| 1 | Barfield Oil Cor | | Oil Operator | Oct 1995 |
| 2 | Benson Mineral G | | Oil & Gas Operator | Dec 1995 |
| 3 | Benson Mineral Group Inc | Denver, CO 80202 | Oil & Gas Operator | Apr 2022 |
| 4 | Blake Production Company, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Oct 2025 |
| 5 | CK Oil & Gas LLC | Herington, KS 67449 | Oil & Gas Operator | Mar 2025 |
| 6 | Continental Ener | | Oil & Gas Operator | Dec 1996 |
| 7 | Dunne Equities Operating, Inc. | Houston, TX 77057 | Oil & Gas Operator | Aug 2022 |
| 8 | Eagle Energy Resources, LLC | La Porte, TX 77571 | Oil & Gas Operator | Oct 2025 |
| 9 | Everglow Energy, LLC | Oklahoma City, OK 73162 | Oil & Gas Operator | Jun 2025 |
| 10 | Exxon Corporatio | | Oil & Gas Operator | Dec 1995 |
| 11 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |
| 12 | Glacier Petroleu | | Oil & Gas Operator | Nov 1995 |
| 13 | Glacier Petroleum Co., Inc. | Emporia, KS 66801 | Oil & Gas Operator | Jun 2025 |
| 14 | Glenda Gas Compa | | Oil Operator | Sep 1988 |
| 15 | H & H Oil, LLC | Lincolnville, KS 66858 | Oil Operator | Jun 2025 |
| 16 | Hett Oil & Gas, LLC | Lincolnville, KS 66858 | Oil & Gas Operator | Jun 2025 |
| 17 | Knighton Oil Com | | Oil & Gas Operator | Nov 1996 |
| 18 | Knighton Oil Company, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 19 | Kremeier Prod & Operating | | Oil & Gas Operator | Jan 2010 |
| 20 | Miller, James R. | Herrington, KS 67449 | Oil Operator | May 2025 |
| 21 | Montgomery Production & Operating LLC | Herington, KS 67449 | Oil & Gas Operator | Jun 2025 |
| 22 | Oil & Gas Producers, Inc. | Topeka, KS 66604 | Oil Operator | Jun 2004 |
| 23 | Petroleum Produc | | Oil & Gas Operator | Dec 1996 |
| 24 | Petroleum Property Services, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 25 | Phillips Oil Company, LLC | Wichita, KS 67211 | Oil Operator | Jun 2025 |
| 26 | Randon Production Co. | Marion, KS 66861 | Oil & Gas Operator | Jun 2025 |
| 27 | Rockin K Enterprises LLC | Riverside, MO 64168 | Oil Operator | May 2025 |
| 28 | Shawmar Oil & Gas Co., Inc. | Sunnyvale, TX 75182 | Oil & Gas Operator | Dec 2023 |
| 29 | Steiner Oil And Gas | Lincolnville, KS 66858 | Oil Operator | Jan 1999 |
| 30 | Te-Pe Oil & Gas | | Oil & Gas Operator | Jun 2025 |
| 31 | Thompson, Don W | Herington, KS 67449 | Oil Operator | Jul 2003 |