| 8301 | Drop Tine Exploration, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Dec 2019 |
| 8302 | DRS Exploration Inc. | San Antonio, TX 78209 | Oil & Gas Operator | May 1999 |
| 8303 | Drum Energy Corp | Hobbs, NM 88241 | Oil & Gas Operator | Mar 1996 |
| 8304 | Drum Energy, L.L.C. | | Gas Operator | Dec 2016 |
| 8305 | Drum Oil & Gas, Inc. | Houston, TX 77082 | Oil & Gas Operator | Jun 2026 |
| 8306 | Drum, Delton | Liberty, TX 77575 | Oil & Gas Operator | Jul 2005 |
| 8307 | Drummond Upstream LLC | Tulsa, OK 74104 | Oil & Gas Operator | Mar 2026 |
| 8308 | Drummond, F F | | Oil Operator | Mar 2026 |
| 8309 | Drumright Well Service Inc | Oilton, OK 74052 | Oil & Gas Operator | Mar 2026 |
| 8310 | Dry Coulee Oil & Gas Company | Oilmont, MT 59466 | Oil Operator | Oct 2003 |
| 8311 | Dry Creek Disposal Company, Inc. | | Oil & Gas Operator | Nov 2021 |
| 8312 | Dry Creek Operating, LLC | Fort Worth, TX 76109 | Oil & Gas Operator | Jun 2026 |
| 8313 | Dry Fork Production Co | Wichita Falls, TX 76301 | Oil Operator | Apr 2003 |
| 8314 | Dry Fork Production Co., LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2026 |
| 8315 | Dry Hole Producing LLC | Poland, OH 44514 | Oil & Gas Operator | Dec 2025 |
| 8316 | Dry Hole Producing LP | Poland, OH 44514-3631 | Oil & Gas Operator | Dec 2019 |
| 8317 | Dryes Corner LLC | Oklahoma City, OK 73118 | Oil Operator | Mar 2026 |
| 8318 | DSB Energy, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2026 |
| 8319 | DSM Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | May 1996 |
| 8320 | DSR Oil & Gas, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Jun 2026 |
| 8321 | DSTJ Corporation | Montgomery, TX 77316 | Oil & Gas Operator | Mar 2001 |
| 8322 | DSW Production Corp. | Houston, TX 77265 | Oil & Gas Operator | Jun 2026 |
| 8323 | DSX Operating Co. | Amarillo, TX 79105 | Oil & Gas Operator | Mar 2008 |
| 8324 | Dte Gas Resources, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2007 |
| 8325 | Dte Gas Resources, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2014 |
| 8326 | Du Pont Oil Comp | | Oil Operator | May 1984 |
| 8327 | Dual Energy, Inc. | | Oil & Gas Operator | Oct 2022 |
| 8328 | Dual Operating & Production Co | Tulsa, OK 74145-7831 | Oil & Gas Operator | Apr 2020 |
| 8329 | Dual Production Partners, LLC | Nacogdoches, TX 75963 | Oil & Gas Operator | Jun 2026 |
| 8330 | Dual Quiver Oil & Gas Op, LLC | Flower Mound, TX 75027 | Oil & Gas Operator | Jun 2026 |
| 8331 | Duane Exploration Limited | Andover, KS 67002 | Oil Operator | Jul 1996 |
| 8332 | Dubach Gas Company | | Oil Operator | May 2003 |
| 8333 | Dubisz, Richard And Deborah | East Aurora, NY 14052 | Gas Operator | Dec 2024 |
| 8334 | Dublin Petroleum Corporation | Enid, OK 73702-6029 | Oil & Gas Operator | Mar 2026 |
| 8335 | Dubois, Allen | Whitewater, KS 67154 | Oil Operator | May 2000 |
| 8336 | Ducharme Oil, LLC | | Oil & Gas Operator | Jan 2025 |
| 8337 | Duck Bros Dozer & Trucking Inc | Konawa, OK 74849 | Oil & Gas Operator | Mar 2026 |
| 8338 | Duck Creek Energy Inc | Brecksville, OH 44141 | Oil & Gas Operator | Dec 2025 |
| 8339 | Duck Creek Petroleum LLC | Wooster, OH 44691 | Oil & Gas Operator | Dec 2012 |
| 8340 | Duck Oil Company LLC | Konawa, OK 74849 | Oil Operator | Apr 2026 |
| 8341 | Ducky Oil Corporation | Fort Worth, TX 76120 | Oil & Gas Operator | Jun 2026 |
| 8342 | Duco Energy LLC | Tulsa, OK 74145-4514 | Oil & Gas Operator | Mar 2015 |
| 8343 | Ducote Oil Co. | | Oil & Gas Operator | Sep 1997 |
| 8344 | Duderstadt, A. R. | Boling, TX 77420 | Oil & Gas Operator | Jun 2026 |
| 8345 | Dudley Oil Co. | Crane, TX 79731 | Oil & Gas Operator | Jan 2006 |
| 8346 | Dudrey Carl | | Oil & Gas Operator | Feb 1993 |
| 8347 | Duer Wagner & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 1998 |
| 8348 | Duerfeldt | | Oil Operator | Dec 2025 |
| 8349 | Duff Oil Co | | Oil & Gas Operator | Aug 2000 |
| 8350 | Duffer William R | Edmond, OK 73034-6761 | Oil & Gas Operator | Aug 2018 |
