| 201 | EOG (Oklahoma) Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2016 |
| 202 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 203 | Equal Energy Us Inc | | Oil & Gas Operator | Nov 2019 |
| 204 | Esco Exploration, Inc | Dallas, TX 75201 | Oil & Gas Operator | Mar 2015 |
| 205 | Esis Inc | | Oil & Gas Operator | Feb 2017 |
| 206 | Excelco Energy Inc. | Kingwood, TX 77339 | Oil & Gas Operator | Jul 2018 |
| 207 | Exploration Associates II LLC | Oklahoma City, OK 73102-8815 | Oil & Gas Operator | Jan 2013 |
| 208 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 209 | F C D Oil Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 1995 |
| 210 | Fairway Resources Operating III LLC | | Oil & Gas Operator | Jan 2024 |
| 211 | Fairway Resources Operating, LLC | Southlake, TX 76092 | Oil & Gas Operator | Aug 2022 |
| 212 | Farmer, John O., Inc. | Russell, KS 67665 | Oil & Gas Operator | Dec 2023 |
| 213 | Faulkner Corporation | Oklahoma City, OK 73154-9704 | Oil & Gas Operator | Jan 2017 |
| 214 | Femco SWD Inc | Enid, OK 73702-3907 | Oil Operator | Mar 2014 |
| 215 | Flow Production Company | Midland, TX 79708 | Oil & Gas Operator | Mar 2005 |
| 216 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 217 | Foreman Enterprises, Inc. | Edmond, OK 73003 | Oil & Gas Operator | Feb 2024 |
| 218 | Forest 1 Development Company | Denver, CO 80202-4966 | Oil & Gas Operator | Mar 2008 |
| 219 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2024 |
| 220 | Four-O-One Corporation | Edmond, OK 73013-1977 | Oil & Gas Operator | Mar 2015 |
| 221 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 222 | Fpco Oil & Gas Co. | New Orleans, LA 70160 | Oil & Gas Operator | Dec 2023 |
| 223 | Franks Oil & Gas Inc | Cookson, OK 74427-0310 | Oil & Gas Operator | Oct 1998 |
| 224 | Fremont Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2004 |
| 225 | Fremont Exploration, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2014 |
| 226 | French Jr L R | Midland, TX 79702-8327 | Oil & Gas Operator | Jan 2024 |
| 227 | Fuel Exploration Inc | Denver, CO 80295 | Oil & Gas Operator | Jan 1992 |
| 228 | Fuksa Investments Inc | Hennessey, OK 73742-0291 | Oil & Gas Operator | Feb 2024 |
| 229 | FWB Petroleum, Inc. | Euless, TX 76040 | Oil & Gas Operator | Dec 2000 |
| 230 | G A W Oil Company LLC | Enid, OK 73702-3926 | Oil & Gas Operator | Jan 2024 |
| 231 | G B & D Oil & Gas | Kilgore, TX 75663-2881 | Oil & Gas Operator | Mar 2015 |
| 232 | Gemini Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 233 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 234 | General Minerals Corp | Oklahoma City, OK 73105 | Oil & Gas Operator | Dec 2015 |
| 235 | Genesis Crude Oil LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2000 |
| 236 | Geo Engineering Inc | Houston, TX 77027 | Oil & Gas Operator | Jun 2009 |
| 237 | Geyer Brothers Equipment Company | Noble, OK 73068-8540 | Oil & Gas Operator | Mar 2011 |
| 238 | Gilliland Oil And Gas Inc | Hennessey, OK 73742-0305 | Oil & Gas Operator | Feb 2024 |
| 239 | Gladiator Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 240 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2024 |
| 241 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Jan 2024 |
| 242 | Goff D C Revocable Energy Trust | Fayetteville, AR 72702-1465 | Oil & Gas Operator | Jun 2005 |
| 243 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2024 |
| 244 | Gomaco Inc | Tulsa, OK 74103-5061 | Oil & Gas Operator | Apr 2015 |
| 245 | Gomaco Operating Company | Tulsa, OK 74115-8712 | Oil & Gas Operator | Feb 2024 |
| 246 | Good Vaughn | Enid, OK 73702 | Oil & Gas Operator | Jul 2008 |
| 247 | Good Vaughn Oil Company LLC | Enid, OK 73702-3744 | Oil & Gas Operator | Jun 2019 |
| 248 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 249 | Great Plains Pipeline Company | Tulsa, OK 74135-6405 | Oil & Gas Operator | Jul 2014 |
| 250 | Green Valley Disposal Serv LLC | Waynoka, OK 73860-0194 | Oil Operator | Feb 2024 |
