| 101 | Dixon Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Sep 2023 |
| 102 | Downing-Nelson Oil Co Inc | Hays, KS 67601 | Oil & Gas Operator | Sep 2025 |
| 103 | Dreiling Oil Inc | Hays, KS 67601 | Oil Operator | Jun 2018 |
| 104 | E & B Natural Resources Management Corporation | Hays, KS 67601 | Oil & Gas Operator | Nov 2025 |
| 105 | Eagle River Energy Corporation | Broken Arrow, OK 74011 | Oil & Gas Operator | Oct 2025 |
| 106 | Edmiston Oil Com | | Oil & Gas Operator | May 1994 |
| 107 | Edmiston Oil Company, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 108 | Elevate Energy LTD | Aurora, CO 80016 | Oil & Gas Operator | Sep 2025 |
| 109 | Eleven Eleven Investments, LLC | Hays, KS 67601 | Oil Operator | Aug 2025 |
| 110 | Empire Energy E & P, LLC | Mayville, NY 14757 | Oil & Gas Operator | Mar 2019 |
| 111 | Energy Exploration & Production, Inc. | Wichita, KS 67201 | Oil Operator | Jan 2004 |
| 112 | Energy Reserves | | Oil & Gas Operator | Oct 1993 |
| 113 | Energy Reserves Group, Inc. | Wichita, KS 67202 | Oil & Gas Operator | May 2002 |
| 114 | Energy Three Inc. | Jackson, MS 39211 | Oil & Gas Operator | Sep 2025 |
| 115 | Enterprise Inc | Hays, KS 67601 | Oil Operator | Sep 2015 |
| 116 | Equinox Oil Comp | | Oil Operator | Dec 1996 |
| 117 | Evans Oil D W - | | Oil Operator | Mar 1992 |
| 118 | F & M Oil Compan | | Oil & Gas Operator | Feb 1993 |
| 119 | Farmer John O Inc | Russell, KS 67665 | Oil & Gas Operator | Sep 2025 |
| 120 | Farris Well Service | | Oil & Gas Operator | Dec 2021 |
| 121 | Fina Oil & Chemi | | Oil & Gas Operator | Oct 1995 |
| 122 | Fossil Energy, LLC | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 123 | Foster Oil LLC | | Oil Operator | Sep 2025 |
| 124 | Four-Way Oper In | | Oil Operator | Aug 1994 |
| 125 | Free State Petroleum | Hays, KS 67601 | Oil Operator | Jul 2021 |
| 126 | Fremont Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2004 |
| 127 | Frontier Oil Com | | Oil & Gas Operator | May 1995 |
| 128 | Frontier Oil Company | | Oil Operator | Oct 1999 |
| 129 | G L M Company | | Oil Operator | Sep 2025 |
| 130 | G-D Oil Oper - D | | Oil Operator | Apr 1990 |
| 131 | Garo Investment Company | Tempe, AZ 85284 | Oil Operator | Aug 2020 |
| 132 | Gene Karlin Company | | Oil Operator | Nov 2015 |
| 133 | Geodessa Corpora | | Oil Operator | Jul 1984 |
| 134 | Goby Energy, Inc. | Glenwood Springs, CO 81601 | Oil Operator | Dec 2019 |
| 135 | Gore Oil Company | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 136 | Graham-Michaelis | | Oil & Gas Operator | Nov 1996 |
| 137 | Graham-Michaelis Corporation | Wichita, KS 67201 | Oil & Gas Operator | Dec 2010 |
| 138 | Grand Mesa Operating Company | Wichita, KS 67206 | Oil & Gas Operator | Nov 2025 |
| 139 | Graves Drilling | | Oil & Gas Operator | Sep 1995 |
| 140 | Great Plains Energy, Inc. | Lincoln, NE 68516 | Oil & Gas Operator | Sep 2025 |
| 141 | Green J R & Jerr | | Oil Operator | Dec 1991 |
| 142 | Green, J. R. | Hays, KS 67601 | Oil Operator | Mar 2005 |
| 143 | Griggs Oil Incor | | Oil & Gas Operator | May 1994 |
| 144 | H & B Petroleum Corp. | Hutchinson, KS 67504 | Oil & Gas Operator | Sep 2025 |
| 145 | H & C Oil Operat | | Oil & Gas Operator | Dec 1996 |
| 146 | H & C Oil Operating Inc. | Plainville, KS 67663 | Oil & Gas Operator | Sep 2025 |
| 147 | H & H Oil Company, A General Partnership | Plainville, KS 67663 | Oil Operator | Feb 1997 |
| 148 | H & M Petroleum Corporation | Lincoln, NE 68516 | Oil & Gas Operator | Jun 2025 |
| 149 | H-5 Service | Plainville, KS 67663 | Oil Operator | May 1989 |
| 150 | Haas Petroleum LLC | Prairie VIllage, KS 66208 | Oil Operator | Sep 2025 |
| 151 | Habit Petroleum | | Oil Operator | Dec 2009 |
| 152 | Habit Petroleum, LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 153 | Hamlin Oil Opera | | Oil Operator | May 1988 |
| 154 | Hammerschmidt Wi | | Oil Operator | Sep 1991 |
| 155 | Hammerschmidt, Leo | Plainville, KS 67663 | Oil Operator | Aug 2000 |
| 156 | Hammerschmidt, William E | Plainville, KS 67663 | Oil Operator | Sep 2025 |
| 157 | Hansen Dane G TR | | Oil Operator | Feb 1995 |
| 158 | Hansen, Dane G. - Trust | Logan, KS 67646 | Oil Operator | Oct 2013 |
| 159 | Hellar Drilling | | Oil & Gas Operator | Jan 1994 |
| 160 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Sep 2025 |
| 161 | Herman L. Loeb LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Sep 2025 |
| 162 | Hertel Oil Company LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 163 | Hess Oil Company | McPherson, KS 67460 | Oil & Gas Operator | Sep 2025 |
| 164 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Sep 2025 |
| 165 | High Plains Oil | | Oil Operator | Jun 1989 |
| 166 | Hillenburg Oil Co., A General Partnership | Broken Arrow, OK 74011 | Oil Operator | Sep 2025 |
| 167 | Hoffman Resources LLC | Hoisington, KS 67544 | Oil & Gas Operator | Sep 2025 |
| 168 | Holt IVan Leroy | | Oil & Gas Operator | Jan 1994 |
| 169 | Horizontal Development & Production Inc | Lubbock, TX 79493 | Oil & Gas Operator | Jul 2002 |
| 170 | Hupfer Oil & Gas | Hays, KS 67601 | Oil & Gas Operator | Dec 1993 |
| 171 | Infinity Oil, Inc. | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 172 | Innes Petroleum | | Oil Operator | Nov 1994 |
| 173 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Oct 2025 |
| 174 | J-F Oil Company LLC | Hays, KS 67601 | Oil & Gas Operator | Dec 2002 |
| 175 | James P. Williams Enterprises, Inc. | Palco, KS 67657 | Oil Operator | Sep 2025 |
| 176 | Jason Oil Company, LLC | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 177 | Jaspar Co. | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 178 | Jay C. Boyer Oil | | Oil Operator | Nov 2009 |
| 179 | Jeff'S Oilwell Supervision | | Oil Operator | Jul 2025 |
| 180 | Jo-Allyn Oil Co Inc | Laverne, OK 73848 | Oil & Gas Operator | Nov 2025 |
| 181 | John O. Farmer, Inc. | | Oil & Gas Operator | Dec 1996 |
| 182 | Johnson Oil, A General Partnership | Phillipsburg, KS 67661 | Oil Operator | Sep 2025 |
| 183 | Kaiser-Francis O | | Oil & Gas Operator | Oct 1995 |
| 184 | Kaiser-Francis Oil | | Oil Operator | Nov 1995 |
| 185 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2025 |
| 186 | Kansas Crude Investments LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 187 | Karst, Elmer L | Russell, KS 67665 | Oil Operator | Feb 1990 |
| 188 | Kenny Brown Enterprises LLC | Hays, KS 67601 | Oil Operator | Jul 2013 |
| 189 | Kimbark Oil & Gas Company | Denver, CO 80203 | Oil & Gas Operator | May 2007 |
| 190 | Kiwanda Resc Inc | | Oil & Gas Operator | Aug 1993 |
| 191 | KLB Operating, Inc. | Plainville, KS 67663 | Oil Operator | Aug 2001 |
| 192 | Knighton Oil Company, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 193 | Kodiak Petroleum Inc | Englewood, CO 80155 | Oil & Gas Operator | Sep 2025 |
| 194 | Krueger, A. H., Jr. | Hays, KS 67601 | Oil Operator | Jul 1993 |
| 195 | Kykon Oil & Gas, Inc. | Billings, MT 59103 | Oil & Gas Operator | Jun 2007 |
| 196 | L-K Wireline, Inc. | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 197 | L. D. Drilling, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Sep 2025 |
| 198 | Landes, P. Todd, Jr. | Magnolia, AR 71753 | Oil Operator | Apr 1988 |
| 199 | Landmark Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Sep 2025 |
| 200 | Lansing Energy C | | Oil Operator | Jun 2006 |