| 4301 | Osburn Gerald Dba Ozzy & Son Oil & Gas | Drumright, OK 74030-5467 | Oil Operator | Oct 2020 |
| 4302 | Oscar'S Well Service Inc | Okemah, OK 74859 | Oil & Gas Operator | Apr 1998 |
| 4303 | Oshtah Oil Company LLC | Stratford, OK 74872 | Oil & Gas Operator | Sep 2018 |
| 4304 | Oso Resources LLC | Edmond, OK 73003 | Oil & Gas Operator | Dec 2025 |
| 4305 | Osterhout Phillip L | Drumright, OK 74030-0693 | Oil & Gas Operator | Jan 2014 |
| 4306 | Oswego Arbuckle Enterprise Inc | S Coffeyville, OK 74072-9702 | Oil & Gas Operator | Mar 2015 |
| 4307 | Otc Investors Inc | | Oil Operator | Jun 2025 |
| 4308 | Otc Petroleum Corporation | Nichols Hill, OK 73116 | Oil & Gas Operator | Mar 2015 |
| 4309 | Otc/Occ Not Assigned | | Oil & Gas Operator | Dec 2024 |
| 4310 | Ouachita Exploration Inc | Chickasha, OK 73018 | Oil & Gas Operator | Dec 2025 |
| 4311 | Outback Petroleum Inc | Moore, OK 73160-9998 | Oil & Gas Operator | Mar 2015 |
| 4312 | Outlaw Oil And Gas LLC | Kaw City, OK 74641 | Oil & Gas Operator | Dec 2025 |
| 4313 | Ovation Energy II, LP | Houston, TX 77279 | Oil & Gas Operator | Jun 2011 |
| 4314 | Ovation Energy, LP | N Richlnd HLS, TX 76180 | Oil & Gas Operator | Sep 2004 |
| 4315 | Overflow Energy Stack LLC | Booker, TX 79005 | Oil Operator | Sep 2022 |
| 4316 | Overflow Energy, LLC | Perryton, TX 79070 | Oil & Gas Operator | Mar 2026 |
| 4317 | Overland Investments Inc | Coweta, OK 74429 | Oil & Gas Operator | Dec 2025 |
| 4318 | Ovintiv Mid-Continent Inc. | The Woodlands, TX 77380-2764 | Oil & Gas Operator | Dec 2025 |
| 4319 | Ovintiv USA Inc. | Denver, CO 80202 | Oil & Gas Operator | Mar 2026 |
| 4320 | Owens James W | Tulsa, OK 74114-1425 | Oil & Gas Operator | Oct 2022 |
| 4321 | Owl Creek Production Co., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2006 |
| 4322 | Oxco, LLC | | Oil & Gas Operator | Feb 2015 |
| 4323 | Oxford Exploration Company | Denver, CO 80237 | Oil & Gas Operator | Aug 1995 |
| 4324 | Oxford Oil Inc | Cleveland, OK 74020 | Oil & Gas Operator | Feb 1997 |
| 4325 | Oxley Energy LLC | Houston, TX 77042 | Gas Operator | Dec 2025 |
| 4326 | Oxley John C | Tulsa, OK 74103 | Oil & Gas Operator | Sep 1996 |
| 4327 | Oxley Petroleum | Tulsa, OK 74119-3609 | Oil & Gas Operator | Jan 2020 |
| 4328 | Oxley Petroleum Company | Oklahoma City, OK 73118-1044 | Oil & Gas Operator | Sep 2017 |
| 4329 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Mar 2026 |
| 4330 | Ozark Oil Corporation | Springfield, MO 65804 | Oil & Gas Operator | Oct 1992 |
| 4331 | P & C Oil Company | Leona, TX 75850 | Oil & Gas Operator | Dec 2025 |
| 4332 | P & H Construction Inc | Wewoka, OK 74884 | Oil & Gas Operator | Jun 2024 |
| 4333 | P & H Oil & Gas Inc | Stroud, OK 74079 | Oil & Gas Operator | Jan 2026 |
| 4334 | P & M Drilling Company Inc | Depew, OK 74028 | Oil & Gas Operator | Dec 2004 |
| 4335 | P & M Petroleum Management | Denver, CO BAD ADDR | Oil & Gas Operator | Apr 2010 |
| 4336 | P & P Producing Inc | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 4337 | P A Energy Inc | Calvin, OK 74531-0248 | Oil & Gas Operator | Apr 2020 |
| 4338 | P F Beeler LLC | Norman, OK 73072-7522 | Oil & Gas Operator | Dec 2025 |
| 4339 | P K & L Oil Properties | Shawnee, OK 74802-0931 | Oil & Gas Operator | Mar 2001 |
| 4340 | P O & G Panhandle LP | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 4341 | P T Oil Co Inc | Walters, OK 73572-9505 | Oil Operator | Nov 2014 |
| 4342 | P-2 Exploraton Co Inc | Pampa, TX 79065-2920 | Oil & Gas Operator | Jun 1996 |
| 4343 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2026 |
| 4344 | Pablo Energy II, LLC | Amarillo, TX 79105 | Oil & Gas Operator | Jan 2026 |
| 4345 | Pace Exploration LLC | Tulsa, OK 74133 | Oil & Gas Operator | Nov 2025 |
| 4346 | Pace Petroleum Company | Dallas, TX 75206 | Oil & Gas Operator | Mar 2026 |
| 4347 | Pacific Enterprise Oil Co USA | Los Angeles, CA 90071-2005 | Oil & Gas Operator | Aug 2012 |
| 4348 | Pacific Enterprises Royalty Co | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2002 |
| 4349 | Pactola Development Co | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2004 |
| 4350 | Page Petroleum Inc | Calgary, AB T2P3M-3000 | Oil & Gas Operator | Nov 1998 |
| 4351 | Painter & McPhail | Bartlesville, OK 74006 | Oil Operator | Sep 1996 |
| 4352 | Pak Energy LLC | Calgary, AB T3A-5E8 | Oil Operator | Sep 2022 |
| 4353 | Pal Energy LLC | Guymon, OK 73942-1950 | Gas Operator | Aug 2009 |
| 4354 | Pal Kids Inc | Coronado, CA 92118 | Oil & Gas Operator | Nov 2000 |
| 4355 | Palace Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2007 |
| 4356 | Paleo, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2026 |
| 4357 | Palisades Asset Holding Co LLC | Dallas, TX 75201 | Oil & Gas Operator | Aug 2017 |
| 4358 | Palm Oil & Gas Company | Sedona, AZ 86340 | Oil & Gas Operator | Jan 2026 |
| 4359 | Palm Operating LLC | Oklahoma City, OK 73106-5646 | Oil & Gas Operator | Nov 2019 |
| 4360 | Paloma Operating Co Inc | Houston, TX 77002-5220 | Oil & Gas Operator | Dec 2025 |
| 4361 | Paloma Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2018 |
| 4362 | Palomino Petroleum Inc | Newton, KS 67114 | Oil & Gas Operator | Sep 2025 |
| 4363 | Paluca Petroleum Inc | Holdenville, OK 74848 | Oil & Gas Operator | Dec 2025 |
| 4364 | Pan Petroleum MLP | Kansas City, MO 64114 | Oil & Gas Operator | Aug 1997 |
| 4365 | Pan Texas Petroleum Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2003 |
| 4366 | Pan Western Energy Corporation | Tulsa, OK 74114 | Oil & Gas Operator | Mar 2026 |
| 4367 | Panada Exploration, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Jun 1996 |
| 4368 | Panadero Oil Company | Dallas, TX 75206 | Oil & Gas Operator | Apr 2002 |
| 4369 | Panenergy Services Inc | Houston, TX 77525 | Oil & Gas Operator | May 2001 |
| 4370 | Panexco Operating LLC | Oklahoma City, OK 73103-2203 | Oil & Gas Operator | Oct 2014 |
| 4371 | Pangaea Exploration Corp | Edmond, OK 73013 | Oil & Gas Operator | May 2019 |
| 4372 | Panhandle Eastern Pipeline Company LP | Houston, TX 77002-6803 | Oil & Gas Operator | Oct 1999 |
| 4373 | Panhandle Oil & Gas Consultants Inc | Woodward, OK 73802-5011 | Oil & Gas Operator | Jul 2015 |
| 4374 | Panhandle Oil & Gas Inc | Oklahoma City, OK 73112-5688 | Oil & Gas Operator | May 2007 |
| 4375 | Panhandle Oilfield Service Companies Inc | Liberal, KS 67905-1256 | Oil Operator | Sep 2000 |
| 4376 | Panoak Oil & Gas Corporation | Tulsa, OK 74137 | Oil & Gas Operator | Aug 2018 |
| 4377 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Mar 2026 |
| 4378 | Panther Energy Company, LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2022 |
| 4379 | Panther Operating LLC | Pauls Valley, OK 73075 | Oil & Gas Operator | Dec 2025 |
| 4380 | Pap Oil Company Inc | Cement, OK 73017-0240 | Oil & Gas Operator | Nov 1998 |
| 4381 | Papal Enterprises Inc | Oklahoma City, OK 73154-1555 | Oil & Gas Operator | Apr 2015 |
| 4382 | Pappe Court Jr | Kingfisher, OK 73750-0688 | Oil & Gas Operator | Nov 2001 |
| 4383 | Par Oil Company Inc | Denver, CO 80201 | Oil & Gas Operator | Jun 2003 |
| 4384 | Para Pro Corporation | Sedona, AZ 86336-5745 | Oil & Gas Operator | Jan 2005 |
| 4385 | Paradigm Petroleum Corporation | Abilene, TX 79605 | Oil & Gas Operator | Mar 2026 |
| 4386 | Paradigm Twenty LLC | Stillwater, OK 74074-1745 | Oil & Gas Operator | Dec 2025 |
| 4387 | Paradox Petroleum Company | Amarillo, TX 79114-7587 | Oil & Gas Operator | Dec 1998 |
| 4388 | Paragon Industries Inc | Sapulpa, OK 74066-6987 | Oil Operator | Dec 2025 |
| 4389 | Paragon Production Company | Edmond, OK 73013-5051 | Oil & Gas Operator | Feb 2021 |
| 4390 | Paramore Oil Company | Duncan, OK 73533 | Oil & Gas Operator | Apr 2022 |
| 4391 | Paramount Petroleum Corp | Dallas, TX 75374 | Oil Operator | Dec 2000 |
| 4392 | Pardee Production Co. | Skiatook, OK 74070 | Oil & Gas Operator | Mar 2021 |
| 4393 | Parham Edith | Beggs, OK 74421-2436 | Oil Operator | Oct 2025 |
| 4394 | Parish Petroleum Company | Tulsa, OK 74137 | Oil & Gas Operator | Jul 2025 |
| 4395 | Park Avenue Exploration Corp | Oklahoma City, OK 73102-5604 | Oil & Gas Operator | Sep 2011 |
| 4396 | Park Kenneth Y | Skiatook, OK 74070-6060 | Oil & Gas Operator | Dec 2025 |
| 4397 | Park William M | Sperry, OK 74073 | Oil & Gas Operator | Dec 2025 |
| 4398 | Parker & Parsley Dev Co | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 4399 | Parker & Parsley Dev LP | Irving, TX 75039-3745 | Oil & Gas Operator | Mar 2015 |
| 4400 | Parker James A | Sand Springs, OK 74063 | Oil & Gas Operator | Dec 2025 |