| 4201 | Butkin Oil Company | Duncan, OK 73534-2090 | Oil & Gas Operator | Sep 2021 |
| 4202 | Butkin Oil Company LLC | Duncan, OK 73533 | Oil & Gas Operator | Mar 2023 |
| 4203 | Butler & Harbison | Olney, TX 76374 | Oil & Gas Operator | Oct 2005 |
| 4204 | Butler & Haseloff | Vernon, TX 76384 | Oil Operator | Jul 1993 |
| 4205 | Butler B F | Hobart, OK 73651 | Oil Operator | Apr 2014 |
| 4206 | Butler County Flood, Inc | Santa Monica, CA 90409 | Oil Operator | Dec 2015 |
| 4207 | Butler Larry | Bladensburg, OH 43005 | Oil & Gas Operator | Dec 2019 |
| 4208 | Butler Oil Co | Casper, WY 82602 | Oil & Gas Operator | Dec 1996 |
| 4209 | Butler Petroleum Corp | Norman, OK 73069-7111 | Oil & Gas Operator | Dec 1998 |
| 4210 | Butler Petroleum LLC | Van Alstyne, TX 75495 | Oil Operator | May 2020 |
| 4211 | Butler, C. D. | Grandfalls, TX 79742 | Oil & Gas Operator | Dec 2004 |
| 4212 | Butler, Cecil D | | Oil & Gas Operator | Jan 2026 |
| 4213 | Butler, Harold F. | Independence, KS 67301 | Oil Operator | Sep 2002 |
| 4214 | Butler, Kevin O. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 4215 | Butler, Kevin O. & Assoc., Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2026 |
| 4216 | Butte Oil And Gas Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | Feb 2026 |
| 4217 | Buttes Gas & Oil Co | | Oil & Gas Operator | Dec 2009 |
| 4218 | Buttes Resources Company | Houston, TX 77056 | Oil & Gas Operator | May 2007 |
| 4219 | Buttonwood Petro | | Oil & Gas Operator | Aug 1994 |
| 4220 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 4221 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 4222 | Buttram Operating Company LLC | Heath, TX 75032-1931 | Oil & Gas Operator | Nov 2025 |
| 4223 | Buxton Energy LLC | Oklahoma City, OK 73116-9111 | Oil & Gas Operator | Apr 2014 |
| 4224 | Buxton Fred M | Oklahoma City, OK 73116-9111 | Oil & Gas Operator | Feb 2007 |
| 4225 | BVD Inc | Yates Center, KS 66783-0194 | Oil & Gas Operator | Feb 2026 |
| 4226 | BVX Operating, Inc. | Boerne, TX 78006 | Oil & Gas Operator | May 2026 |
| 4227 | BW Oil LLC | Hamel, MN 55340 | Oil Operator | Jun 2015 |
| 4228 | Bwab Incorporated | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 4229 | BWB Resources Inc | Colorado Springs, CO 80908-7204 | Oil & Gas Operator | Jan 2016 |
| 4230 | BWC Energy LLC | Edgerton, KS 66021 | Oil Operator | Dec 2025 |
| 4231 | BXP Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | May 2026 |
| 4232 | Byargeon & Sons Oil Co. | | Oil Operator | Nov 2000 |
| 4233 | Byars Bill Inc | Okmulgee, OK 74447-0850 | Oil & Gas Operator | Apr 2015 |
| 4234 | Byers Clarice An | | Oil Operator | Nov 1988 |
| 4235 | Byers, R.D. | Vernon, TX 76384 | Oil & Gas Operator | Feb 1998 |
| 4236 | Bykowicz, Francis J. | Elma, NY 14059 | Gas Operator | Dec 2024 |
| 4237 | Byler Drilling Company | Midland, TX 79702 | Oil & Gas Operator | May 2026 |
| 4238 | Byng Energy Group Inc | Enid, OK 73703 | Oil & Gas Operator | May 2026 |
| 4239 | Byng Operating LLC | Ada, OK 74820-0677 | Oil & Gas Operator | Feb 2026 |
| 4240 | Bynum Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2003 |
| 4241 | Byrd Operating Company | Midland, TX 79702 | Oil & Gas Operator | May 2026 |
| 4242 | Byrne Oil Company | Lubbock, TX 79464 | Oil & Gas Operator | May 2026 |
| 4243 | Byrne, Robert E. | Lubbock, TX 79416 | Oil & Gas Operator | Jan 2005 |
| 4244 | Byron Oil Industries Inc | Ballwin, MO 63011 | Oil & Gas Operator | Apr 2019 |
| 4245 | Byron Ruple | | Oil Operator | Jan 2025 |
| 4246 | Bytex Oil Company | Midland, TX 79708 | Oil & Gas Operator | Jan 2019 |
| 4247 | C & A Enterprises | Ballinger, TX 76821 | Oil & Gas Operator | May 2026 |
| 4248 | C & A Oil Company | Edmond, OK 73013-9413 | Oil & Gas Operator | Mar 2015 |
| 4249 | C & B Energy Resources | Bartlesville, OK 74006 | Oil & Gas Operator | Mar 2015 |
| 4250 | C & B Exploration Company, Inc. | | Oil & Gas Operator | Oct 2008 |
