| 101 | Fletcher Operating Co. | | Oil & Gas Operator | May 1989 |
| 102 | Fortenberry Operating Co., Inc | | Oil & Gas Operator | Nov 2003 |
| 103 | Fortenbery Drilling Co., Inc. | | Oil & Gas Operator | Oct 1979 |
| 104 | Four Rivers Exploration, Inc. | | Oil & Gas Operator | Sep 2002 |
| 105 | Francis Oil & Gas, LLC | | Oil & Gas Operator | Jan 2011 |
| 106 | Francis-Guido Oil Expl. Inc. | | Oil Operator | Feb 1986 |
| 107 | Francis-Guido Operating Co Inc | | Oil & Gas Operator | Dec 1987 |
| 108 | Frazier Temple Oil Co. | | Oil & Gas Operator | Dec 1996 |
| 109 | Fred Whitaker | | Oil Operator | Feb 1985 |
| 110 | G.G. Cornwell | | Oil Operator | Apr 1987 |
| 111 | Gage Energy, LLC | | Oil Operator | Sep 2019 |
| 112 | Gator Oil Co | Banner Elk, NC 28604 | Oil Operator | Dec 2020 |
| 113 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 114 | Gravtro, Inc. | | Oil Operator | Apr 1986 |
| 115 | Griffin & Griffin Oil Co. Inc. | | Oil & Gas Operator | Jun 2001 |
| 116 | Guaranty Energy Corporation | | Oil & Gas Operator | Aug 1990 |
| 117 | Guido & Arnold | | Oil & Gas Operator | Feb 1982 |
| 118 | Guido Energy Co & Guernsey Pet | | Oil Operator | Aug 1991 |
| 119 | Gyb-Britlind Oil, LLC | | Oil & Gas Operator | Jun 2016 |
| 120 | H. & N. Operating Co., Inc. | | Oil & Gas Operator | Oct 1997 |
| 121 | Hallwell Gas & Oil Co. | | Oil & Gas Operator | Sep 1985 |
| 122 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2024 |
| 123 | Harry L. Neeb | | Oil Operator | May 1985 |
| 124 | Harvest Petroleum Inc. | Frisco, TX 75033 | Oil & Gas Operator | Mar 2025 |
| 125 | Hispanic Oil & Gas Energy LLC | | Oil Operator | Jan 2025 |
| 126 | Hogan Exploration, Inc. | | Oil & Gas Operator | Mar 2000 |
| 127 | Hondo Operating, Inc. | | Oil & Gas Operator | Aug 1997 |
| 128 | Houston Oil & Minerals Corp. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 129 | Hughes & New-D. Braswell | | Oil & Gas Operator | Jun 1983 |
| 130 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Mar 2025 |
| 131 | Hurley Oil And Gas Company | | Oil & Gas Operator | Jan 1997 |
| 132 | Hurley Petroleum Corporation | Baton Rouge, LA 70821 | Oil & Gas Operator | Feb 2000 |
| 133 | Int'L Petr & Expl Opr Corp | | Oil & Gas Operator | Jan 2012 |
| 134 | Interstate Producing Servs,Inc | | Oil & Gas Operator | May 1987 |
| 135 | Irvin Operations, Inc. | | Oil Operator | Aug 1996 |
| 136 | J & M Oil | | Oil Operator | Apr 1994 |
| 137 | J.M. Oil L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 138 | Jack E. Stack, Jr. | | Oil & Gas Operator | Aug 1996 |
| 139 | Jack Taunton Energy | | Oil Operator | May 2002 |
| 140 | Jackson Petroleum Co., Inc. | | Oil & Gas Operator | Feb 2010 |
| 141 | Jamco Oil Corp. | | Oil & Gas Operator | Nov 2005 |
| 142 | Jerry P Ogden | | Oil & Gas Operator | Dec 2008 |
| 143 | Jimco Oil Company, Inc. | Electra, TX 76360 | Oil & Gas Operator | Jun 2019 |
| 144 | Jimmy Roberson Energy Corporation | Texarkana, TX 75503 | Oil & Gas Operator | Sep 2012 |
| 145 | JMR Oil, Inc. | | Oil & Gas Operator | Sep 2006 |
| 146 | Joe W. Burrage | | Oil Operator | Jun 1986 |
| 147 | John B. Echols & Associates | | Oil Operator | Jun 1983 |
| 148 | John W. McGowan | | Oil & Gas Operator | Jun 1991 |
| 149 | Jones Oil Company | Ardmore, OK 73402-1389 | Oil & Gas Operator | Aug 2022 |
| 150 | JSB, LLC | | Oil & Gas Operator | Dec 2024 |
| 151 | Justiss Oil Company, Inc. | Jena, LA 71342 | Oil & Gas Operator | Dec 2024 |
