| 7101 | Crystal Exploration & Production Company | Shreveport, LA 71120 | Oil & Gas Operator | Feb 1995 |
| 7102 | Crystal Exploration Co | | Oil & Gas Operator | Dec 2009 |
| 7103 | Crystal Gas, L.L.C. | | Oil & Gas Operator | Apr 2000 |
| 7104 | Crystal Oil And Land Company | | Oil & Gas Operator | May 1992 |
| 7105 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 7106 | Crystal River Oil & Gas LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2023 |
| 7107 | Csa Exploration Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Aug 2003 |
| 7108 | Csapo Limited | Creston, OH 44217 | Oil & Gas Operator | Dec 2012 |
| 7109 | CSC Energy Corp. | | Oil & Gas Operator | Dec 2009 |
| 7110 | CSC, Inc. | | Oil Operator | Jan 2000 |
| 7111 | CSD IV Oil LLC | Columbus, OH 43209 | Oil Operator | Dec 2024 |
| 7112 | CSL Exploration, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2018 |
| 7113 | CSM, Inc. | | Gas Operator | Oct 1990 |
| 7114 | Cso Consulting | Bridgeport, TX 76426 | Oil & Gas Operator | Mar 2020 |
| 7115 | Csoda Operating Company LLC | Amarillo, TX 79114-7506 | Oil & Gas Operator | Aug 2021 |
| 7116 | CSV Holdings, Inc. | | Oil & Gas Operator | Dec 2014 |
| 7117 | CSX Oil & Gas Corporation | Houston, TX 77210-4326 | Oil & Gas Operator | Mar 1993 |
| 7118 | CT Adams Jr., LLC | Schulenburg, TX 78956 | Oil Operator | Feb 2026 |
| 7119 | CTC Oil Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 7120 | Cti Associates | | Gas Operator | Jan 1990 |
| 7121 | CTL Oil & Gas Corporation | Buchanan Dam, TX 78609 | Oil & Gas Operator | Nov 2020 |
| 7122 | CTL Production, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Feb 2026 |
| 7123 | CTR 247 LLC | Peru, KS 67360 | Oil Operator | Jul 2025 |
| 7124 | CTR Petroleum, Inc. | Corpus Chrsti, TX 78414 | Oil & Gas Operator | Mar 2015 |
| 7125 | CTX Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Aug 2003 |
| 7126 | Cuatro Oil And Gas Corporation | Abilene, TX 79603 | Oil & Gas Operator | Feb 2026 |
| 7127 | Cuatro Petro Corp. | Richardson, TX 75080 | Oil & Gas Operator | Feb 2026 |
| 7128 | Cub Creek Energy LLC | | Oil & Gas Operator | Mar 2019 |
| 7129 | Cuba, John H. | Olney, TX 76374 | Oil Operator | Feb 2026 |
| 7130 | Cucharas Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Dec 2000 |
| 7131 | Cudd Operating Corp | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2020 |
| 7132 | Cuervo Resources, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | Oct 1996 |
| 7133 | Cuervo, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | Feb 2026 |
| 7134 | Cuesta Petroleum Inc | Shawnee, OK 74801-6963 | Oil & Gas Operator | Oct 2025 |
| 7135 | Culbreath Oil & Gas Co Inc | Tulsa, OK 74135 | Oil & Gas Operator | Nov 2025 |
| 7136 | Culebra Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Dec 2000 |
| 7137 | Culebra Oil & Gas, LLC | Kerrville, TX 78028 | Oil & Gas Operator | Feb 2026 |
| 7138 | Cullen Corporati | | Oil & Gas Operator | Jan 1993 |
| 7139 | Cullison, Jimmie I. | Moscow, KS 67952 | Oil Operator | Apr 2002 |
| 7140 | Culoco, Inc. | Dallas, TX 75374 | Oil & Gas Operator | Nov 2024 |
| 7141 | Culp & Copple Oil Company | Cushing, OK 74023 | Oil & Gas Operator | Aug 2025 |
| 7142 | Culver & Cain Production LLC | Tyler, TX 75711 | Oil & Gas Operator | Feb 2026 |
| 7143 | Culver & Grounds | | Oil & Gas Operator | Nov 1995 |
| 7144 | Culver & Grounds Oil Properties, Inc. | McPherson, KS 67460 | Oil Operator | Sep 2025 |
| 7145 | Cumberland Exploration | Cleveland, OH 44111 | Oil & Gas Operator | Dec 1985 |
| 7146 | Cumberland Gas Co.(Tree Preservation Co) | | Oil & Gas Operator | Dec 1996 |
| 7147 | Cumberland Harlan Expl Corp | Barbourville, KY 40906 | Oil & Gas Operator | Dec 2023 |
| 7148 | Cumberland Operating Company | Seminole, OK 74868-1258 | Oil & Gas Operator | Mar 2007 |
| 7149 | Cumberland Operating LLC | Cody, WY 82414 | Oil & Gas Operator | Oct 2025 |
| 7150 | Cumberland Petroleum, Inc. II | Weatherford, TX 76086 | Oil & Gas Operator | May 1997 |
| 7151 | Cumberland River Oil & Gas, Inc | Williamsburg, KY 40769 | Oil & Gas Operator | Dec 2023 |
| 7152 | Cumberland Valley Resources, LLC | Louisville, KY 40204 | Oil & Gas Operator | Dec 2023 |
| 7153 | Cumming Company, Inc. The | Fort Worth, TX 76116 | Oil & Gas Operator | Feb 2026 |
| 7154 | Cummings Gene | | Oil Operator | Dec 2000 |
| 7155 | Cummings Oil & Cattle | Ada, OK 74820-0994 | Oil Operator | Jan 2017 |
| 7156 | Cummings Oil Company | Oklahoma City, OK 73112-6113 | Oil & Gas Operator | Nov 2025 |
| 7157 | Cummings, C. M. Oil & Gas | Lewisville, TX 75029 | Oil & Gas Operator | Nov 1993 |
| 7158 | Cummins & Walker Oil Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2021 |
| 7159 | Cummins Wren Oil Company | Tulsa, OK 74135 | Oil & Gas Operator | Nov 1998 |
| 7160 | Cundiff Harold | Perkins, OK 74059-4199 | Oil & Gas Operator | Apr 2025 |
| 7161 | Cundiff Jack | Perkins, OK 74059-4198 | Oil & Gas Operator | Apr 2014 |
| 7162 | Cundiff Operating Company | Dallas, TX 75238 | Oil & Gas Operator | Feb 2026 |
| 7163 | Cunningham Crude, A General Partnership | Independence, KS 67301 | Oil Operator | Sep 2025 |
| 7164 | Cunningham Energy LLC | Charleston, WV 25302 | Oil & Gas Operator | Dec 2021 |
| 7165 | Cunningham, Melvin | Medicine Lodge, KS 67104 | Oil Operator | Jan 2013 |
| 7166 | Cur-Ric Petrol & Gas Corp | Las Vegas, NV 89120-4003 | Oil Operator | Dec 1985 |
| 7167 | Curmar Producers | Adairsville, GA 30103 | Oil Operator | Mar 2008 |
| 7168 | Curn Lisa | Steubenville, OH 43952-2535 | Oil Operator | Oct 2025 |
| 7169 | Curran Oil Co | Great Falls, MT 59401 | Gas Operator | May 2001 |
| 7170 | Currie Cattle Co. | Big Spring, TX 79720 | Oil & Gas Operator | Sep 2007 |
| 7171 | Currie, V. Monta, Jr. | | Gas Operator | Nov 1990 |
| 7172 | Curry Oil | | Oil Operator | May 2005 |
| 7173 | Curry R D Production Co | Memphis, TN 38103 | Oil & Gas Operator | Dec 1986 |
| 7174 | Curry, Gregg | Madison, KS 66860 | Oil Operator | Sep 2025 |
| 7175 | Curt Weaver Et Al | | Oil Operator | Apr 1982 |
| 7176 | Curt'S Oil Opera | | Oil Operator | Nov 1994 |
| 7177 | Curt'S Oil Operation, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Sep 2025 |
| 7178 | Curtis & Son Oil Inc | Sugar Grove, PA 16350 | Oil & Gas Operator | Dec 2024 |
| 7179 | Curtis Beard & Huston P. Ganey | | Oil Operator | Mar 1987 |
| 7180 | Curtis F. Adams | | Oil & Gas Operator | Oct 2024 |
| 7181 | Curtis Hankamer | Houston, TX 77024 | Oil & Gas Operator | Jun 1997 |
| 7182 | Curtis J Little | Farmington, NM 87499 | Oil & Gas Operator | Aug 2005 |
| 7183 | Curtis Oil Inc | Duke Center, PA 16729-0287 | Oil & Gas Operator | Dec 2024 |
| 7184 | Curzac Oil And Gas, LLC | Plano, TX 75075 | Oil & Gas Operator | Feb 2026 |
| 7185 | Curzon Operating Company LTD | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Oct 2025 |
| 7186 | Custer & Wright Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 7187 | Custer K. Primos | | Oil & Gas Operator | Oct 2002 |
| 7188 | Custom Oil Explo | | Oil & Gas Operator | May 1992 |
| 7189 | Custom Service LLC | St John, KS 67576 | Oil Operator | Sep 2025 |
| 7190 | Cut Bank Gas Company | Cut Bank, MT 59427 | Gas Operator | May 2025 |
| 7191 | Cut Through Hydrocarbon | Florence, KY 41042 | Gas Operator | Dec 2019 |
| 7192 | Cutbow Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 7193 | Cutler Oil, LLC | Rantoul, KS 66079 | Oil Operator | Sep 2025 |
| 7194 | Cutter Exploration Inc | Oviedo, FL 32765 | Oil & Gas Operator | Dec 2024 |
| 7195 | Cutter Oil Company | West Salem, OH 44287 | Oil & Gas Operator | Dec 2018 |
| 7196 | Cutter Oil LLC | West Salem, OH 44287 | Oil & Gas Operator | Dec 2024 |
| 7197 | Cuyahoga Expl & Develop | Marietta, OH 45750 | Oil & Gas Operator | Dec 1986 |
| 7198 | Cuyahoga Expl. & Devel. Corp. | Jericho, NY 11753 | Oil & Gas Operator | Dec 1996 |
| 7199 | CVR Supply & Trading, LLC | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2024 |
| 7200 | CVS Operating, LLC. | Plano, TX 75074 | Oil & Gas Operator | Feb 2026 |