| 501 | Supernova Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 502 | T & C MFG. & Operating, Inc. | Great Bend, KS 67530 | Oil Operator | May 2022 |
| 503 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2024 |
| 504 | Talon Group LLC | Hays, KS 67601 | Oil Operator | Jul 2024 |
| 505 | Taos Resources Operating Co LLC | Houston, TX 77037 | Oil & Gas Operator | Dec 2019 |
| 506 | Te-Pe Oil & Gas | | Oil & Gas Operator | Jul 2024 |
| 507 | Tengasco, Inc. | Houston, TX 77063 | Oil & Gas Operator | Apr 2024 |
| 508 | Tenison Oil Comp | | Oil Operator | Jan 1993 |
| 509 | Tenneco Oil Comp | | Oil & Gas Operator | Aug 1995 |
| 510 | Texaco Explorati | | Oil & Gas Operator | Dec 1996 |
| 511 | Texaco USA - Mor | | Oil Operator | Aug 1988 |
| 512 | Texas Energies I | | Oil & Gas Operator | Aug 1994 |
| 513 | Texas Energies, Inc. | Pratt, KS 67124 | Oil & Gas Operator | Aug 1998 |
| 514 | TGT Petroleum Co | | Oil & Gas Operator | Apr 1995 |
| 515 | The Pyramid Corporation, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2009 |
| 516 | Thomas Garner, Inc. | St John, KS 67576 | Oil & Gas Operator | Jul 2024 |
| 517 | Thresher Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Dec 2024 |
| 518 | Thunderbird Dril | | Oil & Gas Operator | Nov 1995 |
| 519 | TNT Well Servicing, Inc. | Pratt, KS 67124 | Oil Operator | Jun 2006 |
| 520 | Tomkat Limited | | Oil & Gas Operator | Jul 1995 |
| 521 | Tomkat, LTD. | Wichita, KS 67278 | Oil & Gas Operator | Oct 2009 |
| 522 | Tomlinson Operating, LLC | Ketchum, ID 83340 | Oil & Gas Operator | Oct 2014 |
| 523 | Tomlinson, Sid | Hays, KS 67601 | Oil & Gas Operator | Sep 2002 |
| 524 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | Sep 2024 |
| 525 | Trek Aec, LLC | Wichita, KS 67202 | Oil & Gas Operator | Jul 2024 |
| 526 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 527 | Turnco Drilling, Inc. | Portland, OR 97208 | Oil & Gas Operator | Dec 2009 |
| 528 | Tyluka Operations, LLC | Hays, KS 67601 | Oil Operator | Jun 2024 |
| 529 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2022 |
| 530 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Dec 2024 |
| 531 | Val Energy, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jul 2024 |
| 532 | Vamco Operations | | Oil & Gas Operator | Jul 2024 |
| 533 | Vess Oil Corporation | Dallas, TX 75201 | Oil & Gas Operator | Dec 2024 |
| 534 | Vicorp Energy In | | Oil Operator | Apr 1988 |
| 535 | Viking Resources | | Oil & Gas Operator | Sep 1995 |
| 536 | Viking Resources, Inc. | Stafford, TX 77477 | Oil & Gas Operator | Dec 2024 |
| 537 | Vincent Oil Corp | Wichita, KS 67202 | Oil & Gas Operator | Jul 2024 |
| 538 | Voigt O & G Comp | | Oil & Gas Operator | Nov 1993 |
| 539 | Vonfeldt Oil Ope | | Oil Operator | Oct 1994 |
| 540 | Vonfeldt, Steven R | Russell, KS 67665 | Oil Operator | Jul 2024 |
| 541 | War Cry, LLC | Russell, KS 67665 | Oil Operator | Jul 2024 |
| 542 | Ward Feed Yard, Inc. | Larned, KS 67550 | Oil & Gas Operator | Mar 2016 |
| 543 | Webco Oil Compan | | Oil Operator | Sep 1989 |
| 544 | Webco Oil Company, Inc. | Hoisington, KS 67544 | Oil Operator | Jul 2024 |
| 545 | Weber Four Oil Co., Inc. | Hoisington, KS 67544 | Oil Operator | Jul 2024 |
| 546 | Weigel, V. Francis - Family Partnership | Gorham, KS 67640 | Oil Operator | Jul 2004 |
| 547 | Well Tech Oil And Gas, Inc. | Wichita, KS 67206 | Oil Operator | Sep 2020 |
| 548 | Westech Energy C | | Oil & Gas Operator | Dec 1996 |
| 549 | Western Oil Comp | | Oil Operator | Aug 1989 |
| 550 | White & Ellis DR | | Oil & Gas Operator | Aug 1995 |
| 551 | White & Ellis Drilling, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jul 2024 |
| 552 | White Eagle Reso | | Oil Operator | Dec 1996 |
| 553 | White Eagle Resources Corp. | Taos, NM 87571 | Oil & Gas Operator | Jun 2016 |
| 554 | Wilton Petroleum, Inc. | Canton, KS 67428 | Oil & Gas Operator | Jul 2024 |
| 555 | Winona Oil & Gas | | Oil & Gas Operator | Sep 1996 |
| 556 | Wirtz Oil, LLC | Ellinwood, KS 67526 | Oil & Gas Operator | Jul 2024 |
| 557 | Woodman & Iannit | | Oil & Gas Operator | Sep 1996 |
| 558 | Woodman & Iannitti Oil Company | Great Bend, KS 67530 | Oil & Gas Operator | Jan 2003 |
| 559 | Worldwide Energy | | Oil & Gas Operator | May 1989 |
| 560 | Wren Investments | | Oil Operator | Feb 1991 |
| 561 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Sep 2024 |
| 562 | Yost Oil Operations, Inc. | Russell, KS 67665 | Oil Operator | May 1999 |
| 563 | Yost, M. A. | Russell, KS 67665 | Oil Operator | Aug 1990 |
| 564 | Younger Bernard | | Oil Operator | Nov 1992 |
| 565 | Younger Energy C | | Oil & Gas Operator | Dec 1996 |
| 566 | Younger Energy Company | Wichita, KS 67206 | Oil & Gas Operator | Dec 2024 |
| 567 | Zenith Drilling Corporation | Wichita, KS 67206 | Oil & Gas Operator | Jul 2024 |
| 568 | Zinszer Oil Co., Inc. | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 569 | Zu, LLC | Hays, KS 67601 | Oil Operator | Jul 2024 |