| 201 | Oneok Energy Service | | Gas Operator | Dec 2008 |
| 202 | Oneok Exploratio | | Oil & Gas Operator | Mar 1995 |
| 203 | Oneok Resources Company | Tulsa, OK 74102 | Oil & Gas Operator | Feb 2017 |
| 204 | Osborn Heirs Company LTD | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2024 |
| 205 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Nov 2024 |
| 206 | Palomino Petrole | | Oil & Gas Operator | Dec 1995 |
| 207 | Palomino Petroleum Inc | Newton, KS 67114 | Oil & Gas Operator | Jul 2024 |
| 208 | Par Petroleum In | | Oil & Gas Operator | Jun 1993 |
| 209 | Patton Oil Compa | | Oil & Gas Operator | Nov 1994 |
| 210 | Petrie Enterpris | | Oil & Gas Operator | Sep 1986 |
| 211 | Petrie, Stanley D. | Pratt, KS 67124 | Gas Operator | Aug 1995 |
| 212 | Petro Locators I | | Oil & Gas Operator | Dec 1995 |
| 213 | Petroleum Manage | | Oil & Gas Operator | Oct 1994 |
| 214 | Petroleum Property Services, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jul 2024 |
| 215 | Phillips Petrole | | Oil & Gas Operator | May 1995 |
| 216 | Pickrell Drilling Co., Inc. | Wichita, KS 67213 | Oil & Gas Operator | Jul 2024 |
| 217 | Pintail Petroleu | | Oil & Gas Operator | Dec 1995 |
| 218 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 219 | Plains Petroleum | | Gas Operator | Dec 1996 |
| 220 | Plains Petroleum Operating Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2014 |
| 221 | Plano Petroleum | | Oil & Gas Operator | Dec 1994 |
| 222 | Plano Petroleum Corporation | McKinney, TX 75070 | Oil & Gas Operator | Jun 2024 |
| 223 | Ponderosa Witching, LLC | Waco, TX 76705 | Oil Operator | Jul 2024 |
| 224 | Prater Oil & Gas Operations, Inc. | Pratt, KS 67124 | Oil & Gas Operator | Jul 2024 |
| 225 | Prater Ronald Ru | | Gas Operator | Mar 1989 |
| 226 | Pratt Well Servi | | Oil & Gas Operator | Jul 1996 |
| 227 | Pratt Well Service, Inc. | Pratt, KS 67124 | Oil & Gas Operator | Jul 2024 |
| 228 | Pride Energy Company, A General Partnership | Tulsa, OK 74170 | Oil & Gas Operator | Aug 2021 |
| 229 | Prisum Ventures | | Oil & Gas Operator | Oct 1995 |
| 230 | Ram Petroleum Co | | Oil & Gas Operator | Sep 1983 |
| 231 | Rama Operating C | | Oil & Gas Operator | Dec 1996 |
| 232 | Rama Operating Co., Inc. | Stafford, KS 67578 | Oil & Gas Operator | Sep 2024 |
| 233 | Range Oil Co., Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jan 2020 |
| 234 | Raymond Oil Co., Inc. | Wichita, KS 67201 | Oil & Gas Operator | Jul 2024 |
| 235 | Raymond Oil Comp | | Oil & Gas Operator | Dec 1996 |
| 236 | Reach Petroleum | | Oil & Gas Operator | Jan 1994 |
| 237 | Redboot Production, Inc | Stafford, KS 67578 | Gas Operator | Jan 2017 |
| 238 | Reh Oil And Gas, LLC. | Pratt, KS 67124 | Oil & Gas Operator | Apr 2019 |
| 239 | Resource Venture | | Oil & Gas Operator | Oct 1991 |
| 240 | Richardson J Mar | | Oil & Gas Operator | Apr 1995 |
| 241 | Richardson Oil | | Oil & Gas Operator | Dec 2019 |
| 242 | Rine Drilling Co | | Oil & Gas Operator | Mar 1994 |
| 243 | Ritchie Explorat | | Oil & Gas Operator | Dec 1996 |
| 244 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Aug 2024 |
| 245 | Robert-Gay Energ | | Oil & Gas Operator | Jun 1992 |
| 246 | Robert-Gay Energy Enterprises | Hutchinson, KS 67501 | Oil Operator | Nov 1999 |
| 247 | Robinson Energy & Exploration, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Aug 2008 |
| 248 | Robinson Oil Com | | Oil & Gas Operator | Feb 1995 |
| 249 | Ronald Russ Prater, Inc. | Eastborough, KS 67207 | Gas Operator | May 2024 |
| 250 | Royal Drilling Inc | Russell, KS 67665 | Oil Operator | Jul 2024 |
| 251 | Rupe Oil Company, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jul 2024 |
| 252 | S & K Oil Compan | | Oil Operator | Sep 1989 |
| 253 | Sagebrush Operating LLC | Denver, CO 80203 | Oil & Gas Operator | May 2024 |
| 254 | Seagull Operatin | | Oil & Gas Operator | Jul 1995 |
| 255 | Servco Productio | | Oil Operator | Dec 1992 |
| 256 | SH Oil Operations LLC | Wichita, KS 67277 | Oil & Gas Operator | Jul 2024 |
| 257 | Sharp Engineerin | | Oil Operator | Aug 1995 |
| 258 | Shelby Resources LLC | Denver, CO 80207 | Oil & Gas Operator | Jul 2024 |
| 259 | Siroky Oil Management | Pratt, KS 67124 | Oil & Gas Operator | Jul 2024 |
| 260 | Southwind Consulting | Pratt, KS 67124 | Oil Operator | Oct 1997 |
| 261 | Spines Explorati | | Oil & Gas Operator | Dec 1990 |
| 262 | Sterling Petrole | | Oil & Gas Operator | Sep 1992 |
| 263 | Stoeppelwerth DR | | Oil Operator | May 1993 |
| 264 | Studer Oil Co. | Pratt, KS 67124 | Oil Operator | Oct 2019 |
| 265 | Studer Oil Compa | | Oil & Gas Operator | Feb 1993 |
| 266 | Sunwest Explorat | | Oil & Gas Operator | Nov 1985 |
| 267 | Supernova Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 268 | Tenneco Oil Comp | | Oil & Gas Operator | Aug 1995 |
| 269 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Jul 2024 |
| 270 | Texaco Explorati | | Oil & Gas Operator | Dec 1996 |
| 271 | Texas Energies I | | Oil & Gas Operator | Aug 1994 |
| 272 | Texas Energies, Inc. | Pratt, KS 67124 | Oil & Gas Operator | Aug 1998 |
| 273 | TGT Petroleum Co | | Oil & Gas Operator | Apr 1995 |
| 274 | TGT Petroleum Corporation | Wichita, KS 67275 | Oil & Gas Operator | Jul 2024 |
| 275 | Thomas Garner, Inc. | St John, KS 67576 | Oil & Gas Operator | Jul 2024 |
| 276 | Thoroughbred Associates L.L.C. | Wichita, KS 67226 | Oil & Gas Operator | Jul 2024 |
| 277 | Timberline Oil & | | Oil & Gas Operator | Jul 1995 |
| 278 | Timberline Oil & Gas | | Oil & Gas Operator | Sep 1995 |
| 279 | Timberline Oil & Gas Corporation | Rapid City, SD 57702 | Oil & Gas Operator | Jul 2024 |
| 280 | Tko Investments, Inc. | Dodge City, KS 67801 | Oil & Gas Operator | Jul 2024 |
| 281 | Trans Pacific Oi | | Oil & Gas Operator | May 1995 |
| 282 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | Sep 2024 |
| 283 | Trek Aec, LLC | Wichita, KS 67202 | Oil & Gas Operator | Jul 2024 |
| 284 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2022 |
| 285 | Vac Petroleum Co | | Oil Operator | Dec 1990 |
| 286 | Val Energy, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jul 2024 |
| 287 | Vess Oil Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2024 |
| 288 | Vess Transpacifi | | Oil & Gas Operator | Jul 1995 |
| 289 | Vess-Transpacific Operating Co., Inc. | Wichita, KS 67201 | Oil & Gas Operator | May 2024 |
| 290 | Victory Operating, Inc. | Andover, KS 67002 | Oil & Gas Operator | Jul 2024 |
| 291 | Vincent Oil Corp | Wichita, KS 67202 | Oil & Gas Operator | Jul 2024 |
| 292 | Walcher Oil, LC | Bellevue, WA 98009 | Oil & Gas Operator | Jul 2024 |
| 293 | Walcher, Wayne E. | Wichita, KS 67202 | Oil & Gas Operator | May 2024 |
| 294 | Wells Energy Com | | Oil & Gas Operator | Mar 1994 |
| 295 | Wenert Trich Oil | | Oil & Gas Operator | Jul 1990 |
| 296 | White & Ellis DR | | Oil & Gas Operator | Aug 1995 |
| 297 | White & Ellis Drilling, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jul 2024 |
| 298 | White Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jul 2024 |
| 299 | White Hawk Oil C | | Oil & Gas Operator | Sep 1995 |
| 300 | White Marlin Operating Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |