| 101 | KCS Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 102 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Sep 2025 |
| 103 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Nov 2025 |
| 104 | Kilmarnock Oil Company, Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Feb 2026 |
| 105 | Kraker & Martin Energy, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2011 |
| 106 | L & R Petroleum | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 107 | Lacy, R., Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2002 |
| 108 | Legend Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | May 2010 |
| 109 | Lime Rock Resources IV-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 110 | Linder, John Operating Co., LLC | Gladewater, TX 75647 | Oil & Gas Operator | Feb 2026 |
| 111 | Map Production Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 112 | Marr, M. H. | Dallas, TX 75201 | Gas Operator | Jan 2002 |
| 113 | Matador Production Company | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 114 | Maximus Operating, LTD. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 115 | Meade Energy Corporation | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | Dec 2025 |
| 116 | Micro Operating, Inc. | Tomball, TX 77375 | Oil & Gas Operator | Feb 2026 |
| 117 | Mud Creek Operating, LLC | Tyler, TX 75702 | Oil & Gas Operator | Feb 2026 |
| 118 | Muras Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Nov 2025 |
| 119 | Newcastle Resources, LLC | Tyler, TX 75711 | Oil & Gas Operator | Aug 2015 |
| 120 | Noble & Cantrell Expl. Co., Inc. | Winnsboro, TX 75494 | Oil & Gas Operator | Aug 2006 |
| 121 | Noe, T. C. Oil Acct. | Selman City, TX 75689 | Oil & Gas Operator | May 1996 |
| 122 | Noonday Exploration, LLC | Tyler, TX 75711 | Oil & Gas Operator | Apr 2024 |
| 123 | Now Development Co., Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2017 |
| 124 | Ocean Energy Inc | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 125 | Old Union Operating Company | Austin, TX 78716 | Oil & Gas Operator | Feb 2026 |
| 126 | Omni Oil & Gas, Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Oct 2017 |
| 127 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Feb 2026 |
| 128 | Palmer Petroleum, Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Jun 2025 |
| 129 | Palo Petroleum, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Feb 2026 |
| 130 | Paradis Investments, L.L.C. | Bellaire, TX 77401 | Oil Operator | Jun 2020 |
| 131 | Parten Operating Inc. | Houston, TX 77069 | Oil & Gas Operator | Feb 2026 |
| 132 | Pecos Petroleum Company | Houston, TX 77057 | Oil & Gas Operator | Oct 1999 |
| 133 | Pergerson Energy, L.L.C. | Richmond, VA 23225 | Oil Operator | Feb 2026 |
| 134 | Petrocorp Incorporated,A TX.Corp | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2005 |
| 135 | Phillips Energy, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2018 |
| 136 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 137 | Phillips, Jack L. | Gladewater, TX 75647 | Oil & Gas Operator | Dec 1997 |
| 138 | Phoenix Fund, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Jun 2000 |
| 139 | Pickens Company, Inc., The | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 140 | Pitco Investments, LTD. | Scottsdale, AZ 85261 | Oil & Gas Operator | Jan 2013 |
| 141 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 142 | Powerline Energy Corporation | Arlington, TX 76015 | Oil & Gas Operator | Feb 2026 |
| 143 | Prayer Oil & Gas Production, LLC | Hallsville, TX 75650 | Oil & Gas Operator | Feb 2026 |
| 144 | Prime Operating Company | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 145 | Proven Natural Resources LLC | Canton, TX 75103 | Oil & Gas Operator | Feb 2026 |
| 146 | Psi Production, Inc. | Tyler, TX 75702 | Gas Operator | Jan 1994 |
| 147 | Ramtex Energy LLC | Tulsa, OK 74114 | Oil & Gas Operator | Feb 2026 |
| 148 | Randall Exploration, LLC | Tulsa, OK 74136 | Oil Operator | Feb 2026 |
| 149 | Redman Operating Company | Houston, TX 77042 | Oil & Gas Operator | May 2008 |
| 150 | Renegade Operating Company | Aurora, CO 80016 | Oil & Gas Operator | Aug 2023 |
| 151 | Reynolds Drilling Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Feb 2026 |
| 152 | Ridley Oil Corporation | Tyler, TX 75702 | Oil & Gas Operator | Nov 1996 |
| 153 | Roosth Production Co. | Tyler, TX 75711 | Oil & Gas Operator | Feb 2026 |
| 154 | Rowan, Al | Van, TX 75790 | Oil & Gas Operator | Apr 2021 |
| 155 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 156 | S & P Energy | Benbrook, TX 76126 | Oil & Gas Operator | Oct 1994 |
| 157 | S N D Energy Company, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Feb 2026 |
| 158 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 159 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 160 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 161 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 162 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 163 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2025 |
| 164 | SDG Operating Company, Inc | Tyler, TX 75701 | Oil & Gas Operator | Feb 2026 |
| 165 | Seal Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Dec 2006 |
| 166 | Sellers Lease Service, Inc. | Flatonia, TX 78941 | Oil & Gas Operator | Feb 2026 |
| 167 | Share Petroleum Corp. | Mabank, TX 75147 | Oil Operator | Feb 2026 |
| 168 | Shelby Production Co. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2009 |
| 169 | Shidler, Mark L., Inc. | Houston, TX 77055 | Oil & Gas Operator | Feb 2026 |
| 170 | Sklar-Tex L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2001 |
| 171 | Smith Oil Co. | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 172 | Southwest Operating, Inc.-Tyler | Tyler, TX 75701 | Oil & Gas Operator | Feb 2026 |
| 173 | Spence, Ralph Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jun 2023 |
| 174 | Stonewall Production Company Inc | Tyler, TX 75702 | Oil & Gas Operator | Aug 2009 |
| 175 | Tactical Operating Company, LLC | Houston, TX 77042 | Oil & Gas Operator | Feb 2026 |
| 176 | Tam2 Squared Operating, LLC | Rockwall, TX 75032 | Oil & Gas Operator | Feb 2026 |
| 177 | Tana Exploration Company LLC | Dallas, TX 75219 | Oil & Gas Operator | Aug 2021 |
| 178 | Team Operating, L.L.C. | Pinehurst, TX 77362 | Oil & Gas Operator | Feb 2026 |
| 179 | Teco Operating Company | Athens, TX 75751 | Oil & Gas Operator | Jun 2001 |
| 180 | Texas Royalty Corp. | Austin, TX 78746 | Oil & Gas Operator | Feb 2026 |
| 181 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 182 | Three Forks Operating Co, LLC | Flatonia, TX 78941 | Oil & Gas Operator | Feb 2026 |
| 183 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Feb 2026 |
| 184 | Triple "B" Production DRLG Inc | Poynor, TX 75782 | Oil & Gas Operator | Sep 2022 |
| 185 | Triple J Investments Inc | Longview, TX 75606 | Oil & Gas Operator | Feb 2023 |
| 186 | TTK Energy LLC | Kilgore, TX 75663 | Oil Operator | Feb 2026 |
| 187 | TX Enhanced Oil Recovery Co, LLC | Sealy, TX 77474 | Oil & Gas Operator | Feb 2026 |
| 188 | Txu Fuel Company | Dallas, TX 75201 | Oil & Gas Operator | May 2004 |
| 189 | Txu Gas Company | Dallas, TX 75201 | Oil & Gas Operator | Sep 2004 |
| 190 | Tyler Oil & Gas Inc. | Tyler, TX 75702 | Oil & Gas Operator | Sep 2004 |
| 191 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 192 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Feb 2026 |
| 193 | Ursus Oil And Gas | Tyler, TX 75703 | Oil & Gas Operator | Feb 2026 |
| 194 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Feb 2026 |
| 195 | Vanguard Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 196 | Vaughn Petroleum, Inc. | Dallas, TX 75219 | Oil & Gas Operator | May 2004 |
| 197 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 198 | Vintage Petroleum, LLC | Houston, TX 77210 | Oil & Gas Operator | Dec 2019 |
| 199 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 200 | Wagner, Duer & Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 1999 |