| 10201 | First Source Gas, LP | Houston, TX 77010 | Gas Operator | Jan 2006 |
| 10202 | First Source Texas, Inc. | MT Pleasant, MI 48858 | Gas Operator | Nov 2004 |
| 10203 | First Sourcenergy Wyoming Inc | Gillette, WY 82718 | Gas Operator | Jul 2003 |
| 10204 | First South Energy Corp | Hartland, WI 53029 | Oil & Gas Operator | Dec 2014 |
| 10205 | First Texas Exploration Corp. | Arcadia, LA 71001 | Oil & Gas Operator | Aug 2003 |
| 10206 | First Zone Production | Salt Lake City, UT 84102 | Oil & Gas Operator | Dec 1997 |
| 10207 | Firstrike Energy Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Jan 2025 |
| 10208 | Fischer Operating Corporation | Victoria, TX 77902 | Oil & Gas Operator | Jan 1999 |
| 10209 | Fiscus Drilling Co., Inc. | Clyde, TX 79510 | Oil & Gas Operator | Apr 2015 |
| 10210 | Fishburn Producing Inc | Marengo, OH 43334 | Oil & Gas Operator | Dec 2024 |
| 10211 | Fishburn Services Inc | Marengo, OH 43334 | Oil & Gas Operator | Dec 1990 |
| 10212 | Fishcreek Minerals, LLC | Graham, TX 76450 | Oil & Gas Operator | Nov 2025 |
| 10213 | Fisher Ellis R | Bristow, OK 74010-8515 | Oil & Gas Operator | Dec 2015 |
| 10214 | Fisher Ernest B | Bristow, OK 74010 | Oil Operator | Jul 2024 |
| 10215 | Fisher Joint Venture | | Oil & Gas Operator | Oct 1998 |
| 10216 | Fisher McCall Oil And Gas Inc | | Oil Operator | Dec 2014 |
| 10217 | Fisher Oil Co. | Big Lake, TX 76932 | Oil & Gas Operator | Nov 2025 |
| 10218 | Fisher, Jack Inc. | Abilene, TX 79603 | Oil & Gas Operator | Sep 2001 |
| 10219 | Fisher, L. C. Jr. | Longview, TX 75608 | Oil & Gas Operator | May 1993 |
| 10220 | Fisk Family Farms LLC | | Gas Operator | Sep 2025 |
| 10221 | Fitch Petroleum Company Inc | Adair, OK 74330 | Oil Operator | Jul 2025 |
| 10222 | Fite Oil & Gas, Inc. | Shreveport, LA 71163 | Oil & Gas Operator | Nov 2025 |
| 10223 | Fitkin Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Jan 1994 |
| 10224 | Fitts, B.K. Oil & Gas | Bowie, TX 76230 | Oil & Gas Operator | Nov 2025 |
| 10225 | Fitzgerald Oil Company | Waurika, OK 73573 | Oil Operator | Jul 2025 |
| 10226 | Fitzgerald Production Co. | Oil City, LA 71061 | Oil & Gas Operator | Dec 2024 |
| 10227 | Fitzpatrick, Stephen | Angola, NY 14006 | Gas Operator | Dec 2024 |
| 10228 | Fitzsimmons Randall W & Deborah S | Bartelsville, OK 74006 | Oil & Gas Operator | Jun 2025 |
| 10229 | Five D Co | Cactus, TX 79013 | Oil & Gas Operator | Sep 1996 |
| 10230 | Five K Partnership | Graham, TX 76450 | Oil & Gas Operator | Oct 2023 |
| 10231 | Five Star Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Jul 2025 |
| 10232 | Five State Energy Co | Dallas, TX 75206 | Oil & Gas Operator | Oct 1995 |
| 10233 | Five States Energy Company | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 10234 | Five States Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Feb 2008 |
| 10235 | Five States Operating Company LLC | Dallas, TX 75206 | Oil & Gas Operator | Aug 2025 |
| 10236 | Five-Jab, Inc. | Tomball, TX 77377 | Oil & Gas Operator | Nov 2025 |
| 10237 | Fiveash Operating Company, Inc. | Christoval, TX 76935 | Oil & Gas Operator | Aug 2003 |
| 10238 | Fivestones Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Nov 2025 |
| 10239 | FJH Oil Company | Muenster, TX 76252 | Oil & Gas Operator | Nov 2025 |
| 10240 | Fjo Energy, LLC | Fairhope, AL 36532 | Oil Operator | Nov 2025 |
| 10241 | Flag DRLG Co, Inc | Greenville, KY 42345 | Oil & Gas Operator | Dec 2021 |
| 10242 | Flag Energy, LLC | Centerton, AR 72719 | Oil & Gas Operator | Nov 2018 |
| 10243 | Flag Transport Inc | Shattuck, OK 73858-0848 | Oil Operator | Dec 2014 |
| 10244 | Flag-Redfern Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Jul 2002 |
| 10245 | Flagin Operating LLC | Norman, OK 73072-2405 | Oil & Gas Operator | May 2025 |
| 10246 | Flahive Oil & Gas LLC | Golden, CO 80401 | Oil Operator | Oct 1995 |
| 10247 | Flairtex Resources, Inc. | Houston, TX 77040 | Oil & Gas Operator | Oct 1998 |
| 10248 | Flame Energy Co Inc | Dalton, OH 44618 | Oil & Gas Operator | Dec 2006 |
| 10249 | Flamingo Oil & Gas | Luling, TX 78648 | Oil & Gas Operator | Nov 2025 |
