| 1 | Admiral Bay (USA) Inc. | Centennial, CO 80112 | Gas Operator | Jun 2011 |
| 2 | Adr Operating, Inc. | Independence, KS 67301 | Oil & Gas Operator | Sep 2013 |
| 3 | Arena Resources Inc | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 4 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2026 |
| 5 | Bert Carlson | Yates Center, KS 66783 | Gas Operator | Sep 2009 |
| 6 | Biron Incorporat | | Oil Operator | Aug 1989 |
| 7 | Brecheisen & Lor | | Oil & Gas Operator | Oct 1995 |
| 8 | Brecheisen & Spooner | Garnett, KS 66032 | Gas Operator | Aug 2009 |
| 9 | Brecheisen Oil C | | Oil & Gas Operator | Sep 1993 |
| 10 | Brecheisen Oil Co. | Garnett, KS 66032 | Oil & Gas Operator | Oct 1999 |
| 11 | Butler, Harold F. | Independence, KS 67301 | Oil Operator | Sep 2002 |
| 12 | C N B Enterprises | Yates Center, KS 66783 | Oil & Gas Operator | Jan 2009 |
| 13 | Carroll Energy, LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Nov 2023 |
| 14 | Central States O | | Oil & Gas Operator | May 1992 |
| 15 | Central States Oil And Gas Co. | Cherryvale, KS 67335 | Gas Operator | Feb 2005 |
| 16 | Colt Energy Inc | Iola, KS 66749 | Oil & Gas Operator | Sep 2025 |
| 17 | Davis Drilling & | | Oil Operator | Jul 1989 |
| 18 | Donna Lee Oil Co | Independence, KS 67301 | Oil & Gas Operator | Apr 2014 |
| 19 | Double 7 Oil And Gas LLC | Parsons, KS 67357 | Oil & Gas Operator | Sep 2009 |
| 20 | Double Eagle Resources, LLC | FT Smith, AR 72901 | Oil & Gas Operator | Sep 2009 |
| 21 | Eagle Exploratio | | Oil & Gas Operator | Oct 1991 |
| 22 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Nov 2025 |
| 23 | Entransco Energy LLC | Dewey, OK 74029 | Oil & Gas Operator | Oct 2024 |
| 24 | Exodus Gas & Oil LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2024 |
| 25 | Fastrak Energy, LLC | Cherryvale, KS 67335 | Oil & Gas Operator | Sep 2025 |
| 26 | Foster Gas Corporation | Brownwood, TX 76801 | Oil & Gas Operator | Jan 2009 |
| 27 | Grant Stan & Kru | | Oil Operator | Apr 1985 |
| 28 | Guardian Energy Cons | | Gas Operator | Sep 2009 |
| 29 | Guardian Energy Consultants, Inc. | Tulsa, OK 74120 | Gas Operator | Sep 2009 |
| 30 | H & S Oil Co., LLC | Cherryvale, KS 67335 | Oil Operator | Oct 2024 |
| 31 | Kanmap Incorpora | | Oil & Gas Operator | Dec 1995 |
| 32 | Kephart Drilling | | Gas Operator | Aug 1991 |
| 33 | Layne Energy Operating, LLC | Kansas City, KS 66106 | Oil & Gas Operator | Feb 2025 |
| 34 | Legend Energy LLC | Cherryvale, KS 67335 | Oil Operator | Aug 2025 |
| 35 | Lobo Production, Inc | Goodland, KS 67735 | Gas Operator | Sep 2025 |
| 36 | Lorenz, James D. | Parsons, KS 67357 | Oil & Gas Operator | May 2014 |
| 37 | LR Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2025 |
| 38 | M.C.E. Trust Group, A General Partnership | Cherryvale, KS 67335 | Oil & Gas Operator | Sep 2009 |
| 39 | Merit Energy Company, LLC | Dallas, TX 75009 | Oil & Gas Operator | Sep 2025 |
