| 201 | Hewitt Energy Group Inc | Salt Lake City, UT 84111 | Oil & Gas Operator | Apr 2015 |
| 202 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Sep 2025 |
| 203 | Hoffman Resources LLC | Hoisington, KS 67544 | Oil & Gas Operator | Sep 2025 |
| 204 | Holland Assoc | | Oil Operator | Sep 1987 |
| 205 | Honey Oil Co | Wichita, KS 67226 | Oil & Gas Operator | Mar 2009 |
| 206 | Hummon Corp | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2023 |
| 207 | Hupfer Operating, Inc. | Shawnee, KS 66203 | Oil & Gas Operator | Dec 2019 |
| 208 | Hutchinson Oil C | | Oil & Gas Operator | May 1995 |
| 209 | Hutchinson Oil Co. | | Oil & Gas Operator | Sep 2025 |
| 210 | Indian Wells Oil | | Oil & Gas Operator | Jul 1995 |
| 211 | J & D Investment Co. | | Oil & Gas Operator | Feb 2025 |
| 212 | J & M Water Service, Inc. | Pratt, KS 67124 | Oil Operator | Feb 2000 |
| 213 | J D Dreiling Oil, Inc. | Claflin, KS 67525 | Oil Operator | Sep 2025 |
| 214 | J.R. Oil Productions | | Oil Operator | Jul 2019 |
| 215 | James W. Collins Oil Operations | | Oil Operator | Dec 2009 |
| 216 | Jandie Oil Compa | | Oil Operator | Jul 1990 |
| 217 | Jantz & Associat | | Oil & Gas Operator | Feb 1991 |
| 218 | Jel Resources LLC | Castle Rock, CO 80109 | Oil & Gas Operator | Sep 2025 |
| 219 | JFW Incorporated | Plevna, KS 67568 | Oil & Gas Operator | Oct 2006 |
| 220 | John O. Farmer, Inc. | | Oil & Gas Operator | Dec 1996 |
| 221 | Jones Oil, LLC | St John, KS 67576 | Oil & Gas Operator | Sep 2025 |
| 222 | K & E Drilling I | | Oil & Gas Operator | Sep 1995 |
| 223 | K & K Oil | Chase, KS 67524 | Oil & Gas Operator | Oct 2019 |
| 224 | K & N Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Sep 2025 |
| 225 | K.C. Operations | | Oil Operator | Aug 2025 |
| 226 | Kahan & Associates Inc | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2025 |
| 227 | Kaiser-Francis O | | Oil & Gas Operator | Oct 1995 |
| 228 | Kaiser-Francis Oil | | Oil Operator | Nov 1995 |
| 229 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Feb 2026 |
| 230 | Kansas Horizon O | | Oil & Gas Operator | Jun 1994 |
| 231 | Kansas Oil Prope | | Oil & Gas Operator | Sep 1991 |
| 232 | Kansas Petroleum | | Oil & Gas Operator | Dec 1993 |
| 233 | Kansas Petroleum, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jul 2007 |
| 234 | KBW Oil & Gas Co | Kiowa, KS 67070 | Oil & Gas Operator | Jul 2024 |
| 235 | Kelso Casing Pul | | Oil Operator | Mar 1995 |
| 236 | Kenneco Incorpor | | Oil Operator | Sep 1984 |
| 237 | Kera-Oil | Great Bend, KS 67530 | Oil Operator | Dec 2009 |
| 238 | Kewanee Oil Comp | | Oil & Gas Operator | Nov 1996 |
| 239 | Key Gas Corp. | Wichita, KS 67202 | Oil & Gas Operator | Nov 2018 |
| 240 | Kirkman W L Inco | | Oil & Gas Operator | Dec 1994 |
| 241 | Kirkpatrick Properties LLC | Ellinwood, KS 67526 | Oil Operator | Sep 2025 |
| 242 | Klima Oil, Inc. | Great Bend, KS 67530 | Oil Operator | Dec 2009 |
| 243 | KLM Operating | | Oil & Gas Operator | Mar 2025 |
| 244 | Knighton Oil Com | | Oil & Gas Operator | Nov 1996 |
| 245 | Knighton Oil Company, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 246 | KWB Oil Property | | Oil Operator | Oct 1992 |
| 247 | L & B Oil | Longton, KS 67352 | Oil Operator | Dec 2019 |
| 248 | L & R Oil, Inc. | Great Bend, KS 67530 | Oil Operator | Sep 2025 |
| 249 | L. D. Drilling, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Sep 2025 |
| 250 | La Veta Oil & Gas, LLC | Middleburg, VA 20118 | Oil Operator | Sep 2025 |
| 251 | Lachenmayr Oil LLC | Newton, KS 67114 | Oil & Gas Operator | Sep 2025 |
| 252 | Landmark Oil & G | | Oil Operator | Nov 1987 |
| 253 | Landowner | Honolulu, HI | Oil & Gas Operator | Dec 2008 |
| 254 | Larson Operating | | Oil & Gas Operator | Mar 2001 |
| 255 | Larson Operating Company | Olmitz, KS 67564-8561 | Oil & Gas Operator | Dec 2019 |
| 256 | Lasso Energy LLC | Chase, KS 67524 | Oil & Gas Operator | Sep 2025 |
| 257 | Lauck D R Oil Co | | Oil & Gas Operator | Oct 1995 |
| 258 | Leavell Resource | | Oil Operator | Dec 1993 |
| 259 | Leben Oil Corpor | | Oil & Gas Operator | Apr 1991 |
| 260 | Lebsack Oil Prod | | Oil & Gas Operator | Nov 1995 |
| 261 | Lebsack Oil Production Inc. | Stafford, KS 67578 | Oil & Gas Operator | Sep 2025 |
| 262 | Lee Phillips Oil Company | | Oil Operator | Sep 2025 |
| 263 | Leeman Energy Co | | Oil & Gas Operator | Jan 1987 |
| 264 | Liedtke Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2022 |
| 265 | Lind Oil & Gas | Tulsa, OK 74136 | Gas Operator | Nov 2000 |
| 266 | Loewen Operator, Inc. | Canton, KS 67428 | Oil & Gas Operator | Sep 2025 |
| 267 | Lone Star Resources Company | Keyes, OK 73947 | Oil & Gas Operator | Mar 2015 |
| 268 | Lotus Operating Company, L.L.C. | Wichita, KS 67204 | Oil & Gas Operator | Sep 2025 |
| 269 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2025 |
| 270 | M & L Oil Compan | | Oil Operator | Jun 1993 |
| 271 | Mad Operators LLC | | Oil & Gas Operator | Sep 2025 |
| 272 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Sep 2025 |
| 273 | Manning, Gregory | Ellinwood, KS 67526 | Oil Operator | Sep 2025 |
| 274 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 275 | Mar-Lou Oil Co., LLC | Wilson, KS 67490 | Oil Operator | Sep 2025 |
| 276 | Martin Oil Produ | | Oil & Gas Operator | Dec 1994 |
| 277 | Martin Oil Producers, Inc. | Garland, TX 75046 | Oil & Gas Operator | Aug 2013 |
| 278 | Maxwell Operating Co., Inc. | Englewood, CO 80155 | Oil Operator | Jan 2007 |
| 279 | McGinness Oil Co | Wichita, KS 67202 | Oil & Gas Operator | Dec 2019 |
| 280 | McNic Oil & Gas Midcontinent,Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 1999 |
| 281 | Mem Partnership LP, A General Partnership | Spring, TX 77393 | Oil Operator | Sep 2025 |
| 282 | Mid-American Hyd | | Oil & Gas Operator | Jan 1992 |
| 283 | Mid-Continent En | | Oil & Gas Operator | Nov 1995 |
| 284 | Mid-Continent Energy Corp. | Wichita, KS 67208 | Oil & Gas Operator | Sep 2025 |
| 285 | Mike Kelso Oil, Inc. | Chase, KS 67524 | Oil & Gas Operator | Sep 2025 |
| 286 | Moore, Clay (Deceased) | Dallas, TX 75218 | Oil Operator | Sep 2001 |
| 287 | MTM Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Sep 2025 |
| 288 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Nov 2025 |
| 289 | Murfin Drilling | | Oil & Gas Operator | Jul 1997 |
| 290 | Murfin Drilling Company, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Dec 2025 |
| 291 | Musgrove Energy Inc | Ponca City, OK 74602 | Oil & Gas Operator | Sep 2025 |
| 292 | Mustang Drilling | | Oil & Gas Operator | Nov 1996 |
| 293 | MW Oil, Inc | | Oil & Gas Operator | Sep 2025 |
| 294 | Myers Robert W J | | Oil Operator | Jun 1991 |
| 295 | Nacogdoches Oil & Gas, LLC | Nacogdoches, TX 75961 | Oil & Gas Operator | Dec 2017 |
| 296 | Nadel & Gussman | Tulsa, OK 74103 | Oil & Gas Operator | May 2007 |
| 297 | Nadel And Gussman LLC | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2026 |
| 298 | Nash Oil & Gas, Inc. | Newton, KS 67114 | Oil & Gas Operator | Sep 2025 |
| 299 | National Cooperative Refinery Assoc. | Great Bend, KS 67530 | Oil & Gas Operator | Feb 2023 |
| 300 | National Oil Com | | Oil & Gas Operator | Oct 1992 |