| 101 | Delphi International, Inc. | Tulsa, OK 74104 | Oil Operator | Dec 2025 |
| 102 | Delta Petroleum Corp Of Co | | Oil & Gas Operator | Oct 2010 |
| 103 | Despot, Inc. | | Oil & Gas Operator | Mar 1983 |
| 104 | Diamond Drilling Co. | | Oil Operator | Apr 1983 |
| 105 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Feb 2026 |
| 106 | Dome Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 107 | Dominion Minerals Corporation | Houston, TX 77014 | Oil & Gas Operator | Nov 2009 |
| 108 | Dorcheat Oil & Gas, LLC | | Oil & Gas Operator | Dec 2024 |
| 109 | Dossie Dews | | Oil & Gas Operator | Dec 2024 |
| 110 | Double "LL" Oil Company | | Gas Operator | Dec 1992 |
| 111 | Dual Energy, Inc. | | Oil & Gas Operator | Oct 2022 |
| 112 | Dubach Gas Company | | Oil Operator | May 2003 |
| 113 | Duer Wagner & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 1998 |
| 114 | Duke Energy Field Services Inc | | Oil Operator | Mar 2000 |
| 115 | Duke Energy Field Services LLC | | Oil Operator | Dec 2006 |
| 116 | Eason Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2012 |
| 117 | Eclipse Services, Inc. * | La Grange, TX 78945 | Oil & Gas Operator | Jul 2003 |
| 118 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 119 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 120 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Dec 2025 |
| 121 | Elysium Jennings, LLC | | Oil & Gas Operator | Dec 2024 |
| 122 | Endurance Oil & Gas, Inc. | Minden, LA 71055 | Oil & Gas Operator | Feb 2026 |
| 123 | Energy Management Corp. | | Oil & Gas Operator | Apr 1999 |
| 124 | Energy Reserves Group LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2018 |
| 125 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2025 |
| 126 | Engeo Co. | | Oil & Gas Operator | Nov 1986 |
| 127 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 128 | Ensight Energy Management, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2005 |
| 129 | Ensight IV Energy Management,LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 130 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | Jan 2023 |
| 131 | EP Operating Co, A LTD Ptrship | | Oil & Gas Operator | Oct 1992 |
| 132 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 133 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 134 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 135 | Eucutta Petroleum Inc. | | Oil & Gas Operator | Sep 2000 |
| 136 | Excel Oil & Gas, Inc. | Waxahachie, TX 75168 | Oil & Gas Operator | Feb 2026 |
| 137 | Excel Operating Corporation | | Oil & Gas Operator | Dec 2024 |
| 138 | Exchange Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1987 |
| 139 | F W Rabalais, Inc. | | Oil & Gas Operator | Dec 2014 |
| 140 | Fairfield Energy Corp. | Dallas, TX 75205 | Oil & Gas Operator | Feb 2026 |
| 141 | Faith Energy, L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 142 | Falcon Oil & Gas Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Nov 2022 |
| 143 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 144 | Fina Oil& Chem Co/Marathon Oil | | Oil & Gas Operator | Dec 1992 |
| 145 | Fite Oil & Gas, Inc. | Shreveport, LA 71163 | Oil & Gas Operator | Feb 2026 |
| 146 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 147 | Fontainebleau Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 148 | Fortune Gas & Oil, Inc. | | Oil & Gas Operator | Apr 2004 |
| 149 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Feb 2026 |
| 150 | Four Star Oil Company | | Oil & Gas Operator | May 2015 |
| 151 | Franks Petroleum, Inc. Et Al | | Oil & Gas Operator | Oct 1989 |
| 152 | Frisco Energy, L.L.C. | Tulsa, OK 74105 | Oil & Gas Operator | Nov 2025 |
| 153 | G & S Oil Company | | Oil & Gas Operator | Dec 2024 |
| 154 | G N K Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 155 | General American Oil Co Of TX | | Oil & Gas Operator | Jun 1983 |
| 156 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 157 | Getty Reserve Oil Inc | White Plains, NY 10650 | Oil & Gas Operator | Mar 2005 |
| 158 | Gillespie Well Service Co Inc | | Oil Operator | Apr 1981 |
| 159 | GMX Resources, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2014 |
| 160 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 161 | Goodrich Oil Company | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2001 |
| 162 | Granja Corporation | | Oil & Gas Operator | Dec 2003 |
| 163 | Grenadier Energy Partners II,LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2020 |
| 164 | Grizzly Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2025 |
| 165 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
| 166 | H&S Production, LLC | | Oil Operator | Nov 2024 |
| 167 | H. E. Sutton | | Oil & Gas Operator | Jan 1990 |
| 168 | Hardy Oil & Gas USA Inc. | Houston, TX 77079 | Oil & Gas Operator | Jun 1996 |
| 169 | Hassie Hunt Expl. Co. | | Oil & Gas Operator | Aug 2008 |
| 170 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 171 | Helena Production Corp | | Oil & Gas Operator | Dec 1991 |
| 172 | Herd Producing Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Feb 2026 |
| 173 | HGH Energy, Inc. | | Oil & Gas Operator | Jun 2001 |
| 174 | Hilliard Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2009 |
| 175 | Hillside Oil & Gas, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2016 |
| 176 | Hinton Well Servicing, Inc. | | Oil Operator | Feb 2008 |
| 177 | Huggs & McConathy,Et Al | | Oil & Gas Operator | Dec 1985 |
| 178 | Huggs Inc. & Bec, Et Al | | Oil & Gas Operator | Feb 1998 |
| 179 | Huggs Incorporated, Et Al | | Oil & Gas Operator | Feb 1998 |
| 180 | Hughes & Hughes | | Oil & Gas Operator | May 1984 |
| 181 | Hughes Denny Offshore Expl Inc | | Oil & Gas Operator | Nov 1988 |
| 182 | Hughes Eastern Petroleum, LTD | | Oil & Gas Operator | Jun 1986 |
| 183 | Hughes-Denny Petroleum Co.,Inc | | Oil & Gas Operator | Dec 1987 |
| 184 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 185 | Hunt Petroleum Corp. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 186 | Hurley Oil And Gas Company | | Oil & Gas Operator | Jan 1997 |
| 187 | Hurley Petroleum Corporation | Baton Rouge, LA 70821 | Oil & Gas Operator | Feb 2000 |
| 188 | Hyperion Energy LP | Dallas, TX 75206 | Oil & Gas Operator | May 2014 |
| 189 | Imc Exploration Co. | | Oil & Gas Operator | Oct 1986 |
| 190 | Indigo Minerals LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 191 | Intercoast Oil And Gas Company | Tulsa, OK 74136 | Oil & Gas Operator | Jun 1997 |
| 192 | J-Lu LTD Co | Ashdown, AR 71822 | Oil Operator | Jan 2025 |
| 193 | J-O'B Operating Company | Shreveport, LA 71135 | Oil & Gas Operator | Feb 2026 |
| 194 | J-W Operating Company | Christoval, TX 76935 | Oil & Gas Operator | Feb 2026 |
| 195 | J. M. Teutsch, Inc. | | Oil Operator | Feb 1998 |
| 196 | Jag Operating, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2019 |
| 197 | Jan-Mar Oil Company Inc. | | Oil & Gas Operator | Jan 2025 |
| 198 | Jeems Bayou Production Corp. | Oil City, LA 71061 | Oil & Gas Operator | Feb 2026 |
| 199 | JLM Sartor Inc | | Oil & Gas Operator | Jul 2016 |
| 200 | John D Caruthers Jr Et Al | | Oil & Gas Operator | Aug 1981 |