| 5101 | Holler Oil Co. | San Angelo, TX 76906 | Oil & Gas Operator | Aug 2003 |
| 5102 | Holley Oil Company, LLC | Chappell Hill, TX 77426 | Oil & Gas Operator | Oct 2025 |
| 5103 | Holley Operating, L. L. C. | Abilene, TX 79601 | Oil Operator | Jul 2025 |
| 5104 | Holli-Tex Supply Co. | Holliday, TX 76366 | Oil & Gas Operator | May 2018 |
| 5105 | Holliday CSG Corp. | Holliday, TX 76366 | Oil & Gas Operator | Oct 2025 |
| 5106 | Holliday Drilling, Inc. | Stephenville, TX 76401 | Oil & Gas Operator | Dec 2020 |
| 5107 | Hollimon Oil Corporation | Castroville, TX 78009 | Oil & Gas Operator | Nov 2016 |
| 5108 | Holloway Oil Company | Austin, TX 78764 | Oil & Gas Operator | Feb 2004 |
| 5109 | Hollub Production Company | Seguin, TX 78156 | Oil & Gas Operator | Jul 2000 |
| 5110 | Hollub, Lambert Drilling Company | Seguin, TX 78155 | Oil & Gas Operator | Oct 2025 |
| 5111 | Holly Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Nov 2008 |
| 5112 | Holmac Oil Company | Hobbs, NM 88240 | Oil & Gas Operator | May 1996 |
| 5113 | Holmes Exploration, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2015 |
| 5114 | Holson Well Service | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 5115 | Holt Brothers | Gruver, TX 79040 | Gas Operator | Oct 2025 |
| 5116 | Holt Oil And Cattle LLC | Bedias, TX 77831 | Oil & Gas Operator | Oct 2025 |
| 5117 | Hombre Oil Co., LTD. | Tyler, TX 75713 | Oil & Gas Operator | Apr 2021 |
| 5118 | Home Petroleum Corp | Victoria, TX 77902 | Oil & Gas Operator | Oct 2025 |
| 5119 | Home-Stake Oil & Gas Company | Plano, TX 75093 | Oil & Gas Operator | Jul 2025 |
| 5120 | Home-Stake Royalty Corp., The | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2014 |
| 5121 | Homeplace Oil And Gas | Caldwell, TX 77836 | Oil & Gas Operator | Feb 2021 |
| 5122 | Hominy Consulting, LLC | Canadian, TX 79014 | Oil & Gas Operator | Oct 2025 |
| 5123 | Hondo Drilling Company | Midland, TX 79702 | Oil & Gas Operator | Nov 1996 |
| 5124 | Honeck Oil Company | Austin, TX 78716 | Oil & Gas Operator | Mar 2008 |
| 5125 | Honeck Oil Company, LP | Austin, TX 78716 | Oil & Gas Operator | Dec 2010 |
| 5126 | Hood, J. F. | Holliday, TX 76366 | Oil & Gas Operator | Apr 2010 |
| 5127 | Hood, J. Frank, Jr. | Arlington, TX 76006 | Oil & Gas Operator | Oct 2025 |
| 5128 | Hood, Joe B. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2008 |
| 5129 | Hooks & Hooks | Abilene, TX 79608 | Oil & Gas Operator | Feb 1999 |
| 5130 | Hooper & Sons Investments Co.Inc | Tenaha, TX 75974 | Gas Operator | Nov 1997 |
| 5131 | Hooper, DR. Oil & Royalty Co. | Conroe, TX 77304 | Oil & Gas Operator | Sep 1999 |
| 5132 | Hootkins, Seymour G. | Archer City, TX 76351 | Oil & Gas Operator | Apr 1997 |
| 5133 | Hoover Petroleum Company, LLC | Midland, TX 79701 | Oil Operator | Oct 2025 |
| 5134 | Hopco Operating, Inc. | Stafford, TX 77497 | Oil & Gas Operator | Dec 2016 |
| 5135 | Hope Energy, L.L.C. | Snyder, TX 79549 | Oil & Gas Operator | Oct 2025 |
| 5136 | Hope Production, Inc. | Edinburg, TX 78540 | Oil & Gas Operator | Jan 2000 |
| 5137 | Hopewell Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 5138 | Hopkins Engineering, Inc. | Houston, TX 77046 | Oil & Gas Operator | Sep 1996 |
| 5139 | Hopkins, T. M. Operating Co. | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 5140 | Hopper, Harlan | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 5141 | Hopper, Thornton Co. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 5142 | Horadam, Henry L. | Victoria, TX 77905 | Oil & Gas Operator | Oct 2008 |
| 5143 | Horan, Ken L. | Cross Plains, TX 76443 | Gas Operator | May 2002 |
| 5144 | Horansky Burrell Revocable Trust | Wichita Falls, TX 76309 | Oil Operator | Oct 2025 |
| 5145 | Horany, Ray & Ernest | Olney, TX 76374 | Oil & Gas Operator | May 2002 |
| 5146 | Horizon Energy | Vergas, MN 56587 | Oil & Gas Operator | Oct 2025 |
| 5147 | Horizon Exploration Company | Houston, TX 77019 | Oil & Gas Operator | Aug 2002 |
| 5148 | Horizon Exploration Services | El Paso, TX 79922 | Oil Operator | Oct 2025 |
| 5149 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2024 |
| 5150 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |
| 5151 | Horizon Oil & Gas Co. | Dallas, TX 75221 | Oil & Gas Operator | Jan 2005 |
| 5152 | Horizon Prod. And Operating, LLC | Houston, TX 77019 | Oil & Gas Operator | Oct 2025 |
| 5153 | Horizon Ridge Oil Company | Austin, TX 78738 | Oil Operator | Oct 2025 |
| 5154 | Horizon Well Services, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 5155 | Horn Energy | Eastland, TX 76448 | Oil & Gas Operator | Oct 2025 |
| 5156 | Horn, W. J. | Graham, TX 76450 | Oil & Gas Operator | Oct 2004 |
| 5157 | Horne & Moore Oil Co. | Holliday, TX 76366 | Oil & Gas Operator | Feb 2001 |
| 5158 | Horseshoe Production, LLC | Bryson, TX 76427 | Oil Operator | Oct 2025 |
| 5159 | Horst Energy LLC | Fort Worth, TX 76124 | Oil & Gas Operator | Jun 2019 |
| 5160 | Hosford Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 1994 |
| 5161 | Hou-Tex, Inc. | Houston, TX 77224 | Oil & Gas Operator | Jun 2001 |
| 5162 | Houchin, O. E. Inc. | Olney, IL 62450 | Oil & Gas Operator | Feb 1997 |
| 5163 | Houghton Oil & Gas, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2009 |
| 5164 | Houston Energy Operating, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jul 2020 |
| 5165 | Houston Energy, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2014 |
| 5166 | Houston Expl. & Prod. Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Aug 2003 |
| 5167 | Houston Exploration Co, The | Houston, TX 77002 | Oil & Gas Operator | Apr 2017 |
| 5168 | Houston Gulf Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2025 |
| 5169 | Houston Hydrocarbons, Inc. (A) | Houston, TX 77042 | Oil & Gas Operator | Sep 2004 |
| 5170 | Houston Oil & Gas Company, Inc. | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 5171 | Houston Oil & Minerals Corp. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 5172 | Houston Oil Prod Enterprises,Inc | Houston, TX 77006 | Oil & Gas Operator | Oct 2025 |
| 5173 | Houston Operating, Inc. | Houston, TX 77027 | Oil & Gas Operator | Oct 2025 |
| 5174 | Houston Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | Oct 2025 |
| 5175 | Houston Resources Corp. | Houston, TX 77002 | Oil & Gas Operator | Apr 2003 |
| 5176 | Houtchens, D. D. | Gainesville, TX 76240 | Oil & Gas Operator | Oct 2025 |
| 5177 | Houtchens, DD & Anna D LVNG TRST | Garland, TX 75043 | Oil Operator | Jun 2025 |
| 5178 | Hovgard & Fitzgerald | Abilene, TX 79608 | Oil & Gas Operator | Mar 1996 |
| 5179 | Howard Exploration, Inc. | Houston, TX 77069 | Oil & Gas Operator | Oct 2025 |
| 5180 | Howard Operating Co. | Saint Jo, TX 76265 | Oil & Gas Operator | Oct 2025 |
| 5181 | Howard, Anthony E. F. | Tyler, TX 75701 | Oil & Gas Operator | Jun 2001 |
| 5182 | Howard, Douglas J. | Houston, TX 77070 | Oil & Gas Operator | Mar 2008 |
| 5183 | Howell & Sandlin, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Jan 2001 |
| 5184 | Howell Crane & Rigging, Inc. | San Antonio, TX 78220 | Oil Operator | Oct 2025 |
| 5185 | Howell Drilling, Inc. | San Antonio, TX 78230 | Oil & Gas Operator | Aug 2003 |
| 5186 | Howell Oil & Gas, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Oct 2019 |
| 5187 | Howell Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Oct 2015 |
| 5188 | Howell, Ray | Breckenridge, TX 76424 | Oil & Gas Operator | May 1998 |
| 5189 | Howitzer Operating, LLC | Dallas, TX 75380 | Oil Operator | Oct 2025 |
| 5190 | Howle Operating Account, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 1999 |
| 5191 | Howle, A.G. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2011 |
| 5192 | HPC Energy LLC | Midland, TX 79703 | Oil & Gas Operator | Aug 2013 |
| 5193 | HPC Operating, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Mar 2008 |
| 5194 | HPPC, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 2023 |
| 5195 | HR Petroleum | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Apr 1998 |
| 5196 | HRB Oil | Houston, TX 77042 | Oil & Gas Operator | Oct 1998 |
| 5197 | HRB Operating Company, Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Oct 2025 |
| 5198 | Hrbacek Oil Corp. | La Grange, TX 78945 | Oil & Gas Operator | Feb 2004 |
| 5199 | HRF Exploration & Production LLC | Gaylord, MI 49734-0160 | Gas Operator | Oct 2025 |
| 5200 | HRF Exploration & Production,Inc | Denver, CO 80237 | Oil & Gas Operator | Mar 2009 |