| 101 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 102 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 103 | Diversified Production LLC | Minden, LA 71055 | Oil & Gas Operator | Apr 2024 |
| 104 | Dominion Exp Midcontinent Inc | Oklahoma City, OK 73134-2616 | Oil & Gas Operator | Feb 2024 |
| 105 | Dominion Exploration & Production Inc | Houston, TX 77060 | Oil & Gas Operator | Apr 2015 |
| 106 | Dominion Ok TX E & P Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2018 |
| 107 | Dorchester Exploration, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 2001 |
| 108 | Dorchester Minerals Operating LP | Dallas, TX 75219 | Oil & Gas Operator | Jun 2022 |
| 109 | Dorchester Resources LP | Oklahoma City, OK 73154 | Oil & Gas Operator | Aug 2021 |
| 110 | Douglass Dietz & Daley Inc | Oklahoma City, OK 73154-0125 | Oil & Gas Operator | Aug 2023 |
| 111 | Draco Production Company | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2012 |
| 112 | DRG Energy Inc | Norman, OK 73026-3171 | Oil & Gas Operator | Nov 2023 |
| 113 | Duncan Oil Properties, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 114 | Dunigan Operating Company, Inc. | Austin, TX 78755 | Oil & Gas Operator | Apr 2024 |
| 115 | Dyco Petroleum Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 116 | E. T. S. Enterprises, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Jul 1996 |
| 117 | Eagle Gas Marketing Co | Oklahoma City, OK 73114-2202 | Oil & Gas Operator | Nov 2022 |
| 118 | Earlsboro Energies Corporation | Oklahoma City, OK 73116-3605 | Oil & Gas Operator | Jan 2024 |
| 119 | Edinger Engineering, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2024 |
| 120 | El Paso Natural Gas Company | El Paso, TX 79978 | Oil & Gas Operator | Apr 2013 |
| 121 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 122 | Encana Energy Resources Inc | Denver, CO 80202-2828 | Oil & Gas Operator | Jan 2021 |
| 123 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 124 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 125 | Eott Energy Operating LP | Houston, TX 77210-4666 | Oil & Gas Operator | Oct 2009 |
| 126 | Evolution Energy LLC | | Oil & Gas Operator | Jan 2024 |
| 127 | Exoko Operating Company Inc | Tulsa, OK 74170-0246 | Oil & Gas Operator | Jan 2006 |
| 128 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 129 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Mar 2024 |
| 130 | Fairway Resources Operating III LLC | | Oil & Gas Operator | Jan 2024 |
| 131 | Farmers Energy Corporation | Tulsa, OK 74103-3525 | Oil & Gas Operator | Nov 2021 |
| 132 | Femco SWD Inc | Enid, OK 73702-3907 | Oil Operator | Mar 2014 |
| 133 | Flow Production Company | Midland, TX 79708 | Oil & Gas Operator | Mar 2005 |
| 134 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 135 | Foreman Enterprises, Inc. | Edmond, OK 73003 | Oil & Gas Operator | Feb 2024 |
| 136 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 137 | Frontier Energy Serv LLC | Enid, OK 73702-1187 | Oil & Gas Operator | Jun 2016 |
| 138 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 139 | G M Oil Properties Inc | Eufaula, OK 74432-0841 | Oil & Gas Operator | Feb 2012 |
| 140 | Gala Resources, LTD. | Graham, TX 76450 | Oil & Gas Operator | Jan 2024 |
| 141 | Gene Cook Inc | Woodward, OK 73802-0689 | Oil & Gas Operator | Feb 2024 |
| 142 | Genesis Crude Oil LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2000 |
| 143 | Geo Engineering Inc | Houston, TX 77027 | Oil & Gas Operator | Jun 2009 |
| 144 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 145 | Geodyne Resources Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 146 | Geyer Brothers Equipment Company | Noble, OK 73068-8540 | Oil & Gas Operator | Mar 2011 |
| 147 | GHK Company LLC (The) | Oklahoma City, OK 73118-1120 | Oil & Gas Operator | Apr 2018 |
| 148 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2024 |
| 149 | Green Valley Disposal Serv LLC | Waynoka, OK 73860-0194 | Oil Operator | Feb 2024 |
| 150 | Greg Hall Oil & Gas LLC | Edmond, OK 73003 | Oil & Gas Operator | Jan 2024 |
| 151 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2024 |
| 152 | H2ox Operating LLC | | Oil Operator | Feb 2024 |
| 153 | Hadson Petro USA Inc | | Oil & Gas Operator | Nov 2016 |
| 154 | Hadson Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 155 | Hagler William N | Farmington, NM 87499-0035 | Oil Operator | Apr 2014 |
| 156 | Halcon Holdings Inc | Ada, OK 74820 | Oil & Gas Operator | Nov 2018 |
| 157 | Halcyon Natural Gas LLC | Oklahoma City, OK 73116-9111 | Oil & Gas Operator | Feb 2024 |
| 158 | Hall Edward L | Ada, OK 74820-3321 | Oil & Gas Operator | Jan 2024 |
| 159 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2023 |
| 160 | Ham Oil Company, LLC | | Oil Operator | Sep 2022 |
| 161 | Harlow Corporation, The | Amarillo, TX 79101 | Oil & Gas Operator | Apr 2014 |
| 162 | Harris Minerals Corp (The) | Oklahoma City, OK 73162-1045 | Oil & Gas Operator | Jan 2024 |
| 163 | Heartlands Development Co Inc | Bristow, OK 74010-3826 | Oil & Gas Operator | May 2017 |
| 164 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2024 |
| 165 | High Sierra Crude Oil& Marketing LLC | Ardmore, OK 73401 | Oil Operator | Nov 2013 |
| 166 | Hillin-Simon Oil Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2013 |
| 167 | HK Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 168 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |
| 169 | Huitt Joe A | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 170 | Hulsey Larry O & Co | Graham, TX 76046 | Oil & Gas Operator | Jun 2012 |
| 171 | Hunt Energy Corporation | | Oil & Gas Operator | Feb 2002 |
| 172 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 173 | Hunt, H L | Dallas, TX 75202-2785 | Oil & Gas Operator | Feb 2020 |
| 174 | Hy-Carb Energy Inc | | Oil & Gas Operator | Feb 2009 |
| 175 | Inca Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2009 |
| 176 | Indrex Inc | Tulsa, OK 74133 | Oil & Gas Operator | Dec 2000 |
| 177 | Jay Management Company LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 178 | Jefferson Co LLC (The) | Corinth, TX 76205 | Oil & Gas Operator | Aug 2004 |
| 179 | Jma Energy Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2024 |
| 180 | Jma Resources, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Jan 2024 |
| 181 | Johnston Oil & Gas Inc | Bethany, OK 73008-5424 | Oil & Gas Operator | Sep 2009 |
| 182 | Jones Energy LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jan 2024 |
| 183 | K & W Oil Company | MT Carmel, IL 62830 | Oil & Gas Operator | May 2013 |
| 184 | K M Gas Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2014 |
| 185 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Apr 2024 |
| 186 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2024 |
| 187 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 188 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Sep 2023 |
| 189 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2024 |
| 190 | Kingfisher Resources Inc | Clinton, OK 73601-1237 | Oil & Gas Operator | Feb 2024 |
| 191 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 192 | Kybenco Disposals LLC | | Oil Operator | Sep 2022 |
| 193 | Lake Country Disposal II LLC | | Oil Operator | Jan 2024 |
| 194 | Lake Country Disposal LLC | | Oil Operator | Jan 2024 |
| 195 | Lar-Mie Petroleum Inc | Tulsa, OK 74136 | Oil & Gas Operator | Aug 1998 |
| 196 | Lariat Petroleum Inc | Tulsa, OK 74119 | Oil & Gas Operator | Sep 2023 |
| 197 | Latigo Petroleum, LLC | Pampa, TX 79066 | Oil & Gas Operator | Apr 2024 |
| 198 | Lavrco Energie Inc | Duncan, OK 73533 | Oil & Gas Operator | Jan 2024 |
| 199 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 200 | Leede Oil & Gas Inc. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Aug 2003 |