| 1 | F & M Oil Compan | | Oil & Gas Operator | Feb 1993 |
| 2 | F & M Oil Company Inc | Pettus, TX 78146 | Oil & Gas Operator | Feb 2026 |
| 3 | F & S Oil | | Oil Operator | Dec 2021 |
| 4 | F E W Oil Compan | | Oil Operator | Jul 1993 |
| 5 | F.D. Looman | Sedan, KS 67361 | Oil Operator | Jun 2008 |
| 6 | F.E.W. Oil Co. | Oceanside, CA 92058 | Oil Operator | Oct 2012 |
| 7 | F.G. Holl Co., LLC | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 8 | Fadely, Dale Leon | Sedan, KS 67361 | Oil & Gas Operator | Dec 2009 |
| 9 | Fair Banks Enterprises | Chanute, KS 66720 | Oil Operator | Mar 2013 |
| 10 | Fair Oil, LTD. | Tyler, TX 75710 | Oil & Gas Operator | Feb 2026 |
| 11 | Fair Seas Enterp | | Oil & Gas Operator | Jun 1988 |
| 12 | Fairchild Explor | | Oil & Gas Operator | Apr 1995 |
| 13 | Fairchild, Bob | Kingman, KS 67068 | Oil Operator | Jan 2001 |
| 14 | Fairway Petroleu | | Oil & Gas Operator | Dec 1994 |
| 15 | Fairway Petroleum Inc | Stafford, TX 77497 | Oil & Gas Operator | Nov 2001 |
| 16 | Faith Partners I | | Oil Operator | Feb 1989 |
| 17 | Faith Petroleum, Inc. | Arkansas City, KS 67005 | Oil & Gas Operator | Sep 2025 |
| 18 | Falcon Energy Co | | Oil Operator | Apr 1992 |
| 19 | Falcon Explorati | | Oil & Gas Operator | Apr 1995 |
| 20 | Falcon Exploration | | Oil Operator | Dec 1994 |
| 21 | Falcon Exploration, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 22 | Falkin, Richard T. | Hepler, KS 66746 | Oil Operator | Nov 2019 |
| 23 | Fancher Oil Co. | | Oil & Gas Operator | Sep 1995 |
| 24 | Fancher Oil Comp | | Oil & Gas Operator | Aug 1995 |
| 25 | Fancher, Geo. H, Jr. | Denver, CO 80202 | Gas Operator | Mar 1996 |
| 26 | Fanshier, Roger | Seward, KS 67576 | Oil Operator | Oct 2008 |
| 27 | Farmer Dog Oil Co., A General Partnership | Humboldt, KS 66748 | Oil Operator | Sep 2025 |
| 28 | Farmer John O Inc | Russell, KS 67665 | Oil & Gas Operator | Sep 2025 |
| 29 | Farrar Oilwell S | | Oil & Gas Operator | Jul 1986 |
| 30 | Farrar Pump & Su | | Oil & Gas Operator | Dec 1996 |
| 31 | Farrar Pump & Supply Co., Inc. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Jun 2009 |
| 32 | Farris Oil, Inc. | Sedan, KS 67361 | Oil Operator | Aug 2025 |
| 33 | Farris Well Service | | Oil & Gas Operator | Dec 2021 |
| 34 | Farthing Don Oil | | Oil & Gas Operator | Jun 1994 |
| 35 | Fastrak Energy, LLC | Cherryvale, KS 67335 | Oil & Gas Operator | Sep 2025 |
| 36 | Faulconer, Vernon E., Inc. | Tyler, TX 75711 | Oil & Gas Operator | Dec 2025 |
| 37 | Fe Co. | Derby, KS 67037 | Oil & Gas Operator | Dec 2009 |
| 38 | Fell Oil & Gas C | | Oil Operator | Oct 1991 |
| 39 | Fender, Mildred A. | Russell, KS 67665 | Oil & Gas Operator | Jun 2000 |
| 40 | Ferguson Orval L | | Oil & Gas Operator | Oct 1983 |
| 41 | Ferris, Wakyn W. | Denver, CO 80202 | Oil Operator | Jun 1988 |
| 42 | Fewins, Gary D. | Moran, KS 66755 | Oil Operator | Jul 2019 |
| 43 | Fidelity Energy, Inc. | Houston, TX 77055 | Oil & Gas Operator | Dec 2009 |
| 44 | Fina Oil & Chemi | | Oil & Gas Operator | Oct 1995 |
| 45 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 46 | Finley Oil Compa | | Oil Operator | Oct 1992 |
| 47 | Finney Drilling Company | Wann, OK 74083-2314 | Oil Operator | Jul 2018 |
| 48 | Finney Oil Company | | Oil & Gas Operator | Sep 2025 |
| 49 | First Energy Cor | | Oil Operator | Aug 1990 |
| 50 | First Energy Corporation | | Oil & Gas Operator | Jun 1993 |
| 51 | First National O | | Oil & Gas Operator | Aug 1990 |
