| 301 | Excelco Energy Inc. | Kingwood, TX 77339 | Oil & Gas Operator | Jul 2018 |
| 302 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Jan 2025 |
| 303 | Exok, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2025 |
| 304 | Exploration Associates II LLC | Oklahoma City, OK 73102-8815 | Oil & Gas Operator | Jan 2013 |
| 305 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2025 |
| 306 | F C D Oil Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 1995 |
| 307 | Fairway Resources Operating III LLC | Houston, TX 77002-2728 | Oil & Gas Operator | Jan 2025 |
| 308 | Farmers Energy Corporation | Tulsa, OK 74103-3525 | Oil & Gas Operator | Nov 2021 |
| 309 | Faulconer Energy, LLC | Tyler, TX 75711 | Oil & Gas Operator | Apr 2025 |
| 310 | Faulconer Vernon E Inc | Tyler, TX 75711 | Oil & Gas Operator | Feb 2025 |
| 311 | Faulkner Corporation | Oklahoma City, OK 73154-9704 | Oil & Gas Operator | Jan 2017 |
| 312 | FBF Energy LLC | Tulsa, OK 74120 | Oil & Gas Operator | Feb 2025 |
| 313 | Femco SWD Inc | Enid, OK 73702-3907 | Oil Operator | Mar 2014 |
| 314 | Five Star Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Jan 2025 |
| 315 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 316 | Foreman Enterprises, Inc. | Edmond, OK 73003 | Oil & Gas Operator | Feb 2025 |
| 317 | Fossil Creek Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Apr 2025 |
| 318 | Foster Oilfield Service | Canton, OK 73724 | Oil & Gas Operator | Jan 2025 |
| 319 | Four Seas Exploration LLC | Oklahoma City, OK 73101-1557 | Oil & Gas Operator | Dec 2019 |
| 320 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 321 | Fpco Oil & Gas Co. | New Orleans, LA 70160 | Oil & Gas Operator | Dec 2024 |
| 322 | Franks Oil & Gas Inc | Cookson, OK 74427-0310 | Oil & Gas Operator | Oct 1998 |
| 323 | Freepoint Commodities LLC | Stamford, CT 6902 | Oil & Gas Operator | Jul 1992 |
| 324 | Freeport-McMoran Inc. | New Orleans, LA 70160 | Oil & Gas Operator | Apr 1997 |
| 325 | Fremont Exploration, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2014 |
| 326 | French Jr L R | Midland, TX 79702 | Oil & Gas Operator | Jan 2025 |
| 327 | Frontier Energy Serv LLC | Enid, OK 73702-1187 | Oil & Gas Operator | Jun 2016 |
| 328 | Frontier Operating Corporation | Albany, TX 76430 | Oil & Gas Operator | Apr 2025 |
| 329 | Fuksa Investments Inc | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2025 |
| 330 | Fuller Petroleum Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 331 | Fuller Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 332 | Fullspike Energy LLC | Boyd, TX 76023 | Oil & Gas Operator | Apr 2025 |
| 333 | G A W Oil Company LLC | Enid, OK 73702-3926 | Oil & Gas Operator | Feb 2025 |
| 334 | G B & D Oil & Gas | Kilgore, TX 75663-2881 | Oil & Gas Operator | Mar 2015 |
| 335 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 336 | Gala Resources, LTD. | Graham, TX 76450 | Oil & Gas Operator | Jan 2025 |
| 337 | Gda Investments Inc | Oklahoma City, OK 73123-0403 | Oil & Gas Operator | Feb 2025 |
| 338 | General Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jun 1993 |
| 339 | Genesis Crude Oil LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2000 |
| 340 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 341 | George H Russell Oil & Gas Investments Inc | Mustang, OK 73064 | Oil & Gas Operator | Oct 2023 |
| 342 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 343 | Gilliland Oil And Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2025 |
| 344 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Jan 2025 |
| 345 | Goff D C Revocable Energy Trust | Fayetteville, AR 72702-1465 | Oil & Gas Operator | Jun 2005 |
| 346 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 347 | Good Vaughn | Enid, OK 73702 | Oil & Gas Operator | Jul 2008 |
| 348 | Good Vaughn Oil Company LLC | Enid, OK 73702-3744 | Oil & Gas Operator | Jun 2019 |
| 349 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 350 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 351 | GPM Gas Corporation | Oklahoma City, OK 73102-5627 | Oil & Gas Operator | Jun 2000 |
