| 301 | Fiml Natural Resources LLC (FNR) | Denver, CO 80202-4438 | Oil & Gas Operator | Jul 2014 |
| 302 | Fiml Natural Resources, LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2014 |
| 303 | Fin Energy, LLC | Wichita Falls, TX 76308 | Oil Operator | Feb 2026 |
| 304 | Fin-Oil, Inc. | | Oil & Gas Operator | Apr 1985 |
| 305 | Fina Oil & Chemi | | Oil & Gas Operator | Oct 1995 |
| 306 | Fina Oil & Chemical | Midland, TX 797022455 | Oil & Gas Operator | Apr 1999 |
| 307 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 308 | Fina Oil& Chem Co/Marathon Oil | | Oil & Gas Operator | Dec 1992 |
| 309 | Finaly Resources LLC | Sunset Beach, CA 90742 | Oil & Gas Operator | Feb 2026 |
| 310 | Finch-Crestmont | Houston, TX 77027 | Oil & Gas Operator | Oct 2012 |
| 311 | Finck Oil & Gas Co | Junction City, OH 43748 | Oil & Gas Operator | Dec 2024 |
| 312 | Finders Co And Sullivan And Co | | Oil & Gas Operator | May 1987 |
| 313 | Finders Co The | | Oil & Gas Operator | Jan 1998 |
| 314 | Fine Jack | Pensacola, FL 32516 | Oil Operator | May 1995 |
| 315 | Finger Oil & Gas, Inc. | Castroville, TX 78009 | Oil & Gas Operator | May 2021 |
| 316 | Finish Thompson Inc | Erie, PA 16501-1525 | Gas Operator | Dec 2025 |
| 317 | Finkelstein, Jack, Trustee | Houston, TX 77027 | Oil & Gas Operator | Apr 2007 |
| 318 | Finlay Energy, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Jul 1999 |
| 319 | Finley Oil Compa | | Oil Operator | Oct 1992 |
| 320 | Finley Oil Company, LLC | Liberty, TX 77575 | Oil Operator | Feb 2026 |
| 321 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Feb 2026 |
| 322 | Finley, Billy D | Burkesville, KY 42717 | Oil Operator | Dec 2020 |
| 323 | Finnegan Gas Corp | Wind Ridge, PA 15380-1212 | Gas Operator | Dec 2019 |
| 324 | Finnell Oil Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2009 |
| 325 | Finnell Oil Services, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 326 | Finney Drilling Company | Wann, OK 74083-2314 | Oil Operator | Jul 2018 |
| 327 | Finney Kyler A Dba Finney Oil Co | Wann, OK 74083 | Oil Operator | Nov 2025 |
| 328 | Finney Oil Company | | Oil & Gas Operator | Sep 2025 |
| 329 | Finston Arthur | Tulsa, OK 74105-7183 | Oil & Gas Operator | Mar 2007 |
| 330 | Firebird Energy II LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Feb 2026 |
| 331 | Firebird Energy LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2022 |
| 332 | Firecreek Texas, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2015 |
| 333 | Firehouse Energy LLC | Morris, OK 74445 | Oil & Gas Operator | Mar 2024 |
| 334 | Firerock Company | Abilene, TX 79602 | Oil & Gas Operator | Feb 2026 |
| 335 | Fireside Oil And Gas, Inc. | West Monroe, LA 71294 | Oil & Gas Operator | Feb 2002 |
| 336 | Firestone Raymond C | Akron, OH 44313 | Oil & Gas Operator | Dec 2003 |
| 337 | Firestone Tire & Rubber | Akron, OH 44317 | Oil & Gas Operator | Dec 1989 |
| 338 | Firewater, Inc. | Hobbs, NM 88240 | Oil & Gas Operator | Dec 2011 |
| 339 | Firewheel Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2017 |
| 340 | Firey Oil Company | Sand Springs, OK 74063 | Oil & Gas Operator | Feb 2021 |
| 341 | First Alliance CH | Erie, PA 16506-5024 | Gas Operator | Dec 2017 |
| 342 | First Amer Energy Inc | Bradford, PA 16701-0184 | Oil & Gas Operator | Dec 2025 |
| 343 | First American Operating Co. | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2006 |
| 344 | First Aransas Reserves, Inc. | Alvin, TX 77511 | Oil & Gas Operator | Mar 2018 |
| 345 | First Ascent Operating LLC | Addison, TX 75001 | Oil Operator | Nov 2025 |
| 346 | First Chinese Baptist Church | | Oil Operator | Dec 2006 |
| 347 | First Energy Cor | | Oil Operator | Aug 1990 |
| 348 | First Energy Corporation | | Oil & Gas Operator | Jun 1993 |
| 349 | First Energy Development Corp. | | Oil & Gas Operator | Sep 2008 |
| 350 | First Energy Properties | Houston, TX 77060 | Oil & Gas Operator | Dec 1986 |
| 351 | First Hardin Corp. | Fulshear, TX 77441 | Oil & Gas Operator | Nov 1994 |
| 352 | First Liberty Energy Inc | Boca Raton, FL 33432-5942 | Oil & Gas Operator | Jul 2013 |
| 353 | First Light Operating, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Feb 2026 |
| 354 | First National Finance Corporation | | Oil Operator | Dec 1995 |
| 355 | First National O | | Oil & Gas Operator | Aug 1990 |
| 356 | First National Oil Inc | Edmond, OK 73003 | Oil & Gas Operator | Nov 2025 |
| 357 | First Natural Gas Inc | Checotah, OK 74426 | Oil & Gas Operator | Nov 2025 |
| 358 | First Oil And Gas Company | | Oil Operator | Nov 2025 |
| 359 | First Paragon Properties, L.L.C. | Alice, TX 78333 | Oil Operator | Feb 2026 |
| 360 | First Permian, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 361 | First Reserve Oil & Gas Co | Houston, TX 77002 | Oil & Gas Operator | Apr 2000 |
| 362 | First Rock, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Feb 2026 |
| 363 | First Solid Energy Group, LP | Missouri City, TX 77489 | Oil & Gas Operator | Feb 2026 |
| 364 | First Source Gas, LP | Houston, TX 77010 | Gas Operator | Jan 2006 |
| 365 | First Source Texas, Inc. | MT Pleasant, MI 48858 | Gas Operator | Nov 2004 |
| 366 | First Sourcenergy Wyoming Inc | Gillette, WY 82718 | Gas Operator | Jul 2003 |
| 367 | First South Energy Corp | Hartland, WI 53029 | Oil & Gas Operator | Dec 2014 |
| 368 | First Texas Exploration Corp. | Arcadia, LA 71001 | Oil & Gas Operator | Aug 2003 |
| 369 | First Zone Production | Salt Lake City, UT 84102 | Oil & Gas Operator | Dec 1997 |
| 370 | Firstrike Energy Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Jan 2025 |
| 371 | Fischer Operating Corporation | Victoria, TX 77902 | Oil & Gas Operator | Jan 1999 |
| 372 | Fiscus Drilling Co., Inc. | Clyde, TX 79510 | Oil & Gas Operator | Apr 2015 |
| 373 | Fishburn Producing Inc | Marengo, OH 43334 | Oil & Gas Operator | Dec 2024 |
| 374 | Fishburn Services Inc | Marengo, OH 43334 | Oil & Gas Operator | Dec 1990 |
| 375 | Fishcreek Minerals, LLC | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 376 | Fisher Ellis R | Bristow, OK 74010-8515 | Oil & Gas Operator | Dec 2015 |
| 377 | Fisher Ernest B | Bristow, OK 74010 | Oil Operator | Jul 2024 |
| 378 | Fisher Joint Venture | | Oil & Gas Operator | Oct 1998 |
| 379 | Fisher McCall Oil And Gas Inc | | Oil Operator | Dec 2014 |
| 380 | Fisher Oil Co. | Big Lake, TX 76932 | Oil & Gas Operator | Feb 2026 |
| 381 | Fisher, Jack Inc. | Abilene, TX 79603 | Oil & Gas Operator | Sep 2001 |
| 382 | Fisher, L. C. Jr. | Longview, TX 75608 | Oil & Gas Operator | May 1993 |
| 383 | Fisk Family Farms LLC | | Gas Operator | Dec 2025 |
| 384 | Fitch Petroleum Company Inc | Adair, OK 74330 | Oil Operator | Aug 2025 |
| 385 | Fite Oil & Gas, Inc. | Shreveport, LA 71163 | Oil & Gas Operator | Feb 2026 |
| 386 | Fitkin Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Jan 1994 |
| 387 | Fitts, B.K. Oil & Gas | Bowie, TX 76230 | Oil & Gas Operator | Feb 2026 |
| 388 | Fitzgerald Oil Company | Waurika, OK 73573 | Oil Operator | Dec 2025 |
| 389 | Fitzgerald Production Co. | Oil City, LA 71061 | Oil & Gas Operator | Dec 2024 |
| 390 | Fitzpatrick, Stephen | Angola, NY 14006 | Gas Operator | Dec 2024 |
| 391 | Fitzsimmons Randall W & Deborah S | Bartelsville, OK 74006 | Oil & Gas Operator | Dec 2025 |
| 392 | Five D Co | Cactus, TX 79013 | Oil & Gas Operator | Sep 1996 |
| 393 | Five K Partnership | Graham, TX 76450 | Oil & Gas Operator | Oct 2023 |
| 394 | Five Star Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Nov 2025 |
| 395 | Five State Energy Co | Dallas, TX 75206 | Oil & Gas Operator | Oct 1995 |
| 396 | Five States Energy Company | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 397 | Five States Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Feb 2008 |
| 398 | Five States Operating Company LLC | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 399 | Five-Jab, Inc. | Tomball, TX 77377 | Oil & Gas Operator | Feb 2026 |
| 400 | Fiveash Operating Company, Inc. | Christoval, TX 76935 | Oil & Gas Operator | Aug 2003 |