| 1501 | D & T Swabbing & Well Serv Inc | Hennessey, OK 73742-0124 | Oil & Gas Operator | Dec 2025 |
| 1502 | D B D Oil & Gas Company | Houston, TX 77001 | Oil & Gas Operator | Mar 2015 |
| 1503 | D B Operating Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2000 |
| 1504 | D C Energy | Tulsa, OK 74137 | Oil Operator | Jun 2009 |
| 1505 | D C Energy, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2020 |
| 1506 | D C Oil Company, Inc. | Sundown, TX 79372 | Oil & Gas Operator | Mar 2026 |
| 1507 | D O Walker Inc | Stratford, OK 74872 | Oil Operator | Sep 2025 |
| 1508 | D-B-K Operating Company | | Oil Operator | Jan 2006 |
| 1509 | D-Mil Production Inc | Argyle, TX 76226 | Oil & Gas Operator | Mar 2026 |
| 1510 | D-Pex Operating Company | | Oil & Gas Operator | Sep 2004 |
| 1511 | D.J.F. Services, Inc. | Holdenville, OK 74848 | Oil & Gas Operator | Mar 2026 |
| 1512 | Dab And Associates Inc | Crescent, OK 73028-0580 | Oil & Gas Operator | Nov 2014 |
| 1513 | Dab Limited | Oklahoma City, OK 73116-9082 | Oil & Gas Operator | Aug 2013 |
| 1514 | Dabb Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Aug 2020 |
| 1515 | Dahl & Smith Oil Co | Barnsdall, OK 74002 | Oil & Gas Operator | Aug 1999 |
| 1516 | Dahl Randall Lee | Barnsdall, OK 74002 | Oil Operator | Dec 2025 |
| 1517 | Dahl SWD Facility #1 LLC | Oklahoma City, OK 73118 | Gas Operator | Dec 2017 |
| 1518 | Daisy Pointer | | Oil Operator | Jul 1999 |
| 1519 | Dakota Exploration LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 1520 | Dakota Oil Company | Hebbronville, TX 78361 | Oil & Gas Operator | Mar 2026 |
| 1521 | Dalco Petroleum Inc | | Oil & Gas Operator | Jan 2006 |
| 1522 | Dalcor Energy LLC | Duncan, OK 73534 | Oil & Gas Operator | Nov 2025 |
| 1523 | Dale George | Elmore City, OK 73433 | Oil & Gas Operator | Aug 2022 |
| 1524 | Dale Jimmy | Davis, OK 73030 | Oil & Gas Operator | Mar 2015 |
| 1525 | Dalen Resources Oil & Gas Co | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 1526 | Dales Tank Truck Service Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Dec 2025 |
| 1527 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 1528 | Damson Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Mar 2005 |
| 1529 | Dana Petroleum Inc | Salt Lake City, UT 84047 | Oil & Gas Operator | Nov 1998 |
| 1530 | Dance Oil Co | Denver, CO 80202 | Oil & Gas Operator | May 1993 |
| 1531 | Danco Enterprises Inc | Ada, OK 74820 | Oil Operator | Apr 2008 |
| 1532 | Danick Operating USA Inc | McKinney, TX 75072-9071 | Oil & Gas Operator | Oct 2022 |
| 1533 | Daniel Resource Dev Inc | Tomball, TX 77375-8919 | Oil & Gas Operator | Oct 2009 |
| 1534 | Daniel-Price Exploration Co | Tulsa, OK 74119 | Gas Operator | Apr 2011 |
| 1535 | Daniels Corporation, The | Seabrook, TX 77586 | Oil & Gas Operator | Mar 2026 |
| 1536 | Daniels Danny | Tishomingo, OK 73460-0853 | Oil Operator | Apr 2015 |
| 1537 | Daniels Earlene Inc | Follett, TX 79034-9736 | Oil & Gas Operator | Mar 2015 |
| 1538 | Daniels Energy | Pampa, TX 79066 | Oil & Gas Operator | Mar 2026 |
| 1539 | Danny Engel Operating LLC | Ada, OK 74820-1388 | Oil Operator | Nov 2025 |
| 1540 | Dar-Lon Operating Company | Lamont, OK 74643 | Oil & Gas Operator | Oct 2000 |
| 1541 | Darco Petroleum Inc | Bartlesville, OK 74005 | Oil & Gas Operator | Dec 2020 |
| 1542 | Darden Energy Corp | Hennessey, OK 73742 | Oil & Gas Operator | Jul 1999 |
| 1543 | Darling Dan Oil | | Oil & Gas Operator | Sep 2018 |
| 1544 | Darling Oil Corporation | Lamont, OK 74643 | Oil & Gas Operator | Dec 2025 |
| 1545 | Darnell Alma | Bristow, OK 74010 | Oil & Gas Operator | Jun 2000 |
| 1546 | Darnell Bobby J | Oklahoma City, OK 73112-8884 | Oil & Gas Operator | Jan 2026 |
| 1547 | Darrah Oil Company, LLC | Wichita, KS 67201 | Oil & Gas Operator | Mar 2026 |
| 1548 | Darrell'S Drilling Inc | Konawa, OK 74849 | Oil Operator | Dec 2025 |
| 1549 | Darriel C Ray | | Oil Operator | Jun 2020 |
| 1550 | Dart Oil Properties | Enid, OK 73703 | Oil & Gas Operator | Oct 1992 |
| 1551 | Darwin Allen Dba Wil-Mar Operations | Duncan, OK 73534-1566 | Oil & Gas Operator | Oct 2016 |
| 1552 | Dash Operating LLC | Oklahoma City, OK 73118-5031 | Oil & Gas Operator | Dec 2025 |
| 1553 | Data Energy Inc | Evergreen, CO 80439 | Oil & Gas Operator | Jul 2018 |
| 1554 | Daube Company The | Ardmore, OK 73401 | Oil & Gas Operator | Jan 2026 |
| 1555 | Daube Exploration Company | Ardmore, OK 73402 | Oil & Gas Operator | Nov 2020 |
| 1556 | Dauco Petroleum Corporation | Rowlett, TX 75089-3066 | Oil & Gas Operator | Jan 2021 |
| 1557 | Davco Productions Inc | Springer, OK 73458-8191 | Oil & Gas Operator | Jun 2021 |
| 1558 | David E Morgan Inc | Danville, CA 94506-2035 | Oil & Gas Operator | Dec 2025 |
| 1559 | David L Greene II LLC | | Oil Operator | Dec 2025 |
| 1560 | David Ridley Oil LLC | Tecumseh, OK 74873 | Oil Operator | Dec 2025 |
| 1561 | Davidson Energy Inc | Perry, OK 73077 | Oil & Gas Operator | Dec 2025 |
| 1562 | Davidson Gene | Perry, OK 73077-0144 | Oil & Gas Operator | Aug 2014 |
| 1563 | Davies & Company Inc | Tulsa, OK 74114 | Oil & Gas Operator | Nov 2000 |
| 1564 | Davis & Davis | | Oil & Gas Operator | Dec 2021 |
| 1565 | Davis & Davis Oil Properties Inc | Morris, OK 74445 | Oil Operator | Dec 2025 |
| 1566 | Davis & Hamilton Oil Company | Edmond, OK 73083-3670 | Oil Operator | Aug 2022 |
| 1567 | Davis Bros. Oil Producers, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2020 |
| 1568 | Davis Charles K | Morris, OK 74445-2201 | Oil & Gas Operator | Apr 2015 |
| 1569 | Davis Consulting LLC | Tulsa, OK 74104 | Oil Operator | Apr 2024 |
| 1570 | Davis Henry | Tulsa, OK 74135-3567 | Oil & Gas Operator | Dec 1994 |
| 1571 | Davis Jared | Wann, OK 74083-9610 | Oil & Gas Operator | Jan 2026 |
| 1572 | Davis Jim L | Morris, OK 74445 | Oil & Gas Operator | Dec 2021 |
| 1573 | Davis Kendall | Bethany, OK 73008-4714 | Oil Operator | Aug 2016 |
| 1574 | Davis Operating Company | Elysian Field, TX 75642 | Oil & Gas Operator | Mar 2026 |
| 1575 | Davis William H | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2014 |
| 1576 | Davis William W | | Oil Operator | Jun 2024 |
| 1577 | Davis, Joe D. | Fort Smith, AR 72903 | Gas Operator | Mar 2015 |
| 1578 | Davis/Osage Corp | Tulsa, OK 74103 | Oil Operator | Jan 2001 |
| 1579 | Davon Drilling Company | Oklahoma City, OK 73113-0665 | Oil & Gas Operator | Mar 2015 |
| 1580 | Dawes, Tom E | | Oil Operator | Oct 2000 |
| 1581 | Dawson Geophysical Company | Midland, TX 79701 | Oil Operator | Aug 2024 |
| 1582 | Dawson Resources Inc | Franktown, CO 80116 | Oil & Gas Operator | Mar 2015 |
| 1583 | Dawson, Levi S | | Oil & Gas Operator | Mar 2015 |
| 1584 | Dawson-Markwell Exploration Co. | Oklahoma City, OK 73101 | Oil & Gas Operator | Dec 2025 |
| 1585 | Daxin Energy Corporation | Seminole, OK 74868-2208 | Oil Operator | Jan 2013 |
| 1586 | Day Richard H | Wann, OK 74083-9608 | Oil Operator | Mar 2015 |
| 1587 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Mar 2026 |
| 1588 | DBS Oil Co /Osage Only | | Oil Operator | Nov 2025 |
| 1589 | Dby Investments LLC | Lago VIsta, TX 78645-8011 | Oil & Gas Operator | Nov 2016 |
| 1590 | DC Operating LLC | Yale, OK 74085-6662 | Oil & Gas Operator | Mar 2020 |
| 1591 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Nov 2025 |
| 1592 | DCP Production Company LLC | Dill City, OK 73641 | Oil & Gas Operator | Dec 2025 |
| 1593 | DDC Oil LLC | Rockwall, TX 75087-5383 | Oil Operator | Mar 2020 |
| 1594 | DDD Exploration, Inc. | Amarillo, TX 79109 | Oil & Gas Operator | Mar 2026 |
| 1595 | Dead Fern Resources Inc | Sperry, OK 74073 | Oil & Gas Operator | Jan 2026 |
| 1596 | Dead Horse Oil & Gas LLC | Skiatook, OK 74070-9343 | Oil & Gas Operator | Jun 2015 |
| 1597 | Dean'S Well Servicing Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Dec 2025 |
| 1598 | Dearing, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2021 |
| 1599 | Deb Oil & Gas Inc | Tulsa, OK 74136 | Oil & Gas Operator | May 2013 |
| 1600 | Decalta International Corp | Denver, CO 80202 | Oil & Gas Operator | Mar 2015 |