| 13101 | Hickox Oil Texas Company, Inc. | Mobile, AL 36689 | Oil & Gas Operator | Feb 1996 |
| 13102 | Hickox, I. N. | | Oil Operator | Nov 1967 |
| 13103 | Hicks Exploration, LLC | Dover, OK 73734 | Gas Operator | Feb 2025 |
| 13104 | Hicks Oil & Gas Inc | Farmington, NM 87499 | Oil & Gas Operator | Oct 2012 |
| 13105 | Hicks Production Co. | | Oil & Gas Operator | Apr 1991 |
| 13106 | Hicon Gas Producers, Inc. | New York, NY 10110 | Oil & Gas Operator | Oct 1999 |
| 13107 | Hidalgo Oil & Exploration Corp. | New Braunfels, TX 78131 | Oil & Gas Operator | Nov 2025 |
| 13108 | Hidden Oaks Oil Company, LLC | New Braunfels, TX 78132 | Oil Operator | Nov 2025 |
| 13109 | Hiebert & Wedel | | Oil & Gas Operator | May 1995 |
| 13110 | Hiebert, D. O. Lewis | McPherson, KS 67460 | Oil Operator | Feb 1999 |
| 13111 | Higginbotham, O. V. | Cedar Park, TX 78613 | Oil & Gas Operator | Jul 1996 |
| 13112 | Higginbottom Engineering, Inc. | Liberal, KS 67905 | Oil & Gas Operator | Jun 2025 |
| 13113 | Higgins Oil & Ga | | Oil Operator | Apr 1992 |
| 13114 | High Bluff Operating, LLC | Littleton, CO 80161 | Oil & Gas Operator | May 2018 |
| 13115 | High Chapparal Oil Company | Plntersville, TX 77363 | Oil & Gas Operator | Aug 2003 |
| 13116 | High Desert Resources, L.L.C. | Midland, TX 79704 | Oil Operator | Nov 2025 |
| 13117 | High Energy | Cushing, OK 74023 | Oil & Gas Operator | Jul 2025 |
| 13118 | High Island Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2025 |
| 13119 | High Island Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2017 |
| 13120 | High McDonald Operating Co | Norman, OK 73072-7607 | Oil Operator | Jul 2025 |
| 13121 | High Mountain Oil & Gas | Hobbs, NM 88240 | Oil & Gas Operator | Jan 2019 |
| 13122 | High Mountain Oil & Gas, LLC | Hobbs, NM 88240 | Oil & Gas Operator | Nov 2025 |
| 13123 | High Noon Resources, LLC | Allen, TX 75013 | Oil & Gas Operator | Nov 2025 |
| 13124 | High Plains Energy LLC | | Oil & Gas Operator | May 2017 |
| 13125 | High Plains Gas LLC | Gillette, WY 82717 | Gas Operator | Aug 2014 |
| 13126 | High Plains Gas Systems, Inc. | Houston, TX 77019 | Oil & Gas Operator | Nov 2025 |
| 13127 | High Plains Oil | | Oil Operator | Jun 1989 |
| 13128 | High Plains Operating Co | | Oil & Gas Operator | Nov 1993 |
| 13129 | High Plains Operating, LLC | | Oil Operator | Sep 2025 |
| 13130 | High Plains Petroleum Corp | Boulder, CO 80305 | Oil & Gas Operator | Jan 2021 |
| 13131 | High Plains Production, LLC | Murray, KY 42071 | Oil & Gas Operator | Dec 2024 |
| 13132 | High Point Produ | | Gas Operator | May 1996 |
| 13133 | High River Res Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Nov 2025 |
| 13134 | High River Resources Operating, LLC | Farmington, NM 87401 | Oil & Gas Operator | Aug 2025 |
| 13135 | High Sierra Operating, LTD. | Canyon Lake, TX 78133 | Oil & Gas Operator | Mar 2008 |
| 13136 | High Sierra Water Services Mid Continent LLC | Denver, CO 80209 | Oil Operator | Feb 2010 |
| 13137 | High Sky Oil & Gas | Midland, TX 79705 | Oil & Gas Operator | Jun 2008 |
| 13138 | High Sky Partners LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2015 |
| 13139 | High Splint Gas & Oil, Inc | Greenville, KY 42345 | Oil Operator | Dec 2023 |
| 13140 | High Summit Oil & Gas Inc | | Oil & Gas Operator | Sep 1987 |
| 13141 | High-Hope Oil And Gas, Inc | | Oil & Gas Operator | Mar 2017 |
| 13142 | High-Line Production Services LLC | | Oil & Gas Operator | Aug 2025 |
| 13143 | Higher Standard Oil Company,Inc. | Frisco, TX 75034 | Oil Operator | Nov 2025 |
| 13144 | Highfill Bob W | Claremore, OK 74018-2595 | Oil Operator | Jun 2005 |
| 13145 | Highground, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Nov 2025 |
| 13146 | Highhouse James R | Warren, PA 16365-7550 | Oil & Gas Operator | Dec 2008 |
| 13147 | Highland Exploration | | Oil Operator | Sep 1979 |
| 13148 | Highland Minerals Inc | Tulsa, OK 74145-7627 | Oil & Gas Operator | Apr 2015 |
| 13149 | Highland Oil & Gas Co | Mason, OH 45040 | Oil Operator | Dec 2022 |
| 13150 | Highland Oil & Gas LLC | Houston, TX 77079-7220 | Oil & Gas Operator | Feb 2015 |
| 13151 | Highland Oil Co. | | Oil Operator | Mar 1953 |
| 13152 | Highland Production Company | Midland, TX 79701 | Oil & Gas Operator | Mar 1996 |
| 13153 | Highland Resources, Inc. | | Oil & Gas Operator | Dec 2004 |
| 13154 | Highlander Oil & Gas Assets LLC | | Gas Operator | Jan 2025 |
| 13155 | Highlands Operating Co., Inc. | | Oil & Gas Operator | May 1990 |
| 13156 | Highline Exploration, Inc. | Tuscaloosa, AL 35402 | Gas Operator | Nov 2020 |
| 13157 | Highman Oil & Gas LLC | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2024 |
| 13158 | Highmark Energy Operating LLC | Dallas, TX 75222 | Oil & Gas Operator | Nov 2025 |
| 13159 | Highmount Black Warrior Basin, LLC | | Gas Operator | Jul 2010 |
| 13160 | Highmount Expl & Prod Texas LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2014 |
| 13161 | Highmount Midwest Energy LLC | | Oil & Gas Operator | Sep 2011 |
| 13162 | Highmount Operating LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2014 |
| 13163 | Highpeak Energy Holdings, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2025 |
| 13164 | Highpoint Energy LLC | | Oil & Gas Operator | Nov 2022 |
| 13165 | Highpointe Oil & Gas LLC | Indiana, PA 15701-8944 | Gas Operator | Dec 2024 |
| 13166 | Hightower Energy LLC | Cushing, OK 74023-6370 | Oil & Gas Operator | Aug 2025 |
| 13167 | Hightower Exploration | Kilgore, TX 75662 | Oil & Gas Operator | Nov 2025 |
| 13168 | Hightower Oil & Gas | Cairo, IL 62914-0401 | Oil Operator | Nov 2014 |
| 13169 | Highway 15 SWD LLC | Shattuck, OK 73858 | Oil Operator | Oct 2021 |
| 13170 | Highway 60 SWD LLC | Shattuck, OK 73858-0848 | Oil Operator | Jul 2019 |
| 13171 | Hikcott Oil | Wilson, OK 73463-6537 | Oil Operator | Jan 2014 |
| 13172 | Hiko Bell Mining & Oil Co | Vernal, UT 84078 | Oil & Gas Operator | Oct 2003 |
| 13173 | Hilbers Oil & Gas | Archer City, TX 76351 | Oil & Gas Operator | Oct 2002 |
| 13174 | Hilburn Ind., Inc. | | Oil Operator | Jan 1978 |
| 13175 | Hilcorp Alaska, LLC | | Oil & Gas Operator | Sep 2025 |
| 13176 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Nov 2025 |
| 13177 | Hilcorp North Slope, LLC | | Oil & Gas Operator | Sep 2025 |
| 13178 | Hilden Oil Co Inc | | Oil & Gas Operator | Oct 2024 |
| 13179 | Hildreth, Roy G & Son Inc | Spencer, WV 25276 | Oil & Gas Operator | Dec 2021 |
| 13180 | Hildreth, Va Roy | | Oil & Gas Operator | Dec 1996 |
| 13181 | Hildreth, William H & David Dale | | Oil & Gas Operator | Dec 2021 |
| 13182 | Hill Drilling Inc | Millersburg, OH 44654 | Oil & Gas Operator | Dec 1997 |
| 13183 | Hill Gilford | Stroud, OK 74079-9401 | Oil & Gas Operator | May 2013 |
| 13184 | Hill John H | Dallas, TX 75240-7077 | Oil & Gas Operator | Jul 2015 |
| 13185 | Hill Oil And Gas Co., Inc. | Overland Park, KS 66213 | Oil Operator | Mar 2020 |
| 13186 | Hill Oil Company Inc | Shawnee, OK 74804 | Oil & Gas Operator | Jul 2025 |
| 13187 | Hill Operating LLC | Mineral Wells, TX 76068 | Oil & Gas Operator | Nov 2023 |
| 13188 | Hill Production | | Oil & Gas Operator | Nov 1981 |
| 13189 | Hill Production Co Inc-Wisconsin | Humble, TX 77347 | Oil & Gas Operator | Jun 1993 |
| 13190 | Hill Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2009 |
| 13191 | Hill Production Company No. 2 | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2025 |
| 13192 | Hill Resources Inc | | Oil & Gas Operator | Nov 2022 |
| 13193 | Hill Robert H & Willa F | Morris, OK 74445 | Oil & Gas Operator | Apr 2020 |
| 13194 | Hill William F | Millersburg, OH 44654 | Oil & Gas Operator | Dec 1993 |
| 13195 | Hill William H | Broken Arrow, OK 74012-8952 | Oil & Gas Operator | Apr 2020 |
| 13196 | Hill, A G | Dallas, TX 75201 | Oil & Gas Operator | May 2008 |
| 13197 | Hill, Albert, Trust | Dallas, TX 75201 | Oil & Gas Operator | May 2008 |
| 13198 | Hill, Bill | Kilgore, TX 75663 | Oil Operator | Mar 2014 |
| 13199 | Hill, Charles Drilling, Inc. | Grand Prairie, TX 75052 | Oil & Gas Operator | Nov 2025 |
| 13200 | Hill, Gillman A | Englewood, CO 80112 | Oil & Gas Operator | Jun 1993 |