| 1 | 14start Energy LLC | | Oil & Gas Operator | Sep 2025 |
| 2 | 3G Production, LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 3 | 4-D Petroleum Consultants,LLC | Preston, KS 67583 | Oil & Gas Operator | Feb 2013 |
| 4 | A & J Oil Compan | | Oil & Gas Operator | Dec 1994 |
| 5 | Abercrombie A L | | Oil & Gas Operator | Nov 1995 |
| 6 | Abercrombie A L Inc | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 7 | Abercrombie Dril | | Oil Operator | Jan 1990 |
| 8 | Abercrombie Energy, LLC | Wichita, KS 67212 | Oil & Gas Operator | Sep 2025 |
| 9 | Agv Corp. | Attica, KS 67009 | Oil & Gas Operator | Sep 2025 |
| 10 | Aladdin Petroleu | | Oil & Gas Operator | Nov 1995 |
| 11 | Ambrotra Energy LLC | Medicine Lodge, KS 67104 | Oil Operator | Aug 2025 |
| 12 | Amcon Resources | Oklahoma City, OK 73102 | Gas Operator | Jul 2000 |
| 13 | American Energie | | Oil & Gas Operator | May 1995 |
| 14 | American Petrole | | Oil & Gas Operator | Dec 1996 |
| 15 | American Warrior | | Oil & Gas Operator | Sep 2025 |
| 16 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Nov 2025 |
| 17 | Anderson Energy Inc | Wichita, KS 67278 | Oil & Gas Operator | Sep 2025 |
| 18 | Andover Oil Comp | | Oil & Gas Operator | Oct 1989 |
| 19 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 20 | Argent Energy (Us) Holdings Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Sep 2021 |
| 21 | Arp Operating, LLC | Denver, CO 80202 | Oil Operator | Sep 2025 |
| 22 | Associated Petro | | Oil & Gas Operator | Aug 1994 |
| 23 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 24 | Attica Gas Ventu | | Oil & Gas Operator | Dec 1995 |
| 25 | Avalanche Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Feb 2026 |
| 26 | Avanti Petroleum, Inc. | Wichita, KS 67233 | Gas Operator | Dec 2007 |
| 27 | Aylward Drilling | | Oil & Gas Operator | Dec 1986 |
| 28 | Baber Oil Company LLC | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2025 |
| 29 | Bangert H E | | Gas Operator | Apr 1996 |
| 30 | Barfield Oil Cor | | Oil Operator | Oct 1995 |
| 31 | Barr Energy LLC | | Oil Operator | Jun 2010 |
| 32 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2026 |
| 33 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Dec 2025 |
| 34 | Bear Petroleum | | Oil & Gas Operator | Dec 1996 |
| 35 | Bear Petroleum Inc | Haysville, KS 67060-0438 | Oil & Gas Operator | Mar 2015 |
| 36 | Bear Petroleum LLC | Haysville, KS 67060 | Oil & Gas Operator | Sep 2025 |
| 37 | Bemco, LLC | Medicine Lodge, KS 67104 | Oil Operator | Aug 2025 |
| 38 | Benchmark Oil & Gas Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 39 | Bentley Oil & Gas Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 40 | Beren Corporatio | | Oil & Gas Operator | Dec 1995 |
| 41 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 42 | Berexco Incorpor | | Oil & Gas Operator | Dec 1996 |
| 43 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 44 | Bieberle Oil & Gas Inc. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Sep 2025 |
| 45 | Billy Cundiff Gas Company | | Gas Operator | Jul 2000 |
| 46 | Bison Energy Cor | | Oil & Gas Operator | Aug 1995 |
| 47 | Black Dome Energ | | Oil & Gas Operator | Dec 1996 |
| 48 | Black Frank J | | Oil & Gas Operator | Jan 1994 |
| 49 | Black Sheep Oil & Gas LLC | Odessa, TX 79768 | Oil & Gas Operator | Feb 2026 |
| 50 | Blessed Operating LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Sep 2025 |
| 51 | Blueridge Petroleum Corporation | Edmond, OK 73003 | Oil & Gas Operator | Sep 2025 |
