| 15501 | Kaiser Oil (U.S.) LTD. | | Oil & Gas Operator | Apr 1983 |
| 15502 | Kaiser Operating, LLC | | Oil & Gas Operator | Oct 2025 |
| 15503 | Kaiser-Francis O | | Oil & Gas Operator | Oct 1995 |
| 15504 | Kaiser-Francis Oil | | Oil Operator | Nov 1995 |
| 15505 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2025 |
| 15506 | Kal Energy Inc | Oklahoma City, OK 73116-3606 | Oil Operator | Nov 2014 |
| 15507 | Kal Oil Operations | | Oil Operator | Jun 2025 |
| 15508 | Kala Oil Company | Sundown, TX 79372 | Oil & Gas Operator | Dec 2025 |
| 15509 | Kalco Development Corporation | | Gas Operator | Dec 1989 |
| 15510 | Kalda Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 1994 |
| 15511 | Kaler Energy Corp. | Boerne, TX 78006 | Oil & Gas Operator | Dec 2025 |
| 15512 | Kaler Oil Company | Gainesville, TX 76240 | Oil & Gas Operator | Dec 2024 |
| 15513 | Kalkaska Oilfield Services Inc | | Oil Operator | Aug 2006 |
| 15514 | Kalkman Oil Corporation | Duncan, OK 73533 | Oil & Gas Operator | Oct 2025 |
| 15515 | Kallina, Carlton J. | Houston, TX 77269 | Gas Operator | Dec 2025 |
| 15516 | Kalos Corporation | Tyler, TX 75701 | Oil & Gas Operator | Dec 2025 |
| 15517 | Kalstra Energy LTD | Denver, CO 80222-5938 | Gas Operator | Jun 2018 |
| 15518 | Kamc Oil & Gas LLC | Queen Creek, AZ 85142 | Oil Operator | Jan 2011 |
| 15519 | Kamco Hot Oil Service Inc | Cement, OK 73017 | Oil & Gas Operator | Sep 2025 |
| 15520 | Kamco Limited | Salt Lake City, UT 84105 | Oil Operator | Sep 2016 |
| 15521 | Kamlok Oil & Gas, Inc. | Houston, TX 77240 | Oil & Gas Operator | Jun 1996 |
| 15522 | Kamlok, Inc. | | Oil Operator | Nov 1991 |
| 15523 | Kammer, Walter A. | Holland, NY 14080 | Gas Operator | Dec 2024 |
| 15524 | Kampresco Energy, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 15525 | Kan-Cal Enterpri | | Oil Operator | Dec 1988 |
| 15526 | Kan-Ex Incorpora | | Oil & Gas Operator | Jan 1985 |
| 15527 | Kan-Tex Drilling Corp. | | Oil Operator | Dec 1981 |
| 15528 | Kan-Texco Incorp | | Oil & Gas Operator | Dec 1994 |
| 15529 | Kana Resources, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Aug 2003 |
| 15530 | Kanaco Oil Company | | Oil Operator | Apr 2025 |
| 15531 | Kanalta Resources, LTD. | Yates Center, KS 66783 | Oil Operator | Jan 1998 |
| 15532 | Kanan Oil & Gas, Inc. | | Oil & Gas Operator | Oct 1987 |
| 15533 | Kandletop Operating, LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Oct 2025 |
| 15534 | Kaneb Energy Company | | Oil & Gas Operator | Jan 1986 |
| 15535 | Kaneb Oil & Gas | | Oil & Gas Operator | Oct 1987 |
| 15536 | Kaneb Oil & Gas Company | | Oil & Gas Operator | Nov 1985 |
| 15537 | Kaneb Operating Company | Dallas, TX 75265-0283 | Oil & Gas Operator | Dec 1995 |
| 15538 | Kaneb Operg Co. LTD. PTN. | | Oil & Gas Operator | Aug 1988 |
| 15539 | Kanik, Anthony S Dba Kanik Oil Co | McLeansboro, IL 62859 | Oil Operator | Dec 2023 |
| 15540 | Kanmap Incorpora | | Oil & Gas Operator | Dec 1995 |
| 15541 | Kano Partners | | Oil Operator | Sep 1989 |
| 15542 | Kanokla Oil & Gas Corporation | Wellington, KS 67152-0444 | Oil & Gas Operator | Oct 2025 |
| 15543 | Kanpetro, Inc. | | Oil Operator | May 1991 |
| 15544 | Kansas Bourse In | | Oil & Gas Operator | Apr 1985 |
| 15545 | Kansas City Oil, LLC | Parkville, MO 64152 | Oil Operator | Mar 2025 |
| 15546 | Kansas Crude Investments LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 15547 | Kansas Crude Oil | | Oil Operator | Dec 1987 |
| 15548 | Kansas Crude Resources, LLC | | Oil Operator | Jun 2025 |
| 15549 | Kansas Crude, Inc. | Hutchinson, KS 67501 | Oil & Gas Operator | Apr 2003 |
| 15550 | Kansas Energy Company, L.L.C. | Sedan, KS 67361 | Oil & Gas Operator | Jun 2025 |
| 15551 | Kansas Gas Co., Inc. | Wichita Falls, TX 76310 | Gas Operator | Jun 2025 |
