| 1 | R & B Oil Company, LLC | Dickinson, TX 77539 | Oil & Gas Operator | Dec 2024 |
| 2 | Radco Operations | Sourlake, TX 77659 | Oil Operator | Nov 2002 |
| 3 | Radco Operations, L.P. | Sourlake, TX 77659 | Oil Operator | Dec 2024 |
| 4 | Radley Electric, Inc. | Sourlake, TX 77659 | Oil & Gas Operator | Oct 2001 |
| 5 | Radley Equipment | Sourlake, TX 77659 | Oil & Gas Operator | May 2000 |
| 6 | Radley, R. R. | Sourlake, TX 77659 | Oil & Gas Operator | Mar 2008 |
| 7 | Radley, Terry R., Operator | Sourlake, TX 77659 | Oil & Gas Operator | Apr 2006 |
| 8 | Rainbow Energy Corporation | Midland, TX 79701 | Oil & Gas Operator | Nov 2002 |
| 9 | Reef Exploration, Inc. (A-1) | Richardson, TX 75080 | Oil & Gas Operator | Oct 2006 |
| 10 | Reichmann Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Dec 2024 |
| 11 | Rein Pusher Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Dec 2024 |
| 12 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | Dec 2024 |
| 13 | Rex Energy Operating Corp. | State College, PA 16801 | Oil & Gas Operator | Jun 2012 |
| 14 | Rheaco Oil Company, LTD. | Sourlake, TX 77659 | Oil Operator | Dec 2024 |
| 15 | Richman Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2006 |
| 16 | Rio Bravo Oil Company | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2002 |
| 17 | Roosth Production Co. | Tyler, TX 75711 | Oil & Gas Operator | Dec 2024 |
| 18 | Rotation, Incorporated | Houston, TX 77057 | Oil & Gas Operator | Mar 2023 |
| 19 | Rover Petroleum Operating, LLC | Plano, TX 75075 | Oil & Gas Operator | Dec 2024 |
| 20 | Royal Oil & Gas Corp. | Indiana, PA 15701 | Oil & Gas Operator | Apr 2014 |
| 21 | Royal Petroleum | Baytown, TX 77521 | Oil & Gas Operator | Aug 2003 |
| 22 | Royal Production Company, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2024 |