| 101 | DLKB Operating LLC | Eufaula, OK 74432 | Gas Operator | Feb 2025 |
| 102 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Mar 2025 |
| 103 | Dominion Ok TX E & P Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2018 |
| 104 | Draco Production Company | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2012 |
| 105 | Drake Exploration Inc | Tulsa, OK 74105-4250 | Oil & Gas Operator | Mar 2025 |
| 106 | Duffer William R | Edmond, OK 73034-6761 | Oil & Gas Operator | Aug 2018 |
| 107 | Duncan Oil Properties, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2025 |
| 108 | Durango Resources Corp. | Houston, TX 77043 | Oil & Gas Operator | May 2025 |
| 109 | Dyco Petroleum Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 110 | Dyne Exploration Company | Plano, TX 75093-6512 | Oil & Gas Operator | Apr 2020 |
| 111 | E Lyle Johnson Inc | Oklahoma City, OK 73142 | Oil & Gas Operator | Feb 2025 |
| 112 | Earlsboro Energies Corporation | Oklahoma City, OK 73116-3605 | Oil & Gas Operator | Feb 2025 |
| 113 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 114 | Elite Tank Trucks, Inc | | Oil & Gas Operator | Mar 2025 |
| 115 | Enable Gas Transmission LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 116 | Energas Corporation | Oklahoma City, OK 73105 | Oil & Gas Operator | Feb 2025 |
| 117 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2025 |
| 118 | Enersource Royalty Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2013 |
| 119 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 120 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 121 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | May 2022 |
| 122 | EP Operating LP | Dallas, TX 75201 | Oil & Gas Operator | Mar 2015 |
| 123 | Esco Exploration, Inc | Dallas, TX 75201 | Oil & Gas Operator | Mar 2015 |
| 124 | Esis Inc | | Oil & Gas Operator | Feb 2017 |
| 125 | Evans Production Co. | Pampa, TX 79066 | Oil & Gas Operator | Sep 2020 |
| 126 | Evolution Operating Co., Inc. | Houston, TX 77079 | Oil & Gas Operator | May 2025 |
| 127 | Exploration Associates II LLC | Oklahoma City, OK 73102-8815 | Oil & Gas Operator | Jan 2013 |
| 128 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | May 2025 |
| 129 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Feb 2025 |
| 130 | Fair Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Dec 2000 |
| 131 | Faulconer Vernon E Inc | Tyler, TX 75711 | Oil & Gas Operator | Mar 2025 |
| 132 | Fort Exploration Company | FT Smith, AR 72901 | Gas Operator | May 2001 |
| 133 | Fort Operating Company | Fort Smith, AR 72923 | Gas Operator | Nov 2018 |
| 134 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | May 2025 |
| 135 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 136 | G M Oil Properties Inc | Eufaula, OK 74432-0841 | Oil & Gas Operator | Feb 2012 |
| 137 | Galaxy Energy Inc | Stilger, OK 74462 | Gas Operator | Feb 2025 |
| 138 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 139 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 140 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 141 | GHK Company LLC (The) | Oklahoma City, OK 73118-1120 | Oil & Gas Operator | Apr 2018 |
| 142 | Gla Inc | Norman, OK 73070 | Oil & Gas Operator | Feb 2025 |
| 143 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
| 144 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Feb 2025 |
| 145 | Glenwood Operating LLC | Wichita Falls, TX 76309-4529 | Gas Operator | Feb 2025 |
| 146 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 147 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 148 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 149 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 150 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | May 2025 |
| 151 | Great Yellowstone Corp. | | Oil & Gas Operator | Apr 1993 |
| 152 | Greg Hall Oil & Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Feb 2025 |
| 153 | Gulfstream Petroleum Corp. | | Oil & Gas Operator | Feb 2002 |
| 154 | Hadson Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 155 | Hall Edward L | Ada, OK 74820-3321 | Oil & Gas Operator | Feb 2025 |
| 156 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 2025 |
| 157 | Hanna Oil And Gas Company | Fort Smith, AR 72901 | Oil & Gas Operator | Feb 2025 |
| 158 | Hart David | Chickasha, OK 73018-7756 | Oil & Gas Operator | Mar 2015 |
| 159 | HCG Energy Corporation & Subs | | Oil & Gas Operator | Mar 2015 |
| 160 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 161 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 162 | Hogback Exploration Inc | Fort Smith, AR 72916 | Oil & Gas Operator | Feb 2025 |
| 163 | Hoover & Wilson Exp & Prod Inc | Fort Smith, AR 72913-5171 | Gas Operator | Jul 2013 |
| 164 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2024 |
| 165 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |
| 166 | Howden Petroleum Corp | Wetumka, OK 74883 | Gas Operator | Nov 1997 |
| 167 | HRB Operating Company, Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | May 2025 |
| 168 | HRC Production Co | Houston, TX 77024 | Oil & Gas Operator | Jan 2025 |
| 169 | Huitt Joe A | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 170 | Huitt Joe A Rev Trust | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2009 |
| 171 | Hunt Energy Corporation | | Oil & Gas Operator | Feb 2002 |
| 172 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 173 | Illoma Oil Company Inc | Algonquin, IL 60102-1825 | Oil & Gas Operator | Mar 2015 |
| 174 | J & J Energy Service LLC | Bokoshe, OK 74930 | Gas Operator | Feb 2025 |
| 175 | Jaco Energy Company Inc | Stigler, OK 74462 | Gas Operator | Feb 2025 |
| 176 | Jec Operating LLC | Oklahoma City, OK 73114-2717 | Oil & Gas Operator | Feb 2025 |
| 177 | JKB Resources LLC | Stigler, OK 74462 | Oil & Gas Operator | Feb 2025 |
| 178 | Jma Resources, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2025 |
| 179 | JMC Exploration Inc | Dallas, TX 75225-5803 | Gas Operator | Jan 2007 |
| 180 | Jones & Pellow Oil Co | Oklahoma City, OK 73118-1115 | Oil & Gas Operator | Feb 2015 |
| 181 | Joshua Energy LLC | Tulsa, OK 74134-7460 | Gas Operator | Jan 2025 |
| 182 | K G Operating | Hennessey, OK 73742 | Oil & Gas Operator | May 1999 |
| 183 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | May 2025 |
| 184 | Kennedy, Howard E | | Oil & Gas Operator | May 1997 |
| 185 | Kenneth W. Cory, LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Mar 2025 |
| 186 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 187 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Mar 2025 |
| 188 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 189 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Mar 2025 |
| 190 | Kinta Public Works | Kinta, OK 74552 | Oil & Gas Operator | Mar 2011 |
| 191 | Kirby Exploration Co | Houston, TX 77251 | Oil & Gas Operator | Jan 2014 |
| 192 | Klabzuba Oil & Gas Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2012 |
| 193 | Klabzuba Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2013 |
| 194 | Klo LLC | Tulsa, OK 74120-2428 | Oil & Gas Operator | Mar 2025 |
| 195 | Lammerts Robert P | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2002 |
| 196 | Langham Petroleum Expl. Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2009 |
| 197 | Lansden Operating Co LLC | Norman, OK 73070 | Oil & Gas Operator | Dec 1997 |
| 198 | Lariat Petroleum Inc | Tulsa, OK 74119 | Oil & Gas Operator | Sep 2024 |
| 199 | Lee Energy Exploration LTD | Oklahoma City, OK 73102-7114 | Oil & Gas Operator | Jul 2008 |
| 200 | Lefco Resources LLC | Henryetta, OK 74437 | Gas Operator | Feb 2025 |