| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | McPhearson, Richard E. | Oil Operator | Mar 1956 | |
| 2 | Midroc Operating Co. & Watkins, H. Vaughan, Jr. | Oil & Gas Operator | Feb 2010 | |
| 3 | Midroc Operating Co. & Watkins, H. Vaughan, Jr. & Placid Oil Co. | Oil & Gas Operator | May 1991 | |
| 4 | Midroc Operating Company | Oil & Gas Operator | Apr 2013 |