| 1 | Abercrombie A L | | Oil & Gas Operator | Nov 1995 |
| 2 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 3 | American Warrior | | Oil & Gas Operator | Dec 2024 |
| 4 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Jan 2025 |
| 5 | Amoco Production | | Oil & Gas Operator | Jun 2012 |
| 6 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 7 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 8 | Anadarko Petrole | | Oil & Gas Operator | Dec 1996 |
| 9 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Feb 2025 |
| 10 | Anderson Oil LTD. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2025 |
| 11 | Arcadian Resources LLC | Glen Elder, KS 67446 | Oil & Gas Operator | Apr 2025 |
| 12 | Argent Energy, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 13 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2025 |
| 14 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Apr 2025 |
| 15 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2025 |
| 16 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2025 |
| 17 | Bear Petroleum LLC | Haysville, KS 67060 | Oil & Gas Operator | Dec 2024 |
| 18 | Becker Oil Corporation | Ponca City, OK 74602 | Oil & Gas Operator | Jan 2025 |
| 19 | Bengalia Land And Cattle Company | Tulsa, OK 74152 | Oil & Gas Operator | Dec 2024 |
| 20 | Beren Corporatio | | Oil & Gas Operator | Dec 1995 |
| 21 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Apr 2025 |
| 22 | Berexco Inc. | Wichita, KS 67208 | Oil & Gas Operator | Oct 2009 |
| 23 | Berexco Incorpor | | Oil & Gas Operator | Dec 1996 |
| 24 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Apr 2025 |
| 25 | Black Oak Exploration, LLC | Denver, CO 80210 | Oil & Gas Operator | Dec 2024 |
| 26 | Bonanza Carbon Capture, LLC | | Gas Operator | Dec 2024 |
| 27 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jan 2025 |
| 28 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2025 |
| 29 | Brigco LLC | Lakin, KS 67860 | Gas Operator | Dec 2023 |
| 30 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2025 |
| 31 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Feb 2025 |
| 32 | Castle Resources, Inc. | Russell, KS 67665 | Oil & Gas Operator | Dec 2024 |
| 33 | Chautauqua Oil And Gas LLC | Tulsa, OK 74145 | Oil & Gas Operator | Nov 2024 |
| 34 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2025 |
| 35 | Chevron U S A In | | Oil & Gas Operator | Sep 2000 |
| 36 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 37 | Chief Drilling C | | Oil & Gas Operator | Feb 1995 |
| 38 | Cig Exploration | Denver, CO 80201 | Oil & Gas Operator | Sep 1999 |
| 39 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 40 | Cisco Operating LLC | Plano, TX 75024 | Oil & Gas Operator | Feb 2025 |
| 41 | City Of Garden City, Kansas | Garden City, KS 67846 | Gas Operator | Dec 2024 |
| 42 | City Of Hugoton, Kansas | Hugoton, KS 67951 | Gas Operator | Dec 2024 |
| 43 | Coastal Oil & Ga | | Oil & Gas Operator | Oct 1996 |
| 44 | Colorado Interstate Gas Company LLC | Colorado Springs, CO 80944 | Oil & Gas Operator | Feb 2025 |
| 45 | Continental Ener | | Oil & Gas Operator | Dec 1996 |
| 46 | Continental Energy | Garden City, KS 67846-0918 | Oil & Gas Operator | Jul 2017 |
| 47 | Cross Bar Petrol | | Oil Operator | Aug 1995 |
| 48 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2024 |
| 49 | D. R. Lauck Oil Co., Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jul 2019 |
| 50 | Daystar Petroleum, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Dec 2024 |
| 51 | Derrick Resources Inc. | Henryetta, OK 74437-4249 | Oil & Gas Operator | Jan 2025 |
| 52 | Devon Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2009 |
| 53 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 54 | Discovery Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 55 | DKM Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2011 |
| 56 | Eagle Creek Corporation | Andover, KS 67002 | Oil & Gas Operator | Dec 2024 |
| 57 | Edison Operating Company LLC | Wichita, KS 67226 | Oil & Gas Operator | Dec 2024 |
| 58 | Elm III Operating Company LLC | Edmond, OK 73013 | Oil & Gas Operator | Dec 2024 |
| 59 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 60 | Energy Explorati | | Oil & Gas Operator | Oct 1993 |
| 61 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 62 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Jan 2025 |
| 63 | Extreme Energy Co | | Oil & Gas Operator | Dec 2024 |
| 64 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Dec 2024 |
| 65 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2025 |
| 66 | Geo. R. Shaw Living Trust | Wichita, KS 67202 | Gas Operator | Dec 2009 |
| 67 | Global Natural R | | Oil & Gas Operator | Oct 1990 |
| 68 | Graham-Michaelis | | Oil & Gas Operator | Nov 1996 |
| 69 | Great Plains Petroleum, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Dec 2024 |
| 70 | Griffin, Charles N. | Pratt, KS 67124 | Oil & Gas Operator | Dec 2024 |
| 71 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 72 | H & B Petroleum Corp. | Hutchinson, KS 67504 | Oil & Gas Operator | Dec 2024 |
| 73 | H & C Oil Operating Inc. | Plainville, KS 67663 | Oil & Gas Operator | Dec 2024 |
| 74 | Harris Oil & Gas | | Oil & Gas Operator | Jul 1995 |
| 75 | Harris Oil & Gas Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2016 |
| 76 | Hartman Oil Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Dec 2024 |
| 77 | Hartman W L Trus | | Oil Operator | Jun 1992 |
| 78 | Helmerich & Payn | | Oil & Gas Operator | Aug 1995 |
| 79 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2025 |
| 80 | Herman L. Loeb, LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Dec 2024 |
| 81 | Hess Oil Company | McPherson, KS 67460 | Oil & Gas Operator | Dec 2024 |
| 82 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Dec 2024 |
| 83 | High Plains Production, LLC | Murray, KY 42071 | Oil & Gas Operator | Dec 2024 |
| 84 | HJ, Inc. | Garden City, KS 67846 | Oil & Gas Operator | Dec 2024 |
| 85 | Hugoton Energy C | | Oil & Gas Operator | Feb 2004 |
| 86 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 87 | Hummon Corp. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2023 |
| 88 | Intermountain Refining Co, Inc | Farmington, NM 87499 | Gas Operator | Aug 2006 |
| 89 | K & L Tank Truck Service, Inc. | Garden City, KS 67846 | Oil Operator | Apr 2023 |
| 90 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Apr 2025 |
| 91 | Kansas Natural Gas Operating, LC | Hays, KS 67601 | Gas Operator | Dec 2024 |
| 92 | Kansas Natural Gas, Inc. | Hays, KS 67601 | Gas Operator | Dec 2024 |
| 93 | Landmark Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Dec 2024 |
| 94 | Landowner | Honolulu, HI | Oil & Gas Operator | Dec 2008 |
| 95 | Lang Herman Oil | | Oil & Gas Operator | Dec 1996 |
| 96 | Lang, Herman - Marital Trust | Garden City, KS 67846 | Oil & Gas Operator | Dec 2024 |
| 97 | Lang, Kenneth R. | Garden City, KS 67846 | Oil & Gas Operator | Dec 2024 |
| 98 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Apr 2025 |
| 99 | Larson Operating | | Oil & Gas Operator | Mar 2001 |
| 100 | Larson Operating Company | Olmitz, KS 67564-8561 | Oil & Gas Operator | Dec 2019 |