| 1 | K & E Field Services Inc | Bartlesville, OK 74005-0518 | Oil & Gas Operator | Jun 2016 |
| 2 | K & F Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Dec 2021 |
| 3 | K & H Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 1995 |
| 4 | K & K Oil | Chase, KS 67524 | Oil & Gas Operator | Oct 2019 |
| 5 | K & L Operating LLC | Cushing, OK 74023-6189 | Oil & Gas Operator | Sep 2025 |
| 6 | K & M Oil Company LLC | Hennessey, OK 73742 | Oil & Gas Operator | Aug 2025 |
| 7 | K & W Oil Company | MT Carmel, IL 62830 | Oil & Gas Operator | May 2013 |
| 8 | K C Crude Inc | Lenexa, KS 66215 | Oil & Gas Operator | Dec 2000 |
| 9 | K D S Resources Co | Thomas, OK 73669 | Oil & Gas Operator | Aug 2025 |
| 10 | K Energy Inc | Mannford, OK 74044-3023 | Oil & Gas Operator | May 2013 |
| 11 | K G Operating | Hennessey, OK 73742 | Oil & Gas Operator | May 1999 |
| 12 | K L Production Services LLC | Duncan, OK 73533-3409 | Oil & Gas Operator | Nov 2019 |
| 13 | K O G Production LLC | Freedom, OK 73842 | Oil & Gas Operator | Sep 2025 |
| 14 | K Oil Company | Houston, TX 77005 | Oil & Gas Operator | Dec 2025 |
| 15 | K Phil Fleetwood Oil Properties LLC | Marlow, OK 73055 | Oil & Gas Operator | Sep 2025 |
| 16 | K S & S Oil Company Inc | Terral, TX 73569-5056 | Oil Operator | Aug 2025 |
| 17 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Sep 2025 |
| 18 | K Spencer LLC | Drumright, OK 74030-5825 | Oil & Gas Operator | Sep 2019 |
| 19 | K-C Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Jan 2013 |
| 20 | K-Tel Petroleum | Englewood, CO 80111-4628 | Oil & Gas Operator | Sep 2007 |
| 21 | K-Von Enterprises Inc | Tecumseh, OK 74873 | Oil & Gas Operator | Jan 1994 |
| 22 | K3 Oil & Gas Operating Company | Spring, TX 77383 | Oil & Gas Operator | Aug 2025 |
| 23 | Kadane Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 1998 |
| 24 | Kahan & Associates Inc | Tulsa, OK 74170 | Oil & Gas Operator | Sep 2025 |
| 25 | Kahan Louis | Tulsa, OK 74101 | Oil & Gas Operator | May 1994 |
| 26 | Kahn George Operating Co | Seminole, OK 74818 | Oil & Gas Operator | Nov 2000 |
| 27 | Kaiser Farms | Edmond, OK 73025-9489 | Oil & Gas Operator | Aug 2025 |
| 28 | Kaiser Investments | Sand Springs, OK 74063 | Oil & Gas Operator | Sep 2003 |
| 29 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2025 |
| 30 | Kal Energy Inc | Oklahoma City, OK 73116-3606 | Oil Operator | Nov 2014 |
| 31 | Kalda Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 1994 |
| 32 | Kalkman Oil Corporation | Duncan, OK 73533 | Oil & Gas Operator | Aug 2025 |
| 33 | Kalstra Energy LTD | Denver, CO 80222-5938 | Gas Operator | Jun 2018 |
| 34 | Kamco Hot Oil Service Inc | Cement, OK 73017 | Oil & Gas Operator | Aug 2025 |
| 35 | Kana Resources, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Aug 2003 |
| 36 | Kandletop Operating, LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Aug 2025 |
| 37 | Kaneb Operating Company | Dallas, TX 75265-0283 | Oil & Gas Operator | Dec 1995 |
| 38 | Kanokla Oil & Gas Corporation | Wellington, KS 67152-0444 | Oil & Gas Operator | Aug 2025 |
| 39 | Kansas Gas Purchasing | Salina, KS 67401 | Oil & Gas Operator | May 1995 |
| 40 | Kantor Oil Company LLC | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2025 |
| 41 | Karbuhn Oil Company | Tomball, TX 77375 | Oil & Gas Operator | Dec 2025 |
| 42 | Kardaleff Steven T | Lawton, OK 73507-8471 | Oil Operator | Mar 2015 |
| 43 | Karper Oil & Gas Corporation | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 44 | Kate F H | Oklahoma City, OK 73122 | Oil & Gas Operator | Jun 2000 |
| 45 | Kato Operating Company | Bristow, OK 74010 | Oil & Gas Operator | Mar 2015 |
| 46 | Katsco Energy, Inc. | Round Rock, TX 78664 | Oil & Gas Operator | Dec 2025 |
| 47 | Katy Drilling Corporation | Tulsa, OK 74146-3717 | Oil & Gas Operator | Apr 2020 |
| 48 | Kay County Properties | Tulsa, OK 74145 | Oil & Gas Operator | May 1997 |
| 49 | Kay Production Company | Seminole, OK 74868 | Oil & Gas Operator | Aug 2025 |
