| 101 | M & C Oil Incorp | | Oil Operator | Mar 1995 |
| 102 | M-J Oil Company Inc. | Minerva, OH 44657 | Oil & Gas Operator | Dec 2008 |
| 103 | M. J. T. Enterprises | | Oil Operator | Mar 2026 |
| 104 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | May 2026 |
| 105 | Maxam Incorporat | | Oil Operator | Jun 1991 |
| 106 | McCluskey Willia | | Oil & Gas Operator | Dec 1990 |
| 107 | McMullin, Douglas | Wellsville, KS 66092 | Oil Operator | Nov 2025 |
| 108 | McQueeney, John J. | Osawatomie, KS 66064 | Oil Operator | Jan 1985 |
| 109 | Mid States Energ | | Oil Operator | Aug 1985 |
| 110 | Midwest Oil, LLC | Destin, FL 32541 | Oil Operator | Sep 2025 |
| 111 | Midwestern Oil C | | Oil & Gas Operator | May 1995 |
| 112 | Mills, Ralph A. | Louisburg, KS 66053 | Oil Operator | May 1998 |
| 113 | Moylan, Thomas F. | Lacygne, KS 66040 | Oil & Gas Operator | Dec 1993 |
| 114 | Murfin DRLG Co Inc | Wichita, KS 67202 | Oil & Gas Operator | May 2026 |
| 115 | Nickell Drilling | | Oil Operator | Jun 2010 |
| 116 | Norstar Development | Madras, OR 97741 | Oil Operator | Nov 2018 |
| 117 | Oak Ridge LLC | Wellsville, KS 66092 | Oil Operator | Dec 2019 |
| 118 | Oaks Petroleum I | | Oil Operator | Jul 1987 |
| 119 | Opef Partnership, A General Partnership | Overland Park, KS 66221 | Oil Operator | Dec 2011 |
| 120 | Osborn Energy, LLC | Bucyrus, KS 66013 | Oil & Gas Operator | Jul 2017 |
| 121 | P & W Oil | Lakewood, CO 80215 | Oil Operator | Sep 1985 |
| 122 | Patrick Development Corporation | Leawood, KS 66206 | Oil Operator | Mar 2026 |
| 123 | Pelican Resource | | Oil Operator | Jan 1991 |
| 124 | Peoples Oil, LLC | Ottawa, KS 66067 | Oil Operator | Mar 2026 |
| 125 | Petrodome Operating, LLC | Houston, TX 77265 | Oil & Gas Operator | May 2025 |
| 126 | Petroleum Produc | | Oil & Gas Operator | Dec 1996 |
| 127 | Petroleum Production Corporation | Rantoul, KS 66079 | Oil Operator | Feb 2024 |
| 128 | Petroleum Technologies, Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Mar 2026 |
| 129 | Pioneer Oil Company, Inc. | Vincennes, IN 47501 | Oil & Gas Operator | Mar 2026 |
| 130 | Poverty Knob Production, LLC | Osawatomie, KS 66064 | Oil Operator | Mar 2026 |
| 131 | PR Operating, LP (A Texas Limited Partnership) | Frisco, TX 75034 | Gas Operator | Apr 2012 |
| 132 | Prado Petroleum | | Oil Operator | Mar 1982 |
| 133 | Prairie Energy C | | Oil Operator | Oct 1987 |
| 134 | Prairie Oil, LLC | Louisburg, KS 66053 | Oil Operator | Mar 2026 |
| 135 | R & R Partners | | Oil Operator | Oct 2009 |
| 136 | R.T. Enterprises Of Kansas, Inc. | Louisburg, KS 66053 | Oil Operator | Mar 2026 |
| 137 | Red Point Oil | | Oil Operator | May 2019 |
| 138 | Reed Oil, LLC | Louisburg, KS 66053 | Oil Operator | Mar 2026 |
| 139 | Reese Exploratio | | Oil & Gas Operator | Mar 1995 |