| 52 | Bluff Creek Ridge, Inc. | Anthony, KS 67003 | Oil & Gas Operator | Sep 2025 |
| 53 | Boswell Energy C | | Oil & Gas Operator | Jun 1994 |
| 54 | Bowen Oil & Expl | | Oil & Gas Operator | Apr 1993 |
| 55 | Bowers Drilling | | Oil & Gas Operator | Jul 1995 |
| 56 | Bowers Drilling Co., Inc. | Wichita, KS 67211 | Oil & Gas Operator | Sep 2003 |
| 57 | Braden Oil Compa | | Gas Operator | Jul 1992 |
| 58 | Braden-Deem Inc | Wichita, KS 67226 | Oil & Gas Operator | Oct 2025 |
| 59 | Braden-Deem Inco | | Oil & Gas Operator | Nov 1994 |
| 60 | Bramble Oil Company | Wichita, KS 67206 | Oil & Gas Operator | Mar 2007 |
| 61 | Bramwell Petrole | | Oil & Gas Operator | Dec 1995 |
| 62 | Briscoe Petroleum, LLC | Sheridan, WY 82801 | Oil & Gas Operator | Jan 2026 |
| 63 | Bristol Resource | | Oil & Gas Operator | Jan 1995 |
| 64 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 65 | C & D Supply | Cherokee, OK 73728-5817 | Oil & Gas Operator | Nov 2025 |
| 66 | C K Oil Company | Great Bend, KS 67530 | Oil & Gas Operator | Sep 2025 |
| 67 | C M X Incorporat | | Oil & Gas Operator | Dec 1996 |
| 68 | C. H. Todd, Inc. | Wichita, KS 67212 | Oil & Gas Operator | Dec 2019 |
| 69 | Caerus Kansas LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 70 | Campbell Energy LLC | Carmi, IL 62821 | Oil Operator | Jul 2025 |
| 71 | Canaday Oil Corp | Goddard, KS 67052 | Oil & Gas Operator | Sep 2025 |
| 72 | Cara Ventures In | | Oil Operator | May 1995 |
| 73 | Carageannis, Paul C | Attica, KS 67009 | Oil Operator | Feb 2001 |
| 74 | Chapman Energy O | | Oil & Gas Operator | Jun 1993 |
| 75 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2026 |
| 76 | Chevron U S A In | | Oil & Gas Operator | Sep 2000 |
| 77 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Feb 2026 |
| 78 | Chief Drilling C | | Oil & Gas Operator | Feb 1995 |
| 79 | Chief Drilling, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Sep 1997 |
| 80 | Chieftain Oil Co Inc | Kiowa, KS 67070 | Oil & Gas Operator | Dec 2025 |
| 81 | Chisum Oil & Gas, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Sep 2025 |
| 82 | Circle K Enterprises | | Oil & Gas Operator | Aug 2023 |
| 83 | Citation Oil & G | | Oil & Gas Operator | Dec 1996 |
| 84 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Feb 2026 |
| 85 | Clark Exploratio | | Oil & Gas Operator | Jun 1991 |
| 86 | Clark Exploration Company | Highlands Ranch, CO 80126-7645 | Oil & Gas Operator | Nov 2024 |
| 87 | Clarke Corporati | Medicine Lodge, KS 67104 | Oil & Gas Operator | Sep 2025 |
| 88 | Clayton Corp Petro & NTRL Gas Prodn | Lakewood, CO 80228 | Oil & Gas Operator | Dec 2009 |
| 89 | Clayton Corporat | | Oil & Gas Operator | Jun 1994 |
| 90 | Cleary Petroleum Corporation | Edmond, OK 73083 | Oil & Gas Operator | Jul 2019 |
| 91 | CMX, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 92 | Coats Energy, Inc. | Wichita, KS 67201 | Oil & Gas Operator | Sep 2025 |
| 93 | Columbian Services Corporation | Topeka, KS 66603 | Gas Operator | Dec 2009 |
| 94 | Commercial Energ | | Gas Operator | Oct 1996 |
| 95 | Conner, Eugene | Bartlesville, OK 74005 | Oil & Gas Operator | Jul 2020 |
| 96 | Continental Ener | | Oil & Gas Operator | Dec 1996 |
| 97 | Continental Energy | Garden City, KS 67846-0918 | Oil & Gas Operator | Jul 2017 |
| 98 | Cunningham, Melvin | Medicine Lodge, KS 67104 | Oil Operator | Jan 2013 |
| 99 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 100 | Damson Oil Corpo | | Oil & Gas Operator | May 1994 |