| 7601 | Dedica Energy Corporation | Mattoon, IL 61938 | Oil & Gas Operator | Mar 2008 |
| 7602 | Dee'S Oil | Wellington, TX 79095 | Oil & Gas Operator | Mar 2008 |
| 7603 | Dee-Jay Exploration Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Aug 2026 |
| 7604 | Deem, J. F. Oil & Gas, LLC | Parkersburg, WV 26104 | Oil & Gas Operator | Dec 2021 |
| 7605 | Deem, W. A. | Harrisville, WV 26362-7878 | Oil & Gas Operator | Dec 2001 |
| 7606 | Deen Drilling Company | Archer City, TX 76351 | Oil & Gas Operator | Aug 2026 |
| 7607 | Deep Creek Adventures, Co. | | Oil Operator | Dec 2018 |
| 7608 | Deep Ford Gas Company | Charleston, WV 25321-0169 | Gas Operator | Dec 2021 |
| 7609 | Deep Gully Oil LLC | Houston, TX 77292 | Oil Operator | Aug 2026 |
| 7610 | Deep Hole Oil LLC | Ashland, KY 41105 | Oil & Gas Operator | Dec 2020 |
| 7611 | Deep Reef Industries | Amarillo, TX 79101 | Oil & Gas Operator | Jan 2004 |
| 7612 | Deep Resources LLC | Holmesville, OH 44633 | Oil & Gas Operator | Dec 2025 |
| 7613 | Deep River Energy LLC | | Oil Operator | Jun 2026 |
| 7614 | Deep Rock LLC | Tulsa, OK 74137-1612 | Gas Operator | Jun 2022 |
| 7615 | Deep Rock Resources, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2026 |
| 7616 | Deep South Production | | Oil Operator | Dec 2023 |
| 7617 | Deeprock Disposal Services, LLC | | Oil & Gas Operator | Sep 1991 |
| 7618 | Deepwell Co | | Oil Operator | Jul 1989 |
| 7619 | Deer Creek Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 2019 |
| 7620 | Deer Creek Oil & Gas | Atlanta, GA 30326-1000 | Gas Operator | Dec 1987 |
| 7621 | Deer Oil & Gas | Marietta, OH 45750 | Oil & Gas Operator | Dec 2025 |
| 7622 | Deer Run Oil & Gas LLC | Albion, PA 16401-8306 | Gas Operator | Dec 2025 |
| 7623 | Deer Run Oil Lease, LLC | Caney, KS 67333 | Oil Operator | Apr 2026 |
| 7624 | Dees Production LLC | | Oil Operator | Dec 2024 |
| 7625 | Defranco Oil Account | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2004 |
| 7626 | Deg Energy, Inc. | Magnolia, TX 77354 | Oil & Gas Operator | Feb 2007 |
| 7627 | Degaugh Well Service Inc | | Oil Operator | Jul 1989 |
| 7628 | Degge Oil Field Service | Okemah, OK 74859-0269 | Oil Operator | Nov 2014 |
| 7629 | Degge Oilfield Services LLC | Okemah, OK 74859 | Oil Operator | Mar 2026 |
| 7630 | Degroot, Garry | South Dayton, NY 14138 | Gas Operator | Dec 2025 |
| 7631 | Deguello Operating LLC | College Sta, TX 77840 | Oil & Gas Operator | Aug 2026 |
| 7632 | Dehart Company (The) | Ardmore, OK 73402 | Oil & Gas Operator | May 2026 |
| 7633 | Deisenroth M Craig | Tulsa, OK 74104-6511 | Oil & Gas Operator | May 2026 |
| 7634 | Deitz Edith | Clarion, PA 16214-9416 | Oil & Gas Operator | Dec 2009 |
| 7635 | Deitz Gas & Oil Inc | Clarion, PA 16214-3215 | Oil & Gas Operator | Dec 2024 |
| 7636 | Dejong John B | | Oil Operator | Dec 2025 |
| 7637 | Deka Exploration Inc | Oklahoma City, OK 73113-0057 | Oil & Gas Operator | Nov 2019 |
| 7638 | Dekalb Energy Company | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 1996 |
| 7639 | Dekasco, Inc. | | Oil & Gas Operator | May 1990 |
| 7640 | Del Amo Energy Co. | | Oil & Gas Operator | Dec 1987 |
| 7641 | Del Energy, Inc | | Oil Operator | Dec 2014 |
| 7642 | Del Mar | Holliday, TX 76366 | Oil & Gas Operator | Aug 2026 |
| 7643 | Del Mar Energy, Inc. | Van Alstyne, TX 75495 | Oil & Gas Operator | Aug 2026 |
| 7644 | Del Mar Exploration Company | Houston, TX 77006 | Oil & Gas Operator | Jan 2014 |
| 7645 | Del Oil & Gas Corp | | Oil Operator | Jul 1981 |
| 7646 | Del Petroleum Corporation | Dallas, TX 75219 | Oil & Gas Operator | Jan 2012 |
| 7647 | Del Rio Production Co. | Gainesville, TX 76240 | Oil Operator | Mar 2019 |
| 7648 | Del-Rio Resources Inc | Vernal, UT 84079 | Oil & Gas Operator | Jan 2018 |
| 7649 | Delaware Davis Petroleum Corp. | Houston, TX 77056 | Oil & Gas Operator | Jan 2000 |
| 7650 | Delaware Dyche Corp. | Hutchinson, KS 67501 | Oil Operator | Jan 2010 |
| 7651 | Delaware Ecco Petroleum Inc. | Rockwall, TX 75087 | Oil & Gas Operator | Jul 2001 |
| 7652 | Delbert A. Dodson | | Oil Operator | Aug 2002 |
| 7653 | Delcar, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1995 |
| 7654 | Delco Operating Company LP | Houston, TX 77056 | Oil & Gas Operator | May 2020 |
| 7655 | Delek Energy Systems Us, Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2011 |
| 7656 | Delfin Operating, LLC | Dallas, TX 75243 | Oil & Gas Operator | Aug 2026 |
| 7657 | Delgado, Emil A | San Antonio, TX 78223 | Oil & Gas Operator | Sep 2016 |
| 7658 | Delhi Gas Pipeli | | Gas Operator | Aug 1998 |
| 7659 | Delhi Gas Pipeline Corporation | Palestine, TX 75802 | Oil & Gas Operator | Feb 1998 |
| 7660 | Delhi Pipeline | | Oil & Gas Operator | Sep 1999 |
| 7661 | Delhi-Taylor Oil Corp | | Oil & Gas Operator | Dec 1974 |
| 7662 | Delhi-Trading LLC | Durango, CO 81301 | Oil & Gas Operator | Jun 2026 |
| 7663 | Dell Charles E | Cleveland, OK 74020-0090 | Oil & Gas Operator | Feb 2015 |
| 7664 | Dell-Ray Investments, Inc. | Nickerson, KS 67561 | Oil Operator | Dec 2019 |
| 7665 | Delmar Operating, Inc. | Houston, TX 77010 | Oil & Gas Operator | Oct 1996 |
| 7666 | Delone, M S | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2025 |
| 7667 | Delong Oil & Gas Services, Inc. | Cushing, OK 74023 | Oil & Gas Operator | Mar 2026 |
| 7668 | Delong Ralph J | Sapulpa, OK 74066 | Oil & Gas Operator | Nov 2005 |
| 7669 | Delong, Horace | Graham, TX 76450 | Oil & Gas Operator | Aug 2026 |
| 7670 | Delong, Ralph S | | Oil & Gas Operator | Jun 2025 |
| 7671 | Delozier, Orval & Stevens, Floyd, A General Partnership | Dewey, OK 74029 | Oil Operator | Nov 2009 |
| 7672 | Delphi International, Inc. | Tulsa, OK 74104 | Oil Operator | Mar 2026 |
| 7673 | Delphi Oil And Gas LLC | Macomb, OK 74852 | Oil Operator | Mar 2026 |
| 7674 | Delphi Oil Inc. | | Oil & Gas Operator | May 2026 |
| 7675 | Delray Oil, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Aug 2026 |
| 7676 | Delta C02, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2021 |
| 7677 | Delta D Operations | Wilson, OK 73463 | Oil & Gas Operator | Jul 2014 |
| 7678 | Delta D Operations Inc | Ardmore, OK 73401-8678 | Oil & Gas Operator | Apr 2014 |
| 7679 | Delta Development Co. Inc. | | Oil & Gas Operator | Dec 1988 |
| 7680 | Delta Energy Resources, Inc. | | Oil & Gas Operator | Jun 1990 |
| 7681 | Delta Expl.& Development Corp. | | Oil & Gas Operator | Jan 2025 |
| 7682 | Delta Exploration Company Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2026 |
| 7683 | Delta Oil | Holliday, TX 76366 | Oil & Gas Operator | Sep 2005 |
| 7684 | Delta Oil & Gas Company | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2003 |
| 7685 | Delta Oil & Gas LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2026 |
| 7686 | Delta Oil Co Inc | | Oil & Gas Operator | Oct 2023 |
| 7687 | Delta Oil Co Inc And Great Lakes Niagaran | | Oil & Gas Operator | Dec 1987 |
| 7688 | Delta Oil Corp | | Oil & Gas Operator | Dec 2005 |
| 7689 | Delta Operating Company | | Oil Operator | Mar 1987 |
| 7690 | Delta Operating Corporation | | Oil & Gas Operator | Feb 2024 |
| 7691 | Delta Petro Corp Of Colorado | Houston, TX 77010-3089 | Gas Operator | Dec 2003 |
| 7692 | Delta Petroleum Company | Houston, TX 77267 | Oil Operator | Aug 1996 |
| 7693 | Delta Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 7694 | Delta Petroleum Corp Of Co | | Oil & Gas Operator | Oct 2010 |
| 7695 | Delta Petroleum Inc | Houston, TX 77269-1007 | Oil & Gas Operator | May 2009 |
| 7696 | Delta Producers, Inc | Greenville, MS 38703 | Oil & Gas Operator | Dec 2023 |
| 7697 | Delta Production Services, LLC | | Oil & Gas Operator | Aug 2002 |
| 7698 | Delta Royalties LLC | | Oil & Gas Operator | Dec 2024 |
| 7699 | Delta Sierra Oil & Gas LLC | | Gas Operator | Jan 2018 |
| 7700 | Deltaus Corporation | | Oil & Gas Operator | Oct 1985 |