| 4301 | Buttonwood Petro | | Oil & Gas Operator | Aug 1994 |
| 4302 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 4303 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 4304 | Buttram Operating Company LLC | Heath, TX 75032-1931 | Oil & Gas Operator | Apr 2025 |
| 4305 | Buxton Energy LLC | Oklahoma City, OK 73116-9111 | Oil & Gas Operator | Apr 2014 |
| 4306 | Buxton Fred M | Oklahoma City, OK 73116-9111 | Oil & Gas Operator | Feb 2007 |
| 4307 | BVD Inc | Yates Center, KS 66783-0194 | Oil & Gas Operator | Apr 2025 |
| 4308 | BVX Operating, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Jun 2025 |
| 4309 | BW Oil LLC | Hamel, MN 55340 | Oil Operator | Jun 2015 |
| 4310 | Bwab Incorporated | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 4311 | BWB Resources Inc | Colorado Springs, CO 80908-7204 | Oil & Gas Operator | Jan 2016 |
| 4312 | BWC Energy LLC | Edgerton, KS 66021 | Oil Operator | Feb 2025 |
| 4313 | BXP Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Jun 2025 |
| 4314 | Byargeon & Sons Oil Co. | | Oil Operator | Nov 2000 |
| 4315 | Byars Bill Inc | Okmulgee, OK 74447-0850 | Oil & Gas Operator | Apr 2015 |
| 4316 | Byers Clarice An | | Oil Operator | Nov 1988 |
| 4317 | Byers, R.D. | Vernon, TX 76384 | Oil & Gas Operator | Feb 1998 |
| 4318 | Bykowicz, Francis J. | Elma, NY 14059 | Gas Operator | Dec 2023 |
| 4319 | Byler Drilling Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2025 |
| 4320 | Byng Energy Group Inc | Enid, OK 73703 | Oil & Gas Operator | Jun 2025 |
| 4321 | Byng Operating LLC | Ada, OK 74820-0677 | Oil & Gas Operator | Mar 2025 |
| 4322 | Bynum Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2003 |
| 4323 | Byrd Operating Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2025 |
| 4324 | Byrne Oil Company | Lubbock, TX 79424 | Oil & Gas Operator | Jun 2025 |
| 4325 | Byrne, Robert E. | Lubbock, TX 79416 | Oil & Gas Operator | Jan 2005 |
| 4326 | Byron Oil Industries Inc | Ballwin, MO 63011 | Oil & Gas Operator | Apr 2019 |
| 4327 | Byron Ruple | | Oil Operator | Jan 2025 |
| 4328 | Bytex Oil Company | Midland, TX 79708 | Oil & Gas Operator | Jan 2019 |
| 4329 | C & A Enterprises | Ballinger, TX 76821 | Oil & Gas Operator | Jun 2025 |
| 4330 | C & A Oil Company | Edmond, OK 73013-9413 | Oil & Gas Operator | Mar 2015 |
| 4331 | C & B Exploration Company, Inc. | | Oil & Gas Operator | Oct 2008 |
| 4332 | C & B Exploration, LLC | Fort Worth, TX 76179 | Oil Operator | Jun 2025 |
| 4333 | C & B Oil Company | Drumright, OK 74030 | Oil & Gas Operator | Apr 2025 |
| 4334 | C & B Operating Inc. | St John, KS 67576 | Oil & Gas Operator | Feb 2025 |
| 4335 | C & B Production | Ben Bolt, TX 78342 | Oil & Gas Operator | Jun 2025 |
| 4336 | C & C Downhole, LLC | Richmond, KY 40475 | Oil & Gas Operator | Dec 2023 |
| 4337 | C & C Minerals LTD | | Oil & Gas Operator | Dec 2019 |
| 4338 | C & C Oil | | Oil & Gas Operator | Jan 2004 |
| 4339 | C & C Oil & Gas | Ranger, TX 76470 | Oil & Gas Operator | Jun 2025 |
| 4340 | C & C Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Mar 2025 |
| 4341 | C & C Oil Producers | Borger, TX 79008 | Oil & Gas Operator | Jun 2025 |
| 4342 | C & C Operating, Inc. | | Oil Operator | Dec 2024 |
| 4343 | C & C Operating, LLC | Iowa Park, TX 76367 | Oil Operator | Jun 2025 |
| 4344 | C & C Petroleum Management, LLC | Abilene, TX 79601 | Oil & Gas Operator | Jun 2025 |
| 4345 | C & C Producing LLC | Creston, OH 44217 | Oil & Gas Operator | Dec 2024 |
| 4346 | C & C Productions LLC | Muskogeee, OK 74402 | Oil & Gas Operator | Apr 2025 |
| 4347 | C & C Tank Service LLC | | Oil & Gas Operator | Sep 2022 |
| 4348 | C & C Tank Service, Inc. | Sterling, KS 67579 | Oil Operator | Oct 2020 |
| 4349 | C & C Tank Truck Service Inc | Holdenville, OK 74848 | Oil Operator | Feb 2012 |
| 4350 | C & D Drilling Company | Hennepin, OK 73046 | Oil & Gas Operator | Mar 2007 |
