| 101 | Esquire Oil And Gas LLC | | Oil & Gas Operator | Jan 2011 |
| 102 | Est. Of H. L. Hunt | | Oil & Gas Operator | Jun 1983 |
| 103 | Etoco, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 104 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Apr 2025 |
| 105 | Exodus Energy, Inc. | | Oil & Gas Operator | Jul 2018 |
| 106 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 107 | Firstrike Energy Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Jan 2025 |
| 108 | Five-Jab, Inc. | Tomball, TX 77377 | Oil & Gas Operator | Jul 2025 |
| 109 | Fne Operating LLC | | Oil Operator | Dec 2024 |
| 110 | Fontainebleau Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 111 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 112 | Fort Apache Energy, Inc. | Boerne, TX 78015 | Oil & Gas Operator | Jul 2025 |
| 113 | Fortune Gas & Oil, Inc. | | Oil & Gas Operator | Apr 2004 |
| 114 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Jul 2025 |
| 115 | Franks Petroleum, Inc. Et Al | | Oil & Gas Operator | Oct 1989 |
| 116 | Fremont Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2004 |
| 117 | G & D Energy, Inc. | | Oil & Gas Operator | May 1986 |
| 118 | Gas Marketing, Inc. | Stafford, KS 67578 | Oil Operator | Mar 2007 |
| 119 | Gas Producing Enterprises Inc. | | Oil & Gas Operator | Oct 1985 |
| 120 | General Atlantic Energy Corp. | | Oil & Gas Operator | Nov 1988 |
| 121 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 122 | Geodyne Resources Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 123 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 124 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 125 | Gordy Oil Company | Houston, TX 77007 | Oil & Gas Operator | Jul 2025 |
| 126 | Great Scott, Inc. | | Oil & Gas Operator | Oct 1993 |
| 127 | Great Southern Oil &Gas Co Inc | | Oil & Gas Operator | Dec 2004 |
| 128 | Greystone Operating, Inc. | | Oil & Gas Operator | Nov 2009 |
| 129 | Gulf South Operators, Inc. | New Orleans, LA 70130 | Oil & Gas Operator | Oct 2015 |
| 130 | Gulf South Pipeline Company, LLC | | Oil & Gas Operator | Jan 2025 |
| 131 | Gulf South Pipeline Company, LP | Houston, TX 77046 | Oil & Gas Operator | Dec 2020 |
| 132 | Gulfport Energy Corporation | Oklahoma City, OK 73134-5003 | Oil & Gas Operator | Feb 2025 |
| 133 | Gulfstream Petroleum Corp. | | Oil & Gas Operator | Feb 2002 |
| 134 | Halcon Louisiana Operating, LP | | Oil & Gas Operator | Sep 2017 |
| 135 | Hamilton Brothers Oil Co. | Houston, TX 77057 | Oil & Gas Operator | Mar 2015 |
| 136 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Jul 2025 |
| 137 | Harvard Investments, Inc. | | Oil & Gas Operator | Oct 2002 |
| 138 | Highlands Operating Co., Inc. | | Oil & Gas Operator | May 1990 |
| 139 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Jul 2025 |
| 140 | Hilliard Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2009 |
| 141 | Horizon Expl. & Dev. Co., Inc. | | Oil & Gas Operator | Jun 1995 |
| 142 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 143 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 2025 |
| 144 | Iberia Operating Corporation | | Oil & Gas Operator | Jan 2003 |
| 145 | Ike Lovelady, Inc. | | Oil & Gas Operator | Jun 1985 |
| 146 | Indian Exploration, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Jul 2025 |
| 147 | Indigo II Louisiana Operating LLC | | Oil & Gas Operator | Feb 2015 |
| 148 | Indigo Minerals LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 149 | Inflow Petroleum Resources LP | Dallas, TX 75240 | Oil & Gas Operator | Sep 2008 |
