| 301 | Finston Arthur | Tulsa, OK 74105-7183 | Oil & Gas Operator | Mar 2007 |
| 302 | Flow Production Company | Midland, TX 79708 | Oil & Gas Operator | Mar 2005 |
| 303 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 304 | Foreman Enterprises, Inc. | Edmond, OK 73003 | Oil & Gas Operator | May 2025 |
| 305 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Jul 2025 |
| 306 | Four-O-One Corporation | Edmond, OK 73013-1977 | Oil & Gas Operator | Mar 2015 |
| 307 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 308 | Fpco Oil & Gas Co. | New Orleans, LA 70160 | Oil & Gas Operator | Mar 2025 |
| 309 | Franks Oil & Gas Inc | Cookson, OK 74427-0310 | Oil & Gas Operator | Oct 1998 |
| 310 | Fremont Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2004 |
| 311 | French Jr L R | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 312 | Frisco Energy, L.L.C. | Tulsa, OK 74105 | Oil & Gas Operator | May 2025 |
| 313 | Fugazzi Daniel B | Enid, OK 73703 | Gas Operator | Apr 2025 |
| 314 | Fuksa Investments Inc | Hennessey, OK 73742 | Oil & Gas Operator | May 2025 |
| 315 | Fuller Petroleum Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 316 | Fuller Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 317 | G & C Petroleum Inc | Yale, OK 74085-2502 | Oil & Gas Operator | May 2025 |
| 318 | G A W Oil Company LLC | Enid, OK 73702-3926 | Oil & Gas Operator | May 2025 |
| 319 | Gastar Exploration LLC | Tulsa, OK 74136-1921 | Oil & Gas Operator | Apr 2025 |
| 320 | Gem Oil Company | Albany, TX 76430 | Oil & Gas Operator | Sep 2002 |
| 321 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 322 | Genie Oil & Gas Corporation | Broken Arrow, OK 74013-3783 | Oil & Gas Operator | Mar 2025 |
| 323 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 324 | Geodyne Resources Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 325 | Get Pumping LLC | Drummond, OK 73735 | Oil & Gas Operator | Apr 2025 |
| 326 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 327 | Getty Reserve Oil, Inc. | White Plains, NY 10650 | Oil & Gas Operator | Mar 2005 |
| 328 | Gilliland Oil And Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | May 2025 |
| 329 | GK Production LLC | Perry, OK 73077 | Oil Operator | Jul 2024 |
| 330 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | May 2025 |
| 331 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2025 |
| 332 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Apr 2025 |
| 333 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2025 |
| 334 | Golden Gas Service Company | Tulsa, OK 74114 | Oil & Gas Operator | May 2025 |
| 335 | Gomaco Inc | Tulsa, OK 74103-5061 | Oil & Gas Operator | Apr 2015 |
| 336 | Goodspeed Brenda K | Garber, OK 73738-5401 | Oil & Gas Operator | Nov 1998 |
| 337 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 338 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 339 | Grand Energy, Inc. | Dallas, TX 75248 | Oil & Gas Operator | Oct 2002 |
| 340 | Grand Lake Resources | Hennessey, OK 73742 | Oil & Gas Operator | Apr 2025 |
| 341 | Grand Operating, Inc. | Addison, TX 75001 | Oil & Gas Operator | Dec 2020 |
| 342 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Jul 2025 |
| 343 | Great Plains Pipeline Company | Tulsa, OK 74135-6405 | Oil & Gas Operator | Jul 2014 |
| 344 | Green Operating Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Mar 2025 |
| 345 | Greenhead Energy Operating LLC | Oklahoma City, OK 73131 | Oil & Gas Operator | May 2025 |
| 346 | Greenlee Oil And Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Apr 2025 |
| 347 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2025 |
| 348 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 349 | Grubb F W "Forest" | Garber, OK 73738-0186 | Oil & Gas Operator | Jun 2005 |
| 350 | Guest Petroleum Incorporated | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 351 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 352 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 353 | Gulfstream Petroleum Corp. | | Oil & Gas Operator | Feb 2002 |
| 354 | Gungoll Carl E Estate | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Aug 2000 |
| 355 | Gungoll Henry H. Associates | Enid, OK 73701 | Oil & Gas Operator | Jan 2024 |
| 356 | GW Petroleum Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 1993 |
| 357 | H B Oil & Gas Inc | Oklahoma City, OK 73159 | Oil & Gas Operator | Jun 2000 |
| 358 | H.L.S. Energy Co., Inc. | Uvalde, TX 78801 | Oil & Gas Operator | Aug 2003 |
| 359 | Hadson Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 360 | Halcon Holdings Inc | Ada, OK 74820 | Oil & Gas Operator | Nov 2018 |
| 361 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 362 | Hamilton K M Oil & Gas Co | Ada, OK 74820 | Oil Operator | Jan 2013 |
| 363 | Hammer Oil Properties Inc | Enid, OK 73706-0144 | Oil & Gas Operator | Oct 2017 |
| 364 | Hanna Oil And Gas Company | Fort Smith, AR 72901 | Oil & Gas Operator | Apr 2025 |
| 365 | Harbor Resources LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jul 2025 |
| 366 | Harding & Shelton Inc | Oklahoma City, OK 73104-2410 | Oil & Gas Operator | Apr 2025 |
| 367 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 368 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 369 | Hazelwood Prod & Exp Co LLC | Oklahoma City, OK 73116-9037 | Oil & Gas Operator | Apr 2025 |
| 370 | Hazlewood Oil & Gas Co Inc | Oklahoma City, OK 73139-9353 | Oil & Gas Operator | Apr 2022 |
| 371 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 372 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 373 | Heartland Pumping | Hennessey, OK 73742-7311 | Oil & Gas Operator | Apr 2025 |
| 374 | Helke Exploration Company | Oklahoma City, OK 73112-7201 | Oil & Gas Operator | Feb 2000 |
| 375 | Hennessey Oil & Gas LLC | Hennessey, OK 73742-0212 | Oil & Gas Operator | Sep 2024 |
| 376 | Henry Gungoll Operating Inc | Enid, OK 73703 | Oil & Gas Operator | May 2025 |
| 377 | Henry Oil & Gas Inc | Oklahoma City, OK 73127 | Oil & Gas Operator | Jul 2009 |
| 378 | Heritage Exploration LLC | Oklahoma City, OK 73120-5622 | Oil & Gas Operator | Jan 2020 |
| 379 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2025 |
| 380 | Heston Oil Company | Tulsa, OK 74108 | Oil & Gas Operator | Mar 2005 |
| 381 | Hewitt Energy Group, Inc. | Salt Lake City, UT 84111 | Oil & Gas Operator | Apr 2015 |
| 382 | HHL Development Inc | Garber, OK 73738 | Oil & Gas Operator | Apr 2025 |
| 383 | High Energy | Cushing, OK 74023 | Oil & Gas Operator | Apr 2025 |
| 384 | Himco Oil & Gas, Inc. | Enid, OK 73702 | Oil & Gas Operator | Apr 2025 |
| 385 | Hinkle Engineering, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2016 |
| 386 | Hinkle Oil And Gas Inc | Oklahoma City, OK 73112-4275 | Oil & Gas Operator | May 2025 |
| 387 | Hodgden Operating Co., Inc. | Enid, OK 73702 | Oil & Gas Operator | May 2025 |
| 388 | Hodge T F | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2007 |
| 389 | Hoehn French | Enid, OK 73701-5600 | Oil & Gas Operator | Oct 1996 |
| 390 | Holden Energy Corporation | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2015 |
| 391 | Hondo Oil & Gas Company | Roswell, NM 88202 | Oil & Gas Operator | Aug 2006 |
| 392 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2024 |
| 393 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |
| 394 | Hovas Enterprises | Perkins, OK 74059 | Oil & Gas Operator | Mar 2014 |
| 395 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Jul 2025 |
| 396 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 397 | Huitt Joe A | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 398 | Huitt Joe A Rev Trust | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2009 |
| 399 | Hulen Operating Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Jul 2025 |
| 400 | Hulsey Larry O & Co | Graham, TX 76046 | Oil & Gas Operator | Jun 2012 |