| 301 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 302 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Apr 2024 |
| 303 | High Sierra Crude Oil& Marketing LLC | Ardmore, OK 73401 | Oil Operator | Nov 2013 |
| 304 | Hill Oil Company Inc | | Oil & Gas Operator | Jan 2024 |
| 305 | Himco Oil & Gas, Inc. | Enid, OK 73702 | Oil & Gas Operator | Jan 2024 |
| 306 | Hinson Bobbie L | Bristow, OK 74010-0899 | Oil & Gas Operator | Dec 2023 |
| 307 | Hinson Jr Bobbie L | Bristow, OK 74010-8420 | Oil & Gas Operator | Jul 2020 |
| 308 | Holloway David A | Okmulgee, OK 74447-9191 | Oil & Gas Operator | Jan 2024 |
| 309 | Holman Kendall | Paden, OK 74860-7116 | Oil & Gas Operator | Jan 2024 |
| 310 | Holman Ray | Okemah, OK 74859-0029 | Gas Operator | Jan 2024 |
| 311 | Holman Robert W | | Oil & Gas Operator | Jan 2019 |
| 312 | Home Petroleum Corp | Victoria, TX 77902 | Oil & Gas Operator | Apr 2024 |
| 313 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |
| 314 | Horizon Resources Inc | Fort Worth, TX 76101-1978 | Oil & Gas Operator | Jul 2006 |
| 315 | Horn Eddie L Dba B & E Investments | | Oil & Gas Operator | Dec 2023 |
| 316 | Horseshoe Oil Co | Cromwell, OK 74837 | Oil & Gas Operator | Dec 2021 |
| 317 | Howco Oil And Gas | Stroud, OK 74079-9604 | Oil & Gas Operator | Mar 2015 |
| 318 | Howell Bill J | Calvin, OK 74531-0248 | Oil & Gas Operator | Sep 2016 |
| 319 | Huck Farms LLC | | Oil & Gas Operator | Feb 2024 |
| 320 | Hull Enterprises Inc | Tulsa, OK 74147-1246 | Oil & Gas Operator | Sep 2023 |
| 321 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 322 | Hunter Petroleum LLC | | Oil Operator | Jan 2024 |
| 323 | Hutton Gas Operating Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 324 | Hy-Carb Energy Inc | | Oil & Gas Operator | Feb 2009 |
| 325 | Hydrocarbon Technology Services | | Oil & Gas Operator | Dec 2000 |
| 326 | Icon Energy Company | Oklahoma City, OK 73156-1613 | Oil & Gas Operator | Jan 2024 |
| 327 | Igleheart Warren | Edmond, OK 73034-8964 | Oil & Gas Operator | Jun 2016 |
| 328 | Indian Nation Energy Company | Wewoka, OK 74884-3456 | Oil & Gas Operator | Apr 2020 |
| 329 | Ingram Exploration Inc | Seminole, OK 74818-1626 | Oil & Gas Operator | Feb 2024 |
| 330 | Inland Oil Corporation | Sapulpa, OK 74067-0943 | Oil & Gas Operator | Jan 2024 |
| 331 | Inland Operating Company | | Oil & Gas Operator | Jan 2024 |
| 332 | Interstate Operating LLC | Tulsa, OK 74101-0535 | Oil & Gas Operator | Aug 2013 |
| 333 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Feb 2024 |
| 334 | J & J Production Company LLC | Okemah, OK 74859-0561 | Oil & Gas Operator | Feb 2024 |
| 335 | J I Staley Co LLC | | Oil & Gas Operator | Jan 2024 |
| 336 | J J B Oil & Gas Inc | Mineral Wells, TX 76068 | Oil & Gas Operator | Nov 1996 |
| 337 | J.D. Pittman Operating LLC | Edmond, OK 73025 | Oil & Gas Operator | Feb 2024 |
| 338 | Jackson Oilfield Service Inc | Purcell, OK 73080-4357 | Oil & Gas Operator | Jan 2021 |
| 339 | Jagger Oil LLC | | Oil & Gas Operator | Jan 2024 |
| 340 | Jake Energy LLC | Prague, OK 74864-6546 | Oil & Gas Operator | Jul 2021 |
| 341 | James Energy Company | Okmulgee, OK 74447-0275 | Oil & Gas Operator | May 2013 |
| 342 | James Oil Company | Compton, CA 90221-4399 | Oil & Gas Operator | Nov 2008 |
| 343 | Jay Petroleum Inc | Oklahoma City, OK 73154-0526 | Oil & Gas Operator | Mar 2019 |
| 344 | JCN Petroleum Corporation | Edmond, OK 73083-3357 | Oil & Gas Operator | Jun 2004 |
| 345 | Jec Operating LLC | Oklahoma City, OK 73114-2717 | Oil & Gas Operator | Jan 2024 |
| 346 | Jericho Exploration | Weleetka, OK 74880-0704 | Oil & Gas Operator | Jan 2024 |
| 347 | Jerry Sanner Oil Properties Inc | Enid, OK 73702-5942 | Oil & Gas Operator | Feb 2024 |
| 348 | Jerry Scott Drilling Company Inc | Ada, OK 74821-2419 | Oil & Gas Operator | Jan 2024 |
| 349 | Jesse'S Oilfield Service | Okemah, OK 74859-0061 | Oil & Gas Operator | Sep 2014 |
| 350 | Jetson Operating Inc | Ada, OK 74821-1526 | Oil & Gas Operator | Jan 2024 |
| 351 | Johnson Exploration Company | Oklahoma City, OK 73102-7008 | Oil & Gas Operator | Jun 2015 |
| 352 | Jordan Oil & Gas Company | Healdsburg, CA 95448-1919 | Oil & Gas Operator | Mar 1995 |
| 353 | K Oil Company | Houston, TX 77005 | Oil & Gas Operator | Apr 2024 |
| 354 | Kahan And Associates, Inc | Tulsa, OK 74170 | Oil & Gas Operator | Jan 2024 |
| 355 | Kahan Louis | Tulsa, OK 74101 | Oil & Gas Operator | May 1994 |
| 356 | Kahn George Operating Co | Seminole, OK 74818 | Oil & Gas Operator | Nov 2000 |
| 357 | Kana Resources, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Aug 2003 |
| 358 | Karbuhn Oil Company | Tomball, TX 77375 | Oil & Gas Operator | Apr 2024 |
| 359 | Kay Production Company Inc | Bowlegs, OK 74830-0115 | Oil & Gas Operator | Jan 2024 |
| 360 | Kellogg Oil Company | Henryetta, OK 74437-1425 | Oil & Gas Operator | Jan 2024 |
| 361 | Kelloil Inc | Fort Worth, TX 76116-5600 | Oil & Gas Operator | Mar 2015 |
| 362 | Kelly Cook Oil LLC | | Oil & Gas Operator | Jan 2024 |
| 363 | Kemmerer Company Inc | Tulsa, OK 74136-7027 | Oil & Gas Operator | Jan 2024 |
| 364 | Ken Snyder Inc | Newalla, OK 74857-7107 | Oil & Gas Operator | Jan 2024 |
| 365 | Kendol Exploration Inc | Oklahoma City, OK 73105-2513 | Oil & Gas Operator | Jan 2024 |
| 366 | Kenworthy Operating Company | Tulsa, OK 74132 | Oil & Gas Operator | May 2009 |
| 367 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Sep 2023 |
| 368 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 369 | Kerr-McGee Refining Corp | Oklahoma City, OK 73125 | Oil & Gas Operator | Jun 2007 |
| 370 | Keystone Gas Corporation | Drumright, OK 7403O | Oil & Gas Operator | Apr 2015 |
| 371 | Klabzuba Royalty Company | Prague, OK 74864-0567 | Oil & Gas Operator | Dec 2019 |
| 372 | Klo LLC | Tulsa, OK 74120-2428 | Oil & Gas Operator | Feb 2024 |
| 373 | Koby Oil Company LLC | Oklahoma City, OK 73101-1945 | Oil & Gas Operator | Jan 2024 |
| 374 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 375 | Kopco, Inc. | Caney, KS 67333 | Oil & Gas Operator | Jan 2024 |
| 376 | Krumme Oil Company LLP | Bristow, OK 74010-0749 | Oil & Gas Operator | Jan 2024 |
| 377 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 378 | Kybenco Disposals LLC | | Oil Operator | Sep 2022 |
| 379 | L E Jones Operating Inc | Duncan, OK 73534 | Oil & Gas Operator | Feb 2024 |
| 380 | Lahoma Production Inc | Jenks, OK 74037-0487 | Oil & Gas Operator | Nov 2023 |
| 381 | Lake Country Disposal II LLC | | Oil Operator | Jan 2024 |
| 382 | Lake Country Disposal LLC | | Oil Operator | Jan 2024 |
| 383 | Lakeshore Operating, LLC | Wichita, KS 67203 | Oil & Gas Operator | Apr 2024 |
| 384 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | Feb 2024 |
| 385 | Landers & Musgrove | Okemah, OK 74859 | Oil & Gas Operator | Mar 2015 |
| 386 | Landers & Musgrove Oil Co. Inc | Okemah, OK 74859-0266 | Oil & Gas Operator | Jan 2018 |
| 387 | Landers & Waldman Inc | Okemah, OK 74859-0660 | Oil & Gas Operator | May 2013 |
| 388 | Landers Oil & Gas Inc | Tulsa, OK 74132-2171 | Oil & Gas Operator | Jan 2024 |
| 389 | Lapetco Inc | Plano, TX 75093 | Oil & Gas Operator | Feb 2024 |
| 390 | Larry Sherman Oil LLC | Chandler, OK 74834-0391 | Oil & Gas Operator | Jan 2024 |
| 391 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 392 | Lawrence James Oil Prop Inc | Catoosa, OK 74015 | Oil & Gas Operator | Feb 2012 |
| 393 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 394 | Le Norman Partners LLC | Duncan, OK 73533-9523 | Oil & Gas Operator | Feb 2012 |
| 395 | Leasehold Management Corp | Oklahoma City, OK 73109-6925 | Oil & Gas Operator | Jan 2024 |
| 396 | Lema Petroleum Inc | Holdenville, OK 74848-0957 | Oil & Gas Operator | Jan 2024 |
| 397 | Likins-Foster Honolulu Corp | Foster City, CA 94404 | Oil & Gas Operator | Feb 2015 |
| 398 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Feb 2024 |
| 399 | Little Chicago Oil & Gas Inc | Edmond, OK 73034-0809 | Oil & Gas Operator | Dec 2017 |
| 400 | Little River Energy Co. | Drumright, OK 74030 | Oil & Gas Operator | Jan 2024 |