| 1 | Aladdin Petroleu | | Oil & Gas Operator | Nov 1995 |
| 2 | American Energie | | Oil & Gas Operator | May 1995 |
| 3 | Brandt Prod Comp | | Oil & Gas Operator | Sep 1994 |
| 4 | Brandt Production Company, Inc. | Wichita, KS 67230 | Oil Operator | Jan 2003 |
| 5 | CJ Oil Inc | Madison, KS 66860 | Oil Operator | Jun 2025 |
| 6 | DBD Oil, LLC | Emporia, KS 66801 | Oil Operator | Jun 2025 |
| 7 | Dreyer Oil | | Oil Operator | Dec 2019 |
| 8 | Dreyer Oil - Lel | | Oil Operator | Nov 1993 |
| 9 | Farmer, John O., Inc. | Russell, KS 67665 | Oil & Gas Operator | Jun 2025 |
| 10 | Farthing Don Oil | | Oil & Gas Operator | Jun 1994 |
| 11 | Glacier Petroleu | | Oil & Gas Operator | Nov 1995 |
| 12 | Glacier Petroleum Co., Inc. | Emporia, KS 66801 | Oil & Gas Operator | Jun 2025 |
| 13 | Greenwood Resources L.L.C. | Pratt, KS 67124 | Oil Operator | Jun 2025 |
| 14 | Haack Operating Company | Tulsa, OK 74137 | Oil Operator | Apr 2025 |
| 15 | Harrison, Mark V. | Madison, KS 66860 | Oil Operator | Jul 1995 |
| 16 | Hensley, Cloide J. & Hazel M. | Arkansas City, KS 67005 | Oil Operator | Sep 2001 |
| 17 | J & M Oil Co | Overland PK, KS 66209 | Oil & Gas Operator | Jun 2025 |
| 18 | Jackson Brothers, L.L.C. | Eureka, KS 67045 | Oil Operator | Jun 2025 |
| 19 | Mack Energy Comp | | Oil & Gas Operator | Nov 1994 |
| 20 | Martin, Dail D. | Madison, KS 66860 | Oil Operator | Dec 2019 |
| 21 | Michael D. Traylor LLC | El Dorado, KS 67042 | Oil Operator | Jun 2025 |
| 22 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Aug 2025 |
| 23 | Murphy, Earl M. | Madison, KS 66860 | Oil Operator | Jun 1999 |
| 24 | Patterson Energy LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 25 | Pattie Creek Oil Company | Madison, KS 66860 | Oil Operator | Feb 2000 |
| 26 | Perrin Oil Compa | | Oil & Gas Operator | Jun 1985 |
| 27 | Petroleum Energy | | Oil & Gas Operator | Mar 1991 |
| 28 | Phillips Oil Company, LLC | Wichita, KS 67211 | Oil Operator | Jun 2025 |
| 29 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |
| 30 | Sauder Earl W | | Oil & Gas Operator | Jan 1992 |
| 31 | Sauder, Earl W. (Deceased) | Emporia, KS 66801 | Oil & Gas Operator | Nov 1997 |
| 32 | Schankie Well Service, Inc. | Madison, KS 66860 | Oil Operator | Jun 2025 |
| 33 | Schindler, Joe | Madison, KS 66860 | Oil Operator | Jun 2025 |
| 34 | Simmons Oil Corporation | | Oil Operator | Jan 1989 |
| 35 | Smith, Gordon R. | Madison, KS 66860 | Oil Operator | Nov 1998 |
| 36 | Soule, Gilbert A. | Madison, KS 66860 | Oil Operator | Jan 2002 |
| 37 | Transamerica Oil | | Oil & Gas Operator | Sep 1992 |
| 38 | Trimble & Maclaskey Oil LLC | Gridley, KS 66852 | Oil Operator | Jun 2025 |
| 39 | Viva Oil Company, Inc. | Kermit, TX 79745 | Oil & Gas Operator | Oct 2015 |