| 501 | Jay Petroleum Inc | Oklahoma City, OK 73154-0526 | Oil & Gas Operator | Mar 2019 |
| 502 | Jay Resources Corporation | Houston, TX 77010 | Oil & Gas Operator | Feb 1998 |
| 503 | Jay-Bee Oil & Gas, Inc. | Jupiter, FL 33477 | Oil & Gas Operator | Dec 2021 |
| 504 | Jay-Dee Operating Company | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Aug 2000 |
| 505 | Jaybird Operating, LLC | Houston, TX 77057 | Oil Operator | Dec 2025 |
| 506 | Jaybird Resources, LLC | Cuero, TX 77954 | Oil Operator | Dec 2025 |
| 507 | Jaycar Production LLC | Comanche, OK 73529-4670 | Oil Operator | Nov 2025 |
| 508 | Jayhawk Energy, Inc. | Spokane, WA 99202 | Oil & Gas Operator | May 2016 |
| 509 | Jayhawk Exploration LLC | Frederickburg, TX 78624 | Oil Operator | Jul 2009 |
| 510 | Jayhawk Mineral Investments LLC | Edmond, OK 73034-8874 | Oil & Gas Operator | Oct 2025 |
| 511 | Jayne Morton Living Trust | Troup, TX 75789 | Oil Operator | Jul 2023 |
| 512 | Jayson David Company | Seward, KS 67576 | Oil Operator | Apr 2009 |
| 513 | JB & K, L.L.C. | | Oil Operator | Jan 2025 |
| 514 | JB Oil & Gas Well Service | Dilley, TX 78017 | Oil & Gas Operator | Dec 2025 |
| 515 | JB Petroleum Corporation | Purcell, OK 73080-6954 | Oil & Gas Operator | Sep 2018 |
| 516 | JB Production Company | Denton, TX 76202 | Oil & Gas Operator | Jul 2004 |
| 517 | JB Production LLC | Benbrook, TX 76126 | Oil Operator | Jun 2024 |
| 518 | JB Smith Operating Co LLC | Duncan, OK 73533-4618 | Oil Operator | Nov 2025 |
| 519 | JBC Operating LLC | Foyil, OK 74031-0310 | Oil & Gas Operator | Jul 2016 |
| 520 | JBD Oklahoma, L.L.C. | | Oil & Gas Operator | Oct 2025 |
| 521 | JBG Oil & Gas Company LLC | Ashland, KS 67831 | Oil & Gas Operator | Jul 2025 |
| 522 | JBM Oil, LLC | Ottawa, KS 66067 | Oil Operator | Dec 2019 |
| 523 | JC Bear Operating LLC | Corpus Chrsti, TX 78414 | Oil & Gas Operator | Dec 2025 |
| 524 | JC Enterprises | Andrews, TX 79714 | Oil & Gas Operator | Jun 2012 |
| 525 | Jca Oil Co. | Houston, TX 77035 | Oil Operator | Dec 2025 |
| 526 | JCB II Enterprises LLC | Perryton, TX 79070 | Oil & Gas Operator | Jun 2023 |
| 527 | JCC Energy, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2025 |
| 528 | JCN Petroleum Corporation | Edmond, OK 73083-3357 | Oil & Gas Operator | Jun 2004 |
| 529 | JCR Petroleum, Inc. | Navarre, OH 44662-0000 | Oil & Gas Operator | Dec 2013 |
| 530 | JCR, Jr - Operating, Inc. | Amarillo, TX 79114 | Oil & Gas Operator | Apr 2022 |
| 531 | JCS Company | Graham, TX 76450 | Oil & Gas Operator | May 2001 |
| 532 | JCS Operating LLC | Guymon, OK 73942 | Oil & Gas Operator | Oct 2025 |
| 533 | JCT #1 LTD | Fairview, OK 73737-9614 | Oil Operator | Sep 2006 |
| 534 | JCTJ Energy LLC | Asher, OK 74826 | Oil & Gas Operator | Oct 2025 |
| 535 | JD Oil Company | Longview, TX 75605 | Oil & Gas Operator | Sep 2014 |
| 536 | JD Operating | Eastland, TX 76448 | Oil & Gas Operator | Dec 2025 |
| 537 | JD Producing Inc | Burbank, OH 44214 | Oil & Gas Operator | Dec 2012 |
| 538 | JD Production Co | Waco, TX 76702 | Oil & Gas Operator | Dec 2009 |
| 539 | Jda Energy, LLC | Pasadena, TX 77505 | Oil & Gas Operator | Dec 2025 |
| 540 | JDL Operating, LLC | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 541 | Je Energy Partners, LLC | Alice, TX 78333 | Oil Operator | Dec 2025 |
| 542 | Jean Martinez | | Oil Operator | Oct 2025 |
| 543 | Jeanie Enterprises LLC | Somerset, OH 43783 | Oil & Gas Operator | Dec 2024 |
| 544 | Jeanie Oil Inc | Drumright, OK 74023 | Oil & Gas Operator | Feb 1999 |
| 545 | Jeanne E. Nevins | | Oil Operator | Dec 2000 |
| 546 | Jeans Well Service | | Gas Operator | Dec 1985 |
| 547 | Jeau Mar Limited Inc | Tulsa, OK 74114 | Oil & Gas Operator | Jul 1996 |
| 548 | Jebco Ogm Resources, Inc. | Jamestown, NY 14701 | Gas Operator | Dec 2024 |
| 549 | Jebito Farm LLC | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Oct 2025 |
| 550 | Jec Operating LLC | Oklahoma City, OK 73114-2717 | Oil & Gas Operator | Oct 2025 |