| 150 | Intercoast Oil And Gas Company | Tulsa, OK 74136 | Oil & Gas Operator | Jun 1997 |
| 151 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 152 | Itr Petroleum Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 153 | J-Lu LTD Co | Ashdown, AR 71822 | Oil Operator | Jan 2025 |
| 154 | J-W Operating Company | Christoval, TX 76935 | Oil & Gas Operator | Jul 2025 |
| 155 | J. P. Owen & Co. Inc. | | Oil & Gas Operator | Feb 1991 |
| 156 | J. P. Van Way | | Oil & Gas Operator | Dec 2024 |
| 157 | Jack Corman | | Oil & Gas Operator | Jul 1981 |
| 158 | Jack L. Phillips | | Oil & Gas Operator | Aug 1994 |
| 159 | Jackson Petroleum Co., Inc. | | Oil & Gas Operator | Feb 2010 |
| 160 | Jade Petroleum Inc. | | Oil & Gas Operator | May 1998 |
| 161 | Jem Petroleum Corporation | | Oil & Gas Operator | Jun 1983 |
| 162 | Jen Oil & Gas | | Oil & Gas Operator | Feb 2006 |
| 163 | Jennings Holdings, LLC | | Oil & Gas Operator | Dec 2024 |
| 164 | Jimmy Roberson Energy Corp. | Texarkana, TX 75503 | Oil & Gas Operator | Sep 2012 |
| 165 | Joe W. Burrage | | Oil Operator | Jun 1986 |
| 166 | John R Thompson Operating, Inc | | Oil & Gas Operator | Apr 1985 |
| 167 | Johnson Oil & Gas Corporation | | Oil & Gas Operator | Feb 1994 |
| 168 | Jordan Oil Company, Inc. | Lake Charles, LA 70602 | Oil & Gas Operator | Dec 2019 |
| 169 | JWR Exploration Inc. | | Oil & Gas Operator | Jul 1989 |
| 170 | Kaler Energy Corp. | Boerne, TX 78006 | Oil & Gas Operator | Jul 2025 |
| 171 | Kash Oil And Gas, Inc | | Oil & Gas Operator | Oct 2020 |
| 172 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 173 | KCS Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 174 | Kelly H. Baxter | Austin, TX 78767 | Oil & Gas Operator | Nov 2006 |
| 175 | Kerr-McGee Oil & Gas Onshr LLC | | Oil & Gas Operator | Dec 2005 |
| 176 | Kerr-McGee Rocky Mountain Corp | Denver, CO 80202 | Oil & Gas Operator | Jan 2007 |
| 177 | Key Operating Co., Inc. | Duncan, OK 73534-1284 | Oil & Gas Operator | Jan 2025 |
| 178 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2025 |
| 179 | Kimco Energy Corporation | | Oil & Gas Operator | Apr 1989 |
| 180 | Kiowa-T.N.T., Inc. | | Oil Operator | Sep 1981 |
| 181 | KP Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1997 |
| 182 | La Intrastate Gas Co LLC | | Oil Operator | Apr 2004 |
| 183 | Lafayette Oilfield Contractors, Inc. | | Oil Operator | Dec 2024 |
| 184 | Lago Petroleum Co. | | Oil & Gas Operator | Jan 1992 |
| 185 | Lakeside Resources | | Oil & Gas Operator | Mar 1989 |
| 186 | Lamson Petroleum Corporation | | Oil & Gas Operator | Mar 1993 |
| 187 | Lamson/Crocker Petroleum Corp. | | Oil & Gas Operator | May 1988 |
| 188 | Las Services, Inc. | | Oil & Gas Operator | Oct 1997 |
| 189 | Lea Exploration, Inc. | | Oil & Gas Operator | Nov 1989 |
| 190 | Levinson Partners Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 1995 |
| 191 | Liberty Oil And Gas Corp. | Olney, IL 62450-2489 | Oil & Gas Operator | Dec 2021 |
| 192 | Liberty Resources, Inc. | | Oil & Gas Operator | Dec 2024 |
| 193 | Lighthouse Operating, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Jun 2021 |
| 194 | Louisiana Energy Consultants, Inc. | | Oil & Gas Operator | Dec 2024 |
| 195 | Louisiana Intrastate Gas Corp. | | Oil Operator | Feb 1994 |
| 196 | Lucky Lad Energy, LLC | Magnolia, TX 77353 | Oil & Gas Operator | Jul 2025 |
| 197 | Lynal, Inc. | | Oil & Gas Operator | Oct 1988 |
| 198 | Lyons Petroleum, Inc. | | Oil & Gas Operator | Oct 1988 |
| 199 | M & M Investments | | Oil & Gas Operator | May 1990 |
| 200 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | May 2025 |