| 301 | H.L.S. Energy Co., Inc. | Uvalde, TX 78801 | Oil & Gas Operator | Aug 2003 |
| 302 | H2ox Operating LLC | | Oil Operator | Feb 2024 |
| 303 | Hall Resources Corporation | Independence, MO 64057-2158 | Oil & Gas Operator | Jun 2016 |
| 304 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 305 | Hallmark Resources, Inc | Stilwell, OK 74960-0312 | Oil & Gas Operator | Sep 2020 |
| 306 | Hallum Construction Inc | Seminole, OK 74868-2427 | Oil & Gas Operator | Sep 2014 |
| 307 | Ham Oil Company, LLC | | Oil Operator | Sep 2022 |
| 308 | Hardin Productions | Okemah, OK 74859 | Oil & Gas Operator | Dec 2006 |
| 309 | Harold G Raper Family Trust | Mansfield, TX 76063-1667 | Oil Operator | May 2023 |
| 310 | Harrod Leasing | Arcadia, OK 73007-0043 | Oil & Gas Operator | Jan 2024 |
| 311 | Harvey A B | Seminole, OK 74868-1724 | Oil Operator | Mar 2015 |
| 312 | Headington Energy Corporation | Dallas, TX 75231 | Oil & Gas Operator | Aug 1992 |
| 313 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 314 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 315 | Heartlands Development Co Inc | Bristow, OK 74010-3826 | Oil & Gas Operator | May 2017 |
| 316 | Heaton Everill L | Exeter, CA 93221-2340 | Oil & Gas Operator | Sep 2014 |
| 317 | Hembree Brit W | Shawnee, OK 74804-1725 | Oil & Gas Operator | Jan 2024 |
| 318 | Henry Oil & Gas Inc | Oklahoma City, OK 73127 | Oil & Gas Operator | Jul 2009 |
| 319 | Henry Petroleum Inc | Oklahoma City, OK 73162-1757 | Oil & Gas Operator | Sep 2019 |
| 320 | High Sierra Crude Oil& Marketing LLC | Ardmore, OK 73401 | Oil Operator | Nov 2013 |
| 321 | Highmark Energy Operating, LLC | Poynor, TX 75782 | Oil & Gas Operator | Apr 2024 |
| 322 | Hill Oil Company Inc | | Oil & Gas Operator | Jan 2024 |
| 323 | Hilligoss Leonard | | Oil Operator | Aug 2022 |
| 324 | Hinkle Oil And Gas Inc | Oklahoma City, OK 73112-4275 | Oil & Gas Operator | Feb 2024 |
| 325 | HK Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 326 | Hoard John L Family Trust | Ardmore, OK 73402-1706 | Oil & Gas Operator | Jun 2022 |
| 327 | Hoco Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 328 | Holke Dave Consulting Inc | Meridian, ID 83646-4812 | Oil & Gas Operator | Jan 2024 |
| 329 | Homer Oil Co LLC | Holdenville, OK 74848-0787 | Oil Operator | Feb 2024 |
| 330 | Horizon Resources Inc | Fort Worth, TX 76101-1978 | Oil & Gas Operator | Jul 2006 |
| 331 | Horseshoe Oil Co | Cromwell, OK 74837 | Oil & Gas Operator | Dec 2021 |
| 332 | HRC Production Co | Houston, TX 77002 | Oil & Gas Operator | Jan 2024 |
| 333 | Huck Farms LLC | | Oil & Gas Operator | Feb 2024 |
| 334 | Husky Petroleum | Seminole, OK 74818-1181 | Oil Operator | Feb 2012 |
| 335 | Hy-Carb Energy Inc | | Oil & Gas Operator | Feb 2009 |
| 336 | Icon Energy Company | Oklahoma City, OK 73156-1613 | Oil & Gas Operator | Jan 2024 |
| 337 | Inca Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2009 |
| 338 | Indian Nation Energy Company | Wewoka, OK 74884-3456 | Oil & Gas Operator | Apr 2020 |
| 339 | Ingram Exploration Inc | Seminole, OK 74818-1626 | Oil & Gas Operator | Feb 2024 |
| 340 | Integrated Energy Service Corp | Cleveland, OK 74020 | Oil & Gas Operator | Nov 1998 |
| 341 | Isaacs Fairy J | Konawa, OK 74849-0134 | Oil Operator | Sep 2020 |
| 342 | Isaacs-Chupco LLC | | Oil Operator | Mar 2023 |
| 343 | J & J Production Company LLC | Okemah, OK 74859-0561 | Oil & Gas Operator | Feb 2024 |
| 344 | J & J Tank Truck Services LLC | | Oil Operator | Jan 2024 |
| 345 | J Black Productions LLC | | Oil Operator | Feb 2024 |
| 346 | J J B Oil & Gas Inc | Mineral Wells, TX 76068 | Oil & Gas Operator | Nov 1996 |
| 347 | J O MC Oil & Gas Inc | Maud, OK 74854 | Oil & Gas Operator | Apr 1999 |
| 348 | J&R Operating | Holliday, TX 76366 | Oil & Gas Operator | Apr 2024 |
| 349 | Jackson L B Production Co | Tulsa, OK 74193-0001 | Oil & Gas Operator | Aug 2013 |
| 350 | Jackson Oilfield Service Inc | Purcell, OK 73080-4357 | Oil & Gas Operator | Jan 2021 |
| 351 | Jagger Oil LLC | | Oil & Gas Operator | Jan 2024 |
| 352 | James Petroleum Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2014 |
| 353 | Jan Oil Company | Oklahoma City, OK 73156 | Oil & Gas Operator | May 2006 |
| 354 | January Investments LLC | Norman, OK 73069-8224 | Oil & Gas Operator | Feb 2024 |
| 355 | Jaquess W D "Bud" | Ada, OK 74820 | Oil & Gas Operator | Jan 2018 |
| 356 | Jay Petroleum Inc | Oklahoma City, OK 73154-0526 | Oil & Gas Operator | Mar 2019 |
| 357 | JCTJ Energy LLC | Asher, OK 74826 | Oil & Gas Operator | Jan 2024 |
| 358 | Jeau Mar Limited Inc | Tulsa, OK 74114 | Oil & Gas Operator | Jul 1996 |
| 359 | Jena Operating Company, Inc. | Dallas, TX 75367 | Oil & Gas Operator | May 2007 |
| 360 | Jenkins Charles L | Edmond, OK 73083-3610 | Oil Operator | Jul 1996 |
| 361 | Jenkins Energy Company | Lone Grove, OK 73443-1024 | Oil Operator | Jun 2023 |
| 362 | Jerico Resources LLC | Seminole, OK 74868-6538 | Oil & Gas Operator | Apr 2020 |
| 363 | Jerry Scott Drilling Company Inc | Ada, OK 74821-2419 | Oil & Gas Operator | Jan 2024 |
| 364 | Jesse Operating LLC | Konawa, OK 74849-4917 | Oil Operator | Jan 2024 |
| 365 | Jetson Operating Inc | Ada, OK 74821-1526 | Oil & Gas Operator | Jan 2024 |
| 366 | Jewell Consulting Inc | Bixby, OK 74008 | Oil & Gas Operator | Dec 2022 |
| 367 | Joe B Clifton Exploration Inc | Pauls Valley, OK 73075-1180 | Oil & Gas Operator | Apr 2022 |
| 368 | Johnson Bates Drilling Co Inc | Konawa, OK 74849 | Oil & Gas Operator | Aug 2002 |
| 369 | Johnson Doyle T | Oklahoma City, OK 73118-1007 | Oil & Gas Operator | Jan 2013 |
| 370 | Johnson E Lyle | Oklahoma City, OK 73142 | Oil & Gas Operator | Jan 2024 |
| 371 | Jolen Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2024 |
| 372 | Jordan Oil & Gas Company | Healdsburg, CA 95448-1919 | Oil & Gas Operator | Mar 1995 |
| 373 | Josie Oil & Gas Inc | Seminole, OK 74818-0134 | Oil & Gas Operator | Mar 2015 |
| 374 | Jvo Petroleum Inc | Shawnee, OK 74801 | Oil & Gas Operator | Jul 1995 |
| 375 | K Oil Company | Houston, TX 77005 | Oil & Gas Operator | Apr 2024 |
| 376 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Feb 2024 |
| 377 | Kahan And Associates, Inc | Tulsa, OK 74170 | Oil & Gas Operator | Jan 2024 |
| 378 | Kahan Louis | Tulsa, OK 74101 | Oil & Gas Operator | May 1994 |
| 379 | Kahn George Operating Co | Seminole, OK 74818 | Oil & Gas Operator | Nov 2000 |
| 380 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Apr 2024 |
| 381 | Kato Operating Company | Bristow, OK 74010 | Oil & Gas Operator | Mar 2015 |
| 382 | Katy Drilling Corporation | Tulsa, OK 74146-3717 | Oil & Gas Operator | Apr 2020 |
| 383 | Kay Production Company Inc | Bowlegs, OK 74830-0115 | Oil & Gas Operator | Jan 2024 |
| 384 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2024 |
| 385 | Keener Oil & Gas Company | Tulsa, OK 74119-4416 | Oil & Gas Operator | Feb 2024 |
| 386 | Keener Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2018 |
| 387 | Keith F. Walker Oil & Gas Co., LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2024 |
| 388 | Kelley James C Estate | Norman, OK 73069-7520 | Oil & Gas Operator | Mar 2015 |
| 389 | Kelly Cook Oil LLC | | Oil & Gas Operator | Jan 2024 |
| 390 | Kendol Exploration Inc | Oklahoma City, OK 73105-2513 | Oil & Gas Operator | Jan 2024 |
| 391 | Kenworthy Operating Company | Tulsa, OK 74132 | Oil & Gas Operator | May 2009 |
| 392 | Kepco Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2024 |
| 393 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 394 | Kimco Oil And Gas | Wewoka, OK 74884-0613 | Oil & Gas Operator | Jul 2016 |
| 395 | Klabzuba Royalty Company | Prague, OK 74864-0567 | Oil & Gas Operator | Dec 2019 |
| 396 | Klo LLC | Tulsa, OK 74120-2428 | Oil & Gas Operator | Feb 2024 |
| 397 | Koby Oil Company LLC | Oklahoma City, OK 73101-1945 | Oil & Gas Operator | Jan 2024 |
| 398 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 399 | Kraker Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jan 1995 |
| 400 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |