| 101 | L & L Oil Compan | | Oil Operator | Oct 1984 |
| 102 | L&M, Inc. | Vienna, WV 26105 | Oil & Gas Operator | Aug 2025 |
| 103 | Lacen Oil | | Oil Operator | Jan 2002 |
| 104 | Lancer Oil, Inc. | Piqua, KS 66761 | Oil Operator | May 2005 |
| 105 | Layton Oil Compa | | Oil & Gas Operator | Jul 1985 |
| 106 | Leedy Oil Produc | | Oil & Gas Operator | Dec 1995 |
| 107 | Leedy Oil Producers | | Oil Operator | Nov 2009 |
| 108 | Levi Oil Company | Wichita, KS 67218 | Oil & Gas Operator | Nov 1993 |
| 109 | Lobo Oil & Gas, LLC | Benedict, KS 66714 | Oil Operator | Jan 2019 |
| 110 | Lone Star Interests, Inc. | Chanute, KS 66720 | Oil Operator | Sep 2001 |
| 111 | Lorenz, Barton T. | Cherryvale, KS 67335 | Oil & Gas Operator | Jul 2013 |
| 112 | Loveland Energy LLC | Wichita, KS 67206 | Oil Operator | Dec 2009 |
| 113 | LR Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 114 | Lucky Crude, LLC | Erie, KS 66733 | Oil Operator | Nov 2025 |
| 115 | M & C Oil Inc | Indianola, NE 68034 | Oil & Gas Operator | Nov 2013 |
| 116 | M & C Oil Incorp | | Oil Operator | Mar 1995 |
| 117 | M & G Oil Inc | Russell, KS 67665 | Oil Operator | Dec 2025 |
| 118 | M & W Oil LLC | Hamilton, KS 66853 | Oil Operator | Nov 2015 |
| 119 | M H Oil & Gas | Chanute, KS 66720 | Oil & Gas Operator | Aug 1998 |
| 120 | M S Drilling Company | | Oil Operator | Feb 2025 |
| 121 | Markan Oil Incor | | Oil Operator | Mar 1991 |
| 122 | Matlock, Randall K. | Topeka, KS 66607 | Oil Operator | May 2000 |
| 123 | Maxam Incorporat | | Oil Operator | Jun 1991 |
| 124 | McCoy, Jon | Erie, KS 66733 | Oil Operator | Dec 2025 |
| 125 | McMillen, Clay Eugene (Gene) | Chanute, KS 66720 | Oil Operator | Aug 1997 |
| 126 | McRae, William R. | Scottsdale, AZ 85254 | Oil Operator | Aug 1995 |
| 127 | Mico Oil & Gas | Paola, KS 66071 | Oil Operator | Aug 1995 |
| 128 | Mid States Energ | | Oil Operator | Aug 1985 |
| 129 | Midnight Well Se | | Oil Operator | Sep 1994 |
| 130 | Midwestern Oil C | | Oil & Gas Operator | May 1995 |
| 131 | MJ Energy LLC | Denver, CO 80206 | Oil Operator | Jan 2025 |
| 132 | Monarch Energy LLC | Paola, KS 66071 | Oil Operator | Dec 2025 |
| 133 | Morrison, Mark L. | Yates Center, KS 66783 | Oil Operator | Dec 2025 |
| 134 | MSG Resources Inc. | Iola, KS 66749 | Oil Operator | Dec 2025 |
| 135 | Multiplex Resources, Inc. | Baytown, TX 77521 | Oil Operator | Dec 2009 |
| 136 | N & B Enterprise | | Oil Operator | Nov 1994 |
| 137 | N & P Enterprises | | Oil Operator | May 1997 |
| 138 | NC Oil Company, Inc. | Humboldt, KS 66748 | Oil Operator | Nov 2025 |
| 139 | O'Connell, James P. | Vacaville, CA 95687 | Oil Operator | Nov 2009 |
| 140 | Oil & Gas Servic | | Oil Operator | Jun 1983 |
| 141 | Oilfield Truck Service | | Oil Operator | Jun 2014 |
| 142 | Onyxx Oil Corpor | | Oil Operator | Jul 1992 |
| 143 | P & W Oil | Lakewood, CO 80215 | Oil Operator | Sep 1985 |
| 144 | Parker & Parsley | | Oil & Gas Operator | Dec 1996 |
| 145 | Parker Trucking And Assoc. | Independence, MO 64052 | Oil Operator | Aug 1996 |
| 146 | Pennine Resc Inc | | Oil Operator | Sep 1992 |
| 147 | Petrik Oil - Jim | | Oil Operator | Apr 1995 |
| 148 | Petro Energies I | | Oil & Gas Operator | Apr 1991 |
| 149 | Petrol Oil & Gas, Inc. | Overland Park, KS 66210 | Oil & Gas Operator | Dec 2008 |
| 150 | Phillips J L Oil | | Oil Operator | Dec 1992 |
