| 301 | Essex Energy Inc | Yukon, OK 73099-5126 | Oil & Gas Operator | Apr 2014 |
| 302 | Evolution Energy LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Nov 2025 |
| 303 | Excelco Energy Inc. | Kingwood, TX 77339 | Oil & Gas Operator | Jul 2018 |
| 304 | Exok Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Nov 2025 |
| 305 | Exoko Operating Company Inc | Tulsa, OK 74170-0246 | Oil & Gas Operator | Jan 2006 |
| 306 | Exploration Associates II LLC | Oklahoma City, OK 73102-8815 | Oil & Gas Operator | Jan 2013 |
| 307 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Feb 2026 |
| 308 | F & S Energy LLC | Crescent, OK 73028 | Oil & Gas Operator | Dec 2025 |
| 309 | F C D Oil Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 1995 |
| 310 | Farrar Carolyn Dba C J Investments | Kingfisher, OK 73750 | Oil & Gas Operator | Sep 2024 |
| 311 | Faulconer Energy, LLC | Tyler, TX 75711 | Oil & Gas Operator | Feb 2026 |
| 312 | Faulconer, Vernon E., Inc. | Tyler, TX 75711 | Oil & Gas Operator | Dec 2025 |
| 313 | Faulkner Corporation | Oklahoma City, OK 73154-9704 | Oil & Gas Operator | Jan 2017 |
| 314 | Felix Energy LLC | Denver, CO 80202-1467 | Oil & Gas Operator | Nov 2025 |
| 315 | Femco SWD Inc | Enid, OK 73702-3907 | Oil Operator | Mar 2014 |
| 316 | Flynn Energy Corporation | Tulsa, OK 74137 | Oil & Gas Operator | Mar 1993 |
| 317 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 318 | Foreman Enterprises Inc | Edmond, OK 73003 | Oil & Gas Operator | Oct 2025 |
| 319 | Forest Oil Permian Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 320 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Feb 2026 |
| 321 | Fossil Fuels Inc. | Dallas, TX 75201 | Oil & Gas Operator | May 2000 |
| 322 | Four-O-One Corporation | Edmond, OK 73013-1977 | Oil & Gas Operator | Mar 2015 |
| 323 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 324 | Fpco Oil & Gas Co. | New Orleans, LA 70160 | Oil & Gas Operator | Sep 2025 |
| 325 | Fremont Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2004 |
| 326 | Fremont Exploration, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2014 |
| 327 | French Jr L R | Midland, TX 79702 | Oil & Gas Operator | Nov 2025 |
| 328 | Frontier Operating Corporation | Albany, TX 76430 | Oil & Gas Operator | Feb 2026 |
| 329 | Fuksa Investments Inc | Hennessey, OK 73742 | Oil & Gas Operator | Dec 2025 |
| 330 | Fullspike Energy LLC | Boyd, TX 76023 | Oil & Gas Operator | Feb 2026 |
| 331 | FW Midcon I, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Nov 2025 |
| 332 | G A W Oil Company LLC | Enid, OK 73702-3926 | Oil & Gas Operator | Dec 2025 |
| 333 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 334 | Gai-Jin Trading Company LLC | Oklahoma City, OK 73107 | Oil & Gas Operator | Sep 2024 |
| 335 | Ganer Oil Company | Blackwell, OK 74631-4221 | Oil & Gas Operator | Jan 2022 |
| 336 | Garms Oil Inc | Kingfisher, OK 73750-4207 | Oil & Gas Operator | Nov 2025 |
| 337 | Gary L. Deaton Corporation | Oklahoma City, OK 73105-3023 | Oil & Gas Operator | Mar 2015 |
| 338 | Gary M Lake & Company | Edmond, OK 73012-8208 | Oil & Gas Operator | Aug 2021 |
| 339 | Gastar Exploration LLC | Tulsa, OK 74136-1921 | Oil & Gas Operator | Nov 2025 |
| 340 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 341 | General Producing Co | Houston, TX 77002 | Oil & Gas Operator | Jun 1993 |
| 342 | Genie Oil & Gas Corporation | Broken Arrow, OK 74013-3783 | Oil & Gas Operator | Nov 2025 |
| 343 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 344 | Geodyne Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 345 | George H Russell Oil & Gas Investments Inc | Mustang, OK 73064 | Oil & Gas Operator | Oct 2023 |
| 346 | Get Pumping LLC | Drummond, OK 73735 | Oil & Gas Operator | Nov 2025 |
| 347 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 348 | Getty Reserve Oil Inc | White Plains, NY 10650 | Oil & Gas Operator | Mar 2005 |
| 349 | GHK Company LLC (The) | Oklahoma City, OK 73118-1120 | Oil & Gas Operator | Apr 2018 |
| 350 | Gilliland Oil And Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Dec 2025 |
| 351 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Dec 2025 |
| 352 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Nov 2025 |
| 353 | GLM Energy Inc | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2025 |
| 354 | Godfrey Oil Properties | Madill, OK 73446 | Oil & Gas Operator | Nov 2025 |
| 355 | Goff D C Revocable Energy Trust | Fayetteville, AR 72702-1465 | Oil & Gas Operator | Jun 2005 |
| 356 | Golden Gas Energies Inc | | Oil & Gas Operator | Jan 1999 |
| 357 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2025 |
| 358 | Gomaco Inc | Tulsa, OK 74103-5061 | Oil & Gas Operator | Apr 2015 |
| 359 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 360 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 361 | Graham-Michaelis Corporation | Wichita, KS 67201 | Oil & Gas Operator | Dec 2010 |
| 362 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Feb 2026 |
| 363 | Great Horned Owls, LLC | Katy, TX 77494 | Oil & Gas Operator | Nov 2025 |
| 364 | Great Plains Pipeline Company | Tulsa, OK 74135-6405 | Oil & Gas Operator | Jul 2014 |
| 365 | Great Yellowstone Corporation | | Oil & Gas Operator | Apr 1993 |
| 366 | Green Operating Company Inc | Tulsa, OK 74135 | Oil & Gas Operator | Sep 2025 |
| 367 | Greenlee Oil And Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Sep 2025 |
| 368 | Greenwood Energy Inc | Oklahoma City, OK 73116-9083 | Oil & Gas Operator | Mar 2015 |
| 369 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 370 | Grizzly Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2025 |
| 371 | Gruenerwald WM & Assoc Inc | Colorado Spring, CO 80960-0669 | Oil & Gas Operator | Jan 2002 |
| 372 | Grynberg Petroleum Company | Greenwood Vge, CO 80111-3326 | Oil & Gas Operator | Oct 2019 |
| 373 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jan 2026 |
| 374 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 375 | Gulfstream Petroleum Corp | | Oil & Gas Operator | Feb 2002 |
| 376 | Gungoll Carl E Estate | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Aug 2000 |
| 377 | Gungoll Henry H. Associates | Enid, OK 73701 | Oil & Gas Operator | Jun 2025 |
| 378 | GW Petroleum Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 1993 |
| 379 | H G & G Inc | Edmond, OK 73034 | Oil & Gas Operator | Jan 2006 |
| 380 | H-Petro-R Inc | Edmond, OK 73013 | Oil & Gas Operator | Sep 2025 |
| 381 | Hadson Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 382 | Halcon Holdings Inc | Ada, OK 74820 | Oil & Gas Operator | Oct 2025 |
| 383 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 384 | Hamil Oil & Gas LLC | Kingfisher, OK 73750-6500 | Oil & Gas Operator | Nov 2025 |
| 385 | Harbor Resources LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Feb 2026 |
| 386 | Hardin Productions | Okemah, OK 74859 | Oil & Gas Operator | Dec 2006 |
| 387 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 388 | Harrell Verlan W | Oklahoma City, OK 73102-7201 | Oil & Gas Operator | Nov 1999 |
| 389 | Harris Oil & Gas Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2016 |
| 390 | Hazelwood Prod & Exp Co LLC | Oklahoma City, OK 73116-9037 | Oil & Gas Operator | Oct 2025 |
| 391 | HCM | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 392 | Heartland Pumping | Hennessey, OK 73742-7311 | Oil & Gas Operator | Nov 2025 |
| 393 | Hemstead Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2001 |
| 394 | Hennessey Oil & Gas LLC | Hennessey, OK 73742-0212 | Oil & Gas Operator | Sep 2024 |
| 395 | Henry Gungoll Operating Inc | Enid, OK 73703 | Oil & Gas Operator | Dec 2025 |
| 396 | Hep Oil Company, LTD. | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 397 | Hep Oil GP, LLC | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 398 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Feb 2026 |
| 399 | High Energy | Cushing, OK 74023 | Oil & Gas Operator | Nov 2025 |
| 400 | Highland Minerals Inc | Tulsa, OK 74145-7627 | Oil & Gas Operator | Apr 2015 |