| 301 | Jet Oil Co12/Ofb See 18649 | | Oil & Gas Operator | Jul 2007 |
| 302 | JFD,Inc | Houston, TX 77041-6914 | Oil & Gas Operator | Feb 2000 |
| 303 | Jim Clower Inc | Beaver, OK 73932-0110 | Oil & Gas Operator | Jan 2024 |
| 304 | Jma Energy Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2024 |
| 305 | Jma Resources, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Jan 2024 |
| 306 | Jo-Allyn Oil Co Inc | Laverne, OK 73848 | Oil & Gas Operator | Feb 2024 |
| 307 | Johnson Exploration Company | Oklahoma City, OK 73102-7008 | Oil & Gas Operator | Jun 2015 |
| 308 | Jolen Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2024 |
| 309 | Jones & Pellow Oil Co | Oklahoma City, OK 73118-1115 | Oil & Gas Operator | Feb 2015 |
| 310 | Jones Energy LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jan 2024 |
| 311 | K M Gas Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2014 |
| 312 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Feb 2024 |
| 313 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | May 2024 |
| 314 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2024 |
| 315 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 316 | KCS Resources, LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2017 |
| 317 | Keener Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2018 |
| 318 | Kennedy & Mitchell, Inc. | Houston, TX 77084 | Oil & Gas Operator | Aug 2013 |
| 319 | Kenneth W. Cory, LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Feb 2024 |
| 320 | Kenworthy Operating Company | Tulsa, OK 74132 | Oil & Gas Operator | May 2009 |
| 321 | Kepco Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2024 |
| 322 | Kepco. Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 323 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 324 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Sep 2023 |
| 325 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 326 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | May 2024 |
| 327 | Kimball Production Co. | Houston, TX 77042 | Oil & Gas Operator | Jul 2002 |
| 328 | Kiowa Gas Company | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 329 | Kirkpatrick Oil Company | Oklahoma City, OK 73116 | Oil & Gas Operator | May 2024 |
| 330 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 331 | KT Energy Inc | Enid, OK 73702-2365 | Oil & Gas Operator | Jan 2024 |
| 332 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 333 | Kybenco Disposals LLC | | Oil Operator | Sep 2022 |
| 334 | L & L Smith Energy Corporation | | Oil & Gas Operator | Jan 2023 |
| 335 | Lake Country Disposal II LLC | | Oil Operator | Jan 2024 |
| 336 | Lake Country Disposal LLC | | Oil Operator | Jan 2024 |
| 337 | Lamb Alan L | Oklahoma City, OK 73120-7824 | Oil & Gas Operator | Feb 2020 |
| 338 | Landmark Exploration Co | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2013 |
| 339 | Lariat Petroleum Inc | Tulsa, OK 74119 | Oil & Gas Operator | Sep 2023 |
| 340 | Larkspur Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 341 | Latigo Oil And Gas Inc | Woodward, OK 73802-1208 | Oil & Gas Operator | Feb 2024 |
| 342 | LCB Resources LLC | | Oil & Gas Operator | Feb 2024 |
| 343 | Lear Petroleum Corp | Houston, TX 77210 | Oil & Gas Operator | Mar 2015 |
| 344 | Lewis A Hembree Production Co | Shawnee, OK 74802-1725 | Oil & Gas Operator | Jan 2024 |
| 345 | Liberty Operating Inc | Norman, OK 73069-8225 | Oil & Gas Operator | Mar 2022 |
| 346 | Likins-Foster Honolulu Corp | Foster City, CA 94404 | Oil & Gas Operator | Feb 2015 |
| 347 | Lime Rock Resources A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2024 |
| 348 | Lime Rock Resources II-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2024 |
| 349 | Litzenberger Exploration | Waynoka, OK 73860 | Oil & Gas Operator | Jul 1996 |
| 350 | Litzenberger Exploration Inc | Waynoka, OK 73860-0217 | Oil & Gas Operator | Feb 2024 |
| 351 | Lobo Exploration Company | Yukon, OK 73099 | Oil & Gas Operator | Jan 2024 |
