| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | R & C Petroleum, Inc. | Flint, TX 75762 | Oil & Gas Operator | Apr 2024 |
| 2 | R & H Oil & Gas, Inc. | Oil & Gas Operator | Apr 1992 | |
| 3 | R. I. P. Operating | Oil Operator | Oct 1986 | |
| 4 | Radiant Oil & Gas Operating Company, Inc | Oil & Gas Operator | Aug 2015 | |
| 5 | Radzewicz Expl. & DRLG. Corp. | Oil & Gas Operator | Mar 2011 | |
| 6 | Radzewicz Operating Corp. | Oil & Gas Operator | Oct 2017 | |
| 7 | Ringer Oil Co Inc | Oil & Gas Operator | Aug 1989 | |
| 8 | Rock Oil, Inc. | Oil Operator | Nov 1989 | |
| 9 | Roppolo Petroleum Co. | Oil & Gas Operator | Jan 2000 |