| 1 | A. Francis Vonfeldt Co. | | Oil Operator | Nov 2019 |
| 2 | Aaron Oil Operations LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 3 | Abercrombie A L | | Oil & Gas Operator | Nov 1995 |
| 4 | Abercrombie Energy, LLC | Wichita, KS 67212 | Oil & Gas Operator | Sep 2025 |
| 5 | Abraxas Petroleu | | Oil Operator | May 1986 |
| 6 | Afg Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2009 |
| 7 | American Lariat | | Oil Operator | Jun 1994 |
| 8 | American Trad.&Prod. | | Oil Operator | Dec 1995 |
| 9 | American Trading | | Oil & Gas Operator | Dec 1995 |
| 10 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Oct 2025 |
| 11 | Amerkan Resource | | Oil Operator | Jan 1994 |
| 12 | Anchor Bay Petroleum LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 13 | Anderson Energy Inc | Wichita, KS 67278 | Oil & Gas Operator | Sep 2025 |
| 14 | Anderson Thornto | | Oil & Gas Operator | Mar 1995 |
| 15 | Angle Oil Compan | | Oil Operator | Jun 1994 |
| 16 | Angle Oil Company | Hays, KS 67601 | Oil Operator | Sep 2002 |
| 17 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 18 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 19 | Arcadian Resources LLC | Glen Elder, KS 67446 | Oil & Gas Operator | Dec 2025 |
| 20 | Argent Energy (Us) Holdings Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Sep 2021 |
| 21 | Argent Energy In | | Oil Operator | Feb 1994 |
| 22 | Argent Energy, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 23 | Arrow Oil Operat | | Oil Operator | Nov 1991 |
| 24 | Arroyo Petroleum | Wichita, KS 67205 | Oil Operator | Mar 2001 |
| 25 | Bach Oil Production | | Oil Operator | Sep 2025 |
| 26 | Bailey Boy Oil | | Oil Operator | Sep 2025 |
| 27 | Baird Oil Company Inc | Lewisville, TX 75067 | Oil & Gas Operator | Dec 2025 |
| 28 | Baird Oil Company LLC | Logan, KS 67646 | Oil Operator | Sep 2025 |
| 29 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Dec 2025 |
| 30 | Beacon Explorati | | Oil Operator | Apr 1987 |
| 31 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 32 | Berexco Incorpor | | Oil & Gas Operator | Dec 1996 |
| 33 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 34 | Big Horn Oil Co Inc | Great Bend, KS 67530 | Oil & Gas Operator | May 2013 |
| 35 | Bird Enterprises | | Oil Operator | Feb 2002 |
| 36 | Bison Energy Cor | | Oil & Gas Operator | Aug 1995 |
| 37 | Black Diamond Oi | | Oil Operator | Dec 1996 |
| 38 | Black Diamond Oil, Inc. | Hays, KS 67601 | Oil Operator | Apr 2019 |
| 39 | Blake Exploration, LLC | Bogue, KS 67625 | Oil Operator | Sep 2025 |
| 40 | Blueridge Petroleum Corporation | Edmond, OK 73003 | Oil & Gas Operator | Sep 2025 |
| 41 | Bowles, Jack | Edmond, OK 73083 | Oil Operator | Apr 2020 |
| 42 | Bowman Oil Compa | | Oil Operator | Feb 1994 |
| 43 | Bowman Oil Company, A General Partnership | Codell, KS 67663 | Oil Operator | Sep 2025 |
| 44 | Boyer Jay C | | Oil Operator | Feb 1994 |
| 45 | Braden-Deem Inco | | Oil & Gas Operator | Nov 1994 |
| 46 | Brehm Asset Management, LLC | Frisco, TX 75035 | Oil Operator | Aug 2025 |
| 47 | Brinker Enterprises, LLC | Glen Elder, KS 67446 | Oil Operator | Sep 2025 |
| 48 | Brougher Oil, Inc. | Wichita, KS 67212 | Oil & Gas Operator | Apr 2002 |
| 49 | Brown Gene Compa | | Oil Operator | Sep 1995 |
| 50 | Brown Kenny Ente | | Oil Operator | Jul 1995 |
