| 13101 | Heritage Oil Company | Norman, OK 73070 | Oil & Gas Operator | Jul 2008 |
| 13102 | Heritage Oil L.L.C. | Hays, KS 67601 | Oil Operator | Jan 2025 |
| 13103 | Heritage Operating Co., Inc. The | Stafford, TX 77497 | Oil & Gas Operator | May 1997 |
| 13104 | Heritage Petroleum Corporation | Cleburne, TX 76033 | Oil & Gas Operator | May 2025 |
| 13105 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | May 2025 |
| 13106 | Heritage Resources, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Feb 2014 |
| 13107 | Heritage Standard Corporation | Dallas, TX 75206 | Oil & Gas Operator | May 2025 |
| 13108 | Herley Olive Holdings LLC | | Oil & Gas Operator | Mar 2025 |
| 13109 | Herley Petroleum | | Oil & Gas Operator | Dec 1997 |
| 13110 | Herley-Kelley LLC | | Oil & Gas Operator | Mar 2025 |
| 13111 | Herlihy, John D. | | Oil & Gas Operator | May 1997 |
| 13112 | Herlin Et Al | | Oil & Gas Operator | Mar 1985 |
| 13113 | Herlindah Gallegos | | Oil Operator | Dec 2007 |
| 13114 | Herman Fields | | Oil & Gas Operator | May 1989 |
| 13115 | Herman J Ledbetter | Abilene, TX 79606 | Oil & Gas Operator | Jul 1999 |
| 13116 | Herman Krug - Oil Operations | | Oil Operator | Jan 2025 |
| 13117 | Herman L Loeb | Lawrenceville, IL 62439 | Oil & Gas Operator | Jul 2009 |
| 13118 | Herman L. Loeb, LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Jan 2025 |
| 13119 | Herman Lang Oil And Gas Co. | | Oil & Gas Operator | Dec 1992 |
| 13120 | Herman Riemer Gas Co | Sarver, PA 16055-8507 | Oil & Gas Operator | Dec 2016 |
| 13121 | Herman V Wallis | Kerrville, TX 780281858 | Gas Operator | Feb 2003 |
| 13122 | Herman'S Supply Company | West Seneca, NY 14224 | Gas Operator | Dec 2023 |
| 13123 | Hermat Salt Water Disposal, Inc. | Corpus Chrsti, TX 78426 | Oil Operator | Aug 2012 |
| 13124 | Hermes, A. J. | Lindsay, TX 76250 | Oil & Gas Operator | Mar 2018 |
| 13125 | Hermreck Oil Com | | Oil & Gas Operator | Aug 1996 |
| 13126 | Hermreck Oil Company | | Oil Operator | Nov 2024 |
| 13127 | Herms, Walter | Luling, TX 78648 | Oil & Gas Operator | Sep 2002 |
| 13128 | Herod Investments, Inc. | Ranger, TX 76470 | Oil & Gas Operator | Jul 1999 |
| 13129 | Herod, Bill | Ranger, TX 76470 | Oil & Gas Operator | Apr 2022 |
| 13130 | Heron Operating, LLC | | Oil & Gas Operator | Mar 2025 |
| 13131 | Herricks Oil Co. | San Angelo, TX 76906 | Oil & Gas Operator | Jan 2010 |
| 13132 | Herring Production Co | | Oil & Gas Operator | Mar 1992 |
| 13133 | Herring, Casey Oil Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Nov 2008 |
| 13134 | Herring, D Oil & Gas Co. | Santa Anna, TX 76878 | Oil & Gas Operator | May 2025 |
| 13135 | Herring, Ray | Graham, TX 76450 | Oil & Gas Operator | Jul 2014 |
| 13136 | Herrman & Ikenberry | Cushing, OK 74023-0247 | Oil & Gas Operator | Dec 2003 |
| 13137 | Herrmann Arnold | Chandler, OK 74834 | Oil & Gas Operator | Sep 2024 |
| 13138 | Herrmann Energy | Amarillo, TX 79159 | Oil & Gas Operator | May 2015 |
| 13139 | Herrmann J B Oil And Gas | Amarillo, TX 79159-0670 | Oil & Gas Operator | Feb 2015 |
| 13140 | Herrmann, J.B. | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2019 |
| 13141 | Herrmann, S. W. Oil & Gas | Amarillo, TX 79159 | Oil & Gas Operator | May 2025 |
| 13142 | Herschap Bros. | Bruni, TX 78344 | Oil & Gas Operator | May 2025 |
| 13143 | Hershey Oil | Pasadena, CA 91103 | Oil & Gas Operator | Dec 1988 |
| 13144 | Hershey Oil Corporation | Seminole, TX 79360 | Oil & Gas Operator | Jul 1992 |
| 13145 | Hertel Oil Company | | Oil Operator | Nov 2018 |
| 13146 | Hertel Oil Company LLC | Hays, KS 67601 | Oil Operator | Jan 2025 |
| 13147 | Herv Oil, LLC | Oklahoma City, OK 73116 | Oil Operator | Mar 2025 |
| 13148 | Herzfeld Fabricators Inc | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2017 |
| 13149 | Hesperus Energy II LLC | | Oil Operator | Feb 2025 |
| 13150 | Hess Bakken Investments II, LLC | | Oil & Gas Operator | Mar 2025 |
| 13151 | Hess Bros. DRLG. Co. | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2008 |
