| 6101 | Columbine Associates | | Oil & Gas Operator | Jun 2026 |
| 6102 | Columbine Exploration Corp | Englewood, CO 80111 | Oil & Gas Operator | Aug 1998 |
| 6103 | Columbus Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 6104 | Columbus Energy, LLC | Houston, TX 77046 | Oil & Gas Operator | Sep 2026 |
| 6105 | Columbus III Production LC | | Oil Operator | Oct 2003 |
| 6106 | Columbus Oil And Gas LLC | | Oil Operator | Oct 2020 |
| 6107 | Columbus Oil Company | Seminole, OK 74868 | Oil & Gas Operator | Jul 2026 |
| 6108 | Columbus Oilfield Explor Co | Powell, OH 43065-9315 | Gas Operator | Dec 2004 |
| 6109 | Columbus Oilfield Exploration Company | Columbus, OH 43220 | Oil & Gas Operator | Dec 2013 |
| 6110 | Columbus Production Inc | | Oil & Gas Operator | Mar 2005 |
| 6111 | Comac Well Service, Inc. | Borger, TX 79008 | Oil & Gas Operator | Mar 2008 |
| 6112 | Comal Operating LLC | Fredericksbrg, TX 78624 | Oil & Gas Operator | Sep 2026 |
| 6113 | Comanche Drilling Company | Cut Bank, MT 59427 | Oil & Gas Operator | Jun 2026 |
| 6114 | Comanche Exploration Co LLC | Oklahoma City, OK 73116-7334 | Oil & Gas Operator | Jul 2026 |
| 6115 | Comanche Exploration Company | Oklahoma City, OK 73120-2797 | Oil & Gas Operator | Feb 2007 |
| 6116 | Comanche Oil & Gas Corp | Salt Lake City, UT 84107-3075 | Oil & Gas Operator | May 2005 |
| 6117 | Comanche Oil And Service, LLC | | Oil Operator | Jun 2026 |
| 6118 | Comanche Operating Co. | Oklahoma City, OK 73120 | Oil & Gas Operator | Aug 2002 |
| 6119 | Comanche Petroleum Corporation | Oklahoma City, OK 73179 | Oil & Gas Operator | Apr 2024 |
| 6120 | Comanche Product | | Oil & Gas Operator | Jan 1992 |
| 6121 | Comanche Production Co | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 1998 |
| 6122 | Comanche Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2006 |
| 6123 | Comanche Resources Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Jul 2026 |
| 6124 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | Sep 2026 |
| 6125 | Combest A L | Purcell, OK 73080-6829 | Oil & Gas Operator | Aug 2021 |
| 6126 | Combined Oil & Gas | Denver, CO 80202 | Oil & Gas Operator | Feb 1990 |
| 6127 | Combined Resources Corporation | Edmond, OK 73083 | Oil & Gas Operator | Sep 2026 |
| 6128 | Combs, Steven H | Corydon, KY 42406 | Oil Operator | Dec 2023 |
| 6129 | Comco Of Louisiana, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2000 |
| 6130 | Comdisco Exploration Inc | | Oil Operator | Dec 1990 |
| 6131 | Comdisco Resources Inc | | Oil Operator | Aug 2004 |
| 6132 | Comerica Properties Corp | | Oil Operator | May 1985 |
| 6133 | Comet Energy Services LLC | Traverse City, MI 49686 | Oil & Gas Operator | Oct 2011 |
| 6134 | Comet Oil & Gas, Inc. | Conroe, TX 77305 | Oil & Gas Operator | Sep 2026 |
| 6135 | Comet Oil Company | Velma, OK 73091 | Oil & Gas Operator | May 2005 |
| 6136 | Comet Production | Conroe, TX 77305 | Oil Operator | Sep 2026 |
| 6137 | Comet-Haines Oil Company | Sulphur, OK 73086-0546 | Oil & Gas Operator | Mar 2013 |
| 6138 | Cometra Oil And Gas, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 1997 |
| 6139 | Command Energy Operating LLC | Tulsa, OK 74119 | Oil & Gas Operator | Jul 2026 |
| 6140 | Commander Oil Company LTD. | | Oil & Gas Operator | Dec 2021 |
| 6141 | Commerce Energy Co | Cleveland, OH 44115 | Oil & Gas Operator | Dec 1987 |
| 6142 | Commerce Energy, Inc. | | Oil & Gas Operator | Dec 1999 |
| 6143 | Commerce Oil & Gas Co | Rocky River, OH 44116 | Oil & Gas Operator | Dec 1996 |
| 6144 | Commercial Energ | | Gas Operator | Oct 1996 |
| 6145 | Commercial Oil - | | Oil Operator | Apr 1994 |
| 6146 | Commercial Oil Company, Inc. | Wichita, KS 67204 | Oil Operator | Jun 2001 |
| 6147 | Commodore Energy Co | Rolling Hills, CA 90274-5265 | Oil & Gas Operator | Dec 2007 |
| 6148 | Common Energy Inc | Douglas, WY 82633 | Oil & Gas Operator | Aug 1995 |
| 6149 | Common Resources L.L.C. | The Woodlands, TX 77380 | Oil & Gas Operator | May 2010 |
| 6150 | Commonwealth Energy, Inc. | Weston, WV 264520000 | Oil & Gas Operator | Dec 2021 |
| 6151 | Commonwealth Pet | | Oil & Gas Operator | Nov 1995 |
| 6152 | Commonwealth Resources, LLC | Fort Collins, CO 80524 | Oil Operator | Dec 2008 |
| 6153 | Commonwealth Royalty, LLC | Balmorhea, TX 79718 | Oil Operator | Sep 2026 |
| 6154 | Compadre Drilling & Expl Corp | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2015 |
| 6155 | Compadres, Inc. | | Oil & Gas Operator | Dec 1988 |
| 6156 | Compass Drilling Inc | Enid, OK 73702-5467 | Oil & Gas Operator | Sep 2014 |
| 6157 | Compass Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2026 |
| 6158 | Compass Exploration LLC | Hill City, KS 67642 | Oil Operator | May 2026 |
| 6159 | Compass Global Resources LLC | | Oil & Gas Operator | Dec 2015 |
| 6160 | Compass Operating, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 6161 | Compass Resources | Enid, OK 73702 | Oil & Gas Operator | Dec 2007 |
| 6162 | Complete Energy Services LLC | Gainesville, TX 76240 | Oil Operator | Aug 2022 |
| 6163 | Compostella Oil Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 6164 | Compressor Syste | | Oil Operator | May 1991 |
| 6165 | Compro Services Inc | Williamstown, WV 26187 | Oil & Gas Operator | Dec 1985 |
| 6166 | Comstock Energy, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2026 |
| 6167 | Comstock Offshore, LLC | | Oil & Gas Operator | Nov 2004 |
| 6168 | Comstock Oil & Gas -- La, Inc. | | Oil & Gas Operator | Mar 2005 |
| 6169 | Comstock Oil & Gas, Inc. | Frisco, TX 75034 | Oil & Gas Operator | Dec 2012 |
| 6170 | Comstock Oil & Gas, LLC | Frisco, TX 75034 | Oil & Gas Operator | Sep 2026 |
| 6171 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 6172 | Comstock Oil & Gas--La, LLC | | Oil & Gas Operator | Dec 2024 |
| 6173 | Comyn Natural Gas, Inc. | Fort Worth, TX 76163 | Oil & Gas Operator | Sep 2026 |
| 6174 | Con-Lin Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Nov 2017 |
| 6175 | Conch Oil, Inc. | Wichita, KS 67202 | Oil Operator | Jun 2002 |
| 6176 | Concharty Oil, Inc. | Bixby, OK 74008 | Oil Operator | Jun 2026 |
| 6177 | Concho Exploration | Midland, TX 79701 | Oil & Gas Operator | Feb 2004 |
| 6178 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 6179 | Concho Oil & Gas Corp. | Midland, TX 79701 | Oil & Gas Operator | May 2003 |
| 6180 | Concho Oilfield Serv & Oper Co. | Eden, TX 76837 | Oil & Gas Operator | Sep 2026 |
| 6181 | Concho Oilfield Service, Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2013 |
| 6182 | Concho Petroleum | | Oil & Gas Operator | Dec 1994 |
| 6183 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 6184 | Concor Petroleum, Inc. | | Oil & Gas Operator | Feb 1983 |
| 6185 | Concord Energy, Inc. | Glen Rose, TX 76043 | Oil & Gas Operator | Sep 2026 |
| 6186 | Concord Operating Incorporated | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Dec 2008 |
| 6187 | Concord Resources, LLC | | Oil & Gas Operator | Nov 2000 |
| 6188 | Concorde Exploration, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 1994 |
| 6189 | Concorde Resources Corporation | Eufaula, OK 74432 | Oil & Gas Operator | Jan 2026 |
| 6190 | Concordia Resources Inc. | | Oil & Gas Operator | Dec 2025 |
| 6191 | Condor Energy | | Oil Operator | Aug 1995 |
| 6192 | Condor Energy, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Nov 2019 |
| 6193 | Condor Exploration LLC | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Sep 2009 |
| 6194 | Condor Oil Company Inc. | | Oil & Gas Operator | Dec 2000 |
| 6195 | Condor Oil Corp | Boulder, CO 80303 | Oil & Gas Operator | Dec 1994 |
| 6196 | Condor Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 6197 | Condor Operating Company, LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 6198 | Condor Petroleum | | Oil & Gas Operator | Nov 1990 |
| 6199 | Condor Petroleum Corporation | | Oil & Gas Operator | Aug 2020 |
| 6200 | Condor Petroleum, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |