| 1 | 6G Twister, Inc. | Gillette, WY 82717 | Oil Operator | Jul 2012 |
| 2 | A & A Discovery, Inc | Hill City, KS 67642 | Oil Operator | Aug 2002 |
| 3 | A & A Discovery, LLC | Hill City, KS 67642 | Oil Operator | May 2018 |
| 4 | A & A Production | | Oil Operator | Feb 2013 |
| 5 | Abercrombie A L | | Oil & Gas Operator | Nov 1995 |
| 6 | Abercrombie Energy, LLC | Wichita, KS 67212 | Oil & Gas Operator | Jun 2025 |
| 7 | Abraxas Petroleu | | Oil Operator | May 1986 |
| 8 | Ainsworth Operat | | Oil Operator | Apr 1995 |
| 9 | Ainsworth Operating Co. | Salem, OR 97302 | Oil Operator | Jun 2025 |
| 10 | Alliance Energy LLC | Hutchinson, KS 67501 | Oil & Gas Operator | Jun 2025 |
| 11 | Allison J A | | Oil & Gas Operator | Nov 1995 |
| 12 | American Energie | | Oil & Gas Operator | May 1995 |
| 13 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Jun 2025 |
| 14 | Anderson Energy, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Apr 2025 |
| 15 | Anderson Thornto | | Oil & Gas Operator | Mar 1995 |
| 16 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Jun 2025 |
| 17 | Argent Energy (Us) Holdings Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Sep 2021 |
| 18 | Arp Operating, LLC | Denver, CO 80202 | Oil Operator | Jun 2025 |
| 19 | Arrowhead Petrol | | Oil & Gas Operator | Feb 1992 |
| 20 | Asher Associates Inc | Centennial, CO 80112 | Oil & Gas Operator | Aug 2016 |
| 21 | B J Oil Company | Corsicana, TX 75109 | Oil & Gas Operator | Oct 2025 |
| 22 | Bach Oil Production | | Oil Operator | Jun 2025 |
| 23 | Baird Oil Company LLC | Logan, KS 67646 | Oil Operator | Jun 2025 |
| 24 | Barracuda Operating Company | Ness City, KS 67560 | Oil Operator | Jun 2025 |
| 25 | Basgall Oil LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 26 | Beacon Explorati | | Oil Operator | Apr 1987 |
| 27 | Benchmark Oil & | | Oil Operator | Dec 1996 |
| 28 | Benchmark Oil & Gas Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 29 | Beren Corporatio | | Oil & Gas Operator | Dec 1995 |
| 30 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Oct 2025 |
| 31 | Berexco Incorpor | | Oil & Gas Operator | Dec 1996 |
| 32 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Oct 2025 |
| 33 | Bitter Spar LLC | Wichita, KS 67226 | Oil & Gas Operator | Jun 2025 |
| 34 | Black Diamond Oil, Inc. | Hays, KS 67601 | Oil Operator | Apr 2019 |
| 35 | Black Petroleum | | Oil Operator | Sep 1989 |
| 36 | Black Petroleum Company | Wichita, KS 67277 | Oil Operator | Jan 2004 |
| 37 | Blake Exploration, LLC | Bogue, KS 67625 | Oil Operator | Jun 2025 |
| 38 | Blueridge Petroleum Corporation | Edmond, OK 73003 | Oil & Gas Operator | Jun 2025 |
| 39 | Bowles, Jack | Edmond, OK 73083 | Oil Operator | Apr 2020 |
| 40 | Bowman Oil Compa | | Oil Operator | Feb 1994 |
| 41 | Bowman Oil Company, A General Partnership | Codell, KS 67663 | Oil Operator | Jun 2025 |
| 42 | Boyer Jay C | | Oil Operator | Feb 1994 |
| 43 | Brougher Oil, Inc. | Wichita, KS 67212 | Oil & Gas Operator | Apr 2002 |
| 44 | Burch Exploratio | | Oil Operator | Mar 1991 |
| 45 | C & S Oil Company, LLC | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 46 | Calvin Noah, LLC | Valley Center, KS 67147 | Oil Operator | Jun 2025 |
| 47 | Canyon Operating LLC | Dallas, TX 75225 | Oil & Gas Operator | Oct 2025 |
| 48 | Castelli Exploration, Inc. | Oklahoma City, OK 73162 | Oil & Gas Operator | Jun 2025 |
| 49 | Castle Resources | | Oil Operator | Jul 2002 |
| 50 | Charter Energy, Inc. | Great Bend, KS 67530 | Oil Operator | Jun 2025 |
| 51 | Chief Drilling C | | Oil & Gas Operator | Feb 1995 |
