| 6101 | Collins, Dave | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2023 |
| 6102 | Collins, David A And Cole, Alexander B. | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2023 |
| 6103 | Collins, Paul | Big Springs, WV 26137-0000 | Oil & Gas Operator | Dec 2021 |
| 6104 | Collins-McGregor Operating Company | Marietta, OH 45750 | Oil & Gas Operator | Dec 2023 |
| 6105 | Colo Construction Co., Inc. | Abilene, TX 79602 | Oil Operator | Apr 2004 |
| 6106 | Colo Exploration Company, Inc. | Benbrook, TX 76126 | Oil & Gas Operator | Nov 2024 |
| 6107 | Cologne Production Company | San Antonio, TX 78209 | Oil & Gas Operator | Nov 2014 |
| 6108 | Colonial Corporation | St Simons Island, GA 31522 | Oil & Gas Operator | Dec 2000 |
| 6109 | Colonial Energy Company Inc | Garland, TN 75045 | Oil & Gas Operator | Apr 2015 |
| 6110 | Colonial Resources LLC | Edmond, OK 73003-3207 | Oil & Gas Operator | Aug 2019 |
| 6111 | Colorado Bluebonnet Energy Corp. | Englewood, CO 80112 | Oil & Gas Operator | Feb 2001 |
| 6112 | Colorado Crude E | | Oil Operator | Jan 1986 |
| 6113 | Colorado Drilling Company | Grand Junction, CO 81501 | Oil Operator | Jan 1990 |
| 6114 | Colorado Energy Minerals Inc | | Oil Operator | Dec 2010 |
| 6115 | Colorado Gas Compression Inc | Longmont, CO 80501-5868 | Oil & Gas Operator | Aug 2013 |
| 6116 | Colorado Interstate Gas Co | Colorado Springs, CO 80944 | Oil & Gas Operator | Jul 2004 |
| 6117 | Colorado Interstate Gas Company LLC | Colorado Springs, CO 80944 | Oil & Gas Operator | Sep 2024 |
| 6118 | Colorado Oil & G | | Oil & Gas Operator | Oct 1987 |
| 6119 | Colorado Oil & Gas Corporation | | Oil & Gas Operator | May 2003 |
| 6120 | Colorado Oil Co., Inc. | | Oil & Gas Operator | Dec 1977 |
| 6121 | Colorado Pica Petro Corp | Cortez, CO 81321 | Oil & Gas Operator | Apr 2007 |
| 6122 | Colorado-Swanson Landing Oil & Gas, LLC | Kilgore, TX 75663 | Oil Operator | Nov 2024 |
| 6123 | Colotex Operating, LLC | Aurora, CO 80015 | Oil & Gas Operator | Nov 2024 |
| 6124 | Colpitt Brothers Oil | Collinsville, OK 74021 | Oil & Gas Operator | Apr 2020 |
| 6125 | Colpitt Brothers Operating Co | Collinsville, OK 74021 | Oil & Gas Operator | Aug 2024 |
| 6126 | Colpitt C H Drilling Co LLC | Collinsville, OK 74021-7107 | Oil Operator | Aug 2024 |
| 6127 | Colpitt Chas H Drilling Co | Collinsville, OK 74021-7105 | Oil & Gas Operator | Mar 2012 |
| 6128 | Colt Energy Inc | Iola, KS 66749 | Oil & Gas Operator | Jul 2024 |
| 6129 | Colt Energy Inco | | Oil & Gas Operator | Dec 1996 |
| 6130 | Colt Oil & Gas Co. | Abilene, TX 79601 | Oil Operator | Apr 2004 |
| 6131 | Colt Oil Company | Andrews, TX 79714 | Oil & Gas Operator | Feb 1996 |
| 6132 | Colt Oil Corporation | Smithville, WV 26178 | Oil & Gas Operator | Dec 2021 |
| 6133 | Colt Oil LLC | Sapulpa, OK 74066-1010 | Oil Operator | Jul 2024 |
| 6134 | Colt Production Corp. Inc. | | Oil & Gas Operator | Jul 1996 |
| 6135 | Colt Resources Corporation | Billings, MT 59103 | Oil & Gas Operator | Feb 2013 |
| 6136 | Colter Operating Co | Horseshoe Bay, TX 78654 | Oil & Gas Operator | Nov 1997 |
| 6137 | Coltharp, Edward H | | Oil & Gas Operator | Dec 1970 |
| 6138 | Colton Limited Liability Co | | Oil & Gas Operator | Sep 2023 |
| 6139 | Coltrane Charles | | Oil Operator | Dec 1980 |
| 6140 | Columbia Energy Properties, Inc. | Baytown, TX 77521 | Oil & Gas Operator | Jul 2004 |
| 6141 | Columbia Gas Dev. Corp. | | Oil & Gas Operator | Apr 1996 |
| 6142 | Columbia Gas Development | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 6143 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 6144 | Columbia Gas Trans LLC | Charleston, WV 25325-1273 | Gas Operator | Dec 1987 |
| 6145 | Columbia Gas Transmission, LLC | Charleston, WV 25314 | Oil & Gas Operator | Dec 2021 |
| 6146 | Columbia Gulf Transmission Co. | | Oil Operator | Dec 2014 |
| 6147 | Columbia Gulf Transmission Company, LLC | | Oil Operator | Jul 2024 |
| 6148 | Columbia Minerals Corp., Inc. | | Oil & Gas Operator | May 1996 |
| 6149 | Columbia Natural Res Inc | Charleston, WV 25362-0070 | Gas Operator | Dec 2008 |
| 6150 | Columbia Natural Resources, LLC | Charleston, WV 23502 | Oil & Gas Operator | Dec 2021 |
| 6151 | Columbia Oil Company, Inc | Guy, AR 72061 | Oil & Gas Operator | Mar 2024 |
| 6152 | Columbia Petrole | | Oil Operator | Sep 1988 |
| 6153 | Columbia Petroleum Corp. | | Oil & Gas Operator | Jun 1982 |
| 6154 | Columbia Petroleum LLC | Brookhaven, MS 39601 | Oil & Gas Operator | Jun 2024 |
| 6155 | Columbia Petroleum, LTD. | Farmington, UT 84025 | Oil Operator | Aug 2024 |
| 6156 | Columbia Production Company | Edmond, OK 73083 | Oil & Gas Operator | May 2020 |
| 6157 | Columbian Production Corporation | Topeka, KS 66601 | Oil Operator | Oct 1999 |
| 6158 | Columbian Servic | | Oil & Gas Operator | Nov 1993 |
| 6159 | Columbian Services C | | Oil Operator | Jan 1992 |
| 6160 | Columbian Services Corporation | Topeka, KS 66603 | Gas Operator | Dec 2009 |
| 6161 | Columbine Associates | | Oil & Gas Operator | Sep 2024 |
| 6162 | Columbine Exploration Corp | Englewood, CO 80111 | Oil & Gas Operator | Aug 1998 |
| 6163 | Columbus Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 6164 | Columbus Energy, LLC | Houston, TX 77046 | Oil & Gas Operator | Nov 2024 |
| 6165 | Columbus III Production LC | | Oil Operator | Oct 2003 |
| 6166 | Columbus Oil And Gas LLC | | Oil Operator | Oct 2020 |
| 6167 | Columbus Oil Company | Seminole, OK 74868 | Oil & Gas Operator | Sep 2024 |
| 6168 | Columbus Oilfield Explor Co | Powell, OH 43065-9315 | Gas Operator | Dec 2004 |
| 6169 | Columbus Oilfield Exploration Company | Columbus, OH 43220 | Oil & Gas Operator | Dec 2013 |
| 6170 | Columbus Production Inc | | Oil & Gas Operator | Mar 2005 |
| 6171 | Comac Well Service, Inc. | Borger, TX 79008 | Oil & Gas Operator | Mar 2008 |
| 6172 | Comal Operating LLC | San Antonio, TX 78217 | Oil & Gas Operator | Nov 2024 |
| 6173 | Comanche Drilling Company | Cut Bank, MT 59427 | Oil & Gas Operator | Jun 2024 |
| 6174 | Comanche Exploration Co LLC | Oklahoma City, OK 73116-7334 | Oil & Gas Operator | Sep 2024 |
| 6175 | Comanche Exploration Company | Oklahoma City, OK 73120-2797 | Oil & Gas Operator | Feb 2007 |
| 6176 | Comanche Oil & Gas Corp | Salt Lake City, UT 84107-3075 | Oil & Gas Operator | May 2005 |
| 6177 | Comanche Oil & Service LLC | Hominy, OK 73035 | Oil Operator | Sep 2024 |
| 6178 | Comanche Oil And Gas Company | Brownwood, TX 76801 | Oil & Gas Operator | Nov 2024 |
| 6179 | Comanche Operating Co. | Oklahoma City, OK 73120 | Oil & Gas Operator | Aug 2002 |
| 6180 | Comanche Petroleum Corporation | Norman, OK 73072 | Oil & Gas Operator | Apr 2024 |
| 6181 | Comanche Product | | Oil & Gas Operator | Jan 1992 |
| 6182 | Comanche Production Co | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 1998 |
| 6183 | Comanche Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2006 |
| 6184 | Comanche Resources Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Sep 2024 |
| 6185 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | Nov 2024 |
| 6186 | Combest A L | Purcell, OK 73080-6829 | Oil & Gas Operator | Aug 2021 |
| 6187 | Combined Oil & Gas | Denver, CO 80202 | Oil & Gas Operator | Feb 1990 |
| 6188 | Combined Resources Corporation | Edmond, OK 73083 | Oil & Gas Operator | Nov 2024 |
| 6189 | Combs Production LLC | Depew, OK 74028-0483 | Oil & Gas Operator | Aug 2024 |
| 6190 | Combs, Steven H | Corydon, KY 42406 | Oil Operator | Dec 2022 |
| 6191 | Comco Of Louisiana, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2000 |
| 6192 | Comdisco Exploration Inc | | Oil Operator | Dec 1990 |
| 6193 | Comdisco Resources Inc | | Oil Operator | Aug 2004 |
| 6194 | Comerica Properties Corp | | Oil Operator | May 1985 |
| 6195 | Comet Energy Services LLC | Traverse City, MI 49686 | Oil & Gas Operator | Oct 2011 |
| 6196 | Comet Oil & Gas, Inc. | Conroe, TX 77305 | Oil & Gas Operator | Nov 2024 |
| 6197 | Comet Oil Company | Velma, OK 73091 | Oil & Gas Operator | May 2005 |
| 6198 | Comet Production | Conroe, TX 77305 | Oil Operator | Nov 2024 |
| 6199 | Comet-Haines Oil Company | Sulphur, OK 73086-0546 | Oil & Gas Operator | Mar 2013 |
| 6200 | Cometra Oil And Gas, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 1997 |