| 1 | 3G Production, LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 2 | Abercrombie Energy, LLC | Wichita, KS 67212 | Oil & Gas Operator | Sep 2025 |
| 3 | Advantage Resour | | Oil & Gas Operator | May 1994 |
| 4 | Advantage Resources Inc | Broomfield, CO 80020 | Oil & Gas Operator | Sep 2025 |
| 5 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Dec 2025 |
| 6 | American Warrior | | Oil & Gas Operator | Sep 2025 |
| 7 | Amoco Production | | Oil & Gas Operator | Jun 2012 |
| 8 | Anadarko Petrole | | Oil & Gas Operator | Dec 1996 |
| 9 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Nov 2025 |
| 10 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 11 | Aylward Drilling | | Oil & Gas Operator | Dec 1986 |
| 12 | Banks Oil - Lee | | Oil & Gas Operator | Jun 1995 |
| 13 | Banks Oil Co | | Oil & Gas Operator | Sep 2025 |
| 14 | Barnett Oil Co | | Oil & Gas Operator | Dec 2009 |
| 15 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Dec 2025 |
| 16 | Bear Petroleum LLC | Haysville, KS 67060 | Oil & Gas Operator | Sep 2025 |
| 17 | Benchmark Energy LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2023 |
| 18 | Benson Mineral G | | Oil & Gas Operator | Dec 1995 |
| 19 | Benson Mineral Group, Inc. | Denver, CO 80202 | Oil & Gas Operator | Apr 2022 |
| 20 | Beren Corporatio | | Oil & Gas Operator | Dec 1995 |
| 21 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 22 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 23 | Big 'J' Prod Com | | Oil & Gas Operator | Aug 1992 |
| 24 | Boger Brothers D | | Oil & Gas Operator | Nov 1992 |
| 25 | Boswell Energy C | | Oil & Gas Operator | Jun 1994 |
| 26 | Brange | | Oil & Gas Operator | Oct 2009 |
| 27 | C & G Oil Compan | | Oil & Gas Operator | Dec 1989 |
| 28 | C M X Incorporat | | Oil & Gas Operator | Dec 1996 |
| 29 | Case Oil & Gas I | | Oil & Gas Operator | Apr 1992 |
| 30 | Castelli Exploration Inc | Oklahoma City, OK 73162 | Oil & Gas Operator | Oct 2025 |
| 31 | Centennial Energy Company | Torrance, CA 90503 | Oil Operator | Jan 2000 |
| 32 | Central Energy C | | Oil & Gas Operator | Jun 1994 |
| 33 | Chenoweth, Dean | Haviland, KS 67059 | Oil Operator | Jun 1994 |
| 34 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 35 | Chevron U S A In | | Oil & Gas Operator | Sep 2000 |
| 36 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 37 | Cinco Exploratio | | Oil & Gas Operator | Jan 1988 |
| 38 | CMX, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 39 | Coastal Oil & Ga | | Oil & Gas Operator | Oct 1996 |
| 40 | Comanche Resources Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Nov 2025 |
| 41 | Condor Petroleum | | Oil & Gas Operator | Nov 1990 |
| 42 | Continental Ener | | Oil & Gas Operator | Dec 1996 |
| 43 | Cross Bar Petrol | | Oil Operator | Aug 1995 |
| 44 | Cross Bar Petroleum, Inc. | Wichita, KS 67205 | Oil & Gas Operator | Jun 2016 |
| 45 | D. R. Lauck Oil Co., Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jul 2019 |
| 46 | Davis & Fitzgera | | Gas Operator | Dec 1983 |
| 47 | Daystar Petroleum Inc | Eureka, KS 67045 | Oil & Gas Operator | Sep 2025 |
| 48 | Delhi Pipeline | | Oil & Gas Operator | Sep 1999 |
| 49 | Deutsch Oil Company | | Oil & Gas Operator | Sep 2025 |
| 50 | Dixon Operating Company, LLC | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 51 | DNB Drilling, Inc. | Wichita, KS 67208 | Oil & Gas Operator | Jan 2001 |
| 52 | Dunne-Gardner Pe | | Oil & Gas Operator | Nov 1992 |