| 40 | Merrick Oil & Gas | | Oil & Gas Operator | Sep 2025 |
| 41 | Murk, James M. | Wheaton, IL 60189 | Gas Operator | Jan 1999 |
| 42 | Myers, Bobby | Cherryvale, KS 67335 | Oil & Gas Operator | Jun 2020 |
| 43 | Nacogdoches Oil & Gas, LLC | Nacogdoches, TX 75961 | Oil & Gas Operator | Dec 2017 |
| 44 | New Donna Lee Oil Company | Bakersfield, CA 93308 | Oil & Gas Operator | Jul 2025 |
| 45 | Oswego Oil & Gas | | Oil & Gas Operator | Jun 1984 |
| 46 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Feb 2026 |
| 47 | Peak Energy LLC | Coffeyville, KS 67337 | Oil & Gas Operator | Sep 2025 |
| 48 | Petro 85 Incorpo | | Oil Operator | Mar 1993 |
| 49 | Postrock Midcontinent Production LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Nov 2025 |
| 50 | Potato Creek, L.L.C. | Edna, KS 67342 | Oil & Gas Operator | Sep 2025 |
| 51 | Quest Cherokee LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 52 | RCR Drilling & P | | Oil & Gas Operator | Apr 1992 |
| 53 | Redbud Oil & Gas Operating, LLC | Spring, TX 77379 | Oil & Gas Operator | Sep 2025 |
| 54 | Reese Exploratio | | Oil & Gas Operator | Mar 1995 |
| 55 | RH Capital-Beets, LLC | Jefferson City, MO 65101 | Oil Operator | Sep 2025 |
| 56 | River Rock Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 57 | RJ Energy, LLC | Garnett, KS 66032 | Oil Operator | Sep 2025 |
| 58 | Sandefer Larry | | Oil Operator | Aug 1993 |
| 59 | Saye, Doyal A. | Dennis, KS 67341 | Gas Operator | Aug 2016 |
| 60 | Sek Energy, LLC | Benedict, KS 66714 | Oil & Gas Operator | Sep 2025 |
| 61 | Seminole Senora Sand Unit #1, LLC | Rogers, AR 72758 | Gas Operator | Sep 2010 |
| 62 | Simmons Robert Z | | Oil Operator | Dec 1990 |
| 63 | Sirius Energy Corp. | Abilene, TX 79606 | Oil Operator | Dec 2009 |
| 64 | Smith, Loren L. | Oswego, KS 67356 | Oil & Gas Operator | Sep 2009 |
| 65 | Sotta, Donald E. | McCune, KS 66753 | Oil Operator | Jul 2025 |
| 66 | Springer Benjami | | Gas Operator | Aug 1990 |
| 67 | STP Cherokee Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2014 |
| 68 | Stroud Oil Properties, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | May 2013 |
| 69 | Tec Resources LLC | Tulsa, OK 74128 | Oil & Gas Operator | May 2013 |
| 70 | Triad Drilling C | | Oil & Gas Operator | Nov 1988 |
| 71 | Triple C Petroleum LLC | Colony, KS 66015 | Oil Operator | Nov 2019 |
| 72 | Triple T Pipelines, Inc. | Frontenac, KS 66763 | Oil & Gas Operator | Sep 2023 |
| 73 | Triple-T Pipelin | | Oil & Gas Operator | Oct 1995 |
| 74 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2023 |
| 75 | V W & B Drilling Co. | Cherryvale, KS 67335 | Gas Operator | Feb 1998 |
| 76 | Wells-Battelstei | | Oil & Gas Operator | Mar 1993 |
| 77 | Woolsey Operating Company, LLC | Wichita, KS 67226 | Oil & Gas Operator | Sep 2025 |
| 78 | Yocham Oil Company | | Oil Operator | Sep 2025 |
| 79 | Zeiders Bros. Oil & Gas Company, L.L.C. | Edmond, OK 73003 | Oil & Gas Operator | Nov 2025 |