| 4351 | C & D Energy Company, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 1994 |
| 4352 | C & D Gas Co | Apollo, PA 15613-9714 | Oil & Gas Operator | Dec 2024 |
| 4353 | C & D Oil & Gas LLC | Dorset, OH 44032 | Oil & Gas Operator | Dec 2024 |
| 4354 | C & D Resources, Inc. | | Oil & Gas Operator | Nov 2001 |
| 4355 | C & D Supply LLC | Cherokee, OK 73728-5817 | Oil & Gas Operator | Apr 2025 |
| 4356 | C & E Oil Company | Corpus Christi, TX 78418 | Oil Operator | Jan 1989 |
| 4357 | C & E Oil, LLC | Grenola, KS 67346 | Oil Operator | Nov 2021 |
| 4358 | C & E Operating, Inc. | Hockley, TX 77447 | Oil & Gas Operator | Jun 2025 |
| 4359 | C & E Prod Incor | | Oil Operator | Nov 1996 |
| 4360 | C & F Energy, Co. | Oil City, LA 71061 | Oil & Gas Operator | Dec 1996 |
| 4361 | C & F Oil Company, Inc. | | Oil Operator | Jan 2025 |
| 4362 | C & F Petroleum | | Oil & Gas Operator | Apr 1991 |
| 4363 | C & F Petroleum, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | May 2013 |
| 4364 | C & F Ranch LLC | Iola, KS 66749 | Oil Operator | Dec 2024 |
| 4365 | C & G Drilling, Inc. | Eureka, KS 67045 | Oil Operator | Feb 2025 |
| 4366 | C & G Energy Inc | | Oil & Gas Operator | Jun 1996 |
| 4367 | C & G Oil Compan | | Oil & Gas Operator | Dec 1989 |
| 4368 | C & G Operating, LLC | San Antonio, TX 78209 | Oil Operator | Jun 2025 |
| 4369 | C & G Petroleum, Inc. | Imperial, TX 79743 | Oil & Gas Operator | Aug 2004 |
| 4370 | C & G Transports, Inc. | Woodson, TX 76491 | Oil & Gas Operator | Jun 2025 |
| 4371 | C & H Energy LLC | Blue Mound, KS 66010 | Oil Operator | Nov 2009 |
| 4372 | C & H Oil Company | Ratliff City, OK 73481-0130 | Oil & Gas Operator | Apr 2015 |
| 4373 | C & H Oil LLC | Greensburg, KY 42743 | Oil Operator | Dec 2023 |
| 4374 | C & H Well Servicing Inc | Gillette, WY 82717 | Oil & Gas Operator | Apr 2025 |
| 4375 | C & J Exploration LLC | Colorado Springs, CO 80920-3946 | Oil & Gas Operator | Oct 2022 |
| 4376 | C & J Field Services | | Oil & Gas Operator | Apr 2025 |
| 4377 | C & J Oil | | Oil & Gas Operator | Mar 2025 |
| 4378 | C & J Production LLC | Marion, KS 66861 | Oil & Gas Operator | Feb 2025 |
| 4379 | C & J Pumping, Inc. | Sylvia, KS 67581 | Oil & Gas Operator | Dec 2009 |
| 4380 | C & J Trucks LLC | Seminole, OK 74868-5406 | Oil & Gas Operator | Apr 2025 |
| 4381 | C & J Well No 1 And C & J Well No 2 | Philippi, WV 26416 | Gas Operator | Dec 2021 |
| 4382 | C & K Offshore Company | | Oil & Gas Operator | Oct 1980 |
| 4383 | C & K Operating LLC | Kingman, KS 67068 | Oil & Gas Operator | Feb 2025 |
| 4384 | C & K Petroleum | | Oil & Gas Operator | Jan 1984 |
| 4385 | C & K Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Apr 1984 |
| 4386 | C & L Drilling Company | Ada, OK 74821-1252 | Oil & Gas Operator | Jan 2014 |
| 4387 | C & L Enterprise Of Wagoner | Coweta, OK 74429-9657 | Oil Operator | Mar 2001 |
| 4388 | C & L Enterprises Inc | Lindsay, OK 73052 | Oil & Gas Operator | Mar 2025 |
| 4389 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Mar 2025 |
| 4390 | C & L Oil Company | Cross Plains, TX 76443 | Oil & Gas Operator | Jun 2025 |
| 4391 | C & L Operating, Inc. | Valera, TX 76884 | Oil & Gas Operator | Jun 2025 |
| 4392 | C & M Exploration LLC | Tulsa, OK 74159-1331 | Oil & Gas Operator | Jun 2014 |
| 4393 | C & M Oil Co. & Investments | | Oil & Gas Operator | Apr 2025 |
| 4394 | C & M Operating Company | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 4395 | C & M Operating, Inc. (A) | Alleyton, TX 78935 | Gas Operator | Aug 2011 |
| 4396 | C & N Oil & Gas Company | Albany, OH 45710 | Oil & Gas Operator | Dec 2012 |
| 4397 | C & N Oil Co | Monahans, TX 79756 | Oil Operator | Jun 2025 |
| 4398 | C & N Royalties, L.L.C. | | Oil & Gas Operator | Oct 2015 |
| 4399 | C & O Production | Nocona, TX 76255 | Oil & Gas Operator | Feb 2020 |
| 4400 | C & P Energy Inc | Hampton, AR 71744 | Oil Operator | Dec 2014 |