| 1 | 21ST Century Oil Operations | Gorham, KS 67647 | Oil Operator | Dec 2001 |
| 2 | Abarta Oil & Gas Co., Inc. | Pittsburgh, PA 15238 | Oil & Gas Operator | Dec 2020 |
| 3 | Abercrombie Energy, LLC | Wichita, KS 67212 | Oil & Gas Operator | Dec 2025 |
| 4 | Ace Oil Company | | Oil Operator | Dec 2025 |
| 5 | Aleo Oil Company, LLC | Great Bend, KS 67530 | Oil Operator | Dec 2025 |
| 6 | Allen Drilling C | | Oil & Gas Operator | Nov 1994 |
| 7 | Allied Oil Compa | | Oil & Gas Operator | Feb 1995 |
| 8 | Allison Dean Oil | | Oil & Gas Operator | Nov 1994 |
| 9 | American Warrior | | Oil & Gas Operator | Dec 2025 |
| 10 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Jan 2026 |
| 11 | Anderson Energy Inc | Wichita, KS 67278 | Oil & Gas Operator | Dec 2025 |
| 12 | Anshutz Oil | | Oil Operator | Dec 2009 |
| 13 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Dec 2025 |
| 14 | Arrowhead Exploration, LLC | Hays, KS 67601 | Oil Operator | Dec 2025 |
| 15 | Arrowhead Petrol | | Oil & Gas Operator | Feb 1992 |
| 16 | Asher Associates Inc | Centennial, CO 80112 | Oil & Gas Operator | Aug 2016 |
| 17 | Barton Exploration, Inc. | Hays, KS 67601 | Oil & Gas Operator | Dec 2025 |
| 18 | Barton Oil Compa | | Oil Operator | Jan 1986 |
| 19 | Barton, Athol Oil , Inc. | Russell, KS 67665 | Oil Operator | Jul 2001 |
| 20 | Basgall Oil LLC | Hays, KS 67601 | Oil Operator | Dec 2025 |
| 21 | Bear Petroleum LLC | Haysville, KS 67060 | Oil & Gas Operator | Dec 2025 |
| 22 | Beck Resources Incorporated | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2026 |
| 23 | Becker, Lavern | Russell, KS 67665 | Oil Operator | Oct 1995 |
| 24 | Bennett & Schult | | Oil Operator | Jul 1995 |
| 25 | Bennett & Schulte Oil Co., A General Partnership | Russell, KS 67665 | Oil Operator | Dec 2025 |
| 26 | Bennett Oil Company, LLC | Russell, KS 67665 | Oil Operator | Dec 2025 |
| 27 | Beredco Incorpor | | Oil & Gas Operator | Dec 1993 |
| 28 | Berexco Incorpor | | Oil & Gas Operator | Dec 1996 |
| 29 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Apr 2026 |
| 30 | Bergman Oil Comp | | Oil Operator | Mar 1995 |
| 31 | Big 'O' | | Oil Operator | Dec 2025 |
| 32 | Black Dahlia Oil & Gas Co. | Glendale, CA 91208 | Oil Operator | Nov 2025 |
| 33 | Black Diamond Oil, Inc. | Hays, KS 67601 | Oil Operator | Apr 2019 |
| 34 | Black Petroleum | | Oil Operator | Sep 1989 |
| 35 | Black Rock Resources, LLC | Russell, KS 67665 | Oil Operator | Dec 2025 |
| 36 | Borell, Albert W. | Wilson, KS 67490 | Oil Operator | Jul 2005 |
| 37 | Borell, Elvern D. | Dighton, KS 67839 | Oil Operator | Dec 2009 |
| 38 | Boxberger Carl O | | Oil Operator | May 1994 |
| 39 | BP Exploration I | | Oil & Gas Operator | Oct 1994 |
| 40 | Bramble Oil Company | Wichita, KS 67206 | Oil & Gas Operator | Mar 2007 |
| 41 | Brougher Oil, Inc. | Wichita, KS 67212 | Oil & Gas Operator | Apr 2002 |
| 42 | Brown Tom Constr | | Oil Operator | Dec 1995 |
| 43 | Brungardt Oil And Leasing Inc. | Russell, KS 67665 | Oil Operator | Dec 2025 |
| 44 | Buffalo Resources LLC | Woodward, OK 73801 | Oil & Gas Operator | Aug 2025 |
| 45 | C C & S Oil Oper | | Oil Operator | Apr 1983 |
| 46 | C12 Kansas Oil, LLC | Denver, CO 80202 | Oil Operator | Dec 2009 |
| 47 | Carmen Schmitt, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2025 |
| 48 | Carrie Exploration & Development, LLC | Hays, KS 67601 | Oil & Gas Operator | Dec 2019 |
| 49 | Carroll, Jon M. | Great Bend, KS 67530 | Oil Operator | Dec 2001 |
| 50 | Castle Resources, Inc. | Russell, KS 67665 | Oil & Gas Operator | Dec 2025 |