| 4251 | C & B Exploration, LLC | Fort Worth, TX 76179 | Oil Operator | May 2026 |
| 4252 | C & B Operating Inc. | St John, KS 67576 | Oil & Gas Operator | Dec 2025 |
| 4253 | C & B Production | Ben Bolt, TX 78342 | Oil & Gas Operator | May 2026 |
| 4254 | C & C Downhole, LLC | Richmond, KY 40475 | Oil & Gas Operator | Dec 2024 |
| 4255 | C & C Minerals LTD | | Oil & Gas Operator | Dec 2019 |
| 4256 | C & C Oil | | Oil & Gas Operator | Jan 2004 |
| 4257 | C & C Oil & Gas | Ranger, TX 76470 | Oil & Gas Operator | May 2026 |
| 4258 | C & C Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Jan 2026 |
| 4259 | C & C Oil Producers | Borger, TX 79008 | Oil & Gas Operator | May 2026 |
| 4260 | C & C Operating, Inc. | | Oil Operator | Dec 2024 |
| 4261 | C & C Operating, LLC | Iowa Park, TX 76367 | Oil Operator | May 2026 |
| 4262 | C & C Petroleum Management, LLC | Abilene, TX 79601 | Oil & Gas Operator | May 2026 |
| 4263 | C & C Producing LLC | Creston, OH 44217 | Oil & Gas Operator | Dec 2025 |
| 4264 | C & C Productions LLC | Muskogeee, OK 74402 | Oil & Gas Operator | Jan 2026 |
| 4265 | C & C Tank Service LLC | | Oil & Gas Operator | Sep 2022 |
| 4266 | C & C Tank Service, Inc. | Sterling, KS 67579 | Oil Operator | Oct 2020 |
| 4267 | C & C Tank Truck Service Inc | Holdenville, OK 74848 | Oil Operator | Feb 2012 |
| 4268 | C & D Drilling Company | Hennepin, OK 73046 | Oil & Gas Operator | Mar 2007 |
| 4269 | C & D Energy Company, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 1994 |
| 4270 | C & D Gas Co | Apollo, PA 15613-9714 | Oil & Gas Operator | Dec 2025 |
| 4271 | C & D Oil & Gas LLC | Dorset, OH 44032 | Oil & Gas Operator | Dec 2024 |
| 4272 | C & D Resources, Inc. | | Oil & Gas Operator | Nov 2001 |
| 4273 | C & D Supply | Cherokee, OK 73728-5817 | Oil & Gas Operator | Jan 2026 |
| 4274 | C & D Supply LLC | Cherokee, OK 73728-5817 | Oil & Gas Operator | Feb 2026 |
| 4275 | C & E Oil Company | Corpus Christi, TX 78418 | Oil Operator | Jan 1989 |
| 4276 | C & E Oil, LLC | Grenola, KS 67346 | Oil Operator | Nov 2021 |
| 4277 | C & E Operating, Inc. | Hockley, TX 77447 | Oil & Gas Operator | May 2026 |
| 4278 | C & E Prod Incor | | Oil Operator | Nov 1996 |
| 4279 | C & F Energy, Co. | Oil City, LA 71061 | Oil & Gas Operator | Dec 1996 |
| 4280 | C & F Oil Company, Inc. | | Oil Operator | Jan 2025 |
| 4281 | C & F Petroleum | | Oil & Gas Operator | Apr 1991 |
| 4282 | C & F Petroleum, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | May 2013 |
| 4283 | C & F Ranch LLC | Iola, KS 66749 | Oil Operator | Dec 2025 |
| 4284 | C & G Drilling, Inc | Eureka, KS 67045 | Oil Operator | Dec 2025 |
| 4285 | C & G Energy Inc | | Oil & Gas Operator | Jun 1996 |
| 4286 | C & G Oil Compan | | Oil & Gas Operator | Dec 1989 |
| 4287 | C & G Operating, LLC | San Antonio, TX 78209 | Oil Operator | May 2026 |
| 4288 | C & G Petroleum, Inc. | Imperial, TX 79743 | Oil & Gas Operator | Aug 2004 |
| 4289 | C & G Transports, Inc. | Woodson, TX 76491 | Oil & Gas Operator | May 2026 |
| 4290 | C & H Energy LLC | Blue Mound, KS 66010 | Oil Operator | Nov 2009 |
| 4291 | C & H Oil Company | Ratliff City, OK 73481-0130 | Oil & Gas Operator | Apr 2015 |
| 4292 | C & H Well Servicing Inc | Gillette, WY 82717 | Oil & Gas Operator | Feb 2026 |
| 4293 | C & J Exploration LLC | Colorado Springs, CO 80920-3946 | Oil & Gas Operator | Oct 2022 |
| 4294 | C & J Field Services | | Oil & Gas Operator | Jan 2026 |
| 4295 | C & J Oil | | Oil & Gas Operator | Dec 2025 |
| 4296 | C & J Production LLC | Marion, KS 66861 | Oil & Gas Operator | Feb 2025 |
| 4297 | C & J Pumping, Inc. | Sylvia, KS 67581 | Oil & Gas Operator | Dec 2009 |
| 4298 | C & J Trucks LLC | Seminole, OK 74868-5406 | Oil & Gas Operator | Mar 2026 |
| 4299 | C & J Well No 1 And C & J Well No 2 | Philippi, WV 26416 | Gas Operator | Dec 2021 |
| 4300 | C & K Offshore Company | | Oil & Gas Operator | Oct 1980 |