| 1 | Aethon Energy Operating LLC | Dallas, TX 75251 | Oil & Gas Operator | Dec 2025 |
| 2 | Alva J. Dixon | | Oil & Gas Operator | Aug 1991 |
| 3 | Alvin & Roger Wilson | | Oil Operator | Dec 2007 |
| 4 | Amerada Hess Corp-Placid | | Gas Operator | Sep 1990 |
| 5 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 6 | American Explorer, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Jan 1999 |
| 7 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 8 | Ark-La-Tex Energy, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2025 |
| 9 | Arkla Exploration Co. | Shreveport, LA 71151 | Oil & Gas Operator | Jan 1993 |
| 10 | Attaway Energy Group, Inc. | | Oil & Gas Operator | Aug 1995 |
| 11 | Barnwell Petroleum Corp. | | Oil & Gas Operator | Sep 1978 |
| 12 | Basic Energy & Affil Res. Inc. | | Oil & Gas Operator | May 2000 |
| 13 | Bayou Exploration, Inc. | | Oil & Gas Operator | Aug 1989 |
| 14 | BCF Operating, LLC | | Oil & Gas Operator | Nov 2024 |
| 15 | Beacon Petroleum Corporation | | Oil & Gas Operator | Jan 1992 |
| 16 | Beusa Energy, Inc. | Spring, TX 77380 | Oil & Gas Operator | Apr 2011 |
| 17 | Beusa Energy, LLC | | Oil & Gas Operator | Nov 2017 |
| 18 | BHP Billiton Petro (KCS Resources), LLC | | Oil & Gas Operator | Jul 2019 |
| 19 | BHP Billiton Petro (Txla Operating) Co. | | Gas Operator | Jul 2019 |
| 20 | Blakely Land & Exploration Co. | | Oil & Gas Operator | Apr 1991 |
| 21 | BMR Oil & Gas, Inc. | | Oil & Gas Operator | Dec 2024 |
| 22 | Bomar Oil & Gas, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Dec 2020 |
| 23 | BPX (KCS Resources), LLC | | Oil & Gas Operator | Feb 2022 |
| 24 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 25 | Braddock Exploration, LTD. | | Oil & Gas Operator | Mar 1991 |
| 26 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2025 |
| 27 | Brian C. Register | | Oil & Gas Operator | Jun 2011 |
| 28 | Brix Operating LLC | | Gas Operator | Apr 2021 |
| 29 | Bsi Operating, LLC | | Oil & Gas Operator | Dec 2019 |
| 30 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Dec 2025 |
| 31 | C & M Operating Company | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 32 | Carl P. Roppolo, Jr. | | Oil & Gas Operator | Mar 1991 |
| 33 | Caruthers Producing Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2019 |
| 34 | Caspen Operating Company | Somerset, TX 78069 | Oil & Gas Operator | Mar 2008 |
| 35 | Cathey Oil, Inc. | | Oil & Gas Operator | Aug 2009 |
| 36 | Centennial Exploration, Inc. | | Oil & Gas Operator | Dec 1985 |
| 37 | Centerpoint Energy FLD Ser Inc | | Oil Operator | Feb 2011 |
| 38 | Chanse Energy Corporation | Shreveport, LA 71165-1572 | Oil & Gas Operator | Sep 2021 |
| 39 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 40 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2025 |
| 41 | Comco Of Louisiana, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2000 |
| 42 | Compass Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 43 | Comstock Oil & Gas--La, LLC | | Oil & Gas Operator | Dec 2024 |
| 44 | Concor Petroleum, Inc. | | Oil & Gas Operator | Feb 1983 |
| 45 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 46 | Covey Park Gas LLC | | Oil & Gas Operator | Aug 2019 |
| 47 | Crosstex Lig, LLC | | Oil Operator | Mar 2014 |
| 48 | Crystal Oil And Land Company | | Oil & Gas Operator | May 1992 |
| 49 | D. G. Oil Co. | Dennis, TX 76439 | Oil & Gas Operator | Dec 2025 |
| 50 | D. I. Dupree | | Oil & Gas Operator | Sep 2015 |
