| 1 | Agv Corp. | Attica, KS 67009 | Oil & Gas Operator | Sep 2025 |
| 2 | American Energie | | Oil & Gas Operator | May 1995 |
| 3 | American Oilfield Systems, Inc. | Nichols Hill, OK 73116 | Oil & Gas Operator | Jun 2001 |
| 4 | American Warrior | | Oil & Gas Operator | Sep 2025 |
| 5 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Oct 2025 |
| 6 | American Warrior, In | | Oil & Gas Operator | Sep 2024 |
| 7 | Anadarko Petrole | | Oil & Gas Operator | Dec 1996 |
| 8 | Anchor Bay Corporation | Denver, CO 80202 | Oil & Gas Operator | Jun 2007 |
| 9 | Apex Resources LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 10 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 11 | Ares Energy, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 12 | Banks Oil - Lee | | Oil & Gas Operator | Jun 1995 |
| 13 | Banks Oil Co | | Oil & Gas Operator | Sep 2025 |
| 14 | Barfield Oil Cor | | Oil Operator | Oct 1995 |
| 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 | Beren Corporatio | | Oil & Gas Operator | Dec 1995 |
| 19 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 20 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 21 | Bird Energy Inco | | Oil & Gas Operator | Mar 1993 |
| 22 | Braden-Deem Inc | Wichita, KS 67226 | Oil & Gas Operator | Oct 2025 |
| 23 | Braden-Deem Inco | | Oil & Gas Operator | Nov 1994 |
| 24 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 25 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 26 | C. J. Filson, LLC | Protection, KS 67127 | Gas Operator | Aug 2014 |
| 27 | Cambron, Paul L. | Ness City, KS 67560 | Oil & Gas Operator | Dec 2019 |
| 28 | Canaday Oil Corp | Goddard, KS 67052 | Oil & Gas Operator | Sep 2025 |
| 29 | Castelli Exploration Inc | Oklahoma City, OK 73162 | Oil & Gas Operator | Oct 2025 |
| 30 | Charter Producti | | Oil & Gas Operator | Jun 1994 |
| 31 | Chesapeake Energy Marketing, Inc. | | Oil & Gas Operator | Jan 2025 |
| 32 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 33 | Clark Exploration Company | Highlands Ranch, CO 80126-7645 | Oil & Gas Operator | Nov 2024 |
| 34 | Cleary Petroleum Corporation | Edmond, OK 73083 | Oil & Gas Operator | Jul 2019 |
| 35 | Clute Oil Corporation | Cherry Hills VIllage, CO 80113 | Oil & Gas Operator | Sep 2025 |
| 36 | Cody Resources, Inc. | Midland, TX 79705 | Oil & Gas Operator | Sep 2002 |
| 37 | Comanche Resources Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Nov 2025 |
| 38 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 39 | Continental Ener | | Oil & Gas Operator | Dec 1996 |
| 40 | Coral Coast Petroleum, L.C. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 41 | Corsair Energy, LC | Wichita, KS 67202 | Oil & Gas Operator | Apr 2004 |
| 42 | Cotton Petroleum | | Oil & Gas Operator | May 1988 |
| 43 | Daystar Petroleum Inc | Eureka, KS 67045 | Oil & Gas Operator | Sep 2025 |
| 44 | Delhi Gas Pipeli | | Gas Operator | Aug 1998 |
| 45 | Delhi Pipeline | | Oil & Gas Operator | Sep 1999 |
| 46 | Derrick Resources Inc | Henryetta, OK 74437-4249 | Oil & Gas Operator | Oct 2025 |
| 47 | Deutsch Oil Company | | Oil & Gas Operator | Sep 2025 |
| 48 | Diamond Chemical | | Oil & Gas Operator | Jan 1995 |
| 49 | Dominion Oklahoma Texas Expl & Prod Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2013 |
| 50 | Edison Operating Company LLC | Wichita, KS 67226 | Oil & Gas Operator | Sep 2025 |
| 51 | Elm III Operating Company LLC | Edmond, OK 73013 | Oil & Gas Operator | Sep 2025 |
| 52 | Elysium Energy, L.L.C | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
