| 3501 | Rhoads, Mark | Seminole, OK 74868 | Oil Operator | Sep 1999 |
| 3502 | Rhodes Well Service | | Oil Operator | Dec 2023 |
| 3503 | Rice Engineering | | Oil & Gas Operator | Jul 1988 |
| 3504 | Rice Engineering Corporation | Great Bend, KS 67530 | Oil & Gas Operator | Feb 2023 |
| 3505 | Rice Oil Co | Hobbs, NM 88240 | Oil & Gas Operator | Dec 2020 |
| 3506 | Rice Production Company | | Oil Operator | Dec 2019 |
| 3507 | Richard Engineer | | Oil Operator | Mar 1991 |
| 3508 | Richard Oil Comp | | Oil Operator | Mar 1992 |
| 3509 | Richardson And Son , Inc. | Winfield, KS 67156 | Oil Operator | Dec 2023 |
| 3510 | Richardson Developments | | Oil Operator | Sep 2023 |
| 3511 | Richardson J Mar | | Oil & Gas Operator | Apr 1995 |
| 3512 | Richardson Oil | | Oil & Gas Operator | Dec 2019 |
| 3513 | Richardson Oil Operating | | Oil & Gas Operator | Dec 2009 |
| 3514 | Richey Heartsill | | Oil Operator | Feb 1991 |
| 3515 | Richlan Drilling | | Oil Operator | Dec 1994 |
| 3516 | Richlan Drilling, A General Partnership | Beaver, KS 67525 | Oil & Gas Operator | Dec 2023 |
| 3517 | Richland Oil Investments, LLC | Palco, KS 67657 | Oil Operator | Dec 2023 |
| 3518 | Rick'S Well Service | Cherryvale, KS 67335 | Oil & Gas Operator | Apr 2023 |
| 3519 | Rickerson, Russell | Rantoul, KS 66079 | Oil Operator | Dec 2023 |
| 3520 | Rider Oil & Gas | | Oil Operator | Aug 1991 |
| 3521 | Rider, Don C. | Medicine Lodge, KS 67104 | Gas Operator | Mar 2000 |
| 3522 | Rierson Energy, LLC | McPherson, KS 67460 | Oil & Gas Operator | Dec 2023 |
| 3523 | Rierson, Joe | McPherson, KS 67460 | Oil Operator | Dec 2023 |
| 3524 | Rig 6 Drilling Co., Inc. | Bronson, KS 66716 | Oil Operator | Oct 2019 |
| 3525 | Riley Resources, Inc . | Oklahoma City, OK 73162 | Gas Operator | Aug 2023 |
| 3526 | Rim Oil Company | Hays, KS 67601 | Oil Operator | Jun 2001 |
| 3527 | Rimco Oil & Gas | | Oil Operator | Mar 1987 |
| 3528 | Rincon Oil & Gas LLC | Arvada, CO 80005 | Gas Operator | Jun 2022 |
| 3529 | Rine Drilling Co | | Oil & Gas Operator | Mar 1994 |
| 3530 | Rine Drillingand Exploration, Inc. | Wichita, KS 67202 | Gas Operator | Dec 2009 |
| 3531 | Rine Exploration | | Oil & Gas Operator | Jul 1994 |
| 3532 | Rine Exploration Co. | | Oil Operator | Jul 1988 |
| 3533 | Ring Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 3534 | Ringneck Resources, LLC | Tulsa, OK 74135 | Gas Operator | Dec 2023 |
| 3535 | Rissman Lease Operating | Oklahoma City, OK 73116 | Oil Operator | Dec 1996 |
| 3536 | Ritchie C Stewar | | Oil Operator | Aug 1982 |
| 3537 | Ritchie Explorat | | Oil & Gas Operator | Dec 1996 |
| 3538 | Ritchie Exploration | | Oil Operator | Aug 1995 |
| 3539 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jan 2024 |
| 3540 | Ritchie, A. Scott | Wichita, KS 67202 | Oil Operator | Mar 1988 |
| 3541 | River Bend Oil Company, Inc. | Crane, TX 79731 | Oil Operator | Jun 2013 |
| 3542 | River Road Production, LLC | Hays, KS 67601 | Oil Operator | Feb 1997 |
| 3543 | River Rock Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2023 |
| 3544 | Riveria Drilling | | Oil Operator | Aug 1984 |
| 3545 | Riverside Petrol | | Oil Operator | Sep 1995 |
| 3546 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 3547 | RJ Energy, LLC | Garnett, KS 66032 | Oil Operator | Dec 2023 |
| 3548 | RJM Company | Claflin, KS 67525 | Oil & Gas Operator | Dec 2023 |
| 3549 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Feb 2024 |
| 3550 | RL Investment, LLC | Hill City, KS 67642 | Oil Operator | Dec 2023 |
| 3551 | RLT Investment | Morland, KS 67650 | Oil Operator | Mar 2009 |
