| 301 | Miller Exploration Company | Tulsa, OK 74136-1020 | Oil & Gas Operator | Mar 2015 |
| 302 | Miner Rick | Drumright, OK 74030-0373 | Oil & Gas Operator | Feb 2024 |
| 303 | Miner Rick Oil Inc | Drumright, OK 74030-0373 | Oil & Gas Operator | Apr 2022 |
| 304 | Minor Jr W T | Wichita Falls, TX 76307 | Oil Operator | Nov 1998 |
| 305 | Monarch Petroleum Corporation | FT Worth, TX 76102 | Oil & Gas Operator | Dec 2019 |
| 306 | Monty L Hott Production Corporation | Oklahoma City, OK 73142 | Oil & Gas Operator | Jan 2024 |
| 307 | Moore Petroleum Invest Corp | Norman, OK 73072-4217 | Oil & Gas Operator | Jan 2024 |
| 308 | Moore Richard L | Morris, OK 74445 | Oil Operator | Aug 2013 |
| 309 | Morris Roger Dan | Cushing, OK 74023-1145 | Oil & Gas Operator | Feb 2024 |
| 310 | MT Dora Energy Corporation | Duncan, OK 73533-1829 | Oil & Gas Operator | Apr 2014 |
| 311 | MT Dora Energy LLC | Houston, OK 77056-1940 | Oil & Gas Operator | Jun 2019 |
| 312 | Mud Operations Inc | Ames, OK 73718-9501 | Oil & Gas Operator | Feb 2024 |
| 313 | Mueggenborg Derrick R Dba DRM Oil & Gas | Yale, OK 74085-0335 | Oil Operator | Feb 2024 |
| 314 | Musgrove Energy Inc | Ponca City, OK 74602 | Oil & Gas Operator | Dec 2023 |
| 315 | Musgrove, Casey Oil | Ponca City, OK 74602-0391 | Oil & Gas Operator | Jun 2017 |
| 316 | Naifco Oil & Gas LLC | Oklahoma City, OK 73107-0467 | Oil & Gas Operator | Jan 2024 |
| 317 | Naro Oil Corporation | Dallas, TX 75230-1986 | Oil & Gas Operator | Nov 2003 |
| 318 | National Oil Company | Garden City, KS 67846 | Oil & Gas Operator | Jan 2024 |
| 319 | Natural Gas Compression Corp | Cleveland, OK 74020-0065 | Oil & Gas Operator | Nov 2023 |
| 320 | Nbi Services, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | May 2024 |
| 321 | Nelson Exploration Corporation | | Oil & Gas Operator | Jan 2024 |
| 322 | Nemaha Environmental Services LLC | Enid, OK 73703 | Oil Operator | Feb 2024 |
| 323 | New Dominion LLC | Tulsa, OK 74119-3220 | Oil & Gas Operator | Jan 2024 |
| 324 | New Energy Corporation | Rancho Santa Fe, CA 92067-1990 | Oil & Gas Operator | Jan 2024 |
| 325 | New Gulf Resources, LLC | Tulsa, OK 74133 | Oil & Gas Operator | May 2018 |
| 326 | Nexus Resources Corporation | Drumright, OK 74030 | Oil & Gas Operator | Jan 2013 |
| 327 | Noble Resources Inc | Mannford, OK 74044-0570 | Oil & Gas Operator | Feb 2024 |
| 328 | Noco Investment Company Inc | Tulsa, OK 74159-0470 | Oil & Gas Operator | Mar 2005 |
| 329 | Nogp Operating Company LLC | | Oil & Gas Operator | Jan 2024 |
| 330 | Northwest Disposal Corporation | Laverne, OK 73848-0504 | Oil & Gas Operator | Jul 2014 |
| 331 | Nub'S Well Servicing Inc | Fox, OK 73435-0206 | Oil & Gas Operator | Feb 2024 |
| 332 | NWM Properties LLC | Tulsa, OK 74131-4426 | Oil Operator | Feb 2024 |
| 333 | Octagon Resources LLC | Norman, OK 73071-1295 | Oil & Gas Operator | May 2015 |
| 334 | Oil & Gas Exploration Inc | Cleveland, OK 74020 | Oil & Gas Operator | Aug 2013 |
| 335 | Oil State Petroleum Inc | Jennings, OK 74038 | Oil & Gas Operator | Jan 2024 |
| 336 | Oilfield Operating Company | Cushing, OK 74023-1347 | Oil & Gas Operator | Jan 2018 |
| 337 | Oilton Petroleum Inc | Oilton, OK 74052-0459 | Oil & Gas Operator | Oct 2001 |
| 338 | Okie Crude Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 339 | Oklahoma Cellulose Inc | Cleveland, OK 74020-0193 | Oil Operator | Jan 2024 |
| 340 | Oklahoma Liquid Resources Inc | Owasso, OK 74055-0841 | Oil & Gas Operator | Jan 2024 |
| 341 | Oklahoma Oil & Gas MGMT Inc | | Oil & Gas Operator | Jan 2024 |
| 342 | Oklahoma Petroleum Allies LLC | Ardmore, OK 73401 | Oil Operator | Oct 2023 |
| 343 | Okt Petroleum Company Inc | Oklahoma City, OK 73118-7425 | Oil & Gas Operator | Oct 2013 |
| 344 | Osage Oil & Transportation Inc | Cleveland, OK 74020 | Oil & Gas Operator | Nov 2000 |
| 345 | Osburn Gerald Dba Ozzy & Son Oil & Gas | Drumright, OK 74030-5467 | Oil Operator | Oct 2020 |
| 346 | Osterhout Phillip L | Drumright, OK 74030-0693 | Oil & Gas Operator | Jan 2014 |
| 347 | Oxford Oil Inc | Cleveland, OK 74020 | Oil & Gas Operator | Feb 1997 |
| 348 | Pablo Energy II, LLC | Amarillo, TX 79105 | Oil & Gas Operator | May 2024 |
| 349 | Pace Exploration LLC | Tulsa, OK 74170-1923 | Oil & Gas Operator | Dec 2023 |
