| 30501 | Walter Exploration Company | Dallas, TX 75206 | Oil & Gas Operator | May 2026 |
| 30502 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 30503 | Walter H. Husfeld Oil Co LLC | Bowie, TX 76230 | Oil & Gas Operator | May 2026 |
| 30504 | Walter Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | May 2026 |
| 30505 | Walter Parker Inc | Talala, OK 74080-3808 | Oil & Gas Operator | Mar 2026 |
| 30506 | Walter T. Lanaux | | Oil & Gas Operator | Nov 1990 |
| 30507 | Walter W. Heard, Jr. | | Oil & Gas Operator | Dec 1995 |
| 30508 | Walters Drilling | | Oil Operator | Mar 1988 |
| 30509 | Walters Frank | Pernell, OK 73076 | Oil & Gas Operator | Sep 2014 |
| 30510 | Walters Oil Company | Elmore City, OK 73433-9505 | Oil & Gas Operator | Mar 2026 |
| 30511 | Walters Oil LLC | Elmore City, OK 73433-8637 | Oil Operator | Apr 2020 |
| 30512 | Walters Oil Well Service Inc | Walters, OK 73572-0467 | Oil & Gas Operator | Nov 2000 |
| 30513 | Walters Production | | Oil Operator | Mar 2005 |
| 30514 | Walterscheid, A. D. | Muenster, TX 76252 | Oil & Gas Operator | Dec 2014 |
| 30515 | Walterscheid, R. F. | Muenster, TX 76252 | Oil & Gas Operator | Oct 1993 |
| 30516 | Waltman Family LP | Maud, OK 74854-2603 | Oil Operator | Mar 2026 |
| 30517 | Waltman Oil & Gas | Maud, OK 74854-9739 | Oil Operator | Sep 2001 |
| 30518 | Walton Producing Company | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2005 |
| 30519 | Walton Producing Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | May 2026 |
| 30520 | Walton Properties LTD. | Midland, TX 79702 | Oil & Gas Operator | Feb 2004 |
| 30521 | Walton, James A. | Midland, TX 79702 | Oil & Gas Operator | Oct 1994 |
| 30522 | Walton, Tara | Copan, OK 74022 | Oil Operator | Dec 2025 |
| 30523 | Walton, W. W. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 1994 |
| 30524 | Wam Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Dec 2016 |
| 30525 | Wandering Star Partners #1 LLLP | | Oil & Gas Operator | Apr 2015 |
| 30526 | Wandoo Energy, LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Dec 2025 |
| 30527 | Wandover Charles T SR | Inverness, FL 34452-7527 | Oil & Gas Operator | Dec 2025 |
| 30528 | Wapi Operating LLC | McCurtain, OK 74944 | Oil & Gas Operator | Feb 2026 |
| 30529 | Wapiti Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Jul 2006 |
| 30530 | Wapiti Oil & Gas LLC | Houston, TX 77024 | Oil Operator | Dec 2011 |
| 30531 | Wapiti Operating, LLC | Houston, TX 77043 | Oil & Gas Operator | May 2026 |
| 30532 | Wapiti Petroleum, LLC | | Oil & Gas Operator | Jan 2026 |
| 30533 | War Cry, LLC | Russell, KS 67665 | Oil Operator | Jan 2026 |
| 30534 | Warbonnet Exploration Company | Houston, TX 77056 | Oil & Gas Operator | Apr 2016 |
| 30535 | Ward & Son* Alfred | | Oil & Gas Operator | Jul 2021 |
| 30536 | Ward Feed Yard, Inc. | Larned, KS 67550 | Oil & Gas Operator | Mar 2016 |
| 30537 | Ward Kelly | Drumright, OK 74030-5661 | Oil & Gas Operator | Feb 2015 |
| 30538 | Ward M Haggard Oil And Gas Exploration Inc | | Oil Operator | Apr 2026 |
| 30539 | Ward Oil Co. | Kilgore, TX 75663 | Oil & Gas Operator | May 2026 |
| 30540 | Ward Oil Company An Okla Corp | McAlester, OK 74501 | Oil & Gas Operator | Feb 1993 |
| 30541 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Feb 2026 |
| 30542 | Ward Trust | Spring, TX 77383 | Oil & Gas Operator | May 2013 |
| 30543 | Ward Williston Drilling Co | | Oil & Gas Operator | Dec 1994 |
| 30544 | Ward, Charles Oil Company | Olney, TX 76374 | Oil Operator | May 2026 |
| 30545 | Ward, E. B. | Alice, TX 78333 | Oil & Gas Operator | Jun 2001 |
| 30546 | Ward, L. S. | Graham, TX 76450 | Oil & Gas Operator | Jun 2001 |
| 30547 | Ward-Williston Company | | Oil & Gas Operator | Apr 2014 |
| 30548 | Ware House Industries | Casper, WY 82605 | Oil & Gas Operator | Dec 2013 |
| 30549 | Ware Jimmy M | Seminole, OK 74868 | Oil & Gas Operator | Nov 1998 |
| 30550 | Ware, Lonnie | | Oil & Gas Operator | Mar 2026 |
| 30551 | Warfield John E | Cleo Springs, OK 73729-9723 | Oil & Gas Operator | Jul 2005 |
| 30552 | Warfield Management, LLC | Newman, GA 30263 | Gas Operator | Dec 2021 |
| 30553 | Warhorse Midcontinent Operating Company, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2026 |
| 30554 | Warhorse Oil & Gas, LLC | | Oil & Gas Operator | Dec 2018 |
| 30555 | Warhorse Petroleum Inc | Lafayette, CO 80026 | Oil Operator | Jan 2026 |
| 30556 | Warner Clifford E | Newark, OH 43055 | Oil Operator | Dec 2022 |
| 30557 | Warner George H | Pomeroy, OH 45769 | Oil & Gas Operator | Dec 2014 |
| 30558 | Warner Gona Revocable Trust | Sand Springs, OK 74063-5296 | Oil & Gas Operator | May 2009 |
| 30559 | Warner Oil Co., Inc. | Canyon, TX 79015 | Oil & Gas Operator | May 2013 |
| 30560 | Warner Oil Prod | | Oil Operator | Apr 1995 |
| 30561 | Warner Production LLC | Mannford, OK 74044-6182 | Oil & Gas Operator | Feb 2026 |
| 30562 | Warner Sisters, LLC | Thompsons Sta, TN 37179 | Oil Operator | May 2026 |
| 30563 | Warner Ventures Inc | | Oil Operator | Dec 2024 |
| 30564 | Warner, Mark T. Oil Co | Pampa, TX 79065 | Oil & Gas Operator | Jul 2021 |
| 30565 | Warner-Pawel | Alice, TX 78333 | Oil & Gas Operator | May 2026 |
| 30566 | Warnock Operating Company, LLC | Graham, TX 76450 | Oil & Gas Operator | Jul 2013 |
| 30567 | Warpath Energy Inc | Broken Arrow, OK 74014-1118 | Oil & Gas Operator | Apr 2018 |
| 30568 | Warrego Oil & Gas LLC | Lander, WY 82520 | Oil Operator | May 2018 |
| 30569 | Warren American Oil Co | Tulsa, OK 74147 | Oil & Gas Operator | Mar 2026 |
| 30570 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | May 2026 |
| 30571 | Warren C J Oil Co | MT Carmel, IL 62863 | Oil & Gas Operator | Dec 1984 |
| 30572 | Warren Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2016 |
| 30573 | Warren Drilling Co | Dexter City, OH 45727 | Oil & Gas Operator | Dec 2025 |
| 30574 | Warren E & P Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2026 |
| 30575 | Warren Enterprises Inc | Gillette, WY 82718 | Oil Operator | Dec 2022 |
| 30576 | Warren Producers Inc | Bowling Green, KY 42102 | Oil & Gas Operator | Dec 2017 |
| 30577 | Warren Production Services | Caldwell, TX 77836 | Oil & Gas Operator | May 2026 |
| 30578 | Warren, Earl T. | San Angelo, TX 76906 | Oil & Gas Operator | May 2026 |
| 30579 | Warren, James E. | Arkansas City, KS 67005 | Oil Operator | Nov 2009 |
| 30580 | Warren, Joe H. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2001 |
| 30581 | Warren, Malcolm | Corfu, NY 14036 | Gas Operator | Dec 2024 |
| 30582 | Warrior Exploration LLC | Sapulpa, OK 74067-1912 | Oil & Gas Operator | Mar 2026 |
| 30583 | Warrior Inc | Hobbs, NM 88241 | Oil & Gas Operator | Feb 1998 |
| 30584 | Warrior Met Coal Gas, LLC | Brookwood, AL 35444 | Gas Operator | Mar 2026 |
| 30585 | Warrior Resources Inc. | Mexia, TX 76667 | Oil & Gas Operator | May 2026 |
| 30586 | Warwick Associates LC | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2026 |
| 30587 | Warwick Oil & Gas, Inc. | Houston, TX 77098 | Oil & Gas Operator | Feb 1993 |
| 30588 | Warwick Oil Corp. | | Oil & Gas Operator | Mar 1990 |
| 30589 | Warwick-Artemis, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | May 2026 |
| 30590 | Warwick-Bacchus LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2026 |
| 30591 | Warwick-Jupiter LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Mar 2026 |
| 30592 | Warwick-Minerva LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2026 |
| 30593 | Wasatch Oil & Gas Corp | Farmington, UT 84025-0699 | Oil & Gas Operator | Mar 2002 |
| 30594 | Wash, Robert C. | Forsan, TX 79733 | Oil & Gas Operator | Nov 2000 |
| 30595 | Wash, Robert C. Inc. | Forsan, TX 79733 | Oil & Gas Operator | May 2026 |
| 30596 | Washakie Energies Company | Worland, WY 82401 | Oil & Gas Operator | Dec 2019 |
| 30597 | Washakie Oil Company | | Oil & Gas Operator | Dec 1989 |
| 30598 | Washburn Lee | Newcastle, WY 82701 | Oil Operator | Jan 2025 |
| 30599 | Washington Energy Co LLC | Canonsburg, PA 15317-0400 | Oil & Gas Operator | Dec 2024 |
| 30600 | Washington Energy Exploration | | Oil & Gas Operator | Dec 1997 |