| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Dakota Opr Co Inc | Indiana, PA 15701-0444 | Oil & Gas Operator | Dec 1999 |
| 2 | Dannic Energy Corp | Indiana, PA 15701-1532 | Oil & Gas Operator | Dec 2025 |
| 3 | Deer Run Oil & Gas LLC | Albion, PA 16401-8306 | Gas Operator | Dec 2025 |
| 4 | Devonian Resources Inc | Pikeville, KY 41502 | Oil & Gas Operator | Dec 2025 |
| 5 | Diversified Oil & Gas LLC | Jackson Center, PA 16133 | Oil & Gas Operator | Apr 2026 |