| 101 | Halliburton Oil | | Oil & Gas Operator | Sep 2008 |
| 102 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 103 | Hart Energies, LLC | Tulsa, OK 74133 | Oil & Gas Operator | Dec 2016 |
| 104 | Hartman Oil Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 105 | Hayes Oil & Gas LLC | Attica, KS 67009 | Oil & Gas Operator | Dec 2025 |
| 106 | Hellar Drilling | | Oil & Gas Operator | Jan 1994 |
| 107 | Herman L. Loeb LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Dec 2025 |
| 108 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Dec 2025 |
| 109 | Hinks Petroleum Co., Inc. | Wichita, KS 67201 | Oil Operator | May 1999 |
| 110 | Iuka-Carmi Development LLC | Pratt, KS 67124 | Oil & Gas Operator | Dec 2025 |
| 111 | Jay C. Boyer Oil | | Oil Operator | Nov 2009 |
| 112 | Jimenez Well Service, LLC | Kingman, KS 67068 | Oil Operator | Jan 2016 |
| 113 | Jody Oil & Gas Corporation | Attica, KS 67009 | Oil & Gas Operator | Dec 2025 |
| 114 | Jones G R Oil & | | Oil & Gas Operator | Nov 1993 |
| 115 | K & E Drilling I | | Oil & Gas Operator | Sep 1995 |
| 116 | K C Resources In | | Oil & Gas Operator | Oct 1993 |
| 117 | Kaiser-Francis O | | Oil & Gas Operator | Oct 1995 |
| 118 | Kaiser-Francis Oil | | Oil Operator | Nov 1995 |
| 119 | Kansas Bourse In | | Oil & Gas Operator | Apr 1985 |
| 120 | Kansas Petroleum, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jul 2007 |
| 121 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2026 |
| 122 | Keener Oil Compa | | Oil & Gas Operator | Jul 1988 |
| 123 | Keener Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2018 |
| 124 | Kirkman W L Inco | | Oil & Gas Operator | Dec 1994 |
| 125 | Klima Well Service, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Nov 2025 |
| 126 | Koehn, Max R. | Copeland, KS 67837 | Oil & Gas Operator | Oct 2019 |
| 127 | Kruckenberg & SC | | Oil & Gas Operator | Sep 1993 |
| 128 | Landmark Oil & G | | Oil Operator | Nov 1987 |
| 129 | Landowner | Honolulu, HI | Oil & Gas Operator | Dec 2008 |
| 130 | Lario Oil & Gas | | Oil & Gas Operator | Nov 1995 |
| 131 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Apr 2026 |
| 132 | Larson Operating | | Oil & Gas Operator | Mar 2001 |
| 133 | Lauck D R Oil Co | | Oil & Gas Operator | Oct 1995 |
| 134 | Leben Drilling I | | Oil & Gas Operator | Dec 1988 |
| 135 | Liedtke Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2022 |
| 136 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 137 | Loeb Herman L | | Oil & Gas Operator | Jan 1996 |
| 138 | M.T.M. Petroleum | | Oil & Gas Operator | Oct 1995 |
| 139 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | Feb 2026 |
| 140 | Mack Energy Comp | | Oil & Gas Operator | Nov 1994 |
| 141 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 142 | Marathon Oil Com | | Oil & Gas Operator | Dec 1996 |
| 143 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Feb 2026 |
| 144 | Martin Oil Produ | | Oil & Gas Operator | Dec 1994 |
| 145 | Martin Oil Producers, Inc. | Garland, TX 75046 | Oil & Gas Operator | Aug 2013 |
| 146 | McCoy Petroleum | | Oil & Gas Operator | Aug 1996 |
| 147 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | Feb 2026 |
| 148 | McGinness Energy Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Jan 2026 |
| 149 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2026 |
| 150 | Merit Energy Company, LLC | Dallas, TX 75009 | Oil & Gas Operator | Dec 2025 |
| 151 | Messenger Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Dec 2025 |
| 152 | Mid-Continent Energy Corp. | Wichita, KS 67208 | Oil & Gas Operator | Dec 2025 |