| 350 | Pan Western Energy Corporation | Tulsa, OK 74114 | Oil & Gas Operator | May 2024 |
| 351 | Paradigm Twenty LLC | | Oil & Gas Operator | Jan 2024 |
| 352 | Paramount Petroleum Corp | Dallas, TX 75374 | Oil Operator | Dec 2000 |
| 353 | Parker & Parsley Dev Co | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 354 | Parwest Land Exploration, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Jan 2024 |
| 355 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 356 | Patina Oklahoma Corp | Duncan, OK 73533-9523 | Oil & Gas Operator | Nov 2014 |
| 357 | Patriot Petroleum Co LLC | Coppell, TX 75019-4216 | Oil & Gas Operator | Jan 2013 |
| 358 | Pawnee Petroleum Company | Seminole, OK 74868-0951 | Oil & Gas Operator | Feb 2023 |
| 359 | Payneco Pipeline Company | Yale, OK 74085 | Oil & Gas Operator | Dec 2000 |
| 360 | Paystone Oil Corporation | Tulsa, OK 74105 | Oil Operator | Mar 2009 |
| 361 | PBT Enterprises Inc | Garber, OK 73738-0262 | Oil & Gas Operator | May 2023 |
| 362 | Pease George W Jr | Fairfax, OK 74637 | Oil & Gas Operator | Mar 1998 |
| 363 | Pelto Oil Co | Houston, TX 77002 | Oil & Gas Operator | Nov 1998 |
| 364 | Penn Production Company Inc | | Oil & Gas Operator | Nov 2014 |
| 365 | Perkins Energy Company | Duncan, OK 73533-3853 | Oil & Gas Operator | Feb 2024 |
| 366 | Petro Warrior LLC | Wichita, KS 67201-3399 | Oil & Gas Operator | Feb 2024 |
| 367 | Petroleum Resources Co | Wichita, KS 67206 | Oil & Gas Operator | May 2000 |
| 368 | Petron Energy Inc | Dallas, TX 75252 | Oil & Gas Operator | May 2024 |
| 369 | Petroquest Energy, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | May 2024 |
| 370 | Phillips Oil Operating Co | Enid, OK 73703-4921 | Oil & Gas Operator | May 2019 |
| 371 | Phillips, Warren P | | Oil & Gas Operator | Apr 2011 |
| 372 | Pinnacle Corporation (The) | Broken Arrow, OK 74012 | Oil & Gas Operator | Nov 2014 |
| 373 | Pinnacle Operating Company LLC | Tulsa, OK 74137-4248 | Oil & Gas Operator | Jan 2024 |
| 374 | Pitco Production Company | Tulsa, OK 74170-2320 | Oil & Gas Operator | May 2013 |
| 375 | Plains Liquids Transport Inc | Houston, TX 77002 | Oil & Gas Operator | May 1996 |
| 376 | Plains Marketing & Trans Inc | Houston, TX 76002 | Oil & Gas Operator | Oct 1998 |
| 377 | Plumb Resources, Inc. | Houston, TX 77096 | Oil & Gas Operator | Jun 1998 |
| 378 | Pogue Randall | Ada, OK 74821-1547 | Oil & Gas Operator | Apr 2014 |
| 379 | Polaris Petroleum Operations LLC | Branson West, MO 65737 | Oil & Gas Operator | May 2019 |
| 380 | Pollard Jr G W | Okmulgee, OK 74447 | Oil & Gas Operator | Apr 2015 |
| 381 | Post Oak Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Jul 2013 |
| 382 | Powell James S | | Oil Operator | Jan 2024 |
| 383 | Premier Gas Company LLC | | Oil Operator | Jan 2024 |
| 384 | Presley Petroleum Company | Newport Beach, CA 92658-2200 | Oil & Gas Operator | Oct 1999 |
| 385 | Pri Producing Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2006 |
| 386 | Producers Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2007 |
| 387 | Proven Reserves Management, Inc. | Dallas, TX 75370 | Oil & Gas Operator | Jan 2024 |
| 388 | Pulliam Dennis L | Mannford, OK 74044-9733 | Oil & Gas Operator | Nov 2001 |
| 389 | Pulliam Melvin | Mannford, OK 74044 | Oil & Gas Operator | Jul 2019 |
| 390 | R & D Oil & Gas | Exeter, CA 93221-9697 | Oil & Gas Operator | Aug 2019 |
| 391 | R & N Oil Company | Fairfax, OK 74637 | Oil & Gas Operator | May 2013 |
| 392 | R C Taylor Operating Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2024 |
| 393 | R D T Properties | Tulsa, OK 74105-7122 | Oil & Gas Operator | Sep 2017 |
| 394 | R K R Exploration | Seminole, OK 74868-9754 | Oil & Gas Operator | Mar 2015 |
| 395 | R.E.J.A.S. Energy LLC | | Oil & Gas Operator | Jan 2024 |
| 396 | Ramco Oil Company | Pawhuska, OK 74056 | Oil & Gas Operator | Feb 2012 |
| 397 | Ramsey Property Management LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Jan 2024 |
| 398 | Raper Brice Oil Company LLC | Yale, OK 74085-6865 | Oil & Gas Operator | Apr 2015 |
| 399 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2024 |
| 400 | Red Fork (USA) Investments Inc | Midland, TX 79710-0272 | Oil & Gas Operator | May 2019 |