| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Hall-Houston Oil Company | Houston, TX 77002 | Oil & Gas Operator | Oct 2002 |
| 2 | Hess Corporation, A De Corp. | Oil & Gas Operator | Oct 2006 | |
| 3 | Houston Energy & Dev. Inc. | Oil & Gas Operator | Mar 1994 | |
| 4 | Huffco Petroleum Corporation | Oil & Gas Operator | Jul 1988 |