| 1 | K & A Development LLC | Wellsville, KS 66092 | Oil Operator | Dec 2025 |
| 2 | K & A Oil, A General Partnership | Longton, KS 67352 | Oil Operator | Dec 2025 |
| 3 | K & D Oil Compan | | Oil Operator | Apr 1994 |
| 4 | K & E Drilling I | | Oil & Gas Operator | Sep 1995 |
| 5 | K & E Drilling, Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2025 |
| 6 | K & E Petroleum | | Oil & Gas Operator | Jan 1995 |
| 7 | K & E Petroleum, Inc. | San Antonio, TX 78230 | Oil & Gas Operator | Apr 2012 |
| 8 | K & G Oil Incorp | | Oil Operator | Mar 1988 |
| 9 | K & K Oil | Chase, KS 67524 | Oil & Gas Operator | Oct 2019 |
| 10 | K & L Oil Compan | | Oil Operator | Dec 1993 |
| 11 | K & L Tank Truck | | Oil Operator | Aug 1987 |
| 12 | K & L Tank Truck Service, Inc. | Garden City, KS 67846 | Oil Operator | Apr 2023 |
| 13 | K & N Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Dec 2025 |
| 14 | K C Crude Inc | Lenexa, KS 66215 | Oil & Gas Operator | Dec 2000 |
| 15 | K C Crude Incorp | | Oil & Gas Operator | Mar 1994 |
| 16 | K C Development | | Oil & Gas Operator | Dec 1996 |
| 17 | K C Resources In | | Oil & Gas Operator | Oct 1993 |
| 18 | K N Energy Inc | Lakewood, CO 80228 | Oil & Gas Operator | Nov 2000 |
| 19 | K N Processing | | Gas Operator | Mar 1999 |
| 20 | K R M Petroleum | | Oil & Gas Operator | Jan 1990 |
| 21 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Jan 2026 |
| 22 | K W Oil Well Service. Inc. | Chanute, KS 66720 | Oil Operator | Apr 2017 |
| 23 | K&M LLC | | Oil Operator | Nov 2025 |
| 24 | K-3 Energy Corpo | | Oil Operator | May 1988 |
| 25 | K-Bar Oil LLC | McPherson, KS 67460 | Oil Operator | Dec 2025 |
| 26 | K-W Oil - Evans | | Oil Operator | Jan 1994 |
| 27 | K.B. Oil & Gas | | Oil & Gas Operator | Dec 2025 |
| 28 | K.C. Development, Inc. | Marion, KS 66861 | Oil Operator | Mar 2009 |
| 29 | K.C. Energy | Kansas City, MO 64111 | Oil Operator | Apr 1986 |
| 30 | K.C. Operations | | Oil Operator | Nov 2025 |
| 31 | K.E. Snyder Co., LLC | Hamilton, KS 66853 | Oil Operator | Dec 2025 |
| 32 | K.J.S. Oil | | Oil & Gas Operator | Dec 2025 |
| 33 | K.W.S. Oil Development | Chanute, KS 66720 | Oil Operator | May 2004 |
| 34 | K3 Oil & Gas Operating Company | Spring, TX 77383 | Oil & Gas Operator | Feb 2026 |
| 35 | Ka Tex Energies, Inc. | Iola, TX 77861 | Oil & Gas Operator | May 1999 |
| 36 | Kachina Oil Comp | | Oil & Gas Operator | Jan 1988 |
| 37 | Kahan & Assoc In | | Oil Operator | Dec 1996 |
| 38 | Kahan & Associates Inc | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2026 |
| 39 | Kainz, David R. | Ottawa, KS 66067 | Oil Operator | Aug 2009 |
| 40 | Kaiser-Francis O | | Oil & Gas Operator | Oct 1995 |
| 41 | Kaiser-Francis Oil | | Oil Operator | Nov 1995 |
| 42 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Apr 2026 |
| 43 | Kal Oil Operations | | Oil Operator | Oct 2025 |
| 44 | Kamc Oil & Gas LLC | Queen Creek, AZ 85142 | Oil Operator | Jan 2011 |
| 45 | Kan-Cal Enterpri | | Oil Operator | Dec 1988 |
| 46 | Kan-Texco Incorp | | Oil & Gas Operator | Dec 1994 |
| 47 | Kanaco Oil Company | | Oil Operator | Apr 2025 |
| 48 | Kanalta Resources, LTD. | Yates Center, KS 66783 | Oil Operator | Jan 1998 |
| 49 | Kandletop Operating, LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Feb 2026 |
| 50 | Kanmap Incorpora | | Oil & Gas Operator | Dec 1995 |
| 51 | Kano Partners | | Oil Operator | Sep 1989 |
| 52 | Kansas Bourse In | | Oil & Gas Operator | Apr 1985 |
| 53 | Kansas City Oil, LLC | Parkville, MO 64152 | Oil Operator | Nov 2025 |
| 54 | Kansas Crude Investments LLC | Hays, KS 67601 | Oil Operator | Dec 2025 |
| 55 | Kansas Crude Oil | | Oil Operator | Dec 1987 |
| 56 | Kansas Crude Resources, LLC | | Oil Operator | Dec 2025 |
| 57 | Kansas Crude, Inc. | Hutchinson, KS 67501 | Oil & Gas Operator | Apr 2003 |
| 58 | Kansas Energy Company, L.L.C. | Sedan, KS 67361 | Oil & Gas Operator | Dec 2025 |
| 59 | Kansas Gas Co., Inc. | Wichita Falls, TX 76310 | Gas Operator | Dec 2025 |
| 60 | Kansas Gas Service | | Oil Operator | Nov 1996 |
| 61 | Kansas Gas Suppl | | Gas Operator | Sep 1984 |
| 62 | Kansas Horizon O | | Oil & Gas Operator | Jun 1994 |
| 63 | Kansas Horizon Oil, Inc. | Windom, KS 67491 | Oil Operator | May 2017 |
| 64 | Kansas Ka-Tex Joint Venture, A General Partnership | San Antonio, TX 78216 | Gas Operator | Aug 2011 |
| 65 | Kansas MB Project, LLC | Skiatook, OK 74070 | Oil & Gas Operator | Sep 2024 |
| 66 | Kansas Natural G | | Oil & Gas Operator | Dec 1996 |
| 67 | Kansas Natural Gas Operating, LC | Hays, KS 67601 | Gas Operator | Dec 2025 |
| 68 | Kansas Natural Gas, Inc. | Hays, KS 67601 | Gas Operator | Dec 2025 |
| 69 | Kansas Oil Company | Kansas City, KS 66117 | Oil Operator | May 1997 |
| 70 | Kansas Oil Prope | | Oil & Gas Operator | Sep 1991 |
| 71 | Kansas Oil, Inc. | Chanute, KS 66720 | Oil Operator | Dec 2009 |
| 72 | Kansas Oil, LLC | | Oil Operator | Dec 2025 |
| 73 | Kansas Petroleum | | Oil & Gas Operator | Dec 1993 |
| 74 | Kansas Petroleum, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jul 2007 |
| 75 | Kansas Power & L | | Oil Operator | Mar 1982 |
| 76 | Kansas Renewable Resources, LLC | Great Bend, KS 67530 | Oil Operator | Nov 2025 |
| 77 | Kansas Resource Exploration & Development, LLC | Overland Park, KS 66202 | Oil Operator | Dec 2025 |
| 78 | Kansons Oil Co. | | Oil Operator | Jan 2014 |
| 79 | Kantor Oil Compa | | Oil Operator | Aug 1994 |
| 80 | Kantor Oil Company LLC | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2026 |
| 81 | Karbank, Barney | Kansas City, MO 64199 | Oil Operator | Sep 2001 |
| 82 | Karper Oil & Gas Corporation | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 83 | Karst Brothers Oil Co, A General Partnership | Russell, KS 67665 | Oil Operator | Dec 2025 |
| 84 | Karst Don Well S | | Oil Operator | Oct 1990 |
| 85 | Karst, Elmer L | Russell, KS 67665 | Oil Operator | Feb 1990 |
| 86 | Katana Resources | | Oil & Gas Operator | Aug 1984 |
| 87 | Kato Operating C | | Oil Operator | Aug 1988 |
| 88 | Katz Joe Oil Acc | | Oil Operator | Oct 1995 |
| 89 | Kay Dee Oil | | Oil Operator | Dec 2025 |
| 90 | KB Oil | | Oil Operator | Dec 2025 |
| 91 | KBW Oil & Gas Co | Kiowa, KS 67070 | Oil & Gas Operator | Jul 2024 |
| 92 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Jan 2026 |
| 93 | Keen Oil Co | | Oil & Gas Operator | Dec 2025 |
| 94 | Keener Oil Compa | | Oil & Gas Operator | Jul 1988 |
| 95 | Keener Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2018 |
| 96 | Keith F Walker Oil & Gas Company LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2026 |
| 97 | Keller Heirs Oil | | Oil Operator | Nov 2025 |
| 98 | Kelly Company LC | Lenexa, KS 67215 | Oil & Gas Operator | Dec 2025 |
| 99 | Kelso Casing Pul | | Oil Operator | Mar 1995 |
| 100 | Kelso, Mike Oil | Chase, KS 67524 | Oil Operator | Oct 2013 |