| 1501 | Dakota Oil Company | Hebbronville, TX 78361 | Oil & Gas Operator | Jul 2025 |
| 1502 | Dalco Petroleum, Inc | | Oil & Gas Operator | Jan 2006 |
| 1503 | Dalcor Energy LLC | Duncan, OK 73534 | Oil & Gas Operator | Apr 2025 |
| 1504 | Dale George | Elmore City, OK 73433 | Oil & Gas Operator | Aug 2022 |
| 1505 | Dale Jimmy | Davis, OK 73030 | Oil & Gas Operator | Mar 2015 |
| 1506 | Dalen Resources Oil & Gas Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 1507 | Dales Tank Truck Service Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Apr 2025 |
| 1508 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 1509 | Damson Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Mar 2005 |
| 1510 | Dana Petroleum Inc | Salt Lake City, UT 84047 | Oil & Gas Operator | Nov 1998 |
| 1511 | Dance Oil Company | Denver, CO 80202 | Oil & Gas Operator | May 1993 |
| 1512 | Danco Enterprises Inc | Ada, OK 74820 | Oil Operator | Apr 2008 |
| 1513 | Danick Operating USA Inc | McKinney, TX 75072-9071 | Oil & Gas Operator | Oct 2022 |
| 1514 | Daniel Resource Dev Inc | Tomball, TX 77375-8919 | Oil & Gas Operator | Oct 2009 |
| 1515 | Daniel-Price Exploration Co | Tulsa, OK 74119 | Gas Operator | Apr 2011 |
| 1516 | Daniels Corporation, The | Seabrook, TX 77586 | Oil & Gas Operator | Jul 2025 |
| 1517 | Daniels Danny | Tishomingo, OK 73460-0853 | Oil Operator | Apr 2015 |
| 1518 | Daniels Earlene Inc | Follett, TX 79034-9736 | Oil & Gas Operator | Mar 2015 |
| 1519 | Daniels Energy | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 1520 | Danny Engel Operating LLC | Ada, OK 74820-1388 | Oil Operator | Feb 2025 |
| 1521 | Dar-Lon Operating Company | Lamont, OK 74643 | Oil & Gas Operator | Oct 2000 |
| 1522 | Darco Petroleum, Inc. | Bartlesville, OK 74005 | Oil & Gas Operator | Dec 2020 |
| 1523 | Darden Energy Corp | Hennessey, OK 73742 | Oil & Gas Operator | Jul 1999 |
| 1524 | Darling Dan Oil | | Oil & Gas Operator | Sep 2018 |
| 1525 | Darling Oil Corporation | Lamont, OK 74643 | Oil & Gas Operator | Apr 2025 |
| 1526 | Darnell Alma | Bristow, OK 74010 | Oil & Gas Operator | Jun 2000 |
| 1527 | Darnell Bobby J | Oklahoma City, OK 73112-8884 | Oil & Gas Operator | May 2025 |
| 1528 | Darrah Oil Company LLC | Wichita, KS 67201 | Oil & Gas Operator | Jul 2025 |
| 1529 | Darrell'S Drilling Inc | Konawa, OK 74849 | Oil Operator | Apr 2025 |
| 1530 | Darriel C Ray | | Oil Operator | Jun 2020 |
| 1531 | Dart Oil Properties | Enid, OK 73703 | Oil & Gas Operator | Oct 1992 |
| 1532 | Dash Operating LLC | Oklahoma City, OK 73118-5031 | Oil & Gas Operator | Apr 2025 |
| 1533 | Data Energy Inc | Evergreen, CO 80439 | Oil & Gas Operator | Jul 2018 |
| 1534 | Daube Company The | Ardmore, OK 73401 | Oil & Gas Operator | May 2025 |
| 1535 | Daube Exploration Company | Ardmore, OK 73402 | Oil & Gas Operator | Nov 2020 |
| 1536 | Dauco Petroleum Corporation | Rowlett, TX 75089-3066 | Oil & Gas Operator | Jan 2021 |
| 1537 | Davco Productions Inc | Springer, OK 73458-8191 | Oil & Gas Operator | Jun 2021 |
| 1538 | David E Morgan Inc | Danville, CA 94506-2035 | Oil & Gas Operator | Apr 2025 |
| 1539 | David L Greene II LLC | | Oil Operator | Apr 2025 |
| 1540 | David Ridley Oil LLC | Tecumseh, OK 74873 | Oil Operator | Apr 2025 |
| 1541 | Davidson Energy Inc | Perry, OK 73077 | Oil & Gas Operator | Apr 2025 |
| 1542 | Davidson Gene | Perry, OK 73077-0144 | Oil & Gas Operator | Aug 2014 |
| 1543 | Davies & Company | Tulsa, OK 74114 | Oil & Gas Operator | Nov 2000 |
| 1544 | Davis & Davis | | Oil & Gas Operator | Dec 2021 |
| 1545 | Davis & Davis Oil Properties Inc | Morris, OK 74445 | Oil Operator | Apr 2025 |
| 1546 | Davis & Hamilton Oil Company | Edmond, OK 73083-3670 | Oil Operator | Aug 2022 |
| 1547 | Davis Bros. Oil Producers, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2020 |
| 1548 | Davis Charles K | Morris, OK 74445-2201 | Oil & Gas Operator | Apr 2015 |
| 1549 | Davis Consulting LLC | Tulsa, OK 74104 | Oil Operator | Apr 2024 |
| 1550 | Davis Henry | Tulsa, OK 74135-3567 | Oil & Gas Operator | Dec 1994 |
| 1551 | Davis Jim L | Morris, OK 74445 | Oil & Gas Operator | Dec 2021 |
| 1552 | Davis Kendall | Bethany, OK 73008-4714 | Oil Operator | Aug 2016 |
| 1553 | Davis Operating Company | Elysian Field, TX 75642 | Oil & Gas Operator | Jul 2025 |
| 1554 | Davis William H | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2014 |
| 1555 | Davis William W | | Oil Operator | Jun 2024 |
| 1556 | Davis, Joe D. | Fort Smith, AR 72903 | Gas Operator | Mar 2015 |
| 1557 | Davis/Osage Corp | Tulsa, OK 74103 | Oil Operator | Jan 2001 |
| 1558 | Davon Drilling Company | Oklahoma City, OK 73113-0665 | Oil & Gas Operator | Mar 2015 |
| 1559 | Dawes, Tom E | | Oil Operator | Oct 2000 |
| 1560 | Dawson Geophysical Company | Midland, TX 79701 | Oil Operator | Aug 2024 |
| 1561 | Dawson Resources Inc | Franktown, CO 80116 | Oil & Gas Operator | Mar 2015 |
| 1562 | Dawson, Levi S | | Oil & Gas Operator | Mar 2015 |
| 1563 | Dawson-Markwell Exploration Co. | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2025 |
| 1564 | Daxin Energy Corporation | Seminole, OK 74868-2208 | Oil Operator | Jan 2013 |
| 1565 | Day Richard H | Wann, OK 74083-9608 | Oil Operator | Mar 2015 |
| 1566 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Jul 2025 |
| 1567 | DBS Oil Co /Osage Only | | Oil Operator | Apr 2025 |
| 1568 | Dby Investments LLC | Lago VIsta, TX 78645-8011 | Oil & Gas Operator | Nov 2016 |
| 1569 | DC Operating LLC | Yale, OK 74085-6662 | Oil & Gas Operator | Mar 2020 |
| 1570 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Apr 2025 |
| 1571 | DDC Oil LLC | Rockwall, TX 75087-5383 | Oil Operator | Mar 2020 |
| 1572 | DDD Exploration Inc | Amarillo, TX 79109 | Oil Operator | Jul 2025 |
| 1573 | Dead Fern Resources Inc | Sperry, OK 74073 | Oil & Gas Operator | May 2025 |
| 1574 | Dead Horse Oil & Gas LLC | Skiatook, OK 74070-9343 | Oil & Gas Operator | Jun 2015 |
| 1575 | Dean'S Well Servicing Inc | Ratliff City, OK 73481 | Oil & Gas Operator | May 2025 |
| 1576 | Dearing, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2021 |
| 1577 | Deaton, Gary L. Corporation | Oklahoma City, OK 73105 | Oil & Gas Operator | Mar 2015 |
| 1578 | Decalta International Corp | Denver, CO 80202 | Oil & Gas Operator | Mar 2015 |
| 1579 | Deck Exploration Inc | Perry, OK 73077-0303 | Oil & Gas Operator | May 2013 |
| 1580 | Deck Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2020 |
| 1581 | Dedica Energy Corporation | Mattoon, IL 61938 | Oil & Gas Operator | Mar 2008 |
| 1582 | Dee-Jay Exploration Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Jul 2025 |
| 1583 | Deep Rock LLC | Tulsa, OK 74137-1612 | Gas Operator | Jun 2022 |
| 1584 | Degge Oil Field Service | Okemah, OK 74859-0269 | Oil Operator | Nov 2014 |
| 1585 | Degge Oilfield Services LLC | Okemah, OK 74859 | Oil Operator | Jan 2025 |
| 1586 | Dehart Company (The) | Ardmore, OK 73402 | Oil & Gas Operator | May 2025 |
| 1587 | Deisenroth M Craig | Tulsa, OK 74104-6511 | Oil & Gas Operator | Feb 2025 |
| 1588 | Deka Exploration Inc | Oklahoma City, OK 73113-0057 | Oil & Gas Operator | Nov 2019 |
| 1589 | Delek Energy Systems Us Inc | Denver, CO 80202 | Oil & Gas Operator | Oct 2011 |
| 1590 | Dell Charles E | Cleveland, OK 74020-0090 | Oil & Gas Operator | Feb 2015 |
| 1591 | Delong Oil & Gas Services, Inc. | Cushing, OK 74023 | Oil & Gas Operator | Dec 2024 |
| 1592 | Delong Ralph J | Sapulpa, OK 74066 | Oil & Gas Operator | Nov 2005 |
| 1593 | Delong, Ralph S | | Oil & Gas Operator | Jul 2024 |
| 1594 | Delphi Oil And Gas LLC | Macomb, OK 74852 | Oil Operator | Apr 2025 |
| 1595 | Delta D Operations | Wilson, OK 73463 | Oil & Gas Operator | Jul 2014 |
| 1596 | Delta D Operations Inc | Ardmore, OK 73401-8678 | Oil & Gas Operator | Apr 2014 |
| 1597 | Delta Petroleum Inc | Houston, TX 77269-1007 | Oil & Gas Operator | May 2009 |
| 1598 | Dem Operations Inc | Lamont, OK 74643-5010 | Oil & Gas Operator | May 2025 |
| 1599 | Demco Oil & Gas Company | Blackwell, OK 74631-4203 | Oil & Gas Operator | Mar 2025 |
| 1600 | Demier Oil Company | Tulsa, OK 74105-2128 | Oil & Gas Operator | Nov 2008 |