| 301 | Flicka Energy Inc | Crescent, OK 73028 | Oil & Gas Operator | Mar 2022 |
| 302 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 303 | Foreman Enterprises Inc | Edmond, OK 73003 | Oil & Gas Operator | Oct 2025 |
| 304 | Forest 1 Development Company | Denver, CO 80202-4966 | Oil & Gas Operator | Mar 2008 |
| 305 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Jun 2026 |
| 306 | Forte Energy Corpration | Houston, TX 77024-1209 | Oil & Gas Operator | Jan 1995 |
| 307 | Fortuna Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2014 |
| 308 | Four-O-One Corporation | Edmond, OK 73013-1977 | Oil & Gas Operator | Mar 2015 |
| 309 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 310 | Fpco Oil & Gas Co. | New Orleans, LA 70160 | Oil & Gas Operator | Feb 2026 |
| 311 | Freedom Operating Company LLC | Tulsa, OK 74136-6834 | Oil & Gas Operator | Mar 2026 |
| 312 | Fremont Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2004 |
| 313 | Fuksa Investments Inc | Hennessey, OK 73742 | Oil & Gas Operator | Mar 2026 |
| 314 | Fullspike Energy LLC | Boyd, TX 76023 | Oil & Gas Operator | Jun 2026 |
| 315 | G & C Petroleum Inc | Yale, OK 74085-2502 | Oil & Gas Operator | Feb 2026 |
| 316 | G A W Oil Company LLC | Enid, OK 73702-3926 | Oil & Gas Operator | Mar 2026 |
| 317 | G M C Oil & Gas LTD | Oklahoma City, OK 73102-8804 | Oil & Gas Operator | Sep 1999 |
| 318 | Gastar Exploration LLC | Tulsa, OK 74136-1921 | Oil & Gas Operator | Feb 2026 |
| 319 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 320 | General Producing Co | Houston, TX 77002 | Oil & Gas Operator | Jun 1993 |
| 321 | Genesis Inc | Seminole, OK 74818-1647 | Oil & Gas Operator | Sep 2014 |
| 322 | Genie Oil & Gas Corporation | Broken Arrow, OK 74013-3783 | Oil & Gas Operator | Feb 2026 |
| 323 | Geno Oil & Gas Corp | | Oil & Gas Operator | Sep 2009 |
| 324 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 325 | Geodyne Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 326 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 327 | GHK Company LLC (The) | Oklahoma City, OK 73118-1120 | Oil & Gas Operator | Apr 2018 |
| 328 | Gilliland Oil And Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Mar 2026 |
| 329 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Mar 2026 |
| 330 | GLB Exploration Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2026 |
| 331 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Mar 2026 |
| 332 | GLM Energy Inc | Oklahoma City, OK 73142 | Oil & Gas Operator | Feb 2026 |
| 333 | Goff D C Revocable Energy Trust | Fayetteville, AR 72702-1465 | Oil & Gas Operator | Jun 2005 |
| 334 | Gomaco Inc | Tulsa, OK 74103-5061 | Oil & Gas Operator | Apr 2015 |
| 335 | Gomaco Operating Company | Tulsa, OK 74115 | Oil & Gas Operator | Mar 2026 |
| 336 | Gordon Brothers Oil Company | Stroud, OK 74079 | Oil & Gas Operator | Jul 2017 |
| 337 | Gordon Robert Oil Company | Stroud, OK 74070-0366 | Oil & Gas Operator | Jul 2001 |
| 338 | Great Horned Owls, LLC | Katy, TX 77494 | Oil & Gas Operator | Mar 2026 |
| 339 | Great Plains Pipeline Company | Tulsa, OK 74135-6405 | Oil & Gas Operator | Jul 2014 |
| 340 | Green Operating Company Inc | Tulsa, OK 74135 | Oil & Gas Operator | Feb 2026 |
| 341 | Greenhead Energy Operating LLC | Oklahoma City, OK 73131 | Oil & Gas Operator | Mar 2026 |
| 342 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2026 |
| 343 | Grooms T D | Stillwater, OK 74075-3600 | Oil & Gas Operator | Oct 2001 |
| 344 | Grubb Ronald J | Clinton, OK 73601-0906 | Oil & Gas Operator | Aug 2013 |
| 345 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 346 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2026 |
| 347 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 348 | GW Petroleum Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 1993 |
| 349 | Gypsyglenn Oil Company LLC | Tulsa, OK 74119-4809 | Oil & Gas Operator | Mar 2026 |
| 350 | H & H Exploration | Tulsa, OK 74132 | Oil & Gas Operator | Jan 2006 |
| 351 | H & H Oil Productions | Tulsa, OK 74145 | Oil Operator | Jul 1999 |
