| 1 | R & R Entertainment Inc. | | Oil & Gas Operator | Dec 2011 |
| 2 | R&R Resources LLC | | Oil & Gas Operator | Apr 2025 |
| 3 | R. J. Bellevue | | Oil & Gas Operator | Apr 2025 |
| 4 | R. Scott Price | | Oil & Gas Operator | Dec 1994 |
| 5 | R. W. Henry | | Oil & Gas Operator | Dec 1999 |
| 6 | R. W. Shull | | Oil & Gas Operator | Dec 1986 |
| 7 | Raak-Wilson Properties | | Oil & Gas Operator | Dec 1999 |
| 8 | Randy J. & Deborah R. Allison | | Oil & Gas Operator | Dec 2003 |
| 9 | Rare Petro Exploration LLC | | Oil & Gas Operator | May 2025 |
| 10 | Razar Resources | | Oil & Gas Operator | Dec 2000 |
| 11 | Reabold California LLC | | Oil & Gas Operator | Apr 2025 |
| 12 | Redbank Oil Co. | | Oil Operator | Apr 2025 |
| 13 | Redbank Oil Co. Operator | | Oil Operator | Apr 2025 |
| 14 | Reef Ridge Energy Company LLC | | Oil & Gas Operator | Apr 2025 |
| 15 | Remora Operating Ca LLC | | Oil & Gas Operator | Dec 2020 |
| 16 | Renaissance Petroleum LLC | | Oil & Gas Operator | Apr 2025 |
| 17 | Res-Tech Inc. | | Oil & Gas Operator | Apr 2025 |
| 18 | Reserve Petroleum California Inc. | | Oil & Gas Operator | Apr 2025 |
| 19 | Resource Engineering | | Gas Operator | Nov 2024 |
| 20 | Richard P. Kelter | | Oil & Gas Operator | Dec 1996 |
| 21 | Richard Steltzner | | Gas Operator | Dec 1992 |
| 22 | Richard Young & Associates | | Oil & Gas Operator | Dec 2004 |
| 23 | Rincon Island Limited Partnership | | Oil & Gas Operator | Nov 2022 |
| 24 | Rincon Oil Co. | | Oil & Gas Operator | Dec 1990 |
| 25 | Rio Bravo Poso | | Oil & Gas Operator | Dec 2009 |
| 26 | RMR Energy Resources | | Oil Operator | Apr 2025 |
| 27 | RMS Monte Christo, LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Mar 2023 |
| 28 | Road Oil Sales Inc. | Tyler, TX 75711 | Oil Operator | Dec 1984 |
| 29 | Robert A. Cohan | | Oil & Gas Operator | Jan 2018 |
| 30 | Robert D. VIgue | | Oil Operator | Dec 2000 |
| 31 | Robert E. & Ruby C. Beasley Trustees | | Oil & Gas Operator | Dec 1990 |
| 32 | Robert Sumpf | | Gas Operator | Dec 1990 |
| 33 | Robert W. Berry Inc. | | Gas Operator | Dec 1988 |
| 34 | Robert W. Lee Investments | | Oil & Gas Operator | Dec 1998 |
| 35 | Rohrig Petroleum Co. | | Oil & Gas Operator | Dec 1998 |
| 36 | Romara Energy Inc. | | Oil & Gas Operator | Dec 2017 |
| 37 | Rose Katherine Stone | | Oil & Gas Operator | Dec 2025 |
| 38 | Rosemain 031 LLC | | Oil & Gas Operator | Apr 2025 |
| 39 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | Jul 2025 |
| 40 | Rothschild Oil Co. | | Oil Operator | Dec 1982 |
| 41 | Rountree/Wright Enterprises LLC | | Oil Operator | May 2025 |
| 42 | Roya Resources LLC | | Oil & Gas Operator | Mar 2022 |
| 43 | Royale Energy Inc | San Diego, CA 92108-4518 | Oil & Gas Operator | May 2025 |