| 140 | Reusch Well Service, Inc. | Ottawa, KS 66067 | Oil Operator | Dec 2019 |
| 141 | RH Capital-Beets, LLC | Jefferson City, MO 65101 | Oil Operator | Mar 2026 |
| 142 | Rickerson, Russell | Rantoul, KS 66079 | Oil Operator | Jan 2026 |
| 143 | Rock Oil Company | Broken Arrow, OK 74014-6106 | Oil & Gas Operator | Apr 2026 |
| 144 | Rock Oil Corporation | Lawrence, KS 66046 | Oil Operator | Oct 2004 |
| 145 | Russell James E | | Oil Operator | Apr 1994 |
| 146 | Sanders, Jack W | Wellsville, KS 66092 | Oil Operator | Feb 1996 |
| 147 | Scheuneman, Lester | Ridgeway, MO 64481 | Oil Operator | May 2019 |
| 148 | Scimitar Resc Li | | Oil Operator | Oct 1982 |
| 149 | SCZ Resources, LLC | Houston, TX 77055 | Oil Operator | Mar 2026 |
| 150 | Sharp, Harry D. | Leawood, KS 66209 | Oil Operator | May 1997 |
| 151 | So & Jo, LLC | Kansas City, MO 64158 | Oil Operator | Dec 2021 |
| 152 | Somerset Energy | | Oil Operator | Feb 1986 |
| 153 | Somerset Energy, Inc. | Louisburg, KS 66053 | Oil Operator | Dec 2023 |
| 154 | Stallings Eugene | | Oil Operator | Jul 1994 |
| 155 | Stephenson L G & | | Oil Operator | Apr 1987 |
| 156 | Steve'S Oilfield | | Oil Operator | Jul 1994 |
| 157 | Strata Energy Re | | Oil Operator | Nov 1987 |
| 158 | Superior Oilfield Services LLC | Wichita, KS 67218 | Oil Operator | Mar 2026 |
| 159 | TDR Construction, Inc. | Wellsville, KS 66092 | Oil Operator | Mar 2026 |
| 160 | Tec Drilling Com | | Oil Operator | Feb 1982 |
| 161 | Tenk, Lawrence O. | Ottawa, KS 66067 | Oil & Gas Operator | Oct 1998 |
| 162 | Texokan Resources, Inc. | Dallas, TX 75206 | Oil Operator | Apr 2012 |
| 163 | Thunderbolt Construction Corp. | Louisburg, KS 66053 | Oil Operator | Oct 2024 |
| 164 | Timberlake Energy Corporation | Cypress, TX 77429 | Oil Operator | Nov 2013 |
| 165 | TNT Energy LLC | Paola, KS 66071 | Oil Operator | Dec 2009 |
| 166 | Town Oil Co. | Paola, KS 66071 | Oil & Gas Operator | Mar 2026 |
| 167 | Transamerica Oil | | Oil & Gas Operator | Sep 1992 |
| 168 | Triple K | | Oil Operator | Jun 2007 |
| 169 | Triple T Oil, LLC | Louisburg, KS 66053 | Oil Operator | Jan 2026 |
| 170 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2024 |
| 171 | Utah Oil LLC | Rantoul, KS 66079 | Oil Operator | Mar 2026 |
| 172 | Vast Petroleum Corporation | Highland, UT 84003 | Oil Operator | Jan 2016 |
| 173 | Vast Petroleum Of Kansas LLC | Bozeman, MT 59715 | Oil Operator | Dec 2009 |
| 174 | Vera Cruz Petrol | | Oil & Gas Operator | Oct 1989 |
| 175 | W&W Oil Co | Denver City, TX 79323 | Oil Operator | Jun 2002 |
| 176 | WD Oil Company I | | Oil Operator | Apr 1986 |
| 177 | Widrig, Don | Leawood, KS 66209 | Oil Operator | Jul 2008 |
| 178 | Windler-Doudna, A General Partnership | | Oil Operator | Sep 2000 |
| 179 | Zeta Energy LLC | Ashland, OR 97520 | Oil Operator | Mar 2026 |