| 101 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 102 | Equipment, Inc. | | Oil & Gas Operator | Mar 1983 |
| 103 | Equitable Petroleum Corp. | | Oil & Gas Operator | Jan 1999 |
| 104 | Etoco, L.P. | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 105 | Exoro Energy, L.L.C. | | Oil & Gas Operator | Jun 2021 |
| 106 | Five-Jab, Inc. | Tomball, TX 77377 | Oil & Gas Operator | Oct 2025 |
| 107 | Flash Gas & Oil Northeast, Inc | | Oil & Gas Operator | May 2007 |
| 108 | Flash Gas & Oil Southwest, Inc. | Mandeville, LA 70470 | Oil & Gas Operator | Oct 2019 |
| 109 | Flex Energy, L.L.C. | | Oil & Gas Operator | Feb 2010 |
| 110 | Florida Exploration Co | Aurora, CO 80014 | Oil & Gas Operator | Sep 1989 |
| 111 | Florida Gas Transmission Co. | | Oil Operator | Dec 2007 |
| 112 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Oct 2025 |
| 113 | Franks Petroleum, Inc. Et Al | | Oil & Gas Operator | Oct 1989 |
| 114 | Freeport Oil Company | New Orleans, LA 70112 | Oil & Gas Operator | Oct 1979 |
| 115 | Gaither Petroleum Corporation | Katy, TX 77493 | Oil & Gas Operator | Oct 2025 |
| 116 | Gas Producing Enterprises Inc. | | Oil & Gas Operator | Oct 1985 |
| 117 | General Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jun 1993 |
| 118 | Genesis Producing Company, L.P. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Dec 2017 |
| 119 | George D. Hartfield Oil & Gas, Inc. | | Oil & Gas Operator | Dec 2024 |
| 120 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 121 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 122 | Goodrich Oil Company | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2001 |
| 123 | Goodrich Petroleum Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2022 |
| 124 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 125 | Graham Expl LTD-DRLG PRNRSHP | | Oil & Gas Operator | Aug 1984 |
| 126 | Graham Exploration, LTD. | | Oil & Gas Operator | Oct 1993 |
| 127 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 128 | Great Southern Oil &Gas Co Inc | | Oil & Gas Operator | Dec 2004 |
| 129 | Gruy Management Service Co. | | Oil & Gas Operator | Apr 1982 |
| 130 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
| 131 | Gulf Production Company, Inc. | | Oil & Gas Operator | Dec 2024 |
| 132 | Gulf South Pipeline Company, LLC | | Oil & Gas Operator | Jan 2025 |
| 133 | Gulf South Pipeline Company, LP | Houston, TX 77001 | Oil & Gas Operator | Dec 2020 |
| 134 | Gyb-Britlind Oil, LLC | | Oil & Gas Operator | Jun 2016 |
| 135 | Halbouty-Reserve | | Oil & Gas Operator | Sep 1987 |
| 136 | Halbouty-Reserve-Pel-Tex | | Oil & Gas Operator | May 1985 |
| 137 | Harbert Energy Corp/Gulf Coast | | Oil & Gas Operator | Dec 1991 |
| 138 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 139 | Henderson Oil & Gas | | Oil Operator | Sep 1990 |
| 140 | Henry Production Company, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Oct 2019 |
| 141 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Oct 2025 |
| 142 | Hilliard Oil & Gas Inc | New Orleans, LA 70112 | Oil & Gas Operator | May 2001 |
| 143 | Hilliard Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2009 |
| 144 | Hilty Interests, Inc. | Kerrville, TX 78028 | Oil & Gas Operator | Jun 1989 |
| 145 | Houston Production Corporation | | Oil & Gas Operator | Jan 2004 |
| 146 | Howell Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Oct 2015 |
| 147 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 148 | Hunter Oil & Gas, LLC | | Oil & Gas Operator | Oct 2001 |
| 149 | Huntlyn Operating, LLC | | Oil & Gas Operator | Sep 2022 |
