| 201 | Driver Energy Of Texas | Dallas, TX 75379-5951 | Oil & Gas Operator | Apr 2011 |
| 202 | Drumright Well Service Inc | Oilton, OK 74052 | Oil & Gas Operator | Nov 2024 |
| 203 | Duncan Energy Company | Denver, CO 80202 | Oil & Gas Operator | Mar 2008 |
| 204 | Duncan Oil Properties, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
| 205 | Eagle Creek Resources, LLC | Sewickley, PA 15143 | Oil & Gas Operator | Dec 2023 |
| 206 | Eagle Road Oil LLC | Tulsa, OK 74103-3312 | Oil & Gas Operator | Nov 2024 |
| 207 | Eagle Rock Mid-Continent Operating LLC | Tulsa, OK 74103-3703 | Oil & Gas Operator | Nov 2024 |
| 208 | Earlsboro Energies Corporation | Oklahoma City, OK 73116-3605 | Oil & Gas Operator | Oct 2024 |
| 209 | Ecc Energy Corporation | Dewey, OK 74029 | Oil & Gas Operator | Feb 2020 |
| 210 | Edinger Engineering, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2024 |
| 211 | Edinger Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2007 |
| 212 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 213 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Dec 2024 |
| 214 | Elite Resources Inc | Cleveland, OK 74020 | Oil & Gas Operator | Dec 2024 |
| 215 | Elite Tank Trucks, Inc | | Oil & Gas Operator | Dec 2024 |
| 216 | Ells Jr Harry A | Englewood, CO 80150 | Gas Operator | Feb 2017 |
| 217 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Dec 2024 |
| 218 | Enerfin Resources I Limited Partnership | Houston, TX 77077-2386 | Oil & Gas Operator | Apr 2023 |
| 219 | Energex Corp | Springfield, MO 65807 | Oil & Gas Operator | Nov 2024 |
| 220 | Energon Oil, Inc. | Amarillo, TX 79114 | Oil & Gas Operator | Mar 2025 |
| 221 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 222 | England Operating LLC | Littleton, CO 80120-4529 | Oil & Gas Operator | Nov 2014 |
| 223 | EOG (Oklahoma) Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2016 |
| 224 | Eola Reclaimers Inc | Maysville, OK 73057 | Oil & Gas Operator | Nov 2005 |
| 225 | Eott Energy Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 1995 |
| 226 | Epoch Resources Of Texas Inc | Port Aransas, TX 78373-1637 | Oil & Gas Operator | Nov 2014 |
| 227 | Equal Energy Us Inc | Tulsa, OK 74103-4621 | Oil & Gas Operator | Nov 2019 |
| 228 | Esis Inc | | Oil & Gas Operator | Feb 2017 |
| 229 | Esper Production Co | Arlington, TX 76011-2427 | Oil & Gas Operator | Apr 2015 |
| 230 | Excelco Energy Inc. | Kingwood, TX 77339 | Oil & Gas Operator | Jul 2018 |
| 231 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Mar 2025 |
| 232 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Dec 2024 |
| 233 | Fairchild Well Service Inc | Ponca City, OK 74602-0470 | Oil & Gas Operator | Jun 2006 |
| 234 | Fitzsimmons Randall W & Deborah S | Bartesville, OK 74006 | Oil & Gas Operator | Nov 2024 |
| 235 | Flag-Redfern Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Jul 2002 |
| 236 | Foreman Enterprises, Inc. | Edmond, OK 73003 | Oil & Gas Operator | Dec 2024 |
| 237 | Forest 1 Development Company | Denver, CO 80202-4966 | Oil & Gas Operator | Mar 2008 |
| 238 | Fossil Creek Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2025 |
| 239 | Four-O-One Corporation | Edmond, OK 73013-1977 | Oil & Gas Operator | Mar 2015 |
| 240 | Fpco Oil & Gas Co. | New Orleans, LA 70160 | Oil & Gas Operator | Nov 2024 |
| 241 | Fremont Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2004 |
| 242 | Fremont Exploration, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2014 |
| 243 | Fugazzi Daniel B | Enid, OK 73703 | Gas Operator | Nov 2024 |
| 244 | Fuksa Investments Inc | Hennessey, OK 73742 | Oil & Gas Operator | Dec 2024 |
| 245 | Fulcrum Exploration, LLC. | Flower Mound, TX 75028 | Oil & Gas Operator | Nov 2024 |
| 246 | G & C Petroleum Inc | Yale, OK 74085-2502 | Oil & Gas Operator | Dec 2024 |
| 247 | G & G Saltwater Disposal Systems Inc | Perry, OK 73077-0854 | Oil Operator | Mar 2005 |
| 248 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 249 | G M C Oil & Gas LTD | Oklahoma City, OK 73102-8804 | Oil & Gas Operator | Sep 1999 |