| 52 | Chizum Oil LLC | Wichita, KS 67211 | Oil & Gas Operator | Jun 2025 |
| 53 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Oct 2025 |
| 54 | Clute Oil Corporation | Cherry Hills VIllage, CO 80113 | Oil & Gas Operator | Jun 2025 |
| 55 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 56 | Collins John B | | Oil Operator | Sep 1994 |
| 57 | Compass Exploration LLC | Hill City, KS 67642 | Oil Operator | May 2025 |
| 58 | Condor Energy | | Oil Operator | Aug 1995 |
| 59 | Continental Oil | | Oil Operator | Jun 1985 |
| 60 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Jun 2025 |
| 61 | Corsair Energy, LC | Wichita, KS 67202 | Oil & Gas Operator | Apr 2004 |
| 62 | Crimson Resources, LLC | Tulsa, OK 74133 | Oil Operator | Jul 2007 |
| 63 | CWB Oil Company, LLC | St. Francis, KS 67756 | Oil Operator | Jun 2025 |
| 64 | D & L Energy | Morland, KS 67650 | Oil Operator | Mar 1995 |
| 65 | Dakota Resources | | Oil & Gas Operator | Jan 1989 |
| 66 | Damar Resources, Inc. | Hays, KS 67601 | Oil & Gas Operator | Apr 2025 |
| 67 | Darrah John Jay Jr | Wichita, KS 67201 | Oil & Gas Operator | Aug 2025 |
| 68 | Darrah Oil Company LLC | Wichita, KS 67201 | Oil & Gas Operator | Oct 2025 |
| 69 | Davis Petroleum | | Oil & Gas Operator | Dec 1996 |
| 70 | Davis Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Aug 2021 |
| 71 | DGH Oil, LLC | Logan, KS 67646 | Oil Operator | Jun 2025 |
| 72 | DHP Investments, LTD. | Tyler, TX 75703 | Oil Operator | Jun 2025 |
| 73 | Diehl Oil Inc | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 74 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Aug 2025 |
| 75 | Don Karst Well Service, Inc. | Russell, KS 67665 | Oil Operator | May 2025 |
| 76 | Double Eagle Exp | | Oil Operator | Jul 1992 |
| 77 | Double Eagle Exploration Inc | Windthorst, TX 76389 | Oil Operator | Jun 2025 |
| 78 | Downing-Nelson Oil Co Inc | Hays, KS 67601 | Oil & Gas Operator | Jun 2025 |
| 79 | Drake Exploration LLC | Arkansas City, KS 67005 | Oil & Gas Operator | Jun 2025 |
| 80 | Dreiling Exploration LLC | Victoria, KS 67671 | Oil Operator | Mar 2018 |
| 81 | Dreiling Oil Inc | Hays, KS 67601 | Oil Operator | Jun 2018 |
| 82 | Du Pont Oil Comp | | Oil Operator | May 1984 |
| 83 | E & B Natural Resources Management Corporation | Hays, KS 67601 | Oil & Gas Operator | Aug 2025 |
| 84 | Eagle River Energy Corporation | Broken Arrow, OK 74011 | Oil & Gas Operator | Jun 2025 |
| 85 | Ego Operating LLC | Boca Raton, FL 33431 | Oil Operator | Dec 2019 |
| 86 | Elysium Energy, L.L.C. | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
| 87 | Empire Energy E&P, LLC | Mayville, NY 14757 | Oil & Gas Operator | Mar 2019 |
| 88 | Encore Operating Company | Denver, CO 80227 | Oil & Gas Operator | Dec 2019 |
| 89 | Energy One Oil Operations | | Oil Operator | Mar 2003 |
| 90 | Energy Productio | | Oil & Gas Operator | Jan 1986 |
| 91 | Energy Reserves | | Oil & Gas Operator | Oct 1993 |
| 92 | Energy Sources I | | Oil & Gas Operator | Jul 1986 |
| 93 | Energy Three, Inc. | Jackson, MS 39211 | Oil & Gas Operator | Jun 2025 |
| 94 | Eternity Exploration, LLC | Coppell, TX 75019 | Oil Operator | Feb 2025 |
| 95 | F & M Oil Compan | | Oil & Gas Operator | Feb 1993 |
| 96 | F & M Oil Company Inc | Pettus, TX 78146 | Oil & Gas Operator | Oct 2025 |
| 97 | Farmer, John O., Inc. | Russell, KS 67665 | Oil & Gas Operator | Jun 2025 |
| 98 | Fell Oil & Gas C | | Oil Operator | Oct 1991 |
| 99 | Flatirons Resources LLC | Westminster, CO 80021 | Oil & Gas Operator | Dec 2022 |
| 100 | Forestar Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2017 |