| 150 | Iberia Operating Corporation | | Oil & Gas Operator | Jan 2003 |
| 151 | Imperial-American Energy,Inc. | | Oil & Gas Operator | Jul 1978 |
| 152 | Indian Exploration, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Oct 2025 |
| 153 | Indigo II Louisiana Operating LLC | | Oil & Gas Operator | Feb 2015 |
| 154 | Indigo Minerals LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 155 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 156 | Int'L Petr & Expl Opr Corp | | Oil & Gas Operator | Jan 2012 |
| 157 | Irwin H. Parnes | | Oil Operator | Jun 1982 |
| 158 | J. Hus Hawkins | | Oil & Gas Operator | Feb 1989 |
| 159 | J. P. M. Investments, LTD. | | Oil & Gas Operator | Sep 1988 |
| 160 | J. P. Van Way | | Oil & Gas Operator | Dec 2024 |
| 161 | Jada Inc. | | Oil & Gas Operator | Jul 2013 |
| 162 | James A. Whitson, Jr. | | Oil & Gas Operator | Apr 2016 |
| 163 | Janex Oil Co., Inc. | Dallas, TX 75219 | Oil & Gas Operator | Jun 2005 |
| 164 | Jennings Holdings, LLC | | Oil & Gas Operator | Dec 2024 |
| 165 | JLS Investments | | Oil & Gas Operator | Mar 2002 |
| 166 | John W. McGowan | | Oil & Gas Operator | Jun 1991 |
| 167 | Johnson Oil & Gas Corporation | | Oil & Gas Operator | Feb 1994 |
| 168 | Kash Oil And Gas, Inc | | Oil & Gas Operator | Oct 2020 |
| 169 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | May 2025 |
| 170 | Kerr-McGee Oil & Gas Onshr LLC | | Oil & Gas Operator | Dec 2005 |
| 171 | Kerr-McGee Rocky Mountain Corp | Denver, CO 80202 | Oil & Gas Operator | Jan 2007 |
| 172 | Key Operating Co., Inc. | Duncan, OK 73534-1284 | Oil & Gas Operator | Jan 2025 |
| 173 | Koch Gateway Pipeline Company | | Oil & Gas Operator | Feb 2001 |
| 174 | L E Carpenter Oil & Gas, Inc. | | Oil & Gas Operator | Sep 1985 |
| 175 | La Coastal Pet.Services Co Inc | | Oil & Gas Operator | Dec 1982 |
| 176 | La Intrastate Gas Co LLC | | Oil Operator | Apr 2004 |
| 177 | La. Land & Expl. Co. | | Oil & Gas Operator | Dec 2010 |
| 178 | Lafayette Oilfield Contractors, Inc. | | Oil Operator | Dec 2024 |
| 179 | Lamar Hunt | | Oil & Gas Operator | Oct 2003 |
| 180 | Layline Petroleum I, LLC | Houston, TX 77024 | Oil & Gas Operator | May 2013 |
| 181 | Leeward Operators LLC | | Oil & Gas Operator | Jul 2011 |
| 182 | Leggett Petroleum, L.L.C. | | Oil & Gas Operator | Dec 2020 |
| 183 | LGS Exploration, Inc. | | Oil & Gas Operator | Jan 1991 |
| 184 | Liberty Oil And Gas Corp. | Olney, IL 62450-2489 | Oil & Gas Operator | Dec 2021 |
| 185 | Liberty Resources, Inc. | | Oil & Gas Operator | Dec 2024 |
| 186 | Louisiana Intrastate Gas Corp. | | Oil Operator | Feb 1994 |
| 187 | Lynal, Inc. | | Oil & Gas Operator | Oct 1988 |
| 188 | Lyons Petroleum, Inc. | | Oil & Gas Operator | Oct 1988 |
| 189 | M & R Exploration Company | Houston, TX 77074 | Oil & Gas Operator | Aug 2003 |
| 190 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | Jul 2025 |
| 191 | Mannon L. Walters, Inc. | | Oil & Gas Operator | Jun 2024 |
| 192 | Manti Operating Company | Covington, LA 70435 | Oil & Gas Operator | Oct 2025 |
| 193 | Manursing Island Prod. Corp. | | Oil & Gas Operator | Sep 2002 |
| 194 | Marion Corporation | | Oil & Gas Operator | Jan 2001 |
| 195 | Mark L Shidler Inc | Houston, TX 77055 | Oil & Gas Operator | Jul 2025 |
| 196 | Marlin Energy Offshore, L.L.C. | | Oil & Gas Operator | Jun 2006 |
| 197 | Martin-Marks Operating Co. LLC | | Oil & Gas Operator | Dec 2010 |
| 198 | Martineau Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2025 |
| 199 | McGowan Working Partners | Jackson, MS 39296 | Oil & Gas Operator | Dec 2000 |
| 200 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Oct 2025 |