| 3801 | Rierson, Joe | McPherson, KS 67460 | Oil Operator | Sep 2025 |
| 3802 | Rig 6 Drilling Co., Inc. | Bronson, KS 66716 | Oil Operator | Oct 2019 |
| 3803 | Riley Resources, Inc . | Oklahoma City, OK 73162 | Gas Operator | Sep 2025 |
| 3804 | Rim Oil Company | Hays, KS 67601 | Oil Operator | Jun 2001 |
| 3805 | Rimco Oil & Gas | | Oil Operator | Mar 1987 |
| 3806 | Rincon Oil & Gas LLC | Arvada, CO 80005 | Gas Operator | Jun 2022 |
| 3807 | Rine Drilling Co | | Oil & Gas Operator | Mar 1994 |
| 3808 | Rine Drillingand Exploration, Inc. | Wichita, KS 67202 | Gas Operator | Dec 2009 |
| 3809 | Rine Exploration | | Oil & Gas Operator | Jul 1994 |
| 3810 | Rine Exploration Co. | | Oil Operator | Jul 1988 |
| 3811 | Ring Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 3812 | Ringneck Resources, LLC | Tulsa, OK 74135 | Gas Operator | Sep 2025 |
| 3813 | Rissman Lease Operating | Oklahoma City, OK 73116 | Oil Operator | Dec 1996 |
| 3814 | Ritchie C Stewar | | Oil Operator | Aug 1982 |
| 3815 | Ritchie Explorat | | Oil & Gas Operator | Dec 1996 |
| 3816 | Ritchie Exploration | | Oil Operator | Aug 1995 |
| 3817 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Sep 2025 |
| 3818 | Ritchie, A. Scott | Wichita, KS 67202 | Oil Operator | Mar 1988 |
| 3819 | River Gas Chanute, LLC | Savonburg, KS 66772 | Oil & Gas Operator | Dec 2009 |
| 3820 | River Road Production, LLC | Hays, KS 67601 | Oil Operator | Feb 1997 |
| 3821 | River Rock Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 3822 | Riveria Drilling | | Oil Operator | Aug 1984 |
| 3823 | Riverside Petrol | | Oil Operator | Sep 1995 |
| 3824 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 3825 | RJ Energy, LLC | Garnett, KS 66032 | Oil Operator | Sep 2025 |
| 3826 | RJM Company | Claflin, KS 67525 | Oil & Gas Operator | Sep 2025 |
| 3827 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Dec 2025 |
| 3828 | RL Investment, LLC | Hill City, KS 67642 | Oil Operator | Sep 2025 |
| 3829 | RLT Investment | Morland, KS 67650 | Oil Operator | Mar 2009 |
| 3830 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 3831 | RMR Drilling Com | | Oil Operator | Sep 1988 |
| 3832 | Roadrunner Energy | | Oil Operator | Sep 2005 |
| 3833 | Roadrunner Energy Inc | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2015 |
| 3834 | Roark S L | | Oil & Gas Operator | Nov 1992 |
| 3835 | Roark, Nancy | Winfield, KS 67156 | Oil Operator | Dec 2004 |
| 3836 | Robert Hopkins Operations, LLC | Salina, KS 67401 | Oil Operator | Nov 2019 |
| 3837 | Robert P. Wilson, Inc. | Montclair, NJ 07043 | Gas Operator | Dec 2019 |
| 3838 | Robert S. Harwell, Inc. | Edmond, OK 73034 | Oil Operator | Nov 2019 |
| 3839 | Robert-Gay Energ | | Oil & Gas Operator | Jun 1992 |
| 3840 | Robert-Gay Energy Enterprises | Hutchinson, KS 67501 | Oil Operator | Nov 1999 |
| 3841 | Roberta Hutton/Robert Hutton | Iola, KS 66749 | Oil Operator | Oct 2007 |
| 3842 | Roberts & Murphy | | Oil & Gas Operator | Sep 1995 |
| 3843 | Roberts & Murphy, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Apr 2016 |
| 3844 | Roberts Brothers | | Oil Operator | Oct 1993 |
| 3845 | Roberts Resources, Inc. | Wichita, KS 67275 | Oil & Gas Operator | Sep 2025 |
| 3846 | Roberts, Randy | Sedan, KS 67361 | Oil & Gas Operator | Sep 2025 |
| 3847 | Robertson, Richard | Tulsa, OK 74127 | Gas Operator | Sep 2025 |
| 3848 | Robinette Oil Company LLC | Chanute, KS 66720 | Oil Operator | Sep 2025 |
| 3849 | Robinowitz Oil C | | Oil Operator | Dec 1996 |
| 3850 | Robinowitz Oil Company, A General Partnership | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2023 |
| 3851 | Robinson Energy & Exploration, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Aug 2008 |
