| 301 | D & K Supply Inc | East Canton, OH 44730 | Oil & Gas Operator | Dec 2002 |
| 302 | D & L Energy Inc | Canton, OH 44718 | Oil & Gas Operator | Dec 2016 |
| 303 | D & M Enterprises Inc | Lancaster, OH 43130 | Oil & Gas Operator | Dec 1991 |
| 304 | D & T Oil | Bremen, OH 43107 | Oil & Gas Operator | Dec 2011 |
| 305 | D C Oil Company, Inc. | Sundown, TX 79372 | Oil & Gas Operator | Jun 2019 |
| 306 | D-D Oil | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2018 |
| 307 | D. G. Oil Co. | Graysville, OH 45734 | Oil & Gas Operator | Jun 2019 |
| 308 | Dalton & Hanna LTD | Wooster, OH 44691 | Oil & Gas Operator | Dec 2017 |
| 309 | Danny Long & Sons Inc | Magnolia, OH 44643 | Oil & Gas Operator | Dec 2018 |
| 310 | Darl Hann Gas Company | Malta, OH 43758 | Oil & Gas Operator | Dec 2018 |
| 311 | Dart Oil & Gas Corporation | Mason, MI 48854-0177 | Oil & Gas Operator | May 2018 |
| 312 | Dart Oil & Gas Ohio LLC | Mason, MI 48854-0177 | Oil Operator | Dec 2017 |
| 313 | Dart Oil Company | Denver, CO 80237 | Oil & Gas Operator | Dec 2018 |
| 314 | Daugherty Oil Co | Glenford, OH 43739 | Oil Operator | Dec 2018 |
| 315 | David A Waldron & Assoc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2016 |
| 316 | David R Hill Inc | Byesville, OH 43723 | Oil & Gas Operator | Dec 2018 |
| 317 | Davis Bradley & Kathy | Stockport, OH 43787 | Oil Operator | Dec 2018 |
| 318 | DC Oil & Gas LLC | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2018 |
| 319 | Dci Petroleum Inc | Dorset, OH 44032 | Oil & Gas Operator | Dec 2017 |
| 320 | Decker Well Service LLC | Fleming, OH 45729 | Oil & Gas Operator | Dec 2017 |
| 321 | Decleva, Paul | Wichita Falls, TX 76302 | Oil & Gas Operator | Jun 2019 |
| 322 | Deep Resources LLC | Holmesville, OH 44633 | Oil & Gas Operator | Dec 2018 |
| 323 | Deer Creek Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 2018 |
| 324 | Deer Oil & Gas | Marietta, OH 45750 | Oil & Gas Operator | Dec 2018 |
| 325 | Delta Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2018 |
| 326 | Dennis Lloyd D | Fleming, OH 45729 | Oil & Gas Operator | Dec 2018 |
| 327 | Depuy Drilling Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 2018 |
| 328 | Derby Oil & Gas Corp | Cumberland, OH 43732 | Oil & Gas Operator | Dec 1986 |
| 329 | Derby Operating Corp | Wooster, OH 44691 | Oil & Gas Operator | Dec 2018 |
| 330 | Derrick Petroleum Inc | Bladensburg, OH 43005 | Oil & Gas Operator | Dec 2018 |
| 331 | Desco Corp | Columbus, OH 43085 | Oil & Gas Operator | Dec 1989 |
| 332 | Dever Lavon B | Cambridge, OH 43725 | Oil & Gas Operator | Dec 2012 |
| 333 | Dever Linda K | Norwalk, OH 43767 | Oil & Gas Operator | Dec 2017 |
| 334 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2019 |
| 335 | Devore Anthony D | Gambier, OH 43022 | Oil & Gas Operator | Dec 2010 |
| 336 | Diamond Oil Co | Lancaster, OH 43130 | Oil & Gas Operator | Dec 1992 |
| 337 | Diamond Shamrock Chem Co | Irving, TX 75061 | Oil & Gas Operator | Dec 1990 |
| 338 | Dietrich Foundation | Pittsburg, PA 15219 | Gas Operator | Dec 2018 |
| 339 | Dietrich Philip H | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2018 |
| 340 | Dietz Oil Field Supply | Dover, OH 44622 | Oil & Gas Operator | Dec 1997 |
| 341 | Dillon John C | Nashport, OH 43830 | Oil Operator | Dec 2018 |
| 342 | Dils Oil & Gas | Parkersburg, WV 26102 | Oil & Gas Operator | Dec 2017 |
| 343 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | Jun 2019 |
| 344 | Discovery Oil And Gas | Canonburg, PA 15317 | Oil & Gas Operator | Dec 2018 |
| 345 | Discovery Oil LTD | Los Angeles, CA 90067 | Oil & Gas Operator | Dec 1990 |
| 346 | Dix Real Estate Holdings LLC | Wooster, OH 44691 | Gas Operator | Dec 2018 |
| 347 | Dixon Exploration Inc | Toledo, OH 43606 | Oil & Gas Operator | Jun 2018 |
| 348 | DJ Oil Company, Inc | Kermit, TX 79745 | Oil & Gas Operator | Jun 2019 |
| 349 | DNL Oil Corp | New Lexington, OH 43764 | Oil & Gas Operator | Dec 2012 |
| 350 | Dome Drilling Co | Westlake, OH 44145-1964 | Oil & Gas Operator | Dec 2009 |
| 351 | Dome Producing | Cleveland, OH 44114 | Oil & Gas Operator | Dec 1988 |
| 352 | Domestic Oil & Gas Co | Bedford, OH 44146 | Oil & Gas Operator | Dec 1990 |
| 353 | Dominion East Ohio | North Canton, OH 44720 | Oil & Gas Operator | Dec 2018 |
| 354 | Dominion Exploration & Production Inc | Houston, TX 77060-2309 | Oil & Gas Operator | Sep 2015 |
| 355 | Dominion Field Services Inc | Richmond, VA 23219 | Oil & Gas Operator | Dec 2013 |
| 356 | Don Yohe Enterprises Inc. | Armada, MI 48005 | Oil & Gas Operator | Jun 2015 |
| 357 | Donadee Resources LLC | Canfield, OH 44406 | Oil & Gas Operator | Dec 2018 |
| 358 | Donaker Alan M | Warsaw, OH 43844 | Oil & Gas Operator | Dec 1994 |
| 359 | Donald Byers Oil & Gas LLC | Heath, OH 43056 | Oil & Gas Operator | Dec 2018 |
| 360 | Doran & Associates | Pittsburgh, PA 15220 | Oil & Gas Operator | Dec 1988 |
| 361 | Dorfman Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2019 |
| 362 | Dorsey Oil & Gas LLC | Nashport, OH 43830 | Oil & Gas Operator | Dec 2018 |
| 363 | Dover Atwood Corp. | Massillon, OH 44646 | Oil & Gas Operator | Feb 2019 |
| 364 | Dover Oil Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 1999 |
| 365 | Dreve Wendel Edward | Adamsville, OH 43802 | Gas Operator | Dec 2018 |
| 366 | Drillex Inc | Mentor, OH 44060 | Oil & Gas Operator | Dec 2003 |
| 367 | Drummond David & Rex | Conneaut, OH 44030 | Oil & Gas Operator | Dec 2018 |
| 368 | Dry Hole Producing LP | Poland, OH 44514-3631 | Oil & Gas Operator | Dec 2018 |
| 369 | Duck Creek Energy Inc | Brecksville, OH 44141 | Oil & Gas Operator | Dec 2018 |
| 370 | Duck Creek Petroleum LLC | Wooster, OH 44691 | Oil & Gas Operator | Dec 2012 |
| 371 | Dugan Guy E | Walhonding, OH 43843 | Oil & Gas Operator | Dec 2015 |
| 372 | Dugan Harry Oil Co | Newark, OH 43055 | Oil & Gas Operator | Dec 1993 |
| 373 | Dugan Oil And Gas LLC | Walhonding, OH 43843-9612 | Oil & Gas Operator | Dec 2018 |
| 374 | Dupke Roger Oil Co Inc | Reno, OH 45773 | Oil & Gas Operator | Dec 2004 |
| 375 | Dupler Carl T | Somerset, OH 43783 | Oil Operator | Dec 2018 |
| 376 | Durst Oil & Gas, Inc. | Point Pleasant, WV 25550 | Oil & Gas Operator | Dec 2017 |
| 377 | Dustin Energy Inc | Warren, OH 44481 | Oil & Gas Operator | Dec 2018 |
| 378 | Dusty Drilling & Production Co | New Lexington, OH 43764-1552 | Oil & Gas Operator | Dec 2005 |
| 379 | Duty Oil & Gas Prod Co | Akron, OH 44306 | Oil & Gas Operator | Dec 1997 |
| 380 | Dye Walter M | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2016 |
| 381 | E & C Miller Production LTD | Utica, OH 43080 | Gas Operator | Dec 2018 |
| 382 | E I C Inc | Coshocton, OH 43812 | Oil & Gas Operator | Dec 1984 |
| 383 | Eagle Drilling | Lowell, OH 45744 | Oil & Gas Operator | Dec 2018 |
| 384 | Eagle Expl Co/Johnson J | Bolivar, OH 44612 | Oil & Gas Operator | Dec 1989 |
| 385 | Eagle Mountain Energy | Columbus, OH 43214-981 | Oil & Gas Operator | Dec 2002 |
| 386 | Eap Ohio LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2019 |
| 387 | Earley Donald E | Utica, OH 43080-0386 | Oil Operator | Dec 2018 |
| 388 | Earley Ronnie & Floyd E Jr | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2018 |
| 389 | Eastern Amer Energy Corp | Charleston, WV 25304 | Oil & Gas Operator | Dec 2006 |
| 390 | Eastern Mountain Fuel Inc | Marietta, OH 45750-1240 | Oil & Gas Operator | Dec 2002 |
| 391 | Eastern Petroleum Company | Hartville, OH 44632 | Oil & Gas Operator | Sep 1995 |
| 392 | Eastern States Oil & Gas, Inc. | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2017 |
| 393 | Eastland Energy Group Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 2018 |
| 394 | Echo Drilling Inc | Newcomerstown, OH 43832 | Oil & Gas Operator | Dec 2018 |
| 395 | Eclipse Resources I LP | State College, PA 16803 | Oil & Gas Operator | Mar 2019 |
| 396 | Eclipse Resources-Ohio LLC | State College, PA 16803 | Oil & Gas Operator | Dec 2018 |
| 397 | Eco Production LLC | Wooster, OH 44691-4683 | Oil & Gas Operator | Dec 2018 |
| 398 | Edco Drilling & Producing | MT Gilead, OH 43338 | Oil & Gas Operator | Dec 2006 |
| 399 | Eei Inc | MT Pleasant, MI 48858 | Oil & Gas Operator | Dec 1990 |
| 400 | Elan Energy Inc | Toledo, OH 43604-1207 | Oil & Gas Operator | Dec 1990 |