| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | D & L Energy Inc | Canton, OH 44718 | Oil & Gas Operator | Dec 2016 |
| 2 | Dannic Energy Corp | Indiana, PA 15701-1532 | Oil & Gas Operator | Dec 2024 |
| 3 | Deer Run Oil & Gas LLC | Albion, PA 16401-8306 | Gas Operator | Dec 2024 |
| 4 | Diamond Energy Partners LLC | Collinsville, OK 74021 | Oil & Gas Operator | Dec 2024 |
| 5 | Diversified Oil & Gas LLC | Jackson Center, PA 16133 | Oil & Gas Operator | Jan 2025 |
| 6 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Mar 2025 |
| 7 | DJR Well Services Inc | McDonald, OH 44437 | Oil & Gas Operator | Dec 2024 |
| 8 | Douglas Oil & Gas Inc | Canonsburg, PA 15317 | Gas Operator | Dec 2003 |
| 9 | Douglas Oil & Gas LP | State College, PA 16803 | Oil & Gas Operator | Dec 2007 |