| 2001 | HJ, Inc. | Garden City, KS 67846 | Oil & Gas Operator | Sep 2025 |
| 2002 | HKW Oil Company, Inc. | Bunker Hill, KS 67626 | Oil Operator | Dec 2009 |
| 2003 | HMN Partnership | Argonia, KS 67004 | Oil Operator | Nov 1993 |
| 2004 | Hodges & Hodges Oil Venture | Gallup, NM 87301 | Oil Operator | May 1999 |
| 2005 | Hodges Oil | | Oil Operator | Sep 2025 |
| 2006 | Hodges, Dennis D. And Peggy D. | Reading, KS 66868 | Oil Operator | Sep 2025 |
| 2007 | Hoehn Oil | Wellsville, KS 66092 | Oil Operator | Oct 1998 |
| 2008 | Hoehn Oil LLC | Wellsville, KS 66092 | Oil Operator | Sep 2025 |
| 2009 | Hoener Ross Inco | | Oil Operator | Dec 1991 |
| 2010 | Hoener, Ross | Iuka, KS 67066 | Oil & Gas Operator | Jul 2025 |
| 2011 | Hoepker, Larry | Humboldt, KS 66748 | Oil Operator | Dec 2024 |
| 2012 | Hoff Oil & Gas | | Oil Operator | May 2013 |
| 2013 | Hoffman Oil, Inc. | Claflin, KS 67525 | Oil Operator | Sep 2025 |
| 2014 | Hoffman Petroleu | | Oil Operator | Sep 1989 |
| 2015 | Hoffman Petroleum, Inc. | Littleton, CO 80120 | Oil Operator | Sep 1996 |
| 2016 | Hoffman Resources LLC | Hoisington, KS 67544 | Oil & Gas Operator | Sep 2025 |
| 2017 | Hoffman, Brian | Claflin, KS 67525 | Oil Operator | Sep 2025 |
| 2018 | Hoffman, Myrle F. | Denver, CO 80202 | Oil Operator | Dec 1986 |
| 2019 | Hogoboom Al Oilf | | Oil Operator | Oct 1990 |
| 2020 | Holcomb Oil Comp | | Oil Operator | Sep 1991 |
| 2021 | Holland Assoc | | Oil Operator | Sep 1987 |
| 2022 | Holt IVan | | Oil Operator | Mar 1989 |
| 2023 | Holt IVan Leroy | | Oil & Gas Operator | Jan 1994 |
| 2024 | Holt Oil & Gas C | | Oil Operator | Sep 1984 |
| 2025 | Holt, Carol | Independence, KS 67301 | Oil Operator | Jul 2025 |
| 2026 | Holt, Roger | Cherryvale, KS 67335 | Gas Operator | Mar 2003 |
| 2027 | Holtom, Bill, A General Partnership | Saint Paul, KS 66771 | Oil Operator | Jun 2024 |
| 2028 | Holton Brothers | Canton, KS 67428 | Oil Operator | Apr 1990 |
| 2029 | Home-Stake Royalty Corp., The | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2014 |
| 2030 | Hon R J Oil & Ga | | Oil Operator | Nov 1990 |
| 2031 | Hondo Oil & Gas | Houston, TX 77042 | Oil & Gas Operator | Oct 1995 |
| 2032 | Honey Oil Co | Wichita, KS 67226 | Oil & Gas Operator | Mar 2009 |
| 2033 | Honey Well, LLC | Lenexa, KS 66219 | Oil Operator | Sep 2025 |
| 2034 | Hoover Noble C | | Oil Operator | Nov 1992 |
| 2035 | Hope Company, LLC | Longmont, CO 80502 | Gas Operator | Feb 2012 |
| 2036 | Hopewell Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Feb 2026 |
| 2037 | Hoppe Oil & Gas | | Oil Operator | Nov 1992 |
| 2038 | Hoppe Oil & Gas Co., Inc. | Wichita, KS 67202 | Oil Operator | Jul 1998 |
| 2039 | Hopper Oil Co., Inc. | Winfield, KS 67156 | Oil Operator | Jul 2025 |
| 2040 | Hopper Oil Compa | | Oil Operator | Sep 1988 |
| 2041 | Horizon Oil & Ga | | Oil & Gas Operator | Jan 1992 |
| 2042 | Horizontal Development & Production Inc | Lubbock, TX 79493 | Oil & Gas Operator | Jul 2002 |
| 2043 | Horner Richard R | | Gas Operator | May 1995 |
| 2044 | Horseshoe Operating Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 2023 |
| 2045 | Horst Oil, LLC | Pittsburg, MO 65724 | Oil Operator | Dec 2009 |
| 2046 | Horton Oil Company | Independence, KS 67301 | Oil & Gas Operator | Jul 2000 |
| 2047 | Horton, Jack | Independence, KS 67301 | Oil & Gas Operator | Aug 2015 |
| 2048 | Horton, John | Sedan, KS 67361 | Oil & Gas Operator | Sep 2025 |
| 2049 | House, Dustin | Shawnee, KS 66218 | Oil Operator | Sep 2025 |
| 2050 | Housel John R Jr | | Oil Operator | Oct 1994 |
| 2051 | Housel, Robert E. | Cherryvale, KS 67335 | Oil & Gas Operator | Dec 2003 |
