| 1 | 3G Production, LLC | Pratt, KS 67124 | Oil & Gas Operator | Jun 2025 |
| 2 | A & A Discovery, Inc | Hill City, KS 67642 | Oil Operator | Aug 2002 |
| 3 | A P S, Inc. | Hays, KS 67601 | Oil Operator | Mar 2024 |
| 4 | Aaron Oil Operations LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 5 | Abercrombie A L | | Oil & Gas Operator | Nov 1995 |
| 6 | Abercrombie Energy, LLC | Wichita, KS 67212 | Oil & Gas Operator | Jun 2025 |
| 7 | Ace Oil Company | | Oil Operator | Jun 2025 |
| 8 | Addis Family Tru | | Oil Operator | Apr 1992 |
| 9 | Afg Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2009 |
| 10 | Albert R. Braun Oil Operations, LLC (Estate) | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 11 | Allen Drilling C | | Oil & Gas Operator | Nov 1994 |
| 12 | Alpine Drilling | | Oil & Gas Operator | May 1994 |
| 13 | American Energie | | Oil & Gas Operator | May 1995 |
| 14 | American Land And Energy LLC | Castle Pines, CO 80108 | Oil Operator | Jun 2025 |
| 15 | American Petrole | | Oil & Gas Operator | Dec 1996 |
| 16 | American Tank Service LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 17 | American Warrior | | Oil & Gas Operator | Jun 2025 |
| 18 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Jun 2025 |
| 19 | Amoco Production | | Oil & Gas Operator | Jun 2012 |
| 20 | Anchor Bay Petroleum | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 21 | Anchor Bay Petroleum LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 22 | Anderson Energy, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Apr 2025 |
| 23 | Anderson Thornto | | Oil & Gas Operator | Mar 1995 |
| 24 | Apache Drilling | | Oil Operator | Sep 1994 |
| 25 | Arcadian Resources LLC | Glen Elder, KS 67446 | Oil & Gas Operator | Oct 2025 |
| 26 | Ardc Inc. | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 27 | Argent Energy (Us) Holdings Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Sep 2021 |
| 28 | Argent Energy, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 29 | Arp Operating, LLC | Denver, CO 80202 | Oil Operator | Jun 2025 |
| 30 | Arrowhead Exploration, LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 31 | Ash-Bie Oil Co | Ellis, KS 67637 | Oil Operator | Nov 1998 |
| 32 | Austin, John F. | Baton Rouge, LA 70879 | Oil Operator | May 1992 |
| 33 | Aylward Drilling | | Oil & Gas Operator | Dec 1986 |
| 34 | B & J Developers | | Oil Operator | Oct 1995 |
| 35 | B J Oil Company | Corsicana, TX 75109 | Oil & Gas Operator | Oct 2025 |
| 36 | Bach Oil Production | | Oil Operator | Jun 2025 |
| 37 | Bankoff Oil Comp | | Oil Operator | Jun 1995 |
| 38 | Bankoff Oil Company | Tulsa, OK 74170 | Oil Operator | Sep 2003 |
| 39 | Barton Oil Compa | | Oil Operator | Jan 1986 |
| 40 | Baruch-Foster Co | | Oil Operator | Apr 1989 |
| 41 | Basgall Oil LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 42 | Bear Petroleum LLC | Haysville, KS 67060 | Oil & Gas Operator | Jun 2025 |
| 43 | Bell Brothers | | Oil Operator | Jun 2025 |
| 44 | Belport Oil, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Jun 2025 |
| 45 | Benchmark Energy LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2023 |
| 46 | Benchmark Oil & Gas Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 47 | Bennett & Schult | | Oil Operator | Jul 1995 |
| 48 | Bennett & Schulte Oil Co., A General Partnership | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 49 | Beren Corporatio | | Oil & Gas Operator | Dec 1995 |
| 50 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Oct 2025 |