| 251 | Greenhead Energy Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 252 | Greer Tom R | Ponca City, OK 74602-2444 | Oil & Gas Operator | May 2013 |
| 253 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2024 |
| 254 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 255 | Gulfstream Petroleum Corp. | | Oil & Gas Operator | Feb 2002 |
| 256 | Gungoll Henry H. Associates | Enid, OK 73701 | Oil & Gas Operator | Jan 2024 |
| 257 | H2ox Operating LLC | | Oil Operator | Feb 2024 |
| 258 | Hadson Petro USA Inc | | Oil & Gas Operator | Nov 2016 |
| 259 | Halcon Holdings Inc | Ada, OK 74820 | Oil & Gas Operator | Nov 2018 |
| 260 | Ham Oil Company, LLC | | Oil Operator | Sep 2022 |
| 261 | Hamil Oil & Gas LLC | | Oil & Gas Operator | Jan 2024 |
| 262 | Hammer Oil Properties Inc | Enid, OK 73706-0144 | Oil & Gas Operator | Oct 2017 |
| 263 | Harbor Resources LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Apr 2024 |
| 264 | Hartman Oil Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Dec 2023 |
| 265 | Hazelwood Prod & Exp Co LLC | Oklahoma City, OK 73116-9037 | Oil & Gas Operator | Dec 2023 |
| 266 | Hazlewood Oil & Gas Co Inc | Oklahoma City, OK 73139-9353 | Oil & Gas Operator | Apr 2022 |
| 267 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 268 | Heartland Exploration | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2000 |
| 269 | Heartlands Development Co Inc | Bristow, OK 74010-3826 | Oil & Gas Operator | May 2017 |
| 270 | Helena Resources LLC | Helena, OK 73741-4120 | Oil & Gas Operator | Jan 2024 |
| 271 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2024 |
| 272 | Hennessey Oil & Gas LLC | Hennessey, OK 73742-0212 | Oil & Gas Operator | Jan 2024 |
| 273 | Henry Gungoll Operating Inc | Enid, OK 73702-6209 | Oil & Gas Operator | Feb 2024 |
| 274 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2024 |
| 275 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 276 | High Energy | Cushing, OK 74023-1762 | Oil & Gas Operator | Jan 2024 |
| 277 | High Sierra Crude Oil& Marketing LLC | Ardmore, OK 73401 | Oil Operator | Nov 2013 |
| 278 | Hill Resources Inc | | Oil & Gas Operator | Nov 2022 |
| 279 | Himco Oil & Gas, Inc. | Enid, OK 73702 | Oil & Gas Operator | Jan 2024 |
| 280 | Hinkle Engineering, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2016 |
| 281 | Hinkle Oil And Gas Inc | Oklahoma City, OK 73112-4275 | Oil & Gas Operator | Feb 2024 |
| 282 | Hodgden Operating Co., Inc. | Enid, OK 73702 | Oil & Gas Operator | Feb 2024 |
| 283 | Hoehn French | Enid, OK 73701-5600 | Oil & Gas Operator | Oct 1996 |
| 284 | Holden Energy Corporation | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2015 |
| 285 | Hondo Oil & Gas Company | Roswell, NM 88202 | Oil & Gas Operator | Aug 2006 |
| 286 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Jan 2024 |
| 287 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |
| 288 | Hungerford Oil & Gas Inc | Helena, OK 73741 | Oil & Gas Operator | Nov 2000 |
| 289 | Hunt Engineering Inc | Norman, OK 73069-4093 | Oil & Gas Operator | Feb 2019 |
| 290 | Hux Oil Company LLC | Kingfisher, OK 73750-0474 | Oil & Gas Operator | Jan 2024 |
| 291 | Hy-Carb Energy Inc | | Oil & Gas Operator | Feb 2009 |
| 292 | Impact Energy Operating LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Feb 2024 |
| 293 | Inca Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2009 |
| 294 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2024 |
| 295 | Inland Oil Corporation | Sapulpa, OK 74067-0943 | Oil & Gas Operator | Jan 2024 |
| 296 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Feb 2024 |
| 297 | Investors Resources Corp | Enid, OK 73702-1852 | Oil & Gas Operator | Feb 2024 |
| 298 | Jaco, Troy Inc. | Sherman, TX 75091 | Oil & Gas Operator | Apr 2024 |
| 299 | James Petroleum Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2014 |
| 300 | Jan Oil Company | Oklahoma City, OK 73156 | Oil & Gas Operator | May 2006 |