| 501 | Robinson Engineering & Oil Company, Inc | Evansville, IN 47716 | Oil & Gas Operator | Dec 2022 |
| 502 | Rocket Energy Corporation | Muskogee, OK 74402-1665 | Oil & Gas Operator | Dec 2003 |
| 503 | Rodline Petroleum LLC | Adolphus, KY 42120 | Oil Operator | Dec 2023 |
| 504 | Rogers, Clyde | Zellwood, FL 32798 | Oil Operator | Dec 2023 |
| 505 | Roseclare Oil Co | | Oil Operator | Dec 2016 |
| 506 | Rossi, Paul | FT Meade, FL 33841 | Oil Operator | Dec 2023 |
| 507 | Rough Creek Energy LLC | Mandeville, LA 70471 | Oil Operator | Dec 2023 |
| 508 | Rover Construction, LLC | | Oil Operator | Dec 2023 |
| 509 | Royal Carolina Producers, LLC | | Oil Operator | Dec 2015 |
| 510 | Ryholland Fielder, Inc | Delray Beach, FL 33446 | Oil & Gas Operator | Feb 2026 |
| 511 | S & C Drilling, Inc | Columbia, KY 42728 | Oil Operator | Dec 2023 |
| 512 | Saap Energy, Inc | Newburgh, NY 12550 | Oil Operator | Dec 2023 |
| 513 | Sagebrush Energy, LLC | Canton, MI 48188 | Oil Operator | Dec 2023 |
| 514 | Sand Dollar, LLC | Henderson, KY 42420 | Oil & Gas Operator | Dec 2018 |
| 515 | Sanford, Marion | Bowling Green, KY 42101 | Oil Operator | Dec 2023 |
| 516 | Sargent Oil & Gas Company | | Oil & Gas Operator | Dec 2022 |
| 517 | Sarver, Danny & Meador, Steve | Adolphus, KY 42120 | Oil Operator | Dec 2019 |
| 518 | Savage Exploration, Inc. | San Marcos, TX 78666 | Oil & Gas Operator | Feb 2026 |
| 519 | Schuster Homes Inc | Rangely, CO 81648 | Oil & Gas Operator | Apr 2013 |
| 520 | Scott, Frank | | Gas Operator | Dec 2013 |
| 521 | Shale Energy LLC | Jeffersonville, KY 40337 | Oil Operator | Dec 2018 |
| 522 | Shenandoah Energy Inc | Denver, CO 80265-1050 | Oil & Gas Operator | Dec 2014 |
| 523 | Silvco Energy, LLC | | Oil Operator | Apr 2014 |
| 524 | Silver Square Resources LLC | Cincinnati, OH 45219 | Oil Operator | Dec 2023 |
| 525 | Sinkhole Solutions, LLC | Bowling Green, KY 42103 | Oil Operator | Dec 2021 |
| 526 | Sipple Oil Co | Beattyville, KY 41311 | Oil Operator | Dec 2012 |
| 527 | Skipworth, Joseph D | | Oil Operator | Dec 2021 |
| 528 | Slone Energy, LLC | Oil Springs, KY 41238 | Oil & Gas Operator | Dec 2023 |
| 529 | Smith, Alan S | | Gas Operator | Dec 2022 |
| 530 | Smith, Donald B | | Oil Operator | Dec 2020 |
| 531 | Smith, Donald B (Deceased) | Calhoun, KY 42327 | Oil Operator | Dec 2023 |
| 532 | Smith, James E DRLG Co | | Oil Operator | Dec 2010 |
| 533 | Smith, Loretta Sue | Park City, KY 42160 | Oil Operator | Dec 2023 |
| 534 | Smithco Oil & Gas Inc | Edmonton, KY 42129 | Oil Operator | Dec 2023 |
| 535 | Snyder, Robert R | | Oil Operator | Dec 2012 |
| 536 | South Fork Energy, LLC - (Ca) | | Oil Operator | Dec 2021 |
| 537 | Southeastern Energy, Inc | Edmonton, KY 42129 | Gas Operator | Dec 2022 |
| 538 | Southeastern Gas Company | | Oil & Gas Operator | Dec 2019 |
| 539 | Southeastern Oil & Gas Corp | | Oil Operator | Dec 2023 |
| 540 | Southern Oil & Gas LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Feb 2026 |
| 541 | Southern Triangle Oil Co | MT Carmel, IL 62863 | Oil & Gas Operator | Dec 2023 |
| 542 | Sparks, Pearlman E | Mazie, KY 41160 | Oil Operator | Dec 2015 |
| 543 | Spirit Energy L.L.C. | Caddo Mills, TX 75135 | Oil & Gas Operator | Dec 2018 |
| 544 | SPN Energy, LLC | Guston, KY 40142 | Gas Operator | Dec 2023 |
| 545 | St Joseph Min Co | | Oil Operator | Dec 2023 |
| 546 | Stafford, A C | | Oil Operator | Dec 2003 |
| 547 | Standard Oil Of Kentucky, Inc | | Oil Operator | Dec 2022 |
| 548 | Stanoco Oil Co | Central City, KY 42330 | Oil & Gas Operator | Dec 2021 |
| 549 | Status Oil Well, Inc. | Charlotte, NC 28270 | Oil & Gas Operator | Dec 2011 |
| 550 | Steelhead Exploration, LLC | London, KY 40741 | Gas Operator | Dec 2020 |
| 551 | Steffey, John E | Glasgow, KY 42141 | Oil Operator | Dec 2023 |
