| 3901 | Rabalais Oil And Gas, Inc. | | Oil & Gas Operator | Sep 2023 |
| 3902 | Rabb Contracting Company, L.L.C. | | Oil Operator | Nov 2024 |
| 3903 | Rabb Resources, Limited | | Oil Operator | Dec 2002 |
| 3904 | Rabun Resources | | Gas Operator | Jan 2025 |
| 3905 | Rabwin Oil & Gas, Inc. | | Oil & Gas Operator | Nov 1991 |
| 3906 | Radco Energy LLC | | Oil Operator | Jan 2025 |
| 3907 | Radiant Oil & Gas Operating Company, Inc | | Oil & Gas Operator | Aug 2015 |
| 3908 | Radke Oil Co., Inc. | | Oil Operator | May 2001 |
| 3909 | Radzewicz & Assoc-R.C.Bertolet | | Oil Operator | Oct 1985 |
| 3910 | Radzewicz Operating Corporation | | Oil & Gas Operator | Oct 2017 |
| 3911 | Ralph H Roach Petro LTD Three | | Oil & Gas Operator | May 1981 |
| 3912 | Ralph L. Leaderbrand | | Oil & Gas Operator | Dec 1996 |
| 3913 | Ram Energy LLC (Ok) | | Oil & Gas Operator | Feb 2018 |
| 3914 | Ram Management Company, Inc. | | Oil & Gas Operator | Sep 1984 |
| 3915 | Ram Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2012 |
| 3916 | Ramco Exploration, Inc. | | Oil & Gas Operator | Feb 1998 |
| 3917 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 3918 | Ramco Operating Company | Tulsa, OK 74135 | Oil & Gas Operator | Jan 1998 |
| 3919 | Ramco, Inc. | | Oil & Gas Operator | May 1992 |
| 3920 | Ramrod Prod. Co., Inc. | | Oil Operator | Feb 2024 |
| 3921 | Randy Wilson | | Oil Operator | Dec 2020 |
| 3922 | Range Louisiana Operating, LLC | | Oil & Gas Operator | Aug 2020 |
| 3923 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 3924 | Ranger Holdings Co | | Oil & Gas Operator | Jul 1993 |
| 3925 | Ranger Investments, Inc. | Longview, TX 75605 | Oil & Gas Operator | Oct 2006 |
| 3926 | Ranger Oil Company | Canada, 00100 | Oil & Gas Operator | Sep 2001 |
| 3927 | Ranger, Inc. | | Oil & Gas Operator | Dec 1986 |
| 3928 | Ransom Horne,Jr. | | Oil & Gas Operator | Dec 1991 |
| 3929 | Rapiere Resources Company | | Oil & Gas Operator | Aug 2024 |
| 3930 | Raptor Resources, Inc. | Austin, TX 78701 | Oil & Gas Operator | Feb 2026 |
| 3931 | Rauch, Shaw & Laird, Inc. | | Oil & Gas Operator | Mar 1995 |
| 3932 | Rauch-Shaw Assoc. Inc. & Laird | | Oil & Gas Operator | Mar 1991 |
| 3933 | Ray Conner | | Oil & Gas Operator | Apr 2002 |
| 3934 | Ray Energy, LLC | | Oil Operator | Jan 2025 |
| 3935 | Ray Estis | | Oil Operator | Dec 2024 |
| 3936 | Ray Oil Company | Dallas, TX 75370 | Oil Operator | Dec 1989 |
| 3937 | Raybo, Inc. | | Oil Operator | Dec 1990 |
| 3938 | Rayford Exploration | | Oil Operator | Feb 1984 |
| 3939 | Rayville Resources, Inc. | | Oil & Gas Operator | Aug 1991 |
| 3940 | RBD-Shelby Agency | Dallas, TX 75283 | Oil & Gas Operator | Dec 1993 |
| 3941 | Rbi, Inc. | | Oil Operator | Dec 1984 |
| 3942 | RCV Investments, LLC | | Oil & Gas Operator | Jan 2025 |
| 3943 | RDT Properties, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2012 |
| 3944 | Reagan Exploration Company Inc | | Oil & Gas Operator | Nov 1998 |
| 3945 | Realco Oil & Gas, Inc. | | Oil & Gas Operator | Sep 2007 |
| 3946 | Realitos Energy Corporation | | Oil & Gas Operator | Mar 1991 |
| 3947 | Reb Petroleum Company | Sugar Land, TX 77478 | Oil & Gas Operator | Feb 2026 |
| 3948 | Rebel Drilling Co. Inc. | | Oil & Gas Operator | Oct 1995 |
| 3949 | Rebel Enterprises, Inc. | | Oil Operator | Dec 1991 |
| 3950 | Rebel Land And Exploration Inc | | Oil & Gas Operator | Aug 1989 |
| 3951 | Rebel Oil Company | Keaton, KY 41226 | Oil & Gas Operator | Jan 2025 |
| 3952 | Rebel Oil Of North Louisiana, LLC | | Oil & Gas Operator | Dec 2007 |
| 3953 | Rebel Production Company | Kilgore, TX 75663 | Oil Operator | Feb 2026 |
| 3954 | Recon Operating Inc | | Oil & Gas Operator | Jun 1991 |
| 3955 | Red River Gas Company | | Oil & Gas Operator | May 2000 |
| 3956 | Red River Natural Gas Co. | | Oil & Gas Operator | Dec 1984 |
| 3957 | Red River Oil & Gas Inc. | | Oil & Gas Operator | May 2012 |
| 3958 | Red Rock Energy Group Inc | | Oil & Gas Operator | Dec 2024 |
| 3959 | Red Rock Production L.L.C. | | Oil Operator | Jan 2025 |
| 3960 | Red Rooster Gas Corporation | | Gas Operator | Sep 1993 |
| 3961 | Red Willow Offshore, LLC | | Oil & Gas Operator | Apr 2011 |
| 3962 | Red Wing Oil & Gas, Inc. | | Oil Operator | Sep 1990 |
| 3963 | Redd Production Of Mansfield | | Oil & Gas Operator | Jan 1991 |
| 3964 | Redman Operating Company | Houston, TX 77042 | Oil & Gas Operator | May 2008 |
| 3965 | Redmon Oil Company, Inc., The | Plano, TX 75023 | Oil & Gas Operator | Feb 2026 |
| 3966 | Reeder Production | | Oil Operator | Oct 2005 |
| 3967 | Reef Exploration Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2007 |
| 3968 | Reef Exploration, L.P. | Richardson, TX 75080 | Oil & Gas Operator | Feb 2026 |
| 3969 | Reese Energy Corp. | | Oil & Gas Operator | Oct 1991 |
| 3970 | Reese Oil & Gas LTD | | Oil & Gas Operator | Sep 1991 |
| 3971 | Reese Oil And Gas Company | | Oil & Gas Operator | Mar 1985 |
| 3972 | Refined Products, Inc. | Beaumont, TX 77705 | Oil Operator | Feb 2026 |
| 3973 | Regal Petroleum Services, Inc. | Euless, TX 76039-1127 | Oil & Gas Operator | May 2015 |
| 3974 | Regency Field Services LLC | Dallas, TX 75201 | Oil Operator | Jul 2017 |
| 3975 | Regency Gas Gathrng & Proc LLC | | Oil Operator | Sep 2007 |
| 3976 | Regency Intrastate Gas LLC | | Oil Operator | Feb 2009 |
| 3977 | Reita Oil Company | | Oil & Gas Operator | Jan 1987 |
| 3978 | Relco Exploration Co., Inc. | | Gas Operator | Aug 1987 |
| 3979 | Reliable Prod Service Inc. | | Oil Operator | Mar 2007 |
| 3980 | Reliance Energy, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 3981 | Reliance Petroleum Corporation | | Oil & Gas Operator | Oct 2018 |
| 3982 | Reliance TR-JV | | Gas Operator | Apr 1988 |
| 3983 | Reliance Trusts | Dallas, TX 75244 | Oil & Gas Operator | Nov 1995 |
| 3984 | Reliance Trusts HS | | Gas Operator | Feb 1989 |
| 3985 | Reliance Well Service, Inc. | | Oil & Gas Operator | Apr 1997 |
| 3986 | Reliant Energy Field SVS Inc. | | Oil Operator | Sep 2002 |
| 3987 | Relmm Corporation | | Oil & Gas Operator | May 1980 |
| 3988 | Relmm CSC/Imc | | Oil & Gas Operator | Apr 1977 |
| 3989 | Remuda Oil & Gas Corp. | | Oil & Gas Operator | Aug 1987 |
| 3990 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Feb 2026 |
| 3991 | Renaissance Offshore, LLC | | Oil & Gas Operator | Mar 2023 |
| 3992 | Renaissance Petroleum Co LLC | Houston, TX 77058 | Oil & Gas Operator | Nov 2011 |
| 3993 | Rental & Fishing Tools, Inc. | | Oil Operator | Dec 2024 |
| 3994 | Republic Energy Resources,Inc. | | Oil Operator | May 1991 |
| 3995 | Republic Gas Gathering Sys Inc | | Oil & Gas Operator | Nov 1981 |
| 3996 | Republic Mineral Corporation | | Oil & Gas Operator | Sep 1987 |
| 3997 | Republic Petroleum Corp. | | Oil & Gas Operator | Nov 1977 |
| 3998 | Republic Prod.Co.Of Tex., Inc | | Oil & Gas Operator | Jun 1981 |
| 3999 | Research Enterprises, Inc. | | Oil Operator | Jan 1996 |
| 4000 | Reserve Oil Inc. | | Oil & Gas Operator | Jan 1980 |