| 8401 | Douglas W. Baker Trustee | | Oil & Gas Operator | Dec 1993 |
| 8402 | Douglas Whitney | | Oil Operator | Dec 2004 |
| 8403 | Douglas, Marvin E Dba Douglas Radiation | | Oil & Gas Operator | Dec 2023 |
| 8404 | Douglas, Norvel Trust | H SPG NTL PK, AR 71909 | Oil & Gas Operator | Aug 2013 |
| 8405 | Douglass Dietz & Daley Inc | Oklahoma City, OK 73154-0125 | Oil & Gas Operator | Aug 2023 |
| 8406 | Dove Creek Energy, Inc. | Fort Worth, TX 76121 | Oil & Gas Operator | Jul 2025 |
| 8407 | Dove Creek Resources, LLC | Arlington, TX 76012 | Oil Operator | Jul 2025 |
| 8408 | Dove Drilling, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 1997 |
| 8409 | Dove Investments LLC | Wetumka, OK 74883 | Oil Operator | Mar 2025 |
| 8410 | Dove Mineral | Abilene, TX 79601 | Oil & Gas Operator | Dec 2010 |
| 8411 | Dover Atwood Corporation | Massillon, OH 44646 | Oil & Gas Operator | Dec 2024 |
| 8412 | Dover Oil Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 1999 |
| 8413 | Dow Intrastate Gas Company | | Oil Operator | Dec 2023 |
| 8414 | Dow Mineral & Royalty Co, Inc | | Oil & Gas Operator | Jun 1994 |
| 8415 | Dowd, Gene | | Oil & Gas Operator | Dec 2013 |
| 8416 | Dowden, T. L. | Henderson, TX 75652 | Oil & Gas Operator | Jul 2025 |
| 8417 | Dowell Oil & Gas | Stephenville, TX 76401 | Oil & Gas Operator | Jul 2025 |
| 8418 | Down-Hole Pump Service Co., Inc. | Fort Worth, TX 76109 | Oil & Gas Operator | Jul 2025 |
| 8419 | Downhole Oil & Gas Tech LLC | Countyline, OK 73152-0027 | Oil Operator | Oct 2009 |
| 8420 | Downing Well Service, Inc. | Devine, TX 78016 | Oil & Gas Operator | Jul 2025 |
| 8421 | Downing-Nelson Oil Co Inc | Hays, KS 67601 | Oil & Gas Operator | Mar 2025 |
| 8422 | Downman Jones Oil Operators, Inc | Brookshire, TX 77423 | Oil & Gas Operator | Jan 2007 |
| 8423 | Doyle Dempsey | | Oil Operator | May 1997 |
| 8424 | Doyle E Baxter | Bloomfield, NM 87413 | Oil Operator | Feb 2005 |
| 8425 | Doyle Hartman | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 8426 | DP Permian Operator, LLC | Houston, TX 77024 | Oil & Gas Operator | Aug 2024 |
| 8427 | DP Well Works I, LLC | Salt Lake Cty, UT 84103 | Oil & Gas Operator | Jul 2025 |
| 8428 | DP2, LLC | Southlake, TX 76092 | Oil & Gas Operator | Jul 2025 |
| 8429 | DPMP Energy LLC | Prosper, TX 75078 | Oil & Gas Operator | Dec 2023 |
| 8430 | DR Well Operator | | Oil Operator | Jan 1990 |
| 8431 | DR. Richard C. Baker | | Oil & Gas Operator | Sep 2009 |
| 8432 | Drachen Energy Co. | San Antonio, TX 78258 | Oil Operator | Jul 2025 |
| 8433 | Drachen Oil Company | San Antonio, TX 78258 | Oil & Gas Operator | Jul 2025 |
| 8434 | Draco Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 8435 | Draco Production Company | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2012 |
| 8436 | Dragon Energy Corporation | | Oil & Gas Operator | Oct 2006 |
| 8437 | Dragon Energy LLC | Tulsa, OK 74135-7234 | Oil & Gas Operator | Feb 2015 |
| 8438 | Dragon Operating, LLC | Tulsa, OK 74137 | Oil Operator | Jul 2025 |
| 8439 | Dragoon Oil & Gas Co. | Fort Worth, TX 76147 | Oil & Gas Operator | May 2015 |
| 8440 | Drain Oil Co. | Fritch, TX 79036 | Oil & Gas Operator | Jul 2009 |
| 8441 | Drain Oil Co. LLC | Fritch, TX 79036 | Oil & Gas Operator | Jul 2025 |
| 8442 | Drake Denver | Shinglehouse, PA 16748-5517 | Oil & Gas Operator | Dec 2024 |
| 8443 | Drake Energy Corporation | | Gas Operator | Dec 2024 |
| 8444 | Drake Exploration Inc | Tulsa, OK 74105-4250 | Oil & Gas Operator | May 2025 |
| 8445 | Drake Exploration LLC | Arkansas City, KS 67005 | Oil & Gas Operator | Apr 2025 |
| 8446 | Drake Oil & Gas, LLC | Wichita Falls, TX 76308 | Oil Operator | Jul 2025 |
| 8447 | Drake Petroleum, LLC | Cypress, TX 77429 | Oil & Gas Operator | Jun 2023 |
| 8448 | Drake, Stuart | | Oil Operator | Dec 2013 |
| 8449 | Draw Oil & Gas Inc | | Oil & Gas Operator | Jun 1995 |
