| 1 | Abercrombie A L | | Oil & Gas Operator | Nov 1995 |
| 2 | Abercrombie Dril | | Oil Operator | Jan 1990 |
| 3 | Abercrombie Energy, LLC | Wichita, KS 67212 | Oil & Gas Operator | Mar 2025 |
| 4 | Adeco, Inc. | Hays, KS 67601 | Oil Operator | Mar 2025 |
| 5 | Alb, Inc. | Great Bend, KS 67530 | Oil Operator | Mar 2025 |
| 6 | Allen Drilling Company | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2009 |
| 7 | Alpine Drilling | | Oil & Gas Operator | May 1994 |
| 8 | Alpine Petroleum | Abilene, TX 79608 | Oil & Gas Operator | Jul 2018 |
| 9 | American Energie | | Oil & Gas Operator | May 1995 |
| 10 | American Petrole | | Oil & Gas Operator | Dec 1996 |
| 11 | American Warrior | | Oil & Gas Operator | Mar 2025 |
| 12 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Apr 2025 |
| 13 | Anderson Energy, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Dec 2024 |
| 14 | Anderson, Jerry | Floydada, TX 79235 | Oil & Gas Operator | Mar 2025 |
| 15 | Antares Oil Corp | Denver, CO 80202 | Oil & Gas Operator | Oct 2015 |
| 16 | Apache Drilling | | Oil Operator | Sep 1994 |
| 17 | Apache Drilling Co | Kingman, KS 67068 | Oil Operator | Feb 2006 |
| 18 | Apollo Energies | Pratt, KS 67124 | Oil Operator | Aug 2016 |
| 19 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | May 2025 |
| 20 | Argent Energy In | | Oil Operator | Feb 1994 |
| 21 | Argent Energy, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 22 | Arp Operating, LLC | Denver, CO 80202 | Oil Operator | Mar 2025 |
| 23 | Bankoff Oil Comp | | Oil Operator | Jun 1995 |
| 24 | Bankoff Oil Company | Tulsa, OK 74170 | Oil Operator | Sep 2003 |
| 25 | Barco Energy, Inc. | Great Bend, KS 67530 | Oil Operator | Jun 2001 |
| 26 | Barfield Oil Cor | | Oil Operator | Oct 1995 |
| 27 | Barracuda Operating Company | Ness City, KS 67560 | Oil Operator | Mar 2025 |
| 28 | Becker Oil Corporation | Ponca City, OK 74602 | Oil & Gas Operator | Apr 2025 |
| 29 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 30 | Beren Corporatio | | Oil & Gas Operator | Dec 1995 |
| 31 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Jul 2025 |
| 32 | Berexco Incorpor | | Oil & Gas Operator | Dec 1996 |
| 33 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Jul 2025 |
| 34 | Big Horn Oil Co., Inc. | Great Bend, KS 67530 | Oil & Gas Operator | May 2013 |
| 35 | Biggy'S Petroleum | | Oil & Gas Operator | Dec 2024 |
| 36 | Black Diamond Oi | | Oil Operator | Dec 1996 |
| 37 | Black Diamond Oil, Inc. | Hays, KS 67601 | Oil Operator | Apr 2019 |
| 38 | Black Oak Exploration, LLC | Denver, CO 80210 | Oil & Gas Operator | Mar 2025 |
| 39 | Blueridge Petroleum Corporation | Edmond, OK 73003 | Oil & Gas Operator | Mar 2025 |
| 40 | Bowen Oil & Expl | | Oil & Gas Operator | Apr 1993 |
| 41 | Bowie Oil LLC | | Oil Operator | Mar 2025 |
| 42 | BP Exploration I | | Oil & Gas Operator | Oct 1994 |
| 43 | Braden-Deem Inco | | Oil & Gas Operator | Nov 1994 |
| 44 | Brehm Asset Management, LLC | Frisco, TX 75035 | Oil Operator | Mar 2025 |
| 45 | Brito Oil Co., Inc | Wichita, KS 67201 | Oil & Gas Operator | Dec 2009 |
| 46 | Buried Hills Prod. Co., Inc. | Midvale, UT 84047 | Oil Operator | Dec 2006 |
| 47 | C & R Drilling C | | Oil Operator | Aug 1994 |
| 48 | C K Oil Company | Great Bend, KS 67530 | Oil & Gas Operator | Mar 2025 |
| 49 | Cambria Corporation | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2019 |
| 50 | Cambron, Paul L. | Ness City, KS 67560 | Oil & Gas Operator | Dec 2019 |
