| 4801 | Harrell Operating Inc | Graham, TX 76450 | Oil & Gas Operator | Sep 2005 |
| 4802 | Harrell Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Jun 2008 |
| 4803 | Harrell, Charles | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 4804 | Harrier Holdings, LTD. | Burnet, TX 78611 | Oil Operator | Oct 2025 |
| 4805 | Harrigan Energy Partners, Inc. | Houston, TX 77058 | Oil & Gas Operator | Sep 2010 |
| 4806 | Harrigan Operating, LLC | Houston, TX 77258 | Oil & Gas Operator | Apr 2020 |
| 4807 | Harris Energy Partners Op, LLC | Fort Worth, TX 76116 | Oil Operator | Oct 2025 |
| 4808 | Harris Energy Services, LLC | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 4809 | Harris Oil & Gas Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2016 |
| 4810 | Harris, Jake, Trustee | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 2001 |
| 4811 | Harris, Sam E. | Albany, TX 76430 | Oil & Gas Operator | Aug 2003 |
| 4812 | Harrison Interests, LTD. | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 4813 | Harrison Oil & Gas Inc | Houston, TX 77019 | Oil & Gas Operator | Jun 2025 |
| 4814 | Harrison, Dan J III&Bruce F Est | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 4815 | Harrison, Dan J. III&Bruce F. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 4816 | Harrison, Sam G. Oil, Inc. | Houston, TX 77019 | Oil & Gas Operator | Nov 2019 |
| 4817 | Hart & McFarland | Vivian, LA 71082 | Oil & Gas Operator | Oct 2025 |
| 4818 | Hart Petroleum Services, Inc | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Jul 2025 |
| 4819 | Hartel, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Aug 1997 |
| 4820 | Harter, Ron | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 4821 | Hartoil Corporation | Post, TX 79356 | Oil & Gas Operator | Oct 2025 |
| 4822 | Harvard Petroleum Company, LLC | Roswell, NM 88202 | Oil & Gas Operator | Oct 2025 |
| 4823 | Harvard Petroleum Corporation | Roswell, NM 88201 | Oil & Gas Operator | Dec 2004 |
| 4824 | Harvest Operating Company, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Dec 1997 |
| 4825 | Harvest Petroleum Inc. | Frisco, TX 75033 | Oil & Gas Operator | Oct 2025 |
| 4826 | Harvey Brothers Oil & Gas | Corpus Chrsti, TX 78408 | Oil & Gas Operator | Jul 2004 |
| 4827 | Harvey, James W. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2008 |
| 4828 | Harvey, Mike W. Oil & Gas | Corpus Chrsti, TX 78408 | Oil & Gas Operator | Aug 2003 |
| 4829 | Harvey, Robert E., Jr. | Nixon, TX 78140 | Oil & Gas Operator | Oct 2003 |
| 4830 | Harvick Oil Co. | Albany, TX 76430 | Oil & Gas Operator | Feb 2009 |
| 4831 | Harvick, George R. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 4832 | Harwell Enterprises | Loveland, CO 80537 | Gas Operator | Nov 2019 |
| 4833 | Harwell Enterprises Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Jan 2005 |
| 4834 | Harwood Exploration, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Aug 1995 |
| 4835 | Haskit, Kendall | Kyle, TX 78640 | Oil & Gas Operator | Oct 2025 |
| 4836 | Hastings, J. W. Oil Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2010 |
| 4837 | Hat Creek Energy LLC | Denver, CO 80209 | Oil & Gas Operator | Jun 2019 |
| 4838 | Hat Oil & Gas, Inc. | Slaton, TX 79364 | Oil & Gas Operator | Feb 2002 |
| 4839 | Hatcher, Ray | Burkburnett, TX 76354 | Oil & Gas Operator | Jun 2002 |
| 4840 | Hatler Oil Company, Inc. | Graham, TX 76450 | Oil & Gas Operator | Sep 2000 |
| 4841 | Havens Oil Company | Early, TX 76803 | Oil & Gas Operator | Jul 2025 |
| 4842 | Haverkamp, Floyd | Muenster, TX 76252 | Oil & Gas Operator | Oct 2001 |
| 4843 | Havins Energy | Burkburnett, TX 76354 | Oil & Gas Operator | May 2006 |
| 4844 | Hawk Exploration And Production | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Oct 1995 |
| 4845 | Hawk Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Aug 2003 |
| 4846 | Hawk Petroleum, L L C | San Diego, TX 78384 | Oil & Gas Operator | Oct 2025 |
| 4847 | Hawk Well Service | Borger, TX 79007 | Oil & Gas Operator | Oct 2025 |
| 4848 | Hawk-Hill Operating Company, LLC | Plano, TX 75093 | Oil & Gas Operator | Jun 2009 |
| 4849 | Hawkbend LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 4850 | Hawkeye Drilling Co. | Waskom, TX 75692 | Oil & Gas Operator | Feb 2023 |
