| 3601 | Reach Group-Reac | | Oil & Gas Operator | Apr 1995 |
| 3602 | Reach Petroleum | | Oil & Gas Operator | Jan 1994 |
| 3603 | Reach Petroleum Corporation | Wichita, KS 67218 | Oil & Gas Operator | Dec 2009 |
| 3604 | Reata Petroleum LLC | Independence, KS 67301 | Oil & Gas Operator | Jan 2025 |
| 3605 | Rebel Oil LLC | | Oil Operator | Jan 2025 |
| 3606 | Recovery Resourc | | Oil Operator | Dec 1986 |
| 3607 | Red Bear Drillin | | Oil & Gas Operator | Sep 1992 |
| 3608 | Red Buck Oil Co. | Copan, OK 74022-0215 | Oil Operator | Nov 2009 |
| 3609 | Red Cedar Oil, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Dec 2024 |
| 3610 | Red Cloud Exploration Operating LLC | Calabasas, CA 91302 | Oil Operator | Feb 2016 |
| 3611 | Red Hills Energy, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Jan 2025 |
| 3612 | Red Hills Resources, Inc. | Englewood, KS 67840 | Oil & Gas Operator | Jan 2025 |
| 3613 | Red Jack Oil LLC | | Oil Operator | May 2013 |
| 3614 | Red Mountain Oil LLC | Golden, CO 80402 | Oil Operator | Nov 1997 |
| 3615 | Red Oak Energy, Inc. | Wichita, KS 67207 | Oil & Gas Operator | Jan 2025 |
| 3616 | Red Point Oil | | Oil Operator | May 2019 |
| 3617 | Redboot Production, Inc | Stafford, KS 67578 | Gas Operator | Jan 2017 |
| 3618 | Redbud Oil & Gas Operating, LLC | Spring, TX 77379 | Oil & Gas Operator | Jan 2025 |
| 3619 | Reddig Enterprises Inc. | Gorham, KS 67640 | Oil Operator | Dec 2024 |
| 3620 | Redland Resources, LLC | Oklahoma City, OK 73127 | Oil & Gas Operator | Mar 2025 |
| 3621 | Redstone Oil & G | | Oil Operator | Sep 1989 |
| 3622 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 3623 | Redtail Investments LLC | Oklahoma City, OK 73179 | Oil & Gas Operator | Mar 2025 |
| 3624 | Redtail Resources, LLC | Shawnee, KS 66226 | Oil Operator | Dec 2024 |
| 3625 | Reed Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Jun 2005 |
| 3626 | Reed Oil, LLC | Louisburg, KS 66053 | Oil Operator | Jan 2025 |
| 3627 | Reed, George A. | Wichita, KS 67202 | Oil & Gas Operator | Dec 2009 |
| 3628 | Reef Exploration Corporation | Richardson, TX 75080 | Oil Operator | Sep 2019 |
| 3629 | Reef Operating, Inc. | Hays, KS 67601 | Oil Operator | Jan 2025 |
| 3630 | Reese Exploratio | | Oil & Gas Operator | Mar 1995 |
| 3631 | Reese Oil Company | Raytown, MO 64133 | Oil Operator | Jan 1999 |
| 3632 | Regency Field Services LLC | Dallas, TX 75201 | Oil Operator | Jul 2017 |
| 3633 | Regency Midcon Gas LLC | Dallas, TX 75201 | Oil Operator | Oct 2014 |
| 3634 | Reh Oil And Gas, LLC. | Pratt, KS 67124 | Oil & Gas Operator | Apr 2019 |
| 3635 | Reichlinger Business Services | | Oil Operator | Apr 2014 |
| 3636 | Reif Oil & Gas Company LLC | Hoisington, KS 67544 | Oil Operator | Aug 2010 |
| 3637 | Reif Oil Operati | | Oil Operator | Nov 1988 |
| 3638 | Reilly Oil Company, Inc. | Wakeeney, KS 67672 | Oil Operator | Jan 2025 |
| 3639 | Reilly Oil E & P | | Oil Operator | Jan 2025 |
| 3640 | Relative Energy, Inc. | Lindsborg, KS 67456 | Oil Operator | Nov 2019 |
| 3641 | Reliance Oil, LLC | Gridley, KS 66852 | Oil Operator | Dec 2024 |
| 3642 | Remco Ener Corpo | | Oil & Gas Operator | Dec 1994 |
| 3643 | Remco Energy Corporation | Independence, MO 64055 | Oil & Gas Operator | Nov 2009 |
| 3644 | Remington Financ | | Oil Operator | Oct 1994 |
| 3645 | Renegade Resources Corp. | Reno, NV 89511 | Oil & Gas Operator | Jul 2024 |
| 3646 | Renick Energy, L.C. | Cimarron, KS 67835 | Gas Operator | Apr 2016 |
| 3647 | Resource Oil And Gas, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2025 |
| 3648 | Resource Operations, Inc. | Tulsa, OK 74157 | Oil & Gas Operator | May 2016 |
| 3649 | Resource Venture | | Oil & Gas Operator | Oct 1991 |
| 3650 | Resources & Investment Co. | Mandeville, LA 70448 | Oil Operator | Oct 2023 |
| 3651 | Resources Invest | | Oil & Gas Operator | Jun 1985 |
| 3652 | Resources Investment Corp | Denver, CO 80202 | Oil & Gas Operator | Sep 2018 |
| 3653 | Ressler Well Service, Inc. | Burrton, KS 67020 | Oil & Gas Operator | Jan 2025 |
| 3654 | Reusch Well Service, Inc. | Ottawa, KS 66067 | Oil Operator | Jan 2025 |
| 3655 | Rexoco Incorpora | | Oil Operator | Apr 1992 |
| 3656 | Reynolds Oil Co. | | Oil Operator | Nov 2005 |
| 3657 | RFB Exploration | | Oil Operator | Feb 1981 |
| 3658 | RGN Company, Inc. | Stockton, KS 67669 | Oil Operator | Jan 2025 |
| 3659 | RH Capital-Beets, LLC | Jefferson City, MO 65101 | Oil Operator | Jan 2025 |
| 3660 | Rhea, Andrew | Galva, KS 67443 | Oil & Gas Operator | Nov 2024 |
| 3661 | Rheem Resources Inc | Wichita, KS 67220 | Oil Operator | Aug 1998 |
| 3662 | Rhoads, Mark | Seminole, OK 74868 | Oil Operator | Sep 1999 |
| 3663 | Rhodes Well Service | | Oil Operator | Jan 2025 |
| 3664 | Rice Engineering | | Oil & Gas Operator | Jul 1988 |
| 3665 | Rice Engineering Corporation | Great Bend, KS 67530 | Oil & Gas Operator | Feb 2023 |
| 3666 | Rice Oil Co | Hobbs, NM 88240 | Oil & Gas Operator | Dec 2020 |
| 3667 | Rice Production Company | | Oil Operator | Dec 2019 |
| 3668 | Richard Engineer | | Oil Operator | Mar 1991 |
| 3669 | Richard Oil Comp | | Oil Operator | Mar 1992 |
| 3670 | Richardson And Son , Inc. | Winfield, KS 67156 | Oil Operator | Jan 2025 |
| 3671 | Richardson Developments | | Oil Operator | Dec 2024 |
| 3672 | Richardson J Mar | | Oil & Gas Operator | Apr 1995 |
| 3673 | Richardson Oil | | Oil & Gas Operator | Dec 2019 |
| 3674 | Richardson Oil Operating | | Oil & Gas Operator | Dec 2009 |
| 3675 | Richey Heartsill | | Oil Operator | Feb 1991 |
| 3676 | Richlan Drilling | | Oil Operator | Dec 1994 |
| 3677 | Richlan Drilling, A General Partnership | Beaver, KS 67525 | Oil & Gas Operator | Jan 2025 |
| 3678 | Richland Oil Investments, LLC | Palco, KS 67657 | Oil Operator | Jan 2025 |
| 3679 | Rick'S Well Service | Cherryvale, KS 67335 | Oil & Gas Operator | Apr 2023 |
| 3680 | Rickerson, Russell | Rantoul, KS 66079 | Oil Operator | Dec 2024 |
| 3681 | Rider Oil & Gas | | Oil Operator | Aug 1991 |
| 3682 | Rider, Don C. | Medicine Lodge, KS 67104 | Gas Operator | Mar 2000 |
| 3683 | Rierson Energy, LLC | McPherson, KS 67460 | Oil & Gas Operator | Jan 2025 |
| 3684 | Rierson, Joe | McPherson, KS 67460 | Oil Operator | Jan 2025 |
| 3685 | Rig 6 Drilling Co., Inc. | Bronson, KS 66716 | Oil Operator | Oct 2019 |
| 3686 | Riley Resources, Inc . | Oklahoma City, OK 73162 | Gas Operator | Jan 2025 |
| 3687 | Rim Oil Company | Hays, KS 67601 | Oil Operator | Jun 2001 |
| 3688 | Rimco Oil & Gas | | Oil Operator | Mar 1987 |
| 3689 | Rincon Oil & Gas LLC | Arvada, CO 80005 | Gas Operator | Jun 2022 |
| 3690 | Rine Drilling Co | | Oil & Gas Operator | Mar 1994 |
| 3691 | Rine Drillingand Exploration, Inc. | Wichita, KS 67202 | Gas Operator | Dec 2009 |
| 3692 | Rine Exploration | | Oil & Gas Operator | Jul 1994 |
| 3693 | Rine Exploration Co. | | Oil Operator | Jul 1988 |
| 3694 | Ring Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 3695 | Ringneck Resources, LLC | Tulsa, OK 74135 | Gas Operator | Jan 2025 |
| 3696 | Rissman Lease Operating | Oklahoma City, OK 73116 | Oil Operator | Dec 1996 |
| 3697 | Ritchie C Stewar | | Oil Operator | Aug 1982 |
| 3698 | Ritchie Explorat | | Oil & Gas Operator | Dec 1996 |
| 3699 | Ritchie Exploration | | Oil Operator | Aug 1995 |
| 3700 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Feb 2025 |