| 352 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 353 | Granada Exploration LLC | Edmond, OK 73034-4172 | Oil & Gas Operator | Jan 2025 |
| 354 | Grand Lake Resources | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2025 |
| 355 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2025 |
| 356 | Great Plains Pipeline Company | Tulsa, OK 74135-6405 | Oil & Gas Operator | Jul 2014 |
| 357 | Green Operating Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2024 |
| 358 | Green River Resources Inc. | Keystone, CO 80435 | Oil & Gas Operator | Apr 2025 |
| 359 | Greenhead Energy Operating LLC | Oklahoma City, OK 73131 | Oil & Gas Operator | Feb 2025 |
| 360 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 361 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Jan 2025 |
| 362 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 363 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 364 | Gulfstream Petroleum Corp. | | Oil & Gas Operator | Feb 2002 |
| 365 | GW Petroleum Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 1993 |
| 366 | H.L.S. Energy Co., Inc. | Uvalde, TX 78801 | Oil & Gas Operator | Aug 2003 |
| 367 | H2ok LLC | Marble Falls, TX 78654 | Oil & Gas Operator | Feb 2025 |
| 368 | Hadson Petro USA Inc | | Oil & Gas Operator | Nov 2016 |
| 369 | Halcon Holdings Inc | Ada, OK 74820 | Oil & Gas Operator | Nov 2018 |
| 370 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 371 | Hallum Construction Inc | Seminole, OK 74868-2427 | Oil & Gas Operator | Sep 2014 |
| 372 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2024 |
| 373 | Hamil Oil & Gas LLC | Kingfisher, OK 73750-6500 | Oil & Gas Operator | Jan 2025 |
| 374 | Hamon Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2011 |
| 375 | Harbor Resources LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Apr 2025 |
| 376 | Harding & Shelton Inc | Oklahoma City, OK 73104-2410 | Oil & Gas Operator | Jan 2025 |
| 377 | Harding And Shelton Exploration LLC | Oklahoma City, OK 73101-1557 | Oil & Gas Operator | Jan 2025 |
| 378 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 379 | Hazelwood Louis J | Albuquerque, NM 87111-6870 | Oil & Gas Operator | Feb 2023 |
| 380 | Hazelwood Prod & Exp Co LLC | Oklahoma City, OK 73116-9037 | Oil & Gas Operator | Jan 2025 |
| 381 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 382 | Heartland Exploration Inc | Edmond, OK 73013 | Oil & Gas Operator | Dec 2015 |
| 383 | Helena Resources LLC | Helena, OK 73741-4120 | Oil & Gas Operator | Jan 2025 |
| 384 | Helke Exploration Company | Oklahoma City, OK 73112-7201 | Oil & Gas Operator | Feb 2000 |
| 385 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2025 |
| 386 | Hennessey Oil & Gas LLC | Hennessey, OK 73742-0212 | Oil & Gas Operator | Sep 2024 |
| 387 | Henry Gungoll Operating Inc | Enid, OK 73703 | Oil & Gas Operator | Feb 2025 |
| 388 | Hep Oil Company LTD | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 389 | Hep Oil GP, LLC | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 390 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2025 |
| 391 | Hibbert R E Estate Of | Houston, TX 77002-3211 | Oil & Gas Operator | Apr 2015 |
| 392 | High Energy | Cushing, OK 74023 | Oil & Gas Operator | Jan 2025 |
| 393 | Highland Energy Co | Dallas, TX 75201 | Oil & Gas Operator | Jun 1994 |
| 394 | Hiland Energy LP | Enid, OK 73701-0032 | Oil & Gas Operator | Dec 2022 |
| 395 | Hillside Resources | Bartlesville, OK 74005 | Oil & Gas Operator | Jan 2007 |
| 396 | Himco Oil & Gas, Inc. | Enid, OK 73702 | Oil & Gas Operator | Jan 2025 |
| 397 | Hinkle Engineering, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2016 |
| 398 | Hodgden Operating Co., Inc. | Enid, OK 73702 | Oil & Gas Operator | Feb 2025 |
| 399 | Hodge T F | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2007 |
| 400 | Hoge Oil & Gas Expl Inc | Edmond, OK 73013-3709 | Oil & Gas Operator | Sep 2023 |