| 401 | Nichols Operating LLC | Fort Branch, IN 47648 | Oil & Gas Operator | Dec 2021 |
| 402 | Nolin Rural Electric Coop | Elizabethtown, KY 42701 | Gas Operator | Dec 2023 |
| 403 | Norwood Energy, Inc | | Oil Operator | Dec 2015 |
| 404 | Noxxe | Ottawa, KS 66067 | Oil & Gas Operator | Dec 2023 |
| 405 | Numatex, Inc | | Oil Operator | Dec 2013 |
| 406 | Nytis Exploration Company LLC | Lexington, KY 40509 | Oil & Gas Operator | Dec 2021 |
| 407 | Oeth DRLG Co | | Oil Operator | Dec 2018 |
| 408 | Ohio Kentucky Oil Corporation | Lexington, KY 40503 | Oil & Gas Operator | Dec 2023 |
| 409 | Ohio Valley Energy, Inc | Livermore, KY 42352 | Oil Operator | Dec 2023 |
| 410 | Oilcat Production Co Inc | McLeansboro, IL 62859 | Oil Operator | Dec 2023 |
| 411 | Oilfield Research, Inc | | Oil Operator | Dec 2021 |
| 412 | Omr Drilling & Acquisition LLC | Albany, KY 42602 | Oil Operator | Dec 2015 |
| 413 | Onyx Int'L Exploration LLC | | Oil & Gas Operator | Dec 2015 |
| 414 | Orbit Gas Transmission, Inc | Owensboro, KY 42303 | Oil & Gas Operator | Dec 2023 |
| 415 | Overfield, Lee R | Waverly, KY 42462 | Oil Operator | Dec 2016 |
| 416 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 417 | P & J Resources, Inc | | Oil & Gas Operator | Dec 2013 |
| 418 | P T C, Inc | Raccoon, KY 41557 | Gas Operator | Dec 2023 |
| 419 | Page, Allen | | Oil & Gas Operator | Dec 2014 |
| 420 | Papineau Drilling, Inc | Albany, KY 42602 | Oil Operator | Dec 2014 |
| 421 | Paragon Trading Co., LLC | | Oil Operator | Dec 2009 |
| 422 | Payne, George A | Newburgh, IN 47629 | Oil Operator | Dec 2023 |
| 423 | Payne, H Jennings Dba Payne Bros | Newburgh, IN 47630 | Oil Operator | Dec 2023 |
| 424 | Payne, Lawrence R Dba Payne DRLG Co | Philpot, KY 42366 | Oil Operator | Dec 2022 |
| 425 | Payne, Richard N & Lynn M | Henderson, KY 42420 | Oil Operator | Dec 2023 |
| 426 | Peach, Dennis L | Hartford, KY 42347 | Oil Operator | Dec 2023 |
| 427 | Peacock, Scott | Edmonton, KY 42129 | Oil Operator | Dec 2023 |
| 428 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 429 | Perdue-Davidson Oil Co | | Oil & Gas Operator | Dec 2021 |
| 430 | Perkins, Don & Assoc, Inc | | Oil Operator | Dec 2011 |
| 431 | Petro-Flow, Inc | | Gas Operator | Dec 2023 |
| 432 | Petrotech Resources Corp | Glasgow, KY 42141 | Oil & Gas Operator | Dec 2022 |
| 433 | Phillips Dev Co | | Oil Operator | Dec 2023 |
| 434 | Picayune Resources, Inc | Lexington, KY 40509 | Oil & Gas Operator | Dec 2023 |
| 435 | Pioneer Oil Company, Inc. | Vincennes, IN 47501 | Oil & Gas Operator | Jun 2025 |
| 436 | Pioneer Prospect LLP | Sioux Falls, SD 57108 | Gas Operator | Dec 2023 |
| 437 | Pipeline Holdings, Inc | | Gas Operator | Dec 2012 |
| 438 | Planet Energy, LLC | | Oil & Gas Operator | Dec 2015 |
| 439 | Plateau Energy, LLC | Smyer, TX 79367 | Oil & Gas Operator | Dec 2023 |
| 440 | Powell Oil And Gas, LLC | Sebree, KY 42455 | Oil Operator | Dec 2020 |
| 441 | Powell, J R Trust Uta 1-1-1983 | | Oil & Gas Operator | Dec 2013 |
| 442 | Preston Oil Co | Woodlands, TX 77380 | Oil & Gas Operator | Dec 2009 |
| 443 | Prestonsburg Citys Utilities Com | Prestonsburg, KY 41653 | Oil & Gas Operator | Dec 2023 |
| 444 | Primo Petroleum, LLC | Austin, TX 78729 | Oil Operator | Dec 2019 |
| 445 | Primrose Oil LLC | Oil Springs, KY 41238 | Oil & Gas Operator | Dec 2023 |
| 446 | Pro- Gas, Inc. | Midland, TX 79711 | Oil & Gas Operator | Dec 2025 |
| 447 | Puckett Oil, LLC | Irvine, KY 40336 | Oil Operator | Dec 2023 |
| 448 | Quality Natural Gas, LLC | Allen, KY 41601 | Oil & Gas Operator | Dec 2023 |
| 449 | Quatro Oil Ventures | | Oil Operator | Dec 2016 |
| 450 | Quisenberry, Gene | | Oil & Gas Operator | Dec 2016 |
| 451 | R & S Energy, Inc. | Snook, TX 77878 | Oil & Gas Operator | Dec 2025 |