| 53 | Dunne-Gardner Petroleum, Inc. | Wichita, KS 67202 | Gas Operator | Jun 2022 |
| 54 | Eagle Creek Corporation | Andover, KS 67002 | Oil & Gas Operator | Sep 2025 |
| 55 | Edison Operating Company LLC | Wichita, KS 67226 | Oil & Gas Operator | Sep 2025 |
| 56 | Einsel Gas Marketing | | Gas Operator | Feb 2019 |
| 57 | Elm III Operating Company LLC | Edmond, OK 73013 | Oil & Gas Operator | Sep 2025 |
| 58 | Emerson, Jim | Plano, TX 75074 | Oil & Gas Operator | Jan 1995 |
| 59 | Empire Energy E & P, LLC | Mayville, NY 14757 | Oil & Gas Operator | Mar 2019 |
| 60 | F.G. Holl Co., LLC | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 61 | Falcon Exploration, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 62 | Farrar Pump & Su | | Oil & Gas Operator | Dec 1996 |
| 63 | Fina Oil & Chemi | | Oil & Gas Operator | Oct 1995 |
| 64 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 65 | G & R Oil Co | St. John, KS 67576 | Oil Operator | Aug 2008 |
| 66 | Gear Petroleum Co Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2009 |
| 67 | Geodessa Corpora | | Oil Operator | Jul 1984 |
| 68 | GMX Resources, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2014 |
| 69 | Goodin, Raymond M. - Trust | Augusta, KS 67010 | Oil & Gas Operator | Jun 2000 |
| 70 | Gore Oil Company | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 71 | Gould Oil Inc. | Wichita, KS 67278 | Oil & Gas Operator | Oct 2019 |
| 72 | Gould Oil Incorp | | Oil & Gas Operator | May 1996 |
| 73 | Graham Royalty L | | Gas Operator | Mar 1991 |
| 74 | Graham-Michaelis | | Oil & Gas Operator | Nov 1996 |
| 75 | Graham-Michaelis Corporation | Wichita, KS 67201 | Oil & Gas Operator | Dec 2010 |
| 76 | Graybol-Patton C | | Oil & Gas Operator | Oct 1991 |
| 77 | Greensburg Oilfield LLC | Zenda, KS 67159 | Oil Operator | Nov 2013 |
| 78 | Grey, Huey P. | Greensburg, KS 67054 | Oil Operator | Dec 1984 |
| 79 | Grey, James H. | Greensburg, KS 67054 | Gas Operator | Nov 1988 |
| 80 | Gruss Petroleum | | Oil Operator | Jan 1986 |
| 81 | H & B Petroleum Corp. | Hutchinson, KS 67504 | Oil & Gas Operator | Sep 2025 |
| 82 | Hacker, Jack | Coats, KS 67028 | Oil & Gas Operator | Jul 2025 |
| 83 | Halliburton Oil | | Oil & Gas Operator | Sep 2008 |
| 84 | Harper Oil And Gas, LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 85 | HDH Resources, Inc. | Wilmore, KS 67155 | Oil & Gas Operator | Jul 2025 |
| 86 | Herman L. Loeb LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Sep 2025 |
| 87 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Sep 2025 |
| 88 | Hillenburg Oil C | | Oil Operator | Apr 1994 |
| 89 | Hillenburg Oil Co., A General Partnership | Broken Arrow, OK 74011 | Oil Operator | Sep 2025 |
| 90 | Hummon Corp | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2023 |
| 91 | Imperial Oil & G | | Gas Operator | Jan 1990 |
| 92 | Imperial Oil Com | | Oil & Gas Operator | Dec 1992 |
| 93 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Dec 2025 |
| 94 | Jetgo Oil Compan | | Oil & Gas Operator | Jan 1995 |
| 95 | Jordan Oil Management Inc. | Haysville, KS 67060 | Oil & Gas Operator | Sep 2025 |
| 96 | K & E Drilling I | | Oil & Gas Operator | Sep 1995 |
| 97 | K & E Drilling, Inc | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 98 | K & E Petroleum | | Oil & Gas Operator | Jan 1995 |
| 99 | K & E Petroleum, Inc. | San Antonio, TX 78230 | Oil & Gas Operator | Apr 2012 |
| 100 | K & N Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Sep 2025 |