| 8401 | Donald J. Zadeck | | Oil & Gas Operator | Feb 1998 |
| 8402 | Donald Len Barreth | | Oil & Gas Operator | Dec 1991 |
| 8403 | Donald Owens | | Oil & Gas Operator | Dec 2024 |
| 8404 | Donaldson Richard E | Bartlesville, OK 74005-0032 | Oil & Gas Operator | Nov 2005 |
| 8405 | Donalu Oil | Pampa, TX 79066 | Oil & Gas Operator | Feb 2026 |
| 8406 | Doneghy James | Wellington, TX 79095 | Oil & Gas Operator | May 2013 |
| 8407 | Donke Oil & Gas, LLC | Tulsa, OK 74137 | Oil & Gas Operator | Mar 2018 |
| 8408 | Donn G. Thompson, Et Al | | Oil Operator | Apr 1987 |
| 8409 | Donna Lee Oil Co | Independence, KS 67301 | Oil & Gas Operator | Apr 2014 |
| 8410 | Donna-Lynne Oil Co. | George West, TX 78022 | Oil & Gas Operator | Jun 2018 |
| 8411 | Donnell Pipe & Supply Co/TX Corp | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2008 |
| 8412 | Donnell, Bill | Graham, TX 76450 | Oil & Gas Operator | May 1995 |
| 8413 | Donnell, Louis, Jr. | South Bend, TX 76481 | Oil & Gas Operator | Mar 2008 |
| 8414 | Donnelly Casing Pulling Co | | Oil Operator | Aug 2020 |
| 8415 | Donnie R. Morrow | | Oil Operator | Dec 2024 |
| 8416 | Donny Joe Barnhill | | Gas Operator | Dec 2024 |
| 8417 | Donoco Oil Company | La Vernia, TX 78121 | Oil & Gas Operator | Feb 2026 |
| 8418 | Donovan Joe D Or L P McElwaine | Tulsa, OK 74119 | Gas Operator | Jan 2014 |
| 8419 | Donray Petroleum LLC | Choctaw, OK 73020 | Oil & Gas Operator | Oct 2025 |
| 8420 | Donson Corporation | Edmond, OK 73083-0341 | Oil & Gas Operator | Jul 1997 |
| 8421 | Doodle-Bug, Incorporated | Paducah, TX 79248 | Oil & Gas Operator | Jan 1996 |
| 8422 | Doodlebug Oil Co | | Oil Operator | Jun 2006 |
| 8423 | Doolaree Corporation | Sherman, TX 75091 | Oil & Gas Operator | Feb 2026 |
| 8424 | Dooley, Jeff | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2012 |
| 8425 | Doonan & Sons In | | Oil Operator | Apr 1995 |
| 8426 | Doonan And Sons, Inc. | Great Bend, KS 67530 | Oil Operator | Apr 2021 |
| 8427 | Dora Inc | Levelland, TX 79336 | Oil & Gas Operator | Jul 2019 |
| 8428 | Dorado Drilling, Inc. | Gulfport, MS 39501 | Oil & Gas Operator | Feb 2026 |
| 8429 | Dorado E & P Partners LLC | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2025 |
| 8430 | Dorado Energy LLC | Edmond, OK 73012 | Oil & Gas Operator | Jan 2021 |
| 8431 | Dorado Gas Resources LLC | Centennial, CO 80112 | Oil & Gas Operator | Jul 2009 |
| 8432 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Oct 2013 |
| 8433 | Dorado Operating Inc. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2011 |
| 8434 | Doral Energy Corp. | Midland, TX 79708 | Oil & Gas Operator | Jun 2012 |
| 8435 | Doralex Energy I | | Oil & Gas Operator | Feb 1995 |
| 8436 | Doralex Energy, Inc. | San Angelo, TX 76904 | Oil Operator | Feb 2000 |
| 8437 | Doran & Associates | Pittsburgh, PA 15220 | Oil & Gas Operator | Dec 1988 |
| 8438 | Doran & Braddock & Nelson Petr | | Oil Operator | Feb 1982 |
| 8439 | Doran And Braddock | | Oil & Gas Operator | Nov 1984 |
| 8440 | Dorbert Oil & Gas, Inc. | | Gas Operator | Aug 1988 |
| 8441 | Dorcheat Oil & Gas, LLC | | Oil & Gas Operator | Dec 2024 |
| 8442 | Dorchester Explo | | Oil & Gas Operator | Dec 1984 |
| 8443 | Dorchester Exploration, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 2001 |
| 8444 | Dorchester Hugot | | Gas Operator | Sep 1993 |
| 8445 | Dorchester Hugoton LTD | Garland, TX 75042-8212 | Oil & Gas Operator | Mar 2004 |
| 8446 | Dorchester Minerals Operating LP | Dallas, TX 75219 | Oil & Gas Operator | Jun 2022 |
| 8447 | Dorchester Operating Company LLC | Refugio, TX 78377 | Oil & Gas Operator | Feb 2026 |
| 8448 | Dorchester Resources LP | Oklahoma City, OK 73154-8879 | Oil & Gas Operator | Aug 2021 |
| 8449 | Dore Corporation | Amarillo, TX 79119 | Gas Operator | Jun 2010 |
| 8450 | Dore Energy Co., LTD. | Amarillo, TX 79101 | Gas Operator | Feb 2026 |