| 15552 | Kansas Gas Purchasing | Salina, KS 67401 | Oil & Gas Operator | May 1995 |
| 15553 | Kansas Gas Service | | Oil Operator | Nov 1996 |
| 15554 | Kansas Gas Suppl | | Gas Operator | Sep 1984 |
| 15555 | Kansas Horizon O | | Oil & Gas Operator | Jun 1994 |
| 15556 | Kansas Horizon Oil, Inc. | Windom, KS 67491 | Oil Operator | May 2017 |
| 15557 | Kansas Ka-Tex Joint Venture, A General Partnership | San Antonio, TX 78216 | Gas Operator | Aug 2011 |
| 15558 | Kansas MB Project, LLC | Skiatook, OK 74070 | Oil & Gas Operator | Sep 2024 |
| 15559 | Kansas Natural G | | Oil & Gas Operator | Dec 1996 |
| 15560 | Kansas Natural Gas Operating, LC | Hays, KS 67601 | Gas Operator | Jun 2025 |
| 15561 | Kansas Natural Gas, Inc. | Hays, KS 67601 | Gas Operator | Jun 2025 |
| 15562 | Kansas Oil & Gas Corporation | Woodland HLS, CA 91367 | Oil & Gas Operator | Feb 2001 |
| 15563 | Kansas Oil Company | Kansas City, KS 66117 | Oil Operator | May 1997 |
| 15564 | Kansas Oil Prope | | Oil & Gas Operator | Sep 1991 |
| 15565 | Kansas Oil, Inc. | Chanute, KS 66720 | Oil Operator | Dec 2009 |
| 15566 | Kansas Oil, LLC | | Oil Operator | Jun 2025 |
| 15567 | Kansas Petroleum | | Oil & Gas Operator | Dec 1993 |
| 15568 | Kansas Petroleum, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jul 2007 |
| 15569 | Kansas Power & L | | Oil Operator | Mar 1982 |
| 15570 | Kansas Renewable Resources, LLC | Great Bend, KS 67530 | Oil Operator | Jun 2025 |
| 15571 | Kansas Resource Exploration & Development, LLC | Overland Park, KS 66202 | Oil Operator | Jun 2025 |
| 15572 | Kansas Resource Exploration And Development | | Oil Operator | Apr 2022 |
| 15573 | Kansas Shallow L | | Gas Operator | Oct 1990 |
| 15574 | Kansons Oil Co. | | Oil Operator | Jan 2014 |
| 15575 | Kant Walter F | Lance Creek, WY 82222 | Oil & Gas Operator | Dec 2002 |
| 15576 | Kantor Oil Compa | | Oil Operator | Aug 1994 |
| 15577 | Kantor Oil Company LLC | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2025 |
| 15578 | Kar Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Dec 2025 |
| 15579 | Kara Enterprises Inc | Upton, WY 82730 | Oil Operator | Jul 2013 |
| 15580 | Karbank, Barney | Kansas City, MO 64199 | Oil Operator | Sep 2001 |
| 15581 | Karbuhn Oil Company | Tomball, TX 77375 | Oil & Gas Operator | Dec 2025 |
| 15582 | Kardaleff Steven T | Lawton, OK 73507-8471 | Oil Operator | Mar 2015 |
| 15583 | Karen D. Mott & Mark D. Covert | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2024 |
| 15584 | Karenco Energy, Incorporated | Seguin, TX 78155 | Oil & Gas Operator | Oct 1997 |
| 15585 | Karico GP, LLC | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 15586 | Karis Resources, LLC | Tyler, TX 75707 | Oil & Gas Operator | Feb 2019 |
| 15587 | Karlton Terry Oil Company | | Oil Operator | Jan 1991 |
| 15588 | Karper Company, The | Graham, TX 76450 | Oil & Gas Operator | Feb 2003 |
| 15589 | Karper Oil & Gas Corporation | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 15590 | Karst Brothers Oil Co, A General Partnership | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 15591 | Karst Don Well S | | Oil Operator | Oct 1990 |
| 15592 | Karst Incorporated | Fort Worth, TX 76116 | Oil Operator | Dec 2025 |
| 15593 | Karst, Elmer L | Russell, KS 67665 | Oil Operator | Feb 1990 |
| 15594 | Karsted Operating, LLC | Billings, MT 59102 | Oil Operator | Aug 2025 |
| 15595 | Kas Productions | La Veta, CO 81055 | Oil Operator | Mar 2008 |
| 15596 | Kasan Corp. | Pharr, TX 78577 | Oil & Gas Operator | Sep 1995 |
| 15597 | Kase Energy LLC | Roseville, MN 55113 | Oil Operator | Aug 2006 |
| 15598 | Kash Oil And Gas, Inc | | Oil & Gas Operator | Oct 2020 |
| 15599 | Kash Operating LLC | Maljamar, NM 88264 | Oil Operator | Oct 2024 |
| 15600 | Kasle Energy Inc. | Cross Plains, TX 76443 | Oil & Gas Operator | Mar 2017 |