| 6301 | Complete Energy Services LLC | Gainesville, TX 76240 | Oil Operator | Aug 2022 |
| 6302 | Compostella Oil Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 6303 | Compressor Syste | | Oil Operator | May 1991 |
| 6304 | Compro Services Inc | Williamstown, WV 26187 | Oil & Gas Operator | Dec 1985 |
| 6305 | Comstock Energy, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Jul 2025 |
| 6306 | Comstock Offshore, LLC | | Oil & Gas Operator | Nov 2004 |
| 6307 | Comstock Oil & Gas -- La, Inc. | | Oil & Gas Operator | Mar 2005 |
| 6308 | Comstock Oil & Gas, Inc. | Frisco, TX 75034 | Oil & Gas Operator | Dec 2012 |
| 6309 | Comstock Oil & Gas, LLC | Frisco, TX 75034 | Oil & Gas Operator | Jul 2025 |
| 6310 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 6311 | Comstock Oil & Gas--La, LLC | | Oil & Gas Operator | Dec 2024 |
| 6312 | Comyn Natural Gas, Inc. | Fort Worth, TX 76163 | Oil & Gas Operator | Jul 2025 |
| 6313 | Con-Lin Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Nov 2017 |
| 6314 | Conch Oil, Inc. | Wichita, KS 67202 | Oil Operator | Jun 2002 |
| 6315 | Concho Exploration | Midland, TX 79701 | Oil & Gas Operator | Feb 2004 |
| 6316 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 6317 | Concho Oil & Gas Corp. | Midland, TX 79701 | Oil & Gas Operator | May 2003 |
| 6318 | Concho Oilfield Serv & Oper Co. | Eden, TX 76837 | Oil & Gas Operator | Jul 2025 |
| 6319 | Concho Oilfield Service, Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2013 |
| 6320 | Concho Petroleum | | Oil & Gas Operator | Dec 1994 |
| 6321 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 6322 | Concor Petroleum, Inc. | | Oil & Gas Operator | Feb 1983 |
| 6323 | Concord Energy, Inc. | Glen Rose, TX 76043 | Oil & Gas Operator | Jul 2025 |
| 6324 | Concord Operating Incorporated | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Dec 2008 |
| 6325 | Concord Resources, LLC | | Oil & Gas Operator | Nov 2000 |
| 6326 | Concorde Exploration, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 1994 |
| 6327 | Concorde Resources Corporation | Eufaula, OK 74432 | Oil & Gas Operator | Apr 2025 |
| 6328 | Concordia Resources Inc. | | Oil & Gas Operator | May 2025 |
| 6329 | Condor Energy | | Oil Operator | Aug 1995 |
| 6330 | Condor Energy Inc | Great Bend, KS 67530 | Oil & Gas Operator | Oct 2021 |
| 6331 | Condor Energy Technology LLC | | Oil & Gas Operator | Jul 2018 |
| 6332 | Condor Exploration LLC | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Sep 2009 |
| 6333 | Condor Oil Company Inc. | | Oil & Gas Operator | Dec 2000 |
| 6334 | Condor Oil Corp | Boulder, CO 80303 | Oil & Gas Operator | Dec 1994 |
| 6335 | Condor Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 6336 | Condor Operating Company, LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 6337 | Condor Petroleum | | Oil & Gas Operator | Nov 1990 |
| 6338 | Condor Petroleum Corporation | | Oil & Gas Operator | Aug 2020 |
| 6339 | Condor Petroleum, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
| 6340 | Condra, James M. Jr. | Sonora, TX 76950 | Oil & Gas Operator | May 1996 |
| 6341 | Condrin Oil 1985-A LTD | Tulsa, OK 74136 | Oil & Gas Operator | Nov 1998 |
| 6342 | Condry Oil Compa | | Oil Operator | May 1992 |
| 6343 | Cone & Petree Oil & Gas Exp. Inc | Lubbock, TX 79453 | Oil & Gas Operator | May 2024 |
| 6344 | Cone, Charles M. Services, Inc. | Dallas, TX 75372 | Oil & Gas Operator | Sep 2005 |
| 6345 | Cone, Ronald M. | Stafford, NY 14143 | Gas Operator | Dec 2024 |
| 6346 | Cone, S. E. Jr. | Lubbock, TX 79408 | Oil & Gas Operator | Feb 2002 |
| 6347 | Confed Oil Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 6348 | Confederate Bay LLC | Okemah, OK 74859 | Oil & Gas Operator | Apr 2025 |
| 6349 | Confederate Spooling Inc | Okemah, OK 74859-2409 | Oil & Gas Operator | Apr 2020 |
| 6350 | Conklin Robert L Dba Conklin Oil LLC | Tulsa, OK 74153 | Oil Operator | Apr 2025 |
| 6351 | Conklin, Patrick J. | Rushville, NY 14544 | Gas Operator | Dec 2024 |
| 6352 | Conley Energy Co LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2020 |
| 6353 | Conley Oil, Inc | Salyersville, KY 41465 | Oil & Gas Operator | Dec 2022 |
| 6354 | Conley P Smith Operating Co. | | Oil & Gas Operator | Jun 1995 |
| 6355 | Conley, Harry | Colony, KS 66015 | Oil Operator | Mar 2025 |
| 6356 | Conley, John | | Oil Operator | Aug 2000 |
| 6357 | Conn Energy Group, LLC | | Oil & Gas Operator | Apr 2024 |
| 6358 | Conn-Okla Producing Co Inc | | Oil & Gas Operator | Nov 1992 |
| 6359 | Connaway Oil & Gas Co. | Brookesmith, TX 76827 | Oil & Gas Operator | Feb 2016 |
| 6360 | Connell, Mark Allen | Claflin, KS 67525 | Oil Operator | Mar 2025 |
| 6361 | Conner Jelly | Seminole, OK 74868 | Oil & Gas Operator | Mar 1996 |
| 6362 | Conner Production Co LLC | Seminole, OK 74868 | Oil & Gas Operator | Apr 2025 |
| 6363 | Conner, E B Jr | | Oil & Gas Operator | Dec 2023 |
| 6364 | Conner, Eugene | Bartlesville, OK 74005 | Oil & Gas Operator | Jul 2020 |
| 6365 | Conner, Rick | Winfield, KS 67156 | Oil Operator | Aug 2019 |
| 6366 | Conner-Marrs Company | Tulsa, OK 74105 | Oil & Gas Operator | Jul 2025 |
| 6367 | Connie J & Ronald L Yeany | Fairmount City, PA 16224-1903 | Gas Operator | Dec 2024 |
| 6368 | Connoil LLC | Grove City, OH 43123 | Oil & Gas Operator | Dec 2024 |
| 6369 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 6370 | Conoco Incorpora | | Oil & Gas Operator | Apr 1988 |
| 6371 | ConocoPhillips Alaska, Inc. | | Oil & Gas Operator | Jun 2025 |
| 6372 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 6373 | Conquest Energy, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Jul 2025 |
| 6374 | Conquest Exploration | Houston, TX 77068 | Oil & Gas Operator | May 1991 |
| 6375 | Conquest Exploration Co. | | Oil & Gas Operator | Mar 1992 |
| 6376 | Conquest Oil Company | Big Spring, TX 79721 | Oil & Gas Operator | Aug 2024 |
| 6377 | Conquest Petroleum Inc | | Oil & Gas Operator | Nov 2014 |
| 6378 | Conquistador Petroleum,Inc. | Coleman, TX 76834 | Oil & Gas Operator | Jul 2025 |
| 6379 | Conrade Patsy | | Oil Operator | Jan 1986 |
| 6380 | Cons Asset MGMT SVCS E&P Op, LLC | Houston, TX 77002 | Oil Operator | Dec 2017 |
| 6381 | Considine, Barry | Burrton, KS 67020 | Gas Operator | Mar 2025 |
| 6382 | Consol Gas Company | Canonsburg, PA 15317 | Oil & Gas Operator | Dec 2021 |
| 6383 | Consolidated Energy Inv., Inc. | | Oil & Gas Operator | Oct 2013 |
| 6384 | Consolidated Energy Res., Inc. | | Oil Operator | Jun 1992 |
| 6385 | Consolidated Engy Reserve Inc | | Oil & Gas Operator | Jul 1991 |
| 6386 | Consolidated Exploration Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 6387 | Consolidated Gas & Energy Corp. | San Diego, CA 92130 | Oil Operator | Apr 2012 |
| 6388 | Consolidated Natural Res. Corp. | Kilgore, TX 75662 | Oil & Gas Operator | Jan 2016 |
| 6389 | Consolidated Oil | | Oil Operator | Jul 1996 |
| 6390 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 6391 | Consolidated Oil Well Services, Inc | Chanute, KS 66720 | Oil Operator | Jan 2008 |
| 6392 | Consolidated Peto Equity LTD | La Crescenta, CA 91214 | Oil & Gas Operator | Dec 1996 |
| 6393 | Consolidated Petro PTNRS I, LLC | Austin, TX 78759 | Oil & Gas Operator | Mar 2003 |
| 6394 | Consolidated Petrol Corp | Columbus, OH 43215 | Oil & Gas Operator | Dec 1995 |
| 6395 | Consolidated Production Inc. | Seminole, OK 74868 | Oil & Gas Operator | Apr 2025 |
| 6396 | Consolidated Properties | Tulsa, OK 74129 | Oil & Gas Operator | Jan 2017 |
| 6397 | Consolidated Res Of Amer | Cincinnati, OH 45208 | Oil & Gas Operator | Dec 1996 |
| 6398 | Consolidated Resources Corp | Shawnee, OK 74801 | Oil & Gas Operator | Sep 2014 |
| 6399 | Consolidated Resources Inc | | Oil & Gas Operator | May 2004 |
| 6400 | Consolidation Coal Company | Saint Clairsville, OH 43950-8742 | Oil & Gas Operator | Dec 2020 |