| 51 | Chevron U S A In | | Oil & Gas Operator | Sep 2000 |
| 52 | Citation Oil & G | | Oil & Gas Operator | Dec 1996 |
| 53 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Apr 2026 |
| 54 | Claussen Roy A & | | Oil Operator | Jun 1986 |
| 55 | Clover Oil Company | | Oil Operator | Dec 2025 |
| 56 | CMX, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 57 | Coastal Oil & Ga | | Oil & Gas Operator | Oct 1996 |
| 58 | Col-Kan Developm | | Oil & Gas Operator | Jan 1995 |
| 59 | Col-Kan Development, Inc. | Russell, KS 67665 | Oil Operator | Jul 2005 |
| 60 | Connell, Mark Allen | Claflin, KS 67525 | Oil Operator | Dec 2025 |
| 61 | Conrade Patsy | | Oil Operator | Jan 1986 |
| 62 | Continental Ener | | Oil & Gas Operator | Dec 1996 |
| 63 | Corie Oil Co., Inc. | Russell, KS 67665 | Oil Operator | Feb 2003 |
| 64 | Corie Oil Compan | | Oil Operator | Jul 1985 |
| 65 | Craig Oil Company | | Oil Operator | Dec 2019 |
| 66 | Creco Operating LLC | | Oil & Gas Operator | Nov 2015 |
| 67 | Crude Producers | | Oil & Gas Operator | Sep 1988 |
| 68 | Curt'S Oil Operation, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Dec 2025 |
| 69 | CWB Oil Company, LLC | St. Francis, KS 67756 | Oil Operator | Dec 2025 |
| 70 | Damar Resources, Inc. | Hays, KS 67601 | Oil & Gas Operator | Aug 2025 |
| 71 | Davies & Company Inc | Tulsa, OK 74114 | Oil & Gas Operator | Nov 2000 |
| 72 | Daystar Petroleum Inc | Eureka, KS 67045 | Oil & Gas Operator | Dec 2025 |
| 73 | Decker Lease Ope | | Oil Operator | Dec 1988 |
| 74 | Denis Roberts Oil | | Oil Operator | Nov 2025 |
| 75 | Derrick-Amer Oil | | Oil Operator | Dec 1991 |
| 76 | Deutsch Oil Company | | Oil & Gas Operator | Dec 2025 |
| 77 | Dexxon Inc | Kiefer, OK 74041 | Oil & Gas Operator | Feb 2026 |
| 78 | Don Karst Well Service, Inc. | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 79 | Doonan & Sons In | | Oil Operator | Apr 1995 |
| 80 | Doonan And Sons, Inc. | Great Bend, KS 67530 | Oil Operator | Apr 2021 |
| 81 | Double Eagle Exploration Inc | Windthorst, TX 76389 | Oil Operator | Dec 2025 |
| 82 | Dreiling Oil Inc | Hays, KS 67601 | Oil Operator | Jun 2018 |
| 83 | Driftwood Oil Co. | Russell, KS 67665 | Oil Operator | Jan 1988 |
| 84 | Driscoll Jerry J | | Oil Operator | Apr 1994 |
| 85 | Driscoll Lease O | | Oil Operator | Jul 1988 |
| 86 | Driscoll Lease Operations, Inc. | Russell, KS 67665 | Oil Operator | Dec 1998 |
| 87 | Driscoll, Jerry J Oil Investment Inc | Russell, KS 67665 | Oil Operator | Dec 2025 |
| 88 | Eagle Petroleum | | Oil & Gas Operator | Nov 1995 |
| 89 | Eagle Petroleum, Inc. | Ellinwood, KS 67526 | Oil Operator | Dec 2025 |
| 90 | Eagle River Energy Corporation | Broken Arrow, OK 74011 | Oil & Gas Operator | Jan 2026 |
| 91 | Earco Oil Operations, Inc. | McPherson, KS 67460 | Oil Operator | Mar 1999 |
| 92 | Elevate Energy LTD | Aurora, CO 80016 | Oil & Gas Operator | Dec 2025 |
| 93 | Elmer L. Karst Oil, A General Partnership | Russell, KS 67665 | Oil Operator | Dec 2025 |
| 94 | Empire Energy E & P, LLC | Mayville, NY 14757 | Oil & Gas Operator | Mar 2019 |
| 95 | Energy Reserves Group, Inc. | Wichita, KS 67202 | Oil & Gas Operator | May 2002 |
| 96 | Equinox Oil Company Inc | Plainville, KS 67663 | Oil & Gas Operator | Dec 2019 |
| 97 | Ernst & Steinle | | Oil Operator | Oct 1991 |
| 98 | Esp Development, Inc. | Salina, KS 67401 | Oil Operator | Dec 2025 |
| 99 | Evans John Roy | | Oil Operator | Nov 1992 |
| 100 | F & M Oil Compan | | Oil & Gas Operator | Feb 1993 |