| 8351 | Dugan Evan | Martinsburg, OH 43037 | Oil & Gas Operator | Dec 2024 |
| 8352 | Dugan Guy E | Walhonding, OH 43843 | Oil & Gas Operator | Dec 2015 |
| 8353 | Dugan Harry Oil Co | Newark, OH 43055 | Oil & Gas Operator | Dec 1993 |
| 8354 | Dugan Oil And Gas LLC | Walhonding, OH 43843-9612 | Oil & Gas Operator | Dec 2025 |
| 8355 | Dugan Production Corp | Farmington, NM 87499 | Oil & Gas Operator | Apr 2026 |
| 8356 | Duggan Stephen F | Boston, MA 2131 | Oil & Gas Operator | Jun 2010 |
| 8357 | Dugger, Glenn | Alice, TX 78332 | Oil & Gas Operator | Nov 2013 |
| 8358 | Duhring Resource Co | Sheffield, PA 16347-2642 | Oil & Gas Operator | Dec 2012 |
| 8359 | Duink, Darryl | Hamburg, NY 14075 | Gas Operator | Dec 2024 |
| 8360 | Duke Drilling Co | Wichita, KS 67202 | Oil & Gas Operator | Feb 2006 |
| 8361 | Duke Energy Field Services Inc | | Oil Operator | Mar 2000 |
| 8362 | Duke Energy Field Services LLC | | Oil Operator | Dec 2006 |
| 8363 | Duke Gas Company LLC | | Oil & Gas Operator | Apr 2026 |
| 8364 | Duke Oil & Gas Company, LLC | Wellsville, KS 66092 | Oil Operator | Feb 2026 |
| 8365 | Duke Oil & Gas Inc | Colorado City, TX 79512 | Oil & Gas Operator | May 2003 |
| 8366 | Duke Oil LLC | Garnett, KS 66032 | Oil Operator | Feb 2026 |
| 8367 | Duke Operating Company | Graham, TX 76450 | Oil Operator | Jun 2026 |
| 8368 | Duke, M. L. | Snyder, TX 79549 | Oil & Gas Operator | Mar 2008 |
| 8369 | Duke, M.A. "Andy", Jr. | Montague, TX 76251 | Oil & Gas Operator | Jun 2023 |
| 8370 | Dukes T F | | Oil & Gas Operator | Apr 2007 |
| 8371 | Dula Production, LLC | Stockdale, TX 78160 | Oil Operator | Jun 2026 |
| 8372 | Dunamis Energy Operating LLC | | Oil & Gas Operator | Mar 2026 |
| 8373 | Dunbar & Son Oil | | Oil & Gas Operator | Oct 1988 |
| 8374 | Dunbar, Ron, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2012 |
| 8375 | Duncan Drilling Co. | Big Spring, TX 79721 | Oil & Gas Operator | Jun 2026 |
| 8376 | Duncan Energy Company | Denver, CO 80202 | Oil & Gas Operator | Mar 2008 |
| 8377 | Duncan Energy Companyuncan Energy Company | Denver, CO 80210 | Oil & Gas Operator | Jun 1995 |
| 8378 | Duncan Energy LLC | Dallas, TX 75231 | Oil & Gas Operator | Jun 2026 |
| 8379 | Duncan Jr J Walter | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2016 |
| 8380 | Duncan Land & Exploration, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 8381 | Duncan Oil & Gas Inc | Norman, OK 73072 | Oil & Gas Operator | Sep 2020 |
| 8382 | Duncan Oil Company | Holliday, TX 76366 | Oil Operator | Mar 2008 |
| 8383 | Duncan Oil Inc | Denver, CO 80210 | Oil & Gas Operator | Jun 2016 |
| 8384 | Duncan Oil Properties, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2026 |
| 8385 | Duncan Ronald R | Okemah, OK 74859-9603 | Oil & Gas Operator | Aug 2023 |
| 8386 | Duncan, Gene L Dba Duncan Oil Co | Salem, IL 62881 | Oil Operator | Dec 2018 |
| 8387 | Duncan, Raymond T | Denver, CO 80210 | Oil & Gas Operator | Feb 1996 |
| 8388 | Duncan-Taylor & Schumacher | | Oil & Gas Operator | Nov 1987 |
| 8389 | Dundee Oil & Supply Inc | Tulsa, OK 74101 | Oil & Gas Operator | Apr 2001 |
| 8390 | Dundee Petroleum, Inc. | Buffalo Gap, TX 79508 | Oil & Gas Operator | Aug 2003 |
| 8391 | Dune Oil And Gas, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Aug 2006 |
| 8392 | Dune Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Jun 2016 |
| 8393 | Dune Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 1997 |
| 8394 | Dune Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 1993 |
| 8395 | Dunham'S Oil, LLC | Eureka, KS 67045 | Oil Operator | Feb 2026 |
| 8396 | Dunhill Expl. & Prod., LLC | | Oil & Gas Operator | Nov 2004 |
| 8397 | Dunhill Resources, Inc. | | Oil & Gas Operator | Nov 2005 |
| 8398 | Dunigan Operating Company, Inc. | Austin, TX 78755 | Oil & Gas Operator | Jun 2026 |
| 8399 | Dunigan Petroleum, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 8400 | Dunkin Oil And Gas LLC | Wynewood, OK 73098-9196 | Oil Operator | Apr 2026 |