| 152 | Justiss-Mears Oil Co. | | Oil & Gas Operator | Feb 1981 |
| 153 | JWR Oil And Gas | | Oil Operator | Nov 2024 |
| 154 | Kecco, Inc. | | Oil Operator | May 2002 |
| 155 | Kelly H. Baxter | Austin, TX 78767 | Oil & Gas Operator | Nov 2006 |
| 156 | KFG Petroleum Corporation | | Oil & Gas Operator | Jan 2025 |
| 157 | Kirkwood Engineering, LTD | | Oil Operator | Dec 1991 |
| 158 | L & K Oil | | Oil Operator | Oct 1997 |
| 159 | Lace Operating | Fort Worth, TX 76114 | Oil & Gas Operator | Jun 1997 |
| 160 | Lago VIsta Operating, L.L.C. | | Oil Operator | Dec 2024 |
| 161 | Lawson Engineering, Inc. | | Oil & Gas Operator | Dec 1984 |
| 162 | Liberty Resources, Inc. | | Oil & Gas Operator | Dec 2024 |
| 163 | Little & Whyte Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Mar 2008 |
| 164 | Long Oil & Natural Gas Corp. | | Oil & Gas Operator | Feb 1996 |
| 165 | Louisiana Fuel Oil Corporation | | Oil Operator | Aug 1997 |
| 166 | LPB Oil Company | | Oil & Gas Operator | Apr 1991 |
| 167 | Mark F Preddy & Associates,Inc | | Oil & Gas Operator | Dec 1987 |
| 168 | Marlin Expl.,Inc&Exchg O&G Co | | Oil & Gas Operator | Jun 1987 |
| 169 | Marlin Exploration, Inc. | | Oil & Gas Operator | Oct 2006 |
| 170 | Martineau Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2025 |
| 171 | Mass Resources, Inc. | | Oil Operator | Jan 2025 |
| 172 | McGoldrick & Watson DRLG., Co. | | Oil & Gas Operator | Jul 1987 |
| 173 | McGoldrick Oil Company | Shreveport, LA 71129 | Oil & Gas Operator | Jul 2020 |
| 174 | McGowan Working Partners | Jackson, MS 39296 | Oil & Gas Operator | Dec 2000 |
| 175 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Mar 2025 |
| 176 | MCZ Oil Co, Inc. | | Oil Operator | Feb 1994 |
| 177 | Meason Operating Company | Natchez, MS 39121 | Oil & Gas Operator | Dec 2011 |
| 178 | Meng Oper. & Expl. Co. | | Oil & Gas Operator | Dec 1989 |
| 179 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Mar 2025 |
| 180 | Merrico Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2008 |
| 181 | Mid-National Resources Inc. | | Oil Operator | Feb 1999 |
| 182 | Middle Bay Production Co. Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2014 |
| 183 | Miocene Oil & Gas, LTD. | Englewood, CO 80110 | Oil & Gas Operator | Mar 2025 |
| 184 | Miss Lou Oil Producers, Inc. | | Oil & Gas Operator | Dec 1998 |
| 185 | Miss-Lou Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 186 | MJB Production Company, Inc. | Brownfield, TX 79316 | Oil & Gas Operator | Mar 2025 |
| 187 | Mobil Oil E & P Southeast Inc | | Oil & Gas Operator | Sep 2013 |
| 188 | Monsanto Oil Company | | Oil & Gas Operator | Apr 1986 |
| 189 | Munoco Co. | El Dorado, AR 71730 | Oil & Gas Operator | Jul 2021 |
| 190 | Naylor-Pritchard | | Oil Operator | Jul 1987 |
| 191 | Netco Energy 1 LLC | | Oil Operator | Jan 2025 |
| 192 | Nevanen Energy Inc | | Oil & Gas Operator | Dec 2022 |
| 193 | New & Brasher Operating | | Oil Operator | Oct 1984 |
| 194 | Newco, Inc. | Oklahoma City, OK 73177 | Oil Operator | Aug 1999 |
| 195 | O'Brien Operating Company | | Oil & Gas Operator | Dec 2004 |
| 196 | O'Malley Production Co. Inc. | | Oil & Gas Operator | Mar 1988 |
| 197 | Oakland Corporation | | Oil & Gas Operator | Dec 1981 |
| 198 | Oilwell Acquisition Co. | | Oil & Gas Operator | Jun 1999 |
| 199 | Okkatahula, Inc. | | Oil Operator | Nov 1978 |
| 200 | Owl Creek Production Co., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2006 |