| 201 | Deem, J. F. Oil & Gas, LLC | Parkersburg, WV 26104 | Oil & Gas Operator | Dec 2021 |
| 202 | Deem, W. A. | Harrisville, WV 26362-7878 | Oil & Gas Operator | Dec 2001 |
| 203 | Deep Ford Gas Company | Charleston, WV 25321-0169 | Gas Operator | Dec 2021 |
| 204 | Delta Producing Corporation | | Oil & Gas Operator | Dec 1996 |
| 205 | Denex Petroleum Corp. | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 206 | Deran Resources, Inc. | Spencer, WV 25276 | Oil & Gas Operator | Dec 2021 |
| 207 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 208 | Devonian Gas Production, Inc. | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 209 | Dickey Energy Company | Grafton, WV 26354 | Gas Operator | Dec 2015 |
| 210 | Dils, Sherman III Dba Dils Oil & Gas | | Oil & Gas Operator | Dec 2020 |
| 211 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Aug 2025 |
| 212 | Diversified Resources, Inc. | Jackson Center, PA 16133 | Oil & Gas Operator | Dec 2020 |
| 213 | Dixie Natural Gas Co. | | Oil & Gas Operator | Dec 2002 |
| 214 | Dodd Oil & Gas | Spencer, WV 25276 | Oil & Gas Operator | Dec 2021 |
| 215 | Dodd, C. C., Oil & Gas | | Oil & Gas Operator | Dec 2021 |
| 216 | Dolphin Energy LLC | Lake Worth, FL 33467 | Oil & Gas Operator | Mar 2025 |
| 217 | Dominion Energy Transmission, Inc. | | Oil & Gas Operator | Dec 2019 |
| 218 | Dominion Exploration & Production Inc | Houston, TX 77060 | Oil & Gas Operator | Apr 2015 |
| 219 | Donahue Pipeline Construction, Inc. | Branchland, WV 25506 | Gas Operator | Dec 2021 |
| 220 | Dorward Energy Corporation | Saint Petersburg, FL 33701-3255 | Oil & Gas Operator | Dec 2024 |
| 221 | Dri Operating Company | West Chester, PA 19382-0000 | Gas Operator | Dec 2008 |
| 222 | Duffield, Scott | | Gas Operator | Dec 2021 |
| 223 | Durst Oil & Gas, Inc. | Point Pleasant, WV 25550 | Oil & Gas Operator | Dec 2021 |
| 224 | Dutch Ridge Gas Ventures, LLC | Charleston, WV 25339 | Oil & Gas Operator | Dec 2021 |
| 225 | Eagle Energy, Inc. | Moreland, KS 67650 | Oil & Gas Operator | Dec 2021 |
| 226 | East Resources, Inc. | Sewickley, PA 15143 | Oil & Gas Operator | Dec 2021 |
| 227 | Eastern American Energy Corp | | Oil & Gas Operator | Dec 2008 |
| 228 | Eastern Gas Transmission And Storage, Inc | | Oil & Gas Operator | Dec 2021 |
| 229 | Eastern States Exploration Co. | | Gas Operator | Dec 2021 |
| 230 | Eastern States Oil & Gas, Inc. | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2020 |
| 231 | Ecological Energy, Inc. | Morgantown, WV 26507-0000 | Oil & Gas Operator | Dec 2021 |
| 232 | Ed Broome, Inc. | Glenville, WV 26351 | Oil & Gas Operator | Dec 2021 |
| 233 | Elahs Gas Co., Inc. | | Oil & Gas Operator | Dec 2021 |
| 234 | Elder Oil Co. | West Union, WV 26456 | Oil & Gas Operator | Dec 2021 |
| 235 | Elliott Land & Cattle Co., LLC | Waverly, WV 26184 | Gas Operator | Dec 2021 |
| 236 | Elmore Production Services Inc | | Oil & Gas Operator | Dec 2008 |
| 237 | Elvis Energy, LLC | Philippi, WV 26416 | Gas Operator | Dec 2021 |
| 238 | Emax Oil Company | Charlottesville, VA 22903-4973 | Oil & Gas Operator | Dec 2016 |
| 239 | Emco Energy, Inc. | Stephenson, VA 22656 | Gas Operator | Dec 2018 |
| 240 | Emma Gas Co | Man, WV 25635 | Gas Operator | Dec 2021 |
| 241 | Empire Oil & Gas, Inc. | Harrisville, WV 26362 | Oil & Gas Operator | Dec 2021 |
| 242 | Empire Oil Company | Coppell, TX 75019 | Oil & Gas Operator | Aug 2025 |
| 243 | Energex Oil & Gas Co. | | Oil Operator | Dec 2021 |
| 244 | Energy Contractors, Inc. | Canal Wincheste, OH 43110 | Oil & Gas Operator | Dec 2019 |
| 245 | Energy Corporation Of America | Charleston, WV 25311 | Oil & Gas Operator | Dec 2023 |
| 246 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 247 | Energy Production, Inc. | Canton, OH 44711 | Oil & Gas Operator | Dec 2021 |
| 248 | Energy Search Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2007 |
| 249 | Energy Unlimited Inc | | Oil & Gas Operator | Feb 2005 |
| 250 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Aug 2025 |