| 10250 | Flamingo Operating, LLC | Houston, TX 77084 | Oil & Gas Operator | Nov 2025 |
| 10251 | Flanagan Energy Company LLC | Walters, OK 73572 | Oil Operator | Feb 2025 |
| 10252 | Flanigan Bros | Edinboro, PA 16412-1443 | Oil & Gas Operator | Dec 2024 |
| 10253 | Flare Inc | | Oil & Gas Operator | Jul 1995 |
| 10254 | Flare Oil Inc | Rockport, TX 78382 | Oil & Gas Operator | Nov 2025 |
| 10255 | Flare Resources Inc. | Houston, TX 77002 | Gas Operator | Jun 2006 |
| 10256 | Flash Gas & Oil Northeast, Inc | | Oil & Gas Operator | May 2007 |
| 10257 | Flash Gas & Oil Southwest, Inc. | Mandeville, LA 70470 | Oil & Gas Operator | Oct 2019 |
| 10258 | Flash Gas & Oil, Inc. | | Oil & Gas Operator | May 1991 |
| 10259 | Flat Creek Operating Co. | Rockwall, TX 75087 | Oil & Gas Operator | Jun 2004 |
| 10260 | Flat Creek Resources, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2025 |
| 10261 | Flat Top Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Nov 2025 |
| 10262 | Flatiron Exploration LLC | Olean, NY 14760 | Oil & Gas Operator | Dec 2024 |
| 10263 | Flatirons Development LLC | Westminster, CO 80020-2771 | Gas Operator | Dec 2015 |
| 10264 | Flatirons Resources LLC | Westminster, CO 80021 | Oil & Gas Operator | Dec 2022 |
| 10265 | Flatland Energy, LLC | Gardner, KS 66030 | Oil Operator | Jun 2025 |
| 10266 | Flatland Oil Com | | Oil Operator | Sep 1985 |
| 10267 | Flatlander Energy LLC | Blackwell, OK 74631 | Oil & Gas Operator | Aug 2025 |
| 10268 | Flatlander Petroleum LLC | | Oil & Gas Operator | Jun 2025 |
| 10269 | Flatonia Energy, LLC | Dallas, TX 75201 | Oil & Gas Operator | Nov 2025 |
| 10270 | Flatrock Energy Co | | Oil & Gas Operator | May 2017 |
| 10271 | Flatt Energy Inc | | Oil & Gas Operator | Sep 2019 |
| 10272 | Flatwater Energy, LLC | | Oil & Gas Operator | Dec 2024 |
| 10273 | Flavian Oil Company | Dallas, TX 75206 | Gas Operator | Jan 1997 |
| 10274 | Fleeharty Willie W | | Oil & Gas Operator | Jun 1991 |
| 10275 | Fleeman Teresa R | Lower Salem, OH 45745 | Oil & Gas Operator | Dec 2024 |
| 10276 | Fleet Frank T | Ada, OK 74821-0729 | Oil & Gas Operator | Feb 2003 |
| 10277 | Fleet Oil Co. | | Oil & Gas Operator | Dec 1991 |
| 10278 | Fleetwood K Phil Oil Properties | Marlow, OK 73055 | Oil & Gas Operator | Jul 2025 |
| 10279 | Fletcher Oil LLC | Ratliff City, OK 73481 | Oil & Gas Operator | Aug 2025 |
| 10280 | Fletcher Operating Co. | | Oil & Gas Operator | May 1989 |
| 10281 | Fletcher Operating, LLC | Fairhope, AL 36532 | Oil & Gas Operator | Nov 2025 |
| 10282 | Fletcher Petroleum Corp. | Fairhope, AL 36533 | Oil & Gas Operator | Jul 2025 |
| 10283 | Fletcher, M. D. | Pampa, TX 79065 | Oil & Gas Operator | Dec 2007 |
| 10284 | Fleur David Corp | | Gas Operator | Jul 2001 |
| 10285 | Flex Energy, L.L.C. | | Oil & Gas Operator | Feb 2010 |
| 10286 | Flicka Energy Inc | Crescent, OK 73028 | Oil & Gas Operator | Mar 2022 |
| 10287 | Flint Douglas J | Mounds, OK 74047-5415 | Oil & Gas Operator | Sep 2015 |
| 10288 | Flint Equipment LLC | Cushing, OK 74023 | Oil Operator | Aug 2025 |
| 10289 | Flint Hills Production Co., Inc. | Gas City, KS 66742 | Oil Operator | Nov 2009 |
| 10290 | Flint Interests, LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2025 |
| 10291 | Flint J A & Associates | Holdenville, OK 74848 | Oil & Gas Operator | Sep 2009 |
| 10292 | Flint Oak Energy, LLC | Montgomery, TX 77356 | Oil & Gas Operator | Nov 2025 |
| 10293 | Flint Oil & Gas | San Angelo, TX 76904 | Oil & Gas Operator | Aug 2003 |
| 10294 | Flint Pipeline Company | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2025 |
| 10295 | Flint Rock Resources MGMNT, Inc. | Austin, TX 78734 | Oil & Gas Operator | Nov 2025 |
| 10296 | Flint, Billy Individual | Merkel, TX 79536 | Oil & Gas Operator | Nov 2025 |
| 10297 | Flintstone Energy, LLC | El Dorado, KS 67042 | Oil Operator | Jun 2020 |
| 10298 | Flo Petro, LLC. | Austin, TX 78746 | Oil Operator | Nov 2025 |
| 10299 | Floex Energy LLC | Tyler, TX 75701 | Oil Operator | Nov 2025 |
| 10300 | Flood Thirty Seven LLC | Dewey, OK 74029 | Oil Operator | Jun 2025 |