| 101 | Larson Operating Company | Olmitz, KS 67564-8561 | Oil & Gas Operator | Dec 2019 |
| 102 | Lauck D R Oil Co | | Oil & Gas Operator | Oct 1995 |
| 103 | Lawson Petroleum Co. | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2009 |
| 104 | Lebsack Oil Production Inc. | Stafford, KS 67578 | Oil & Gas Operator | Sep 2025 |
| 105 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 106 | Lowry Exploration Inc | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2025 |
| 107 | Mako Operating Company, LLC | Andover, KS 67002 | Gas Operator | May 2002 |
| 108 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 109 | Marden Producing | | Gas Operator | Aug 1990 |
| 110 | Marden Producing Company | Edmond, OK 73083 | Gas Operator | Sep 2025 |
| 111 | Marexco | | Oil & Gas Operator | Nov 1994 |
| 112 | Marexco, Inc. | Castle Rock, CO 80104 | Oil & Gas Operator | Sep 2025 |
| 113 | McCoy Petroleum | | Oil & Gas Operator | Aug 1996 |
| 114 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | Dec 2025 |
| 115 | McKelvy A D Oil | | Gas Operator | Feb 1995 |
| 116 | Medicine Bow Operating Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2014 |
| 117 | Merit Energy Company, LLC | Dallas, TX 75009 | Oil & Gas Operator | Sep 2025 |
| 118 | Mid Continent Resources, Inc. | Houston, TX 77060 | Oil & Gas Operator | Feb 2026 |
| 119 | Mid-Continent Energy Corp. | Wichita, KS 67208 | Oil & Gas Operator | Sep 2025 |
| 120 | Mid-Continent Energy, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2020 |
| 121 | Mobil Oil Corpor | | Oil & Gas Operator | Dec 1996 |
| 122 | Murfin Drilling Company, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Dec 2025 |
| 123 | Mustang Drilling | | Oil & Gas Operator | Nov 1996 |
| 124 | Natural Gas Anadarko Company | Perryton, TX 79070 | Oil & Gas Operator | Feb 2026 |
| 125 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Feb 2026 |
| 126 | Norstar Petroleum Inc | Englewood, CO 80112 | Oil & Gas Operator | Sep 2025 |
| 127 | North American Resources Company | Billings, MT 59101 | Oil & Gas Operator | Dec 2019 |
| 128 | Northern Pump Company | Denver, CO 80202-3130 | Oil & Gas Operator | Feb 2006 |
| 129 | Oil Producers, Inc. Of Kansas | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 130 | Osborn Heirs Company LTD | San Antonio, TX 78217 | Oil & Gas Operator | Sep 2025 |
| 131 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Feb 2026 |
| 132 | Palmer Oil, Inc. | Garden City, KS 67846 | Oil & Gas Operator | Sep 2025 |
| 133 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Feb 2026 |
| 134 | Parker & Parsley | | Oil & Gas Operator | Dec 1996 |
| 135 | Pennzenergy Exploration And Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2009 |
| 136 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
| 137 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 138 | Petroleum Produc | | Oil & Gas Operator | Dec 1996 |
| 139 | Petroleum Production Management Inc | Shawnee Mission, KS 66202 | Oil & Gas Operator | Nov 2021 |
| 140 | Petroleum Technologies, Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Sep 2025 |
| 141 | Petrosantander (USA) Inc. | Houston, TX 77057 | Oil & Gas Operator | Sep 2025 |
| 142 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 143 | Pioneer Exploration Company | Houston, TX 77090 | Oil & Gas Operator | Dec 2025 |
| 144 | Pioneer Oil Company, Inc. | Vincennes, IN 47501 | Oil & Gas Operator | Sep 2025 |
| 145 | Plains Petroleum | | Gas Operator | Dec 1996 |
| 146 | Presco Western LLC | Houston, TX 77046 | Oil & Gas Operator | Sep 2025 |
| 147 | PT Oil LLC | Osage City, KS 66523 | Oil & Gas Operator | Jul 2025 |
| 148 | Rama Operating Company Inc | Stafford, KS 67578 | Oil & Gas Operator | Dec 2025 |
| 149 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2026 |
| 150 | Renegade Resources Corp. | Reno, NV 89511 | Oil & Gas Operator | Jul 2024 |
| 151 | Renick Energy, L.C. | Cimarron, KS 67835 | Gas Operator | Apr 2016 |
| 152 | Rincon Oil & Gas LLC | Arvada, CO 80005 | Gas Operator | Jun 2022 |
| 153 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Sep 2025 |
| 154 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 155 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 156 | Russell Gas Co., LLC | Hugoton, KS 67451 | Gas Operator | Sep 2025 |
| 157 | Samuel Gary Jr. & Associates, Inc. | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 158 | San Marco Petroleum Inc | Denver, CO 80293 | Oil & Gas Operator | Dec 2025 |
| 159 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Feb 2026 |
| 160 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 161 | Secure Exploration And Production, LLC | | Oil Operator | Aug 2025 |
| 162 | Sharon Resources | | Oil Operator | Sep 1995 |
| 163 | Sharon Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Aug 2010 |
| 164 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
| 165 | Spess Oil Company, A General Partnership | Cleveland, OK 74020 | Oil & Gas Operator | Sep 2025 |
| 166 | Spikes Gas & Oil | | Gas Operator | Mar 1994 |
| 167 | Spikes, Gary E. | Garden City, KS 67846 | Gas Operator | Mar 2013 |
| 168 | St Johns Operating #1 LP | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 169 | Stelbar Oil Corporation, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 170 | Sunflower Exploration, LLC | Overland Park, KS 66210 | Gas Operator | Sep 2025 |
| 171 | Te-Ray Energy Inc | Oklahoma City, OK 73108 | Oil & Gas Operator | Nov 2025 |
| 172 | Texaco Explorati | | Oil & Gas Operator | Dec 1996 |
| 173 | TGT Petroleum Co | | Oil & Gas Operator | Apr 1995 |
| 174 | Thoroughbred Associates LLC | Wichita, KS 67226 | Oil & Gas Operator | Sep 2025 |
| 175 | Thunderbird Dril | | Oil & Gas Operator | Nov 1995 |
| 176 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | Dec 2025 |
| 177 | Trinity Bay Oil & Gas, Inc. | Lubbock, TX 79416 | Oil & Gas Operator | Feb 2026 |
| 178 | Union Pacific Re | | Oil & Gas Operator | Dec 1996 |
| 179 | Union Pacific Resour | | Oil & Gas Operator | Apr 2002 |
| 180 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2023 |
| 181 | Vess Oil Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 182 | Wallace Oil & Gas Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Feb 2026 |
| 183 | Werner Roland L | | Gas Operator | Nov 1992 |
| 184 | Western Plains Resources LLC | Garden City, KS 67846 | Oil & Gas Operator | Sep 2025 |
| 185 | Whitco Petroleum, LP | Leoti, KS 67861 | Oil & Gas Operator | Sep 2025 |
| 186 | White Exploration Inc | Wichita, KS 67278 | Oil & Gas Operator | Sep 2025 |
| 187 | Williams, M. A. | Houston, TX 77263 | Gas Operator | Feb 2025 |
| 188 | Woolsey Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 189 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 190 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 191 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Feb 2026 |
| 192 | Yucca Petroleum | | Gas Operator | Jan 1994 |
| 193 | Zenith Drilling | | Oil & Gas Operator | Aug 1995 |
| 194 | Zenith Drilling Corporation | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |