| 5301 | Century Exploration Resources LLC | | Oil & Gas Operator | Dec 2015 |
| 5302 | Century Mineral Corporation | | Oil & Gas Operator | Dec 1990 |
| 5303 | Century Mining, LLC | | Gas Operator | Dec 2021 |
| 5304 | Century Offshore MGMT. Corp. | | Oil & Gas Operator | Dec 1999 |
| 5305 | Century Oil & Gas Corporation | | Oil & Gas Operator | Dec 1987 |
| 5306 | Century Oil And Gas LLC | Katy, TX 77494 | Oil & Gas Operator | May 2025 |
| 5307 | Century Oil Company Inc | Troy, MI 48098 | Oil Operator | Dec 2024 |
| 5308 | Century Oil Mana | | Oil Operator | Apr 1987 |
| 5309 | Century Oil, Inc. | | Oil Operator | Apr 2022 |
| 5310 | Century Petroleum | Nowata, OK 74048 | Oil & Gas Operator | Dec 2000 |
| 5311 | Century Petroleum, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Jul 2025 |
| 5312 | Century Production Inc | | Oil & Gas Operator | Dec 1986 |
| 5313 | Century Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 5314 | Century Royalty 2000 GP, LLC | Conroe, TX 77301 | Oil & Gas Operator | Jun 2020 |
| 5315 | Century Stimulation & Eng LLC | | Oil Operator | Dec 2015 |
| 5316 | Century Well Service | Cumberland, WV 26047 | Oil & Gas Operator | Dec 2006 |
| 5317 | Ceo Operating, Co. | | Oil & Gas Operator | Dec 1999 |
| 5318 | Cep Mid-Continent LLC | Skiatook, OK 74070 | Oil & Gas Operator | Apr 2025 |
| 5319 | Cerberus Engineering, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2025 |
| 5320 | Cerne, Christine | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 5321 | Cerro Oil Co., Inc. | | Oil Operator | Dec 1987 |
| 5322 | Certified Petroleum Inc. | Mineral Wells, TX 76067 | Oil & Gas Operator | May 2006 |
| 5323 | Cesinger Exploration Service, In | Dallas, TX 75208 | Oil & Gas Operator | Mar 2006 |
| 5324 | Cet Energy Corporation | Spring, TX 77391 | Oil & Gas Operator | Nov 2003 |
| 5325 | Cewell Energy LLC | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 5326 | Cex Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 5327 | CFC Oil Inc | Cyril, OK 73029-5601 | Oil & Gas Operator | May 2025 |
| 5328 | CFG Energy, Inc | | Oil & Gas Operator | Apr 2006 |
| 5329 | CFM 66 LLC | McPherson, KS 67460 | Oil & Gas Operator | Dec 2024 |
| 5330 | CFM Oil, LLC | Artesia, NM 88210 | Oil & Gas Operator | May 2025 |
| 5331 | Cfo Resources, Inc. | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Jul 2025 |
| 5332 | CFT Oil & Gas LLC | | Oil Operator | May 2025 |
| 5333 | CG Oil Co. | San Antonio, TX 78232 | Oil & Gas Operator | Mar 2011 |
| 5334 | CG Operating, Inc. | Austin, TX 78759 | Oil & Gas Operator | Jul 2025 |
| 5335 | CG Technical Operating Co, LLC | Stamford, TX 79553 | Oil Operator | Jul 2025 |
| 5336 | CG&G Oil LLC | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2021 |
| 5337 | Cgas Expl Inc | Columbus, OH 43214-1862 | Oil & Gas Operator | Dec 2006 |
| 5338 | Cgas Exploration | Charleston, WV 25301 | Oil & Gas Operator | Dec 2006 |
| 5339 | CGS Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2023 |
| 5340 | CGT Inc | | Oil & Gas Operator | May 2015 |
| 5341 | CH-Seon Inc. | Dallas, TX 75251 | Oil & Gas Operator | Jul 2025 |
| 5342 | CH4 Energy II LLC | Fort Worth, TX 76109 | Oil & Gas Operator | Apr 2018 |
| 5343 | CH4 Energy LLC | Fort Worth, TX 76102 | Oil & Gas Operator | May 2006 |
| 5344 | CH4 Energy Six, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jul 2025 |
| 5345 | CH4 Production Company Inc | Tulsa, OK 74170-1955 | Gas Operator | May 2007 |
| 5346 | Chace Oil Co Inc | Dallas, TX 75229 | Oil & Gas Operator | Mar 2006 |
| 5347 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | May 2025 |
| 5348 | Chadco, Inc. | | Oil Operator | Dec 2024 |
| 5349 | Chaim Nathan & Edie Bato | | Oil & Gas Operator | May 2025 |
| 5350 | Chain Oil & Gas, Inc. | Houston, TX 77024 | Oil & Gas Operator | Jul 2025 |
| 5351 | Chalice Petroleum Corporation | Dallas, TX 75202 | Oil & Gas Operator | May 1998 |
| 5352 | Chalk, Otis, Estate | Big Spring, TX 79721 | Oil & Gas Operator | Jan 2006 |
