| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | D & S Energy Corp | Oil & Gas Operator | Dec 2018 | |
| 2 | Dale R & George W Magee | Duke Center, PA 16729-0217 | Oil & Gas Operator | Dec 2010 |
| 3 | Dallas Energy LLC | Bradford, PA 16701 | Oil & Gas Operator | Dec 2025 |
| 4 | David L Hill | Bradford, PA 16701-0309 | Oil & Gas Operator | Dec 2025 |
| 5 | Davidson Roger D | Clarendon, PA 16313-4532 | Oil & Gas Operator | Dec 2025 |
| 6 | DH Production | Albany, TX 76430 | Oil Operator | Dec 2005 |
| 7 | Diversified Oil & Gas LLC | Jackson Center, PA 16133 | Oil & Gas Operator | Apr 2026 |
| 8 | DL Resources Inc | Oil & Gas Operator | Dec 2025 | |
| 9 | Double J Resources Inc | Bradford, PA 16701-6506 | Oil & Gas Operator | Dec 2022 |