| 1 | 6G Twister, Inc. | Gillette, WY 82717 | Oil Operator | Jul 2012 |
| 2 | Abercrombie A L | | Oil & Gas Operator | Nov 1995 |
| 3 | Abercrombie A L Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2025 |
| 4 | Abercrombie Dril | | Oil Operator | Jan 1990 |
| 5 | Abercrombie Energy, LLC | Wichita, KS 67212 | Oil & Gas Operator | Dec 2025 |
| 6 | Adelaide Energy LLC | FT Morgan, CO 80701 | Oil Operator | Dec 2025 |
| 7 | American Energie | | Oil & Gas Operator | May 1995 |
| 8 | American Warrior | | Oil & Gas Operator | Dec 2025 |
| 9 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Jan 2026 |
| 10 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Dec 2025 |
| 11 | Arcadian Resources LLC | Glen Elder, KS 67446 | Oil & Gas Operator | Apr 2026 |
| 12 | Argent Energy, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 13 | Argonaut Energy | | Oil & Gas Operator | Aug 1991 |
| 14 | Ash, Wiley R., Jr. | Andover, KS 67002 | Oil & Gas Operator | Mar 1990 |
| 15 | Bach Oil Production | | Oil Operator | Dec 2025 |
| 16 | Bankoff Oil Comp | | Oil Operator | Jun 1995 |
| 17 | Belport Oil Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2026 |
| 18 | Benchmark Oil & Gas Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 19 | Bentley Oil & Gas Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2026 |
| 20 | Beren Corporatio | | Oil & Gas Operator | Dec 1995 |
| 21 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Apr 2026 |
| 22 | Berexco Incorpor | | Oil & Gas Operator | Dec 1996 |
| 23 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Apr 2026 |
| 24 | Black Oak Exploration, LLC | Denver, CO 80210 | Oil & Gas Operator | Dec 2025 |
| 25 | Blue Goose Drill | | Oil Operator | Aug 1991 |
| 26 | Blue Goose Drilling Company, Inc. | Great Bend, KS 67530 | Oil Operator | Dec 2025 |
| 27 | Brito Oil Co., Inc | Wichita, KS 67201 | Oil & Gas Operator | Dec 2009 |
| 28 | C. H. Todd, Inc. | Wichita, KS 67212 | Oil & Gas Operator | Dec 2019 |
| 29 | Cambron, Paul L. | Ness City, KS 67560 | Oil & Gas Operator | Dec 2019 |
| 30 | Carmen Schmitt, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2025 |
| 31 | Castle Resources, Inc. | Russell, KS 67665 | Oil & Gas Operator | Dec 2025 |
| 32 | Champion Petrole | | Oil Operator | Jan 1992 |
| 33 | Charter Energy, Inc. | Great Bend, KS 67530 | Oil Operator | Dec 2025 |
| 34 | Cheyenne Oil Services, Inc. | Ness City, KS 67560 | Oil Operator | Nov 2023 |
| 35 | Chief Drilling C | | Oil & Gas Operator | Feb 1995 |
| 36 | Chief Drilling, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Sep 1997 |
| 37 | Citadel Oil LLC | Edmond, OK 73083 | Oil Operator | Dec 2025 |
| 38 | Cla-Mar Oil Company, LLC | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 39 | Coachman Energy Operating Co, LLC | Englewood, CO 80111 | Oil Operator | May 2024 |
| 40 | Coats Energy, Inc. | Wichita, KS 67201 | Oil & Gas Operator | Dec 2025 |
| 41 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Dec 2025 |
| 42 | Continental Ener | | Oil & Gas Operator | Dec 1996 |
| 43 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Dec 2025 |
| 44 | Damar Resc Incor | | Oil Operator | Oct 1995 |
| 45 | Damar Resources, Inc. | Hays, KS 67601 | Oil & Gas Operator | Aug 2025 |
| 46 | Darrah John J Jr | | Oil & Gas Operator | Oct 1994 |
| 47 | Darrah Oil Company, LLC | Wichita, KS 67201 | Oil & Gas Operator | Apr 2026 |
| 48 | Davis Petroleum | | Oil & Gas Operator | Dec 1996 |
| 49 | Davis Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Aug 2021 |
| 50 | Daystar Petroleum Inc | Eureka, KS 67045 | Oil & Gas Operator | Dec 2025 |
| 51 | Denis Roberts Oil | | Oil Operator | Nov 2025 |
| 52 | DGH Oil, LLC | Logan, KS 67646 | Oil Operator | Dec 2025 |
| 53 | Discovery Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2026 |
| 54 | Donald C. Slawson | | Oil Operator | Jun 1985 |
| 55 | Double Eagle Exp | | Oil Operator | Jul 1992 |
| 56 | Double Eagle Exploration Inc | Windthorst, TX 76389 | Oil Operator | Dec 2025 |
| 57 | Dunne Oil Co. | Wichita, KS 67202 | Oil Operator | Apr 1999 |
| 58 | Elevate Energy LTD | Aurora, CO 80016 | Oil & Gas Operator | Dec 2025 |
| 59 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 60 | Encore Operating Company | Denver, CO 80227 | Oil & Gas Operator | Dec 2019 |
| 61 | Evans Energy, LLC | Mount Hope, KS 67108 | Oil & Gas Operator | Dec 2025 |
| 62 | Extreme Energy Co | | Oil & Gas Operator | Dec 2025 |
| 63 | Falcon Exploration, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Dec 2025 |
| 64 | Farmer John O Inc | Russell, KS 67665 | Oil & Gas Operator | Dec 2025 |
| 65 | Flatirons Resources LLC | Westminster, CO 80021 | Oil & Gas Operator | Dec 2022 |
| 66 | Forestar Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2017 |
| 67 | Fritzler Trucking, Inc. | Ness City, KS 67560 | Oil Operator | Sep 2007 |
| 68 | G.A.B.S. Oil, A General Partnership | Ness City, KS 67560 | Oil Operator | Aug 2008 |
| 69 | Galloway Petrole | | Oil Operator | Jun 1993 |
| 70 | Gerstner, Joe | Ness City, KS 67560 | Oil Operator | Mar 2016 |
| 71 | Globe Operating, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2019 |
| 72 | Gore Oil Company | Wichita, KS 67202 | Oil & Gas Operator | Dec 2025 |
| 73 | Grand Mesa Operating Company | Wichita, KS 67206 | Oil & Gas Operator | Jan 2026 |
| 74 | H & B Petroleum Corp. | Hutchinson, KS 67504 | Oil & Gas Operator | Dec 2025 |
| 75 | H & C Oil Operating Inc. | Plainville, KS 67663 | Oil & Gas Operator | Dec 2025 |
| 76 | H & M Petroleum Corporation | Lincoln, NE 68516 | Oil & Gas Operator | Jun 2025 |
| 77 | H-30 Incorporate | | Oil & Gas Operator | Nov 1990 |
| 78 | Hansen Dane G TR | | Oil Operator | Feb 1995 |
| 79 | Hansen, Dane G. - Trust | Logan, KS 67646 | Oil Operator | Oct 2013 |
| 80 | Helmerich & Payn | | Oil & Gas Operator | Aug 1995 |
| 81 | Hembree Robert F | | Oil Operator | Dec 2009 |
| 82 | Herman L. Loeb LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Dec 2025 |
| 83 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Dec 2025 |
| 84 | Hoover Noble C | | Oil Operator | Nov 1992 |
| 85 | Igwt, Inc. | Rose Hill, KS 67133 | Oil & Gas Operator | Dec 2025 |
| 86 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2026 |
| 87 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Jan 2026 |
| 88 | Jason Oil Company, LLC | Russell, KS 67665 | Oil Operator | Dec 2025 |
| 89 | Jetgo Oil Compan | | Oil & Gas Operator | Jan 1995 |
| 90 | JHS Energy, Inc | Denver, CO 80222 | Oil & Gas Operator | Dec 2025 |
| 91 | K R M Petroleum | | Oil & Gas Operator | Jan 1990 |
| 92 | Kaiser-Francis O | | Oil & Gas Operator | Oct 1995 |
| 93 | Kaiser-Francis Oil | | Oil Operator | Nov 1995 |
| 94 | Knighton Oil Company, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 95 | Krier, Kirby Oil, Inc. | Claflin, KS 67525 | Oil Operator | Dec 2025 |
| 96 | L B Petroleum In | | Oil Operator | Nov 1995 |
| 97 | L. D. Drilling, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2025 |
| 98 | Landmark Oil Exp | | Oil Operator | Sep 1994 |
| 99 | Landmark Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Dec 2025 |
| 100 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Apr 2026 |