| 13901 | HRL Oilfields In | | Oil Operator | Jun 1998 |
| 13902 | HRM Resources II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 13903 | HRM Resources III LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2022 |
| 13904 | HRM Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2015 |
| 13905 | Hronek, Kenneth | Caldwell, TX 77836 | Oil & Gas Operator | Apr 2025 |
| 13906 | Hrubetz Oil Co. | Dallas, TX 75225 | Oil Operator | Sep 1986 |
| 13907 | Hrubetz Operating Company | Dallas, TX 75225 | Oil & Gas Operator | Feb 1999 |
| 13908 | HS Resources | Tulsa, OK 74136 | Oil & Gas Operator | Aug 1997 |
| 13909 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 13910 | Hsumy Oil & Gas Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2007 |
| 13911 | HTC Gas Company, LLC | Hindman, KY 41822 | Gas Operator | Dec 2023 |
| 13912 | HTR Operating Co., Inc. | Hurst, TX 76053 | Oil & Gas Operator | Apr 2025 |
| 13913 | Hub Oil Company | | Oil Operator | Jan 1990 |
| 13914 | Hub-Cap Oil Company | Arlington, TX 76016 | Oil & Gas Operator | Dec 2013 |
| 13915 | Hub-Hill Inc | San Antonio, TX 78230 | Oil Operator | Nov 1998 |
| 13916 | Hubbard Creek Coal Gas LLC | | Gas Operator | Mar 2025 |
| 13917 | Hubbard Operating | Ozona, TX 76943 | Gas Operator | Apr 2025 |
| 13918 | Hubbs III, LLC | | Oil & Gas Operator | Mar 2024 |
| 13919 | Hubcap Oil, LLC | Boerne, TX 78015 | Oil Operator | Apr 2025 |
| 13920 | Hubco Exploration Inc. | Houston, TX 77073 | Oil & Gas Operator | Sep 2002 |
| 13921 | Huber Corporation* J M | | Oil & Gas Operator | Feb 2008 |
| 13922 | Huber Energy L.P. | Houston, TX 77079 | Oil & Gas Operator | Feb 2007 |
| 13923 | Huber Energy Panhandle LP | Houston, TX 77079 | Oil & Gas Operator | Oct 2005 |
| 13924 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Apr 2025 |
| 13925 | Huber J M Corpor | | Oil & Gas Operator | Dec 1996 |
| 13926 | Huber Oil Company, A General Partnership | Madison, KS 66860 | Oil & Gas Operator | Nov 2024 |
| 13927 | Hubl/Harbin | | Oil Operator | Dec 1994 |
| 13928 | Hubler John | Tulsa, OK 74133-2716 | Oil & Gas Operator | Mar 2015 |
| 13929 | Huck Farms LLC | Stratford, OK 74872 | Oil & Gas Operator | Jan 2025 |
| 13930 | Huddleston Oil And Gas Company | Millsap, TX 76066 | Gas Operator | Dec 2002 |
| 13931 | Hudgens Lester E | Bartlesville, OK 74006-0215 | Oil Operator | Mar 2015 |
| 13932 | Hudgens Operating Co., Inc. | Abilene, TX 79603 | Oil & Gas Operator | Jul 1995 |
| 13933 | Hudson Brothers Mining Co., Inc. | Cisco, TX 76437 | Oil & Gas Operator | Jun 1994 |
| 13934 | Hudson Brothers, Inc. | Hutchinson, KS 67501 | Oil & Gas Operator | Jun 2007 |
| 13935 | Hudson Energy LLC | Bartlesville, OK 74006 | Oil Operator | Nov 2024 |
| 13936 | Hudson Group LLC | Casper, WY 82601 | Oil & Gas Operator | Feb 2025 |
| 13937 | Hudson Oil Company Of Texas | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2025 |
| 13938 | Hudson, Comer Oil & Gas | Cisco, TX 76437 | Oil & Gas Operator | Jan 2003 |
| 13939 | Huey Dean | | Oil Operator | Oct 2000 |
| 13940 | Hueysville Gas Co | Eastern, KY 41622 | Gas Operator | Dec 2014 |
| 13941 | Hufco, Incorporated | | Oil & Gas Operator | Dec 2020 |
| 13942 | Huff Minerals, LTD. | Amarillo, TX 79101 | Gas Operator | Apr 2025 |
| 13943 | Huff, Jack | Midland, TX 79710 | Oil & Gas Operator | Dec 2004 |
| 13944 | Huffco Petroleum Corporation | | Oil & Gas Operator | Jul 1988 |
| 13945 | Huffman Arthur | Waynesburg, PA 15370-1437 | Gas Operator | Dec 2024 |
| 13946 | Huffman, H. L., LTD. | Fort Worth, TX 76113 | Oil & Gas Operator | Sep 1994 |
| 13947 | Huffman-Bowers Inc | New Lexington, OH 43764 | Oil & Gas Operator | Dec 2024 |
| 13948 | Hufo Production Corporation | Midland, TX 79702 | Oil & Gas Operator | Jul 2002 |
| 13949 | Huggs & McConathy,Et Al | | Oil & Gas Operator | Dec 1985 |
| 13950 | Huggs Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2003 |
| 13951 | Huggs Inc. & Bec, Et Al | | Oil & Gas Operator | Feb 1998 |
| 13952 | Huggs Incorporated, Et Al | | Oil & Gas Operator | Feb 1998 |
| 13953 | Hugh A. Hawthorne, Et Al | | Oil & Gas Operator | Dec 1978 |
| 13954 | Hughes & Hughes | | Oil & Gas Operator | May 1984 |
| 13955 | Hughes & New Oil Co. | | Oil Operator | Jul 1993 |
| 13956 | Hughes & New-D. Braswell | | Oil & Gas Operator | Jun 1983 |
| 13957 | Hughes & Patterson Oper. Corp. | Albany, TX 76430 | Oil & Gas Operator | Apr 2025 |
| 13958 | Hughes & Shawver | Olney, TX 76374 | Oil & Gas Operator | Aug 1996 |
| 13959 | Hughes Denny Offshore Expl Inc | | Oil & Gas Operator | Nov 1988 |
| 13960 | Hughes Drilling Co, A General Partnership | Wellsville, KS 66092 | Oil Operator | Dec 2024 |
| 13961 | Hughes Drilling Co. | Enid, OK 73702 | Oil & Gas Operator | Apr 1998 |
| 13962 | Hughes Eastern Corporation | Ridgeland, MS 39157 | Oil & Gas Operator | Feb 2025 |
| 13963 | Hughes Eastern Petroleum, Inc. | | Oil & Gas Operator | Apr 1993 |
| 13964 | Hughes Eastern Petroleum, LTD. | | Oil & Gas Operator | Jun 1986 |
| 13965 | Hughes Gas Systems LLC | Dallas, TX 75214 | Oil & Gas Operator | Jan 2025 |
| 13966 | Hughes George B | Asher, OK 74826-0165 | Oil & Gas Operator | Mar 2011 |
| 13967 | Hughes Legacy LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2022 |
| 13968 | Hughes Oil Company Inc | Odessa, TX 79765 | Oil & Gas Operator | Feb 2004 |
| 13969 | Hughes Petroleum Corp. | | Oil Operator | Dec 1972 |
| 13970 | Hughes River Oil & Gas Company | Walker, WV 26180-0000 | Oil & Gas Operator | Dec 2021 |
| 13971 | Hughes Services, LLC | Wellsville, KS 66092 | Oil Operator | Dec 2024 |
| 13972 | Hughes Supplies, Inc. | Greenwood, LA 71033 | Oil & Gas Operator | Jul 2019 |
| 13973 | Hughes, Bill Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 13974 | Hughes, Bob Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | Jul 2011 |
| 13975 | Hughes, Dan A. Company | Beeville, TX 78104 | Oil & Gas Operator | May 2006 |
| 13976 | Hughes, Dan A. Company, L.P. | Beeville, TX 78104 | Oil & Gas Operator | Apr 2025 |
| 13977 | Hughes, Wise & Assoc., Inc | | Oil Operator | Jul 1987 |
| 13978 | Hughes-Denny Petroleum Co.,Inc | | Oil & Gas Operator | Dec 1987 |
| 13979 | Hughes-Leckelt-Maybrier PRDCRS | | Oil Operator | Mar 2022 |
| 13980 | Hughes-Nicklaus Oil Co., LTD. | | Oil & Gas Operator | Feb 1986 |
| 13981 | Hughey, Gaylord T. SR. Oper. Co. | Tyler, TX 75711 | Oil & Gas Operator | Feb 1998 |
| 13982 | Hughey, W. R., Operating Co. | Tyler, TX 75711 | Oil & Gas Operator | Feb 2005 |
| 13983 | Hugoton Energy C | | Oil & Gas Operator | Feb 2004 |
| 13984 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 13985 | Hugoton Operating Company, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Apr 2025 |
| 13986 | Hugus Investment Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Apr 2025 |
| 13987 | Huitt Joe A | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 13988 | Huitt Joe A Rev Trust | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2009 |
| 13989 | Hulen Operating Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Apr 2025 |
| 13990 | Hull Enterprises Inc | Broken Arrow, OK 74012 | Oil & Gas Operator | Sep 2023 |
| 13991 | Hull Oil Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2021 |
| 13992 | Hull, Gerald Walter | Leicester, NY 14481 | Gas Operator | Dec 2023 |
| 13993 | Hulse Steve & Frank | Pawhuska, OK 74056 | Oil & Gas Operator | Aug 2000 |
| 13994 | Hulse, J. T. | Archer City, TX 76351 | Oil & Gas Operator | Apr 2025 |
| 13995 | Hulse, Tommy P. | Archer City, TX 76351 | Oil & Gas Operator | Feb 2009 |
| 13996 | Hulsebosch, Jessica | Elmira, NY 14901 | Gas Operator | Dec 2023 |
| 13997 | Hulsey Larry O & Co | Graham, TX 76046 | Oil & Gas Operator | Jun 2012 |
| 13998 | Hulsey Oil Company | Dallas, TX 75205 | Oil & Gas Operator | Aug 1999 |
| 13999 | Humak Processors, Inc. | Tyler, TX 75710 | Oil & Gas Operator | Aug 2005 |
| 14000 | Humber Oil Company | Albany, TX 76430 | Oil & Gas Operator | Apr 2025 |