| 1 | R & B Oil Company, LLC Of Texas | | Oil & Gas Operator | Jan 2025 |
| 2 | R & C Petroleum, Inc. | Flint, TX 75762 | Oil & Gas Operator | Apr 2026 |
| 3 | R & D Holdings, Inc. | | Gas Operator | Feb 1991 |
| 4 | R & F Land Co., Inc. | | Oil & Gas Operator | Jan 2000 |
| 5 | R & H Oil & Gas Inc | | Oil & Gas Operator | Apr 1992 |
| 6 | R & M Oil Co. | Fredonia, KS 66736 | Oil & Gas Operator | Aug 2002 |
| 7 | R & P Oil Co. | | Oil & Gas Operator | Jul 2014 |
| 8 | R & R Oil Company | Pampa, TX 79065 | Oil & Gas Operator | Jul 2002 |
| 9 | R & R Production Company | | Oil Operator | Feb 2000 |
| 10 | R & R Production, Inc. | | Oil & Gas Operator | Feb 1990 |
| 11 | R A Nobile | | Oil & Gas Operator | Nov 1989 |
| 12 | R C Henderson Jr | | Oil Operator | Dec 1990 |
| 13 | R D V, Inc. | | Oil Operator | May 2004 |
| 14 | R H Energy Co Inc | | Oil & Gas Operator | Sep 1989 |
| 15 | R L Kelly, SR. | | Oil Operator | Feb 2009 |
| 16 | R L Operating Co LLC | | Oil Operator | Aug 2024 |
| 17 | R&F Operating Company | Carthage, TX 75633 | Oil Operator | Apr 2026 |
| 18 | R&R Resources Corporation | Houston, TX 77056 | Oil & Gas Operator | Dec 2015 |
| 19 | R. & R. Exploration, Inc. | Denton, TX 76202 | Oil Operator | Nov 1993 |
| 20 | R. A. Bridges | | Oil Operator | Jun 1991 |
| 21 | R. A. Campbell Company | | Oil & Gas Operator | Nov 1995 |
| 22 | R. C. Production | | Oil & Gas Operator | Nov 2024 |
| 23 | R. D. Briscoe, Inc. | | Oil & Gas Operator | Nov 2024 |
| 24 | R. E. Markham | | Oil & Gas Operator | Mar 1995 |
| 25 | R. E. Markham Et Al | | Gas Operator | Jun 1996 |
| 26 | R. H. Davis | | Oil Operator | Apr 2001 |
| 27 | R. J. Davenport | | Oil Operator | May 1985 |
| 28 | R. L. Burns Corp. | | Oil & Gas Operator | Feb 1982 |
| 29 | R. L. Davis | | Oil Operator | Dec 2024 |
| 30 | R. L. Dempsey | | Oil Operator | Jun 1985 |
| 31 | R. M. Hobbs | | Oil Operator | Sep 2000 |
| 32 | R. Pannell Oil Company | Kilgore, TX 75663 | Oil Operator | Jan 2025 |
| 33 | R. V. Drummond, Et Al | | Oil Operator | Nov 1999 |
| 34 | R. W. Ellington, Jr. | | Gas Operator | May 1985 |
| 35 | R. W. Tyson Producing Co.,Inc | | Oil & Gas Operator | Dec 2024 |
| 36 | R.A. Campbell & Dale Expl | | Oil Operator | Nov 1995 |
| 37 | R.C.Bertolet & Serio Expl Co | | Oil & Gas Operator | Nov 1992 |
| 38 | R.Chisum, Jr. & L. Shepherd | | Oil & Gas Operator | Nov 2001 |
| 39 | R.E. McDowell & Dave Gammill | | Oil Operator | May 1978 |
| 40 | R/C Holdings, Inc. | | Oil & Gas Operator | Dec 1991 |
| 41 | R360 Environmental Solutions Of La, LLC | | Oil Operator | Jan 2025 |
| 42 | Rabalais Oil And Gas, Inc. | | Oil & Gas Operator | Sep 2023 |
| 43 | Rabb Contracting Company, L.L.C. | | Oil Operator | Nov 2024 |
| 44 | Rabb Resources, Limited | | Oil Operator | Dec 2002 |
| 45 | Rabun Resources | | Gas Operator | Jan 2025 |
| 46 | Rabwin Oil & Gas, Inc. | | Oil & Gas Operator | Nov 1991 |
| 47 | Radco Energy LLC | | Oil Operator | Jan 2025 |
| 48 | Radiant Oil & Gas Operating Company, Inc | | Oil & Gas Operator | Aug 2015 |
| 49 | Radke Oil Co., Inc. | | Oil Operator | May 2001 |
| 50 | Radzewicz & Assoc-R.C.Bertolet | | Oil Operator | Oct 1985 |
| 51 | Radzewicz Operating Corporation | | Oil & Gas Operator | Oct 2017 |
