| 101 | C. J. Services | | Oil & Gas Operator | Sep 2016 |
| 102 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2026 |
| 103 | Cad Energy Corporation | Creston, WV 26141 | Oil & Gas Operator | Dec 2021 |
| 104 | Cain, Francis E. | Big Bend, WV 26136-0080 | Oil & Gas Operator | Dec 2021 |
| 105 | Cain, Milton | Big Bend, WV 26136-0008 | Oil & Gas Operator | Dec 2021 |
| 106 | Cameron Oil & Gas Company | | Gas Operator | Dec 2016 |
| 107 | Cane Creek Energy, LLC | Charleston, WV 25314 | Oil & Gas Operator | Dec 2021 |
| 108 | Capital Energy, LLC | Ripley, WV 25271 | Oil & Gas Operator | Dec 2021 |
| 109 | Cardinal Energy | | Oil & Gas Operator | Dec 2008 |
| 110 | Carnegie Production Co | Charleston, WV 25328 | Oil & Gas Operator | Dec 2017 |
| 111 | Carter Oil And Gas Inc | Richmond, VA 23219 | Oil & Gas Operator | Dec 2011 |
| 112 | Castle Gas Company Inc | Pittsburgh, PA 15236-2466 | Oil & Gas Operator | Dec 2007 |
| 113 | Catamount Resources, Inc. | Grafton, WV 26354-0000 | Gas Operator | Dec 2009 |
| 114 | CDX Gas, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2009 |
| 115 | Cenestia Energy Inc | | Oil & Gas Operator | Dec 1998 |
| 116 | Central Pacific Group, Inc. | | Oil & Gas Operator | Dec 2003 |
| 117 | Century Mining, LLC | | Gas Operator | Dec 2021 |
| 118 | CG&G Oil LLC | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2021 |
| 119 | Charity Gas, Inc. | Salem, WV 26426-5554 | Oil & Gas Operator | Dec 2021 |
| 120 | Chase Petroleum, Inc. | Glenville, WV 26351-1026 | Oil & Gas Operator | Dec 2021 |
| 121 | Chastain Farms LLC | Guthrie, KY 42234 | Oil & Gas Operator | Mar 2020 |
| 122 | Chesapeake Appalachia, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2025 |
| 123 | Chestnut Ridge Storage LLC | San Diego, CA 92121-1008 | Gas Operator | Dec 2025 |
| 124 | Chevron Appalachia, LLC | Corapolis, PA 15108 | Oil & Gas Operator | Jul 2020 |
| 125 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 126 | Chisler Brothers Contracting Limited Liability Company | Pentress, WV 26544-0000 | Oil & Gas Operator | Dec 2021 |
| 127 | Chisler, F. M. | Clemmons, NC 27012 | Oil & Gas Operator | Jul 2021 |
| 128 | Chris Oil Co | Cambridge, OH 43725 | Oil & Gas Operator | Nov 2008 |
| 129 | Chrisman Drilling Co. | Pennsboro, WV 26415 | Oil & Gas Operator | Dec 2021 |
| 130 | Clark, Donald E. | | Gas Operator | Dec 2003 |
| 131 | Clark, N.G. Dba Glenn, Inc | | Oil & Gas Operator | Dec 2021 |
| 132 | Classic Oil & Gas Resources Inc | | Gas Operator | Dec 2008 |
| 133 | Clear Creek Energy LLC | | Oil & Gas Operator | Dec 2021 |
| 134 | Clear Fork Gas Company | Albany, TX 76430 | Oil & Gas Operator | Apr 2026 |
| 135 | Clem Energy LLC | | Oil & Gas Operator | Dec 2021 |
| 136 | Clowser Well Service, Inc. | | Oil & Gas Operator | Dec 2021 |
| 137 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 138 | CNX Gas Company LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Feb 2026 |
| 139 | Cobham Gas Industries, Inc. | | Oil & Gas Operator | Dec 2006 |
| 140 | Cody, Patricia H | | Oil & Gas Operator | Nov 2007 |
| 141 | Coffman Oil & Gas | | Oil & Gas Operator | Dec 1999 |
| 142 | Coleman, C R | | Gas Operator | Dec 2007 |
| 143 | Collins, Paul | Big Springs, WV 26137-0000 | Oil & Gas Operator | Dec 2021 |
| 144 | Collins-McGregor Operating Company | Marietta, OH 45750 | Oil & Gas Operator | Dec 2025 |
| 145 | Columbia Gas Transmission, LLC | Charleston, WV 25314 | Oil & Gas Operator | Dec 2021 |
| 146 | Columbia Natural Resources, LLC | Charleston, WV 23502 | Oil & Gas Operator | Dec 2021 |
| 147 | Commonwealth Energy, Inc. | Weston, WV 26452-0000 | Oil & Gas Operator | Dec 2021 |
| 148 | Conquest Petroleum Inc | | Oil & Gas Operator | Nov 2014 |
| 149 | Consol Gas Company | Canonsburg, PA 15317 | Oil & Gas Operator | Dec 2021 |
| 150 | Consolidation Coal Company | Saint Clairsville, OH 43950-8742 | Oil & Gas Operator | Dec 2020 |
| 151 | Continental Petroleum, LLC | | Oil & Gas Operator | Oct 2013 |
| 152 | Core Appalachia Operating LLC | Charleston, WV 25362 | Oil & Gas Operator | Dec 2024 |
| 153 | Core Solutions LLC | | Oil & Gas Operator | Dec 2021 |
| 154 | Cotiga Development Company, Limited Partnership | Williamson, WV 25661-0000 | Oil & Gas Operator | Dec 2021 |
| 155 | Cow Run LTD Liability Company | Davidson, NC 28036 | Oil & Gas Operator | Nov 2018 |
| 156 | Creston Oil Corporation | Jacksonville, FL 32225-3869 | Oil & Gas Operator | Dec 2021 |
| 157 | Cumberland Gas Co.(Tree Preservation Co) | | Oil & Gas Operator | Dec 1996 |
| 158 | Cunningham Energy LLC | Charleston, WV 25302 | Oil & Gas Operator | Dec 2021 |
| 159 | Cyrus, Wade T | Fort Gay, WV 25574 | Oil & Gas Operator | Dec 2013 |
| 160 | D & D Energy Inc | Sapulpa, OK 74066-8734 | Oil & Gas Operator | May 2013 |
| 161 | D & N Operating Corp | Belpre, OH 45714-8181 | Oil & Gas Operator | Dec 2019 |
| 162 | D & R Energy | Spencer, WV 25276-0000 | Oil & Gas Operator | Dec 2021 |
| 163 | D W Energy, LLC | Dunbar, WV 25064 | Oil & Gas Operator | Dec 2021 |
| 164 | D. C. Malcolm, Inc. | Charleston, WV 25301 | Oil & Gas Operator | Dec 2021 |
| 165 | D. G. Haney, Inc. | Charleston, WV 25338-3810 | Oil & Gas Operator | Dec 2021 |
| 166 | Dale, David Dba DD Oil Company | Spencer, WV 25276-0406 | Oil & Gas Operator | Dec 2021 |
| 167 | Dart Oil & Gas Corporation | Mason, MI 48854 | Oil & Gas Operator | Jun 2018 |
| 168 | Davco Drilling Co. | | Gas Operator | Dec 2001 |
| 169 | Davisson, Ancil | | Oil & Gas Operator | Oct 2001 |
| 170 | Deem, J. F. Oil & Gas, LLC | Parkersburg, WV 26104 | Oil & Gas Operator | Dec 2021 |
| 171 | Deem, W. A. | Harrisville, WV 26362-7878 | Oil & Gas Operator | Dec 2001 |
| 172 | Deep Ford Gas Company | Charleston, WV 25321-0169 | Gas Operator | Dec 2021 |
| 173 | Denex Petroleum Corp. | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 174 | Deran Resources, Inc. | Spencer, WV 25276 | Oil & Gas Operator | Dec 2021 |
| 175 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 176 | Devonian Gas Production, Inc. | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 177 | Dickey Energy Company | Grafton, WV 26354 | Gas Operator | Dec 2015 |
| 178 | Dils, Sherman III Dba Dils Oil & Gas | | Oil & Gas Operator | Dec 2020 |
| 179 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Apr 2026 |
| 180 | Diversified Resources, Inc. | Jackson Center, PA 16133 | Oil & Gas Operator | Dec 2020 |
| 181 | Dixie Natural Gas Co. | | Oil & Gas Operator | Dec 2002 |
| 182 | Dodd Oil & Gas | Spencer, WV 25276 | Oil & Gas Operator | Dec 2021 |
| 183 | Dodd, C. C., Oil & Gas | | Oil & Gas Operator | Dec 2021 |
| 184 | Dolphin Energy LLC | Lake Worth, FL 33467 | Oil & Gas Operator | Dec 2025 |
| 185 | Dominion Energy Transmission, Inc. | | Oil & Gas Operator | Dec 2019 |
| 186 | Dominion Exploration & Production Inc | Houston, TX 77060 | Oil & Gas Operator | Apr 2015 |
| 187 | Dorward Energy Corporation | Saint Petersburg, FL 33701-3255 | Oil & Gas Operator | Dec 2024 |
| 188 | Dri Operating Company | West Chester, PA 19382-0000 | Gas Operator | Dec 2008 |
| 189 | Durst Oil & Gas, Inc. | Point Pleasant, WV 25550 | Oil & Gas Operator | Dec 2021 |
| 190 | Dutch Ridge Gas Ventures, LLC | Charleston, WV 25339 | Oil & Gas Operator | Dec 2021 |
| 191 | Eagle Energy, Inc. | Moreland, KS 67650 | Oil & Gas Operator | Dec 2021 |
| 192 | East Resources, Inc. | Sewickley, PA 15143 | Oil & Gas Operator | Dec 2021 |
| 193 | Eastern American Energy Corp | | Oil & Gas Operator | Dec 2008 |
| 194 | Eastern Gas Transmission And Storage, Inc | | Oil & Gas Operator | Dec 2021 |
| 195 | Eastern States Oil & Gas, Inc. | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2020 |
| 196 | Ecological Energy, Inc. | Morgantown, WV 26507-0000 | Oil & Gas Operator | Dec 2021 |
| 197 | Ed Broome, Inc. | Glenville, WV 26351 | Oil & Gas Operator | Dec 2021 |
| 198 | Elahs Gas Co., Inc. | | Oil & Gas Operator | Dec 2021 |
| 199 | Elder Oil Co. | West Union, WV 26456 | Oil & Gas Operator | Dec 2021 |
| 200 | Elmore Production Services Inc | | Oil & Gas Operator | Dec 2008 |