| 51 | Canaday Oil Corp | Goddard, KS 67052 | Oil & Gas Operator | Mar 2025 |
| 52 | Carmen Schmitt, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Mar 2025 |
| 53 | Castle Resources | | Oil Operator | Jul 2002 |
| 54 | Castle Resources, Inc. | Russell, KS 67665 | Oil & Gas Operator | Mar 2025 |
| 55 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Jul 2025 |
| 56 | Chevron U S A In | | Oil & Gas Operator | Sep 2000 |
| 57 | Cheyenne Oil Services, Inc. | Ness City, KS 67560 | Oil Operator | Nov 2023 |
| 58 | Chief Drilling C | | Oil & Gas Operator | Feb 1995 |
| 59 | Cholla Production LLC | Littleton, CO 80127 | Oil & Gas Operator | Mar 2025 |
| 60 | Cholla Resources | | Oil Operator | Oct 1995 |
| 61 | Cholla Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jan 1997 |
| 62 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Jul 2025 |
| 63 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Mar 2025 |
| 64 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 65 | Col-Kan Developm | | Oil & Gas Operator | Jan 1995 |
| 66 | Condor Energy | | Oil Operator | Aug 1995 |
| 67 | Condor Energy Inc | Great Bend, KS 67530 | Oil & Gas Operator | Oct 2021 |
| 68 | Continental Oil | | Oil Operator | Jun 1985 |
| 69 | Coral Coast Petroleum, L.C. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 70 | Cross Timbers Op | | Oil & Gas Operator | Nov 1996 |
| 71 | Curt'S Oil Operation, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Mar 2025 |
| 72 | D K Oil Services LLC | Wellsville, KS 66092 | Oil Operator | Nov 2019 |
| 73 | D Oil, Inc. | Victoria, KS 67671 | Oil Operator | Mar 2025 |
| 74 | Damar Resc Incor | | Oil Operator | Oct 1995 |
| 75 | Damar Resources, Inc. | Hays, KS 67601 | Oil & Gas Operator | Oct 2023 |
| 76 | Darrah John J Jr | | Oil & Gas Operator | Oct 1994 |
| 77 | Darrah John Jay Jr | Wichita, KS 67201 | Oil & Gas Operator | Apr 2025 |
| 78 | Darrah Oil Company LLC | Wichita, KS 67201 | Oil & Gas Operator | Jul 2025 |
| 79 | Davis Petroleum | | Oil & Gas Operator | Dec 1996 |
| 80 | Davis Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Aug 2021 |
| 81 | Daystar Petroleum, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Mar 2025 |
| 82 | Derrick-Amer Oil | | Oil Operator | Dec 1991 |
| 83 | Deutsch Oil Company | | Oil & Gas Operator | Mar 2025 |
| 84 | DGH Oil, LLC | Logan, KS 67646 | Oil Operator | Mar 2025 |
| 85 | DK Operating Inc. | Jetmore, KS 67854 | Oil Operator | Jan 2025 |
| 86 | Double Eagle Exp | | Oil Operator | Jul 1992 |
| 87 | Double Eagle Exploration Inc | Windthorst, TX 76389 | Oil Operator | Mar 2025 |
| 88 | Downing-Nelson Oil Co Inc | Hays, KS 67601 | Oil & Gas Operator | Mar 2025 |
| 89 | Eagle Creek Corporation | Andover, KS 67002 | Oil & Gas Operator | Mar 2025 |
| 90 | Elevate Energy LTD | Aurora, CO 80016 | Oil & Gas Operator | Mar 2025 |
| 91 | Encorp, Inc. | Wichita, KS 67206 | Oil Operator | May 2007 |
| 92 | Energy Reserves | | Oil & Gas Operator | Oct 1993 |
| 93 | Ensign Oil & Gas Inc. | | Oil & Gas Operator | Jul 1993 |
| 94 | Equinox Oil Comp | | Oil Operator | Dec 1996 |
| 95 | Equinox Oil Company | Plainville, KS 67663 | Oil & Gas Operator | Dec 2019 |
| 96 | F.G. Holl Co., LLC | Wichita, KS 67206 | Oil & Gas Operator | Mar 2025 |
| 97 | Falcon Explorati | | Oil & Gas Operator | Apr 1995 |
| 98 | Falcon Exploration | | Oil Operator | Dec 1994 |
| 99 | Falcon Exploration, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Mar 2025 |
| 100 | Farmer, John O., Inc. | Russell, KS 67665 | Oil & Gas Operator | Mar 2025 |