| 101 | Edinger Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2007 |
| 102 | El Paso Natural Gas Company | El Paso, TX 79978 | Oil & Gas Operator | Apr 2013 |
| 103 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 104 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | May 2025 |
| 105 | Elite Tank Trucks, Inc | | Oil & Gas Operator | Apr 2025 |
| 106 | Enable Oklahoma Intrastate Transmission LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2022 |
| 107 | Encana Energy Resources Inc | Denver, CO 80202-2828 | Oil & Gas Operator | Feb 2024 |
| 108 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 109 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 110 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 111 | Eott Energy Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 1995 |
| 112 | Eott Energy Operating LP | Houston, TX 77210-4666 | Oil & Gas Operator | Oct 2009 |
| 113 | EP Operating LP | Dallas, TX 75201 | Oil & Gas Operator | Mar 2015 |
| 114 | Esco Exploration, Inc | Dallas, TX 75201 | Oil & Gas Operator | Mar 2015 |
| 115 | Esis Inc | | Oil & Gas Operator | Feb 2017 |
| 116 | Evergreen Operating Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 117 | Evolution Energy LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2025 |
| 118 | Evolution Operating Co., Inc. | Houston, TX 77079 | Oil & Gas Operator | Jul 2025 |
| 119 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Jul 2025 |
| 120 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | May 2025 |
| 121 | Fairway Resources Operating III LLC | Houston, TX 77002-2728 | Oil & Gas Operator | Apr 2025 |
| 122 | Fairway Resources Operating, LLC | Southlake, TX 76092 | Oil & Gas Operator | Aug 2022 |
| 123 | Flow Production Company | Midland, TX 79708 | Oil & Gas Operator | Mar 2005 |
| 124 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 125 | Gas Development Corp. | Broken Arrow, OK 74012 | Oil & Gas Operator | Mar 2015 |
| 126 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 127 | General Minerals Corp | Oklahoma City, OK 73105 | Oil & Gas Operator | Dec 2015 |
| 128 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 129 | Geodyne Resources Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 130 | Geyer Brothers Equipment Company | Noble, OK 73068-8540 | Oil & Gas Operator | Mar 2011 |
| 131 | GHK Company LLC (The) | Oklahoma City, OK 73118-1120 | Oil & Gas Operator | Apr 2018 |
| 132 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | May 2025 |
| 133 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jun 2025 |
| 134 | Hadson Petro USA Inc | | Oil & Gas Operator | Nov 2016 |
| 135 | Halcon Holdings Inc | Ada, OK 74820 | Oil & Gas Operator | Nov 2018 |
| 136 | Halcyon Natural Gas LLC | Oklahoma City, OK 73116-9111 | Oil & Gas Operator | May 2025 |
| 137 | Hall Energy Company LLC | Oklahoma City, OK 73120-5020 | Oil & Gas Operator | Jul 2022 |
| 138 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 2025 |
| 139 | Hamilton Brothers Oil Co. | Houston, TX 77057 | Oil & Gas Operator | Mar 2015 |
| 140 | Hanna Oil And Gas Company | Fort Smith, AR 72901 | Oil & Gas Operator | Apr 2025 |
| 141 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Mar 2025 |
| 142 | Highland Oil & Gas LLC | Houston, TX 77079-7220 | Oil & Gas Operator | Feb 2015 |
| 143 | Highmark Energy Operating, LLC | Dallas, TX 75222 | Oil & Gas Operator | Jul 2025 |
| 144 | Hilltop Disposal LLC | Elk City, OK 73644-2400 | Oil Operator | Jun 2021 |
| 145 | HK Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 146 | Horn Oil Company | Bristow, OK 74010 | Oil & Gas Operator | Apr 2025 |
| 147 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 2025 |
| 148 | Hunt, H L | Dallas, TX 75202-2785 | Oil & Gas Operator | Dec 2024 |
| 149 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 150 | Jma Energy Company, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2025 |
| 151 | Jones, L. E. Production Co. | Duncan, OK 73534 | Oil & Gas Operator | Jul 2014 |
