| 16001 | Kiwanda Energy, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jan 2008 |
| 16002 | Kiwanda Resc Inc | | Oil & Gas Operator | Aug 1993 |
| 16003 | Kizzar Well Servicing, Inc. | Chase, KS 67524 | Oil Operator | Feb 2025 |
| 16004 | KJ Energy, LLC | MT Enterprise, TX 75681 | Oil & Gas Operator | Jul 2024 |
| 16005 | KJ Energy, LLC Of Delaware | | Oil & Gas Operator | Nov 2016 |
| 16006 | KJB Oil Company LLC | Dewey, OK 74029-3053 | Oil Operator | Feb 2025 |
| 16007 | Kjellin, Charles Willard (Deceased) | Marion, KS 66861 | Oil & Gas Operator | Oct 2013 |
| 16008 | KJR Services LLC | Edmond, OK 73083 | Oil & Gas Operator | Sep 2024 |
| 16009 | Klabzuba Brothers LLC | Prague, OK 74864-0567 | Oil & Gas Operator | Jul 2007 |
| 16010 | Klabzuba Oil & Gas Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2012 |
| 16011 | Klabzuba Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2013 |
| 16012 | Klabzuba Royalty Company | Prague, OK 74864-0567 | Oil & Gas Operator | Dec 2019 |
| 16013 | Klaeger Operating Company II,LLC | Marble Falls, TX 78654 | Oil Operator | Jun 2025 |
| 16014 | Klaeger Operating Company, LLC | Marble Falls, TX 78654 | Oil Operator | Jun 2025 |
| 16015 | Klaeger, J. H. | Hondo, TX 78861 | Oil & Gas Operator | Dec 2009 |
| 16016 | Klassen Energy, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Jun 2025 |
| 16017 | Klause & Klaus Oil Co. | Pampa, TX 79066 | Oil & Gas Operator | Mar 2003 |
| 16018 | KLB Operating, Inc. | Plainville, KS 67663 | Oil Operator | Aug 2001 |
| 16019 | KLBW Partners LLC | Ratliff City, OK 73481 | Oil & Gas Operator | Feb 2025 |
| 16020 | KLC Petroleum Company, LLC | Henderson, KY 42420 | Oil Operator | Dec 2021 |
| 16021 | KLD Energy | | Oil & Gas Operator | Dec 2015 |
| 16022 | Kleen Oilfield Services Co | Velma, OK 73491-0178 | Oil & Gas Operator | Mar 2025 |
| 16023 | Kleese Development Associates | Youngstown, OH 44514 | Oil & Gas Operator | Dec 2024 |
| 16024 | Klein Oil & Logging | Alma, NY 14708 | Oil & Gas Operator | Dec 2023 |
| 16025 | Klein, J. L. | Henrietta, TX 76365 | Oil & Gas Operator | Sep 2013 |
| 16026 | Klenda, John | Marion, KS 66861 | Gas Operator | Dec 2023 |
| 16027 | KLH Oil & Gas, Inc. | Cross Plains, TX 76443 | Oil & Gas Operator | Jun 2025 |
| 16028 | Klima Oil, Inc. | Great Bend, KS 67530 | Oil Operator | Dec 2009 |
| 16029 | Klima Well Servi | | Oil Operator | Dec 1996 |
| 16030 | Klima Well Service, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jan 2025 |
| 16031 | Klimko, Nathan J. | Attica, NY 14011 | Gas Operator | Dec 2023 |
| 16032 | Kling, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Dec 2000 |
| 16033 | Klingberg, Roger | Cross Plains, TX 76443 | Oil & Gas Operator | Jan 2017 |
| 16034 | Klingensmith Fred T Etal | Sapulpa, OK 74066 | Oil & Gas Operator | Nov 2007 |
| 16035 | Klinger Energy Inc | Ponca City, OK 74601-7812 | Oil & Gas Operator | Oct 2019 |
| 16036 | Klinger Shirley | Ponca City, OK 74601-7812 | Oil & Gas Operator | Jan 2025 |
| 16037 | Klingler Automatic Industries Inc | | Oil & Gas Operator | Feb 2025 |
| 16038 | Klippel, B.W., Jr. | Wichita, KS 67220 | Oil Operator | May 1999 |
| 16039 | KLJ Inc | Graysville, OH 45734 | Oil & Gas Operator | Dec 2002 |
| 16040 | KLM Exploration Company, Inc. | McLouth, KS 66054 | Oil Operator | Dec 2019 |
| 16041 | KLM Oil & Gas Company | Tonganoxie, KS 66086 | Oil & Gas Operator | Apr 2014 |
| 16042 | KLM Oil Operations, Inc. | El Dorado, KS 67042 | Oil Operator | Apr 1998 |
| 16043 | KLM Operating | | Oil & Gas Operator | Oct 2024 |
| 16044 | KLM Petroleum Corp. | Midland, TX 79705 | Oil & Gas Operator | Jun 2025 |
| 16045 | KLMKH Inc | Charlotte, NC 28270 | Oil Operator | Jan 2025 |
| 16046 | Klo LLC | Tulsa, OK 74120-2428 | Oil & Gas Operator | Mar 2025 |
| 16047 | Klo Oil & Gas, L.L.C. | Tulsa, OK 74120 | Oil & Gas Operator | Jan 2023 |
| 16048 | Kloberdanz Paul | | Gas Operator | Apr 1991 |
| 16049 | Kloberdanz, Paul E. | Oklahoma City, OK 73157 | Oil & Gas Operator | Aug 2021 |