| 551 | Jed Oil USA Inc | | Oil & Gas Operator | Dec 2008 |
| 552 | Jeda Kini Production Co LLC | Hays, KS 67601-3659 | Oil & Gas Operator | Mar 2008 |
| 553 | Jedaco Inc | | Gas Operator | May 2013 |
| 554 | Jedona Energy, LLC | | Oil Operator | Apr 2004 |
| 555 | Jeems Bayou Production Corp. | Oil City, LA 71061 | Oil & Gas Operator | Dec 2025 |
| 556 | Jeff Dooley Operating, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 557 | Jeff Jensen Properties Inc | | Oil & Gas Operator | Mar 2014 |
| 558 | Jeff M. Hicks | | Oil & Gas Operator | May 1992 |
| 559 | Jeff'S Oilwell Supervision | | Oil Operator | Jul 2025 |
| 560 | Jeffcoat Production Company Inc. | Spurger, TX 77660 | Oil & Gas Operator | Oct 2024 |
| 561 | Jeffers & Bolinger | Burkburnett, TX 76354 | Oil & Gas Operator | Sep 1995 |
| 562 | Jeffers Drilling Co. | Burkburnett, TX 76354 | Oil & Gas Operator | Feb 2001 |
| 563 | Jefferson Block 24 Oil & Gas LLC | Dallas, TX 75287 | Oil & Gas Operator | Dec 2025 |
| 564 | Jefferson Co LLC (The) | Corinth, TX 76205 | Oil & Gas Operator | Aug 2004 |
| 565 | Jefferson Oil & Gas Company | Pickerington, OH 43147 | Oil & Gas Operator | Dec 2024 |
| 566 | Jeffery Energy Corporation | Meade, KS 67864 | Gas Operator | Dec 2019 |
| 567 | Jeffery Lynch Production | | Oil Operator | Jan 2025 |
| 568 | Jeffries Keith E Dba Lady Bug Oil Company | Blackwell, OK 74631-0389 | Oil & Gas Operator | Mar 2019 |
| 569 | Jeffries Pumping Service Inc | Guthrie, OK 73044-8761 | Oil & Gas Operator | Nov 2025 |
| 570 | Jeffries, Peter | Leawood, KS 66224 | Oil Operator | Aug 2021 |
| 571 | Jegeroil Corp | New York, NY 10036 | Oil & Gas Operator | Aug 2000 |
| 572 | Jel Resources LLC | Castle Rock, CO 80109 | Oil & Gas Operator | Sep 2025 |
| 573 | Jellco LLC | Thermopolis, WY 82443 | Oil Operator | Nov 2025 |
| 574 | Jem Petroleum Corporation | | Oil & Gas Operator | Jun 1983 |
| 575 | Jen Oil & Gas | | Oil & Gas Operator | Feb 2006 |
| 576 | Jen-Oil, Inc. | | Oil Operator | Aug 1999 |
| 577 | Jena Operating Company, Inc. | Dallas, TX 75367 | Oil & Gas Operator | May 2007 |
| 578 | Jenco Petroleum Corporation | The Woodlands, TX 77380 | Oil Operator | Dec 2025 |
| 579 | Jenco Resources, Inc. | | Oil & Gas Operator | Aug 2009 |
| 580 | Jenex Operating Company | The Woodlands, TX 77380-164280209 | Oil & Gas Operator | May 2019 |
| 581 | Jenex Operating Company Of Texas | Denver, CO 80209 | Oil & Gas Operator | Aug 2003 |
| 582 | Jenex Petroleum Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2025 |
| 583 | Jenkins & Archer | Paintsville, KY 41240 | Gas Operator | Dec 2018 |
| 584 | Jenkins & Broyle | | Oil & Gas Operator | Sep 1991 |
| 585 | Jenkins & Broyles Production Company | | Oil Operator | Dec 2006 |
| 586 | Jenkins & Sons Production Inc | Arkansas City, KS 67005 | Oil Operator | Jul 2014 |
| 587 | Jenkins Charles L | Edmond, OK 73083-3610 | Oil Operator | Jul 1996 |
| 588 | Jenkins Charley W Dba Jenkins Oil Company | Duncan, OK 73533-3204 | Oil Operator | Mar 2015 |
| 589 | Jenkins Energy Company | Comanche, OK 73529 | Oil Operator | Sep 2025 |
| 590 | Jenkins Energy Corp & H Davis Jenkins | | Gas Operator | Dec 2011 |
| 591 | Jenkins Oil & Gas, Inc. | | Oil & Gas Operator | Aug 1992 |
| 592 | Jenkins Oil Corporation | Hankamer, TX 77560 | Oil & Gas Operator | Mar 2008 |
| 593 | Jenkins Petroleum Inc | Stillwater, OK 74076 | Oil & Gas Operator | Mar 1994 |
| 594 | Jenkins Walter D | Oklahoma City, OK 73156-1022 | Oil & Gas Operator | Mar 2011 |
| 595 | Jenkins, Don(Deceased)Estate | Arkansas City, KS 67005 | Oil & Gas Operator | Dec 2009 |
| 596 | Jenkins, Donnie G. Jr. | Arkansas City, KS 67005 | Oil Operator | Dec 2019 |
| 597 | Jenkins, Oliver | Paintsville, KY 41240 | Gas Operator | Dec 2014 |
| 598 | Jenkins, R. D. | Rockdale, TX 76567 | Oil & Gas Operator | Dec 2025 |
| 599 | Jenn Oil | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 600 | Jennings Drillin | | Oil & Gas Operator | Jul 1988 |