| 1 | R & D Operating | Early, TX 76803 | Oil & Gas Operator | Mar 2008 |
| 2 | R & D Operating, Inc. | Early, TX 76802 | Oil & Gas Operator | Apr 2024 |
| 3 | R & L Producing Co., Inc. | Hamilton, TX 76531 | Oil & Gas Operator | Nov 1997 |
| 4 | R & P Operating | Tuscola, TX 79562 | Oil & Gas Operator | Jun 1997 |
| 5 | R & R Well Service | Fort Worth, TX 76120 | Oil & Gas Operator | Jan 2005 |
| 6 | R & R Well Service, Inc. | Arlington, TX 76012 | Oil & Gas Operator | Apr 2024 |
| 7 | R R Operation Inc | Cross Plains, TX 76443 | Oil & Gas Operator | Apr 2004 |
| 8 | Radius Operating, LLC | Round Rock, TX 78664 | Oil & Gas Operator | Apr 2024 |
| 9 | Ratts, Robert V. Inc. | Bedford, TX 76021 | Oil & Gas Operator | Aug 2003 |
| 10 | Rayco Operating, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 11 | Reach Oil | Brownwood, TX 76801 | Oil & Gas Operator | Apr 2024 |
| 12 | Rebco Oil, Inc. | Desdemona, TX 76445 | Oil Operator | Apr 2024 |
| 13 | Red-Tex Petroleum, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Aug 2003 |
| 14 | Redwood Operating, Inc. | Houston, TX 77058 | Oil & Gas Operator | Apr 2024 |
| 15 | Regent Oil & Gas Company, L.P. | Dallas, TX 75225 | Oil & Gas Operator | Sep 2006 |
| 16 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | Apr 2024 |
| 17 | Revard Petroleum, L.L.C. | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2024 |
| 18 | Rhodes Drilling Company | Abilene, TX 79608 | Oil & Gas Operator | Sep 2000 |
| 19 | Rhonda Operating Company | Midland, TX 79710 | Oil & Gas Operator | Aug 2017 |
| 20 | Rhyne, J.V. | Cisco, TX 76437 | Oil & Gas Operator | Apr 2024 |
| 21 | Rice Drilling Company | Santa Anna, TX 76878 | Oil & Gas Operator | Apr 2024 |
| 22 | Rice, James D. | Santa Anna, TX 76878 | Oil & Gas Operator | Sep 2007 |
| 23 | Richardson Resources Inc | Brownwood, TX 76801 | Oil & Gas Operator | Apr 2024 |
| 24 | Richardson, Bud II | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 25 | Richey Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Apr 2024 |
| 26 | Richey, Ray Management Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Apr 2024 |
| 27 | Richman Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2006 |
| 28 | Rimfire Resources, LLC | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 29 | Ringo Rig LLC | Coleman, TX 76834 | Oil & Gas Operator | Apr 2024 |
| 30 | Robertson, French M. Oil Co. | Abilene, TX 79608 | Oil & Gas Operator | Mar 1995 |
| 31 | Rockland Oil Company | Addison, TX 75001 | Oil & Gas Operator | Feb 2024 |
| 32 | Rockwood Resources Inc | Coleman, TX 76834 | Oil & Gas Operator | Apr 2024 |
| 33 | Roco Petroleum, Incorporated | Abilene, TX 79605 | Oil & Gas Operator | Apr 2024 |
| 34 | Rod, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Mar 2008 |
| 35 | Ross Engineering, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Apr 2024 |
| 36 | Ross, Dwight M. DRLG. Co., Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2024 |
| 37 | Rosson, Robert K. | Novice, TX 79538 | Oil & Gas Operator | Aug 2003 |
| 38 | Rough Creek Exploration, Inc. | Santa Anna, TX 76878 | Oil & Gas Operator | Jan 1996 |
| 39 | Royalty Land & Dev. Co., Inc. | Wolfforth, TX 79382 | Oil & Gas Operator | Apr 2024 |
| 40 | Ruby Operating Company, Inc | Clyde, TX 79510 | Oil & Gas Operator | Apr 2024 |
| 41 | Ruthson Energy, Inc. | Judson, TX 75660 | Oil Operator | Apr 2024 |
| 42 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | Apr 2024 |