| 51 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 52 | Danos Oil & Gas LLC | | Oil & Gas Operator | Oct 2024 |
| 53 | Decker & Associates | | Oil & Gas Operator | Mar 1991 |
| 54 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Dec 2025 |
| 55 | Dow Mineral & Royalty Co, Inc | | Oil & Gas Operator | Jun 1994 |
| 56 | Dupree And Dupree | | Oil Operator | Dec 1998 |
| 57 | Dzurik Interests, Inc. | | Oil & Gas Operator | Dec 2024 |
| 58 | E Texas Production MGMT Co Inc | | Oil & Gas Operator | Oct 1996 |
| 59 | Eddy Enterprises, Inc. | | Oil & Gas Operator | Sep 2023 |
| 60 | Egh Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 61 | Eli Rebich | | Oil & Gas Operator | Dec 1986 |
| 62 | Empresa Energy, LP | Houston, TX 77024 | Oil & Gas Operator | Jul 2009 |
| 63 | Enable Midstream Partners, LP | Oklahoma City, OK 73124 | Oil Operator | Sep 2023 |
| 64 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 65 | Enerco Exploration & MGMT. Co. | | Oil & Gas Operator | Aug 1981 |
| 66 | Energy Exploration Co | | Oil & Gas Operator | Feb 1991 |
| 67 | Energy Finders, Inc. | | Oil & Gas Operator | Dec 1981 |
| 68 | Enlink Lig, LLC | | Oil Operator | Jan 2025 |
| 69 | Ensight III Energy MGMT, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2008 |
| 70 | Ensight IV Energy Management,LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 71 | Equinox Oil Company Inc | Plainville, KS 67663 | Oil & Gas Operator | Dec 2019 |
| 72 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 73 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 74 | Exco Operating Company, LP | Dallas, TX 75251 | Oil & Gas Operator | Dec 2025 |
| 75 | Exco Production Company, LP | Dallas, TX 75251 | Oil & Gas Operator | Dec 2009 |
| 76 | Exco/Hgi JV Assets, LLC | Dallas, TX 75251 | Oil & Gas Operator | Jun 2014 |
| 77 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 78 | Fite Oil & Gas, Inc. | Shreveport, LA 71163 | Oil & Gas Operator | Dec 2025 |
| 79 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 80 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | Dec 2025 |
| 81 | Fran Oil, Inc. | | Oil & Gas Operator | Dec 2024 |
| 82 | Genesis Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 1995 |
| 83 | George M. Bagley | | Oil Operator | Dec 2024 |
| 84 | George R Schurman | | Oil & Gas Operator | Oct 2015 |
| 85 | Gep Haynesville, LLC | | Gas Operator | Dec 2021 |
| 86 | Goldrus Producing Company | Houston, TX 77064 | Oil & Gas Operator | Aug 2009 |
| 87 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 88 | Goodrich Petroleum Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2022 |
| 89 | Grady And Roppolo | | Oil & Gas Operator | Aug 1980 |
| 90 | Grigsby Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2025 |
| 91 | Guaranty Energy Corp. | | Oil & Gas Operator | Aug 1990 |
| 92 | Guernsey Petroleum Corporation | Atlanta, GA 30318 | Oil & Gas Operator | Nov 1997 |
| 93 | Gulf South Pipeline Company, LP | Houston, TX 77001 | Oil & Gas Operator | Dec 2020 |
| 94 | H & B Well Service, Inc. | | Oil & Gas Operator | Aug 1993 |
| 95 | H M Jarred & Walsh-Watts | | Oil & Gas Operator | Sep 1992 |
| 96 | H. E. Sutton | | Oil & Gas Operator | Jan 1990 |
| 97 | Halliburton Operating Company | Plano, TX 75093 | Oil & Gas Operator | Dec 2025 |
| 98 | Hallmark Oil And Gas Co., Inc. | | Oil & Gas Operator | Dec 2024 |
| 99 | High-Hope Oil And Gas, Inc | | Oil & Gas Operator | Mar 2017 |
| 100 | Hilliard Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2009 |