| 201 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 202 | Entex Petroleum, Inc. | Oklahoma City, OK 73113 | Oil & Gas Operator | Nov 1997 |
| 203 | EOG (Oklahoma) Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2016 |
| 204 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 205 | Eott Energy Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 1995 |
| 206 | Escher Corporation | Oklahoma City, OK 73120 | Oil & Gas Operator | Feb 2025 |
| 207 | Esis Inc | | Oil & Gas Operator | Feb 2017 |
| 208 | Essex Energy Inc | Yukon, OK 73099-5126 | Oil & Gas Operator | Apr 2014 |
| 209 | Evergreen Operating Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 210 | Exok, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2025 |
| 211 | Exploration Associates II LLC | Oklahoma City, OK 73102-8815 | Oil & Gas Operator | Jan 2013 |
| 212 | Express Oil & Gas LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Jan 2025 |
| 213 | F & S Energy LLC | Crescent, OK 73028 | Oil & Gas Operator | Feb 2025 |
| 214 | Finlay Energy, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Jul 1999 |
| 215 | Flusche Herbert J | Wichita Falls, TX 76309 | Oil Operator | Jun 1997 |
| 216 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 217 | Foreman Enterprises, Inc. | Edmond, OK 73003 | Oil & Gas Operator | Feb 2025 |
| 218 | Forest 1 Development Company | Denver, CO 80202-4966 | Oil & Gas Operator | Mar 2008 |
| 219 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Apr 2025 |
| 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 | Friedel Petroleum Corp Inc | Edmond, OK 73012-3495 | Gas Operator | Jan 2025 |
| 223 | Fugo Services Inc | McAlester, OK 74502-1429 | Oil & Gas Operator | Feb 1999 |
| 224 | Fuksa Investments Inc | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2025 |
| 225 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 226 | Gastar Exploration LLC | Tulsa, OK 74136-1921 | Oil & Gas Operator | Jan 2025 |
| 227 | Gda Investments Inc | Oklahoma City, OK 73123-0403 | Oil & Gas Operator | Feb 2025 |
| 228 | Genie Oil & Gas Corporation | Broken Arrow, OK 74013-3783 | Oil & Gas Operator | Jan 2025 |
| 229 | Geo Exploration LLC | Oklahoma City, OK 73120-7116 | Oil & Gas Operator | Jun 2024 |
| 230 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 231 | Geodyne Resources Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 232 | Gerwan Oil Company | Oklahoma City, OK 73159 | Oil Operator | Mar 2011 |
| 233 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 234 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Feb 2025 |
| 235 | Gladiator Operating LLC | Ardmore, OK 73401 | Oil & Gas Operator | Feb 2025 |
| 236 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2025 |
| 237 | Global Natural Res Corp | Houston, TX 77210 | Oil & Gas Operator | Dec 1994 |
| 238 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 239 | Golden Gas Service Company | Tulsa, OK 74114 | Oil & Gas Operator | Feb 2025 |
| 240 | Gomaco Operating Company | Tulsa, OK 74115 | Oil & Gas Operator | Feb 2025 |
| 241 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 242 | Grayhorse Operating Inc | Tulsa, OK 74103-4439 | Oil & Gas Operator | Jan 2025 |
| 243 | Great Northern Gas Company | Denver, CO 80293-0602 | Oil & Gas Operator | Jul 2017 |
| 244 | Green Operating Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2024 |
| 245 | Greenlee Oil And Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Jan 2025 |
| 246 | Guest Petroleum Incorporated | Edmond, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 247 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 248 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2025 |
| 249 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 250 | Hadson Petro USA Inc | | Oil & Gas Operator | Nov 2016 |
| 251 | Halcon Holdings Inc | Ada, OK 74820 | Oil & Gas Operator | Nov 2018 |
| 252 | Harbert Energy Corp | Irving, TX 75015-2510 | Oil & Gas Operator | Feb 1993 |