| 3852 | Robinson Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 3853 | Robinson Oil Com | | Oil & Gas Operator | Feb 1995 |
| 3854 | Robinson, Beryl A. | Peru, KS 67360 | Oil & Gas Operator | Mar 2012 |
| 3855 | Robison, L. E. Oil | Yates Center, KS 66783 | Oil Operator | Sep 2001 |
| 3856 | Robl-Six, Inc. | Ellinwood, KS 67526 | Oil Operator | Dec 2019 |
| 3857 | Robuck Petroleum, LLC | Nacogdoches, TX 75965 | Oil & Gas Operator | Feb 2026 |
| 3858 | Rock Creek Crude, LLC | Morrill, KS 66515 | Oil Operator | Sep 2025 |
| 3859 | Rock Creek Resources LLC | Englewood, CO 80112 | Oil & Gas Operator | Dec 2021 |
| 3860 | Rock Oil Company | Broken Arrow, OK 74014-6106 | Oil & Gas Operator | Nov 2025 |
| 3861 | Rock Oil Corporation | Lawrence, KS 66046 | Oil Operator | Oct 2004 |
| 3862 | Rock Petroleum, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 3863 | Rockhound Petroleum, LLC | St. John, KS 67576 | Oil & Gas Operator | Sep 2025 |
| 3864 | Rockin 'A' Oil | | Oil Operator | Jul 2025 |
| 3865 | Rockin 9 Oil And Gas, LLC | Auburndale, FL 33823 | Gas Operator | Sep 2025 |
| 3866 | Rockin Bar Nothin Ranch, Inc. | Independence, KS 67301 | Oil Operator | Sep 2025 |
| 3867 | Rockin G. Energy, LLC | Weatherford, TX 76087 | Gas Operator | Sep 2020 |
| 3868 | Rockin K Enterprises LLC | Riverside, MO 64168 | Oil Operator | Aug 2025 |
| 3869 | Rockwood Petrole | | Oil Operator | Aug 1985 |
| 3870 | Rocky Road Oil Company | | Oil Operator | May 2024 |
| 3871 | Rodeo Resources | | Oil Operator | Jul 1986 |
| 3872 | Rodgers, Murray | Sedan, KS 67361 | Oil Operator | Oct 1996 |
| 3873 | Rodriguez, Everado | Paola, KS 66071 | Oil Operator | Mar 2021 |
| 3874 | Roemer Oil Company | Denver, CO 80202 | Oil & Gas Operator | Nov 1998 |
| 3875 | Rogers Merlin D | | Oil Operator | Feb 2001 |
| 3876 | Rogers Oil Co. | Bronson, KS 66716 | Oil & Gas Operator | Sep 1995 |
| 3877 | Rogers Oil Compa | | Oil Operator | Apr 1993 |
| 3878 | Rolfe & Rolfe Oi | | Oil Operator | May 1988 |
| 3879 | Rolling Meadows Oil & Gas Development, LLC | Centerville, KS 66014 | Oil Operator | Sep 2025 |
| 3880 | Rome Oil, LLC | Lakewood, CO 80232 | Oil Operator | Aug 2025 |
| 3881 | Ron Brooks Corp | | Oil Operator | Sep 1995 |
| 3882 | Ron'S Oil Oper I | | Oil Operator | Nov 1994 |
| 3883 | Ron'S Oil Operations Inc | Penokee, KS 67659 | Oil Operator | Dec 2018 |
| 3884 | Ron-Bob Oil LLC | Neosho Falls, KS 66758 | Oil Operator | Sep 2025 |
| 3885 | Ronald Russ Prater, Inc. | Eastborough, KS 67207 | Gas Operator | Nov 2024 |
| 3886 | Ronco Incorporat | | Oil Operator | Sep 1988 |
| 3887 | Rookstool, William A. | Edmond, OK 73034 | Gas Operator | Jan 1999 |
| 3888 | Rosel Energy, Inc. | Liberal, KS 67901 | Oil & Gas Operator | Jul 2004 |
| 3889 | Rosewood Resources Inc | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 3890 | Rowden, John A. | Chanute, KS 66720 | Oil Operator | Oct 1998 |
| 3891 | Roxana Corporati | | Oil & Gas Operator | Feb 1993 |
| 3892 | Roxanna Pipeline, Inc. | Dallas, TX 75206 | Oil & Gas Operator | May 2010 |
| 3893 | Roy Farr Heirs | | Oil Operator | Jun 2013 |
| 3894 | Royal Drilling Inc | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 3895 | Royal Energy, Inc. | Dodge City, KS 67801 | Oil Operator | Dec 2019 |
| 3896 | Royal Petroleum | Baytown, TX 77521 | Oil & Gas Operator | Aug 2003 |
| 3897 | RSD Minerals LLC | Wichita, KS 67206 | Oil Operator | Aug 2025 |
| 3898 | Ruda Exploration Inc | Atwood, KS 67730 | Oil Operator | Sep 2025 |
| 3899 | Rude Crude | | Oil Operator | Sep 2025 |
| 3900 | Running Foxes Petroleum Inc. | Centennial, CO 80112 | Oil & Gas Operator | Sep 2025 |