| 3501 | R & B Oil & Gas, Inc. | Attica, KS 67009 | Oil & Gas Operator | Mar 2025 |
| 3502 | R & D Call | Cedar Vale, KS 67024 | Oil Operator | Oct 2010 |
| 3503 | R & D Oil & Gas | Exeter, CA 93221-9697 | Oil & Gas Operator | Aug 2019 |
| 3504 | R & D Oil LLC | Oklahoma City, OK 73154 | Oil Operator | Dec 2005 |
| 3505 | R & E Oil Co., Inc. | Augusta, KS 67010 | Oil Operator | Dec 2009 |
| 3506 | R & M Oil Co. | Fredonia, KS 66736 | Oil & Gas Operator | Aug 2002 |
| 3507 | R & R Partners | | Oil Operator | Oct 2009 |
| 3508 | R & W Energies - | | Oil Operator | Sep 1995 |
| 3509 | R & W Energies LLC | Eureka, KS 67045 | Oil Operator | Mar 2025 |
| 3510 | R & W Energies-Agency Account | | Oil Operator | Jan 1996 |
| 3511 | R C Taylor Operating Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2025 |
| 3512 | R F Oil | | Oil & Gas Operator | Oct 1992 |
| 3513 | R J Enterprises | Farmington, NM 874990051 | Oil Operator | Mar 2021 |
| 3514 | R J Operating Company | Albany, TX 76430 | Oil & Gas Operator | Mar 2025 |
| 3515 | R&D Enterprises- | | Oil Operator | Dec 1988 |
| 3516 | R-Jann-N Oil | | Oil Operator | Dec 1999 |
| 3517 | R. B. Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Nov 1996 |
| 3518 | R. D. Energy, Inc. | Sedan, KS 67361 | Oil Operator | Mar 2025 |
| 3519 | R. D. Finnesy Oil | | Oil Operator | Nov 2019 |
| 3520 | R. J. Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Nov 2024 |
| 3521 | R. P. Nixon Operations, Inc | Hays, KS 67601 | Oil Operator | Mar 2025 |
| 3522 | R.C.Taylor Companies, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2019 |
| 3523 | R.E.French Oil Company, L.L.C. | Gridley, KS 66852 | Oil Operator | Nov 1999 |
| 3524 | R.H.S. Oil Company | | Oil Operator | Nov 2009 |
| 3525 | R.J. Patrick Operating Co. | | Oil & Gas Operator | Jun 2006 |
| 3526 | R.S. Glaze Drilling | | Oil Operator | Jan 1998 |
| 3527 | R.T. Enterprises Of Kansas, Inc. | Louisburg, KS 66053 | Oil Operator | Mar 2025 |
| 3528 | Rader Oil Compan | | Oil Operator | May 1987 |
| 3529 | Rader Oil Company | | Oil Operator | Mar 2025 |
| 3530 | Raelee Oil LLC | Plainville, KS 67663 | Oil Operator | Jul 2021 |
| 3531 | Raida, Junior V. | Neodesha, KS 66757 | Oil Operator | Jul 2013 |
| 3532 | Rains & Williams | | Oil & Gas Operator | Nov 1995 |
| 3533 | Rains And Williamson Oil Co. | Wichita, KS 67277 | Oil & Gas Operator | Mar 2025 |
| 3534 | Raker Resources LLC | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 3535 | Rakestraw Bros., L.L.C | El Dorado, KS 67042 | Oil & Gas Operator | Dec 2019 |
| 3536 | Ram Oil & Gas | Blackwell, OK 74631 | Oil & Gas Operator | May 2013 |
| 3537 | Ram Petroleum Co | | Oil & Gas Operator | Sep 1983 |
| 3538 | Ram Petroleum Corporation | Wichita, KS 67202 | Gas Operator | Mar 2025 |
| 3539 | Ram Service - Mi | | Oil Operator | Sep 1994 |
| 3540 | Rama Operating C | | Oil & Gas Operator | Dec 1996 |
| 3541 | Rama Operating Co., Inc. | Stafford, KS 67578 | Oil & Gas Operator | Apr 2025 |
| 3542 | Ramco Drilling S | | Oil & Gas Operator | Dec 1992 |
| 3543 | Ramco Energy Corporation | FT. Lauderdale, FL 33312 | Oil & Gas Operator | Dec 2008 |
| 3544 | Ramoil Company | Winfield, KS 67156 | Oil & Gas Operator | May 1987 |
| 3545 | Rampike Resources LTD | Denver, CO 80202 | Oil Operator | May 2025 |
| 3546 | Ramrod Oil Co., A General Partnership | Iola, KS 66749 | Oil Operator | Nov 2001 |
| 3547 | Ramshorn Resources, LLC | Wichita, KS 67202 | Oil & Gas Operator | Mar 2025 |
| 3548 | Randon Production Co. | Marion, KS 66861 | Oil & Gas Operator | Sep 2024 |
| 3549 | Randy J Walker Oil Company | | Oil Operator | Dec 2024 |
| 3550 | Raney Oil Company | Lawrence, KS 66047 | Oil & Gas Operator | May 1999 |
