| 6101 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 6102 | Coastal Oils Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2013 |
| 6103 | Coastal Petro Corp | Oil City, PA 16301-6327 | Oil & Gas Operator | Jul 2018 |
| 6104 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2025 |
| 6105 | Coastal Plains Exploration, LLC | Port Lavaca, TX 77979 | Oil & Gas Operator | May 2025 |
| 6106 | Coastal Production Company, Inc. | El Campo, TX 77437 | Oil & Gas Operator | Aug 1995 |
| 6107 | Coastal Production Inc. | | Oil & Gas Operator | Aug 2000 |
| 6108 | Coastal Shoreline Corp. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Aug 2003 |
| 6109 | Coastal States & Emerald Oil | | Oil & Gas Operator | Dec 1979 |
| 6110 | Coastal States Gas Prod. Co. | | Oil & Gas Operator | Jun 1996 |
| 6111 | Coastland Operations, LLC | Dallas, TX 75287 | Oil & Gas Operator | May 2025 |
| 6112 | Coastline Exploration, Inc. | Stafford, TX 77477 | Oil & Gas Operator | May 2025 |
| 6113 | Coastline Operating, L.L.C. | Houston, TX 77027 | Oil & Gas Operator | Dec 2006 |
| 6114 | Coates Energy Interests, LTD. | San Antonio, TX 78217 | Oil & Gas Operator | Aug 1997 |
| 6115 | Coates Energy Trust | San Antonio, TX 78209 | Oil & Gas Operator | Aug 2008 |
| 6116 | Coats Energy, Inc. | Wichita, KS 67201 | Oil & Gas Operator | Jan 2025 |
| 6117 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Jan 2025 |
| 6118 | Cobalt Environmental Solutions LLC | Oklahoma City, OK 73101-0249 | Oil Operator | Jun 2019 |
| 6119 | Cobalt Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2025 |
| 6120 | Cobb, E M | Henderson, KY 42420 | Oil Operator | Dec 2022 |
| 6121 | Cobb, Maurice W | | Oil Operator | Dec 2023 |
| 6122 | Cobb, Maurice W Dba M W C Oil Co | Eddyville, KY 42038 | Oil Operator | Dec 2022 |
| 6123 | Cobbs Brothers Oil & Gas | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Jun 2009 |
| 6124 | Cobham Gas Industries, Inc. | | Oil & Gas Operator | Dec 2006 |
| 6125 | Cobopco Inc | Tulsa, OK 74103-4391 | Oil & Gas Operator | Feb 1997 |
| 6126 | Cobra Oil & Gas | | Oil & Gas Operator | Jul 1995 |
| 6127 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 6128 | Cobra Operating Company | Houston, TX 77002 | Oil & Gas Operator | Sep 2003 |
| 6129 | Cobra Petroleum Production Corp | | Oil & Gas Operator | Dec 2018 |
| 6130 | Cobra Resources LLC | N Jackson, OH 44451 | Oil & Gas Operator | Dec 2024 |
| 6131 | Cobra-Lyons-Hilliard-Watson | | Oil & Gas Operator | Jun 1992 |
| 6132 | Cochise Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 6133 | Cochon Properties, LLC | | Oil & Gas Operator | Aug 2016 |
| 6134 | Cochran Industrial Corporation | Cushing, OK 74023-1427 | Oil & Gas Operator | Apr 2001 |
| 6135 | Cochrane Resources Inc | Roosevelt, UT 84066 | Oil & Gas Operator | Apr 2025 |
| 6136 | Cockburn Oil Corporation | Lubbock, TX 79493 | Oil & Gas Operator | Jul 2005 |
| 6137 | Cockrell Oil Corporation | Houston, TX 77002-7348 | Oil & Gas Operator | Feb 2001 |
| 6138 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | May 2025 |
| 6139 | Cockriel Petroleum | | Oil & Gas Operator | Dec 1993 |
| 6140 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 6141 | Cody & Krysti Hunsperger | Osawatomie, KS 66064 | Oil Operator | Mar 2024 |
| 6142 | Cody C. Beasley | | Oil & Gas Operator | Apr 1987 |
| 6143 | Cody Company | Amarillo, TX 79121 | Oil & Gas Operator | Mar 2020 |
| 6144 | Cody Energy LLC | Houston, TX 77024 | Oil & Gas Operator | Jun 2020 |
| 6145 | Cody Energy, Inc. | Houston, TX 77077 | Oil & Gas Operator | Mar 2025 |
| 6146 | Cody Operating, Inc. | | Oil & Gas Operator | Mar 2025 |
| 6147 | Cody Resources, Inc. | Midland, TX 79705 | Oil & Gas Operator | Sep 2002 |
| 6148 | Cody, Ken L. | Longton, KS 67352 | Oil & Gas Operator | Dec 2024 |
| 6149 | Cody, Nancy M. | Fredonia, KS 66736 | Oil Operator | Jun 1998 |
| 6150 | Cody, Patricia H | | Oil & Gas Operator | Nov 2007 |
| 6151 | Coe Production Company | Talala, OK 74080-0264 | Oil & Gas Operator | Aug 2015 |
| 6152 | Coe Production Company LLC | Talala, OK 74080 | Oil Operator | Feb 2025 |
| 6153 | Coelho & Case Oil Company | | Oil & Gas Operator | Dec 1997 |
| 6154 | Coen Energy | | Oil Operator | Mar 1995 |
| 6155 | Coen Energy Corporation | Overland Park, KS 66221 | Oil Operator | Jan 2025 |
| 6156 | Coenergy Operating Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 6157 | Coert Holdings 1 LLC | Greenwich, CT 06830 | Oil & Gas Operator | Dec 2021 |
| 6158 | Cofer & Co LLC | Hobbs, NM 88240 | Oil & Gas Operator | Jan 2025 |
| 6159 | Cofer & Crawford | Pampa, TX 79066 | Oil & Gas Operator | May 2025 |
| 6160 | Coffee Petroleum | | Oil & Gas Operator | Mar 2025 |
| 6161 | Coffman Oil & Gas | | Oil & Gas Operator | Dec 1999 |
| 6162 | Coffman Oil & Real Estate Inc | Newport Beach, CA 92661 | Oil Operator | Dec 2022 |
| 6163 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 6164 | COG Petroleum Corporation | Oklahoma City, OK 73116-7326 | Oil & Gas Operator | Mar 2019 |
| 6165 | COG Production LLC | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 6166 | Cohen & Kosovitz | | Oil & Gas Operator | May 1998 |
| 6167 | Coho Louisiana Production Co | | Gas Operator | Dec 1998 |
| 6168 | Coho Oil & Gas Inc | Coppell, TX 75019-8288 | Oil & Gas Operator | Mar 2015 |
| 6169 | Coho Resources Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 2002 |
| 6170 | Cohort Energy Company | Centennial, CO 80112 | Oil & Gas Operator | Feb 2007 |
| 6171 | Cokan Resources | Colby, KS 67701 | Oil Operator | Aug 1994 |
| 6172 | Coker Oil Company | Duncan, OK 73533-0818 | Oil Operator | Jan 2014 |
| 6173 | Coker, Jonathan C., Inc. | Austin, TX 78746 | Oil Operator | Mar 2011 |
| 6174 | Coker, Nel Rey Daws | Throckmorton, TX 76483 | Oil & Gas Operator | Mar 2008 |
| 6175 | Coker, Tom | Seymour, TX 76380 | Oil & Gas Operator | Sep 2006 |
| 6176 | Cokinos, Inc. | Beaumont, TX 77701 | Oil & Gas Operator | Aug 2003 |
| 6177 | Col-Kan Developm | | Oil & Gas Operator | Jan 1995 |
| 6178 | Col-Kan Development, Inc. | Russell, KS 67665 | Oil Operator | Jul 2005 |
| 6179 | Cola Resources LLC | Houston, TX 77019-5639 | Gas Operator | Nov 2015 |
| 6180 | Colby Production Resources, LLC | Granbury, TX 76048 | Oil Operator | May 2025 |
| 6181 | Coldren Oil & Gas Inc | Bartlesville, OK 74006-4729 | Oil & Gas Operator | Sep 1998 |
| 6182 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 6183 | Cole, John Otis | Big Spring, TX 79721 | Oil & Gas Operator | Jan 1999 |
| 6184 | Coleman & Johnson Oil Company | Brownwood, TX 76801 | Oil & Gas Operator | May 2025 |
| 6185 | Coleman County Project | Coleman, TX 76834 | Oil & Gas Operator | Oct 2012 |
| 6186 | Coleman Oil & Gas Corp. | Fort Worth, TX 76109 | Oil & Gas Operator | May 2025 |
| 6187 | Coleman Oil & Gas Inc | Farmington, NM 87499 | Oil & Gas Operator | Jan 2023 |
| 6188 | Coleman Oil Company | Bartlesville, OK 74003 | Oil Operator | Dec 2024 |
| 6189 | Coleman Oil LLC | Marlow, OK 73055 | Oil Operator | Nov 2021 |
| 6190 | Coleman Production | Stroud, OK 74079-9609 | Oil & Gas Operator | May 2013 |
| 6191 | Coleman, C R | | Gas Operator | Dec 2007 |
| 6192 | Colemanite, Inc. | Abilene, TX 79606 | Oil & Gas Operator | May 2025 |
| 6193 | Coleville Petroleum Company | McAllen, TX 78503 | Oil & Gas Operator | Mar 1996 |
| 6194 | Coley, H. B. | Corsicana, TX 75110 | Oil & Gas Operator | Oct 2000 |
| 6195 | Coley, Thomas | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 6196 | Colgate Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 6197 | Colgrade Investment Corp. | | Oil Operator | Apr 2004 |
| 6198 | Collet Oil Ventures, Inc. | Denver, CO 80217 | Oil & Gas Operator | Jun 2004 |
| 6199 | Collier Oil Field Services Inc | Iowa Park, TX 76367 | Oil & Gas Operator | May 2025 |
| 6200 | Collier Oil Prop | | Oil Operator | Apr 1987 |