| 501 | Giant Explor & Prod Co | Farmington, NM 87499 | Oil & Gas Operator | Aug 1996 |
| 502 | Giant Exploratio | | Oil & Gas Operator | Aug 1992 |
| 503 | Giant Exploration & Prod Co | Farmington, NM 87499 | Oil & Gas Operator | Dec 2009 |
| 504 | Giant Holding, LLC | Tucson, AZ 85713 | Oil & Gas Operator | Mar 2025 |
| 505 | Giant NRG Co., LP | Dallas, TX 75230 | Oil & Gas Operator | Dec 2025 |
| 506 | Giant Operating LLC | Dallas, TX 75202 | Oil Operator | Dec 2013 |
| 507 | Giant Petroleum Corp | Jefferson, OH 44047 | Oil & Gas Operator | Dec 1990 |
| 508 | Gibbs Drilling Co. | Iraan, TX 79744 | Oil & Gas Operator | Mar 2008 |
| 509 | Gibbs Jr Charles E | Fort Worth, TX 76108-9418 | Oil & Gas Operator | Mar 2015 |
| 510 | Gibbs William | | Oil Operator | Feb 2000 |
| 511 | Gibbs, Loyd Leasing | Gainesville, TX 76240 | Oil & Gas Operator | Aug 2007 |
| 512 | Gibraltar Energy Co., Inc. & Richard H. Mason | | Gas Operator | Aug 1995 |
| 513 | Gibraltar Energy Company | | Oil & Gas Operator | Jul 2025 |
| 514 | Gibraltar Energy LLC | | Oil Operator | Aug 2025 |
| 515 | Gibraltar Petroleum Corporation | Mabank, TX 75147 | Oil & Gas Operator | Nov 2008 |
| 516 | Gibraltar Resources, Inc. | Dallas, TX 75374 | Oil & Gas Operator | Jul 1993 |
| 517 | Gibson C O | Boynton, OK 74422 | Oil Operator | May 2021 |
| 518 | Gibson Donald L | Boynton, OK 74422 | Oil Operator | Oct 2025 |
| 519 | Gibson H F Estate | Dallas, TX 75250 | Oil & Gas Operator | Jul 1995 |
| 520 | Gibson J W | | Oil & Gas Operator | Sep 1999 |
| 521 | Gibson Les | Welty, OK 74833 | Oil & Gas Operator | Oct 2025 |
| 522 | Gibson Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 1997 |
| 523 | Gideon Oil Operations | | Oil Operator | Jul 2025 |
| 524 | Gideon Operating | Coleman, TX 76834 | Oil & Gas Operator | Dec 2025 |
| 525 | Gideon Operating, LLC | Spokane, WA 99224 | Oil Operator | Dec 2025 |
| 526 | Gidoen Oil Company | Brookesmith, TX 76827 | Oil Operator | Dec 2025 |
| 527 | Giebel Petroleum LTD. | Midland, TX 79705 | Oil & Gas Operator | Jul 2019 |
| 528 | Giebler Oil Comp | | Oil Operator | Aug 1991 |
| 529 | Gier'S Farm Service, Inc. | Cherry Creek, NY 14723 | Gas Operator | Dec 2024 |
| 530 | Gierhart Exploration, Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Apr 1994 |
| 531 | Gifford Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Jul 2003 |
| 532 | Gil-John Oil Co. | Alamogordo, NM 88310 | Oil & Gas Operator | Jan 2009 |
| 533 | Gilbert Bates | Midland, TX 79708 | Gas Operator | Jan 2010 |
| 534 | Gilbert Development Company, Inc. | | Gas Operator | Dec 2020 |
| 535 | Gilbert Exploration Company Inc | Charleston, WV 25301 | Oil & Gas Operator | Dec 2023 |
| 536 | Gilbert Oil Co | Ravenna, OH 44266 | Oil & Gas Operator | Dec 1988 |
| 537 | Gilbert Oil Properties | Tulsa, OK 74105-3741 | Oil Operator | Oct 2025 |
| 538 | Gilbert Ralph | Coweta, OK 74429 | Oil Operator | Apr 2007 |
| 539 | Gilbert, A. A. | Shreveport, LA 71133 | Oil & Gas Operator | Mar 1997 |
| 540 | Gilbert, Edward L. | Rushford, NY 14777 | Gas Operator | Dec 2024 |
| 541 | Gilbert,A.A.TX Acct/Partnership | Shreveport, LA 71133 | Oil Operator | Dec 2025 |
| 542 | Gilbert-Stewart Operating LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 543 | Gilbreath Tank Trucks, Inc. | Whitesboro, TX 76273 | Oil Operator | Dec 2025 |
| 544 | Gilby Services LLC | Velma, OK 73491 | Oil & Gas Operator | Nov 2025 |
| 545 | Gilco Gas, Inc. | | Gas Operator | Dec 2008 |
| 546 | Gilco Oil Inc | Ada, OK 74820 | Oil & Gas Operator | May 2019 |
| 547 | Gildemeister, Carlos & Theresa | Rushford, NY 14777 | Gas Operator | Dec 2024 |
| 548 | Giles, Benjamin M. | Towanda, KS 67144 | Oil & Gas Operator | Oct 2016 |
| 549 | Gill Jet C Dba Jetco Inc | Okmulgee, OK 74447 | Oil & Gas Operator | Dec 2023 |
| 550 | Gill Oil Company, LP | White Oak, TX 75693 | Oil Operator | Dec 2025 |
| 551 | Gill Ranch Storage LLC | | Oil & Gas Operator | Nov 2025 |
| 552 | Gill-Mac Inc | Nowata, OK 74048 | Oil & Gas Operator | May 1993 |
| 553 | Gillam Chuck Oil | | Oil Operator | Sep 1993 |
| 554 | Gillespie Oil And Gas, LLC | Sterling, KS 67579 | Oil Operator | Sep 2025 |
| 555 | Gillespie Oil Inc | Midland, TX 79701 | Oil & Gas Operator | Feb 2001 |
| 556 | Gillespie Operating LLC | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 557 | Gillespie Well Service Co Inc | | Oil Operator | Apr 1981 |
| 558 | Gillham Oil & Gas Inc | Shawnee, OK 74801-3547 | Oil Operator | May 1997 |
| 559 | Gillham Paul | Maud, OK 74854 | Oil & Gas Operator | Apr 2023 |
| 560 | Gilliam Petroleum, LTD | | Oil & Gas Operator | Mar 2013 |
| 561 | Gilliam'S Aghorn Energy | Odessa, TX 79768 | Oil & Gas Operator | May 1997 |
| 562 | Gilliam, Frank | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 563 | Gilliland Gerald D | Dewey, OK 74029-1639 | Oil Operator | Mar 2015 |
| 564 | Gilliland Oil And Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Nov 2025 |
| 565 | Gilliland Robert E Estate Of | Dewey, OK 74029-3924 | Oil & Gas Operator | Jul 2001 |
| 566 | Gilliland, Anthony L. | Edwardsville, KS 66111 | Oil Operator | Sep 2025 |
| 567 | Gillispie, Inc. | Amarillo, TX 79159 | Gas Operator | Dec 2025 |
| 568 | Gillman, John | Independence, KS 67301 | Oil Operator | Sep 2007 |
| 569 | Gillring Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 1994 |
| 570 | Gilmore Oil & Gas | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 571 | Gilmore Oil And Gas Co | Austin, TX 78768-4729 | Oil & Gas Operator | Jan 1997 |
| 572 | Gilmore Tank Service | Chase, KS 67524 | Oil Operator | Apr 2005 |
| 573 | Gilmore, Jeff | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2009 |
| 574 | Gilmore, Leo Oil, Inc. | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 575 | Gilmour Academy Corp | Gates Mills, OH 44040 | Oil & Gas Operator | Dec 2024 |
| 576 | Gils Hot Oil Service | | Oil Operator | Jun 2022 |
| 577 | Gilster, Ralph R. III | Victoria, TX 77901 | Oil & Gas Operator | Jun 2004 |
| 578 | Gilstrap, Joel | Water Valley, TX 76958 | Oil & Gas Operator | Dec 2025 |
| 579 | Ginco Operating Co. | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2025 |
| 580 | Ginder, Caleb | York, NY 14482 | Gas Operator | Dec 2024 |
| 581 | Ginger Oil | | Oil Operator | Sep 2025 |
| 582 | Ginger Oil Company | | Oil & Gas Operator | Jun 2015 |
| 583 | Ginger Oil Company (A) | The Woodlands, TX 77380 | Oil & Gas Operator | Jan 2016 |
| 584 | Ginger Petroleum Company, Inc. | La Grange, TX 78945 | Oil & Gas Operator | Dec 2025 |
| 585 | Gingerich Mike | McConnelsville, OH 43756 | Oil & Gas Operator | Dec 2010 |
| 586 | Ginnings Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2025 |
| 587 | Ginsweet Operating, Inc. | Borger, TX 79007 | Gas Operator | Dec 2025 |
| 588 | Ginther Oil, Inc. | Russell, KS 67665 | Oil Operator | Nov 2019 |
| 589 | Giras, Daniel F. | Alden, NY 14004 | Gas Operator | Dec 2024 |
| 590 | Girouard Richard L | | Oil Operator | May 1985 |
| 591 | Gish & McBead | | Oil Operator | Jan 1989 |
| 592 | Gishco Petroleum, Inc. | | Oil & Gas Operator | Apr 1992 |
| 593 | Givens, Bret | Hutchinson, KS 67501 | Oil Operator | Aug 2025 |
| 594 | GK Production LLC | Perry, OK 73077 | Oil Operator | Jul 2025 |
| 595 | GKM Inc | | Oil & Gas Operator | Mar 1990 |
| 596 | GKM Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Oct 1991 |
| 597 | Gla Inc | Norman, OK 73070 | Oil & Gas Operator | Nov 2025 |
| 598 | Glacier Energy Corp | Bellevue, WA 98004 | Oil & Gas Operator | Dec 1991 |
| 599 | Glacier Minerals, LLC | The Woodlands, TX 77382 | Gas Operator | Nov 2025 |
| 600 | Glacier Park Company | Houston, TX 77252 | Oil & Gas Operator | Aug 2001 |