| 1 | Aas Oil Co., Inc. | Arkansas City, KS 67005 | Oil & Gas Operator | Sep 2025 |
| 2 | Abercrombie A L | | Oil & Gas Operator | Nov 1995 |
| 3 | Abercrombie Energy, LLC | Wichita, KS 67212 | Oil & Gas Operator | Sep 2025 |
| 4 | Agv Corp. | Attica, KS 67009 | Oil & Gas Operator | Sep 2025 |
| 5 | Aladdin Petroleu | | Oil & Gas Operator | Nov 1995 |
| 6 | Allam Kevin T Oi | | Oil Operator | Jun 1988 |
| 7 | Allison Dean Oil | | Oil & Gas Operator | Nov 1994 |
| 8 | Allison J A | | Oil & Gas Operator | Nov 1995 |
| 9 | Amax Petroleum C | | Oil & Gas Operator | Aug 1986 |
| 10 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Nov 2025 |
| 11 | Anadarko Petrole | | Oil & Gas Operator | Dec 1996 |
| 12 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Dec 2025 |
| 13 | Anadarko Prod | | Oil & Gas Operator | Dec 1996 |
| 14 | Anadarko Production Co. | | Oil Operator | Feb 1989 |
| 15 | Anstine & Musgrove Inc | Ponca City, OK 74602 | Oil & Gas Operator | Nov 2025 |
| 16 | Apex Resources LLC | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 17 | Aquila Resources | Burkesville, KY 42717 | Oil & Gas Operator | Dec 2022 |
| 18 | Arrowhead Petrol | | Oil & Gas Operator | Feb 1992 |
| 19 | Ash, Wiley R., Jr. | Andover, KS 67002 | Oil & Gas Operator | Mar 1990 |
| 20 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 21 | Aztec Oil Operating LLC | El Dorado, KS 67042 | Oil & Gas Operator | Sep 2025 |
| 22 | B & W Oil Inc. | Wellington, KS 67152 | Oil Operator | Apr 2000 |
| 23 | B5 Operating, LLC | Wellington, KS 67152 | Oil & Gas Operator | Sep 2025 |
| 24 | Bach Oil Production | | Oil Operator | Sep 2025 |
| 25 | Banner Oil & Gas LLC | Oklahoma City, OK 73159 | Oil & Gas Operator | Nov 2025 |
| 26 | Barts Oilfield Servi | | Oil Operator | Sep 2025 |
| 27 | Bass Brothers En | | Oil & Gas Operator | Mar 1983 |
| 28 | Bates Oil | | Oil Operator | Feb 2020 |
| 29 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 30 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2026 |
| 31 | Bear Petroleum | | Oil & Gas Operator | Dec 1996 |
| 32 | Bear Petroleum LLC | Haysville, KS 67060 | Oil & Gas Operator | Sep 2025 |
| 33 | Beren Corporatio | | Oil & Gas Operator | Dec 1995 |
| 34 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 35 | Berexco Incorpor | | Oil & Gas Operator | Dec 1996 |
| 36 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 37 | Black Frank J | | Oil & Gas Operator | Jan 1994 |
| 38 | Bramble Oil Company | Wichita, KS 67206 | Oil & Gas Operator | Mar 2007 |
| 39 | Brandt Prod Comp | | Oil & Gas Operator | Sep 1994 |
| 40 | Brandt Production Company, Inc. | Wichita, KS 67230 | Oil Operator | Jan 2003 |
| 41 | Bruce Oil Compan | | Oil & Gas Operator | Dec 1996 |
| 42 | Bruce Oil Company, LLC | McPherson, KS 67460 | Oil Operator | Sep 2025 |
| 43 | Buccaneer Petrol | | Oil Operator | Jan 1988 |
| 44 | Buffalo Oil & Gas LLC | Oxford, KS 67119 | Oil & Gas Operator | Sep 2025 |
| 45 | Bullseye Petrole | | Oil Operator | Oct 1992 |
| 46 | Burch Exploration, Inc. | Parker, CO 80134 | Gas Operator | Apr 1996 |
| 47 | C D Operating Company Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 48 | Camio Enterprises, LLC | Augusta, KS 67010 | Oil Operator | Sep 2025 |
| 49 | Camio Oil Compan | | Oil & Gas Operator | Apr 1991 |
| 50 | Carr Exploration | | Oil & Gas Operator | Sep 1993 |
| 51 | Cec Operations LLC | Udall, KS 67146 | Oil & Gas Operator | Sep 2025 |
| 52 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Dec 2025 |
| 53 | Chase Exploratio | | Oil Operator | Sep 1992 |
| 54 | Chase Well Servi | | Oil Operator | Jun 1989 |
| 55 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2026 |
| 56 | Cheyenne Oil Services, Inc. | Ness City, KS 67560 | Oil Operator | Nov 2023 |
| 57 | Chieftain Oil Co Inc | Kiowa, KS 67070 | Oil & Gas Operator | Dec 2025 |
| 58 | Citation Oil & G | | Oil & Gas Operator | Dec 1996 |
| 59 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Feb 2026 |
| 60 | Clifford Resourc | | Oil & Gas Operator | Mar 1989 |
| 61 | CMX, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 62 | Continental Ener | | Oil & Gas Operator | Dec 1996 |
| 63 | Cooper Service Co. | | Oil & Gas Operator | Sep 2025 |
| 64 | Cooper, J. M. | Winfield, KS 67119 | Oil Operator | Oct 1997 |
| 65 | Craig-Stephfield | | Oil & Gas Operator | Jan 1994 |
| 66 | Crest Petr Inc | Rose Hill, KS 67133 | Oil Operator | Jun 2000 |
| 67 | Cullen Corporati | | Oil & Gas Operator | Jan 1993 |
| 68 | Cyclone Petroleu | | Oil & Gas Operator | Nov 1995 |
| 69 | Cyclone Petroleum, Incorporated | Jenks, OK 74037 | Oil & Gas Operator | Sep 2025 |
| 70 | D & A Oil Company | Abilene, TX 79606 | Oil & Gas Operator | Oct 2018 |
| 71 | D & A Oil Company, A General Partnership | Clearwater, KS 67026 | Oil Operator | Dec 2024 |
| 72 | D & M Oil, Inc. | Winfield, KS 67156 | Oil Operator | Apr 2001 |
| 73 | Dawson-Markwell | | Oil & Gas Operator | Nov 1996 |
| 74 | Dawson-Markwell Exploration Co. | Oklahoma City, OK 73101 | Oil & Gas Operator | Nov 2025 |
| 75 | Daystar Petroleum Inc | Eureka, KS 67045 | Oil & Gas Operator | Sep 2025 |
| 76 | Delhi Pipeline | | Oil & Gas Operator | Sep 1999 |
| 77 | Delta Petroleum Company | Houston, TX 77267 | Oil Operator | Aug 1996 |
| 78 | Delta Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
| 79 | Denmark Oil | Wichita, KS 67212 | Oil & Gas Operator | May 2000 |
| 80 | Destiny Petroleum LLC | The Woodlands, TX 77381 | Oil & Gas Operator | May 2024 |
| 81 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2026 |
| 82 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Dec 2025 |
| 83 | Docking Developm | | Oil & Gas Operator | Dec 1996 |
| 84 | Docking Development Company, LLC | Arkansas City, KS 67005 | Oil & Gas Operator | Oct 2013 |
| 85 | Doralex Energy I | | Oil & Gas Operator | Feb 1995 |
| 86 | Doralex Energy, Inc. | San Angelo, TX 76904 | Oil Operator | Feb 2000 |
| 87 | Double D Oil Co | Winfield, KS 67156 | Oil Operator | Sep 2025 |
| 88 | Drake Exploration LLC | Arkansas City, KS 67005 | Oil & Gas Operator | Nov 2025 |
| 89 | Dunne-Gardner Pe | | Oil & Gas Operator | Nov 1992 |
| 90 | Eagle Creek Corporation | Andover, KS 67002 | Oil & Gas Operator | Sep 2025 |
| 91 | Edinger Incorpor | | Oil Operator | Oct 1986 |
| 92 | Elk Energy Holdings LLC | Wichita, KS 67226 | Oil & Gas Operator | Sep 2025 |
| 93 | Elm III Operating Company LLC | Edmond, OK 73013 | Oil & Gas Operator | Sep 2025 |
| 94 | Encore Operating Company | Denver, CO 80227 | Oil & Gas Operator | Dec 2019 |
| 95 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Nov 2025 |
| 96 | Enmark Gas Gathering LP | Dallas, TX 75252 | Oil & Gas Operator | Sep 2025 |
| 97 | Eufaula Enterpri | | Oil & Gas Operator | Mar 1986 |
| 98 | Everly Company I | | Oil & Gas Operator | Sep 1981 |
| 99 | Evolution Oil & | | Oil & Gas Operator | Apr 1993 |
| 100 | Faith Petroleum, Inc. | Arkansas City, KS 67005 | Oil & Gas Operator | Sep 2025 |