| 401 | Geodessa Corpora | | Oil Operator | Jul 1984 |
| 402 | Geodominion Petroleum | Corpus Chrsti, TX 78403 | Oil & Gas Operator | May 2012 |
| 403 | Geodynamics Oil & Gas, Inc | | Oil & Gas Operator | Feb 1983 |
| 404 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 405 | Geodyne Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 406 | Geoex Resources Inc | | Oil & Gas Operator | Jan 1997 |
| 407 | Geoex, Inc. | Williamson, WV 25661 | Oil & Gas Operator | Dec 2023 |
| 408 | Geolinear Co. | | Oil & Gas Operator | Jul 1996 |
| 409 | Geological & Engineering Consultants | | Oil & Gas Operator | Aug 2025 |
| 410 | Geomark Resources, L.L.C. | Lubbock, TX 79453 | Oil & Gas Operator | Dec 2025 |
| 411 | Geomeg Energy Operating Co., LLC | Aransas Pass, TX 78336 | Oil & Gas Operator | Dec 2025 |
| 412 | Geomeg Operating, LLC | Dripping SPGS, TX 78620 | Oil Operator | Nov 2010 |
| 413 | Geomet Operating Co., Inc. | | Gas Operator | Dec 2013 |
| 414 | Geonatural Resources, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 415 | Geopetra Partners, LLC | Dallas, TX 75231 | Oil & Gas Operator | Dec 2025 |
| 416 | Geopetro Inc | Worthington, OH 43085 | Oil & Gas Operator | Dec 1994 |
| 417 | Geopetro LLC | Worthington, OH 43085-2316 | Oil & Gas Operator | Sep 2025 |
| 418 | Geophysical Survey Company | Grand Junction, CO 81503-1296 | Oil & Gas Operator | Jan 1996 |
| 419 | Geoquest Energy Inc | Enid, OK 73706-0216 | Oil & Gas Operator | Nov 2015 |
| 420 | Georesources, Inc. | Williston, ND 58802-1505 | Oil & Gas Operator | Dec 2014 |
| 421 | George A. Haddad, Jr. | | Oil & Gas Operator | Mar 2000 |
| 422 | George A. Jones | | Oil & Gas Operator | Jan 2018 |
| 423 | George Barron | | Oil & Gas Operator | Jan 1998 |
| 424 | George Belchic, Jr. | | Oil Operator | Aug 2008 |
| 425 | George Cunyus, Trustee | | Oil Operator | Feb 1987 |
| 426 | George D. Hartfield Oil & Gas, Inc. | | Oil & Gas Operator | Dec 2024 |
| 427 | George E. Wise | | Oil Operator | Dec 1989 |
| 428 | George Energy, LLC | | Oil Operator | Dec 2024 |
| 429 | George H Fentress | Wheatridge, CO 80034 | Gas Operator | Jun 1999 |
| 430 | George H Russell Oil & Gas Investments Inc | Mustang, OK 73064 | Oil & Gas Operator | Oct 2023 |
| 431 | George Interests | Tyler, TX 75703 | Oil & Gas Operator | Jul 1995 |
| 432 | George J. Peckham Jr. | | Oil Operator | Dec 1999 |
| 433 | George Kahn Operating Co. & Robert W. Lee | | Oil & Gas Operator | Dec 2017 |
| 434 | George L Wilhite,SR. | | Oil Operator | Oct 1981 |
| 435 | George M. Bagley | | Oil Operator | Dec 2024 |
| 436 | George R Schurman | | Oil & Gas Operator | Oct 2015 |
| 437 | George R. Brown | | Oil & Gas Operator | Mar 1984 |
| 438 | George Tarver Operating Co., LLC | | Oil & Gas Operator | Dec 2024 |
| 439 | George Taylor & Sons Oil LLC | Ringling, OK 73456 | Oil Operator | Aug 2025 |
| 440 | George W Plant Drilling | Corning, OH 43730 | Oil Operator | Dec 2024 |
| 441 | George, Dale R. | Olathe, KS 66062 | Oil Operator | Dec 2007 |
| 442 | George, Jon & Suzan | Linwood, NY 14486 | Gas Operator | Dec 2024 |
| 443 | George, Mark | Leroy, KS 66857 | Oil Operator | Jun 2025 |
| 444 | Georgeanne & Thomas E Beresnyak | Home, PA 15747-6417 | Gas Operator | Dec 2018 |
| 445 | Georgetown Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 1995 |
| 446 | Georgetown Operating Company | Oklahoma City, OK 73113 | Oil & Gas Operator | Jun 2019 |
| 447 | Georgia-Pacific Corp. | Atlanta, GA 30348 | Gas Operator | May 1986 |
| 448 | Geoseis Inc | | Oil Operator | Oct 1988 |
| 449 | Geoson Oil Compa | | Oil Operator | Jun 1984 |
| 450 | Geosouthern Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2025 |
| 451 | Geosouthern Operating II, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2025 |
| 452 | Geostrat Inc. | Addison, TX 75001 | Oil & Gas Operator | Nov 2011 |
| 453 | Geostrata Inc | Chagrin Falls, OH 44022 | Oil & Gas Operator | Dec 1993 |
| 454 | Geosurveys, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 455 | Geotech Production Inc | Centennial, CO 80016 | Oil Operator | Apr 2011 |
| 456 | Geoterre Operating, L.L.C. | | Oil & Gas Operator | Sep 2025 |
| 457 | Geotrac Energy Corporation | Abilene, TX 79604 | Oil & Gas Operator | Jul 2000 |
| 458 | Gep Haynesville II, LLC | | Gas Operator | Dec 2024 |
| 459 | Gep Haynesville, LLC | | Gas Operator | Dec 2021 |
| 460 | Gepard Energy Inc | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2025 |
| 461 | Gerald C. Eddy | | Oil & Gas Operator | Oct 1987 |
| 462 | Gerald E Williams | | Oil Operator | Nov 1992 |
| 463 | Gerald Michaelis Oil | | Oil Operator | Jun 2025 |
| 464 | Gerber Energy Co | | Oil Operator | Apr 1995 |
| 465 | Gerber, Charles J. | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 466 | Gergen Homes Inc. | | Oil & Gas Operator | Dec 2006 |
| 467 | German Oil Company LLC | | Oil Operator | Jun 2025 |
| 468 | German Petroleum Company | Tulsa, OK 74169-1953 | Oil & Gas Operator | Oct 2009 |
| 469 | Germany Exploration Co | Carrollton, TX 75006 | Oil & Gas Operator | Nov 1986 |
| 470 | Germany Oil Company | Tulsa, OK 74135 | Oil & Gas Operator | Oct 2002 |
| 471 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 472 | Gernatt Asphalt Products, Inc. | Collins, NY 14034 | Gas Operator | Dec 2024 |
| 473 | Gernatt, Chad R & Amy | Collins, NY 14034 | Gas Operator | Dec 2024 |
| 474 | Geronimo Oil Co. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Mar 2008 |
| 475 | Gerry Thames | Tulsa, OK 74107 | Gas Operator | Mar 2008 |
| 476 | Gerry-Mac Oil, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 477 | Gerstenkorn Oil Production, A General Partnership | Independence, KS 67301 | Oil Operator | Apr 2025 |
| 478 | Gerstner, Joe | Ness City, KS 67560 | Oil Operator | Mar 2016 |
| 479 | Gerwan Oil Company | Oklahoma City, OK 73159 | Oil Operator | Mar 2011 |
| 480 | Get Pumping LLC | Drummond, OK 73735 | Oil & Gas Operator | Sep 2025 |
| 481 | Getty Oil Compan | | Oil & Gas Operator | Jun 1992 |
| 482 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 483 | Getty Oil Company & Bodcaw Co. | | Oil & Gas Operator | Oct 1979 |
| 484 | Getty Reserve Oil Inc | White Plains, NY 10650 | Oil & Gas Operator | Mar 2005 |
| 485 | Geurin Oil & Gas | Saint Jo, TX 76265 | Oil & Gas Operator | Oct 2022 |
| 486 | Geyer Brothers Equipment Company | Noble, OK 73068-8540 | Oil & Gas Operator | Mar 2011 |
| 487 | GFS Energy, Inc. | | Gas Operator | Dec 2016 |
| 488 | GGG Oil Co. | Cotulla, TX 78014 | Oil & Gas Operator | Feb 2006 |
| 489 | GGG Oil Company, LTD. | Cotulla, TX 78014 | Oil & Gas Operator | Dec 2025 |
| 490 | GGP Exploration, LTD. | Fort Worth, TX 76101 | Oil & Gas Operator | Dec 2025 |
| 491 | Gha Barnett, LLC | Irving, TX 75062 | Gas Operator | Dec 2025 |
| 492 | Ghent Inv, Inc | Lexington, KY 40588 | Oil & Gas Operator | Dec 2023 |
| 493 | GHK Company LLC (The) | Oklahoma City, OK 73118-1120 | Oil & Gas Operator | Apr 2018 |
| 494 | Ghost Road, LLC | Batson, TX 77519 | Oil Operator | Dec 2025 |
| 495 | GHS Energy Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 496 | Giant Energy Corp. | Dallas, TX 75230 | Oil & Gas Operator | Jul 2019 |
| 497 | Giant Explor & Prod Co | Farmington, NM 87499 | Oil & Gas Operator | Aug 1996 |
| 498 | Giant Exploratio | | Oil & Gas Operator | Aug 1992 |
| 499 | Giant Exploration & Prod Co | Farmington, NM 87499 | Oil & Gas Operator | Dec 2009 |
| 500 | Giant Holding, LLC | Tucson, AZ 85713 | Oil & Gas Operator | Mar 2025 |