| 4851 | Hawkeye Transmission Company | Dallas, TX 75244 | Oil & Gas Operator | Jun 2000 |
| 4852 | Hawkins Energy Corporation | Austin, TX 78711 | Oil & Gas Operator | Apr 1997 |
| 4853 | Hawkins Oil & Gas Company | Richardson, TX 75080 | Oil & Gas Operator | Oct 2025 |
| 4854 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 4855 | Hawkins Oil, L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 4856 | Hawkins, B. O. | Aspermont, TX 79502 | Oil & Gas Operator | Oct 2025 |
| 4857 | Hawkins, G. A. | Graham, TX 76450 | Oil & Gas Operator | Dec 2013 |
| 4858 | Hawkwood Energy Operating, LLC | Houston, TX 77224 | Oil & Gas Operator | Apr 2022 |
| 4859 | Hawn Bros. & Venus Oil Co. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Aug 1995 |
| 4860 | Hawn Brothers | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2003 |
| 4861 | Hawn Brothers Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jan 2003 |
| 4862 | Hawthorn Energy Partners, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Oct 2025 |
| 4863 | Hawthorne Oil And Gas Corp. | Houston, TX 77227 | Oil & Gas Operator | Sep 1993 |
| 4864 | Hay Creek Investments, L.L.C. | Santa Anna, TX 76878 | Oil Operator | Jul 2018 |
| 4865 | Hayabusa Energy USA, LLC | Pampa, TX 79065 | Oil & Gas Operator | Oct 2025 |
| 4866 | Hayes Oil & Gas Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2005 |
| 4867 | Hayes, Marshall A. III | Chilton, TX 76632 | Oil & Gas Operator | Oct 2025 |
| 4868 | Haylan Oil Company | Midland, TX 79710 | Oil & Gas Operator | Jan 2000 |
| 4869 | Haynes & Shirley Production Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Oct 2025 |
| 4870 | Haynes Production Company, Inc. | Brownwood, TX 76801 | Oil & Gas Operator | Dec 2006 |
| 4871 | Haynie Drilling Co. Inc. | Corsicana, TX 75151 | Oil & Gas Operator | Dec 2011 |
| 4872 | Haynie Energy Services LLC | Wortham, TX 76693 | Oil Operator | Oct 2025 |
| 4873 | Hays & Boydston | Graham, TX 76450 | Oil & Gas Operator | Mar 1994 |
| 4874 | Hays & Croker Partnership | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 4875 | Hays Partnership | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 4876 | Hays, David H. | Olney, TX 76374 | Oil & Gas Operator | Dec 1995 |
| 4877 | Hays, John H. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 4878 | Hays, Mrs. Earl (Cora) | Big Spring, TX 79720 | Oil & Gas Operator | Apr 2005 |
| 4879 | Hays, T.G. Petroleum Expl., Inc. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Dec 1994 |
| 4880 | Haywood, Paul M. Jr. | Denton, TX 76206 | Oil & Gas Operator | Mar 2002 |
| 4881 | Hazelett Oil Company, Inc. | Dale, TX 78616 | Oil & Gas Operator | Sep 2005 |
| 4882 | Hazelett Oil, Inc. | Dale, TX 78616 | Oil & Gas Operator | Aug 2024 |
| 4883 | Hazoco, L.L.C. | Bellville, TX 77418 | Oil Operator | Oct 2025 |
| 4884 | HB Oil Company | Abilene, TX 79602 | Oil & Gas Operator | Jun 2023 |
| 4885 | HBC Oil Company, LLC | San Antonio, TX 78266 | Oil Operator | Oct 2025 |
| 4886 | Hce Operating LLC | Smyer, TX 79367 | Oil & Gas Operator | Oct 2025 |
| 4887 | HCM | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 4888 | HD Special-Situations, LP | San Francisco, CA 94111 | Oil & Gas Operator | Feb 2014 |
| 4889 | Headington Energy Partners, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2025 |
| 4890 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 4891 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 4892 | Headington Oil Company, L.P. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2008 |
| 4893 | Headline Resources, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Aug 1997 |
| 4894 | Headwaters Energy Partners, LLC | Dripping SPGS, TX 78620 | Oil & Gas Operator | Oct 2025 |
| 4895 | Heape Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Dec 2020 |
| 4896 | Heape, Gene G. | Dallas, TX 75367 | Oil & Gas Operator | Jun 2003 |
| 4897 | Heart Land Petroleum Corporation | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 4898 | Heartland Production, Inc. | Cuero, TX 77954 | Oil & Gas Operator | Oct 2025 |
| 4899 | Heartland Resources, Inc. | Temple, TX 76501 | Oil & Gas Operator | Mar 2008 |
| 4900 | Hebron Energy, LLC | Dallas, TX 75206 | Oil Operator | Jul 2018 |