| 1 | Alpar Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jul 2011 |
| 2 | Aztec Oil Operating LLC | El Dorado, KS 67042 | Oil & Gas Operator | Mar 2026 |
| 3 | Benson Mineral G | | Oil & Gas Operator | Dec 1995 |
| 4 | Buckeye Corporat | | Oil Operator | Dec 1996 |
| 5 | C & G Oil Compan | | Oil & Gas Operator | Dec 1989 |
| 6 | C & J Production LLC | Marion, KS 66861 | Oil & Gas Operator | Feb 2025 |
| 7 | Cascade Oil Comp | | Oil & Gas Operator | Dec 1994 |
| 8 | Chisholm Trail Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | Nov 2002 |
| 9 | CK Oil & Gas LLC | Herington, KS 67449 | Oil & Gas Operator | Dec 2023 |
| 10 | Cyclone Petroleu | | Oil & Gas Operator | Nov 1995 |
| 11 | Cyclone Petroleum, Incorporated | Jenks, OK 74037 | Oil & Gas Operator | Mar 2026 |
| 12 | D & F Petroleum | | Oil & Gas Operator | Sep 1990 |
| 13 | Darrah Oil Company, LLC | Wichita, KS 67201 | Oil & Gas Operator | Jul 2026 |
| 14 | Farthing Don Oil | | Oil & Gas Operator | Jun 1994 |
| 15 | Fe Co. | Derby, KS 67037 | Oil & Gas Operator | Dec 2009 |
| 16 | Glacier Petroleu | | Oil & Gas Operator | Nov 1995 |
| 17 | Glacier Petroleum Co Inc | Emporia, KS 66801 | Oil & Gas Operator | Mar 2026 |
| 18 | Glenda Gas Compa | | Oil Operator | Sep 1988 |
| 19 | Hett Oil & Gas, LLC | Lincolnville, KS 66858 | Oil & Gas Operator | Mar 2026 |
| 20 | Knighton Oil Company, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Mar 2026 |
| 21 | Kremeier Prod & Operating | | Oil & Gas Operator | Jan 2010 |
| 22 | Montgomery Production & Operating LLC | Herington, KS 67449 | Oil & Gas Operator | Mar 2026 |
| 23 | Pyro Energy Corp | Kingwood, TX 77339-2102 | Oil & Gas Operator | Mar 1998 |
| 24 | Range Oil Co., Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jan 2020 |
| 25 | Sauder Earl W | | Oil & Gas Operator | Jan 1992 |
| 26 | Sauder, Earl W. (Deceased) | Emporia, KS 66801 | Oil & Gas Operator | Nov 1997 |
| 27 | Schindler Oil | | Oil Operator | Dec 2009 |
| 28 | Schindler Oil, LLC | Madison, KS 66860 | Oil Operator | Mar 2026 |
| 29 | SH Oil Operations LLC | Wichita, KS 67277 | Oil & Gas Operator | Mar 2026 |
| 30 | Shawmar Oil & Gas Co., Inc. | Sunnyvale, TX 75182 | Oil & Gas Operator | Dec 2023 |
| 31 | Shawmar Oil Comp | | Oil & Gas Operator | Feb 1995 |
| 32 | Three Rivers Exploration LLC | Olpe, KS 66865 | Oil Operator | Sep 2023 |
| 33 | Trek Aec, LLC | Wichita, KS 67202 | Oil & Gas Operator | Mar 2026 |
| 34 | Trimble & Maclaskey Oil LLC | Gridley, KS 66852 | Oil Operator | Mar 2026 |
| 35 | Unc Texas Incorp | | Gas Operator | May 1987 |
| 36 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2024 |
| 37 | Warhorse Petroleum Inc | Lafayette, CO 80026 | Oil Operator | Mar 2026 |
| 38 | Williams, E. L. | Emporia, KS 66801 | Oil & Gas Operator | Nov 1988 |