| 101 | Lario Oil & Gas | | Oil & Gas Operator | Nov 1995 |
| 102 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Dec 2025 |
| 103 | Lasso Energy LLC | Chase, KS 67524 | Oil & Gas Operator | Sep 2025 |
| 104 | Leis, Ryan M. | Scottsdale, AZ 85258 | Oil & Gas Operator | Dec 2009 |
| 105 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 106 | Little River Energy Company | Drumright, OK 74030 | Oil & Gas Operator | Nov 2025 |
| 107 | M & M Exploration Inc | Westminster, CO 80031 | Oil & Gas Operator | Nov 2025 |
| 108 | M E Klein & Associates, Inc. | Norman, OK 73070 | Oil & Gas Operator | Sep 2025 |
| 109 | M M Energy Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2025 |
| 110 | M.T.M. Petroleum | | Oil & Gas Operator | Oct 1995 |
| 111 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Nov 2025 |
| 112 | Marathon Oil Com | | Oil & Gas Operator | Dec 1996 |
| 113 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Nov 2025 |
| 114 | McCoy Petroleum | | Oil & Gas Operator | Aug 1996 |
| 115 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | Nov 2025 |
| 116 | McGinness Oil Co | Wichita, KS 67202 | Oil & Gas Operator | Dec 2019 |
| 117 | Messenger Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Sep 2025 |
| 118 | Metro Energy Group, Inc. | Bossier City, LA 71112 | Oil & Gas Operator | May 2013 |
| 119 | Mid America Ener | | Oil Operator | Nov 1993 |
| 120 | Mid-America Energy Company, Inc. | Lebanon, MO 65536 | Oil Operator | Jul 2003 |
| 121 | Mid-Continent En | | Oil & Gas Operator | Nov 1995 |
| 122 | Middle Bay Production Co. Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2014 |
| 123 | Mike Kelso Oil, Inc. | Chase, KS 67524 | Oil & Gas Operator | Sep 2025 |
| 124 | Mobil Oil Corpor | | Oil & Gas Operator | Dec 1996 |
| 125 | Molz Oil Company Inc | Kiowa, KS 67070 | Oil & Gas Operator | Nov 2025 |
| 126 | MTM Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Sep 2025 |
| 127 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 128 | Murfin Drilling | | Oil & Gas Operator | Jul 1997 |
| 129 | Murfin Drilling Company, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Nov 2025 |
| 130 | N-10 Exploration, LLC | Attica, KS 67009 | Oil & Gas Operator | Sep 2025 |
| 131 | National Oil Com | | Oil & Gas Operator | Oct 1992 |
| 132 | Nicholas Water Service, Inc. | Zenda, KS 67159 | Oil Operator | Mar 2006 |
| 133 | Njre Operating Company | Tulsa, OK 74119 | Gas Operator | Dec 2016 |
| 134 | Novy Oil & Gas, Inc. | Goddard, KS 67052 | Oil & Gas Operator | Dec 2025 |
| 135 | NPF Energy Corporation | Boise, ID 83708 | Oil & Gas Operator | Sep 2025 |
| 136 | Oil Producers, Inc. Of Kansas | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 137 | Oil Property Man | | Oil & Gas Operator | Jun 1995 |
| 138 | Oil Property Management Inc | Attica, KS 67009 | Oil & Gas Operator | Feb 2021 |
| 139 | Okmar Oil Compan | | Oil & Gas Operator | Feb 1995 |
| 140 | Okmar Oil Company | Marietta, OH 45750 | Oil & Gas Operator | Jun 2005 |
| 141 | Onshore, L.L.C. | Wichita, KS 67205 | Oil & Gas Operator | Dec 2009 |
| 142 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 143 | Palomino Petrole | | Oil & Gas Operator | Dec 1995 |
| 144 | Pancanadian Petr | | Oil Operator | Aug 1990 |
| 145 | Patton Oil Compa | | Oil & Gas Operator | Nov 1994 |
| 146 | Petro Locators I | | Oil & Gas Operator | Dec 1995 |
| 147 | Petroleum Energy | | Oil & Gas Operator | Mar 1991 |
| 148 | Petroleum Incorp | | Oil & Gas Operator | Apr 1993 |
| 149 | Petroleum Property Services, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 150 | Phillips Petrole | | Oil & Gas Operator | May 1995 |
| 151 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 152 | Pickrell Drilling Co., Inc. | Wichita, KS 67213 | Oil & Gas Operator | Sep 2025 |
| 153 | Pike Oil & Gas Inc | Pittsfield, IL 62363 | Oil & Gas Operator | Oct 2020 |
| 154 | Pintail Petroleu | | Oil & Gas Operator | Dec 1995 |
| 155 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 156 | Pioneer Exploration, LLC | Houston, TX 77090 | Oil & Gas Operator | Nov 2025 |
| 157 | Primexx Operating Corporation | Dallas, TX 75206 | Oil & Gas Operator | Mar 2024 |
| 158 | Quinque Operating Company | Liberal, KS 67905 | Oil & Gas Operator | Sep 2025 |
| 159 | Quivira Gas Comp | | Gas Operator | Mar 1990 |
| 160 | R & B Oil & Gas | | Oil & Gas Operator | Jul 1995 |
| 161 | R & B Oil & Gas Inc | Attica, KS 67009 | Oil & Gas Operator | Sep 2025 |
| 162 | Rains & Williams | | Oil & Gas Operator | Nov 1995 |
| 163 | Ram Petroleum Corporation | Wichita, KS 67202 | Gas Operator | Sep 2025 |
| 164 | Ramoil Company | Winfield, KS 67156 | Oil & Gas Operator | May 1987 |
| 165 | Raney Oil Company | Lawrence, KS 66047 | Oil & Gas Operator | May 1999 |
| 166 | Reach Group-Reac | | Oil & Gas Operator | Apr 1995 |
| 167 | Reach Petroleum | | Oil & Gas Operator | Jan 1994 |
| 168 | Resource Venture | | Oil & Gas Operator | Oct 1991 |
| 169 | Rice Engineering Corporation | Great Bend, KS 67530 | Oil & Gas Operator | Feb 2023 |
| 170 | Richardson J Mar | | Oil & Gas Operator | Apr 1995 |
| 171 | Rine Exploration | | Oil & Gas Operator | Jul 1994 |
| 172 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2025 |
| 173 | Robinowitz Oil Company, A General Partnership | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2023 |
| 174 | Robinson Energy & Exploration, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Aug 2008 |
| 175 | Robinson Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 176 | Robinson Oil Com | | Oil & Gas Operator | Feb 1995 |
| 177 | Samson Properties, Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2008 |
| 178 | Samson Resources | | Oil Operator | Jan 1994 |
| 179 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Dec 2025 |
| 180 | Schierling Eldon | | Oil & Gas Operator | Aug 1986 |
| 181 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 182 | Shaffer Oil Co., Inc. | Burlington, KS 66839 | Oil & Gas Operator | Jul 2001 |
| 183 | Sho-Bar Energy I | | Oil & Gas Operator | Jan 1991 |
| 184 | Sho-Bar Energy Inc | Harper, KS 67058 | Oil & Gas Operator | Oct 2025 |
| 185 | Shofner Oil Company | Chushing,, OK 74023 | Oil & Gas Operator | Feb 2003 |
| 186 | Sokan Operating, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Sep 2025 |
| 187 | Source Petroleum | Wichita, KS 67202 | Oil & Gas Operator | Oct 1993 |
| 188 | SPS, Inc. | Cheney, KS 67025 | Oil & Gas Operator | Sep 2025 |
| 189 | Standard Operating Company | Wichita, KS 67205 | Oil & Gas Operator | Dec 2019 |
| 190 | Stelbar Oil Corp | Wichita, KS 67206 | Oil & Gas Operator | Aug 1995 |
| 191 | Stelbar Oil Corporation, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 192 | Stone Oil Compan | | Oil Operator | Jan 1990 |
| 193 | Stratakan Exploration, LLC | Plainville, KS 67663 | Oil & Gas Operator | Sep 2025 |
| 194 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Nov 2025 |
| 195 | Texaco Explorati | | Oil & Gas Operator | Dec 1996 |
| 196 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 197 | Texas Energies I | | Oil & Gas Operator | Aug 1994 |
| 198 | Texas Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Aug 1998 |
| 199 | Texas/Arkansas P | | Oil & Gas Operator | Sep 1990 |
| 200 | Tomlinson Operating, LLC | Ketchum, ID 83340 | Oil & Gas Operator | Oct 2014 |