| 13152 | Hess Co2 Resources LLC | Seminole, TX 79360 | Gas Operator | Aug 2017 |
| 13153 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 13154 | Hess Corporation, A De Corp. | | Oil & Gas Operator | Oct 2006 |
| 13155 | Hess Ohio Developments LLC | Houston, TX 77010 | Oil & Gas Operator | Sep 2018 |
| 13156 | Hess Ohio Resources LLC | Houston, TX 77010 | Oil & Gas Operator | Jun 2014 |
| 13157 | Hess Oil Company | McPherson, KS 67460 | Oil & Gas Operator | Jan 2025 |
| 13158 | Hess Production | Quitaque, TX 79255 | Oil & Gas Operator | May 2025 |
| 13159 | Hess Seminole Assets LLC | Seminole, TX 79360 | Oil & Gas Operator | Aug 2017 |
| 13160 | Hess, Jay E. | Andover, NY 14806 | Oil & Gas Operator | Dec 2023 |
| 13161 | Hess, Jerry Operating Co. | Muenster, TX 76252 | Oil & Gas Operator | May 2025 |
| 13162 | Hesse Petroleum Co.,L.L.C. | Wichita, KS 67208 | Oil & Gas Operator | Jan 2025 |
| 13163 | Hessert Edward C | | Oil & Gas Operator | Sep 1993 |
| 13164 | Hessert Loc Inc | Carl Junction, MO 64834 | Oil Operator | Dec 2009 |
| 13165 | Hester Jr J C | Lawton, OK 73502-1887 | Oil & Gas Operator | Oct 1997 |
| 13166 | Hester, Harold & Betty | Bowling Green, KY 42101 | Oil Operator | Dec 2023 |
| 13167 | Heston Oil Company | Tulsa, OK 74108 | Oil & Gas Operator | Mar 2005 |
| 13168 | Hett Oil & Gas, LLC | Lincolnville, KS 66858 | Oil & Gas Operator | Jan 2025 |
| 13169 | Heuston Oil LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Apr 2020 |
| 13170 | Hewitt Energy Group, Inc. | Salt Lake City, UT 84111 | Oil & Gas Operator | Apr 2015 |
| 13171 | Hewitt Oil, LLC | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2023 |
| 13172 | Hewitt, Alan P. | Midland, TX 79702 | Oil & Gas Operator | Aug 1997 |
| 13173 | Hewitt, Douglas R | | Oil Operator | Jul 2024 |
| 13174 | Hewitt, Robert J. | Victoria, TX 77901 | Oil & Gas Operator | Jun 2004 |
| 13175 | Hexadyne Energy Corp. | | Oil & Gas Operator | Dec 2013 |
| 13176 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | May 2025 |
| 13177 | Hexp Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | May 2025 |
| 13178 | Heydrick Petroleum Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 13179 | Hez Petroleum Company | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 13180 | HG Energy II Appalachia, LLC | | Oil & Gas Operator | Mar 2022 |
| 13181 | HG Energy LLC | Parkersburg, WV 26101 | Oil & Gas Operator | Dec 2021 |
| 13182 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Jan 2025 |
| 13183 | HG Operating LLC | Plano, TX 75026 | Oil & Gas Operator | May 2025 |
| 13184 | HGB Oil Company | Denver, CO 80224 | Oil Operator | Mar 2006 |
| 13185 | HGH Energy, Inc. | | Oil & Gas Operator | Jun 2001 |
| 13186 | Hgi Corporation | Nada, TX 77460 | Oil & Gas Operator | Apr 2016 |
| 13187 | HGN Operating Co. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 13188 | HGN Operating I, LLC | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 13189 | HH&F Partners | Katy, TX 77450 | Oil & Gas Operator | Sep 2019 |
| 13190 | HHH & G Oil Co | Owasso, OK 74055 | Oil Operator | Jun 2020 |
| 13191 | HHL Development Inc | Garber, OK 73738 | Oil & Gas Operator | Jan 2025 |
| 13192 | Hi - Mountain Energy Corporation | Odessa, TX 79762 | Oil & Gas Operator | May 2025 |
| 13193 | Hi Plains Hydrocarbons, Inc. | Sunray, TX 79086 | Oil & Gas Operator | Oct 2002 |
| 13194 | Hi Snyder/Snyder Oil & Gas Inc | Dover, OH 44622 | Oil & Gas Operator | Dec 2019 |
| 13195 | Hi-Kat Petroleum | | Oil Operator | Mar 1990 |
| 13196 | Hi-Kat Petroleum Company | Liberal, KS 67905-1261 | Oil & Gas Operator | May 2014 |
| 13197 | Hi-Mi Exploration, LLC | Alvaton, KY 42122 | Oil & Gas Operator | Dec 2022 |
| 13198 | Hi-Pro Production | Gillette, WY 82717 | Gas Operator | Nov 2003 |
| 13199 | Hiawatha Exploration Company | Oklahoma City, OK 73116-7326 | Oil & Gas Operator | Mar 2009 |
| 13200 | Hibbard Energy, LP | Whitehouse, TX 75791 | Oil & Gas Operator | May 2025 |