| 1501 | Dunne Investments Operating, Inc. | Wichita, KS 67226 | Oil Operator | Mar 2002 |
| 1502 | Dunne Oil Co. | Wichita, KS 67202 | Oil Operator | Apr 1999 |
| 1503 | Dunne-Gardner Pe | | Oil & Gas Operator | Nov 1992 |
| 1504 | Dunne-Gardner Petroleum, Inc. | Wichita, KS 67202 | Gas Operator | Jun 2022 |
| 1505 | Dunnewold Farms LLC | Clymer, NY 14724 | Gas Operator | Dec 2024 |
| 1506 | Dunsmoor, David E. | Grand Junction, CO 81504 | Oil Operator | Jul 1998 |
| 1507 | Dupke Roger Oil Co Inc | Reno, OH 45773 | Oil & Gas Operator | Dec 2004 |
| 1508 | Duplantis Energy, LLC | Pleasanton, TX 78064 | Oil Operator | Dec 2025 |
| 1509 | Dupont Oil Company | | Oil Operator | Feb 1998 |
| 1510 | Dupree And Dupree | | Oil Operator | Dec 1998 |
| 1511 | Durango Energy Inc | Chickasha, OK 73023 | Oil Operator | Dec 1999 |
| 1512 | Durango Exploration LLC | Oklahoma City, OK 73120-5309 | Oil & Gas Operator | Oct 2025 |
| 1513 | Durango Operating Co., Inc. | Abilene, TX 79604 | Oil & Gas Operator | Feb 2002 |
| 1514 | Durango Operating LLC | Madison, MS 39110 | Oil & Gas Operator | Oct 2025 |
| 1515 | Durango Resources Corp. | Houston, TX 77043 | Oil & Gas Operator | Dec 2025 |
| 1516 | Durbin, Ronald R. | Moline, KS 67353 | Oil Operator | Dec 1988 |
| 1517 | Durham, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2016 |
| 1518 | Duroc Exploration LLC | Bixby, OK 74008 | Oil & Gas Operator | Sep 2025 |
| 1519 | Durossette Bill D | Haskell, OK 74436-1350 | Oil & Gas Operator | Jul 2004 |
| 1520 | Durossette Floyd R | Warner, OK 74469-0548 | Oil & Gas Operator | Apr 2011 |
| 1521 | Durossette Jr Jess | Haskell, OK 74436 | Oil Operator | Mar 2007 |
| 1522 | Durst Oil & Gas, Inc. | Point Pleasant, WV 25550 | Oil & Gas Operator | Dec 2021 |
| 1523 | Durst Oil Company | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Sep 2000 |
| 1524 | Dust Bowl Oil Company, Inc. | Spencerport, NY 14559 | Oil Operator | Dec 2024 |
| 1525 | Duster Production, Inc. | Refugio, TX 78377 | Oil & Gas Operator | Oct 2011 |
| 1526 | Dustin Energy Inc | Warren, OH 44481 | Oil & Gas Operator | Dec 2024 |
| 1527 | Dustin Enterprise | Olathe, KS 66062 | Oil Operator | Feb 1998 |
| 1528 | Dusty Drilling & Producing Corp | New Lexington, OH 43764-1552 | Oil & Gas Operator | Dec 2005 |
| 1529 | Dutch Ridge Gas Ventures, LLC | Charleston, WV 25339 | Oil & Gas Operator | Dec 2021 |
| 1530 | Dutton Bill J Oi | | Oil & Gas Operator | Oct 1992 |
| 1531 | Duty Oil & Gas Prod Co | Akron, OH 44306 | Oil & Gas Operator | Dec 1997 |
| 1532 | Duval Gas Gathering Corporation | Austin, TX 78711 | Oil & Gas Operator | Dec 2025 |
| 1533 | Dvi | | Oil Operator | Dec 2008 |
| 1534 | Dvy Energy LLC | Hadley, PA 16130-2320 | Gas Operator | Dec 2024 |
| 1535 | Dwarf Oil Company | | Oil & Gas Operator | Mar 2025 |
| 1536 | Dwayne'S Engineering | | Oil Operator | Oct 2025 |
| 1537 | Dwight A Tipton | Lovington, NM 88260 | Oil & Gas Operator | Apr 2025 |
| 1538 | Dwight Tipton Et Al | Hobbs, NM 88240 | Oil & Gas Operator | Nov 2002 |
| 1539 | DWJS Inc | Oklahoma City, OK 73159 | Oil & Gas Operator | Sep 2024 |
| 1540 | DWP Oil & Gas | Wichita Falls, TX 76309 | Oil & Gas Operator | Dec 2025 |
| 1541 | DWR Oil Company | Merkel, TX 79536 | Oil & Gas Operator | Aug 2025 |
| 1542 | Dyad Petroleum Company | Midland, TX 79710 | Oil & Gas Operator | Sep 2021 |
| 1543 | Dyco Petroleum Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 1544 | Dye Walter M | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2022 |
| 1545 | Dye, Jennifer J. | South Dayton, NY 14138 | Gas Operator | Dec 2024 |
| 1546 | Dyer Dale E Dba The Loving Company | Tulsa, OK 74107 | Oil & Gas Operator | Oct 2025 |
| 1547 | Dyer J G | | Oil & Gas Operator | May 1985 |
| 1548 | Dyer, Charles Wilbur | Longton, KS 67352 | Oil Operator | Nov 2024 |
| 1549 | Dyersdale Energy, L.P. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 1550 | Dyersdale Production Co, Inc. | Houston, TX 77019 | Oil & Gas Operator | Dec 2025 |
| 1551 | Dykes Oil Co. | | Oil Operator | Dec 2001 |
| 1552 | Dym Energy, Inc. | Celina, TX 75009 | Oil & Gas Operator | Apr 2018 |
| 1553 | Dynaco, Incorporated | | Oil & Gas Operator | Dec 1980 |
| 1554 | Dynamic Development Inc | | Oil & Gas Operator | Nov 2025 |
| 1555 | Dynamic Exploration PTRS, LLC | | Oil & Gas Operator | Nov 2024 |
| 1556 | Dynamic Exploration, Inc. | | Oil & Gas Operator | Oct 2003 |
| 1557 | Dynamic Of Texas, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Aug 2003 |
| 1558 | Dynamic Offshore Res. NS, LLC | Houston, TX 77010 | Oil & Gas Operator | May 2010 |
| 1559 | Dynamic Offshore Resources, LLC | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 1560 | Dynamic Petroleum Res., Inc. | Houston, TX 77068 | Oil & Gas Operator | Jul 1994 |
| 1561 | Dynamic Production, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 1562 | Dyne Exploration Company | Plano, TX 75093-6512 | Oil & Gas Operator | Apr 2020 |
| 1563 | Dyne Oil & Gas,Inc. | Borger, TX 79008 | Oil & Gas Operator | Dec 2017 |
| 1564 | Dyno Energy LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Oct 2025 |
| 1565 | Dyson Energy Operating, LLC | Bryan, TX 77802 | Oil & Gas Operator | Jun 2018 |
| 1566 | Dzurik Interests, Inc. | | Oil & Gas Operator | Dec 2024 |