| 1 | Aas Oil Co., Inc. | Arkansas City, KS 67005 | Oil & Gas Operator | Feb 2026 |
| 2 | Abderhalden, R. R. | Wichita, KS 67202 | Oil & Gas Operator | Dec 2019 |
| 3 | Abercrombie A L | | Oil & Gas Operator | Nov 1995 |
| 4 | Aladdin Petroleu | | Oil & Gas Operator | Nov 1995 |
| 5 | Alexander Howard | Tulsa, OK 74114 | Oil & Gas Operator | Feb 1996 |
| 6 | Altex Resources, Inc. (A Texas Corp.) | FT. Worth, TX 76107 | Oil Operator | Apr 1997 |
| 7 | Alton Oil LLC | Winfield, KS 67156 | Oil & Gas Operator | Feb 2026 |
| 8 | Anstine & Musgrove Inc | Ponca City, OK 74602 | Oil & Gas Operator | Mar 2026 |
| 9 | Anstine Oil Company | | Oil Operator | Feb 2026 |
| 10 | Anstine-Musgrove | Ponca City, OK 74602 | Oil & Gas Operator | Feb 2017 |
| 11 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Feb 2026 |
| 12 | Arbuckle Energy Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 13 | Ardc Inc. | Hays, KS 67601 | Oil Operator | Feb 2026 |
| 14 | Argali Resources | Dallas, TX 75206 | Oil & Gas Operator | Apr 2003 |
| 15 | Argas Incorporat | | Oil & Gas Operator | Aug 1995 |
| 16 | Arroyo Petroleum | Wichita, KS 67205 | Oil Operator | Mar 2001 |
| 17 | Ashley Jim Company (The) | Broken Arrow, OK 74012 | Oil Operator | Jan 2026 |
| 18 | Aylward Drilling | | Oil & Gas Operator | Dec 1986 |
| 19 | B & J Developers | | Oil Operator | Oct 1995 |
| 20 | B-C Steel, LLC | Yates Center, KS 66783 | Oil & Gas Operator | Nov 2015 |
| 21 | Backa LLC | Arkansas City, KS 67005 | Oil Operator | Feb 2026 |
| 22 | Bair, Orville L. | Burden, KS 67019 | Oil & Gas Operator | Oct 2003 |
| 23 | Bear Petroleum | | Oil & Gas Operator | Dec 1996 |
| 24 | Bear Petroleum LLC | Haysville, KS 67060 | Oil & Gas Operator | Feb 2026 |
| 25 | Becker Oil Corpo | | Oil & Gas Operator | Dec 1996 |
| 26 | Becker Oil Corporation | Ponca City, OK 74602 | Oil & Gas Operator | Feb 2026 |
| 27 | Becker, Clyde M. | Ponca City, OK 74601 | Oil & Gas Operator | Oct 2009 |
| 28 | Belport Oil Inc | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2026 |
| 29 | Benson Mineral G | | Oil & Gas Operator | Dec 1995 |
| 30 | Berentz Drilling Co., Inc. | Wichita, KS 67278 | Oil Operator | Feb 2026 |
| 31 | BJ Oil | Burlington, KS 66839 | Oil Operator | Mar 2012 |
| 32 | Blair H H Oil Co | | Oil Operator | Feb 1988 |
| 33 | Bluestem, Inc | Cedar Vale, KS 67024 | Oil Operator | Dec 2014 |
| 34 | Boley Investment | | Oil Operator | Aug 1995 |
| 35 | Boley Investments, Inc. | Wichita, KS 67212 | Oil Operator | Jun 1998 |
| 36 | Braden Petroleum | | Oil Operator | Oct 1988 |
| 37 | Braden Petroleum Company | Augusta, KS 67010 | Oil Operator | Apr 2008 |
| 38 | Bradley & Bradley Oil, A General Partnership | Dexter, KS 67038 | Oil Operator | Sep 2009 |
| 39 | Brake Inc. | | Oil & Gas Operator | Sep 2017 |
| 40 | Bruce Oil Compan | | Oil & Gas Operator | Dec 1996 |
| 41 | Bruce Oil Company, LLC | McPherson, KS 67460 | Oil Operator | Feb 2026 |
| 42 | Buccaneer Petrol | | Oil Operator | Jan 1988 |
| 43 | Buffalo Oil & Gas LLC | Oxford, KS 67119 | Oil & Gas Operator | Feb 2026 |
| 44 | C & C Oil | | Oil & Gas Operator | Jan 2004 |
| 45 | C & E Oil, LLC | Grenola, KS 67346 | Oil Operator | Nov 2021 |
| 46 | C R A C O Incorp | | Oil Operator | May 1988 |
| 47 | C-V Oil Company | Memphis, TN 38103 | Oil Operator | Jun 1998 |
| 48 | Camio Oil Co. | | Oil Operator | Dec 2004 |
| 49 | Camio Oil Compan | | Oil & Gas Operator | Apr 1991 |
| 50 | Carr Exploration | | Oil & Gas Operator | Sep 1993 |
| 51 | Catt Drilling Co. | Holyrood, KS 67450 | Oil Operator | Aug 1989 |
| 52 | Cec Operations LLC | Udall, KS 67146 | Oil & Gas Operator | Feb 2026 |
| 53 | Circle E Oil - E | | Oil Operator | May 1990 |
| 54 | Clapp Oil LLC | | Oil Operator | Feb 2026 |
| 55 | Clyde Petroleum | | Oil & Gas Operator | Dec 1988 |
| 56 | Collier Oil Prop | | Oil Operator | Apr 1987 |
| 57 | Colonial Corporation | St Simons Island, GA 31522 | Oil & Gas Operator | Dec 2000 |
| 58 | Condor Energy, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Nov 2019 |
| 59 | Continental Ener | | Oil & Gas Operator | Dec 1996 |
| 60 | Cooper Oil Company | Andover, KS 67002 | Oil Operator | Oct 1997 |
| 61 | Cooper Service Co. | | Oil & Gas Operator | Sep 2025 |
| 62 | Cottonwood Oil C | | Oil & Gas Operator | Oct 1988 |
| 63 | Cowley Energy Associates, LLC | Plano, TX 75093 | Gas Operator | Dec 2009 |
| 64 | Craig-Stephfield | | Oil & Gas Operator | Jan 1994 |
| 65 | Craig/Stephfield Oil & Gas, Inc. | Ponca City, OK 74602 | Oil & Gas Operator | Apr 2001 |
| 66 | Creco Operating LLC | | Oil & Gas Operator | Nov 2015 |
| 67 | Crest Petr Inc | Rose Hill, KS 67133 | Oil Operator | Jun 2000 |
| 68 | Crest Petroleum | Newark, OH 43055 | Oil & Gas Operator | Nov 1993 |
| 69 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Mar 2026 |
| 70 | Cudd Operating Corp | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2020 |
| 71 | Cullen Corporati | | Oil & Gas Operator | Jan 1993 |
| 72 | Cyclone Petroleum, Incorporated | Jenks, OK 74037 | Oil & Gas Operator | Jan 2026 |
| 73 | D & B Gas Co. | Burden, KS 67019 | Gas Operator | Feb 2001 |
| 74 | Dakota Drilling, LLC | Wichita, KS 67205 | Oil Operator | Feb 2006 |
| 75 | Darrah Oil Company, LLC | Wichita, KS 67201 | Oil & Gas Operator | Jun 2026 |
| 76 | Dawson-Markwell | | Oil & Gas Operator | Nov 1996 |
| 77 | Dawson-Markwell Exploration Co. | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2026 |
| 78 | Daystar Petroleum Inc | Eureka, KS 67045 | Oil & Gas Operator | Feb 2026 |
| 79 | Deck Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2020 |
| 80 | Denmark Oil | Wichita, KS 67212 | Oil & Gas Operator | May 2000 |
| 81 | Diamond Dixie Ex | | Oil Operator | Jul 1985 |
| 82 | Docking Developm | | Oil & Gas Operator | Dec 1996 |
| 83 | Docking Development Company, LLC | Arkansas City, KS 67005 | Oil & Gas Operator | Oct 2013 |
| 84 | Doodlebug Oil Co | | Oil Operator | Jun 2006 |
| 85 | Double D Oil Co | Winfield, KS 67156 | Oil Operator | Feb 2026 |
| 86 | Drake Exploration LLC | Arkansas City, KS 67005 | Oil & Gas Operator | Mar 2026 |
| 87 | Du Pont Oil Comp | | Oil Operator | May 1984 |
| 88 | Dunbar & Son Oil | | Oil & Gas Operator | Oct 1988 |
| 89 | Dunne Equities I | | Oil & Gas Operator | Dec 1995 |
| 90 | Eastern Petroleu | | Oil & Gas Operator | Oct 1993 |
| 91 | Elm III Operating Company LLC | Edmond, OK 73013 | Oil & Gas Operator | Feb 2026 |
| 92 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 93 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 94 | Excalibur Production Company, Inc. | McPherson, KS 67460 | Oil & Gas Operator | Feb 2026 |
| 95 | Faith Petroleum, Inc. | Arkansas City, KS 67005 | Oil & Gas Operator | Feb 2026 |
| 96 | Falcon Explorati | | Oil & Gas Operator | Apr 1995 |
| 97 | Flatlander Energy LLC | Blackwell, OK 74631 | Oil & Gas Operator | Feb 2026 |
| 98 | Gen-Dor Oil Co. | | Oil & Gas Operator | Nov 2009 |
| 99 | Gen-Dor Oil Comp | | Oil & Gas Operator | Nov 1994 |
| 100 | Geo-Sax Petroleum | | Oil & Gas Operator | Feb 2026 |