Operator | Nov 2014 |
| 40 | Enercorp Resources, Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 1993 |
| 41 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 42 | Enlink Lig, LLC | | Oil Operator | Jan 2025 |
| 43 | Evangeline Pumpers, Inc. | | Oil & Gas Operator | Jul 2005 |
| 44 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 45 | Five-Jab, Inc. | Tomball, TX 77377 | Oil & Gas Operator | Mar 2025 |
| 46 | Florida Exploration Co | Aurora, CO 80014 | Oil & Gas Operator | Sep 1989 |
| 47 | Flynn Energy Corporation | Tulsa, OK 74137 | Oil & Gas Operator | Mar 1993 |
| 48 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Mar 2025 |
| 49 | Franks Petroleum, Inc. Et Al | | Oil & Gas Operator | Oct 1989 |
| 50 | General American Oil Co Of TX | | Oil & Gas Operator | Jun 1983 |
| 51 | Getty Reserve Oil, Inc. | White Plains, NY 10650 | Oil & Gas Operator | Mar 2005 |
| 52 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 53 | Great Southern Oil &Gas Co Inc | | Oil & Gas Operator | Dec 2004 |
| 54 | Gyb-Britlind Oil, LLC | | Oil & Gas Operator | Jun 2016 |
| 55 | Hardey Co., The | Shreveport, LA 71107 | Oil & Gas Operator | Mar 2025 |
| 56 | HCW Exploration, Inc. | | Oil & Gas Operator | Jun 1986 |
| 57 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Mar 2025 |
| 58 | Howell Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Oct 2015 |
| 59 | Iberia Operating Corporation | | Oil & Gas Operator | Jan 2003 |
| 60 | Independent Exploration Company | | Oil & Gas Operator | Dec 2000 |
| 61 | Indian Exploration, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Mar 2025 |
| 62 | Indigo Haynesville LLC | | Gas Operator | Feb 2018 |
| 63 | Indigo II Louisiana Operating LLC | | Oil & Gas Operator | Feb 2015 |
| 64 | Indigo Minerals LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 65 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 66 | Itr Petroleum Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 67 | J-O'B Operating Company | Shreveport, LA 71135 | Oil & Gas Operator | Mar 2025 |
| 68 | J. P. Van Way | | Oil & Gas Operator | Dec 2024 |
| 69 | J. Rodney Fontenot | | Oil & Gas Operator | Jul 2011 |
| 70 | Jada Inc. | | Oil & Gas Operator | Jul 2013 |
| 71 | Julil Energy, LLC | Richmond, TX 77406 | Oil & Gas Operator | Dec 2024 |
| 72 | Kaiser Oil (U.S.) LTD. | | Oil & Gas Operator | Apr 1983 |
| 73 | Kash Oil And Gas, Inc | | Oil & Gas Operator | Oct 2020 |
| 74 | KCS Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 75 | Kelly H. Baxter | Austin, TX 78767 | Oil & Gas Operator | Nov 2006 |
| 76 | Key Operating Co., Inc. | Duncan, OK 73534-1284 | Oil & Gas Operator | Jan 2025 |
| 77 | L E Carpenter Oil & Gas, Inc. | | Oil & Gas Operator | Sep 1985 |
| 78 | La Chalk Gathering System | | Oil Operator | Jan 2006 |
| 79 | La Intrastate Gas Co LLC | | Oil Operator | Apr 2004 |
| 80 | La. Land & Expl. Co. | | Oil & Gas Operator | Dec 2010 |
| 81 | Leeward Operators LLC | | Oil & Gas Operator | Jul 2011 |
| 82 | Lenape Resources Corp | | Oil & Gas Operator | Dec 2000 |
| 83 | Linder Oil Company | | Oil & Gas Operator | Apr 1985 |
| 84 | Louisiana Intrastate Gas Corp. | | Oil Operator | Feb 1994 |
| 85 | M L Mayfield Petroleum Corp. | | Oil & Gas Operator | Aug 1991 |
| 86 | M. L. Mayfield | | Oil & Gas Operator | Oct 1990 |
| 87 | M. L. Mayfield Co. | | Oil & Gas Operator | Aug 1991 |
| 88 | Magnolia Production Company LLC | | Oil & Gas Operator | Nov 2024 |
| 89 | Manursing Island Prod. Corp. | | Oil & Gas Operator | Sep 2002 |
| 90 | McDaniel Petroleum Company, Inc. | | Oil Operator | Jun 2020 |
| 91 | Merritt Operating, Inc. | Mineola, TX 75773 | Oil & Gas Operator | Mar 2025 |
| 92 | Midstates Petroleum Company LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2018 |
| 93 | Midstates Petroleum Corp. | | Oil & Gas Operator | Dec 2008 |
| 94 | MW Petroleum Corporation | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 95 | N Central Casing Pullers, Inc. | | Oil & Gas Operator | May 1994 |
| 96 | National Exploration Company | | Oil & Gas Operator | Mar 1982 |
| 97 | Neosho Operating La, LLC | | Oil Operator | Oct 2016 |
| 98 | Neumin Production Company | Point Comfort, TX 77978 | Oil & Gas Operator | Mar 2025 |
| 99 | Newmont Oil Co. & Colorado | | Oil & Gas Operator | Mar 1978 |
| 100 | Nicklos Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Nov 1986 |