| 101 | Little Chief Energy Corporation | Independence, KS 67301 | Oil Operator | Jul 2025 |
| 102 | Loeb Herman L | | Oil & Gas Operator | Jan 1996 |
| 103 | Lonny Bruce Operations, L.L.C. | McPherson, KS 67460 | Oil & Gas Operator | Apr 2009 |
| 104 | Lotus Operating Company, L.L.C. | Wichita, KS 67204 | Oil & Gas Operator | Jun 2025 |
| 105 | Mach Petroleum, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | Nov 2014 |
| 106 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Jun 2025 |
| 107 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 108 | Marexco, Inc. | Castle Rock, CO 80104 | Oil & Gas Operator | Jun 2025 |
| 109 | Martin Oil Produ | | Oil & Gas Operator | Dec 1994 |
| 110 | Mattingly, Inc. | Wichita, KS 67226 | Gas Operator | Jun 2011 |
| 111 | McO Resources In | | Oil & Gas Operator | Apr 1987 |
| 112 | Merritt Oil Comp | | Oil Operator | Jan 1990 |
| 113 | Messenger Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Jun 2025 |
| 114 | Messman-Rinehart | | Oil & Gas Operator | Mar 1991 |
| 115 | Mike Kelso Oil, Inc. | Chase, KS 67524 | Oil & Gas Operator | Jun 2025 |
| 116 | Milburn, Harold J. | Hutchinson, KS 67502 | Oil & Gas Operator | Sep 2003 |
| 117 | Miller, Myron R. | Haven, KS 67543 | Oil Operator | Oct 2017 |
| 118 | Mohawk Petroleum | | Oil & Gas Operator | Jan 1995 |
| 119 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 120 | Murfin Drilling | | Oil & Gas Operator | Jul 1997 |
| 121 | Musgrove Energy Inc | Ponca City, OK 74602 | Oil & Gas Operator | Feb 2025 |
| 122 | MW Oil, Inc | | Oil & Gas Operator | Jun 2025 |
| 123 | Nash Oil & Gas, Inc. | Newton, KS 67114 | Oil & Gas Operator | Jun 2025 |
| 124 | National Crude O | | Oil & Gas Operator | Jun 1991 |
| 125 | National Develop | | Oil & Gas Operator | Jan 1990 |
| 126 | National Oil Com | | Oil & Gas Operator | Oct 1992 |
| 127 | New Age Oil LLC | Hays, KS 67601 | Oil & Gas Operator | Jun 2025 |
| 128 | New Gulf Operating LLC | Tulsa, OK 74133 | Oil Operator | Sep 2023 |
| 129 | Novy Oil & Gas, Inc. | Goddard, KS 67052 | Oil & Gas Operator | Oct 2025 |
| 130 | Ocfiw Oil Company, Inc. | Hartington, NE 68739 | Oil & Gas Operator | Dec 2009 |
| 131 | Oil Producers In | | Oil & Gas Operator | Dec 1996 |
| 132 | Oil Prop Company | | Oil & Gas Operator | Sep 1995 |
| 133 | Oil Properties Co., Inc. | Wichita, KS 67208 | Gas Operator | Dec 2009 |
| 134 | Oil Property Man | | Oil & Gas Operator | Jun 1995 |
| 135 | Oil-Tech Prod Co | | Oil & Gas Operator | Oct 1992 |
| 136 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 137 | Palomino Petroleum Inc | Newton, KS 67114 | Oil & Gas Operator | Jun 2025 |
| 138 | Petroleum Property Services, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 139 | Petroleum Technologies, Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Jun 2025 |
| 140 | Phillips Explora | | Oil & Gas Operator | Dec 1996 |
| 141 | Phillips Exploration Company L.C. | Andover, KS 67002 | Oil & Gas Operator | Jun 2025 |
| 142 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 143 | Pickrell Drilling Co., Inc. | Wichita, KS 67213 | Oil & Gas Operator | Jun 2025 |
| 144 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 145 | Pioneer Oil Company, Inc. | Vincennes, IN 47501 | Oil & Gas Operator | Jun 2025 |
| 146 | Plains Oil & Gas | Cushing, OK 74023-4819 | Oil & Gas Operator | Jan 2019 |
| 147 | Plains Oil Compa | | Oil & Gas Operator | Aug 1988 |
| 148 | Platte Valley Oil Co Inc | Ralston, NE 68127 | Oil Operator | Jun 2025 |
| 149 | Post Rock Gas, Inc. | Luray, KS 67699 | Oil & Gas Operator | Jun 2003 |
| 150 | Postrock Midcontinent Production LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Sep 2025 |
| 151 | Prairie Wolf Operating, LLC | Stilwell, OK 74960 | Oil & Gas Operator | Jun 2025 |
| 152 | Pratt Well Service, Inc. | Pratt, KS 67124 | Oil & Gas Operator | Jun 2025 |
| 153 | Producers Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2007 |
| 154 | R & B Oil & Gas | | Oil & Gas Operator | Jul 1995 |
| 155 | R & B Oil & Gas Inc | Attica, KS 67009 | Oil & Gas Operator | Jun 2025 |
| 156 | Rama Operating C | | Oil & Gas Operator | Dec 1996 |
| 157 | Rama Operating Company Inc | Stafford, KS 67578 | Oil & Gas Operator | Oct 2025 |
| 158 | Ramco Drilling S | | Oil & Gas Operator | Dec 1992 |
| 159 | Ramco Energy Corporation | FT. Lauderdale, FL 33312 | Oil & Gas Operator | Dec 2008 |
| 160 | Raymond Oil Co., Inc. | Wichita, KS 67201 | Oil & Gas Operator | Jun 2025 |
| 161 | Raymond Oil Comp | | Oil & Gas Operator | Dec 1996 |
| 162 | Recovery Resourc | | Oil Operator | Dec 1986 |
| 163 | Resource Operations Inc | Tulsa, OK 74157 | Oil & Gas Operator | May 2016 |
| 164 | Ressler Well Service, Inc. | Burrton, KS 67020 | Oil & Gas Operator | Jun 2025 |
| 165 | Ritchie Explorat | | Oil & Gas Operator | Dec 1996 |
| 166 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |
| 167 | River Rock Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 168 | Robinowitz Oil C | | Oil Operator | Dec 1996 |
| 169 | Rupe Oil Company Inc | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |
| 170 | S & K Oil Compan | | Oil Operator | Sep 1989 |
| 171 | S & S Oil & Gas LLC | Skiatook, OK 74070 | Oil & Gas Operator | Jul 2016 |
| 172 | Shaw George R | | Oil & Gas Operator | Mar 1992 |
| 173 | Shaw Robert Lesl | | Oil Operator | Oct 1989 |
| 174 | Shields Oil Prod | | Oil & Gas Operator | Aug 1995 |
| 175 | Shields Oil Producers Inc. | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 176 | Simasko Producti | | Oil Operator | Dec 1986 |
| 177 | Smith Oil Operations | | Oil & Gas Operator | Jun 2025 |
| 178 | Smoky Valley Res | | Oil & Gas Operator | Dec 1995 |
| 179 | Sorensen, Kim A. | Abbyville, KS 67510 | Oil Operator | Mar 2025 |
| 180 | Southern Hills Gas Co. | | Oil Operator | May 2025 |
| 181 | Southern States | | Oil & Gas Operator | Jul 1988 |
| 182 | Stelbar Oil Corporation, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 183 | Sterling Drillin | | Oil & Gas Operator | Mar 1992 |
| 184 | Sterling Drilling Company | Pratt, KS 67124 | Oil & Gas Operator | Apr 2014 |
| 185 | T G T Petroleum Corporation | Wichita, KS 67275 | Oil & Gas Operator | Jun 2025 |
| 186 | Talon Group LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 187 | Te-Pe Oil & Gas | | Oil & Gas Operator | Jun 2025 |
| 188 | Tenneco Oil Comp | | Oil & Gas Operator | Aug 1995 |
| 189 | Texas Energies I | | Oil & Gas Operator | Aug 1994 |
| 190 | TGT Petroleum Co | | Oil & Gas Operator | Apr 1995 |
| 191 | Thomason Petroleum, Inc | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 192 | Thunderbird Dril | | Oil & Gas Operator | Nov 1995 |
| 193 | Topat Oil Corporation | Midland, TX 79701 | Oil & Gas Operator | Sep 2017 |
| 194 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | Oct 2025 |
| 195 | Trek Aec, LLC | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 196 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2025 |
| 197 | United Meridian | | Oil Operator | Dec 1992 |
| 198 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2023 |
| 199 | Val Energy, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 200 | Vamco Operations | | Oil & Gas Operator | Jun 2025 |