| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Quest Research & Dev. Corp. | Weatherford, TX 76086 | Oil & Gas Operator | Oct 2025 |
| 2 | Quintana Minerals Corporation | Houston, TX 77002 | Oil & Gas Operator | Jan 2003 |
| 3 | Quintana Pet. Corp. | Refugio, TX 78377 | Oil & Gas Operator | Dec 2000 |
| 4 | Quintana Petroleum Services | Houston, TX 77253 | Oil & Gas Operator | Jul 1997 |