| 250 | Ganer Mark Oil & Gas | Owasso, OK 74055 | Oil & Gas Operator | Aug 2005 |
| 251 | Ganer Oil Company | Blackwell, OK 74631-4221 | Oil & Gas Operator | Jan 2022 |
| 252 | Garry Davis Oil LLC | Tonkawa, OK 74653-0040 | Oil & Gas Operator | Nov 2024 |
| 253 | Garvey Oil And Gas LLC | Kellyville, OK 74039-4428 | Oil & Gas Operator | Mar 2015 |
| 254 | Gateway Resources U.S.A., Inc. | Bartlesville, OK 74006 | Oil & Gas Operator | Nov 2024 |
| 255 | Gear Petroleum Company, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Dec 2009 |
| 256 | Gemini Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2024 |
| 257 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 258 | General Oil Company, Inc. | Wichita, KS 67213 | Oil & Gas Operator | Mar 2025 |
| 259 | Genie Oil & Gas Corporation | Broken Arrow, OK 74013-3783 | Oil & Gas Operator | Nov 2024 |
| 260 | Geo American Resources Inc | Tulsa, OK 74130-1575 | Oil & Gas Operator | Nov 2024 |
| 261 | Geo Engineering, Inc. | Houston, TX 77027 | Oil & Gas Operator | Jun 2009 |
| 262 | Geo-Earth Exploration Co Inc | Stillwater, OK 74076 | Oil & Gas Operator | May 1994 |
| 263 | Geyer Brothers Equipment Company | Noble, OK 73068-8540 | Oil & Gas Operator | Mar 2011 |
| 264 | Gilliland Oil And Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Dec 2024 |
| 265 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Dec 2024 |
| 266 | Glasgow Jr W R | Hominy, OK 74035 | Oil & Gas Operator | Apr 2014 |
| 267 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2024 |
| 268 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Nov 2024 |
| 269 | GLM Energy Inc | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2024 |
| 270 | Gomaco Inc | Tulsa, OK 74103-5061 | Oil & Gas Operator | Apr 2015 |
| 271 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 272 | Gray Lloyd Energy Inc | Oklahoma City, OK 73120-8112 | Oil & Gas Operator | Nov 2005 |
| 273 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2025 |
| 274 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2024 |
| 275 | Grubb Ronald J | Clinton, OK 73601-0906 | Oil & Gas Operator | Aug 2013 |
| 276 | Guest Petroleum Incorporated | Edmond, OK 73013 | Oil & Gas Operator | Dec 2024 |
| 277 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 278 | Gulfstream Petroleum Corp. | | Oil & Gas Operator | Feb 2002 |
| 279 | H & H Oil Productions | Tulsa, OK 74145 | Oil Operator | Jul 1999 |
| 280 | H.L.S. Energy Co., Inc. | Uvalde, TX 78801 | Oil & Gas Operator | Aug 2003 |
| 281 | Hadson Petro USA Inc | | Oil & Gas Operator | Nov 2016 |
| 282 | Hadson Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 283 | Halcon Holdings Inc | Ada, OK 74820 | Oil & Gas Operator | Nov 2018 |
| 284 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 285 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2024 |
| 286 | Hamil Oil & Gas LLC | Kingfisher, OK 73750-6500 | Oil & Gas Operator | Nov 2024 |
| 287 | Hamon Jake L | Dallas, TX 75201-3902 | Oil & Gas Operator | Nov 1997 |
| 288 | Happy Hill Operating LLC | Guthrie, OK 73044-7361 | Oil & Gas Operator | Oct 2017 |
| 289 | Harbert Energy Corp | Irving, TX 75015-2510 | Oil & Gas Operator | Feb 1993 |
| 290 | Hargraves Elston | Ponca City, OK 74604 | Oil & Gas Operator | Jul 2003 |
| 291 | Harris Minerals Corp (The) | Oklahoma City, OK 73162-1045 | Oil & Gas Operator | Nov 2024 |
| 292 | Hazelwood Prod & Exp Co LLC | Oklahoma City, OK 73116-9037 | Oil & Gas Operator | Nov 2024 |
| 293 | Heartland Exploration | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2000 |
| 294 | Heartland Exploration Inc | Edmond, OK 73013 | Oil & Gas Operator | Dec 2015 |
| 295 | Hegco Canada Inc | | Oil & Gas Operator | Nov 2003 |
| 296 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Nov 2024 |
| 297 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Mar 2025 |
| 298 | Hewitt Energy Group, Inc. | Salt Lake City, UT 84111 | Oil & Gas Operator | Apr 2015 |
| 299 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Mar 2025 |
| 300 | Highmount Operating LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2014 |