| 151 | Pittman Kenneth | | Oil Operator | Mar 1995 |
| 152 | Postrock Midcontinent Production LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jan 2026 |
| 153 | Production Manag | | Oil Operator | Dec 1986 |
| 154 | Production Team | | Oil & Gas Operator | Sep 1991 |
| 155 | Quest Cherokee LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 156 | Quest Energy Service Inc. | Chanute, KS 66720 | Oil & Gas Operator | Jan 2009 |
| 157 | R-Jann-N Oil | | Oil Operator | Dec 1999 |
| 158 | R. B. Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Nov 1996 |
| 159 | Rama Operating C | | Oil & Gas Operator | Dec 1996 |
| 160 | Ramrod Oil Co., A General Partnership | Iola, KS 66749 | Oil Operator | Nov 2001 |
| 161 | RCS Oil | | Oil Operator | Dec 2025 |
| 162 | Redbud Oil & Gas Operating, LLC | Spring, TX 77379 | Oil & Gas Operator | Dec 2025 |
| 163 | RH Capital-Beets, LLC | Jefferson City, MO 65101 | Oil Operator | Dec 2025 |
| 164 | Rhodes Well Service | | Oil Operator | Dec 2025 |
| 165 | Richard Engineer | | Oil Operator | Mar 1991 |
| 166 | Richard Oil Comp | | Oil Operator | Mar 1992 |
| 167 | River Rock Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 168 | RJ Energy, LLC | Garnett, KS 66032 | Oil Operator | Dec 2025 |
| 169 | RMR Drilling Com | | Oil Operator | Sep 1988 |
| 170 | Russell James E | | Oil Operator | Apr 1994 |
| 171 | See Oil | | Oil Operator | Dec 2025 |
| 172 | Sek Energy, LLC | Benedict, KS 66714 | Oil & Gas Operator | Dec 2025 |
| 173 | Sirius Energy Corp. | Abilene, TX 79606 | Oil Operator | Dec 2009 |
| 174 | Sky Oil, L.L.C. | St. Paul, KS 66771 | Oil Operator | Dec 2004 |
| 175 | Soule, Richard A. | Eureka, KS 67045 | Oil Operator | Sep 2019 |
| 176 | Southwind Exploration, LLC | Venice, FL 34293 | Oil & Gas Operator | Sep 2003 |
| 177 | Stich Oil Company, A General Partnership | Chanute, KS 66720 | Oil Operator | Jul 2014 |
| 178 | Sundance Oil, Inc. | Norfolk, NE 68702 | Oil Operator | Aug 1998 |
| 179 | Sunrise Oil Corp | | Oil Operator | Mar 1992 |
| 180 | T C Production | | Oil Operator | May 1994 |
| 181 | Taylor Explorati | | Oil & Gas Operator | Jun 1985 |
| 182 | Toshic Dynamics, LLC | Scottsdale, AZ 85251 | Oil Operator | Nov 2006 |
| 183 | Touchstone Trading & Transportation Inc | | Oil Operator | Mar 2025 |
| 184 | Tri-L Oil Co. | | Oil Operator | Sep 2015 |
| 185 | Triple K | | Oil Operator | Jun 2007 |
| 186 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2024 |
| 187 | Venture Independent Petroleum, LLC | Llaves, NM 87027 | Oil Operator | Nov 2011 |
| 188 | Vera Cruz Petrol | | Oil & Gas Operator | Oct 1989 |
| 189 | Verde Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2025 |
| 190 | W & W Prod Compa | | Oil Operator | Oct 1995 |
| 191 | W & W Production Company, General Partnership | Chanute, KS 66720 | Oil & Gas Operator | Dec 2025 |
| 192 | W4 Energy, LLC | Humboldt, KS 66748 | Gas Operator | Nov 2015 |
| 193 | Wells-Battelstei | | Oil & Gas Operator | Mar 1993 |
| 194 | Willis Energy | Neodesha, KS 66757 | Oil & Gas Operator | Dec 2009 |
| 195 | Winder Oil Company | | Oil Operator | Jun 2025 |
| 196 | Wintershall Oil | | Oil Operator | Sep 1985 |
| 197 | Wrestler Ronald | | Oil Operator | Dec 1994 |
| 198 | Xenia Corporation, The | Garnett, KS 66032 | Oil Operator | Jan 2001 |
| 199 | Young, Harvey L. | Erie, KS 66733 | Oil Operator | Feb 2008 |