| 201 | Federated Oil & Gas Properties | Traverse City, MI 49685 | Gas Operator | Mar 2014 |
| 202 | Federated Oil And Gas Properties Inc | | Oil & Gas Operator | May 2025 |
| 203 | Federer, H. C. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 1993 |
| 204 | Fee Energy Corporation | | Oil & Gas Operator | Jul 1978 |
| 205 | Feeley Ranch LLC | Broken Arrow, OK 74014 | Gas Operator | Dec 2017 |
| 206 | Fees Jr And Son Oil & Gas* Walter S | | Oil & Gas Operator | May 2025 |
| 207 | Feezel A L LLC | Ada, OK 74821-1371 | Oil & Gas Operator | Mar 2015 |
| 208 | Feikls Oil & Gas Inc | Eagle, ID 83616-7713 | Oil & Gas Operator | Dec 2024 |
| 209 | Feinen, Richard C. | Forestville, NY 14062 | Gas Operator | Dec 2024 |
| 210 | Feldco, Inc. | | Oil & Gas Operator | Apr 2007 |
| 211 | Felderhoff Production Company | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |
| 212 | Felix Energy Holdings II, LLC | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2020 |
| 213 | Felix Energy LLC | Denver, CO 80202-1467 | Oil & Gas Operator | Apr 2025 |
| 214 | Fell Oil & Gas C | | Oil Operator | Oct 1991 |
| 215 | Fell Oil And Gas Inc | Tulsa, OK 74157-9487 | Oil & Gas Operator | Aug 2016 |
| 216 | Fell, Clarence | | Gas Operator | Dec 1972 |
| 217 | Fell-Brecklein-Town Oil Co. | | Oil Operator | Dec 1975 |
| 218 | Fellows Energy LTD | Price, UT 84501-2016 | Gas Operator | Sep 2007 |
| 219 | Felmont Oil Corporation | Walnut Creek, CA 94596-3568 | Oil & Gas Operator | Feb 1990 |
| 220 | Felty Drilling Co. Inc | Burkburnett, TX 76354 | Oil & Gas Operator | Jul 2025 |
| 221 | Felty Production, Inc. | Burkburnett, TX 76354 | Oil Operator | Jul 2025 |
| 222 | Felty, F. T. Operating Company | Burkburnett, TX 76354 | Oil & Gas Operator | Jul 2018 |
| 223 | Femco Services Inc | Lindsay, OK 73052-0632 | Oil & Gas Operator | Nov 2006 |
| 224 | Femco SWD Inc | Enid, OK 73702-3907 | Oil Operator | Mar 2014 |
| 225 | Fender Expl & Prod Co., L.L.C. | Tyler, TX 75710 | Oil & Gas Operator | Sep 2004 |
| 226 | Fender, Mildred A. | Russell, KS 67665 | Oil & Gas Operator | Jun 2000 |
| 227 | Fenix Petroleum Group LLC | Washington, TX 77880 | Oil Operator | Jul 2019 |
| 228 | Fenn, Bill Inc. | Giddings, TX 78942 | Oil & Gas Operator | Mar 2008 |
| 229 | Fenno, Tom Prod. | FT Collins, CO 80524 | Oil & Gas Operator | Mar 2018 |
| 230 | Fenoglio Energy Production, LLC | Nocona, TX 76255 | Oil Operator | Jul 2025 |
| 231 | Fenoglio Oil Company | Nocona, TX 76255 | Oil Operator | Jul 2025 |
| 232 | Fenoglio, Donnie Oil Company | Nocona, TX 76255 | Oil & Gas Operator | Feb 2014 |
| 233 | Fenway Energy Development Co. | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 234 | Ferenbaugh Albert & Denise | Danville, OH 43014 | Oil & Gas Operator | Dec 2024 |
| 235 | Fergus Oil & Gas, LLC | Allen, TX 75013 | Oil Operator | Jul 2025 |
| 236 | Ferguson & Bosworth | | Oil & Gas Operator | May 2007 |
| 237 | Ferguson Bob | Casper, WY 82605 | Oil Operator | May 2004 |
| 238 | Ferguson Energy Inc | Evanston, WY 82930 | Oil & Gas Operator | Mar 2025 |
| 239 | Ferguson Oil & Gas Inc. | Austin, TX 78746 | Oil & Gas Operator | Jul 2025 |
| 240 | Ferguson Oil Company Inc | | Oil & Gas Operator | Apr 1994 |
| 241 | Ferguson Orval L | | Oil & Gas Operator | Oct 1983 |
| 242 | Ferguson, S. M. Jr., Inc. | Dallas, TX 75218 | Oil & Gas Operator | Jul 2025 |
| 243 | Ferguson-Burns Leasing Co. | Rockdale, TX 76567 | Oil & Gas Operator | Oct 2007 |
| 244 | Ferguson-Hunter Explor Inc | N Little Rock, AR 72120-1667 | Oil & Gas Operator | Aug 2016 |
| 245 | Fernwood Corporation | | Oil Operator | Dec 1986 |
| 246 | Ferraro Energy Corporation | Oklahoma City, OK 73114-6629 | Oil & Gas Operator | Aug 2013 |
| 247 | Ferreira Oil Properties LLC | Carefree, AZ 85377 | Oil Operator | Apr 2014 |
| 248 | Ferrell Gas Co. | | Gas Operator | Dec 1977 |
| 249 | Ferris, Wakyn W. | Denver, CO 80202 | Oil Operator | Jun 1988 |
| 250 | Ferry Lake Oil Co. | | Oil & Gas Operator | Jan 2025 |
| 251 | Fesco, LTD. | Alice, TX 78332 | Oil Operator | Jul 2025 |
| 252 | Fetterman Samuel C SR | Rossiter, PA 15772 | Gas Operator | Dec 2022 |
| 253 | Fewins, Gary D. | Moran, KS 66755 | Oil Operator | Jul 2019 |
| 254 | FF&N Oil Company | Spearsville, LA 71277 | Oil Operator | Jul 2024 |
| 255 | Ffa Petroleum Services | Victoria, TX 77903 | Oil & Gas Operator | Sep 2001 |
| 256 | Ffa Petroleum Services, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Feb 2018 |
| 257 | FG III LLC | Colleyville, TX 76034-4963 | Oil & Gas Operator | Apr 2018 |
| 258 | FGB Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2017 |
| 259 | FGS Energy LLC | Duncan, OK 73533-1829 | Oil & Gas Operator | Apr 2025 |
| 260 | FH Operation Company, Inc. | Dallas, TX 75381 | Oil & Gas Operator | Apr 2005 |
| 261 | FH Petroleum Corp. | Billings, MT 59103 | Oil & Gas Operator | May 2025 |
| 262 | Fha Investments LLC | Cushing, OK 74023 | Oil & Gas Operator | Apr 2025 |
| 263 | Fha Operating LLC | Cushing, OK 74023-1030 | Oil & Gas Operator | Nov 2024 |
| 264 | Fi-Ro Corporation | Natchez, MS BADADDR | Oil & Gas Operator | Nov 2001 |
| 265 | Fidelity E&P Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2016 |
| 266 | Fidelity Energy Co. | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2008 |
| 267 | Fidelity Energy, Inc. | Houston, TX 77055 | Oil & Gas Operator | Dec 2009 |
| 268 | Fidelity Explor. & Prod. Co. | Denver, CO 80202 | Oil & Gas Operator | Nov 2015 |
| 269 | Fidelity Exploration & Production Company | Denver, CO 80203 | Oil & Gas Operator | Jun 2025 |
| 270 | Fidelity Petroleum Corporation | Plano, TX 75074 | Oil & Gas Operator | Jul 2025 |
| 271 | Fidgets Energy LLC | Checotah, OK 74426-5309 | Oil Operator | Oct 2024 |
| 272 | Field Petroleum Corp. | San Antonio, TX 78216 | Oil & Gas Operator | Jul 2025 |
| 273 | Field Production Company | Cleburne, TX 76033 | Oil & Gas Operator | Mar 2023 |
| 274 | Field Service, Inc. | West Seneca, NY 14206 | Gas Operator | Dec 2024 |
| 275 | Fields Exploration, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Aug 2015 |
| 276 | Fields Oil & Gas Company, LLC | Dallas, TX 75230 | Oil & Gas Operator | Jul 2025 |
| 277 | Fields, Bert, Jr. | Dallas, TX 75230 | Oil & Gas Operator | Apr 2015 |
| 278 | Fieldstone Exploration Company | | Oil & Gas Operator | Jan 2007 |
| 279 | Fieldwood Energy LLC | Houston, TX 77042 | Oil & Gas Operator | Dec 2024 |
| 280 | Fieldwood Energy Offshore LLC | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 281 | Fieldwood Onshore LLC | Houston, TX 77098 | Oil & Gas Operator | Jul 2025 |
| 282 | Fiesta Energy LLC | Midland, TX 79705 | Oil & Gas Operator | Jul 2025 |
| 283 | Fife Oil & Gas | | Oil Operator | Oct 1987 |
| 284 | Fife Oil & Gas, Inc. | | Oil Operator | Mar 1991 |
| 285 | Fife Oil Company, Inc. | | Oil & Gas Operator | Feb 2008 |
| 286 | Fifth Creek Energy Operating Company LLC | | Oil & Gas Operator | Mar 2018 |
| 287 | Fifty Third Corp. & K.M.O.C. | | Gas Operator | Jul 1994 |
| 288 | Fifty-Third Corporation | | Gas Operator | Jul 1994 |
| 289 | Figgie Natural Resources | Wickliffe, OH 44092 | Oil & Gas Operator | Oct 1995 |
| 290 | Figure 3 Operating LLC | Tyler, TX 75703 | Oil Operator | Dec 2024 |
| 291 | Filco Incorporated | | Oil & Gas Operator | May 2025 |
| 292 | Fiml Natural Resources LLC (FNR) | Denver, CO 80202-4438 | Oil & Gas Operator | Jul 2014 |
| 293 | Fiml Natural Resources, LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2014 |
| 294 | Fin Energy, LLC | Wichita Falls, TX 76308 | Oil Operator | Jul 2025 |
| 295 | Fin-Oil, Inc. | | Oil & Gas Operator | Apr 1985 |
| 296 | Fina Oil & Chemi | | Oil & Gas Operator | Oct 1995 |
| 297 | Fina Oil & Chemical | Midland, TX 797022455 | Oil & Gas Operator | Apr 1999 |
| 298 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 299 | Fina Oil& Chem Co/Marathon Oil | | Oil & Gas Operator | Dec 1992 |
| 300 | Finaly Resources LLC | Sunset Beach, CA 90742 | Oil & Gas Operator | Jul 2025 |