| 301 | Ferguson Oil Company Inc | | Oil & Gas Operator | Apr 1994 |
| 302 | Flint Douglas J | Mounds, OK 74047-5415 | Oil & Gas Operator | Sep 2015 |
| 303 | Flint J A & Associates | Holdenville, OK 74848 | Oil & Gas Operator | Sep 2009 |
| 304 | Flow Production Company | Midland, TX 79708 | Oil & Gas Operator | Mar 2005 |
| 305 | Fluid Disposal Services LLC | | Oil Operator | Aug 2015 |
| 306 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 307 | Ford Energy Corporation | Chickasha, OK 73023-0906 | Oil & Gas Operator | Jan 2024 |
| 308 | Foreman Enterprises, Inc. | Edmond, OK 73003 | Oil & Gas Operator | Feb 2024 |
| 309 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Apr 2024 |
| 310 | Four Seas Exploration LLC | Oklahoma City, OK 73101-1557 | Oil & Gas Operator | Dec 2019 |
| 311 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Dec 2023 |
| 312 | Fpco Oil & Gas Co. | New Orleans, LA 70160 | Oil & Gas Operator | Dec 2023 |
| 313 | Frontier Energy Serv LLC | Enid, OK 73702-1187 | Oil & Gas Operator | Jun 2016 |
| 314 | G & S Production Company | Velma, OK 73491-0036 | Oil & Gas Operator | Oct 2021 |
| 315 | Gaedeke Oil & Gas Operating LLC | Dallas, TX 75219 | Oil & Gas Operator | Apr 2024 |
| 316 | Galaxy Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2015 |
| 317 | Garrison Bros Pipe & Used Equip Inc | El Reno, OK 73036-1026 | Oil & Gas Operator | Aug 2013 |
| 318 | Gas Development Corp. | Broken Arrow, OK 74012 | Oil & Gas Operator | Mar 2015 |
| 319 | Gasanadarko LTD | Oklahoma City, OK 73116 | Gas Operator | May 1994 |
| 320 | Ge Oil & Gas LLC | Hastings, OK 73548-4904 | Oil & Gas Operator | Feb 2024 |
| 321 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 322 | General Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jun 1993 |
| 323 | Geo Engineering Inc | Houston, TX 77027 | Oil & Gas Operator | Jun 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 | Geoex Resources Inc | | Oil & Gas Operator | Jan 1997 |
| 327 | Gilliland Oil And Gas Inc | Hennessey, OK 73742-0305 | Oil & Gas Operator | Feb 2024 |
| 328 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Feb 2024 |
| 329 | Golden Circle Production Co | Seminole, OK 74868 | Oil & Gas Operator | May 2002 |
| 330 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2024 |
| 331 | Gomaco Operating Company | Tulsa, OK 74115-8712 | Oil & Gas Operator | Feb 2024 |
| 332 | Gosnell Tony Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 333 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 334 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 335 | GPM Gas Corporation | Oklahoma City, OK 73102-5627 | Oil & Gas Operator | Jun 2000 |
| 336 | Grace Energy Management Inc | | Oil Operator | Feb 2024 |
| 337 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 338 | Grand Production Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Aug 2000 |
| 339 | Gravley Bill | Duncan, OK 73533 | Oil Operator | Nov 1998 |
| 340 | Green Valley Disposal Serv LLC | Waynoka, OK 73860-0194 | Oil Operator | Feb 2024 |
| 341 | Greenlee Oil And Gas LLC | Oklahoma City, OK 73189-1613 | Oil & Gas Operator | Dec 2023 |
| 342 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2024 |
| 343 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Feb 2024 |
| 344 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2024 |
| 345 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 346 | Gulfport Energy Corporation | Oklahoma City, OK 73134-5003 | Oil & Gas Operator | Feb 2024 |
| 347 | Gulfport Midcon LLC | | Oil & Gas Operator | Feb 2024 |
| 348 | Gypsyglenn Oil Company LLC | | Oil & Gas Operator | Mar 2024 |
| 349 | H & L Operating Company | Amarillo, TX 79114 | Oil & Gas Operator | Feb 2020 |
| 350 | H2ox Operating LLC | | Oil Operator | Feb 2024 |
| 351 | Hadson Petro USA Inc | | Oil & Gas Operator | Nov 2016 |
| 352 | Hadson Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 353 | Hall Energy Company LLC | Oklahoma City, OK 73120-5020 | Oil & Gas Operator | Jul 2022 |
| 354 | Hall Resources Corporation | Independence, MO 64057-2158 | Oil & Gas Operator | Jun 2016 |
| 355 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2023 |
| 356 | Ham Oil Company, LLC | | Oil Operator | Sep 2022 |
| 357 | Hamil Oil & Gas LLC | | Oil & Gas Operator | Jan 2024 |
| 358 | Hamilton Brothers Oil Co. | Houston, TX 77057 | Oil & Gas Operator | Mar 2015 |
| 359 | Harbor Resources LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Apr 2024 |
| 360 | Harding & Shelton Inc | Oklahoma City, OK 73104-2410 | Oil & Gas Operator | Jan 2024 |
| 361 | Harding And Shelton Exploration LLC | | Oil & Gas Operator | Jan 2024 |
| 362 | Haydens Oil And Gas LLC | | Oil & Gas Operator | Jan 2024 |
| 363 | Hays Production LLC | Velma, OK 73491-0051 | Oil & Gas Operator | Feb 2024 |
| 364 | Hazlewood Oil & Gas Co Inc | Oklahoma City, OK 73139-9353 | Oil & Gas Operator | Apr 2022 |
| 365 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 366 | Heartlands Development Co Inc | Bristow, OK 74010-3826 | Oil & Gas Operator | May 2017 |
| 367 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2024 |
| 368 | Hep Oil Company LTD | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 369 | Hep Oil GP, LLC | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 370 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 371 | Hiawatha Exploration Company | Oklahoma City, OK 73116-7326 | Oil & Gas Operator | Mar 2009 |
| 372 | High Sierra Crude Oil& Marketing LLC | Ardmore, OK 73401 | Oil Operator | Nov 2013 |
| 373 | High Sierra Water Services Mid Continent LLC | Denver, CO 80209 | Oil Operator | Feb 2010 |
| 374 | Highland Minerals, Inc. | Tulsa, OK 74145-7627 | Oil & Gas Operator | Apr 2015 |
| 375 | Highland Oil & Gas LLC | Houston, TX 77079-7220 | Oil & Gas Operator | Feb 2015 |
| 376 | Hinkle Engineering, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2016 |
| 377 | Hinkle Oil And Gas Inc | Oklahoma City, OK 73112-4275 | Oil & Gas Operator | Feb 2024 |
| 378 | HK Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 379 | Hodgden Operating Co., Inc. | Enid, OK 73702 | Oil & Gas Operator | Feb 2024 |
| 380 | Holke Dave Consulting Inc | Meridian, ID 83646-4812 | Oil & Gas Operator | Jan 2024 |
| 381 | Home-Stake Royalty Corp., The | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2014 |
| 382 | Hondo Oil & Gas Company | Roswell, NM 88202 | Oil & Gas Operator | Aug 2006 |
| 383 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Jan 2024 |
| 384 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |
| 385 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 386 | Hunt Engineering Inc | Norman, OK 73069-4093 | Oil & Gas Operator | Feb 2019 |
| 387 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 388 | Huntington Energy LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2024 |
| 389 | Hunton Oil & Gas Corporation | Oklahoma City, OK 73154-0191 | Oil & Gas Operator | May 2019 |
| 390 | Hux Oil Company LLC | Kingfisher, OK 73750-0474 | Oil & Gas Operator | Jan 2024 |
| 391 | Hy-Carb Energy Inc | | Oil & Gas Operator | Feb 2009 |
| 392 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2024 |
| 393 | Indian Wells Oil Co | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2000 |
| 394 | Iron Sights Operating Inc | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2022 |
| 395 | Itero Energy LLC | Verden, OK 73092 | Oil Operator | Dec 2011 |
| 396 | J C Petroleum Inc | Chickasha, OK 73023-1433 | Oil & Gas Operator | Dec 2013 |
| 397 | January Investments LLC | Norman, OK 73069-8224 | Oil & Gas Operator | Feb 2024 |
| 398 | Jay Petroleum Inc | Oklahoma City, OK 73154-0526 | Oil & Gas Operator | Mar 2019 |
| 399 | JCN Petroleum Corporation | Edmond, OK 73083-3357 | Oil & Gas Operator | Jun 2004 |
| 400 | Jec Operating LLC | Oklahoma City, OK 73114-2717 | Oil & Gas Operator | Jan 2024 |