| 1 | 3G Production, LLC | Pratt, KS 67124 | Oil & Gas Operator | Jun 2025 |
| 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. Scott Ritchie | | Oil Operator | Mar 1985 |
| 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 | Afg Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2009 |
| 9 | Ainsworth Operating Co. | Salem, OR 97302 | Oil Operator | Jun 2025 |
| 10 | Al-La-Lyn Oil, Inc. | Ellis, KS 67637 | Oil Operator | Nov 2003 |
| 11 | Allison J A | | Oil & Gas Operator | Nov 1995 |
| 12 | American Energie | | Oil & Gas Operator | May 1995 |
| 13 | American Tank Service LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 14 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Jun 2025 |
| 15 | Amoco Production | | Oil & Gas Operator | Jun 2012 |
| 16 | Anchor Bay Corporation | Denver, CO 80202 | Oil & Gas Operator | Jun 2007 |
| 17 | Anderson Energy, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Apr 2025 |
| 18 | Angle Exploratio | | Oil Operator | Jan 1987 |
| 19 | Angle Oil Compan | | Oil Operator | Jun 1994 |
| 20 | Angle Oil Company | Hays, KS 67601 | Oil Operator | Sep 2002 |
| 21 | Arcadian Resources LLC | Glen Elder, KS 67446 | Oil & Gas Operator | Oct 2025 |
| 22 | Arlian, Inc. | Denver, CO 80202 | Oil Operator | Feb 1998 |
| 23 | Arrow Oil Operat | | Oil Operator | Nov 1991 |
| 24 | Arrowhead Exploration, LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 25 | Arrowhead Petroleum Of Kansas, Inc. | Wellington, KS 67152 | Oil & Gas Operator | Oct 2004 |
| 26 | Baker Oil Incorp | | Oil Operator | Oct 1985 |
| 27 | Banks Oil - Lee | | Oil & Gas Operator | Jun 1995 |
| 28 | Barton Exploration, Inc. | Hays, KS 67601 | Oil & Gas Operator | Jun 2025 |
| 29 | Basgall Oil LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 30 | Basin Operating Services LLC | Oklahoma City, OK 73106-5615 | Oil & Gas Operator | Jun 2025 |
| 31 | Bear Petroleum | | Oil & Gas Operator | Dec 1996 |
| 32 | Bear Petroleum LLC | Haysville, KS 67060 | Oil & Gas Operator | Jun 2025 |
| 33 | Benchmark Oil & Gas Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 34 | Beren Corporatio | | Oil & Gas Operator | Dec 1995 |
| 35 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Oct 2025 |
| 36 | Berexco Incorpor | | Oil & Gas Operator | Dec 1996 |
| 37 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Oct 2025 |
| 38 | Big Bear Resourc | | Oil Operator | Jan 1989 |
| 39 | Black Diamond Oil, Inc. | Hays, KS 67601 | Oil Operator | Apr 2019 |
| 40 | Blackhawk Production Company | | Oil Operator | Jun 2025 |
| 41 | Bolding Grady Co | | Oil & Gas Operator | Nov 1995 |
| 42 | Bowman Oil Company, A General Partnership | Codell, KS 67663 | Oil Operator | Jun 2025 |
| 43 | Brungardt Oil And Leasing Inc. | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 44 | C & R Drilling C | | Oil Operator | Aug 1994 |
| 45 | Calvin Noah, LLC | Valley Center, KS 67147 | Oil Operator | Jun 2025 |
| 46 | Carmen Schmitt, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jun 2025 |
| 47 | Castle Resources | | Oil Operator | Jul 2002 |
| 48 | Castle Resources, Inc. | Russell, KS 67665 | Oil & Gas Operator | Jun 2025 |
| 49 | Central Operating Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2025 |
| 50 | Charter Energy, Inc. | Great Bend, KS 67530 | Oil Operator | Jun 2025 |
| 51 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Oct 2025 |
| 52 | Chief Drilling C | | Oil & Gas Operator | Feb 1995 |
| 53 | Cholla Production LLC | Littleton, CO 80127 | Oil & Gas Operator | Jun 2025 |
| 54 | Cincris Energy C | | Oil & Gas Operator | Jun 1991 |
| 55 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Oct 2025 |
| 56 | Clark Operating Services, Inc. | Okmulgee, OK 74447 | Oil & Gas Operator | May 2013 |
| 57 | CMX, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 58 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 59 | Collins John B | | Oil Operator | Sep 1994 |
| 60 | Columbian Servic | | Oil & Gas Operator | Nov 1993 |
| 61 | Continental Ener | | Oil & Gas Operator | Dec 1996 |
| 62 | Coral Coast Petroleum, L.C. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 63 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Jun 2025 |
| 64 | Corie Oil Compan | | Oil Operator | Jul 1985 |
| 65 | Craig Oil Compan | | Oil Operator | Jul 1996 |
| 66 | Craig Oil Company | | Oil Operator | Dec 2019 |
| 67 | Curt'S Oil Operation, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Jun 2025 |
| 68 | CWB Oil Company, LLC | St. Francis, KS 67756 | Oil Operator | Jun 2025 |
| 69 | Dakota Resources | | Oil & Gas Operator | Jan 1989 |
| 70 | Damar Resources, Inc. | Hays, KS 67601 | Oil & Gas Operator | Apr 2025 |
| 71 | Dane G. Hansen Trust | | Oil Operator | Dec 1994 |
| 72 | Darrah John J Jr | | Oil & Gas Operator | Oct 1994 |
| 73 | Darrah John Jay Jr | Wichita, KS 67201 | Oil & Gas Operator | Aug 2025 |
| 74 | Darrah Oil Company LLC | Wichita, KS 67201 | Oil & Gas Operator | Oct 2025 |
| 75 | Davis Petroleum | | Oil & Gas Operator | Dec 1996 |
| 76 | Davis Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Aug 2021 |
| 77 | Daystar Petroleum, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Jun 2025 |
| 78 | Decab Company | Victoria, KS 67671 | Oil Operator | Aug 1996 |
| 79 | Diehl Glenn D Oi | | Oil Operator | Jul 1993 |
| 80 | Diehl Oil Inc | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 81 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Aug 2025 |
| 82 | Double "K" Oil, Inc. | Ellis, KS 67637 | Oil Operator | Dec 2019 |
| 83 | Double D'S LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 84 | Downing-Nelson Oil Co Inc | Hays, KS 67601 | Oil & Gas Operator | Jun 2025 |
| 85 | DR Well Operator | | Oil Operator | Jan 1990 |
| 86 | Dreiling Oil Inc | Hays, KS 67601 | Oil Operator | Jun 2018 |
| 87 | Dunne Equities I | | Oil & Gas Operator | Dec 1995 |
| 88 | E & B Natural Resources Management Corporation | Hays, KS 67601 | Oil & Gas Operator | Aug 2025 |
| 89 | Edison Operating Company LLC | Wichita, KS 67226 | Oil & Gas Operator | Jun 2025 |
| 90 | Elevate Energy LTD | Aurora, CO 80016 | Oil & Gas Operator | Jun 2025 |
| 91 | Encore Operating Company | Denver, CO 80227 | Oil & Gas Operator | Dec 2019 |
| 92 | Energy Explorati | | Oil & Gas Operator | Oct 1993 |
| 93 | Energy One Oil Operations | | Oil Operator | Mar 2003 |
| 94 | Energy Three, Inc. | Jackson, MS 39211 | Oil & Gas Operator | Jun 2025 |
| 95 | Equinox Oil Company | Plainville, KS 67663 | Oil & Gas Operator | Dec 2019 |
| 96 | F & M Oil Compan | | Oil & Gas Operator | Feb 1993 |
| 97 | F & M Oil Company Inc | Pettus, TX 78146 | Oil & Gas Operator | Oct 2025 |
| 98 | Falcon Explorati | | Oil & Gas Operator | Apr 1995 |
| 99 | Farmer, John O., Inc. | Russell, KS 67665 | Oil & Gas Operator | Jun 2025 |
| 100 | Four-Way Operating, Inc. | Great Bend, KS 67530 | Oil Operator | Sep 2013 |