| 101 | Foxfire Expl. | | Oil Operator | Jun 1997 |
| 102 | Foxfire Explorat | | Oil Operator | Dec 1986 |
| 103 | Froelich Oil | | Oil Operator | Apr 2010 |
| 104 | Frontier Oil Com | | Oil & Gas Operator | May 1995 |
| 105 | Frontier Oil Company | | Oil Operator | Oct 1999 |
| 106 | G L M Company | | Oil Operator | Jun 2025 |
| 107 | Gager, Sally | Hays, KS 67601 | Oil Operator | Feb 1998 |
| 108 | Galloway Drillin | | Oil Operator | Dec 1996 |
| 109 | Glickman Incorpo | | Oil Operator | Jun 1988 |
| 110 | Gore Oil Company | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 111 | Grand Mesa Operating Co | Wichita, KS 67206 | Oil & Gas Operator | Aug 2025 |
| 112 | Great Eastern En | | Oil & Gas Operator | Nov 1995 |
| 113 | Great Plains Energy, Inc. | Lincoln, NE 68516 | Oil & Gas Operator | Jun 2025 |
| 114 | H & C Oil Operat | | Oil & Gas Operator | Dec 1996 |
| 115 | H & C Oil Operating Inc. | Plainville, KS 67663 | Oil & Gas Operator | Jun 2025 |
| 116 | H & M Petroleum Corporation | Lincoln, NE 68516 | Oil & Gas Operator | Jun 2025 |
| 117 | H-30 Incorporate | | Oil & Gas Operator | Nov 1990 |
| 118 | H3 Oil & Gas | | Oil & Gas Operator | Jun 2025 |
| 119 | Hansen Dane G TR | | Oil Operator | Feb 1995 |
| 120 | Helmerich & Payn | | Oil & Gas Operator | Aug 1995 |
| 121 | Heritage Oil L.L.C. | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 122 | Herman L. Loeb, LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Jun 2025 |
| 123 | Hess Oil Company | McPherson, KS 67460 | Oil & Gas Operator | Jun 2025 |
| 124 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Jun 2025 |
| 125 | High Plains Oil | | Oil Operator | Jun 1989 |
| 126 | Hoffman Petroleu | | Oil Operator | Sep 1989 |
| 127 | Hyde-Marrs, Inc. | Wichita, KS 67202 | Oil Operator | Aug 1997 |
| 128 | J & D Investment | | Oil Operator | Oct 1993 |
| 129 | J & J Contract Pumping LLC | Wakeeney, KS 67672 | Oil Operator | Dec 2019 |
| 130 | Jake'S Oil Co. | | Oil Operator | Oct 2019 |
| 131 | Jason Oil Company, LLC | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 132 | Jay Boy Oil Inco | | Oil & Gas Operator | May 1992 |
| 133 | John O. Farmer, Inc. | | Oil & Gas Operator | Dec 1996 |
| 134 | Kaiser-Francis O | | Oil & Gas Operator | Oct 1995 |
| 135 | Kaiser-Francis Oil | | Oil Operator | Nov 1995 |
| 136 | Kansas Oil Prope | | Oil & Gas Operator | Sep 1991 |
| 137 | Kimbark Oil & Ga | | Oil & Gas Operator | Aug 1992 |
| 138 | Kirkman W L Inco | | Oil & Gas Operator | Dec 1994 |
| 139 | Knighton Oil Com | | Oil & Gas Operator | Nov 1996 |
| 140 | Knighton Oil Company, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 141 | Koron Investments, Inc. | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 142 | L B Petroleum In | | Oil Operator | Nov 1995 |
| 143 | L-K Wireline, Inc. | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 144 | L. D. Drilling, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jun 2025 |
| 145 | Landes Explorati | | Oil Operator | Apr 1995 |
| 146 | Landmark Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jun 2025 |
| 147 | Landowner | Honolulu, HI | Oil & Gas Operator | Dec 2008 |
| 148 | Larson Operating | | Oil & Gas Operator | Mar 2001 |
| 149 | Larson Operating Company | Olmitz, KS 67564-8561 | Oil & Gas Operator | Dec 2019 |
| 150 | Lasmo Energy Cor | | Oil Operator | Feb 1990 |
| 151 | Lazer Petroleum | | Oil Operator | Jan 1993 |
| 152 | Leben Oil Corpor | | Oil & Gas Operator | Apr 1991 |
| 153 | Lloyd Drilling Company | Morland, KS 67650 | Oil Operator | Oct 2009 |
| 154 | M E Klein & Associates, Inc. | Norman, OK 73070 | Oil & Gas Operator | Jun 2025 |
| 155 | Mad Operators LLC | | Oil & Gas Operator | Jun 2025 |
| 156 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Jun 2025 |
| 157 | Mai Operations | | Oil Operator | Dec 1996 |
| 158 | Manta Petroleum, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jun 2020 |
| 159 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Jul 2025 |
| 160 | Mar-Lou Oil Co., LLC | Wilson, KS 67490 | Oil Operator | Jun 2025 |
| 161 | Marexco | | Oil & Gas Operator | Nov 1994 |
| 162 | Marexco, Inc. | Castle Rock, CO 80104 | Oil & Gas Operator | Jun 2025 |
| 163 | Marmac Petroleum | | Oil & Gas Operator | Oct 1994 |
| 164 | Martin Phillips | | Oil Operator | Dec 1987 |
| 165 | Martin, Philip H. | Ellis, KS 67637 | Oil Operator | Apr 2000 |
| 166 | Maverick Oil Co. | Richland, TX 76681 | Oil Operator | Oct 2025 |
| 167 | Maxus Exploratio | | Oil Operator | Jun 1991 |
| 168 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | Aug 2025 |
| 169 | McElvain Energy Inc | Denver, CO 80265 | Oil & Gas Operator | Nov 2019 |
| 170 | Meyer Douglas P | Longmont, CO 80501 | Oil & Gas Operator | Aug 2006 |
| 171 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2025 |
| 172 | Mid-Continent En | | Oil & Gas Operator | Nov 1995 |
| 173 | Mid-Continent Energy Corp. | Wichita, KS 67208 | Oil & Gas Operator | Jun 2025 |
| 174 | Mike Kelso Oil, Inc. | Chase, KS 67524 | Oil & Gas Operator | Jun 2025 |
| 175 | MJT Oil | | Oil Operator | Jun 2025 |
| 176 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Aug 2025 |
| 177 | Murfin Drilling | | Oil & Gas Operator | Jul 1997 |
| 178 | Murfin Drilling Company Inc | Wichita, KS 67202 | Oil & Gas Operator | Aug 2025 |
| 179 | Mustang Energy Corporation | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 180 | Nadel And Gussman | Tulsa, OK 74103 | Oil & Gas Operator | May 2007 |
| 181 | Nec Operating - Kansas, LLC | Southlake, TX 76092 | Oil & Gas Operator | Jun 2025 |
| 182 | New Age Oil LLC | Hays, KS 67601 | Oil & Gas Operator | Jun 2025 |
| 183 | Noah, Calvin | Valley Center, KS 67147 | Oil Operator | Oct 2010 |
| 184 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 185 | Norstar Petroleum Inc | Englewood, CO 80112 | Oil & Gas Operator | Jun 2025 |
| 186 | Northstar Investments, Inc. | Wichita, KS 67230 | Oil & Gas Operator | Jun 2025 |
| 187 | Ohio Kentucky Oil Corporation | Lexington, KY 40503 | Oil & Gas Operator | Dec 2023 |
| 188 | Oil Producers In | | Oil & Gas Operator | Dec 1996 |
| 189 | Okmar Oil Compan | | Oil & Gas Operator | Feb 1995 |
| 190 | Oxford Explorati | | Oil & Gas Operator | Mar 1993 |
| 191 | Oxford Exploration | | Oil Operator | Apr 1988 |
| 192 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 193 | Palomino Petroleum Inc | Newton, KS 67114 | Oil & Gas Operator | Jun 2025 |
| 194 | Parrish Corporat | | Oil & Gas Operator | Oct 1994 |
| 195 | Parrish Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jan 2025 |
| 196 | Patterson Energy LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 197 | Patterson Jerry | | Oil Operator | Jan 1995 |
| 198 | Patton Oil Compa | | Oil & Gas Operator | Nov 1994 |
| 199 | Pelican Hill Oil & Gas Inc | Carlsbad, CA 92010 | Oil & Gas Operator | May 2013 |
| 200 | Petroleum Corpor | | Oil Operator | Jan 1983 |