| 352 | Locin Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 353 | Lowry Exploration Inc | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2024 |
| 354 | LX4 LLC | | Oil Operator | Jan 2024 |
| 355 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2024 |
| 356 | M & M Exploration, Inc. | Westminster, CO 80031 | Oil & Gas Operator | Feb 2024 |
| 357 | M3V Energy, LLC | Perryton, TX 79070 | Oil & Gas Operator | May 2024 |
| 358 | Mac Laskey Kelly Oilfield | El Dorado, KS 67042 | Oil & Gas Operator | Feb 2024 |
| 359 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | Feb 2024 |
| 360 | Malson Oil Company | Crawford, OK 73638 | Oil & Gas Operator | Dec 2016 |
| 361 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Jan 2024 |
| 362 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Mar 2024 |
| 363 | Marjo Operating Mid-Continent LLC | | Oil & Gas Operator | Feb 2024 |
| 364 | Marlin Oil Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Jan 2024 |
| 365 | Marmik Oil Company | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2015 |
| 366 | Marshall Oil Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2017 |
| 367 | Martin'S Resources LLC | | Oil & Gas Operator | Jan 2024 |
| 368 | Matador E & P Company Inc | | Oil & Gas Operator | May 2020 |
| 369 | May Petroleum, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Nov 1998 |
| 370 | MBR Resources, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | May 2024 |
| 371 | McGee, Tom Corporation | Booker, TX 79005 | Oil & Gas Operator | Jan 2024 |
| 372 | McNic Oil & Gas Midcontinent | Oklahoma City, OK 73154-0526 | Oil & Gas Operator | Jan 2024 |
| 373 | McQueen Ed & Company Inc | Lindsey, OK 73052 | Oil & Gas Operator | Apr 2014 |
| 374 | Meadowbrook Oil Corporation Of Ok Inc | Del City, OK 73115-3608 | Oil & Gas Operator | Feb 2024 |
| 375 | Medallion Petroleum, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2015 |
| 376 | Mendell Petroleum Corporation | Castle Rock, CO 80104-9045 | Oil & Gas Operator | Sep 2004 |
| 377 | Mercury Production Company | Fort Worth, TX 76113 | Gas Operator | Aug 2012 |
| 378 | Meridian Oil Production Inc. | Houston, TX 77210 | Oil & Gas Operator | Oct 2022 |
| 379 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | May 2024 |
| 380 | Mesa Operating LP | Irving, TX 75039-3746 | Oil & Gas Operator | Oct 2010 |
| 381 | Metropolitan Resources Corp | Tulsa, OK 74169-1734 | Oil & Gas Operator | Mar 2015 |
| 382 | Mewbourne Marketing Inc | Tyler, TX 75711 | Oil & Gas Operator | Mar 2013 |
| 383 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | May 2024 |
| 384 | MFP Petroleum LP | Oklahoma City, OK 73142-3017 | Gas Operator | Dec 2023 |
| 385 | Mge Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jan 2024 |
| 386 | Mid-Con Central Expl Co | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2014 |
| 387 | Midgard Energy Company | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2014 |
| 388 | Midwestern Exploration Co. | Edmond, OK 73013 | Oil & Gas Operator | Jan 2024 |
| 389 | Mija LLC | | Oil & Gas Operator | Feb 2024 |
| 390 | Miller Oil & Gas Co | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 2017 |
| 391 | Mobil Exp & Prod Us Inc | Houston, TX 77060-1991 | Oil & Gas Operator | May 2001 |
| 392 | Monexco | Edmond, OK 73034-3776 | Oil & Gas Operator | Mar 2008 |
| 393 | Monterey Production Company LLC | | Oil & Gas Operator | Feb 2024 |
| 394 | Moore & Moore Energy Inc | Purcell, OK 73080-0674 | Oil & Gas Operator | Dec 2012 |
| 395 | Moore Richard L | Morris, OK 74445 | Oil Operator | Aug 2013 |
| 396 | Moss Ted A Operating Company | Oklahoma City, OK 73126-0187 | Oil & Gas Operator | Jun 1997 |
| 397 | Mott Energy LLC | Riverview, FL 33569-6702 | Oil & Gas Operator | Jan 2024 |
| 398 | Mud Operations Inc | Ames, OK 73718-9501 | Oil & Gas Operator | Feb 2024 |
| 399 | Muras Energy, Inc. | Edmond, OK 73013 | Oil & Gas Operator | Jan 2024 |
| 400 | Mustang Fuel Corp. Of Oklahoma | Oklahoma City, OK 73106 | Oil & Gas Operator | Nov 2016 |