| 1 | R & B Energy Co. | Ranger, TX 76470 | Oil & Gas Operator | Mar 2008 |
| 2 | R R Operation Inc | Cross Plains, TX 76443 | Oil & Gas Operator | Apr 2004 |
| 3 | Rainbow Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2007 |
| 4 | Rainbow Seven Oil & Gas, Inc. | Ranger, TX 76470 | Oil & Gas Operator | Mar 2025 |
| 5 | Red Gap Oil & Gas LLC | Cisco, TX 76437 | Oil & Gas Operator | Mar 2025 |
| 6 | Red River Crude Oil LLC | Houston, TX 77081 | Oil Operator | Dec 2024 |
| 7 | Regal Operating | Cisco, TX 76437 | Oil & Gas Operator | Mar 2008 |
| 8 | Regency Petroleum Co. | Irving, TX 75016 | Oil & Gas Operator | Aug 2002 |
| 9 | Regency Petroleum Co. Of New Mex | Coppell, TX 75019 | Oil & Gas Operator | Apr 2008 |
| 10 | Reh Oil And Gas, LLC. | Pratt, KS 67124 | Oil & Gas Operator | Apr 2019 |
| 11 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Mar 2025 |
| 12 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | Mar 2025 |
| 13 | Rhodes Drilling Company | Abilene, TX 79608 | Oil & Gas Operator | Sep 2000 |
| 14 | Rhonda Operating Company | Midland, TX 79710 | Oil & Gas Operator | Aug 2017 |
| 15 | Rhyne, J.V. | Cisco, TX 76437 | Oil & Gas Operator | Mar 2025 |
| 16 | Richey, Ray Management Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Mar 2025 |
| 17 | Ridge Oil Company | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2025 |
| 18 | Ridgeway Exco, Inc. | San Antonio, TX 78279 | Oil & Gas Operator | Mar 1996 |
| 19 | Rife Energy Operating, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Mar 2025 |
| 20 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2025 |
| 21 | Rife, M. O., Jr. | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 1998 |
| 22 | Ringo Rig LLC | Coleman, TX 76834 | Oil & Gas Operator | Mar 2025 |
| 23 | Rister Oil&Gas International LLC | Eastland, TX 76448 | Oil & Gas Operator | Mar 2025 |
| 24 | Rister, Dewey | Avoca, TX 79503 | Oil & Gas Operator | Mar 2025 |
| 25 | RJKB Foster Operating LLC | Cisco, TX 76437 | Oil & Gas Operator | Mar 2025 |
| 26 | Robertson, T. L. Operating Co. | Cross Plains, TX 76443 | Oil & Gas Operator | May 2004 |
| 27 | Robinson Oil & Gas, Inc. | Chico, TX 76431 | Oil & Gas Operator | Aug 2003 |
| 28 | Robinson Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Aug 2012 |
| 29 | Robinson, Irvin | Abilene, TX 79608 | Oil & Gas Operator | May 1999 |
| 30 | Rock Operating | Abilene, TX 79608 | Oil & Gas Operator | Mar 2025 |
| 31 | Rodman Petroleum Corp. | Odessa, TX 79768 | Oil & Gas Operator | Jul 2023 |
| 32 | Roemer Oil Company | Denver, CO 80202 | Oil & Gas Operator | Nov 1998 |
| 33 | Rollo Resources, LLC | Granbury, TX 76049 | Gas Operator | Mar 2025 |
| 34 | Ronning Gas And Oil LLC | Mesa, AZ 85203 | Oil & Gas Operator | Mar 2025 |
| 35 | Ross Engineering, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Mar 2025 |
| 36 | Roxanna Oil Company | Oklahoma City, OK 73120-2717 | Oil Operator | Aug 2016 |
| 37 | RSD Minerals LLC | Wichita, KS 67206 | Oil Operator | Oct 2024 |