| 101 | Kansas Oil, Inc. | Chanute, KS 66720 | Oil Operator | Dec 2009 |
| 102 | Katana Resources | | Oil & Gas Operator | Aug 1984 |
| 103 | Kelt Energy Inco | | Oil & Gas Operator | Sep 1995 |
| 104 | L & L Oil Compan | | Oil Operator | Oct 1984 |
| 105 | L D O Incorporat | | Oil Operator | Jul 1988 |
| 106 | L V Gas Incorpor | | Oil & Gas Operator | Mar 1991 |
| 107 | L&M, Inc. | Vienna, WV 26105 | Oil & Gas Operator | Aug 2025 |
| 108 | Lakeshore Operating, LLC | Wichita, KS 67203 | Oil & Gas Operator | Feb 2026 |
| 109 | Landowner | Honolulu, HI | Oil & Gas Operator | Dec 2008 |
| 110 | Laymon, Michael | Yates Center, KS 66783 | Oil Operator | Jun 2025 |
| 111 | Layne Energy Operating, LLC | Kansas City, KS 66106 | Oil & Gas Operator | Feb 2025 |
| 112 | Lee Donna Oil Co | | Oil & Gas Operator | Dec 1996 |
| 113 | Leedy Oil Produc | | Oil & Gas Operator | Dec 1995 |
| 114 | Leis, John E. | Yates Center, KS 66783 | Oil Operator | Sep 2025 |
| 115 | Leis, VIctor J. | Paola, KS 66071 | Oil & Gas Operator | Sep 2025 |
| 116 | Levi Oil Company | Wichita, KS 67218 | Oil & Gas Operator | Nov 1993 |
| 117 | Little Joe'S Oil Company | | Oil Operator | Jul 2020 |
| 118 | Lockhart Oil LLC | Neosho Falls, KS 66758 | Oil Operator | Jul 2025 |
| 119 | Longton Explorat | | Oil & Gas Operator | Jul 1993 |
| 120 | Longton Explorations | | Oil & Gas Operator | Aug 2025 |
| 121 | Lorenz, James D. | Parsons, KS 67357 | Oil & Gas Operator | May 2014 |
| 122 | LR Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2025 |
| 123 | Ludco Incorporat | | Gas Operator | Mar 1990 |
| 124 | M & O Oil Co.A General Partnership | Fredonia, KS 66736 | Oil Operator | May 2025 |
| 125 | M H Oil & Gas | Chanute, KS 66720 | Oil & Gas Operator | Aug 1998 |
| 126 | M&M Services LLC | Neodesha, KS 66757 | Gas Operator | Sep 2025 |
| 127 | Major Oil Compan | | Oil Operator | Mar 1988 |
| 128 | Mak Oil & Gas Co | | Oil Operator | Mar 2009 |
| 129 | Maple Leaf Energ | | Oil & Gas Operator | Sep 1989 |
| 130 | Marshall Oil LLC | Eureka, KS 67045 | Oil Operator | Sep 2025 |
| 131 | Martindale Enter | | Oil & Gas Operator | Oct 1996 |
| 132 | Massey, Gary R. | Eureka, KS 67045 | Oil Operator | Sep 2025 |
| 133 | Matuk, Edward C. | Neodesha, KS 66757 | Oil Operator | Aug 1989 |
| 134 | McMillen, Clay Eugene (Gene) | Chanute, KS 66720 | Oil Operator | Aug 1997 |
| 135 | McPherson Drilling | | Oil Operator | Jun 2015 |
| 136 | Midnight Well Se | | Oil Operator | Sep 1994 |
| 137 | Midwestern Oil C | | Oil & Gas Operator | May 1995 |
| 138 | Miller Oil Company, LLC | Chanute, KS 66720 | Oil Operator | Jun 2025 |
| 139 | Mitchell Energy | | Oil & Gas Operator | Dec 1996 |
| 140 | Miura Petroleum | | Oil Operator | Dec 1992 |
| 141 | Monfort, Roy C. | Iola, KS 66749 | Oil & Gas Operator | Sep 1989 |
| 142 | Morris Everett E | | Oil & Gas Operator | Feb 1991 |
| 143 | Morrison, Mark L. | Yates Center, KS 66783 | Oil Operator | Sep 2025 |
| 144 | Murphy, Charles H. | Altoona, KS 66710 | Oil Operator | Jul 2022 |
| 145 | N & B Enterprise | | Oil Operator | Nov 1994 |
| 146 | Nataraja Oil Corporation | Foley, AL 36535 | Oil Operator | Aug 2010 |
| 147 | New Donna Lee Oil Company | Bakersfield, CA 93308 | Oil & Gas Operator | Jul 2025 |
| 148 | New Western Operating, LLC | Irvine, CA 92618 | Oil & Gas Operator | Dec 2019 |
| 149 | Numac LLC | Cherryvale, KS 67335 | Oil Operator | Jun 2025 |
| 150 | Olson D Producti | | Oil Operator | Jul 1994 |
| 151 | Onyxx Oil Corpor | | Oil Operator | Jul 1992 |
| 152 | Owens Oil | | Oil Operator | Dec 2000 |
| 153 | Perrin Oil Compa | | Oil & Gas Operator | Jun 1985 |
| 154 | Petrol Oil & Gas, Inc. | Overland Park, KS 66210 | Oil & Gas Operator | Dec 2008 |
| 155 | Petroleum Produc | | Oil & Gas Operator | Dec 1996 |
| 156 | Phillips J L Oil | | Oil Operator | Dec 1992 |
| 157 | Pickett Brothers | | Oil Operator | Dec 1995 |
| 158 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | Sep 2025 |
| 159 | Postrock Midcontinent Production LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Nov 2025 |
| 160 | Prairie State Pe | | Oil Operator | Jul 1994 |
| 161 | Production Team | | Oil & Gas Operator | Sep 1991 |
| 162 | Quantum Energy | Red Lodge, MT 59068 | Gas Operator | Jan 1998 |
| 163 | Quest Cherokee LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 164 | Quest Development Co. | | Oil Operator | Sep 2025 |
| 165 | Quest Energy Service Inc. | Chanute, KS 66720 | Oil & Gas Operator | Jan 2009 |
| 166 | Quogue Oil & Gas, Inc. | New York, NY 10022 | Gas Operator | Jun 1998 |
| 167 | R & M Oil Co. | Fredonia, KS 66736 | Oil & Gas Operator | Aug 2002 |
| 168 | Raida, Junior V. | Neodesha, KS 66757 | Oil Operator | Jul 2013 |
| 169 | Reata Petroleum LLC | Independence, KS 67301 | Oil & Gas Operator | Sep 2025 |
| 170 | Redbud Oil & Gas Operating, LLC | Spring, TX 77379 | Oil & Gas Operator | Sep 2025 |
| 171 | Reese Exploratio | | Oil & Gas Operator | Mar 1995 |
| 172 | Richey Heartsill | | Oil Operator | Feb 1991 |
| 173 | Rick'S Well Service | Cherryvale, KS 67335 | Oil & Gas Operator | Apr 2023 |
| 174 | River Rock Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 175 | Riveria Drilling | | Oil Operator | Aug 1984 |
| 176 | Rowden, John A. | Chanute, KS 66720 | Oil Operator | Oct 1998 |
| 177 | S C B Oil Co. | Fredonia, KS 66736 | Gas Operator | Dec 2009 |
| 178 | Sand Dollar Ener | | Oil Operator | Aug 1984 |
| 179 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 180 | SCZ Resources, LLC | Houston, TX 77055 | Oil Operator | Sep 2025 |
| 181 | Sek Energy, LLC | Benedict, KS 66714 | Oil & Gas Operator | Sep 2025 |
| 182 | Sek Oil Incorpor | | Oil Operator | Jun 1985 |
| 183 | Seymour Oil Co Inc | Edmond, OK 73025 | Oil & Gas Operator | Jul 2011 |
| 184 | So-I , A General Partnership | Kansas City, MO 64106 | Oil & Gas Operator | Jun 2025 |
| 185 | Southwind Exploration, LLC | Venice, FL 34293 | Oil & Gas Operator | Sep 2003 |
| 186 | Stoeppelwerth DR | | Oil Operator | May 1993 |
| 187 | Strata Oil Incor | | Oil Operator | Mar 1994 |
| 188 | Sunrise Oil Corp | | Oil Operator | Mar 1992 |
| 189 | Tech American Re | | Oil Operator | Sep 1985 |
| 190 | Tharp Oil, A General Partnership | Chanute, KS 66720 | Oil Operator | Mar 2014 |
| 191 | Thornton Oil Co. | Abilene, TX 79603 | Oil & Gas Operator | Aug 2003 |
| 192 | Three D Oil Comp | | Oil & Gas Operator | Jan 1988 |
| 193 | Thurber, Gueydon | Horseshoe Bay, TX 78657 | Oil Operator | May 2001 |
| 194 | Toil Inc. | Neodesha, KS 66757 | Oil & Gas Operator | Sep 2025 |
| 195 | Tontol, LLC | Scottsdale, AZ 85250 | Oil Operator | Sep 2025 |
| 196 | Toshic Dynamics, LLC | Scottsdale, AZ 85251 | Oil Operator | Nov 2006 |
| 197 | Townes, Don | Clarksville, TX 75426 | Oil & Gas Operator | Feb 2026 |
| 198 | Triken Oil & Gas | | Oil & Gas Operator | Feb 1995 |
| 199 | Triken Oil & Gas, Inc. | Bellingham, WA 98225 | Gas Operator | Dec 1996 |
| 200 | Triple - I, Inc. | Kansas City, MO 64114 | Gas Operator | Oct 2000 |