| 251 | Enervest Operating, L.L.C., A Limited Liability Company | | Oil & Gas Operator | Dec 2019 |
| 252 | Engler, Inc. | Harlingen, TX 78552-0000 | Gas Operator | Dec 2020 |
| 253 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2025 |
| 254 | Eqt Chap, LLC | Pittsburgh, PA 15222 | Oil & Gas Operator | Jun 2025 |
| 255 | Eqt Production Company | Pittsburg, PA 15222 | Oil & Gas Operator | Jun 2025 |
| 256 | Equitable Gas Company | Pittsburgh, PA 15212-5352 | Gas Operator | Dec 2013 |
| 257 | Equitable Production Company | Charleston, WV 25302 | Oil & Gas Operator | Dec 2007 |
| 258 | Equitrans, L. P. | Cannonsburg, PA 15317 | Oil & Gas Operator | Jul 2021 |
| 259 | Erp Environmental Fund, Inc. | | Gas Operator | Dec 2018 |
| 260 | Exco Resources (Pa), LLC | Dallas, TX 75251-2224 | Oil & Gas Operator | Jun 2025 |
| 261 | Exco Resources (WV), Inc. | | Oil & Gas Operator | Dec 2020 |
| 262 | Factor, J. S. Pridmore | Spencer, WV 25276-0000 | Gas Operator | Dec 2017 |
| 263 | Farr Enterprises Inc | West Union, WV 24656 | Oil & Gas Operator | Dec 2021 |
| 264 | Fluharty Enterprises Inc | Bridgeport, WV 25338 | Oil & Gas Operator | Oct 2021 |
| 265 | FMC Corporation | Green River, WY 82935 | Oil & Gas Operator | Dec 2008 |
| 266 | Fola Land Company Inc | | Gas Operator | Dec 2003 |
| 267 | Four Leaf Land Company | West Union, WV 26456-0000 | Oil & Gas Operator | Dec 2021 |
| 268 | Fowler, Leonard | | Gas Operator | Dec 1998 |
| 269 | Fox Drilling Co | | Oil & Gas Operator | Oct 2015 |
| 270 | Fox Oil And Gas Inc | Houston, TX 77002 | Gas Operator | Dec 2002 |
| 271 | Francis Well Service, Inc. | Sandyville, WV 25275 | Oil & Gas Operator | Dec 2021 |
| 272 | Frazier Oil & Gas LLC | Elizabeth, WV 26143 | Oil & Gas Operator | Dec 2021 |
| 273 | Freedom Oil & Gas, Inc. | Branchland, WV 25506 | Gas Operator | Dec 2021 |
| 274 | French Creek Dev Inc | | Oil & Gas Operator | Dec 2006 |
| 275 | Freshwater, Harold | Walker, WV 26180-0000 | Oil & Gas Operator | Dec 2021 |
| 276 | G & M Contracting, Inc. | Thealka, KY 41240 | Gas Operator | Dec 2012 |
| 277 | G & S Drilling Company | | Oil & Gas Operator | Dec 2019 |
| 278 | Gainer, Phillip L | Fort Myers, FL 33908 | Oil & Gas Operator | Dec 2021 |
| 279 | Gallatin Fuels, Inc. | Uniontown, PA 15401-5513 | Oil & Gas Operator | Dec 2020 |
| 280 | Garrett, Rick J And Desari S | Glenville, WV 26351-0000 | Oil & Gas Operator | Dec 2021 |
| 281 | Gas Supply Corp | | Oil & Gas Operator | Dec 2008 |
| 282 | Gas Wells, Inc. | Shinnston, WV 26431 | Oil & Gas Operator | Dec 2021 |
| 283 | Gassearch Corporation | | Oil & Gas Operator | Dec 2008 |
| 284 | Genesis Exploration & Production Co., LLC | | Oil & Gas Operator | Dec 2019 |
| 285 | Geo Energy, LLC | Sand Fork, WV 26430 | Oil & Gas Operator | Dec 2021 |
| 286 | Geoex, Inc. | Williamson, WV 25661 | Oil & Gas Operator | Dec 2023 |
| 287 | Geomet Operating Co., Inc. | | Gas Operator | Dec 2013 |
| 288 | Gilbert Exploration Company Inc | Charleston, WV 25301 | Oil & Gas Operator | Dec 2023 |
| 289 | Gilco Gas, Inc. | | Gas Operator | Dec 2008 |
| 290 | Glen Daniels Gas Company | Charleston, WV 25300-0000 | Gas Operator | Dec 2021 |
| 291 | Glover Oilfield Service, Inc. | Olney, IL 62450 | Oil & Gas Operator | Dec 2013 |
| 292 | Glover'S Oil & Gas | Middlebourne, WV 26149 | Oil & Gas Operator | Dec 2021 |
| 293 | Goff Connector LLC | | Gas Operator | Jul 2014 |
| 294 | Goff, Delbert | | Gas Operator | Dec 2021 |
| 295 | Gold Energy Corp | Overland Park, KS 66225-6046 | Oil & Gas Operator | Dec 2021 |
| 296 | Gossett, Henry O., Jr. | Longview, TX 75606 | Oil & Gas Operator | Dec 2001 |
| 297 | Gpo Energy, LLC | Walton, WV 25286 | Oil & Gas Operator | Dec 2020 |
| 298 | Great Oak Energy, Inc. | Oakmont, PA 15139-2003 | Oil & Gas Operator | Feb 2021 |
| 299 | Great Western Onshore Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 300 | Greenville Land Development Co. | Elizabeth, WV 26143-0252 | Oil & Gas Operator | Dec 2021 |