| 51 | Brown VIola E. | Plainville, KS 67663 | Oil Operator | May 2014 |
| 52 | Brown, Gene Company | Plainville, KS 67663 | Oil Operator | May 1996 |
| 53 | Brown, Thomas M. (Deceased) | Plainville, KS 67663 | Oil Operator | May 2006 |
| 54 | Bruce Oil Company, LLC | McPherson, KS 67460 | Oil Operator | Sep 2025 |
| 55 | Brungardt Oil And Leasing Inc. | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 56 | C & R Oil | | Oil Operator | Sep 2025 |
| 57 | C C & S Oil Oper | | Oil Operator | Apr 1983 |
| 58 | Calvin Noah, LLC | Valley Center, KS 67147 | Oil Operator | Sep 2025 |
| 59 | Carmen Schmitt, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Sep 2025 |
| 60 | Castelli Exploration Inc | Oklahoma City, OK 73162 | Oil & Gas Operator | Oct 2025 |
| 61 | Castle Resources, Inc. | Russell, KS 67665 | Oil & Gas Operator | Sep 2025 |
| 62 | Cattlemans Oil O | | Oil Operator | Nov 1995 |
| 63 | Central Energy Corporation | Wichita, KS 67202 | Oil & Gas Operator | Nov 1998 |
| 64 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Nov 2025 |
| 65 | Chesney Marilyn | | Oil Operator | Jul 1987 |
| 66 | Chesney Oil Comp | | Oil Operator | Sep 1989 |
| 67 | Chevron U S A In | | Oil & Gas Operator | Sep 2000 |
| 68 | Christa Oil Comp | | Oil Operator | Nov 1994 |
| 69 | Cinco Exploratio | | Oil & Gas Operator | Jan 1988 |
| 70 | Cincris Energy C | | Oil & Gas Operator | Jun 1991 |
| 71 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Dec 2025 |
| 72 | Class Oil | Hays, KS 67601 | Oil Operator | Jun 1991 |
| 73 | Co-Co Incorporat | | Oil Operator | Oct 1989 |
| 74 | Coastal Oil & Ga | | Oil & Gas Operator | Oct 1996 |
| 75 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 76 | Collins John B | | Oil Operator | Sep 1994 |
| 77 | Columbia Petrole | | Oil Operator | Sep 1988 |
| 78 | Columbian Servic | | Oil & Gas Operator | Nov 1993 |
| 79 | Condor Energy | | Oil Operator | Aug 1995 |
| 80 | Condor Energy, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Oct 2021 |
| 81 | Conoco Incorpora | | Oil & Gas Operator | Apr 1988 |
| 82 | Continental Energy | Garden City, KS 67846-0918 | Oil & Gas Operator | Jul 2017 |
| 83 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Dec 2025 |
| 84 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Sep 2025 |
| 85 | Corwin B V | Enid, OK 73701 | Oil & Gas Operator | Apr 2017 |
| 86 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 87 | Crawford Oil & W | | Oil Operator | Dec 1985 |
| 88 | Crown Well Service Inc | Capon Bridge, WV 26711 | Oil Operator | Sep 2025 |
| 89 | Damar Resources, Inc. | Hays, KS 67601 | Oil & Gas Operator | Aug 2025 |
| 90 | Damson Oil Corpo | | Oil & Gas Operator | May 1994 |
| 91 | Darrah John J Jr | | Oil & Gas Operator | Oct 1994 |
| 92 | Darrah John Jay Jr | Wichita, KS 67201 | Oil & Gas Operator | Sep 2025 |
| 93 | Darrah Oil Company, LLC | Wichita, KS 67201 | Oil & Gas Operator | Dec 2025 |
| 94 | Davis Brothers O | | Oil Operator | Dec 1987 |
| 95 | Davis, Robert E. | Graham, TX 76450 | Oil & Gas Operator | Apr 1997 |
| 96 | Decab Company | Victoria, KS 67671 | Oil Operator | Aug 1996 |
| 97 | Denis Roberts Oil | | Oil Operator | Sep 2025 |
| 98 | DGH Oil, LLC | Logan, KS 67646 | Oil Operator | Sep 2025 |
| 99 | Diehl Oil Inc | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 100 | Discovery Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |