| 501 | Silver Square Resources LLC | Cincinnati, OH 45219 | Oil Operator | Dec 2023 |
| 502 | Sinkhole Solutions, LLC | Bowling Green, KY 42103 | Oil Operator | Dec 2021 |
| 503 | Sipple Oil Co | Beattyville, KY 41311 | Oil Operator | Dec 2012 |
| 504 | Skipworth, Joseph D | | Oil Operator | Dec 2021 |
| 505 | Slone Energy, LLC | Oil Springs, KY 41238 | Oil & Gas Operator | Dec 2023 |
| 506 | Smith, Alan S | | Gas Operator | Dec 2022 |
| 507 | Smith, Donald B | | Oil Operator | Dec 2020 |
| 508 | Smith, Donald B (Deceased) | Calhoun, KY 42327 | Oil Operator | Dec 2023 |
| 509 | Smith, James E DRLG Co | | Oil Operator | Dec 2010 |
| 510 | Smith, Loretta Sue | Park City, KY 42160 | Oil Operator | Dec 2023 |
| 511 | Smithco Oil & Gas Inc | Edmonton, KY 42129 | Oil Operator | Dec 2023 |
| 512 | Snyder, Robert R | | Oil Operator | Dec 2012 |
| 513 | South Fork Energy, LLC - (Ca) | | Oil Operator | Dec 2021 |
| 514 | Southeastern Gas Company | | Oil & Gas Operator | Dec 2019 |
| 515 | Southeastern Oil & Gas Corp | | Oil Operator | Dec 2023 |
| 516 | Southern Oil & Gas LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Sep 2025 |
| 517 | Southern Triangle Oil Co | MT Carmel, IL 62863 | Oil & Gas Operator | Dec 2023 |
| 518 | Sparks, Pearlman E | Mazie, KY 41160 | Oil Operator | Dec 2015 |
| 519 | Spirit Energy L.L.C. | Caddo Mills, TX 75135 | Oil & Gas Operator | Dec 2018 |
| 520 | SPN Energy, LLC | Guston, KY 40142 | Gas Operator | Dec 2023 |
| 521 | St Joseph Min Co | | Oil Operator | Dec 2023 |
| 522 | Stafford, A C | | Oil Operator | Dec 2003 |
| 523 | Standard Oil Of Kentucky, Inc | | Oil Operator | Dec 2022 |
| 524 | Stanoco Oil Co | Central City, KY 42330 | Oil & Gas Operator | Dec 2021 |
| 525 | Status Oil Well, Inc. | Charlotte, NC 28270 | Oil & Gas Operator | Dec 2011 |
| 526 | Steffey, John E | Glasgow, KY 42141 | Oil Operator | Dec 2023 |
| 527 | Steinwachs SR, James M | Robards, KY 42452 | Oil Operator | Dec 2023 |
| 528 | Steve Burchett Oil Co | | Oil Operator | Dec 2023 |
| 529 | Stevens, Dale E | Grayson, KY 41143 | Oil Operator | Dec 2023 |
| 530 | Stewart, George W | | Oil Operator | Dec 2023 |
| 531 | Stinson, Ernest Dba Logsdon Valley Oil | Horse Cave, KY 42749 | Oil Operator | Dec 2021 |
| 532 | Stiverson, R G Co, Inc | | Oil Operator | Dec 2011 |
| 533 | Storm Burchett Dba Storm Resources, LLC | Albany, KY 42602 | Oil Operator | Dec 2022 |
| 534 | Strata Tech Services, Inc | Rowlett, TX 75088 | Oil Operator | Dec 2019 |
| 535 | Sun Exploration Co, Inc | | Oil Operator | Dec 2010 |
| 536 | Sun Oil Company | Dallas, TX 75373 | Oil & Gas Operator | Dec 2021 |
| 537 | Sunset Energy L L C | Palm Harbor, FL 34683-3044 | Oil Operator | Dec 2007 |
| 538 | Sunshine Oil & Gas, LLC | Madisonville, KY 42431 | Oil & Gas Operator | Dec 2023 |
| 539 | Sutton, Elmer H | Williamsburg, KY 40769 | Oil & Gas Operator | Dec 2013 |
| 540 | Swo & Ism, LLC | | Oil & Gas Operator | Dec 2021 |
| 541 | T & A Resources LLC | Salyersville, KY 41465 | Oil Operator | Dec 2023 |
| 542 | T & B Drilling, Inc | Columbia, KY 42728 | Oil Operator | Dec 2023 |
| 543 | T & T Contracting Dba Hulman Contracting, LLC | Rockfield, KY 42274 | Oil & Gas Operator | Dec 2023 |
| 544 | T.W. Oil LLC | Fordsville, KY 42343 | Oil & Gas Operator | Dec 2024 |
| 545 | Tabor, Danny | Scottsville, KY 42164 | Oil Operator | Dec 2023 |
| 546 | Tackett & Sons DRLG Contractors, Inc | Salyersville, , K 41465 | Oil & Gas Operator | Dec 2023 |
| 547 | Talbott, WM G | Albany, KY 42602 | Oil Operator | Dec 2022 |
| 548 | Tallent, Edwin Miller | Albany, KY 42602 | Oil Operator | Dec 2023 |
| 549 | Tamarack Pet Co, Inc | | Oil Operator | Dec 2020 |
| 550 | Tapp, Deborah Trust | Madisonville, KY 42431 | Oil Operator | Dec 2023 |
