| 13101 | Herring, D Oil & Gas Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Jun 2025 |
| 13102 | Herring, Ray | Graham, TX 76450 | Oil & Gas Operator | Jul 2014 |
| 13103 | Herrman & Ikenberry | Cushing, OK 74023-0247 | Oil & Gas Operator | Dec 2003 |
| 13104 | Herrmann Arnold | Chandler, OK 74834 | Oil & Gas Operator | Sep 2024 |
| 13105 | Herrmann Energy | Amarillo, TX 79159 | Oil & Gas Operator | May 2015 |
| 13106 | Herrmann J B Oil And Gas | Amarillo, TX 79159-0670 | Oil & Gas Operator | Feb 2015 |
| 13107 | Herrmann, J.B. | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2019 |
| 13108 | Herrmann, S. W. Oil & Gas | Amarillo, TX 79159 | Oil & Gas Operator | Jun 2025 |
| 13109 | Herschap Bros. | Bruni, TX 78344 | Oil & Gas Operator | Jun 2025 |
| 13110 | Hershey Oil | Pasadena, CA 91103 | Oil & Gas Operator | Dec 1988 |
| 13111 | Hershey Oil Corporation | Seminole, TX 79360 | Oil & Gas Operator | Jul 1992 |
| 13112 | Hertel Oil Company | | Oil Operator | Nov 2018 |
| 13113 | Hertel Oil Company LLC | Hays, KS 67601 | Oil Operator | Feb 2025 |
| 13114 | Herv Oil, LLC | Oklahoma City, OK 73116 | Oil Operator | Apr 2025 |
| 13115 | Herzfeld Fabricators Inc | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2017 |
| 13116 | Hesperus Energy II LLC | | Oil Operator | Mar 2025 |
| 13117 | Hess Bakken Investments II, LLC | | Oil & Gas Operator | Apr 2025 |
| 13118 | Hess Bros. DRLG. Co. | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2008 |
| 13119 | Hess Co2 Resources LLC | Seminole, TX 79360 | Gas Operator | Aug 2017 |
| 13120 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 13121 | Hess Corporation, A De Corp. | | Oil & Gas Operator | Oct 2006 |
| 13122 | Hess Ohio Developments LLC | Houston, TX 77010 | Oil & Gas Operator | Sep 2018 |
| 13123 | Hess Ohio Resources LLC | Houston, TX 77010 | Oil & Gas Operator | Jun 2014 |
| 13124 | Hess Oil Company | McPherson, KS 67460 | Oil & Gas Operator | Feb 2025 |
| 13125 | Hess Production | Quitaque, TX 79255 | Oil & Gas Operator | Jun 2025 |
| 13126 | Hess Seminole Assets LLC | Seminole, TX 79360 | Oil & Gas Operator | Aug 2017 |
| 13127 | Hess, Jay E. | Andover, NY 14806 | Oil & Gas Operator | Dec 2023 |
| 13128 | Hess, Jerry Operating Co. | Muenster, TX 76252 | Oil & Gas Operator | Jun 2025 |
| 13129 | Hesse Petroleum Co.,L.L.C. | Wichita, KS 67208 | Oil & Gas Operator | Feb 2025 |
| 13130 | Hessert Edward C | | Oil & Gas Operator | Sep 1993 |
| 13131 | Hessert Loc Inc | Carl Junction, MO 64834 | Oil Operator | Dec 2009 |
| 13132 | Hester Jr J C | Lawton, OK 73502-1887 | Oil & Gas Operator | Oct 1997 |
| 13133 | Hester, Harold & Betty | Bowling Green, KY 42101 | Oil Operator | Dec 2023 |
| 13134 | Heston Oil Company | Tulsa, OK 74108 | Oil & Gas Operator | Mar 2005 |
| 13135 | Hett Oil & Gas, LLC | Lincolnville, KS 66858 | Oil & Gas Operator | Feb 2025 |
| 13136 | Heuston Oil LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Apr 2020 |
| 13137 | Hewitt Energy Group, Inc. | Salt Lake City, UT 84111 | Oil & Gas Operator | Apr 2015 |
| 13138 | Hewitt Oil, LLC | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2023 |
| 13139 | Hewitt, Alan P. | Midland, TX 79702 | Oil & Gas Operator | Aug 1997 |
| 13140 | Hewitt, Douglas R | | Oil Operator | Jul 2024 |
| 13141 | Hewitt, Robert J. | Victoria, TX 77901 | Oil & Gas Operator | Jun 2004 |
| 13142 | Hexadyne Energy Corp. | | Oil & Gas Operator | Dec 2013 |
| 13143 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Jun 2025 |
| 13144 | Hexp Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Jun 2025 |
| 13145 | Heydrick Petroleum Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2025 |
| 13146 | Hez Petroleum Company | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 13147 | HG Energy II Appalachia, LLC | | Oil & Gas Operator | Mar 2022 |
| 13148 | HG Energy LLC | Parkersburg, WV 26101 | Oil & Gas Operator | Dec 2021 |
| 13149 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Feb 2025 |
| 13150 | HG Operating LLC | Plano, TX 75026 | Oil & Gas Operator | Jun 2025 |
| 13151 | HGB Oil Company | Denver, CO 80224 | Oil Operator | Mar 2006 |
| 13152 | HGH Energy, Inc. | | Oil & Gas Operator | Jun 2001 |
| 13153 | Hgi Corporation | Nada, TX 77460 | Oil & Gas Operator | Apr 2016 |
| 13154 | HGN Operating Co. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 13155 | HGN Operating I, LLC | Abilene, TX 79604 | Oil & Gas Operator | Jun 2025 |
| 13156 | HH&F Partners | Katy, TX 77450 | Oil & Gas Operator | Sep 2019 |
| 13157 | HHH & G Oil Co | Owasso, OK 74055 | Oil Operator | Jun 2020 |
| 13158 | HHL Development Inc | Garber, OK 73738 | Oil & Gas Operator | Jan 2025 |
| 13159 | Hi - Mountain Energy Corporation | Odessa, TX 79762 | Oil & Gas Operator | Jun 2025 |
| 13160 | Hi Plains Hydrocarbons, Inc. | Sunray, TX 79086 | Oil & Gas Operator | Oct 2002 |
| 13161 | Hi Snyder/Snyder Oil & Gas Inc | Dover, OH 44622 | Oil & Gas Operator | Dec 2019 |
| 13162 | Hi-Kat Petroleum | | Oil Operator | Mar 1990 |
| 13163 | Hi-Kat Petroleum Company | Liberal, KS 67905-1261 | Oil & Gas Operator | May 2014 |
| 13164 | Hi-Mi Exploration, LLC | Alvaton, KY 42122 | Oil & Gas Operator | Dec 2022 |
| 13165 | Hi-Pro Production | Gillette, WY 82717 | Gas Operator | Nov 2003 |
| 13166 | Hiawatha Exploration Company | Oklahoma City, OK 73116-7326 | Oil & Gas Operator | Mar 2009 |
| 13167 | Hibbard Energy, LP | Whitehouse, TX 75791 | Oil & Gas Operator | Jun 2025 |
| 13168 | Hibbard-Frost-Smith | | Oil & Gas Operator | Apr 1990 |
| 13169 | Hibbert R E Estate Of | Houston, TX 77002-3211 | Oil & Gas Operator | Apr 2015 |
| 13170 | Hibernia Resources III, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2023 |
| 13171 | Hibernia Resources IV, LLC | Houston, TX 77056 | Oil & Gas Operator | Jun 2025 |
| 13172 | Hibernia Resources, LLC | Houston, TX 77027 | Oil & Gas Operator | Jun 2014 |
| 13173 | Hibernian Compan | | Oil & Gas Operator | Feb 1991 |
| 13174 | Hickey, Jeff | Whitesville, KY 42378 | Oil Operator | Dec 2023 |
| 13175 | Hickey, Kevin F. & Mary | Akron, NY 14001 | Gas Operator | Dec 2023 |
| 13176 | Hickman & Ickert | Olney, TX 76374 | Oil & Gas Operator | Feb 2002 |
| 13177 | Hickman, Chad | Burkesville, KY 42717 | Oil Operator | Dec 2023 |
| 13178 | Hickman, Johnny | | Oil & Gas Operator | Oct 2011 |
| 13179 | Hickman-Jordan-Halligan Ranches | Blackwell, TX 79506 | Oil & Gas Operator | Feb 1998 |
| 13180 | Hickory Petroleum Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jun 2013 |
| 13181 | Hickory-National Co. | | Oil Operator | Dec 1986 |
| 13182 | Hickox Oil Texas Company, Inc. | Mobile, AL 36689 | Oil & Gas Operator | Feb 1996 |
| 13183 | Hickox, I. N. | | Oil Operator | Nov 1967 |
| 13184 | Hicks Exploration, LLC | Dover, OK 73734 | Gas Operator | Feb 2025 |
| 13185 | Hicks Oil & Gas Inc | Farmington, NM 87499 | Oil & Gas Operator | Oct 2012 |
| 13186 | Hicks Production Co. | | Oil & Gas Operator | Apr 1991 |
| 13187 | Hicon Gas Producers, Inc. | New York, NY 10110 | Oil & Gas Operator | Oct 1999 |
| 13188 | Hidalgo Oil & Exploration Corp. | New Braunfels, TX 78131 | Oil & Gas Operator | Jun 2025 |
| 13189 | Hiebert & Wedel | | Oil & Gas Operator | May 1995 |
| 13190 | Hiebert, D. O. Lewis | McPherson, KS 67460 | Oil Operator | Feb 1999 |
| 13191 | Higginbotham, O. V. | Cedar Park, TX 78613 | Oil & Gas Operator | Jul 1996 |
| 13192 | Higginbottom Engineering, Inc. | Liberal, KS 67905 | Oil & Gas Operator | Feb 2025 |
| 13193 | Higgins Oil & Ga | | Oil Operator | Apr 1992 |
| 13194 | High Bluff Operating, LLC | Littleton, CO 80161 | Oil & Gas Operator | May 2018 |
| 13195 | High Chapparal Oil Company | Plntersville, TX 77363 | Oil & Gas Operator | Aug 2003 |
| 13196 | High Desert Resources, L.L.C. | Midland, TX 79704 | Oil Operator | Jun 2025 |
| 13197 | High Energy | Cushing, OK 74023 | Oil & Gas Operator | Mar 2025 |
| 13198 | High Island Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 13199 | High Island Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2017 |
| 13200 | High McDonald Operating Co | Norman, OK 73072-7607 | Oil Operator | Mar 2025 |