| 5353 | Chalker Energy Management II,LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2008 |
| 5354 | Chalker Energy Management,LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2006 |
| 5355 | Chalker Operating Inc. | Richmond, TX 77406 | Oil & Gas Operator | Jul 2016 |
| 5356 | Challenge Operating Inc | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 5357 | Challenger Energy SVCS Co., LLC | Kilgore, TX 75663 | Oil Operator | Jul 2025 |
| 5358 | Challenger Exploration | | Oil Operator | Nov 2014 |
| 5359 | Challenger Minerals Inc. | | Oil & Gas Operator | Dec 1991 |
| 5360 | Challenger Point Energy, LLC | | Oil & Gas Operator | May 2025 |
| 5361 | Chalmers Exploration Company | Abilene, TX 79608 | Oil & Gas Operator | Apr 1997 |
| 5362 | Chalmers-Santa Fe LLC | | Oil & Gas Operator | Dec 2007 |
| 5363 | Chama Resources | Dallas, TX 75354 | Oil & Gas Operator | Apr 2009 |
| 5364 | Chamberlain Dba/Old South Oil | Marietta, OH 45750 | Oil & Gas Operator | Dec 2008 |
| 5365 | Chambers & Hendrix Oil & Gas | Skiatook, OK 74070-0726 | Oil & Gas Operator | Aug 2022 |
| 5366 | Chambers & Mouren | | Oil & Gas Operator | May 2025 |
| 5367 | Chambers Exploration Inc. | | Oil & Gas Operator | Dec 1986 |
| 5368 | Chambers Jerry | Denver, CO 80237 | Oil & Gas Operator | Dec 1993 |
| 5369 | Chambers Jerry Expl Co | | Oil & Gas Operator | Sep 2000 |
| 5370 | Chambers Operating, Inc. | Westbrook, TX 79565 | Oil & Gas Operator | Mar 2006 |
| 5371 | Chambers, R. H. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2006 |
| 5372 | Chambers, R. H. LLC | Abilene, TX 79606 | Oil & Gas Operator | Jul 2025 |
| 5373 | Champ Oil Co, Inc | Hickory Creek, TX 75065 | Oil & Gas Operator | Dec 2020 |
| 5374 | Champ Operating Company | Dallas, TX 75208 | Oil & Gas Operator | Oct 2020 |
| 5375 | Champion Lone Star Operating,LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2020 |
| 5376 | Champion Petrole | | Oil Operator | Jan 1992 |
| 5377 | Champion Reserves-Cri Inc | Oklahoma City, OK 73123 | Oil & Gas Operator | Jun 1994 |
| 5378 | Champion-Park Gas Corporation | Warren, OH 44483 | Oil & Gas Operator | Dec 2023 |
| 5379 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | May 2025 |
| 5380 | Champlin Petroleum Co. | Rock Springs, WY 82902 | Oil & Gas Operator | Mar 1991 |
| 5381 | Champlin SR., Bryan | Kennedy, NY 14747 | Gas Operator | Dec 2024 |
| 5382 | Chan West Oil Corporation | Irving, TX 75016 | Oil & Gas Operator | Jul 2025 |
| 5383 | Chanc West, Inc. | Iraan, TX 79744 | Oil & Gas Operator | Mar 1995 |
| 5384 | Chance Drilling Company | Commerce City, CO 80022 | Oil Operator | Sep 2009 |
| 5385 | Chance Energy Co. Inc. | Amarillo, TX 79114 | Oil & Gas Operator | Sep 1999 |
| 5386 | Chance Oil Co., Inc. | Vernon, TX 76385 | Oil & Gas Operator | Apr 2025 |
| 5387 | Chance Properties Co. | Kermit, TX 79745 | Oil & Gas Operator | Jul 2025 |
| 5388 | Chancellor & Dolezal | | Gas Operator | Apr 1992 |
| 5389 | Chancellor, Earl Sales Co., Inc. | Sweetwater, TX 79556 | Oil & Gas Operator | Jul 2025 |
| 5390 | Chandler & Associated Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 1999 |
| 5391 | Chandler & Associates LLC | | Oil & Gas Operator | Jul 2001 |
| 5392 | Chandler & Associates, Inc. | Denver, CO 80202 | Oil & Gas Operator | May 1997 |
| 5393 | Chandler DJ Basin LLC | | Oil & Gas Operator | Jul 2012 |
| 5394 | Chandler Energy LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2009 |
| 5395 | Chandler Oil & Gas, LLC | Beeville, TX 78102 | Oil & Gas Operator | Jul 2025 |
| 5396 | Chaney & Cogburn Roustabout Well Serv | Cement, OK 73017-0267 | Oil & Gas Operator | Mar 2015 |
| 5397 | Chaney Oil Company | Andrews, TX 79714 | Oil & Gas Operator | Jul 2025 |
| 5398 | Channa Operating, LLC | Houston, TX 77063 | Oil & Gas Operator | Jul 2021 |
| 5399 | Channel Exploration Company | | Oil & Gas Operator | Feb 1997 |
| 5400 | Channel Production Company | Marshall, TX 75670 | Oil & Gas Operator | Jul 2025 |