| 551 | Target Oil & Gas Corp | | Oil & Gas Operator | Dec 2013 |
| 552 | Tarter Bros | Dunnville, KY 42528 | Oil Operator | Dec 2023 |
| 553 | Tarter, David | Dunnville, KY 45528 | Oil & Gas Operator | Dec 2023 |
| 554 | Tarter, Donald & David | Dunnville, KY 42528 | Oil Operator | Dec 2020 |
| 555 | Tdoc, Inc | Evansville, IN 47716 | Oil Operator | Dec 2022 |
| 556 | Tennessee Properties, Inc | | Oil Operator | Dec 2014 |
| 557 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 558 | Texas Gas Transmission LLC | Owensboro, KY 42301 | Oil & Gas Operator | Dec 2024 |
| 559 | The Texas Company | FT Worth, TX 76101 | Oil & Gas Operator | Dec 2013 |
| 560 | Thomasson Petroleum Enterprises, Inc | Bremen, KY 42325 | Oil Operator | Dec 2018 |
| 561 | Titan Resources, Inc | Somerset, KY 42502 | Oil & Gas Operator | Dec 2023 |
| 562 | TN-K Energy Group, Inc | | Oil Operator | Dec 2023 |
| 563 | Transatlantic Expl LTD Dba Ravenna Oil | Beattyville, KY 41311 | Oil Operator | Dec 2023 |
| 564 | Travell Energy, Inc | | Oil Operator | Dec 2023 |
| 565 | Travis Coomer DRLG Co | | Oil Operator | Dec 2023 |
| 566 | Trey Exploration, Inc. | San Angelo, TX 76901 | Oil & Gas Operator | Dec 2020 |
| 567 | Triad Hunter, LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2021 |
| 568 | Triad Resources Inc | Spring, TX 77389 | Oil & Gas Operator | Dec 2020 |
| 569 | Trico Energy LLC | Hager Hill, KY 41222 | Oil Operator | Dec 2018 |
| 570 | Trico/Tiger Development LLC | | Gas Operator | Dec 2017 |
| 571 | Trinity Group LLC | | Oil Operator | Dec 1997 |
| 572 | TSW Oil LLC | Dixon, KY 42409 | Oil Operator | Dec 2023 |
| 573 | Tug Fork Development | Catlettsburg, KY 41129 | Gas Operator | Dec 2021 |
| 574 | Uae Investco 1 (Estill), LLC | Ravenna, KY 40472 | Oil Operator | Dec 2022 |
| 575 | Uae Investco 2 (Lee), LLC | Ravenna, KY 40472 | Oil Operator | Dec 2021 |
| 576 | Uebelhor, Theodore | | Oil Operator | Dec 2023 |
| 577 | Union Operating Corp | Lakewoord, CO 80215 | Oil Operator | Dec 2023 |
| 578 | Union Petro Inc | Uniontown, KY 42461 | Oil Operator | Dec 2023 |
| 579 | United Fuel Gas Co | | Oil & Gas Operator | Dec 2022 |
| 580 | United Well Completion, Inc | Corbin, KY 40701 | Oil & Gas Operator | Dec 2023 |
| 581 | Universal Operating, Inc | Evansville, IN 47715 | Oil & Gas Operator | Dec 2023 |
| 582 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2023 |
| 583 | Van Lingen, Peter | Nashville, TN 37215 | Oil Operator | Dec 2023 |
| 584 | Vandiver, Tony E | Island, KY 42350 | Oil Operator | Dec 2023 |
| 585 | Viking Exploration, LLC | Mousie, KY 41839 | Oil & Gas Operator | Dec 2023 |
| 586 | Viking Oil & Gas, LLC | Caneyville, KY 42721 | Oil & Gas Operator | Dec 2023 |
| 587 | Vinland Energy Operations, LLC | Lexington, KY 40509 | Oil & Gas Operator | Dec 2023 |
| 588 | Vogler, John F | Greenville, KY 42345 | Oil Operator | Dec 2023 |
| 589 | W W Pet Service, Inc | Dixon, KY 42409 | Oil & Gas Operator | Dec 2022 |
| 590 | Walker Resources Co, LLC | | Oil & Gas Operator | Dec 2013 |
| 591 | Watts, J R | | Oil Operator | Dec 2009 |
| 592 | Weal DRLG Co, Inc | Madisonville, KY 42431 | Oil & Gas Operator | Dec 2023 |
| 593 | Wema Natural Res, Inc | Sharon Grove, KY 42280 | Oil Operator | Dec 2021 |
| 594 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Jun 2025 |
| 595 | West Gas Inc | | Oil & Gas Operator | Dec 2017 |
| 596 | Wheeler Oil, LTD | Isonville, KY 41149 | Oil & Gas Operator | Dec 2023 |
| 597 | Whitney Oil & Gas Co, LLC | | Oil & Gas Operator | Dec 2017 |
| 598 | Whittington Energy Co. | Melbourne, FL 32901 | Oil & Gas Operator | Sep 2025 |
| 599 | Wigner, David H Jr | Franklin, KY 42134 | Oil Operator | Dec 2023 |
| 600 | Wildcat Exploration, LLC | Glasgow, KY 42141 | Oil Operator | Dec 2023 |