| 3552 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 3553 | RMR Drilling Com | | Oil Operator | Sep 1988 |
| 3554 | Roadrunner Energy | | Oil Operator | Sep 2005 |
| 3555 | Roadrunner Energy, Inc. | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2015 |
| 3556 | Roark S L | | Oil & Gas Operator | Nov 1992 |
| 3557 | Roark, Nancy | Winfield, KS 67156 | Oil Operator | Dec 2004 |
| 3558 | Robert Hopkins Operations, LLC | Salina, KS 67401 | Oil Operator | Oct 2023 |
| 3559 | Robert P. Wilson, Inc. | Montclair, NJ 07043 | Gas Operator | Dec 2019 |
| 3560 | Robert S. Harwell, Inc. | Edmond, OK 73034 | Oil Operator | Jun 2023 |
| 3561 | Robert-Gay Energ | | Oil & Gas Operator | Jun 1992 |
| 3562 | Robert-Gay Energy Enterprises | Hutchinson, KS 67501 | Oil Operator | Nov 1999 |
| 3563 | Roberta Hutton/Robert Hutton | Iola, KS 66749 | Oil Operator | Oct 2007 |
| 3564 | Roberts & Murphy | | Oil & Gas Operator | Sep 1995 |
| 3565 | Roberts & Murphy, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Apr 2016 |
| 3566 | Roberts Brothers | | Oil Operator | Oct 1993 |
| 3567 | Roberts Resources, Inc. | Wichita, KS 67275 | Oil & Gas Operator | Dec 2023 |
| 3568 | Roberts, Randy | Sedan, KS 67361 | Oil & Gas Operator | Dec 2023 |
| 3569 | Robertson, Richard | Tulsa, OK 74127 | Gas Operator | Dec 2023 |
| 3570 | Robinette Oil Company LLC | Chanute, KS 66720 | Oil Operator | Dec 2023 |
| 3571 | Robinowitz Oil C | | Oil Operator | Dec 1996 |
| 3572 | Robinowitz Oil Company, A General Partnership | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2023 |
| 3573 | Robinson Energy & Exploration, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Aug 2008 |
| 3574 | Robinson Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 3575 | Robinson Oil Com | | Oil & Gas Operator | Feb 1995 |
| 3576 | Robinson, Beryl A. | Peru, KS 67360 | Oil & Gas Operator | Mar 2012 |
| 3577 | Robison, L. E. Oil | Yates Center, KS 66783 | Oil Operator | Sep 2001 |
| 3578 | Robl-Six, Inc. | Ellinwood, KS 67526 | Oil Operator | Dec 2019 |
| 3579 | Robuck Petroleum, LLC | Nacogdoches, TX 75965 | Oil & Gas Operator | Apr 2024 |
| 3580 | Rock Creek Crude, LLC | Morrill, KS 66515 | Oil Operator | Dec 2023 |
| 3581 | Rock Creek Resources LLC | Englewood, CO 80112 | Oil & Gas Operator | Dec 2021 |
| 3582 | Rock Oil Company | Broken Arrow, OK 74014-6106 | Oil & Gas Operator | Dec 2023 |
| 3583 | Rock Oil Corporation | Lawrence, KS 66046 | Oil Operator | Oct 2004 |
| 3584 | Rock Petroleum, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2023 |
| 3585 | Rockhound Petroleum, LLC | St. John, KS 67576 | Oil Operator | Dec 2023 |
| 3586 | Rockin 'A' Oil | | Oil Operator | Dec 2023 |
| 3587 | Rockin Bar Nothin Ranch, Inc. | Independence, KS 67301 | Oil Operator | Dec 2023 |
| 3588 | Rockin G. Energy, LLC | Weatherford, TX 76087 | Gas Operator | Sep 2020 |
| 3589 | Rockin K Enterprises LLC | Riverside, MO 64168 | Oil Operator | Dec 2023 |
| 3590 | Rockwood Petrole | | Oil Operator | Aug 1985 |
| 3591 | Rocky Road Oil Company | | Oil Operator | Aug 2023 |
| 3592 | Rodeo Resources | | Oil Operator | Jul 1986 |
| 3593 | Rodgers, Murray | Sedan, KS 67361 | Oil Operator | Oct 1996 |
| 3594 | Rodriguez, Everado | Paola, KS 66071 | Oil Operator | Mar 2021 |
| 3595 | Roemer Oil Company | Denver, CO 80202 | Oil & Gas Operator | Nov 1998 |
| 3596 | Rogers Merlin D | | Oil Operator | Feb 2001 |
| 3597 | Rogers Oil Co. | Bronson, KS 66716 | Oil & Gas Operator | Sep 1995 |
| 3598 | Rogers Oil Compa | | Oil Operator | Apr 1993 |
| 3599 | Rolfe & Rolfe Oi | | Oil Operator | May 1988 |
| 3600 | Rolling Meadows Oil & Gas Development, LLC | Centerville, KS 66014 | Oil Operator | Dec 2023 |