| 6301 | Contango Midstream Company | Houston, TX 77002-3023 | Oil & Gas Operator | Apr 2026 |
| 6302 | Contango Operators, Inc. | Houston, TX 77098 | Oil & Gas Operator | Dec 2022 |
| 6303 | Contango Operators, LLC | | Oil & Gas Operator | Nov 2024 |
| 6304 | Contango Resources Company | | Oil & Gas Operator | Mar 2009 |
| 6305 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | Jun 2026 |
| 6306 | Contango Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2026 |
| 6307 | Contango Rocky Mountain Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2020 |
| 6308 | Continental Brok | | Oil Operator | Oct 1994 |
| 6309 | Continental Ener | | Oil & Gas Operator | Dec 1996 |
| 6310 | Continental Energy | Garden City, KS 67846-0918 | Oil & Gas Operator | Jul 2017 |
| 6311 | Continental Energy Operating LLC | Tulsa, OK 74114-1302 | Oil & Gas Operator | May 2026 |
| 6312 | Continental Expl | | Oil Operator | Sep 1991 |
| 6313 | Continental Exploration LLC | Richardson, TX 75080 | Oil & Gas Operator | Aug 2026 |
| 6314 | Continental Exploration, Inc. | | Oil Operator | Dec 2001 |
| 6315 | Continental Export Corporation | Bowie, TX 76230 | Oil & Gas Operator | Sep 2013 |
| 6316 | Continental Gas Inc | Enid, OK 73702-5103 | Oil & Gas Operator | Apr 2012 |
| 6317 | Continental Industries LC | Casper, WY 82602 | Oil & Gas Operator | Feb 2008 |
| 6318 | Continental Oil | | Oil Operator | Jun 1985 |
| 6319 | Continental Oil & Gas Co. Inc. | | Oil & Gas Operator | Jul 1997 |
| 6320 | Continental Oil & Refining Co | Catoosa, OK 74015-0831 | Oil & Gas Operator | Feb 2026 |
| 6321 | Continental Oil Co. | Durango, CO 81301 | Oil & Gas Operator | Dec 1983 |
| 6322 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Aug 2026 |
| 6323 | Continental Petroleum, LLC | | Oil & Gas Operator | Oct 2013 |
| 6324 | Continental Production Co LLC | Greenwood VIllage, CO 80155 | Oil & Gas Operator | Aug 2012 |
| 6325 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Aug 2026 |
| 6326 | Continental Trend Resources, Inc | Oklahoma City, OK 73126 | Oil & Gas Operator | Aug 2026 |
| 6327 | Continental-Emsco Co | Hobbs, NM 88241 | Oil & Gas Operator | Jun 1995 |
| 6328 | Continual Oil & Gas, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Aug 2026 |
| 6329 | Continuum Midstream, LLC | Tulsa, OK 74136 | Oil Operator | Feb 2026 |
| 6330 | Contour Energy E & P, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2002 |
| 6331 | Contour Energy E & P, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2003 |
| 6332 | Contour Expl And Prod, LLC | Dallas, TX 75204 | Oil & Gas Operator | Aug 2026 |
| 6333 | Contour Oil & Gas, LLC | Abilene, TX 79602 | Oil & Gas Operator | Dec 2015 |
| 6334 | Contract Energy, L.L.C. | Houston, TX 77057 | Oil & Gas Operator | Oct 2012 |
| 6335 | Contract Oil & Gas Service Co. | Tomball, TX 77375 | Oil & Gas Operator | Apr 2007 |
| 6336 | Contrast Energy, LLC | Tulsa, OK 74119 | Oil & Gas Operator | Aug 2026 |
| 6337 | Contreras Al Consultants Inc | Oklahoma City, OK 73113-0762 | Oil & Gas Operator | Oct 2020 |
| 6338 | Converse Oil Corp. | | Oil Operator | Dec 2010 |
| 6339 | Convert Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2019 |
| 6340 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 6341 | Conway Energy Oper Services Inc. | San Diego, TX 78384 | Oil & Gas Operator | Aug 2026 |
| 6342 | Cook D L | Holliday, TX 76366 | Oil & Gas Operator | Dec 2008 |
| 6343 | Cook Energy Inc | Cooksburg, PA 16217-0054 | Oil & Gas Operator | Dec 2004 |
| 6344 | Cook Exploration Co. | Longview, TX 75602 | Oil & Gas Operator | Aug 2026 |
| 6345 | Cook Inlet Energy, LLC. | | Oil & Gas Operator | Feb 2026 |
| 6346 | Cook L D | Bartlesville, OK 74005-2306 | Oil & Gas Operator | Nov 2005 |
| 6347 | Cook Marshall Operating, Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 1995 |
| 6348 | Cook Oil Company | Wewoka, OK 74884 | Oil & Gas Operator | Apr 2026 |
| 6349 | Cook Operating C | | Oil Operator | May 1987 |
| 6350 | Cook Production LLC | | Oil Operator | Jan 2025 |
