| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | D And B Brine Inc | Oil Operator | Oct 2025 | |
| 2 | D T E Gas And Oil Co | Gas Operator | May 2007 | |
| 3 | D T E Gas Company | Oil & Gas Operator | Jun 1999 | |
| 4 | Dart Oil & Gas Corporation | Mason, MI 48854 | Oil & Gas Operator | Jun 2018 |
| 5 | Deep River Energy LLC | Oil Operator | Sep 2025 | |
| 6 | Dejong John B | Oil Operator | Dec 2024 | |
| 7 | Delta Oil Co Inc | Oil & Gas Operator | Oct 2023 | |
| 8 | Delta Oil Co Inc And Great Lakes Niagaran | Oil & Gas Operator | Dec 1987 | |
| 9 | Deni Frank R | Oil Operator | Dec 2022 | |
| 10 | Devonian Energy Inc | Gas Operator | Jun 2025 | |
| 11 | Devonian Energy Inc And Muzyl Oil Corp | Oil & Gas Operator | Aug 1999 | |
| 12 | Diamond Petroleum LLC | Oil & Gas Operator | Dec 2005 | |
| 13 | Dixon Exploration Inc | Abilene, TX 79604 | Oil & Gas Operator | Oct 2019 |
| 14 | Dome Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 15 | Dominion Midwest Energy Inc | Oil & Gas Operator | Dec 2007 | |
| 16 | Dominion Natural Resources LLC | Dallas, TX 75367 | Oil & Gas Operator | Dec 2025 |
| 17 | Don Yohe Enterprises And Devonian Energy Inc | Gas Operator | Dec 1999 | |
| 18 | Don Yohe Enterprises Inc. | Armada, MI 48005 | Oil & Gas Operator | Apr 2018 |
| 19 | Duff Oil Co | Oil & Gas Operator | Aug 2000 | |
| 20 | Duncan Oil Inc | Denver, CO 80210 | Oil & Gas Operator | Jun 2016 |
| 21 | Dynamic Development Inc | Oil & Gas Operator | Oct 2025 |