| 52 | First National Oil Inc | Edmond, OK 73003 | Oil & Gas Operator | Nov 2025 |
| 53 | Five Star Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Nov 2025 |
| 54 | Flatirons Resources LLC | Westminster, CO 80021 | Oil & Gas Operator | Dec 2022 |
| 55 | Flatland Energy, LLC | Gardner, KS 66030 | Oil Operator | Sep 2025 |
| 56 | Flatland Oil Com | | Oil Operator | Sep 1985 |
| 57 | Flatlander Energy LLC | Blackwell, OK 74631 | Oil & Gas Operator | Nov 2025 |
| 58 | Flatlander Petroleum LLC | | Oil & Gas Operator | Sep 2025 |
| 59 | Flint Hills Prod | | Gas Operator | Mar 1989 |
| 60 | Flint Hills Production Co., Inc. | Gas City, KS 66742 | Oil Operator | Nov 2009 |
| 61 | Flintstone Energy, LLC | El Dorado, KS 67042 | Oil Operator | Jun 2020 |
| 62 | Florine, Inc. | Gypsum, KS 67448 | Oil Operator | Sep 2025 |
| 63 | Flowers Prod Com | | Oil Operator | Aug 1994 |
| 64 | Flowers Production Co., Inc. | El Dorado, KS 67042 | Oil Operator | Jul 2009 |
| 65 | Flowers Well Ser | | Oil Operator | Feb 1991 |
| 66 | Flynn Energy Cor | | Oil & Gas Operator | Mar 1992 |
| 67 | Fna Oil Company, LLC | Richfield, KS 67953 | Gas Operator | Sep 2025 |
| 68 | Folk Oil | | Oil Operator | Dec 2009 |
| 69 | Forbes Harold G | | Oil Operator | Dec 1984 |
| 70 | Forbes, Patrick T. | Eureka, KS 67045 | Oil Operator | Sep 2025 |
| 71 | Foreman Enterprises Inc | Edmond, OK 73003 | Oil & Gas Operator | Oct 2025 |
| 72 | Forestar Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2017 |
| 73 | Formation Mechan | | Oil Operator | Dec 1986 |
| 74 | Fort Scott Methane Partners, LCC | Denver, CO 80218 | Gas Operator | Dec 2014 |
| 75 | Fossil Creek Energy, LLC | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 76 | Fossil Energy, LLC | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 77 | Fossil Resources LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 78 | Foster Gas Corporation | Brownwood, TX 76801 | Oil & Gas Operator | Jan 2009 |
| 79 | Foster Oil & Gas | Bartlesville, OK 74005 | Oil & Gas Operator | Mar 2014 |
| 80 | Foster Oil LLC | | Oil Operator | Sep 2025 |
| 81 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Feb 2026 |
| 82 | Four Corners Oil, LLC | Cape Fair, MO 65624 | Oil Operator | Sep 2025 |
| 83 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Dec 2025 |
| 84 | Four Star Oil - | | Oil Operator | Dec 1987 |
| 85 | Four States Petr | | Oil & Gas Operator | Nov 1990 |
| 86 | Four-J Oil Ops | Osawatomie, KS 66064 | Oil Operator | Mar 1998 |
| 87 | Four-Way Oper In | | Oil Operator | Aug 1994 |
| 88 | Four-Way Operating, Inc. | Great Bend, KS 67530 | Oil Operator | Sep 2013 |
| 89 | Fourth Quarter Program | Boulder, CO 80306 | Oil Operator | Feb 2006 |
| 90 | Fourwinds Oil Corporation | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 91 | Fox, Don | Chase, KS 67524 | Oil & Gas Operator | Jul 2006 |
| 92 | Fox, Warren F. Family Trust | Plains, KS 67869 | Oil Operator | Jun 2016 |
| 93 | Foxfire Expl. | | Oil Operator | Jun 1997 |
| 94 | Foxfire Explorat | | Oil Operator | Dec 1986 |
| 95 | Fpco Oil & Gas Co. | New Orleans, LA 70160 | Oil & Gas Operator | Sep 2025 |
| 96 | Franklin Calvin | | Oil Operator | Aug 1995 |
| 97 | Free State Petroleum | Hays, KS 67601 | Oil Operator | Jul 2021 |
| 98 | Fremont Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2004 |
| 99 | Fremont Exploration, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2014 |
| 100 | French & Winters | | Oil Operator | Feb 1994 |