| 53 | Energy Reserves | | Oil & Gas Operator | Oct 1993 |
| 54 | Enron Corporatio | | Oil & Gas Operator | Aug 1999 |
| 55 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 56 | Estate Of Crawford Oil & Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | Aug 2006 |
| 57 | Everglow Energy, LLC | Oklahoma City, OK 73162 | Oil & Gas Operator | Sep 2025 |
| 58 | Evergreen Operating Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 59 | Exok Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Oct 2025 |
| 60 | F.G. Holl Co., LLC | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 61 | Faulconer, Vernon E., Inc. | Tyler, TX 75711 | Oil & Gas Operator | Nov 2025 |
| 62 | Five Star Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Nov 2025 |
| 63 | Frontier Oil Com | | Oil & Gas Operator | May 1995 |
| 64 | Gary-Williams Co (The) | Denver, CO 80202 | Oil Operator | Nov 2009 |
| 65 | Gould Oil Inc. | Wichita, KS 67278 | Oil & Gas Operator | Oct 2019 |
| 66 | Graham-Michaelis | | Oil & Gas Operator | Nov 1996 |
| 67 | Grand Mesa Operating Company | Wichita, KS 67206 | Oil & Gas Operator | Nov 2025 |
| 68 | Graves Drilling Co., Inc. | Wichita, KS 67208 | Oil & Gas Operator | Sep 2025 |
| 69 | Great Plains Petroleum, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Sep 2025 |
| 70 | Griggs Oil Incor | | Oil & Gas Operator | May 1994 |
| 71 | Grizzly Energy Resources, L.L.C. | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 72 | H & B Petroleum Corp. | Hutchinson, KS 67504 | Oil & Gas Operator | Sep 2025 |
| 73 | Halliburton Oil | | Oil & Gas Operator | Sep 2008 |
| 74 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 75 | Hallwood Petrole | | Oil & Gas Operator | Apr 1999 |
| 76 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 77 | Hayes Oil & Gas LLC | Attica, KS 67009 | Oil & Gas Operator | Sep 2025 |
| 78 | HDH Resources, Inc. | Wilmore, KS 67155 | Oil & Gas Operator | Jul 2025 |
| 79 | Held By Producti | | Oil & Gas Operator | Feb 1995 |
| 80 | Herman L. Loeb LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Sep 2025 |
| 81 | Hess Oil Company | McPherson, KS 67460 | Oil & Gas Operator | Sep 2025 |
| 82 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Dec 2025 |
| 83 | Huber J M Corpor | | Oil & Gas Operator | Dec 1996 |
| 84 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 85 | Hummon Corp | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2023 |
| 86 | Imperial Oil Properties, Inc. | Wichita, KS 67201 | Oil & Gas Operator | Jun 2006 |
| 87 | Iuka-Carmi Development LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 88 | J-F Oil Company LLC | Hays, KS 67601 | Oil & Gas Operator | Dec 2002 |
| 89 | J-W Operating Company | Christoval, TX 76935 | Oil & Gas Operator | Dec 2025 |
| 90 | Jade Resources I | | Gas Operator | Jan 1989 |
| 91 | James B. Read Operating, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Sep 2025 |
| 92 | JBG Oil & Gas Company LLC | Ashland, KS 67831 | Oil & Gas Operator | Jul 2025 |
| 93 | JHL Energy, Inc. | Wichita, KS 67209 | Oil & Gas Operator | Apr 2016 |
| 94 | JHS Energy, Inc | Denver, CO 80222 | Oil & Gas Operator | Sep 2025 |
| 95 | Jordan Oil Management Inc. | Haysville, KS 67060 | Oil & Gas Operator | Sep 2025 |
| 96 | K R M Petroleum | | Oil & Gas Operator | Jan 1990 |
| 97 | KBW Oil & Gas Co | Kiowa, KS 67070 | Oil & Gas Operator | Jul 2024 |
| 98 | Kirkman W L Inco | | Oil & Gas Operator | Dec 1994 |
| 99 | L. D. Drilling, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Sep 2025 |
| 100 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Dec 2025 |