| 1 | A & A Discovery, LLC | Hill City, KS 67642 | Oil Operator | May 2018 |
| 2 | A. Scott Ritchie | | Oil Operator | Mar 1985 |
| 3 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Jun 2025 |
| 4 | Arcadian Resources LLC | Glen Elder, KS 67446 | Oil & Gas Operator | Oct 2025 |
| 5 | Bach Oil Production | | Oil Operator | Jun 2025 |
| 6 | Baird Oil Company Inc | Lewisville, TX 75067 | Oil & Gas Operator | Oct 2025 |
| 7 | Baird Oil Company LLC | Logan, KS 67646 | Oil Operator | Jun 2025 |
| 8 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Oct 2025 |
| 9 | Black Diamond Oil, Inc. | Hays, KS 67601 | Oil Operator | Apr 2019 |
| 10 | Blueridge Petroleum Corporation | Edmond, OK 73003 | Oil & Gas Operator | Jun 2025 |
| 11 | Buck, Paul Jordan | Sedan, KS 67361 | Oil & Gas Operator | Jun 2025 |
| 12 | C5 Energy LLC | Collinsville, OK 74021 | Oil & Gas Operator | Dec 2019 |
| 13 | Carl, William E. | Corpus Christi, TX 78471 | Oil Operator | Jul 1986 |
| 14 | Castle Resources, Inc. | Russell, KS 67665 | Oil & Gas Operator | Jun 2025 |
| 15 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Aug 2025 |
| 16 | Crawford Production Company Inc | Junction City, AR 71749 | Oil & Gas Operator | Jun 2025 |
| 17 | Darrah Oil Company LLC | Wichita, KS 67201 | Oil & Gas Operator | Oct 2025 |
| 18 | DGH Oil, LLC | Logan, KS 67646 | Oil Operator | Jun 2025 |
| 19 | Diamond Chemical | | Oil & Gas Operator | Jan 1995 |
| 20 | Double Eagle Exploration Inc | Windthorst, TX 76389 | Oil Operator | Jun 2025 |
| 21 | Farmer, John O., Inc. | Russell, KS 67665 | Oil & Gas Operator | Jun 2025 |
| 22 | Fossil Energy, LLC | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 23 | Fourwinds Oil Corporation | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 24 | Gore Oil Company | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 25 | Great Plains Energy, Inc. | Lincoln, NE 68516 | Oil & Gas Operator | Jun 2025 |
| 26 | H & C Oil Operat | | Oil & Gas Operator | Dec 1996 |
| 27 | H & C Oil Operating Inc. | Plainville, KS 67663 | Oil & Gas Operator | Jun 2025 |
| 28 | Hansen Dane G TR | | Oil Operator | Feb 1995 |
| 29 | Hartman Oil Co., Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 30 | Hrbek, R.L. | Merino, CO 80741 | Oil & Gas Operator | Jan 2024 |
| 31 | Hummon Corp. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2023 |
| 32 | Ia Operating, Inc. | Edmond, OK 73003 | Oil Operator | Jun 2025 |
| 33 | Jaspar Co. | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 34 | Jerry Patterson Oil | | Oil Operator | May 2004 |
| 35 | John O. Farmer, Inc. | | Oil & Gas Operator | Dec 1996 |
| 36 | L. D. Drilling, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jun 2025 |
| 37 | Leben Oil Corpor | | Oil & Gas Operator | Apr 1991 |
| 38 | Maxus Exploratio | | Oil Operator | Jun 1991 |
| 39 | Murfin Drilling | | Oil & Gas Operator | Jul 1997 |
| 40 | Murfin Drilling Company Inc | Wichita, KS 67202 | Oil & Gas Operator | Aug 2025 |
| 41 | Nixon R P Operat | | Oil Operator | Aug 1995 |
| 42 | Northern Lights Oil Company, LLC | Andover, KS 67002 | Oil & Gas Operator | Jun 2025 |
| 43 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 44 | Ozark Enterprise | | Oil Operator | Nov 1990 |
| 45 | Patterson Jerry | | Oil Operator | Jan 1995 |
| 46 | Patterson Production Co. | Phillipsburg, KS 67661 | Oil Operator | Jul 1998 |
| 47 | Pioneer Resources | Jefferson, CO 80456 | Oil Operator | Dec 2009 |
| 48 | Pioneer Resources Inc. | Phillipsburg, KS 67661 | Oil & Gas Operator | Oct 2020 |
| 49 | R. P. Nixon Operations, Inc | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 50 | Red Oak Energy, Inc. | Wichita, KS 67207 | Oil & Gas Operator | Jun 2025 |
| 51 | Rice Engineering Corporation | Great Bend, KS 67530 | Oil & Gas Operator | Feb 2023 |
| 52 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |
| 53 | RL Investment, LLC | Hill City, KS 67642 | Oil Operator | Jun 2025 |
| 54 | Ryholland Fielder, Inc | Delray Beach, FL 33446 | Oil & Gas Operator | Oct 2025 |
| 55 | Samuel Gary Jr. & Associates, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 56 | T & C MFG. & Operating, Inc. | Great Bend, KS 67530 | Oil Operator | May 2022 |
| 57 | Texkan Resources, LLC | Odessa, TX 79765 | Oil & Gas Operator | Jun 2025 |
| 58 | Thunderbird Dril | | Oil & Gas Operator | Nov 1995 |
| 59 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jul 2025 |
| 60 | Trek Aec, LLC | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 61 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2023 |
| 62 | Vess Oil Corporation | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 63 | Viking Resources | | Oil & Gas Operator | Sep 1995 |
| 64 | Vincent Oil Corp | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 65 | White Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |
| 66 | WM KS Energy Resources LLC | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2019 |