| 552 | Steinwachs SR, James M | Robards, KY 42452 | Oil Operator | Dec 2023 |
| 553 | Steve Burchett Oil Co | | Oil Operator | Dec 2023 |
| 554 | Stevens, Dale E | Grayson, KY 41143 | Oil Operator | Dec 2023 |
| 555 | Stewart, George W | | Oil Operator | Dec 2023 |
| 556 | Stinson, Ernest Dba Logsdon Valley Oil | Horse Cave, KY 42749 | Oil Operator | Dec 2021 |
| 557 | Stiverson, R G Co, Inc | | Oil Operator | Dec 2011 |
| 558 | Storm Burchett Dba Storm Resources, LLC | Albany, KY 42602 | Oil Operator | Dec 2022 |
| 559 | Strata Tech Services, Inc | Rowlett, TX 75088 | Oil Operator | Dec 2019 |
| 560 | Sun Exploration Co, Inc | | Oil Operator | Dec 2010 |
| 561 | Sun Oil Company | Dallas, TX 75373 | Oil & Gas Operator | Dec 2021 |
| 562 | Sunset Energy L L C | Palm Harbor, FL 34683-3044 | Oil Operator | Dec 2007 |
| 563 | Sunshine Oil & Gas, LLC | Madisonville, KY 42431 | Oil & Gas Operator | Dec 2023 |
| 564 | Sutton, Elmer H | Williamsburg, KY 40769 | Oil & Gas Operator | Dec 2013 |
| 565 | Swo & Ism, LLC | | Oil & Gas Operator | Dec 2021 |
| 566 | T & A Resources LLC | Salyersville, KY 41465 | Oil Operator | Dec 2023 |
| 567 | T & B Drilling, Inc | Columbia, KY 42728 | Oil Operator | Dec 2023 |
| 568 | T & T Contracting Dba Hulman Contracting, LLC | Rockfield, KY 42274 | Oil & Gas Operator | Dec 2023 |
| 569 | Tabor, Danny | Scottsville, KY 42164 | Oil Operator | Dec 2023 |
| 570 | Tackett & Sons DRLG Contractors, Inc | Salyersville, , K 41465 | Oil & Gas Operator | Dec 2023 |
| 571 | Talbott, WM G | Albany, KY 42602 | Oil Operator | Dec 2022 |
| 572 | Tallent, Edwin Miller | Albany, KY 42602 | Oil Operator | Dec 2023 |
| 573 | Tamarack Pet Co, Inc | | Oil Operator | Dec 2020 |
| 574 | Tapp, Deborah Trust | Madisonville, KY 42431 | Oil Operator | Dec 2023 |
| 575 | Target Oil & Gas Corp | | Oil & Gas Operator | Dec 2013 |
| 576 | Tarter Bros | Dunnville, KY 42528 | Oil Operator | Dec 2023 |
| 577 | Tarter, David | Dunnville, KY 45528 | Oil & Gas Operator | Dec 2023 |
| 578 | Tarter, Donald & David | Dunnville, KY 42528 | Oil Operator | Dec 2020 |
| 579 | Tdoc, Inc | Evansville, IN 47716 | Oil Operator | Dec 2022 |
| 580 | Tennessee Properties, Inc | | Oil Operator | Dec 2014 |
| 581 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 582 | Texas Gas Transmission, LLC | Owensboro, KY 42301 | Oil & Gas Operator | Dec 2024 |
| 583 | The Texas Company | FT Worth, TX 76101 | Oil & Gas Operator | Dec 2013 |
| 584 | Thomasson Petroleum Enterprises, Inc | Bremen, KY 42325 | Oil Operator | Dec 2018 |
| 585 | Titan Resources, Inc | Somerset, KY 42502 | Oil & Gas Operator | Dec 2023 |
| 586 | TN-K Energy Group, Inc | | Oil Operator | Dec 2023 |
| 587 | Transatlantic Expl LTD Dba Ravenna Oil | Beattyville, KY 41311 | Oil Operator | Dec 2023 |
| 588 | Travell Energy, Inc | | Oil Operator | Dec 2023 |
| 589 | Travis Coomer DRLG Co | | Oil Operator | Dec 2023 |
| 590 | Trey Exploration, Inc. | San Angelo, TX 76901 | Oil & Gas Operator | Dec 2020 |
| 591 | Triad Hunter, LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2021 |
| 592 | Triad Resources Inc | Spring, TX 77389 | Oil & Gas Operator | Dec 2020 |
| 593 | Trico Energy LLC | Hager Hill, KY 41222 | Oil Operator | Dec 2018 |
| 594 | Trico/Tiger Development LLC | | Gas Operator | Dec 2017 |
| 595 | Trinity Group LLC | | Oil Operator | Dec 1997 |
| 596 | TSW Oil LLC | Dixon, KY 42409 | Oil Operator | Dec 2023 |
| 597 | Tug Fork Development | Catlettsburg, KY 41129 | Gas Operator | Dec 2021 |
| 598 | TW Oil LLC | Fordsville, KY 42343 | Oil & Gas Operator | Dec 2024 |
| 599 | Uae Investco 1 (Estill), LLC | Ravenna, KY 40472 | Oil Operator | Dec 2022 |
| 600 | Uae Investco 2 (Lee), LLC | Ravenna, KY 40472 | Oil Operator | Dec 2021 |