| 6351 | Cook Robert L | Rockwall, TX 75087-0892 | Oil & Gas Operator | Mar 2015 |
| 6352 | Cook W R Inc | Duncan, OK 73534-0069 | Oil & Gas Operator | Jun 2000 |
| 6353 | Cook William Glenn | Wewoka, OK 74884-0727 | Oil & Gas Operator | Nov 2000 |
| 6354 | Cook, James A. | Augusta, KS 67010 | Oil Operator | Jul 1997 |
| 6355 | Cook, Kenneth D. Operator | Midland, TX 79707 | Oil Operator | Aug 2026 |
| 6356 | Cook, Lee J. | Penn Yan, NY 14527 | Gas Operator | Dec 2025 |
| 6357 | Cooke & Montague Oper. Co., Inc. | Flower Mound, TX 75028 | Oil & Gas Operator | Aug 2026 |
| 6358 | Cooke County Production Company | Shawnee, OK 74801-1800 | Oil & Gas Operator | Jan 2022 |
| 6359 | Cooke Energy Company | San Antonio, TX 78250 | Oil & Gas Operator | Jul 2012 |
| 6360 | Cooke, Donald E./Lee Wanda | Coffeyville, KS 67331 | Oil Operator | Dec 2001 |
| 6361 | Cooke, Kenny D. Operating | Ballinger, TX 76821 | Oil & Gas Operator | Mar 2004 |
| 6362 | Cool Spring Colony, Inc. | Rudyard, MT 59540 | Gas Operator | May 2026 |
| 6363 | Coolidge, G. B., Inc. | Shelby, MT 59474 | Oil & Gas Operator | Aug 2016 |
| 6364 | Coolidge, Paul | | Oil Operator | Jan 2026 |
| 6365 | Coolidge, Timothy J & Billiette Nebel | Kevin, MT 59454 | Oil Operator | Jan 2026 |
| 6366 | Coolspring Gas & Oil Co LLC | Coolspring, PA 15730-8524 | Gas Operator | Dec 2025 |
| 6367 | Coomer, Mitchell | Columbia, KY 42728 | Oil Operator | Dec 2024 |
| 6368 | Coon Creek Gas Inc | | Oil & Gas Operator | Mar 2014 |
| 6369 | Coop Energy, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Aug 2026 |
| 6370 | Cooper & Brain Inc. | | Oil & Gas Operator | Mar 2026 |
| 6371 | Cooper A L & Mae C | | Oil & Gas Operator | Jan 2001 |
| 6372 | Cooper Energy Corp | | Oil & Gas Operator | Jun 1995 |
| 6373 | Cooper John T | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 6374 | Cooper Lisa L | Cushing, OK 74023 | Oil & Gas Operator | Mar 2015 |
| 6375 | Cooper Mineral Group Inc | Bellaire, TX 77401 | Oil & Gas Operator | Feb 2004 |
| 6376 | Cooper Oil & Gas, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | May 2010 |
| 6377 | Cooper Oil & Gas, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Aug 2026 |
| 6378 | Cooper Oil Company | Andover, KS 67002 | Oil Operator | Oct 1997 |
| 6379 | Cooper Oil Inc | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 6380 | Cooper Operating | Olney, TX 76374 | Oil Operator | Apr 2007 |
| 6381 | Cooper Operating LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2026 |
| 6382 | Cooper Production Company | New Braunfels, TX 78132 | Oil & Gas Operator | Sep 2021 |
| 6383 | Cooper Service Co. | | Oil & Gas Operator | Sep 2025 |
| 6384 | Cooper, Glenn W. Oil & Gas | Seymour, TX 76380 | Oil & Gas Operator | Feb 2000 |
| 6385 | Cooper, J. M. | Winfield, KS 67119 | Oil Operator | Oct 1997 |
| 6386 | Cooper, Lowell E. | Peabody, KS 66866 | Oil Operator | Nov 1987 |
| 6387 | Coors Energy | Golden, CO 80402-0467 | Oil & Gas Operator | Sep 1992 |
| 6388 | Coots, Jesse | Le Roy, NY 14482 | Gas Operator | Dec 2025 |
| 6389 | Copano Company | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 6390 | Copano Gas Unit | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 6391 | Cope Oil Company | Valley VIew, TX 76272 | Oil & Gas Operator | Feb 2015 |
| 6392 | Copeland Gas LLC | Albion, PA 16401 | Gas Operator | Dec 2025 |
| 6393 | Copestone Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Aug 2026 |
| 6394 | Copper Land Resources LLC | | Oil Operator | May 2026 |
| 6395 | Copper Ridge Oil Inc | Olean, NY 14760 | Oil & Gas Operator | Dec 2024 |
| 6396 | Copper Ridge Resources LLC | Midland, TX 79710 | Oil Operator | Jun 2026 |
| 6397 | Copperhead Creek Enterprises, Inc. | Chautauqua, KS 67334 | Oil Operator | Sep 2019 |
| 6398 | Copperhead Enterprises LLC | | Oil & Gas Operator | Dec 2025 |
| 6399 | Copperhead Oil | Colony, KS 66015 | Oil Operator | Sep 1985 |
| 6400 | Copperhead Oil & Gas, LTD. | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2017 |