| 50 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Aug 2025 |
| 51 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 52 | KCS Resources LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2017 |
| 53 | Kechi Energy LLC | Chickasha, OK 73018 | Oil & Gas Operator | Sep 2025 |
| 54 | Keck Petroleum LLC | Okmulgee, OK 74447-8516 | Oil & Gas Operator | Aug 2025 |
| 55 | Keel Dwight E | Broken Arrow, OK 74014-7569 | Oil Operator | Apr 2020 |
| 56 | Keener Oil & Gas Company | Tulsa, OK 74119-4416 | Oil & Gas Operator | Sep 2025 |
| 57 | Keener Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2018 |
| 58 | Keesee Paul Inc | Holdenville, OK 74848 | Oil & Gas Operator | Nov 1998 |
| 59 | Kehler & Kehler Oil Company | Skiatook, OK 74070-3674 | Oil & Gas Operator | Feb 2005 |
| 60 | Keith F Walker Oil & Gas Company LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2025 |
| 61 | Kelco Petroleum Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | May 2013 |
| 62 | Kelle Day Oil Producers Inc | Braman, OK 74632-9147 | Oil & Gas Operator | Dec 2023 |
| 63 | Kelle Lambing Production Co | Braman, OK 74632-0132 | Oil & Gas Operator | Nov 2014 |
| 64 | Keller Estate Leases LLC | Bartlesville, OK 74003-3608 | Oil Operator | Aug 2012 |
| 65 | Kelley James C Estate | Norman, OK 73072 | Oil & Gas Operator | Mar 2015 |
| 66 | Kelley Oil & Gas | McAlester, OK 74570 | Oil & Gas Operator | May 2013 |
| 67 | Kelley, Joseph R | | Oil & Gas Operator | Aug 2025 |
| 68 | Kellogg Oil Company | Henryetta, OK 74437 | Oil & Gas Operator | Oct 2024 |
| 69 | Kelloil Inc | Fort Worth, TX 76116-5600 | Oil & Gas Operator | Mar 2015 |
| 70 | Kelly Cook Oil LLC | Shawnee, OK 74804-3148 | Oil & Gas Operator | Aug 2025 |
| 71 | Kelly Jr Walter A Opr Co | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2014 |
| 72 | Kelly Oil | Tulsa, OK 74105 | Oil Operator | Dec 2000 |
| 73 | Kelmac Production Company | Braman, OK 74632-0132 | Oil Operator | Apr 2003 |
| 74 | Kelmar Oil Company | Chickasha, OK 73018 | Oil & Gas Operator | Jul 2025 |
| 75 | Kelt Oil & Gas | Houston, TX 77060 | Oil & Gas Operator | Dec 1998 |
| 76 | Kelton Oil & Gas Co | Wheeler, TX 79096 | Oil Operator | Jun 1991 |
| 77 | Kemmerer Company Inc | Tulsa, OK 74136-7027 | Oil & Gas Operator | Feb 2025 |
| 78 | Kemp Roy L | | Oil Operator | Jan 2011 |
| 79 | Ken Snyder Inc | Newalla, OK 74857-7107 | Oil & Gas Operator | Aug 2025 |
| 80 | Kendol Exploration Inc | Oklahoma City, OK 73105-2513 | Oil & Gas Operator | Mar 2025 |
| 81 | Kennedy & Mitchell, Inc. | Houston, TX 77084 | Oil & Gas Operator | Aug 2013 |
| 82 | Kennedy, Howard E | | Oil & Gas Operator | May 1997 |
| 83 | Kennedy, Tracy J | | Oil Operator | Aug 2025 |
| 84 | Kenneth W Cory LTD | Bellaire, TX 77401 | Oil & Gas Operator | Aug 2025 |
| 85 | Keno Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Jan 1995 |
| 86 | Kent Oil Corporation | Blanchard, OK 73010-3619 | Oil & Gas Operator | Feb 2012 |
| 87 | Kentry Oil Company | Kingston, OK 73439 | Oil Operator | Aug 2002 |
| 88 | Kenworthy Operating Company | Tulsa, OK 74132 | Oil & Gas Operator | May 2009 |
| 89 | Kepasa Corp | Oklahoma City, OK 73106 | Oil & Gas Operator | Sep 2025 |
| 90 | Kepco Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 91 | Kepco. Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 92 | Kerns Larry Dba Kerns Oil | Dewey, OK 74029-2457 | Oil Operator | Nov 2017 |
| 93 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 94 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Aug 2025 |
| 95 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 96 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 97 | Kerr-McGee Refining Corp | Oklahoma City, OK 73125 | Oil & Gas Operator | Jun 2007 |
| 98 | Ketal Oil Producing Company | Fort Worth, TX 76102 | Gas Operator | Sep 1995 |
| 99 | Key Energy Corporation | Enid, OK 73702-5349 | Oil & Gas Operator | Oct 2017 |
| 100 | Key Energy Services Inc | Midland, TX 79705-5540 | Oil Operator | Jan 2008 |