| 352 | H.L.S. Energy Co., Inc. | Uvalde, TX 78801 | Oil & Gas Operator | Aug 2003 |
| 353 | Hadson Petro USA Inc | | Oil & Gas Operator | Nov 2016 |
| 354 | Hadson Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 355 | Halcon Holdings Inc | Ada, OK 74820 | Oil & Gas Operator | Feb 2026 |
| 356 | Hall Edward L | Ada, OK 74820-3321 | Oil & Gas Operator | Dec 2025 |
| 357 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 358 | Hamil Oil & Gas LLC | Kingfisher, OK 73750-6500 | Oil & Gas Operator | Feb 2026 |
| 359 | Hamon Jake L | Dallas, TX 75201-3902 | Oil & Gas Operator | Nov 1997 |
| 360 | Happy Hill Operating LLC | Guthrie, OK 73044-7361 | Oil & Gas Operator | Oct 2017 |
| 361 | Harbor Resources LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jun 2026 |
| 362 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 363 | Harrington Billy B | Depew, OK 74028-3495 | Oil & Gas Operator | May 2006 |
| 364 | Harrod Leasing | Edmond, OK 73034 | Oil & Gas Operator | Mar 2026 |
| 365 | Hazelwood Prod & Exp Co LLC | Oklahoma City, OK 73116-9037 | Oil & Gas Operator | Feb 2026 |
| 366 | Hazlewood Oil & Gas Co Inc | Oklahoma City, OK 73139-9353 | Oil & Gas Operator | Apr 2022 |
| 367 | Heartland Exploration | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2000 |
| 368 | Heartland Exploration Inc | Edmond, OK 73013 | Oil & Gas Operator | Dec 2015 |
| 369 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Feb 2026 |
| 370 | Henderson Fred J | Okmulgee, OK 74447 | Oil & Gas Operator | Jan 2026 |
| 371 | Hennessey Oil & Gas LLC | Hennessey, OK 73742-0212 | Oil & Gas Operator | Sep 2024 |
| 372 | Heritage Oil Company Inc | Norman, OK 73070 | Oil & Gas Operator | Jul 2008 |
| 373 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Jun 2026 |
| 374 | Hewitt Energy Group Inc | Salt Lake City, UT 84111 | Oil & Gas Operator | Apr 2015 |
| 375 | High Energy | Cushing, OK 74023 | Oil & Gas Operator | Feb 2026 |
| 376 | Highland Minerals Inc | Tulsa, OK 74145-7627 | Oil & Gas Operator | Apr 2015 |
| 377 | Hightower Energy LLC | Cushing, OK 74023-6370 | Oil & Gas Operator | Feb 2026 |
| 378 | Hill Oil Company Inc | Shawnee, OK 74804 | Oil & Gas Operator | Feb 2026 |
| 379 | Hill Resources Inc | | Oil & Gas Operator | Nov 2022 |
| 380 | Himco Oil & Gas Inc | Enid, OK 73702 | Oil & Gas Operator | Feb 2026 |
| 381 | Hinkle Engineering, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2016 |
| 382 | Hinkle Oil And Gas Inc | Oklahoma City, OK 73112-4275 | Oil & Gas Operator | Mar 2026 |
| 383 | Hodgden Operating Co., Inc. | Enid, OK 73702 | Oil & Gas Operator | Mar 2026 |
| 384 | Hodge T F | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2007 |
| 385 | Holden Energy Corporation | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2015 |
| 386 | Holke Dave Consulting Inc | Meridian, ID 83646-4812 | Oil & Gas Operator | Feb 2026 |
| 387 | Hollrah Exploration Company | Edmond, OK 73012 | Oil & Gas Operator | Feb 2026 |
| 388 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2024 |
| 389 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |
| 390 | HRC Production Co | Houston, TX 77024 | Oil & Gas Operator | Mar 2026 |
| 391 | Hulen Operating Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Jun 2026 |
| 392 | Hungerford Oil & Gas Inc | Helena, OK 73741 | Oil & Gas Operator | Nov 2000 |
| 393 | Huntington Energy LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Jun 2026 |
| 394 | Hunton Oil & Gas Corporation | Oklahoma City, OK 73154-0191 | Oil & Gas Operator | May 2019 |
| 395 | Hunton Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2026 |
| 396 | Husky Ventures Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2026 |
| 397 | Hux Oil Company LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Feb 2026 |
| 398 | Hyalite Energy Corporation | Pampa, TX 79066 | Oil & Gas Operator | Feb 2026 |
| 399 | I C Gas Amcana Inc | Tulsa, OK 74103-3713 | Oil & Gas Operator | Apr 1996 |
| 400 | Ike Energy LLC | Stillwater, OK 74074-1745 | Oil & Gas Operator | Feb 2026 |