| 253 | Harris Oil & Gas Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2016 |
| 254 | Harrod Leasing | Edmond, OK 73034 | Oil & Gas Operator | Jan 2025 |
| 255 | Hazelwood Prod & Exp Co LLC | Oklahoma City, OK 73116-9037 | Oil & Gas Operator | Jan 2025 |
| 256 | HCM | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 257 | Heartland Exploration Inc | Edmond, OK 73013 | Oil & Gas Operator | Dec 2015 |
| 258 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2025 |
| 259 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Apr 2025 |
| 260 | High Energy | Cushing, OK 74023 | Oil & Gas Operator | Jan 2025 |
| 261 | Highland Minerals, Inc. | Tulsa, OK 74145-7627 | Oil & Gas Operator | Apr 2015 |
| 262 | Hinkle Engineering, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2016 |
| 263 | Hinkle Oil And Gas Inc | Oklahoma City, OK 73112-4275 | Oil & Gas Operator | Feb 2025 |
| 264 | Hoke Jr J T | Edmond, OK 73034 | Oil Operator | Nov 1998 |
| 265 | Holden Energy Corporation | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2015 |
| 266 | Hollrah Exploration Company | Oklahoma City, OK 73142 | Oil & Gas Operator | Feb 2025 |
| 267 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2024 |
| 268 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |
| 269 | HRC Production Co | Houston, TX 77002 | Oil & Gas Operator | Jan 2025 |
| 270 | Hsumy Oil & Gas Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2007 |
| 271 | Huck Farms LLC | Stratford, OK 74872 | Oil & Gas Operator | Jan 2025 |
| 272 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 273 | Hulen Operating Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Apr 2025 |
| 274 | Hunton Oil & Gas Corporation | Oklahoma City, OK 73154-0191 | Oil & Gas Operator | May 2019 |
| 275 | Hunton Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2025 |
| 276 | Hurley Charles B | Santa Ana, CA 92706 | Oil & Gas Operator | Apr 2015 |
| 277 | I C Gas Amcana Inc | Tulsa, OK 74103-3713 | Oil & Gas Operator | Apr 1996 |
| 278 | Ike Energy LLC | Stillwater, OK 74074-1745 | Oil & Gas Operator | Jan 2025 |
| 279 | Inter-States Oil & Gas Inc | Edmond, OK 73003-0023 | Oil & Gas Operator | Apr 2020 |
| 280 | Intergy Production LLC | Edmond, OK 73083 | Oil & Gas Operator | Feb 2025 |
| 281 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Feb 2025 |
| 282 | J & J Production Company LLC | Okemah, OK 74859 | Oil & Gas Operator | Feb 2025 |
| 283 | Jac-Mac Energy Corporation | Oklahoma City, OK 73170 | Oil & Gas Operator | Feb 2025 |
| 284 | Jackson Petroleum Consult Inc | Dallas, TX 75287 | Oil & Gas Operator | Aug 1994 |
| 285 | Jaco, Troy Inc. | Sherman, TX 75091 | Oil & Gas Operator | Apr 2025 |
| 286 | Jan Oil Company | Oklahoma City, OK 73156 | Oil & Gas Operator | May 2006 |
| 287 | January Investments LLC | Norman, OK 73069-8224 | Oil & Gas Operator | Feb 2025 |
| 288 | Jay Petroleum Inc | Oklahoma City, OK 73154-0526 | Oil & Gas Operator | Mar 2019 |
| 289 | JB Petroleum Corporation | Purcell, OK 73080-6954 | Oil & Gas Operator | Sep 2018 |
| 290 | Jerry Sanner Oil Properties Inc | Enid, OK 73701 | Oil & Gas Operator | Feb 2025 |
| 291 | JHS Energy, Inc | Denver, CO 80222 | Oil & Gas Operator | Dec 2024 |
| 292 | Johnson June | Lawton, OK 73501-9624 | Oil & Gas Operator | Sep 2024 |
| 293 | Jojon Petroleum Company | Dallas, TX 75219 | Oil & Gas Operator | Jan 2025 |
| 294 | Jolen Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2025 |
| 295 | Jrhop Inc | Norman, OK 73072-4615 | Oil & Gas Operator | Dec 2015 |
| 296 | K S & S Oil Company Inc | Terral, TX 73569-5056 | Oil Operator | Feb 2025 |
| 297 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Feb 2025 |
| 298 | Keener Oil & Gas Company | Tulsa, OK 74119-4416 | Oil & Gas Operator | Feb 2025 |
| 299 | Keith F. Walker Oil & Gas Co., LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2025 |
| 300 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |