| 401 | James C. Thomas III | | Oil & Gas Operator | Dec 1989 |
| 402 | James Drilling Co., Inc. | | Oil & Gas Operator | Dec 2024 |
| 403 | James Drilling Corp | Blairsville, PA 15717 | Oil & Gas Operator | Dec 2004 |
| 404 | James E Mead Mead Oil Co | Sheffield, PA 16347-0667 | Oil & Gas Operator | Dec 2011 |
| 405 | James E. Schulte | | Oil Operator | Apr 2008 |
| 406 | James Energy Company | Okmulgee, OK 74447-0275 | Oil & Gas Operator | May 2013 |
| 407 | James Energy Corporation | Houston, TX 77227 | Oil & Gas Operator | Jan 1996 |
| 408 | James Exploration, Inc. | | Gas Operator | Feb 1999 |
| 409 | James Johnny | Sapulpa, OK 74066 | Oil & Gas Operator | May 2025 |
| 410 | James K. Anderson, Inc. | | Oil Operator | Dec 1999 |
| 411 | James L Barber | | Oil Operator | Aug 1996 |
| 412 | James L Evans | Eunice, NM 88231 | Oil & Gas Operator | Dec 2001 |
| 413 | James L Ludwick | Farmington, NM 87499 | Gas Operator | Jul 2006 |
| 414 | James L. Boyter | | Oil Operator | Mar 1999 |
| 415 | James Larry | Guthrie, OK 73044-9622 | Oil & Gas Operator | May 2025 |
| 416 | James Lawrence E Estate Of | Crescent, OK 73028-9304 | Oil & Gas Operator | Nov 2021 |
| 417 | James M. Cunningham, Inc. | | Oil & Gas Operator | Feb 2004 |
| 418 | James M. Forgotson | | Oil & Gas Operator | Jan 1984 |
| 419 | James Marshall Jones | | Oil Operator | Sep 1997 |
| 420 | James N Evans | Eunice, NM 88231 | Oil & Gas Operator | Sep 1997 |
| 421 | James Oil Company | Compton, CA 90221-4399 | Oil & Gas Operator | Nov 2008 |
| 422 | James Operating | Iowa Park, TX 76367 | Oil & Gas Operator | Sep 2025 |
| 423 | James P. Hardey | | Oil Operator | Jul 2003 |
| 424 | James P. Williams Enterprises, Inc. | Palco, KS 67657 | Oil Operator | Apr 2025 |
| 425 | James Petroleum Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2014 |
| 426 | James Production, Inc. | Yates Center, KS 66783 | Oil Operator | Feb 2025 |
| 427 | James R Bernhardt Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2024 |
| 428 | James R Smail Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2020 |
| 429 | James R. McFarland | | Oil & Gas Operator | Jul 1997 |
| 430 | James Raymond L | Sapulpa, OK 74066-8785 | Oil & Gas Operator | Jun 2025 |
| 431 | James S. Anderson | | Oil & Gas Operator | Jul 2025 |
| 432 | James Sherman & Dennis Weese | | Oil & Gas Operator | Jun 2025 |
| 433 | James W. Briggs | | Oil Operator | Aug 1999 |
| 434 | James W. Collins Oil Operations | | Oil Operator | Dec 2009 |
| 435 | James Wray Inc | Utica, OH 43080 | Oil & Gas Operator | Dec 2024 |
| 436 | James, Deryl | Nocona, TX 76255 | Oil & Gas Operator | Sep 2025 |
| 437 | James, J. W. | Somerset, TX 78069 | Oil & Gas Operator | Aug 2004 |
| 438 | Jamestown Plastics, Inc. | Brockton, NY 14706 | Gas Operator | Dec 2024 |
| 439 | Jamex II LTD., L.L.P. | Dallas, TX 75252 | Oil & Gas Operator | Sep 2002 |
| 440 | Jamex, Inc. | Lewisville, TX 75067 | Oil & Gas Operator | Sep 2025 |
| 441 | Jamie Oil, Inc | Hot Springs, AR 71913 | Oil Operator | Dec 2024 |
| 442 | Jan Oil Company | Oklahoma City, OK 73156 | Oil & Gas Operator | May 2006 |
| 443 | Jan-Mar Oil Company Inc. | | Oil & Gas Operator | Jan 2025 |
| 444 | Janco Well Operation | Canton, OH 44735 | Oil & Gas Operator | Dec 1993 |
| 445 | Jandar Exploration | Henderson, TX 75653 | Oil & Gas Operator | Dec 1994 |
| 446 | Jandar Exploration, L. C. | Tyler, TX 75703 | Oil & Gas Operator | Sep 2025 |
| 447 | Jandie Oil Compa | | Oil Operator | Jul 1990 |
| 448 | Janes, Richard & Sandy | Columbia, KY 42728 | Oil Operator | Dec 2023 |
| 449 | Janet Lynn Gas Company | Milton, WV 25541-0000 | Gas Operator | Dec 2021 |
| 450 | Janex Oil Co., Inc. | Dallas, TX 75219 | Oil & Gas Operator | Jun 2005 |
| 451 | Janssen, Nelson | Victoria, TX 77904 | Oil & Gas Operator | Sep 2025 |
| 452 | Janssen, Wayne Allen | Runge, TX 78151 | Oil & Gas Operator | May 2010 |
| 453 | Jantz & Associat | | Oil & Gas Operator | Feb 1991 |
| 454 | January Investments LLC | Norman, OK 73069-8224 | Oil & Gas Operator | Jun 2025 |
| 455 | Janusz, Joseph | Auburn, NY 13021 | Gas Operator | Dec 2024 |
| 456 | Jap Oil Corporation | Levelland, TX 79336 | Oil & Gas Operator | May 1994 |
| 457 | Japex (U.S.) Corp. | | Oil & Gas Operator | May 1998 |
| 458 | Jaquess W D "Bud" | Ada, OK 74820 | Oil & Gas Operator | Jan 2018 |
| 459 | Jaraco Energy | Cross Plains, TX 76443 | Oil & Gas Operator | Jun 2005 |
| 460 | Jare Holdings LLC | Wooster, OH 44691 | Oil Operator | Dec 2021 |
| 461 | Jaroslawsky, William J. And Cari L. | Marilla, NY 14102 | Gas Operator | Dec 2024 |
| 462 | Jarutowicz Oil Company | Floresville, TX 78114 | Oil & Gas Operator | Sep 2025 |
| 463 | Jarvis Drilling, Inc. | MT Zion, IL 62549 | Oil & Gas Operator | Dec 2023 |
| 464 | Jas Oil Company | Winfield, KS 67156 | Oil & Gas Operator | Dec 1995 |
| 465 | Jas Tube Well Holding LLC | Kilgore, TX 75663-3711 | Oil & Gas Operator | May 2020 |
| 466 | Jasmar Oil Co. | Levelland, TX 79336 | Oil & Gas Operator | Mar 2008 |
| 467 | Jasmine Inc | Duncan, OK 73534-1103 | Oil & Gas Operator | Jun 2017 |
| 468 | Jason Oil Compan | | Oil Operator | Sep 1992 |
| 469 | Jason Oil Company | | Oil Operator | Dec 2014 |
| 470 | Jason Oil Company, LLC | Russell, KS 67665 | Oil Operator | Apr 2025 |
| 471 | Jason Petroleum Corporation | Tulsa, OK 74170-0622 | Oil & Gas Operator | Dec 1998 |
| 472 | Jaspar Co. | Hays, KS 67601 | Oil Operator | Apr 2025 |
| 473 | Jasper Energy, Incorporated | Decatur, TX 76234 | Oil Operator | Sep 2025 |
| 474 | Jasper Oil LLC | Bristow, OK 74010-3907 | Oil & Gas Operator | May 2025 |
| 475 | Jasper Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Jun 2002 |
| 476 | Jasper Resources, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 1996 |
| 477 | Jatam Inc. | Sterling City, TX 76951 | Oil & Gas Operator | Sep 2025 |
| 478 | Jaten Oil Co. | Amarillo, TX 79105 | Oil & Gas Operator | Apr 1993 |
| 479 | Javelin Energy Partners Management, LLC | Irving, TX 75038 | Oil & Gas Operator | Sep 2025 |
| 480 | Javernick Oil | | Oil Operator | Jul 2025 |
| 481 | Jaw Oil Co. | Amarillo, TX 79101 | Oil & Gas Operator | Jan 1997 |
| 482 | Jaxco Energy, A General Partnership | Garnett, KS 66032 | Oil Operator | Apr 2025 |
| 483 | Jaxploration Company L.C. | Andrews, TX 79714 | Oil & Gas Operator | Dec 1995 |
| 484 | Jay B Harden | | Oil Operator | May 2025 |
| 485 | Jay Bee Production | Walhonding, OH 43843 | Oil & Gas Operator | Dec 2023 |
| 486 | Jay Boy Oil Inco | | Oil & Gas Operator | May 1992 |
| 487 | Jay C. Boyer Oil | | Oil Operator | Nov 2009 |
| 488 | Jay Dee Oil | Garland, TX 75041 | Oil & Gas Operator | Sep 2025 |
| 489 | Jay Development Corp. | Dallas, TX 75420 | Oil & Gas Operator | Jun 1992 |
| 490 | Jay Energy Corporation | Dallas, TX 75240 | Oil & Gas Operator | Jan 2007 |
| 491 | Jay M. Schendel, A General Partnership | Wellsville, KS 66092 | Oil Operator | Dec 2019 |
| 492 | Jay Management Company LLC | Houston, TX 77057 | Oil & Gas Operator | Sep 2025 |
| 493 | Jay Petroleum Inc | Oklahoma City, OK 73154-0526 | Oil & Gas Operator | Mar 2019 |
| 494 | Jay Resources Corporation | Houston, TX 77010 | Oil & Gas Operator | Feb 1998 |
| 495 | Jay-Bee Oil & Gas, Inc. | Jupiter, FL 33477 | Oil & Gas Operator | Dec 2021 |
| 496 | Jay-Dee Operating Company | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Aug 2000 |
| 497 | Jaybird Resources, LLC | Cuero, TX 77954 | Oil Operator | Sep 2025 |
| 498 | Jaycar Production LLC | Comanche, OK 73529-4670 | Oil Operator | Mar 2025 |
| 499 | Jayhawk Energy Inc. | Spokane, WA 99202 | Oil & Gas Operator | May 2016 |
| 500 | Jayhawk Exploration LLC | Frederickburg, TX 78624 | Oil Operator | Jul 2009 |