| 8450 | Drawings, LLC | Albuquerque, NM 87109 | Oil Operator | Jan 2025 |
| 8451 | DRD Operating Company | | Oil & Gas Operator | Feb 2014 |
| 8452 | Dreher, George R. | Midland, TX 79702 | Oil & Gas Operator | Jan 2018 |
| 8453 | Dreiling Exploration LLC | Victoria, KS 67671 | Oil Operator | Mar 2018 |
| 8454 | Dreiling Limited | | Oil Operator | Jun 1984 |
| 8455 | Dreiling Oil Inc | Hays, KS 67601 | Oil Operator | Jun 2018 |
| 8456 | Dreiling Resourc | | Oil Operator | Oct 1996 |
| 8457 | Dreiling Resources Inc. | Victoria, KS 67671 | Oil Operator | Sep 1997 |
| 8458 | Drennan Oil L.L.C. | Ballinger, TX 76821 | Oil & Gas Operator | Jul 2025 |
| 8459 | Drennan, D. E. | Graham, TX 76450 | Oil & Gas Operator | Dec 2011 |
| 8460 | Dresser Industrial Park, Inc. | North Tonawanda, NY 14120 | Gas Operator | Dec 2024 |
| 8461 | Drew Cornell, Inc. | | Oil & Gas Operator | Jun 1992 |
| 8462 | Drew Cornell, Inc.-Agent | | Oil & Gas Operator | Sep 1990 |
| 8463 | Drew Cornell,Inc.-C.H.Lawrence | | Oil & Gas Operator | Sep 1990 |
| 8464 | Drew Cornell,Inc.-R Waterbury | | Oil Operator | Jun 1999 |
| 8465 | Dreyer Oil | | Oil Operator | Dec 2019 |
| 8466 | Dreyer Oil - Lel | | Oil Operator | Nov 1993 |
| 8467 | Dreyfus, Louis Natural Gas Corp | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2001 |
| 8468 | DRG Energy Inc | Norman, OK 73026-3171 | Oil & Gas Operator | Apr 2025 |
| 8469 | DRH Properties LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 8470 | Dri Operating Company | West Chester, PA 19382-0000 | Gas Operator | Dec 2008 |
| 8471 | Driftwood Energy Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Dec 2022 |
| 8472 | Driftwood Oil Co. | Russell, KS 67665 | Oil Operator | Jan 1988 |
| 8473 | Driftwood Oil, LLC | Jal, NM 88252 | Oil & Gas Operator | May 2025 |
| 8474 | Drilex Oil & Gas | | Oil Operator | Apr 1987 |
| 8475 | Drill Partners Management, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2010 |
| 8476 | Driller'S & Prod | | Oil & Gas Operator | Oct 1994 |
| 8477 | Drillers & Producers, Inc. | Newton, KS 67114 | Oil Operator | Dec 2019 |
| 8478 | Drillers Energy Search, Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 8479 | Drillers LLC | Indiana, PA 15701 | Oil & Gas Operator | Dec 2024 |
| 8480 | Drillex Inc | Mentor, OH 44060 | Oil & Gas Operator | Dec 2003 |
| 8481 | Drillex, LLC | Draper, UT 84020 | Oil & Gas Operator | Jun 2025 |
| 8482 | Drilling & Production Co. | | Oil & Gas Operator | May 2025 |
| 8483 | Drilling Exploration & Operating Co. Inc. | | Oil & Gas Operator | Apr 2025 |
| 8484 | Drilling, Operg & Explor, Inc. | | Oil & Gas Operator | Feb 1990 |
| 8485 | Drillmar Energy, Inc. | Houston, TX 77079 | Oil & Gas Operator | Nov 2014 |
| 8486 | Drillmar Operating Company | Houston, TX 77019 | Oil & Gas Operator | Jun 2013 |
| 8487 | Drillogix Exploration LLC | Breckenridge, TX 76424 | Oil Operator | Jul 2025 |
| 8488 | Drilmor, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 1998 |
| 8489 | Driltrol | | Oil & Gas Operator | Dec 1984 |
| 8490 | Drindak* Jon | | Oil Operator | Aug 2013 |
| 8491 | Driscoll Jerry J | | Oil Operator | Apr 1994 |
| 8492 | Driscoll Lease O | | Oil Operator | Jul 1988 |
| 8493 | Driscoll Lease Operations, Inc. | Russell, KS 67665 | Oil Operator | Dec 1998 |
| 8494 | Driscoll S.W.D. Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Jul 2025 |
| 8495 | Driscoll, Jerry J Oil Investment Inc | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 8496 | Driver Energy Of Texas | Dallas, TX 75379-5951 | Oil & Gas Operator | Apr 2011 |
| 8497 | DRL Operating In | | Oil Operator | Sep 1986 |
| 8498 | Drmas, LLC | | Oil & Gas Operator | Nov 2024 |
| 8499 | Drop Tine Exploration, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Dec 2019 |
| 8500 | DRS Exploration Inc. | San Antonio, TX 78209 | Oil & Gas Operator | May 1999 |