| 3551 | Raney Oil Company, LLC | Lawrence, KS 66049 | Oil & Gas Operator | Mar 2025 |
| 3552 | Range Oil Co., Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jan 2020 |
| 3553 | Range Oil Compan | | Oil & Gas Operator | Nov 1995 |
| 3554 | Ranger Oil & Gas, Inc. | Okay, OK 74446 | Oil Operator | Jan 2007 |
| 3555 | Ranken Energy Corporation | Edmond, OK 73013 | Oil & Gas Operator | Apr 2025 |
| 3556 | Rankin, Lennes | Sharon, KS 67138 | Gas Operator | Mar 2025 |
| 3557 | Rapid Well Servi | | Oil Operator | Feb 1995 |
| 3558 | Rapid Well Service, Inc. | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 3559 | Ratex Corporation | Cambridge, WI 53523 | Oil Operator | Jun 2011 |
| 3560 | Ratzlaff, Steven | Galva, KS 67443 | Oil Operator | Dec 1996 |
| 3561 | Raven Resources LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Apr 2025 |
| 3562 | Raw Energy Corporation Of Kansas | Weatherford, TX 76086 | Gas Operator | Dec 2019 |
| 3563 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2025 |
| 3564 | Raygary Oil Co. | Havana, KS 67347 | Oil Operator | May 2002 |
| 3565 | Raygary Oil Comp | | Oil Operator | Sep 1991 |
| 3566 | Raymond Oil Co I | | Gas Operator | Sep 1993 |
| 3567 | Raymond Oil Co., Inc. | Wichita, KS 67201 | Oil & Gas Operator | Mar 2025 |
| 3568 | Raymond Oil Comp | | Oil & Gas Operator | Dec 1996 |
| 3569 | Razook Oil Compa | | Oil Operator | Aug 1990 |
| 3570 | Razorback Explor | | Gas Operator | Dec 1992 |
| 3571 | RBM Oil LLC | Hillsboro, KS 67063 | Oil Operator | Mar 2025 |
| 3572 | RCR Drilling & P | | Oil & Gas Operator | Apr 1992 |
| 3573 | RCS Oil | | Oil Operator | Mar 2025 |
| 3574 | RDH Enterprises, Inc. | El Reno, OK 73036 | Oil & Gas Operator | May 2015 |
| 3575 | Reach Group-Reac | | Oil & Gas Operator | Apr 1995 |
| 3576 | Reach Petroleum | | Oil & Gas Operator | Jan 1994 |
| 3577 | Reach Petroleum Corporation | Wichita, KS 67218 | Oil & Gas Operator | Dec 2009 |
| 3578 | Reata Petroleum LLC | Independence, KS 67301 | Oil & Gas Operator | Mar 2025 |
| 3579 | Rebel Oil LLC | | Oil Operator | Mar 2025 |
| 3580 | Recovery Resourc | | Oil Operator | Dec 1986 |
| 3581 | Red Bear Drillin | | Oil & Gas Operator | Sep 1992 |
| 3582 | Red Buck Oil Co. | Copan, OK 74022-0215 | Oil Operator | Nov 2009 |
| 3583 | Red Cedar Oil, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Feb 2025 |
| 3584 | Red Cloud Exploration Operating LLC | Calabasas, CA 91302 | Oil Operator | Feb 2016 |
| 3585 | Red Hills Energy, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Mar 2025 |
| 3586 | Red Hills Resources, Inc. | Englewood, KS 67840 | Oil & Gas Operator | Mar 2025 |
| 3587 | Red Jack Oil LLC | | Oil Operator | May 2013 |
| 3588 | Red Mountain Oil LLC | Golden, CO 80402 | Oil Operator | Nov 1997 |
| 3589 | Red Oak Energy, Inc. | Wichita, KS 67207 | Oil & Gas Operator | Mar 2025 |
| 3590 | Red Point Oil | | Oil Operator | May 2019 |
| 3591 | Redboot Production, Inc | Stafford, KS 67578 | Gas Operator | Jan 2017 |
| 3592 | Redbud Oil & Gas Operating, LLC | Spring, TX 77379 | Oil & Gas Operator | Mar 2025 |
| 3593 | Reddig Enterprises Inc. | Gorham, KS 67640 | Oil Operator | Mar 2025 |
| 3594 | Redland Resources, LLC | Oklahoma City, OK 73127 | Oil & Gas Operator | May 2025 |
| 3595 | Redstone Oil & G | | Oil Operator | Sep 1989 |
| 3596 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 3597 | Redtail Investments LLC | Oklahoma City, OK 73179 | Oil & Gas Operator | May 2025 |
| 3598 | Reed Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Jun 2005 |
| 3599 | Reed Oil, LLC | Louisburg, KS 66053 | Oil Operator | Mar 2025 |
| 3600 | Reed, George A. | Wichita, KS 67202 | Oil & Gas Operator | Dec 2009 |