| 1 | Atlas Oil Co, Inc | | Oil Operator | Dec 2023 |
| 2 | Basin Petroleum, LLC | | Oil Operator | Dec 2017 |
| 3 | Big Man Oil Co, Inc | Owensboro, KY 42302 | Oil & Gas Operator | Dec 2024 |
| 4 | Bretagne, G P | Beattyville, KY 41311 | Oil & Gas Operator | Dec 2023 |
| 5 | Bretagne, LLC | Beattyville, , K 41311 | Oil Operator | Dec 2024 |
| 6 | Buttes Gas & Oil Co | | Oil & Gas Operator | Dec 2009 |
| 7 | Cain, Nicholas A & Darry R | | Oil Operator | Dec 2003 |
| 8 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Apr 2026 |
| 9 | Core Minerals Operating Co Inc | | Oil & Gas Operator | Dec 2024 |
| 10 | Countrymark Energy Resources L L C | MT Vernon, IN 47620 | Oil & Gas Operator | Dec 2024 |
| 11 | Duncan, Gene L Dba Duncan Oil Co | Salem, IL 62881 | Oil Operator | Dec 2018 |
| 12 | Ewm Services, LLC | Morganfield, KY 42437 | Oil Operator | Dec 2024 |
| 13 | Farrar Oil Company | MT Vernon, IL 62864 | Oil & Gas Operator | Dec 2000 |
| 14 | Geigo Co, LLP | | Oil Operator | Dec 2017 |
| 15 | Geo Oil Co Inc | Bloomington, IN 47402 | Oil Operator | Dec 2023 |
| 16 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
| 17 | Gulf Refining Co | | Oil Operator | Dec 2006 |
| 18 | Har-Ken Agent Ok, LTD | Owensboro, KY 42302 | Oil & Gas Operator | Dec 2023 |
| 19 | Indiana Petroleum Cont | | Oil Operator | Dec 2024 |
| 20 | Jaguar Oil, LLC | Evansville, IN 47713 | Oil Operator | Dec 2022 |
| 21 | Kellous Oil, Inc | | Oil Operator | Dec 2013 |
| 22 | Kelly Energy Co, Inc | Henderson, KY 42420 | Oil Operator | Dec 2022 |
| 23 | KLC Petroleum Company, LLC | Henderson, KY 42420 | Oil Operator | Dec 2023 |
| 24 | L. A. W. Oil, LLC | | Oil Operator | Dec 2024 |
| 25 | Lincoln Energy Corporation | Dennis, MA 02638 | Oil & Gas Operator | Dec 2021 |
| 26 | Loeb, Herman L, LLC | Lawrenceville, IL 62439 | Oil Operator | Dec 2017 |
| 27 | Meridian Resources LLC | Evansville, IN 47715 | Oil Operator | Jul 2024 |
| 28 | Moody Oil LLC | Henderson, KY 42420 | Oil Operator | Dec 2024 |
| 29 | Nally, Joseph L | Uniontown, KY 42461 | Oil & Gas Operator | Dec 2021 |
| 30 | Ohio Kentucky Oil Corporation | Lexington, KY 40503 | Oil & Gas Operator | Dec 2024 |
| 31 | Overfield, Lee R | Waverly, KY 42462 | Oil Operator | Dec 2016 |
| 32 | Payne, George A | Newburgh, IN 47629 | Oil Operator | Dec 2023 |
| 33 | Payne, H Jennings Dba Payne Bros | Newburgh, IN 47630 | Oil Operator | Dec 2023 |
| 34 | Petroleum Exploration Co | | Oil Operator | Dec 2024 |
| 35 | Picayune Resources, Inc | Lexington, KY 40509 | Oil & Gas Operator | Dec 2023 |
| 36 | Pioneer Oil Company, Inc. | Vincennes, IN 47501 | Oil & Gas Operator | Dec 2025 |
| 37 | Revitalize Resources Operating, Inc | Evansville, IN 47708 | Oil Operator | Dec 2024 |
| 38 | Robinson Engineering & Oil Company, Inc | Evansville, IN 47716 | Oil & Gas Operator | Dec 2024 |
| 39 | Roseclare Oil Co | | Oil Operator | Dec 2016 |
| 40 | Stouder DRLG Co | | Oil & Gas Operator | Dec 2024 |
| 41 | Sun Oil Company | Dallas, TX 75373 | Oil & Gas Operator | Dec 2021 |
| 42 | Union Operating Corp | Lakewoord, CO 80215 | Oil Operator | Dec 2023 |
| 43 | Union Petro Inc | Uniontown, KY 42461 | Oil Operator | Dec 2024 |
| 44 | W W Pet Service, Inc | Dixon, KY 42409 | Oil & Gas Operator | Dec 2019 |
| 45 | WB Energy Partners, LLC | | Oil Operator | Dec 2024 |