| 152 | Jubilee Exploration LLC | Ardmore, OK 73401-7526 | Oil & Gas Operator | Dec 2024 |
| 153 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | May 2025 |
| 154 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Jul 2025 |
| 155 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Apr 2025 |
| 156 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 157 | KCS Resources LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2017 |
| 158 | Kelley Oil & Gas | McAlester, OK 74570 | Oil & Gas Operator | May 2013 |
| 159 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 160 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 161 | Key Energy Corporation | Enid, OK 73702-5349 | Oil & Gas Operator | Oct 2017 |
| 162 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2025 |
| 163 | Kingfisher Resources Inc | Clinton, OK 73601 | Oil & Gas Operator | May 2025 |
| 164 | KNG Producers | Dumas, TX 79029 | Oil & Gas Operator | Oct 2009 |
| 165 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 166 | L E Jones Operating Inc | Duncan, OK 73534 | Oil & Gas Operator | May 2025 |
| 167 | Larkspur Operating LLC | Oklahoma City, OK 73034 | Oil & Gas Operator | Apr 2025 |
| 168 | Larson Exploration Company | Tulsa, OK 74136-4939 | Oil & Gas Operator | Jul 2016 |
| 169 | Latigo Oil And Gas Inc | Woodward, OK 73801 | Oil & Gas Operator | May 2025 |
| 170 | Latigo Petroleum LLC | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 171 | Leede Oil & Gas Inc. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Aug 2003 |
| 172 | Lincoln Ventures LLC | Inola, OK 74036-5035 | Oil & Gas Operator | Apr 2025 |
| 173 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Aug 2024 |
| 174 | Locin Oil Corporation | Katy, TX 77494 | Oil & Gas Operator | Jul 2025 |
| 175 | Loki Oil LLC | Cushing, OK 74023 | Oil & Gas Operator | Nov 2024 |
| 176 | Louisiana Land & Exploration Co. | Houston, TX 77210 | Oil & Gas Operator | Sep 2013 |
| 177 | Mackellar Inc | Oklahoma City, OK 73116-7101 | Oil & Gas Operator | May 2025 |
| 178 | Magnum Energy Inc | Norman, OK 73072-2403 | Oil & Gas Operator | May 2025 |
| 179 | Majors John Dba Majors Production Co | Weleetka, OK 74880 | Oil & Gas Operator | Apr 2025 |
| 180 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | May 2025 |
| 181 | Marlin Oil Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Apr 2025 |
| 182 | Marshall Oil Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2017 |
| 183 | McNic Oil & Gas Midcontinent | Oklahoma City, OK 73154-0526 | Oil & Gas Operator | May 2024 |
| 184 | McQueen Ed & Company Inc | Lindsey, OK 73052 | Oil & Gas Operator | Apr 2014 |
| 185 | Meade Energy Corporation | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | May 2025 |
| 186 | Meridian Oil Production Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 2024 |
| 187 | Mesa Operating LP | Irving, TX 75039-3746 | Oil & Gas Operator | Oct 2010 |
| 188 | Mge Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 189 | Miracle Production Inc | Yukon, OK 73085-0680 | Oil & Gas Operator | Jun 2007 |
| 190 | Mito Resources LLC | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 191 | MT Energy LLC | Waskom, TX 75692 | Oil & Gas Operator | Jul 2025 |
| 192 | Muirfield Resources Company | Tulsa, OK 74101-3166 | Oil & Gas Operator | Jun 2024 |
| 193 | Mustang Fuel Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2025 |
| 194 | National Energy Group, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 195 | Natural Gas Pipeline Co Of Am LLC | Downers Grove, IL 60515-3708 | Oil & Gas Operator | Mar 2015 |
| 196 | Neg Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Nov 2024 |
| 197 | Newpark Drilling Fluids LLC | Clinton, OK 73601 | Oil Operator | Dec 2013 |
| 198 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 199 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Jul 2025 |
| 200 | Northwest Oil Company | Dallas, TX 75204 | Oil & Gas Operator | Jun 2014 |