| 51 | Berexco Incorpor | | Oil & Gas Operator | Dec 1996 |
| 52 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Oct 2025 |
| 53 | Big 'J' Prod Com | | Oil & Gas Operator | Aug 1992 |
| 54 | Big Bear Resourc | | Oil Operator | Jan 1989 |
| 55 | Big Horn Oil Co., Inc. | Great Bend, KS 67530 | Oil & Gas Operator | May 2013 |
| 56 | Big Ticket, LLC | Lawrence, KS 66047 | Oil Operator | Mar 2025 |
| 57 | Billips Trust - | | Oil Operator | Nov 1996 |
| 58 | Black Diamond Oi | | Oil Operator | Dec 1996 |
| 59 | Black Diamond Oil, Inc. | Hays, KS 67601 | Oil Operator | Apr 2019 |
| 60 | Black Rock Resources, LLC | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 61 | Blackhawk Production Company | | Oil Operator | Jun 2025 |
| 62 | Bolding Grady Co | | Oil & Gas Operator | Nov 1995 |
| 63 | Bow Creek Oil Company, General Partnership | Hays, KS 67601 | Oil & Gas Operator | Feb 2017 |
| 64 | Bowles, Jack | Edmond, OK 73083 | Oil Operator | Apr 2020 |
| 65 | Bowman Oil Compa | | Oil Operator | Feb 1994 |
| 66 | Bowman Oil Company, A General Partnership | Codell, KS 67663 | Oil Operator | Jun 2025 |
| 67 | Boxberger, Carl Oil, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2009 |
| 68 | Braden-Deem Inc | Wichita, KS 67226 | Oil & Gas Operator | Apr 2025 |
| 69 | Braden-Deem Inco | | Oil & Gas Operator | Nov 1994 |
| 70 | Braun, John | Victoria, KS 67671 | Oil Operator | Oct 2019 |
| 71 | Brock Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2019 |
| 72 | Brooks, Wanita M. | Moore, OK 73153 | Oil Operator | Jul 2003 |
| 73 | Brown, Thomas M. (Deceased) | Plainville, KS 67663 | Oil Operator | May 2006 |
| 74 | Brull, Allen | Victoria, KS 67671 | Oil Operator | Jun 2025 |
| 75 | Brungardt Oil And Leasing Inc. | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 76 | C & R Drilling C | | Oil Operator | Aug 1994 |
| 77 | C & S Oil Company, LLC | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 78 | C C & S Oil Oper | | Oil Operator | Apr 1983 |
| 79 | C G Oil, Inc. | Victoria, KS 67671 | Oil Operator | Jun 2025 |
| 80 | C K Oil Company | Great Bend, KS 67530 | Oil & Gas Operator | Jun 2025 |
| 81 | Caerus Kansas LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 82 | Canaday Oil Corp | Goddard, KS 67052 | Oil & Gas Operator | Jun 2025 |
| 83 | Carmen Schmitt, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jun 2025 |
| 84 | Castelli Exploration, Inc. | Oklahoma City, OK 73162 | Oil & Gas Operator | Jun 2025 |
| 85 | Castle Resources, Inc. | Russell, KS 67665 | Oil & Gas Operator | Jun 2025 |
| 86 | Cattlemans Oil O | | Oil Operator | Nov 1995 |
| 87 | Cattlemans Oil Operations | | Oil Operator | Dec 2009 |
| 88 | Cattlemans Oil Operations LLC | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 89 | Central Operating Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2025 |
| 90 | Challenger Exploration | | Oil Operator | Nov 2014 |
| 91 | Champion Petrole | | Oil Operator | Jan 1992 |
| 92 | Charter Energy, Inc. | Great Bend, KS 67530 | Oil Operator | Jun 2025 |
| 93 | Chesney Marilyn | | Oil Operator | Jul 1987 |
| 94 | Chevron U S A In | | Oil & Gas Operator | Sep 2000 |
| 95 | Chief Drilling C | | Oil & Gas Operator | Feb 1995 |
| 96 | Cholla Production LLC | Littleton, CO 80127 | Oil & Gas Operator | Jun 2025 |
| 97 | Christa Oil Comp | | Oil Operator | Nov 1994 |
| 98 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Oct 2025 |
| 99 | Cla-Mar Oil Company, LLC | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 100 | Clair Oil, Inc. | Russell, KS 67665 | Oil Operator | Nov 2019 |