| 452 | R B Energy Inc | Manchester, KY 40962 | Oil & Gas Operator | Jan 2015 |
| 453 | R E Riley & Company | Charleston, WV 25301 | Gas Operator | Dec 2023 |
| 454 | R H Penick Operating | Heath, OH 43056 | Gas Operator | Dec 2023 |
| 455 | R S V Co, Inc | Pikeville, KY 41501 | Gas Operator | Dec 2021 |
| 456 | Ralph, C D | Owensboro, KY 42301 | Oil Operator | Dec 2004 |
| 457 | Ralph, Terry D | Utica, KY 42376 | Oil Operator | Dec 2023 |
| 458 | Ravenna Oil Co | Beattyville, KY 41311 | Oil Operator | Dec 2023 |
| 459 | Raw Oil & Gas, Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Dec 2025 |
| 460 | Rebel Oil Company | Keaton, KY 41226 | Oil & Gas Operator | Jan 2025 |
| 461 | Reliford, Jimmy | Columbia, KY 42728 | Oil Operator | Dec 2023 |
| 462 | Reliford, Jimmy DRLG Co | Columbia, KY 42728 | Oil & Gas Operator | Dec 2019 |
| 463 | Reliford, Judy | Columbia, KY 42728 | Oil Operator | Dec 2023 |
| 464 | Renfro, William B | | Oil Operator | Dec 2013 |
| 465 | Republic Exploration, LLC | Bowling Green, KY 42104 | Oil Operator | Dec 2011 |
| 466 | Resource Energy Technologies, LLC | | Oil & Gas Operator | Dec 2017 |
| 467 | Revitalize Resources Operating, Inc | Evansville, IN 47708 | Oil Operator | Dec 2023 |
| 468 | Rey Oil & Gas, Inc | Oneida, TN 37841 | Oil Operator | Dec 2023 |
| 469 | Reynolds Res, Inc | Owensboro, KY 42303 | Oil & Gas Operator | Dec 2023 |
| 470 | Rich, Joe | | Oil Operator | Dec 2019 |
| 471 | Rick Parrish & Family Contractors Inc | Albany, KY 42602 | Oil Operator | Dec 2023 |
| 472 | Rick-Rod Oil Company, Inc | Columbia, KY 42728 | Oil Operator | Dec 2022 |
| 473 | Rick-Rod Well Services Co | | Oil Operator | Dec 2013 |
| 474 | Riddle, James O | Albany, KY 42602 | Oil Operator | Dec 2023 |
| 475 | Rife, Bud Dba B & S Gas & Oil Co | Harold, KY 41635 | Oil & Gas Operator | Dec 2023 |
| 476 | Riley & Scott Gas Co | Pikeville, KY 41502 | Gas Operator | Dec 2021 |
| 477 | Riverside Oil & Gas, Inc | Burkesville, KY 42717 | Oil & Gas Operator | Dec 2023 |
| 478 | RJW Oil And Gas, LLC | Cross Lane, WV 25313 | Oil & Gas Operator | Dec 2023 |
| 479 | Rlu Operating, LLC | Devine, TX 78016 | Oil & Gas Operator | Dec 2025 |
| 480 | Roberts, Harry S &/Or McKinley Ray | Paintsville, KY 41240 | Oil & Gas Operator | Dec 2019 |
| 481 | Roberts, Oliver M | | Oil & Gas Operator | Dec 2021 |
| 482 | Robertson Farms, LLC | Calhoun, KY 42327 | Oil Operator | Dec 2023 |
| 483 | Robertson, David | Bowling Green, KY 42103 | Oil Operator | Dec 2023 |
| 484 | Robinson Engineering & Oil Company, Inc | Evansville, IN 47716 | Oil & Gas Operator | Dec 2022 |
| 485 | Rocket Energy Corporation | Muskogee, OK 74402-1665 | Oil & Gas Operator | Dec 2003 |
| 486 | Rodline Petroleum LLC | Adolphus, KY 42120 | Oil Operator | Dec 2023 |
| 487 | Rogers, Clyde | Zellwood, FL 32798 | Oil Operator | Dec 2023 |
| 488 | Roseclare Oil Co | | Oil Operator | Dec 2016 |
| 489 | Rossi, Paul | FT Meade, FL 33841 | Oil Operator | Dec 2023 |
| 490 | Rough Creek Energy LLC | Mandeville, LA 70471 | Oil Operator | Dec 2023 |
| 491 | Rover Construction, LLC | | Oil Operator | Dec 2023 |
| 492 | Royal Carolina Producers, LLC | | Oil Operator | Dec 2015 |
| 493 | Ryholland Fielder, Inc | Delray Beach, FL 33446 | Oil & Gas Operator | Dec 2025 |
| 494 | S & C Drilling, Inc | Columbia, KY 42728 | Oil Operator | Dec 2023 |
| 495 | Saap Energy, Inc | Newburgh, NY 12550 | Oil Operator | Dec 2023 |
| 496 | Sagebrush Energy, LLC | Canton, MI 48188 | Oil Operator | Dec 2023 |
| 497 | Sand Dollar, LLC | Henderson, KY 42420 | Oil & Gas Operator | Dec 2018 |
| 498 | Sanford, Marion | Bowling Green, KY 42101 | Oil Operator | Dec 2023 |
| 499 | Sargent Oil & Gas Company | | Oil & Gas Operator | Dec 2022 |
| 500 | Sarver, Danny & Meador, Steve | Adolphus, KY 42120 | Oil Operator | Dec 2019 |