| 13101 | HGN Operating I, LLC | Abilene, TX 79604 | Oil & Gas Operator | Jul 2025 |
| 13102 | HH&F Partners | Katy, TX 77450 | Oil & Gas Operator | Sep 2019 |
| 13103 | HHH & G Oil Co | Owasso, OK 74055 | Oil Operator | Jun 2020 |
| 13104 | HHL Development Inc | Garber, OK 73738 | Oil & Gas Operator | Apr 2025 |
| 13105 | Hi - Mountain Energy Corporation | Odessa, TX 79762 | Oil & Gas Operator | Jul 2025 |
| 13106 | Hi Plains Hydrocarbons, Inc. | Sunray, TX 79086 | Oil & Gas Operator | Oct 2002 |
| 13107 | Hi Snyder/Snyder Oil & Gas Inc | Dover, OH 44622 | Oil & Gas Operator | Dec 2019 |
| 13108 | Hi-Kat Petroleum | | Oil Operator | Mar 1990 |
| 13109 | Hi-Kat Petroleum Company | Liberal, KS 67905-1261 | Oil & Gas Operator | May 2014 |
| 13110 | Hi-Mi Exploration, LLC | Alvaton, KY 42122 | Oil & Gas Operator | Dec 2022 |
| 13111 | Hi-Pro Production | Gillette, WY 82717 | Gas Operator | Nov 2003 |
| 13112 | Hiawatha Exploration Company | Oklahoma City, OK 73116-7326 | Oil & Gas Operator | Mar 2009 |
| 13113 | Hibbard Energy, LP | Whitehouse, TX 75791 | Oil & Gas Operator | Jul 2025 |
| 13114 | Hibbard-Frost-Smith | | Oil & Gas Operator | Apr 1990 |
| 13115 | Hibbert R E Estate Of | Houston, TX 77002-3211 | Oil & Gas Operator | Apr 2015 |
| 13116 | Hibernia Resources III, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2023 |
| 13117 | Hibernia Resources IV, LLC | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 13118 | Hibernia Resources, LLC | Houston, TX 77027 | Oil & Gas Operator | Jun 2014 |
| 13119 | Hibernian Compan | | Oil & Gas Operator | Feb 1991 |
| 13120 | Hickey, Jeff | Whitesville, KY 42378 | Oil Operator | Dec 2023 |
| 13121 | Hickey, Kevin F. & Mary | Akron, NY 14001 | Gas Operator | Dec 2024 |
| 13122 | Hickman & Ickert | Olney, TX 76374 | Oil & Gas Operator | Feb 2002 |
| 13123 | Hickman, Chad | Burkesville, KY 42717 | Oil Operator | Dec 2023 |
| 13124 | Hickman, Johnny | | Oil & Gas Operator | Oct 2011 |
| 13125 | Hickman-Jordan-Halligan Ranches | Blackwell, TX 79506 | Oil & Gas Operator | Feb 1998 |
| 13126 | Hickory Petroleum Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jun 2013 |
| 13127 | Hickory-National Co. | | Oil Operator | Dec 1986 |
| 13128 | Hickox Oil Texas Company, Inc. | Mobile, AL 36689 | Oil & Gas Operator | Feb 1996 |
| 13129 | Hickox, I. N. | | Oil Operator | Nov 1967 |
| 13130 | Hicks Exploration, LLC | Dover, OK 73734 | Gas Operator | Feb 2025 |
| 13131 | Hicks Oil & Gas Inc | Farmington, NM 87499 | Oil & Gas Operator | Oct 2012 |
| 13132 | Hicks Production Co. | | Oil & Gas Operator | Apr 1991 |
| 13133 | Hicon Gas Producers, Inc. | New York, NY 10110 | Oil & Gas Operator | Oct 1999 |
| 13134 | Hidalgo Oil & Exploration Corp. | New Braunfels, TX 78131 | Oil & Gas Operator | Jul 2025 |
| 13135 | Hiebert & Wedel | | Oil & Gas Operator | May 1995 |
| 13136 | Hiebert, D. O. Lewis | McPherson, KS 67460 | Oil Operator | Feb 1999 |
| 13137 | Higginbotham, O. V. | Cedar Park, TX 78613 | Oil & Gas Operator | Jul 1996 |
| 13138 | Higginbottom Engineering, Inc. | Liberal, KS 67905 | Oil & Gas Operator | Mar 2025 |
| 13139 | Higgins Oil & Ga | | Oil Operator | Apr 1992 |
| 13140 | High Bluff Operating, LLC | Littleton, CO 80161 | Oil & Gas Operator | May 2018 |
| 13141 | High Chapparal Oil Company | Plntersville, TX 77363 | Oil & Gas Operator | Aug 2003 |
| 13142 | High Desert Resources, L.L.C. | Midland, TX 79704 | Oil Operator | Jul 2025 |
| 13143 | High Energy | Cushing, OK 74023 | Oil & Gas Operator | Apr 2025 |
| 13144 | High Island Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 13145 | High Island Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2017 |
| 13146 | High McDonald Operating Co | Norman, OK 73072-7607 | Oil Operator | Mar 2025 |
| 13147 | High Mountain Oil & Gas | Hobbs, NM 88240 | Oil & Gas Operator | Jan 2019 |
| 13148 | High Mountain Oil & Gas, LLC | Hobbs, NM 88240 | Oil & Gas Operator | Jul 2025 |
| 13149 | High Noon Resources, LLC | Allen, TX 75013 | Oil & Gas Operator | Jul 2025 |
| 13150 | High Plains Energy LLC | | Oil & Gas Operator | May 2017 |
| 13151 | High Plains Gas LLC | Gillette, WY 82717 | Gas Operator | Aug 2014 |
| 13152 | High Plains Gas Systems, Inc. | Houston, TX 77019 | Oil & Gas Operator | Jul 2025 |
| 13153 | High Plains Oil | | Oil Operator | Jun 1989 |
| 13154 | High Plains Operating Co | | Oil & Gas Operator | Nov 1993 |
| 13155 | High Plains Operating, LLC | | Oil Operator | Jun 2025 |
| 13156 | High Plains Petroleum Corp | Boulder, CO 80305 | Oil & Gas Operator | Jan 2021 |
| 13157 | High Plains Production, LLC | Murray, KY 42071 | Oil & Gas Operator | Dec 2024 |
| 13158 | High Point Produ | | Gas Operator | May 1996 |
| 13159 | High River Res Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Jul 2025 |
| 13160 | High River Resources Operating LLC | Farmington, NM 87401 | Oil & Gas Operator | May 2025 |
| 13161 | High Sierra Operating, LTD. | Canyon Lake, TX 78133 | Oil & Gas Operator | Mar 2008 |
| 13162 | High Sierra Water Services Mid Continent LLC | Denver, CO 80209 | Oil Operator | Feb 2010 |
| 13163 | High Sky Oil & Gas | Midland, TX 79705 | Oil & Gas Operator | Jun 2008 |
| 13164 | High Sky Partners LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2015 |
| 13165 | High Splint Gas & Oil, Inc | Greenville, KY 42345 | Oil Operator | Dec 2023 |
| 13166 | High Summit Oil & Gas Inc | | Oil & Gas Operator | Sep 1987 |
| 13167 | High-Hope Oil And Gas, Inc | | Oil & Gas Operator | Mar 2017 |
| 13168 | High-Line Production Services LLC | | Oil & Gas Operator | Nov 2024 |
| 13169 | Higher Standard Oil Company,Inc. | Frisco, TX 75034 | Oil Operator | Jul 2025 |
| 13170 | Highfill Bob W | Claremore, OK 74018-2595 | Oil Operator | Jun 2005 |
| 13171 | Highground, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Jul 2025 |
| 13172 | Highhouse James R | Warren, PA 16365-7550 | Oil & Gas Operator | Dec 2008 |
| 13173 | Highland Exploration | | Oil Operator | Sep 1979 |
| 13174 | Highland Minerals, Inc. | Tulsa, OK 74145-7627 | Oil & Gas Operator | Apr 2015 |
| 13175 | Highland Oil & Gas Co | Mason, OH 45040 | Oil Operator | Dec 2022 |
| 13176 | Highland Oil & Gas LLC | Houston, TX 77079-7220 | Oil & Gas Operator | Feb 2015 |
| 13177 | Highland Oil Co. | | Oil Operator | Mar 1953 |
| 13178 | Highland Production Company | Midland, TX 79701 | Oil & Gas Operator | Mar 1996 |
| 13179 | Highland Resources, Inc. | | Oil & Gas Operator | Dec 2004 |
| 13180 | Highlander Oil & Gas Assets LLC | | Gas Operator | Jan 2025 |
| 13181 | Highlands Operating Co., Inc. | | Oil & Gas Operator | May 1990 |
| 13182 | Highline Exploration, Inc. | Tuscaloosa, AL 35402 | Gas Operator | Nov 2020 |
| 13183 | Highman Oil & Gas LLC | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2024 |
| 13184 | Highmark Energy Operating, LLC | Dallas, TX 75222 | Oil & Gas Operator | Jul 2025 |
| 13185 | Highmount Black Warrior Basin, LLC | | Gas Operator | Jul 2010 |
| 13186 | Highmount Expl & Prod Texas LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2014 |
| 13187 | Highmount Midwest Energy LLC | | Oil & Gas Operator | Sep 2011 |
| 13188 | Highmount Operating LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2014 |
| 13189 | Highpeak Energy Holdings, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 13190 | Highpoint Energy LLC | | Oil & Gas Operator | Nov 2022 |
| 13191 | Highpointe Oil & Gas LLC | Indiana, PA 15701-8944 | Gas Operator | Dec 2024 |
| 13192 | Hightower Energy LLC | Cushing, OK 74023-6370 | Oil & Gas Operator | May 2025 |
| 13193 | Hightower Exploration | Kilgore, TX 75662 | Oil & Gas Operator | Jul 2025 |
| 13194 | Hightower Oil & Gas | Cairo, IL 62914-0401 | Oil Operator | Nov 2014 |
| 13195 | Highway 15 SWD LLC | Shattuck, OK 73858 | Oil Operator | Oct 2021 |
| 13196 | Highway 60 SWD LLC | Shattuck, OK 73858-0848 | Oil Operator | Jul 2019 |
| 13197 | Hikcott Oil | Wilson, OK 73463-6537 | Oil Operator | Jan 2014 |
| 13198 | Hiko Bell Mining & Oil Co | Vernal, UT 84078 | Oil & Gas Operator | Oct 2003 |
| 13199 | Hilbers Oil & Gas | Archer City, TX 76351 | Oil & Gas Operator | Oct 2002 |
| 13200 | Hilburn Ind., Inc. | | Oil Operator | Jan 1978 |