| 16050 | Klock, Carol H. | Auburn, NY 13021 | Gas Operator | Dec 2023 |
| 16051 | Klock, Ted | Corsicana, TX 75110 | Oil Operator | Jul 2022 |
| 16052 | Klondike Investments, Inc. | Paola, KS 66071 | Oil Operator | Sep 2011 |
| 16053 | Klosinski, David | Cattaraugus, NY 14719 | Gas Operator | Dec 2023 |
| 16054 | Klotzman, M. S. Exploration Co. | Victoria, TX 77903 | Oil & Gas Operator | Jun 2025 |
| 16055 | KLT Gas Inc | Woodlands, TX 77380 | Oil & Gas Operator | Sep 2004 |
| 16056 | Klug, E A & A J (Estate) | Proctor, WV 26055-0000 | Oil & Gas Operator | Dec 2021 |
| 16057 | Klutts, Carlos J. | Austin, TX 78711 | Oil & Gas Operator | Apr 2002 |
| 16058 | KMD Operating Company LLC | | Oil & Gas Operator | Dec 2015 |
| 16059 | Kmfad Oil And Gas LLC | Coshocton, OH 43812 | Oil & Gas Operator | Dec 2023 |
| 16060 | Kmi Continental Off. Prod. Co. | | Oil & Gas Operator | Jan 1988 |
| 16061 | KMK Oil & Gas, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Jun 2025 |
| 16062 | KMP Operating Inc. | | Oil Operator | Apr 2025 |
| 16063 | KMV Consulting Inc | Winston Salem, NC 27101-2561 | Gas Operator | Dec 2012 |
| 16064 | KN Production Co. | Lakewood, CO 80228 | Oil & Gas Operator | Jun 2003 |
| 16065 | Knaup, Harry J. & Lucille | Shelby, MT 59474 | Oil Operator | Oct 2023 |
| 16066 | KND Oil & Gas, LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Nov 2023 |
| 16067 | Kneupper Oil, LLC | MC Camey, TX 79752 | Oil & Gas Operator | Jun 2025 |
| 16068 | KNG Producers | Dumas, TX 79029 | Oil & Gas Operator | Oct 2009 |
| 16069 | Knickerbocker Land Resources | Fort Worth, TX 76116 | Oil & Gas Operator | Mar 2015 |
| 16070 | Knife Oil Company Inc | Cushing, OK 74023-1347 | Oil & Gas Operator | Aug 2000 |
| 16071 | Knife River Oil, LLC | Bull Shoals, AR 72619 | Oil Operator | Feb 2017 |
| 16072 | Knight Casing Pulling Company | | Oil Operator | Jun 1989 |
| 16073 | Knight Energy Inc | Tulsa, OK 74104 | Oil Operator | Mar 2025 |
| 16074 | Knight Exploration, Inc. | | Oil & Gas Operator | Sep 1989 |
| 16075 | Knight Oil Company | Victoria, KS 67671 | Gas Operator | Feb 2025 |
| 16076 | Knight Resources LLC | | Oil & Gas Operator | Dec 2013 |
| 16077 | Knight Resources, Inc. | | Oil & Gas Operator | Dec 2011 |
| 16078 | Knight, Joeann | Kilgore, TX 75662 | Oil Operator | Sep 1989 |
| 16079 | Knight, Michael L. | Ripley, NY 14775 | Gas Operator | Dec 2023 |
| 16080 | Knight, Reuben B. | Windthorst, TX 76389 | Oil & Gas Operator | Jun 2025 |
| 16081 | Knight, Wilbur H. Et Al | | Oil & Gas Operator | Jul 1991 |
| 16082 | Knighton Oil Com | | Oil & Gas Operator | Nov 1996 |
| 16083 | Knighton Oil Company, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Feb 2025 |
| 16084 | Knightsbridge Petroleum Corp. | | Oil Operator | Jul 1991 |
| 16085 | KNK Oil & Gas | Abilene, TX 79602 | Oil & Gas Operator | Dec 1996 |
| 16086 | Knobler, Alfred E | | Oil & Gas Operator | Dec 2003 |
| 16087 | Knobloch, Albert | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 16088 | Knotts Brothers | Orma, WV 25268-0000 | Oil & Gas Operator | Dec 2021 |
| 16089 | Knox Energy Inc | New Albany, OH 43054 | Oil & Gas Operator | Dec 2024 |
| 16090 | Knox Industries, Inc. | Arlington, TX 76012 | Oil & Gas Operator | Jun 2025 |
| 16091 | Knox, D. M., Oil Co. | Weatherford, TX 76086 | Oil & Gas Operator | Mar 2000 |
| 16092 | Knox, H. A. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 16093 | Knox, Jack L. | Coleman, TX 76834 | Oil & Gas Operator | Jun 2025 |
| 16094 | Knutson Production Company | Loco, OK 73442-9706 | Oil & Gas Operator | Feb 2025 |
| 16095 | Ko Operating | Merkel, TX 79536 | Oil & Gas Operator | Jun 2025 |
| 16096 | Ko Operating LLC | Austin, TX 78746 | Oil Operator | Jun 2025 |
| 16097 | Kobar Corporation | Riverton, WY 82501 | Gas Operator | Dec 1996 |
| 16098 | Koby Oil Company LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
| 16099 | Kocana Resources | Ranchos Taos, NM 87557 | Oil & Gas Operator | Jul 1999 |
| 16100 | Koch Exploration | | Oil & Gas Operator | Oct 1988 |