| 153 | Midco Exploration, Inc. | Westmont, IL 60559 | Oil & Gas Operator | Dec 2025 |
| 154 | Middle Bay Production Co. Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2014 |
| 155 | MKJ Oil Co LLC | Harper, KS 67058 | Oil & Gas Operator | Dec 2025 |
| 156 | Mobil Oil Corpor | | Oil & Gas Operator | Dec 1996 |
| 157 | Molitor Oil, Inc. | Wichita, KS 67205 | Oil & Gas Operator | Dec 2025 |
| 158 | Monsanto Oil Com | | Oil Operator | Nov 1996 |
| 159 | MTM Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Dec 2025 |
| 160 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Jan 2026 |
| 161 | Murfin Drilling Company, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Feb 2026 |
| 162 | Musgrove Energy Inc | Ponca City, OK 74602 | Oil & Gas Operator | Dec 2025 |
| 163 | National Coopera | | Oil & Gas Operator | Mar 1992 |
| 164 | National Cooperative Refinery Assoc. | Great Bend, KS 67530 | Oil & Gas Operator | Feb 2023 |
| 165 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 166 | Northstar Investments, Inc. | Wichita, KS 67230 | Oil & Gas Operator | Dec 2025 |
| 167 | Novy Oil & Gas, Inc. | Goddard, KS 67052 | Oil & Gas Operator | Feb 2026 |
| 168 | Ocean Energy Resources Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 169 | Oil Producers In | | Oil & Gas Operator | Dec 1996 |
| 170 | Oil Producers, Inc. Of Kansas | Wichita, KS 67206 | Oil & Gas Operator | Apr 2026 |
| 171 | Oil Prop Company | | Oil & Gas Operator | Sep 1995 |
| 172 | Oil Property Man | | Oil & Gas Operator | Jun 1995 |
| 173 | Oil Tech Producers Corporation | Moundridge, KS 67107 | Gas Operator | Dec 2025 |
| 174 | Oryx Energy Comp | | Oil & Gas Operator | Apr 1991 |
| 175 | Oxford Explorati | | Oil & Gas Operator | Mar 1993 |
| 176 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Apr 2026 |
| 177 | Panaco, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 178 | Parrish Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jan 2025 |
| 179 | Patton Oil Compa | | Oil & Gas Operator | Nov 1994 |
| 180 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 181 | Petroleum Incorp | | Oil & Gas Operator | Apr 1993 |
| 182 | Petroleum Manage | | Oil & Gas Operator | Oct 1994 |
| 183 | Petroleum Produc | | Oil & Gas Operator | Dec 1996 |
| 184 | Petroleum Production Management Inc | Shawnee Mission, KS 66202 | Oil & Gas Operator | Nov 2021 |
| 185 | Petroleum Proper | | Oil & Gas Operator | Nov 1995 |
| 186 | Petroleum Property Services, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Dec 2025 |
| 187 | Phillips Explora | | Oil & Gas Operator | Dec 1996 |
| 188 | Phillips Exploration Company L.C. | Andover, KS 67002 | Oil & Gas Operator | Dec 2025 |
| 189 | Phillips Lee Oil | | Oil & Gas Operator | Aug 1995 |
| 190 | Phillips Petrole | | Oil & Gas Operator | May 1995 |
| 191 | Pickrell Drilling Co., Inc. | Wichita, KS 67213 | Oil & Gas Operator | Dec 2025 |
| 192 | Pintail Petroleu | | Oil & Gas Operator | Dec 1995 |
| 193 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 194 | Pioneer Exploration Company | Houston, TX 77090 | Oil & Gas Operator | Feb 2026 |
| 195 | Pioneer Exploration, LLC | Houston, TX 77090 | Oil & Gas Operator | Dec 2025 |
| 196 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | Dec 2025 |
| 197 | Plano Petroleum Corporation | McKinney, TX 75070 | Oil & Gas Operator | Dec 2019 |
| 198 | Pratt Well Service, Inc. | Pratt, KS 67124 | Oil & Gas Operator | Dec 2025 |
| 199 | Questar Exploration And Production Company Division Of Questar Urc Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2023 |
| 200 | R & B Oil & Gas Inc | Attica, KS 67009 | Oil & Gas Operator | Dec 2025 |