| 3701 | Rig 6 Drilling Co., Inc. | Bronson, KS 66716 | Oil Operator | Oct 2019 |
| 3702 | Riley Resources, Inc . | Oklahoma City, OK 73162 | Gas Operator | Jun 2025 |
| 3703 | Rim Oil Company | Hays, KS 67601 | Oil Operator | Jun 2001 |
| 3704 | Rimco Oil & Gas | | Oil Operator | Mar 1987 |
| 3705 | Rincon Oil & Gas LLC | Arvada, CO 80005 | Gas Operator | Jun 2022 |
| 3706 | Rine Drilling Co | | Oil & Gas Operator | Mar 1994 |
| 3707 | Rine Drillingand Exploration, Inc. | Wichita, KS 67202 | Gas Operator | Dec 2009 |
| 3708 | Rine Exploration | | Oil & Gas Operator | Jul 1994 |
| 3709 | Rine Exploration Co. | | Oil Operator | Jul 1988 |
| 3710 | Ring Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 3711 | Ringneck Resources, LLC | Tulsa, OK 74135 | Gas Operator | Jun 2025 |
| 3712 | Rissman Lease Operating | Oklahoma City, OK 73116 | Oil Operator | Dec 1996 |
| 3713 | Ritchie C Stewar | | Oil Operator | Aug 1982 |
| 3714 | Ritchie Explorat | | Oil & Gas Operator | Dec 1996 |
| 3715 | Ritchie Exploration | | Oil Operator | Aug 1995 |
| 3716 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |
| 3717 | Ritchie, A. Scott | Wichita, KS 67202 | Oil Operator | Mar 1988 |
| 3718 | River Road Production, LLC | Hays, KS 67601 | Oil Operator | Feb 1997 |
| 3719 | River Rock Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 3720 | Riveria Drilling | | Oil Operator | Aug 1984 |
| 3721 | Riverside Petrol | | Oil Operator | Sep 1995 |
| 3722 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 3723 | RJ Energy, LLC | Garnett, KS 66032 | Oil Operator | Jun 2025 |
| 3724 | RJM Company | Claflin, KS 67525 | Oil & Gas Operator | Jun 2025 |
| 3725 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Sep 2025 |
| 3726 | RL Investment, LLC | Hill City, KS 67642 | Oil Operator | Jun 2025 |
| 3727 | RLT Investment | Morland, KS 67650 | Oil Operator | Mar 2009 |
| 3728 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 3729 | RMR Drilling Com | | Oil Operator | Sep 1988 |
| 3730 | Roadrunner Energy | | Oil Operator | Sep 2005 |
| 3731 | Roadrunner Energy Inc | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2015 |
| 3732 | Roark S L | | Oil & Gas Operator | Nov 1992 |
| 3733 | Roark, Nancy | Winfield, KS 67156 | Oil Operator | Dec 2004 |
| 3734 | Robert Hopkins Operations, LLC | Salina, KS 67401 | Oil Operator | Nov 2019 |
| 3735 | Robert P. Wilson, Inc. | Montclair, NJ 07043 | Gas Operator | Dec 2019 |
| 3736 | Robert S. Harwell, Inc. | Edmond, OK 73034 | Oil Operator | Nov 2019 |
| 3737 | Robert-Gay Energ | | Oil & Gas Operator | Jun 1992 |
| 3738 | Robert-Gay Energy Enterprises | Hutchinson, KS 67501 | Oil Operator | Nov 1999 |
| 3739 | Roberta Hutton/Robert Hutton | Iola, KS 66749 | Oil Operator | Oct 2007 |
| 3740 | Roberts & Murphy | | Oil & Gas Operator | Sep 1995 |
| 3741 | Roberts & Murphy, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Apr 2016 |
| 3742 | Roberts Brothers | | Oil Operator | Oct 1993 |
| 3743 | Roberts Resources, Inc. | Wichita, KS 67275 | Oil & Gas Operator | Jun 2025 |
| 3744 | Roberts, Randy | Sedan, KS 67361 | Oil & Gas Operator | Jun 2025 |
| 3745 | Robertson, Richard | Tulsa, OK 74127 | Gas Operator | Jun 2025 |
| 3746 | Robinette Oil Company LLC | Chanute, KS 66720 | Oil Operator | Jun 2025 |
| 3747 | Robinowitz Oil C | | Oil Operator | Dec 1996 |
| 3748 | Robinowitz Oil Company, A General Partnership | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2023 |
| 3749 | Robinson Energy & Exploration, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Aug 2008 |
| 3750 | Robinson Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 3751 | Robinson Oil Com | | Oil & Gas Operator | Feb 1995 |
| 3752 | Robinson, Beryl A. | Peru, KS 67360 | Oil & Gas Operator | Mar 2012 |
| 3753 | Robison, L. E. Oil | Yates Center, KS 66783 | Oil Operator | Sep 2001 |
| 3754 | Robl-Six, Inc. | Ellinwood, KS 67526 | Oil Operator | Dec 2019 |
| 3755 | Robuck Petroleum, LLC | Nacogdoches, TX 75965 | Oil & Gas Operator | Dec 2025 |
| 3756 | Rock Creek Crude, LLC | Morrill, KS 66515 | Oil Operator | Jun 2025 |
| 3757 | Rock Creek Resources LLC | Englewood, CO 80112 | Oil & Gas Operator | Dec 2021 |
| 3758 | Rock Oil Company | Broken Arrow, OK 74014-6106 | Oil & Gas Operator | Aug 2025 |
| 3759 | Rock Oil Corporation | Lawrence, KS 66046 | Oil Operator | Oct 2004 |
| 3760 | Rock Petroleum, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2024 |
| 3761 | Rockhound Petroleum, LLC | St. John, KS 67576 | Oil & Gas Operator | Jun 2025 |
| 3762 | Rockin 'A' Oil | | Oil Operator | May 2025 |
| 3763 | Rockin 9 Oil And Gas, LLC | Auburndale, FL 33823 | Gas Operator | Jun 2025 |
| 3764 | Rockin Bar Nothin Ranch, Inc. | Independence, KS 67301 | Oil Operator | Jun 2025 |
| 3765 | Rockin G. Energy, LLC | Weatherford, TX 76087 | Gas Operator | Sep 2020 |
| 3766 | Rockin K Enterprises LLC | Riverside, MO 64168 | Oil Operator | May 2025 |
| 3767 | Rockwall Energy LLC | Colony, KS 66015 | Oil Operator | May 2025 |
| 3768 | Rockwood Petrole | | Oil Operator | Aug 1985 |
| 3769 | Rocky Road Oil Company | | Oil Operator | May 2024 |
| 3770 | Rodeo Resources | | Oil Operator | Jul 1986 |
| 3771 | Rodgers, Murray | Sedan, KS 67361 | Oil Operator | Oct 1996 |
| 3772 | Rodriguez, Everado | Paola, KS 66071 | Oil Operator | Mar 2021 |
| 3773 | Roemer Oil Company | Denver, CO 80202 | Oil & Gas Operator | Nov 1998 |
| 3774 | Rogers Merlin D | | Oil Operator | Feb 2001 |
| 3775 | Rogers Oil Co. | Bronson, KS 66716 | Oil & Gas Operator | Sep 1995 |
| 3776 | Rogers Oil Compa | | Oil Operator | Apr 1993 |
| 3777 | Rolfe & Rolfe Oi | | Oil Operator | May 1988 |
| 3778 | Rolling Meadows Oil & Gas Development, LLC | Centerville, KS 66014 | Oil Operator | Jun 2025 |
| 3779 | Rome Oil, LLC | Lakewood, CO 80232 | Oil Operator | Jun 2025 |
| 3780 | Ron Brooks Corp | | Oil Operator | Sep 1995 |
| 3781 | Ron'S Oil Oper I | | Oil Operator | Nov 1994 |
| 3782 | Ron'S Oil Operations Inc | Penokee, KS 67659 | Oil Operator | Dec 2018 |
| 3783 | Ron-Bob Oil LLC | Neosho Falls, KS 66758 | Oil Operator | Jun 2025 |
| 3784 | Ronald Russ Prater, Inc. | Eastborough, KS 67207 | Gas Operator | Nov 2024 |
| 3785 | Ronco Incorporat | | Oil Operator | Sep 1988 |
| 3786 | Rookstool, William A. | Edmond, OK 73034 | Gas Operator | Jan 1999 |
| 3787 | Rosel Energy, Inc. | Liberal, KS 67901 | Oil & Gas Operator | Jul 2004 |
| 3788 | Rosewood Resources Inc | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 3789 | Rowden, John A. | Chanute, KS 66720 | Oil Operator | Oct 1998 |
| 3790 | Roxana Corporati | | Oil & Gas Operator | Feb 1993 |
| 3791 | Roxanna Pipeline, Inc. | Dallas, TX 75206 | Oil & Gas Operator | May 2010 |
| 3792 | Roy Farr Heirs | | Oil Operator | Jun 2013 |
| 3793 | Royal Drilling Inc | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 3794 | Royal Energy, Inc. | Dodge City, KS 67801 | Oil Operator | Dec 2019 |
| 3795 | Royal Petroleum | Baytown, TX 77521 | Oil & Gas Operator | Aug 2003 |
| 3796 | RSD Minerals LLC | Wichita, KS 67206 | Oil Operator | Jun 2025 |
| 3797 | Ruda Exploration Inc | Atwood, KS 67730 | Oil Operator | Jun 2025 |
| 3798 | Rude Crude | | Oil Operator | Jun 2025 |
| 3799 | Running Foxes Petroleum Inc. | Centennial, CO 80112 | Oil & Gas Operator | Jun 2025 |
| 3800 | Rupe Oil Company Inc | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |