| 1 | 3G Production, LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 2 | A & J Oil Compan | | Oil & Gas Operator | Dec 1994 |
| 3 | Abercrombie A L | | Oil & Gas Operator | Nov 1995 |
| 4 | Abercrombie Dril | | Oil Operator | Jan 1990 |
| 5 | Abercrombie Energy, LLC | Wichita, KS 67212 | Oil & Gas Operator | Sep 2025 |
| 6 | Ainsworth Operat | | Oil Operator | Apr 1995 |
| 7 | Ainsworth Operating Co. | Salem, OR 97302 | Oil Operator | Sep 2025 |
| 8 | Allen Drilling C | | Oil & Gas Operator | Nov 1994 |
| 9 | Allison Dean Oil | | Oil & Gas Operator | Nov 1994 |
| 10 | Allison J A | | Oil & Gas Operator | Nov 1995 |
| 11 | Allison Operating Co., L.C. | Wichita, KS 67202 | Oil & Gas Operator | Dec 1998 |
| 12 | Alpha Management | | Oil & Gas Operator | Jan 1994 |
| 13 | Alpine Drilling | | Oil & Gas Operator | May 1994 |
| 14 | Alpine Drilling Company, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2000 |
| 15 | American Energie | | Oil & Gas Operator | May 1995 |
| 16 | American Warrior | | Oil & Gas Operator | Sep 2025 |
| 17 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Nov 2025 |
| 18 | Anderson Energy Inc | Wichita, KS 67278 | Oil & Gas Operator | Sep 2025 |
| 19 | Anstine & Musgrove Inc | Ponca City, OK 74602 | Oil & Gas Operator | Nov 2025 |
| 20 | Anstine-Musgrove | Ponca City, OK 74602 | Oil & Gas Operator | Feb 2017 |
| 21 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 22 | Arcadian Resources LLC | Glen Elder, KS 67446 | Oil & Gas Operator | Feb 2026 |
| 23 | Arco Oil & Gas C | | Oil & Gas Operator | Dec 1992 |
| 24 | Ardc Inc. | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 25 | Argent Energy (Us) Holdings Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Sep 2021 |
| 26 | Argent Energy In | | Oil Operator | Feb 1994 |
| 27 | Argent Energy, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 28 | Arizona Oil Comp | | Oil Operator | Oct 1984 |
| 29 | Arrowhead Petrol | | Oil & Gas Operator | Feb 1992 |
| 30 | Ash Donald D Oil | | Oil & Gas Operator | Feb 1986 |
| 31 | Austin Robert L | Stafford, KS 67578 | Oil & Gas Operator | Dec 1999 |
| 32 | Aztec Oil Operating LLC | El Dorado, KS 67042 | Oil & Gas Operator | Sep 2025 |
| 33 | B & B Oil Company | Corsicana, TX 75110 | Oil & Gas Operator | Sep 2025 |
| 34 | Barfield Oil Cor | | Oil Operator | Oct 1995 |
| 35 | Barnett Winfred | | Oil & Gas Operator | Feb 1982 |
| 36 | Bear Petroleum | | Oil & Gas Operator | Dec 1996 |
| 37 | Bear Petroleum LLC | Haysville, KS 67060 | Oil & Gas Operator | Sep 2025 |
| 38 | Beaver Unit (The) | Great Bend, KS 67530 | Oil Operator | Jul 1989 |
| 39 | Becker Oil Corporation | Ponca City, OK 74602 | Oil & Gas Operator | Nov 2025 |
| 40 | Bee-Gee Exploration Co. | Wichita, KS 67202 | Gas Operator | Apr 2020 |
| 41 | Belport Oil Inc | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2025 |
| 42 | Benchmark Oil & | | Oil Operator | Dec 1996 |
| 43 | Benchmark Oil & Gas Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 44 | Beren Corporatio | | Oil & Gas Operator | Dec 1995 |
| 45 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 46 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Jan 2026 |
| 47 | Berexco Incorpor | | Oil & Gas Operator | Dec 1996 |
| 48 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 49 | Bergman Oil Co., L.C. | Wichita, KS 67202 | Oil Operator | Sep 2007 |
| 50 | Bergman Oil Comp | | Oil Operator | Mar 1995 |
| 51 | Big 'J' Prod Com | | Oil & Gas Operator | Aug 1992 |
| 52 | Big 'O' | | Oil Operator | Sep 2025 |
| 53 | Big Horn Oil Co Inc | Great Bend, KS 67530 | Oil & Gas Operator | May 2013 |
| 54 | Bird Dog Oil, LLC | Denver, CO 80202 | Oil Operator | Sep 2025 |
| 55 | Bison Energy Cor | | Oil & Gas Operator | Aug 1995 |
| 56 | Black Frank J | | Oil & Gas Operator | Jan 1994 |
| 57 | Black Rock Resources, LLC | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 58 | Blackhawk Energy | | Oil Operator | Dec 1993 |
| 59 | Bluebird Production, Inc. | Great Bend, KS 67530 | Oil Operator | Nov 2011 |
| 60 | Bob'S Hauling Service, Inc. | St John, KS 67576 | Oil Operator | Aug 2025 |
| 61 | Boger Brothers D | | Oil & Gas Operator | Nov 1992 |
| 62 | Bolding Grady Co | | Oil & Gas Operator | Nov 1995 |
| 63 | Bookstore, Michael D. | St. John, KS 67576 | Oil Operator | Aug 2025 |
| 64 | Boyer Jay C | | Oil Operator | Feb 1994 |
| 65 | Bramwell Petrole | | Oil & Gas Operator | Dec 1995 |
| 66 | Brooks Ron Corpo | | Oil & Gas Operator | Sep 1995 |
| 67 | Brougher Oil, Inc. | Wichita, KS 67212 | Oil & Gas Operator | Apr 2002 |
| 68 | C & B Operating Inc. | St John, KS 67576 | Oil & Gas Operator | Sep 2025 |
| 69 | C & J Pumping, Inc. | Sylvia, KS 67581 | Oil & Gas Operator | Dec 2009 |
| 70 | C & S Oil Company, LLC | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 71 | C & S Well Servi | | Oil & Gas Operator | Nov 1995 |
| 72 | C & S Well Servicing Co. | Lyons, KS 67554 | Oil & Gas Operator | Jul 2000 |
| 73 | C G Oil, Inc. | Victoria, KS 67671 | Oil Operator | Sep 2025 |
| 74 | C. H. Todd, Inc. | Wichita, KS 67212 | Oil & Gas Operator | Dec 2019 |
| 75 | Caerus Kansas LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 76 | Cambria Corporation | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2019 |
| 77 | Cardinal Energy | | Oil & Gas Operator | Dec 2008 |
| 78 | Carmen Schmitt, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Sep 2025 |
| 79 | Carr Exploration | | Oil & Gas Operator | Sep 1993 |
| 80 | Carrie Exploration & Development, LLC | Hays, KS 67601 | Oil & Gas Operator | Dec 2019 |
| 81 | Carroll, Jon M. | Great Bend, KS 67530 | Oil Operator | Dec 2001 |
| 82 | Case Oil & Gas I | | Oil & Gas Operator | Apr 1992 |
| 83 | Castelli Exploration Inc | Oklahoma City, OK 73162 | Oil & Gas Operator | Nov 2025 |
| 84 | Castle Resources, Inc. | Russell, KS 67665 | Oil & Gas Operator | Sep 2025 |
| 85 | Catt Drilling Co. | Holyrood, KS 67450 | Oil Operator | Aug 1989 |
| 86 | Central Energy C | | Oil & Gas Operator | Jun 1994 |
| 87 | Chapman Explorat | | Oil Operator | Feb 1988 |
| 88 | Charter Energy, Inc. | Great Bend, KS 67530 | Oil Operator | Sep 2025 |
| 89 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2026 |
| 90 | Chevron U S A In | | Oil & Gas Operator | Sep 2000 |
| 91 | Chew Bill Incorp | | Oil & Gas Operator | Mar 1994 |
| 92 | Chew, Bill, Inc. | Hutchinson, KS 67502 | Oil Operator | Sep 2002 |
| 93 | Cheyenne Explora | | Oil Operator | Jun 1983 |
| 94 | Cincris Energy C | | Oil & Gas Operator | Jun 1991 |
| 95 | Circle T Oil | | Oil Operator | Nov 2024 |
| 96 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Feb 2026 |
| 97 | CNG Producing | New Orleans, LA 70112-6000 | Oil & Gas Operator | Jun 2000 |
| 98 | Collins John B | | Oil Operator | Sep 1994 |
| 99 | Collins Oil, LLC | Ellinwood, KS 67526 | Oil Operator | Sep 2025 |
| 100 | Columbian Servic | | Oil & Gas Operator | Nov 1993 |