| 1 | R & B Energy Co. | Ranger, TX 76470 | Oil & Gas Operator | Mar 2008 |
| 2 | Rainbow Seven Oil & Gas, Inc. | Ranger, TX 76470 | Oil & Gas Operator | Oct 2025 |
| 3 | Ram Oil And Gas, Inc. | Walsh, CO 81090 | Oil & Gas Operator | Oct 2025 |
| 4 | Ranger Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 5 | Ray Herring Estate | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 6 | Ray Herring Operating Co., LLC | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 7 | Red Fork Production, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Jun 2025 |
| 8 | Red Gap Oil & Gas LLC | Cisco, TX 76437 | Oil & Gas Operator | Oct 2025 |
| 9 | Red-Tex Petroleum, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Aug 2003 |
| 10 | Reef Exploration, Inc. (A-1) | Richardson, TX 75080 | Oil & Gas Operator | Oct 2006 |
| 11 | Resaca Resources, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |
| 12 | Richey, Ray Management Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Oct 2025 |
| 13 | Ridge Oil Company | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 14 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Oct 2025 |
| 15 | Riptide Energy LLC | Austin, TX 78701 | Oil & Gas Operator | Oct 2025 |
| 16 | Ro-Jo, Inc. | Highland VLG, TX 75077 | Oil & Gas Operator | Aug 2003 |
| 17 | Rob-Joe Gas & Oil Co. | Ranger, TX 76470 | Oil & Gas Operator | Oct 2025 |
| 18 | Robert C. Brower, LLC | Southlake, TX 76092 | Oil & Gas Operator | Oct 2025 |
| 19 | Robuck Petroleum, LLC | Nacogdoches, TX 75965 | Oil & Gas Operator | Oct 2025 |
| 20 | Roco Petroleum, Incorporated | Abilene, TX 79605 | Oil & Gas Operator | Oct 2025 |
| 21 | Rodessa Management, Inc. | Longview, TX 75606 | Oil & Gas Operator | May 1995 |
| 22 | Rodessa Operating Company | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Oct 2025 |
| 23 | Romac Oil Company, Inc. | Throckmorton, TX 76483 | Oil & Gas Operator | Oct 2025 |
| 24 | Rominger, R.L. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jan 2015 |
| 25 | Ronning Gas And Oil LLC | Mesa, AZ 85203 | Oil & Gas Operator | Oct 2025 |
| 26 | Royal Petroleum Corp. | Dallas, TX 75229 | Oil & Gas Operator | Jan 2025 |
| 27 | Royal Texan Resources Co. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 28 | RSD Minerals LLC | Wichita, KS 67206 | Oil Operator | Jun 2025 |
| 29 | Ruff Drilling Company | Albany, TX 76430 | Oil & Gas Operator | Dec 2019 |
| 30 | Rusk Co. Well Service Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 31 | Russell Bros. Oil & Gas, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 32 | Russell Brothers Oil & Gas | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2004 |
| 33 | Russell, T. Operating Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2005 |
| 34 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | Oct 2025 |
| 35 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |