| 12101 | Halex Oil Corporation | Houston, TX 77057 | Oil & Gas Operator | May 2024 |
| 12102 | Haley/Hughes Operations | | Oil Operator | Apr 2001 |
| 12103 | Halfway Oil Inc | Tahlequah, OK 74464-5448 | Oil & Gas Operator | Aug 2013 |
| 12104 | Halgas Inc | Tulsa, OK 74101-3012 | Oil & Gas Operator | May 2013 |
| 12105 | Hall & Horning Serv Inc | Atwater, OH 44201-9375-9375 | Oil & Gas Operator | Dec 2009 |
| 12106 | Hall And Kelley Oil & Gas | | Oil Operator | Dec 1995 |
| 12107 | Hall Drilling LLC (Oil & Gas) | Ellenboro, WV 26346 | Gas Operator | Sep 2014 |
| 12108 | Hall Drilling, LLC | Ellenboro, WV 26346 | Oil & Gas Operator | Dec 2021 |
| 12109 | Hall Edward L | Ada, OK 74820-3321 | Oil & Gas Operator | Feb 2024 |
| 12110 | Hall Energy Co. | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2016 |
| 12111 | Hall Energy Company LLC | Oklahoma City, OK 73120-5020 | Oil & Gas Operator | Jul 2022 |
| 12112 | Hall Energy Inc | Magnetic Spring, OH 43036-218-218 | Oil & Gas Operator | Dec 2017 |
| 12113 | Hall Engineering, Inc. | | Oil & Gas Operator | Jan 2007 |
| 12114 | Hall Exploration, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2024 |
| 12115 | Hall Farm Leasing, LLC | | Oil Operator | Dec 2012 |
| 12116 | Hall IVan & Assoc Inc | Berea, OH 44017 | Oil & Gas Operator | Dec 1997 |
| 12117 | Hall Oil & Gas | Coahoma, TX 79511 | Oil & Gas Operator | May 2024 |
| 12118 | Hall Oil Company | Humboldt, KS 66748 | Oil Operator | Nov 2009 |
| 12119 | Hall Phoenix Energy, LLC | Frisco, TX 75034 | Oil & Gas Operator | Jun 2022 |
| 12120 | Hall Resources Corporation | Independence, MO 64057-2158 | Oil & Gas Operator | Jun 2016 |
| 12121 | Hall Richard A | | Oil Operator | Sep 1993 |
| 12122 | Hall Thomas E | Marietta, OH 45750 | Oil & Gas Operator | Dec 2021 |
| 12123 | Hall'S Well DRLG & Pump Service, Inc | Avon Park, FL 33825 | Oil Operator | Dec 2022 |
| 12124 | Hall, Charles C | | Oil Operator | Sep 2017 |
| 12125 | Hall, D. Corporation | La Grange, TX 78945 | Oil & Gas Operator | Mar 2013 |
| 12126 | Hall, E. G., Oil Co. | Mexia, TX 76667 | Oil & Gas Operator | May 2024 |
| 12127 | Hall, J.J. Operating Co., Inc. | Lakewood, CO 80215 | Oil Operator | Jan 2005 |
| 12128 | Hall, James H ( Trust) | | Gas Operator | Dec 2007 |
| 12129 | Hall, Michael Wayne | Toronto, KS 66777 | Oil Operator | Dec 2009 |
| 12130 | Hall-Hargraves, LLC | Oil City, LA 71061 | Oil & Gas Operator | Dec 2023 |
| 12131 | Hall-Houston Expl. II, L.P. | Houston, TX 77027 | Oil & Gas Operator | May 2024 |
| 12132 | Hall-Houston Expl. III, L.P. | Houston, TX 77027 | Oil & Gas Operator | Jul 2013 |
| 12133 | Hall-Houston Oil Company | Houston, TX 77002 | Oil & Gas Operator | Oct 2002 |
| 12134 | Hallador Petroleum Company | | Oil & Gas Operator | Feb 1992 |
| 12135 | Hallador Petroleum LLP | Denver, CO 80264 | Oil & Gas Operator | Feb 2019 |
| 12136 | Hallar Enterprises, Inc. | | Oil Operator | Sep 2007 |
| 12137 | Hallco Petroleum Inc | Oklahoma City, OK 73106-5224 | Oil Operator | Aug 2018 |
| 12138 | Halliburton Oil | | Oil & Gas Operator | Sep 2008 |
| 12139 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 12140 | Halliburton Operating Company | Plano, TX 75093 | Oil & Gas Operator | May 2024 |
| 12141 | Hallmark Oil And Gas Co., Inc. | | Oil & Gas Operator | Dec 2023 |
| 12142 | Hallmark Resources, Inc | Stilwell, OK 74960-0312 | Oil & Gas Operator | Sep 2020 |
| 12143 | Hallum Construction Inc | Seminole, OK 74868-2427 | Oil & Gas Operator | Sep 2014 |
| 12144 | Hallwell Gas & Oil Co. | | Oil & Gas Operator | Sep 1985 |
| 12145 | Hallwood Energy Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2005 |
| 12146 | Hallwood Petrole | | Oil & Gas Operator | Apr 1999 |
| 12147 | Hallwood Petroleum | Denver, CO 80237 | Oil & Gas Operator | Dec 1997 |
| 12148 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2023 |
| 12149 | Hallwood Petroleum, LLC | Dallas, TX 75219 | Oil & Gas Operator | Jan 2010 |
| 12150 | Halo Energy L.L.C. | Kilgore, TX 75662 | Oil Operator | May 2024 |
| 12151 | Halter Ralph P | Robertsville, OH 44670 | Oil Operator | Dec 1999 |
| 12152 | Halvey Energy Co. | Midland, TX 79702 | Oil & Gas Operator | Oct 2004 |
| 12153 | Halvey Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | May 2024 |
| 12154 | Ham Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Feb 2000 |
| 12155 | Ham Oil Company, LLC | | Oil Operator | Sep 2022 |
| 12156 | Hamblin Ralph Inc | MT Vernon, OH 43050 | Oil & Gas Operator | Dec 1991 |
| 12157 | Hamby Oil LLC | Ellinwood, KS 67526 | Oil Operator | May 2013 |
| 12158 | Hamil Oil & Gas LLC | | Oil & Gas Operator | Feb 2024 |
| 12159 | Hamill Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1999 |
| 12160 | Hamill, Claud B. Estate Of | Houston, TX 77002 | Oil & Gas Operator | Nov 1995 |
| 12161 | Hamill, Flora Oil Co. | Levelland, TX 79336 | Oil & Gas Operator | May 2024 |
| 12162 | Hamilton B J | Ada, OK 74820-9404 | Oil & Gas Operator | Sep 1999 |
| 12163 | Hamilton Brother | | Gas Operator | May 1993 |
| 12164 | Hamilton Brothers | Plainview, TX 79073 | Oil & Gas Operator | Mar 2008 |
| 12165 | Hamilton Brothers Oil Co. | Houston, TX 77057 | Oil & Gas Operator | Mar 2015 |
| 12166 | Hamilton K M Oil & Gas Co | Ada, OK 74820 | Oil Operator | Jan 2013 |
| 12167 | Hamilton Leonard O | Marietta, OH 45750 | Oil & Gas Operator | Dec 2022 |
| 12168 | Hamilton, Clay | Carrizo SPGS, TX 78834 | Oil & Gas Operator | May 2024 |
| 12169 | Hamilton, J. R. | Carrizo SPGS, TX 78834 | Oil & Gas Operator | May 2024 |
| 12170 | Hamilton, John M. | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2001 |
| 12171 | Hamilton, W. B., Estate | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2004 |
| 12172 | Hamilton-Tedford Oper. Co., LLC | Wichita Falls, TX 76301 | Oil Operator | May 2007 |
| 12173 | Hamlin Oil Opera | | Oil Operator | May 1988 |
| 12174 | Hamm N R Contrac | | Oil & Gas Operator | Jun 1989 |
| 12175 | Hamm, Richard | Monahans, TX 79756 | Oil & Gas Operator | Mar 1994 |
| 12176 | Hamm, Richard Inc. | Monahans, TX 79756 | Oil & Gas Operator | May 2024 |
| 12177 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | May 2024 |
| 12178 | Hamman, Blake | Graham, TX 76450 | Oil & Gas Operator | Jul 2020 |
| 12179 | Hammer Maclean Etal | Leon, KS 67074 | Oil Operator | Dec 2019 |
| 12180 | Hammer Oil Compa | | Oil Operator | Oct 1985 |
| 12181 | Hammer Oil Company | Post, TX 79356 | Oil & Gas Operator | Jun 2002 |
| 12182 | Hammer Oil Properties Inc | Enid, OK 73706-0144 | Oil & Gas Operator | Oct 2017 |
| 12183 | Hammer Ranch | Elmore City, OK 73433-0157 | Oil & Gas Operator | Jan 2023 |
| 12184 | Hammerschmidt Wi | | Oil Operator | Sep 1991 |
| 12185 | Hammerschmidt, Leo | Plainville, KS 67663 | Oil Operator | Aug 2000 |
| 12186 | Hammerschmidt, William E | Plainville, KS 67663 | Oil Operator | Dec 2023 |
| 12187 | Hammersmith, Beverly | West Falls, NY 14170 | Gas Operator | Dec 2022 |
| 12188 | Hammon Properties | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 1996 |
| 12189 | Hammond Valley Colony, Inc. | Harlowton, MT 59036 | Gas Operator | Mar 2024 |
| 12190 | Hamon Jake L | Dallas, TX 75201-3902 | Oil & Gas Operator | Nov 1997 |
| 12191 | Hamon Oil Company | | Oil & Gas Operator | Aug 1985 |
| 12192 | Hamon Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2011 |
| 12193 | Hamp Oil | Ponca City, OK 74604 | Oil & Gas Operator | Sep 2002 |
| 12194 | Hamp Oil - Pace | | Oil & Gas Operator | Apr 1994 |
| 12195 | Hampton Corporation (The) | Norman, OK 73069-5910 | Oil Operator | Jun 2016 |
| 12196 | Hampton Oil & Gas | Early, TX 76802 | Gas Operator | Feb 2012 |
| 12197 | Hampton Resources Corporation | Houston, TX 77010 | Oil & Gas Operator | Mar 1996 |
| 12198 | Hampton, Jno. W. & Son | Wichita Falls, TX 76302 | Oil & Gas Operator | Nov 1998 |
| 12199 | Hanaco Operating | Holliday, TX 76366 | Oil Operator | Mar 2008 |
| 12200 | Hanaco, LLC | Holliday, TX 76366 | Oil Operator | Dec 2017 |