| 52 | Ralph L. Leaderbrand | | Oil & Gas Operator | Dec 1996 |
| 53 | Ram Energy LLC (Ok) | | Oil & Gas Operator | Feb 2018 |
| 54 | Ram Management Company, Inc. | | Oil & Gas Operator | Sep 1984 |
| 55 | Ram Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2012 |
| 56 | Ramco Exploration, Inc. | | Oil & Gas Operator | Feb 1998 |
| 57 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 58 | Ramco Operating Company | Tulsa, OK 74135 | Oil & Gas Operator | Jan 1998 |
| 59 | Ramco, Inc. | | Oil & Gas Operator | May 1992 |
| 60 | Ramrod Prod. Co., Inc. | | Oil Operator | Feb 2024 |
| 61 | Randy Wilson | | Oil Operator | Dec 2020 |
| 62 | Range Louisiana Operating, LLC | | Oil & Gas Operator | Aug 2020 |
| 63 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 64 | Ranger Holdings Co | | Oil & Gas Operator | Jul 1993 |
| 65 | Ranger Investments, Inc. | Longview, TX 75605 | Oil & Gas Operator | Oct 2006 |
| 66 | Ranger Oil Company | Canada, 00100 | Oil & Gas Operator | Sep 2001 |
| 67 | Ranger, Inc. | | Oil & Gas Operator | Dec 1986 |
| 68 | Ransom Horne,Jr. | | Oil & Gas Operator | Dec 1991 |
| 69 | Rapiere Resources Company | | Oil & Gas Operator | Aug 2024 |
| 70 | Raptor Resources, Inc. | Austin, TX 78701 | Oil & Gas Operator | Apr 2026 |
| 71 | Rauch, Shaw & Laird, Inc. | | Oil & Gas Operator | Mar 1995 |
| 72 | Rauch-Shaw Assoc. Inc. & Laird | | Oil & Gas Operator | Mar 1991 |
| 73 | Ray Conner | | Oil & Gas Operator | Apr 2002 |
| 74 | Ray Energy, LLC | | Oil Operator | Jan 2025 |
| 75 | Ray Estis | | Oil Operator | Dec 2024 |
| 76 | Ray Oil Company | Dallas, TX 75370 | Oil Operator | Dec 1989 |
| 77 | Raybo, Inc. | | Oil Operator | Dec 1990 |
| 78 | Rayford Exploration | | Oil Operator | Feb 1984 |
| 79 | Rayville Resources, Inc. | | Oil & Gas Operator | Aug 1991 |
| 80 | RBD-Shelby Agency | Dallas, TX 75283 | Oil & Gas Operator | Dec 1993 |
| 81 | Rbi, Inc. | | Oil Operator | Dec 1984 |
| 82 | RCV Investments, LLC | | Oil & Gas Operator | Jan 2025 |
| 83 | RDT Properties, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2012 |
| 84 | Reagan Exploration Company Inc | | Oil & Gas Operator | Nov 1998 |
| 85 | Realco Oil & Gas, Inc. | | Oil & Gas Operator | Sep 2007 |
| 86 | Reb Petroleum Company | Sugar Land, TX 77478 | Oil & Gas Operator | Apr 2026 |
| 87 | Rebel Drilling Co. Inc. | | Oil & Gas Operator | Oct 1995 |
| 88 | Rebel Enterprises, Inc. | | Oil Operator | Dec 1991 |
| 89 | Rebel Land And Exploration Inc | | Oil & Gas Operator | Aug 1989 |
| 90 | Rebel Oil Company | Keaton, KY 41226 | Oil & Gas Operator | Jan 2025 |
| 91 | Rebel Oil Of North Louisiana, LLC | | Oil & Gas Operator | Dec 2007 |
| 92 | Rebel Production Company | Kilgore, TX 75663 | Oil Operator | Apr 2026 |
| 93 | Recon Operating Inc | | Oil & Gas Operator | Jun 1991 |
| 94 | Red River Oil & Gas Inc. | | Oil & Gas Operator | May 2012 |
| 95 | Red Rock Energy Group Inc | | Oil & Gas Operator | Dec 2024 |
| 96 | Red Rock Production L.L.C. | | Oil Operator | Jan 2025 |
| 97 | Red Rooster Gas Corporation | | Gas Operator | Sep 1993 |
| 98 | Red Willow Offshore, LLC | | Oil & Gas Operator | Apr 2011 |
| 99 | Red Wing Oil & Gas, Inc. | | Oil Operator | Sep 1990 |
| 100 | Redd Production Of Mansfield | | Oil & Gas Operator | Jan 1991 |