| 1 | American Petrole | | Oil & Gas Operator | Dec 1996 |
| 2 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | May 2025 |
| 3 | Anderson Thornto | | Oil & Gas Operator | Mar 1995 |
| 4 | Ardc Inc. | Hays, KS 67601 | Oil Operator | Apr 2025 |
| 5 | Argonaut Energy | | Oil & Gas Operator | Aug 1991 |
| 6 | Axem Resources I | | Oil Operator | Aug 1995 |
| 7 | Bach Oil Production | | Oil Operator | Apr 2025 |
| 8 | Baird Oil Company Inc | Lewisville, TX 75067 | Oil & Gas Operator | Sep 2025 |
| 9 | Baird Oil Company LLC | Logan, KS 67646 | Oil Operator | Apr 2025 |
| 10 | Benson Mineral G | | Oil & Gas Operator | Dec 1995 |
| 11 | Berexco Incorpor | | Oil & Gas Operator | Dec 1996 |
| 12 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 13 | Blake Production Company, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Sep 2025 |
| 14 | Bowman Oil Compa | | Oil Operator | Feb 1994 |
| 15 | Bruce Oil Company, L.L.C. | McPherson, KS 67460 | Oil Operator | Apr 2025 |
| 16 | Clark, Daryl | Phillipsburg, KS 67661 | Oil Operator | Nov 2024 |
| 17 | Cougar Energies, Inc. | Oberlin, KS 67749 | Oil Operator | Jun 1996 |
| 18 | Damar Resources, Inc. | Hays, KS 67601 | Oil & Gas Operator | Apr 2025 |
| 19 | Darrah John Jay Jr | Wichita, KS 67201 | Oil & Gas Operator | Aug 2025 |
| 20 | Darrah Oil Company LLC | Wichita, KS 67201 | Oil & Gas Operator | Sep 2025 |
| 21 | E & B Natural Resources Management Corporation | Hays, KS 67601 | Oil & Gas Operator | Jul 2025 |
| 22 | Eagle River Ener | | Oil Operator | Dec 1996 |
| 23 | Eagle River Energy Corporation | Broken Arrow, OK 74011 | Oil & Gas Operator | May 2025 |
| 24 | Farmer, John O., Inc. | Russell, KS 67665 | Oil & Gas Operator | Apr 2025 |
| 25 | Fourwinds Oil Corporation | Hays, KS 67601 | Oil Operator | Apr 2025 |
| 26 | Gore Oil Company | Wichita, KS 67202 | Oil & Gas Operator | Apr 2025 |
| 27 | Graham-Michaelis | | Oil & Gas Operator | Nov 1996 |
| 28 | Halliburton Oil | | Oil & Gas Operator | Sep 2008 |
| 29 | Hansen Dane G TR | | Oil Operator | Feb 1995 |
| 30 | Hansen, Dane G. - Trust | Logan, KS 67646 | Oil Operator | Oct 2013 |
| 31 | Hawn Petroleum I | | Oil Operator | Jun 1989 |
| 32 | Heartland Enterprises, Incorporated | Phillipsburg, KS 67661 | Oil Operator | May 2005 |
| 33 | Ia Operating, Inc. | Edmond, OK 73003 | Oil Operator | Apr 2025 |
| 34 | Innes Petroleum | | Oil Operator | Nov 1994 |
| 35 | Jerry Patterson Oil | | Oil Operator | May 2004 |
| 36 | Johnson Oil, A General Partnership | Phillipsburg, KS 67661 | Oil Operator | Apr 2025 |
| 37 | Ladd Petroleum C | | Oil & Gas Operator | Sep 1989 |
| 38 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2025 |
| 39 | Marathon Oil Com | | Oil & Gas Operator | Dec 1996 |
| 40 | McGinness Oil Co | Wichita, KS 67202 | Oil & Gas Operator | Dec 2019 |
| 41 | Murfin Drilling Company Inc | Wichita, KS 67202 | Oil & Gas Operator | Aug 2025 |
| 42 | Nixon R P Operat | | Oil Operator | Aug 1995 |
| 43 | NPF Energy Corporation | Boise, ID 83708 | Oil & Gas Operator | Apr 2025 |
| 44 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Sep 2025 |
| 45 | Ozark Enterprise | | Oil Operator | Nov 1990 |
| 46 | Palomino Petrole | | Oil & Gas Operator | Dec 1995 |
| 47 | Patterson Energy LLC | Hays, KS 67601 | Oil Operator | Apr 2025 |
| 48 | Petroleum Manage | | Oil & Gas Operator | Oct 1994 |
| 49 | Petroleum Management, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Sep 2025 |
| 50 | Pioneer Resources | Jefferson, CO 80456 | Oil Operator | Dec 2009 |
| 51 | Pioneer Resources Inc. | Phillipsburg, KS 67661 | Oil & Gas Operator | Oct 2020 |
| 52 | R. P. Nixon Operations, Inc | Hays, KS 67601 | Oil Operator | Apr 2025 |
| 53 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Apr 2025 |
| 54 | Sierra Petroleum | | Oil & Gas Operator | Sep 1986 |
| 55 | Sowle Explorations | | Oil Operator | Dec 2002 |
| 56 | Texkan Exploration LLC | Plainville, KS 67663 | Oil Operator | Dec 2019 |
| 57 | Thoroughbred Associates L.L.C. | Wichita, KS 67226 | Oil & Gas Operator | Apr 2025 |
| 58 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 59 | Twin Eagle Petro | | Oil Operator | Aug 1990 |
| 60 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2023 |
| 61 | Viking Resources, Inc. | Stafford, TX 77477 | Oil & Gas Operator | Sep 2025 |
| 62 | White & Ellis Drilling, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Apr 2025 |
| 63 | White Hawk Oil Company, LLP | Tulsa, OK 74103 | Oil Operator | Apr 2025 |
| 64 | Wick'S Petroleum | | Oil Operator | Aug 1983 |
| 65 | Woodman & Iannit | | Oil & Gas Operator | Sep 1996 |