| 2052 | Houston Hydrolan | | Oil Operator | Jul 1984 |
| 2053 | Houtchens, D. D. | Gainesville, TX 76240 | Oil & Gas Operator | Feb 2026 |
| 2054 | Howell Oil Compa | | Oil & Gas Operator | Aug 1995 |
| 2055 | Howell Oil Company | Hutchinson, KS 67504 | Oil & Gas Operator | Sep 2025 |
| 2056 | Hrbek, R. L. | Merino, CO 80741 | Oil & Gas Operator | Jan 2024 |
| 2057 | HRL Oilfields In | | Oil Operator | Jun 1998 |
| 2058 | HRM Resources II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 2059 | Hub Oil Company | | Oil Operator | Jan 1990 |
| 2060 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Feb 2026 |
| 2061 | Huber J M Corpor | | Oil & Gas Operator | Dec 1996 |
| 2062 | Huber Oil Company, A General Partnership | Madison, KS 66860 | Oil & Gas Operator | Feb 2025 |
| 2063 | Hudson Brothers, Inc. | Hutchinson, KS 67501 | Oil & Gas Operator | Jun 2007 |
| 2064 | Hughes Drilling Co Inc | Enid, OK 73702 | Oil & Gas Operator | Apr 1998 |
| 2065 | Hughes Drilling Co, A General Partnership | Wellsville, KS 66092 | Oil Operator | Sep 2025 |
| 2066 | Hughes Services, LLC | Wellsville, KS 66092 | Oil Operator | Sep 2025 |
| 2067 | Hugoton Energy C | | Oil & Gas Operator | Feb 2004 |
| 2068 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 2069 | Huitt Joe A | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 2070 | Humerickhouse Oil, LLC | Ottawa, KS 66067 | Oil Operator | Sep 2025 |
| 2071 | Humerickhouse, Donald L. | Ottawa, KS 66067 | Oil Operator | Dec 2009 |
| 2072 | Hummingbird Oil, LLC | Sedan, KS 67361 | Oil Operator | Sep 2025 |
| 2073 | Hummon Corp | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2023 |
| 2074 | Hunt Oil, LLC | Garnett, KS 66032 | Oil Operator | Jun 2025 |
| 2075 | Huntington Energy LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Feb 2026 |
| 2076 | Hupfer Oil & Gas | Hays, KS 67601 | Oil & Gas Operator | Dec 1993 |
| 2077 | Hupfer Operating, Inc. | Shawnee, KS 66203 | Oil & Gas Operator | Dec 2019 |
| 2078 | Husain, Mrs. Shahnaz | Tulsa, OK 74136 | Oil Operator | Nov 1996 |
| 2079 | Hutchinson Oil C | | Oil & Gas Operator | May 1995 |
| 2080 | Hutchinson Oil Co. | | Oil & Gas Operator | Sep 2025 |
| 2081 | Hutchison Jay Oi | | Oil Operator | Sep 1991 |
| 2082 | Hutton Charles N | | Oil Operator | Dec 1994 |
| 2083 | Hutton, Charles N., SR. | Iola, KS 66749 | Oil Operator | Nov 2007 |
| 2084 | Hyde-Marrs, Inc. | Wichita, KS 67202 | Oil Operator | Aug 1997 |
| 2085 | I & F Oil And Farm | | Oil & Gas Operator | Dec 2009 |
| 2086 | I & M Oil Production, LLC | Overland Park, KS 66209 | Oil & Gas Operator | Nov 2019 |
| 2087 | Ia Operating, Inc. | Edmond, OK 73003 | Oil Operator | Sep 2025 |
| 2088 | Iantha Resources LLC | Garnett, KS 66032 | Oil Operator | Dec 2019 |
| 2089 | Iconic Oil & Gas LLC | Dallas, TX 75229 | Gas Operator | Sep 2025 |
| 2090 | Iep Kansas Gas, LLC | Burlington, CO 80807 | Oil & Gas Operator | Dec 2025 |
| 2091 | Igwt, Inc. | Rose Hill, KS 67133 | Oil & Gas Operator | Sep 2025 |
| 2092 | Impact Energy Operating LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Dec 2025 |
| 2093 | Imperator Investments LLC | Shawnee, KS 66217 | Oil Operator | Aug 2024 |
| 2094 | Imperial American Oil Corporation | Wichita, KS 67205 | Oil Operator | Dec 2009 |
| 2095 | Imperial Oil & G | | Gas Operator | Jan 1990 |
| 2096 | Imperial Oil And Gas, Inc. | Wichita, KS 67202 | Gas Operator | Jun 2002 |
| 2097 | Imperial Oil Com | | Oil & Gas Operator | Dec 1992 |
| 2098 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 2099 | Imperial Oil Properties, Inc. | Wichita, KS 67201 | Oil & Gas Operator | Jun 2006 |
| 2100 | Impetro Nonop LLC | | Oil Operator | Sep 2025 |