| 8451 | Dore-Dyn Production Co., Inc. | | Oil & Gas Operator | Jul 1993 |
| 8452 | Dorey Oil Corporation | Healdton, OK 73438-0856 | Oil Operator | Apr 2014 |
| 8453 | Dorfman Production Company | Beloit, OH 44609 | Oil & Gas Operator | Feb 2026 |
| 8454 | Dorfs Drilling Company | Waurika, OK 73573 | Oil & Gas Operator | Nov 2024 |
| 8455 | Dorland, D. L. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 8456 | Dorland, D. L. Estate Of | Midland, TX 79702 | Oil & Gas Operator | Nov 1994 |
| 8457 | Dorland, D. L. Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 1994 |
| 8458 | Dorondoco Operating Co., Inc. | Brownwood, TX 76801 | Oil & Gas Operator | May 1994 |
| 8459 | Dorothy Boyce | Artesia, NM 88210 | Oil & Gas Operator | Sep 2000 |
| 8460 | Dorothy F. Hamlin | | Oil Operator | Dec 1985 |
| 8461 | Dorothy Oil Company | | Oil & Gas Operator | Oct 1994 |
| 8462 | Dorough, Lee Operations | Orlando, FL 32801 | Oil & Gas Operator | Feb 2026 |
| 8463 | Dorr, John R. | Pecos, TX 79772 | Oil & Gas Operator | Feb 2026 |
| 8464 | Dorsey Oil & Gas LLC | Nashport, OH 43830 | Oil & Gas Operator | Dec 2024 |
| 8465 | Dorso Energy | Wexford, PA 15090 | Oil & Gas Operator | Dec 2004 |
| 8466 | Dorso LLC | Wexford, PA 15090-8758 | Oil & Gas Operator | Dec 2005 |
| 8467 | Dorso LP | Wexford, PA 15090-8314 | Oil & Gas Operator | Dec 2024 |
| 8468 | Dorward Energy Corporation | Saint Petersburg, FL 33701-3255 | Oil & Gas Operator | Dec 2024 |
| 8469 | Dos Cicadas | Miles, TX 76861 | Oil & Gas Operator | Feb 2026 |
| 8470 | Dos Lobos Oil Co. | | Oil Operator | Dec 1999 |
| 8471 | Dos Rios Inc. | | Gas Operator | Dec 2025 |
| 8472 | Dossie Dews | | Oil & Gas Operator | Dec 2024 |
| 8473 | Dotson Jack M Operating Co | Norman, OK 73072-6649 | Oil Operator | Oct 1993 |
| 8474 | Dotson, Floyd | | Oil Operator | Dec 1980 |
| 8475 | Dotson, Robert M | | Oil Operator | Dec 2020 |
| 8476 | Doty, Tim | Sedan, KS 67361 | Oil Operator | Dec 2009 |
| 8477 | Double "C" Energy | Coweta, OK 74429 | Oil & Gas Operator | Mar 2015 |
| 8478 | Double "K" Oil, Inc. | Ellis, KS 67637 | Oil Operator | Dec 2019 |
| 8479 | Double 'B' Oil Co | | Oil Operator | Nov 2009 |
| 8480 | Double 'B' Oil I | | Oil Operator | Feb 1992 |
| 8481 | Double 'E' Oil-B | | Oil Operator | Mar 1989 |
| 8482 | Double 7 Oil And Gas LLC | Parsons, KS 67357 | Oil & Gas Operator | Sep 2009 |
| 8483 | Double Aa Oil, L.L.C. | | Oil Operator | Aug 2023 |
| 8484 | Double Aa S LLC | Mayport, PA 16240-5638 | Oil & Gas Operator | Dec 2019 |
| 8485 | Double Barrel Oil Co. | | Oil Operator | Dec 1978 |
| 8486 | Double Barrel Oil LLC | Brenham, TX 77834 | Oil & Gas Operator | Feb 2026 |
| 8487 | Double Barrel Operating Limited Liability Company | Wichita Falls, TX 76308 | Oil Operator | Feb 2026 |
| 8488 | Double C Oil & Gas LLC | Jenks, OK 74037-6946 | Oil Operator | Oct 2025 |
| 8489 | Double C Operating LLC | Abilene, TX 79602 | Oil Operator | Feb 2026 |
| 8490 | Double D Oil Co | Winfield, KS 67156 | Oil Operator | Sep 2025 |
| 8491 | Double D Producers, Inc | Edmonton, KY 42129 | Oil Operator | Dec 2023 |
| 8492 | Double D'S LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 8493 | Double Diamond Energy Corp. | Granbury, TX 76048 | Gas Operator | Apr 2013 |
| 8494 | Double Diamond Petroleum, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 8495 | Double E Oil & Gas, L. P. | Electra, TX 76360 | Oil & Gas Operator | Feb 2026 |
| 8496 | Double Eagle Exp | | Oil Operator | Jul 1992 |
| 8497 | Double Eagle Exploration Inc | Windthorst, TX 76389 | Oil Operator | Sep 2025 |
| 8498 | Double Eagle Oil & Gas Inc | Enid, OK 73702 | Oil & Gas Operator | Jan 2000 |
| 8499 | Double Eagle Oil Co. | Marshall, TX 75670 | Oil & Gas Operator | Jan 2002 |
| 8500 | Double Eagle Operating, LLC | Fort Worth, TX 76113 | Oil & Gas Operator | Feb 2026 |