| 12101 | Gugli Corporation | Byng, OK 74820 | Oil & Gas Operator | Sep 2014 |
| 12102 | Guidance Oil Developers | Boerne, TX 78006 | Oil & Gas Operator | Jun 2025 |
| 12103 | Guidance Oil Developers, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Mar 2008 |
| 12104 | Guidance Oil Developers,Inc.(1) | Boerne, TX 78006 | Oil Operator | Jun 2025 |
| 12105 | Guido & Arnold | | Oil & Gas Operator | Feb 1982 |
| 12106 | Guido Energy Co & Guernsey Pet | | Oil Operator | Aug 1991 |
| 12107 | Guido Production Co Inc | | Oil Operator | May 1995 |
| 12108 | Guidon Energy MGMT Services LLC | Irving, TX 75062 | Oil & Gas Operator | Dec 2020 |
| 12109 | Guin, Don L. | Flint, TX 75762 | Oil & Gas Operator | Apr 2018 |
| 12110 | Guinn David E | Cleveland, OK 74020 | Oil & Gas Operator | Feb 2025 |
| 12111 | Guinn Investments, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2018 |
| 12112 | Guinn Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Sep 2024 |
| 12113 | Guinn Operating Company | Spring Branch, TX 78070 | Oil & Gas Operator | Feb 2014 |
| 12114 | Guinn Operating Company, LLC | San Antonio, TX 78260 | Oil Operator | Jun 2025 |
| 12115 | Guinotte Company LLC | Ottawa, KS 66067 | Oil Operator | Dec 2009 |
| 12116 | Gulf Bend Resources, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2016 |
| 12117 | Gulf Central Petroleum Corp. | Dallas, TX 75252 | Oil & Gas Operator | Jun 2025 |
| 12118 | Gulf Coast Crude O&G Co., Inc. | | Oil & Gas Operator | May 1982 |
| 12119 | Gulf Coast Energy, Co. | Alvin, TX 77511 | Oil & Gas Operator | Apr 2021 |
| 12120 | Gulf Coast Mineral, LLC | Foley, AL 36535 | Oil & Gas Operator | Jul 2021 |
| 12121 | Gulf Coast Operations, LLC | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Jun 2025 |
| 12122 | Gulf Energy Corporation | Denver, CO 80237 | Oil & Gas Operator | Jun 1987 |
| 12123 | Gulf Energy Exploration Corp. | Austin, TX 78716 | Gas Operator | Jun 2025 |
| 12124 | Gulf Exploration Company, Inc. | | Oil & Gas Operator | Dec 2024 |
| 12125 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2025 |
| 12126 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
| 12127 | Gulf Outlet Resources, L.L.C. | | Oil & Gas Operator | Apr 2008 |
| 12128 | Gulf Pine Energy, LP | | Oil & Gas Operator | Mar 2025 |
| 12129 | Gulf Production Company, Inc. | | Oil & Gas Operator | Dec 2024 |
| 12130 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 12131 | Gulf Refining Co. | | Oil Operator | Dec 2006 |
| 12132 | Gulf Shore Petro. Oper. Co., Inc | Woodland HLS, CA 91367 | Oil & Gas Operator | Apr 1998 |
| 12133 | Gulf South Minerals, Inc. | | Oil Operator | Nov 1993 |
| 12134 | Gulf South Oil & Gas, Inc. | | Oil & Gas Operator | Feb 1990 |
| 12135 | Gulf South Operators, Inc. | New Orleans, LA 70130 | Oil & Gas Operator | Oct 2015 |
| 12136 | Gulf South Pipeline Company, LLC | | Oil & Gas Operator | Jan 2025 |
| 12137 | Gulf South Pipeline Company, LP | Houston, TX 77046 | Oil & Gas Operator | Dec 2020 |
| 12138 | Gulf States Exploration Co. | | Oil & Gas Operator | Dec 1983 |
| 12139 | Gulf States Petro. Corp. | Dallas, TX 75202 | Oil & Gas Operator | Apr 2006 |
| 12140 | Gulf States Pipeline Corp. | | Oil & Gas Operator | May 2003 |
| 12141 | Gulf States Production Company | Houston, TX 77027 | Oil & Gas Operator | Aug 1997 |
| 12142 | Gulf Tech Energy LLC | | Oil & Gas Operator | Dec 2002 |
| 12143 | Gulf Tide Oil Company, The | Houston, TX 77008 | Oil & Gas Operator | Jun 1999 |
| 12144 | Gulfland Resources, Inc. | | Oil & Gas Operator | Aug 1996 |
| 12145 | Gulfport Appalachia LLC | Oklahoma City, OK 73114-2640 | Oil & Gas Operator | Mar 2025 |
| 12146 | Gulfport Energy Corporation | Oklahoma City, OK 73134-5003 | Oil & Gas Operator | Feb 2025 |
| 12147 | Gulfport Midcon LLC | Oklahoma City, OK 73114-8132 | Oil & Gas Operator | Apr 2025 |
| 12148 | Gulfport Oil & Gas Inc. | Gulfport, MS 39501 | Oil & Gas Operator | Jun 2025 |
| 12149 | Gulfstar Energy Group, LLC | Caneyville, KY 42721 | Oil & Gas Operator | Dec 2023 |
| 12150 | Gulfstar Properties, Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Jun 2025 |
| 12151 | Gulfstream Of Louisiana, Inc. | | Oil & Gas Operator | Jan 1996 |
| 12152 | Gulfstream Petroleum Corp. | | Oil & Gas Operator | Feb 2002 |
| 12153 | Gulfstream Resources, Inc. | | Oil & Gas Operator | May 1996 |
| 12154 | Gulftex Energy II, LP | San Antonio, TX 78258 | Oil & Gas Operator | Jan 2013 |
| 12155 | Gulftex Energy III, LP | San Antonio, TX 78257 | Oil & Gas Operator | Jul 2018 |
| 12156 | Gulftex Energy IV, LP | San Antonio, TX 78257 | Oil & Gas Operator | Jul 2019 |
| 12157 | Gulftex Energy, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Jun 2025 |
| 12158 | Gulftex Operating Inc | Plano, TX 75093 | Oil & Gas Operator | Jun 2025 |
| 12159 | Gulick Drilling , Inc. | Eureka, KS 67045 | Oil Operator | Feb 2025 |
| 12160 | Gumfory, Shawn | Iola, KS 66749 | Oil Operator | Jul 1998 |
| 12161 | Gungoll Carl E Estate | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Aug 2000 |
| 12162 | Gungoll Henry H. Associates | Enid, OK 73701 | Oil & Gas Operator | Jan 2024 |
| 12163 | Gungoll, Carl E. Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 12164 | Gunkel Charley Wayne Rev Inter VIvos Trust | Schulter, OK 74460-0010 | Gas Operator | Dec 2015 |
| 12165 | Gunn And Divers | Mount Zion, WV 26151 | Oil & Gas Operator | Dec 2021 |
| 12166 | Gunn Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2025 |
| 12167 | Gunn, P. P., Estate Heirs | | Oil & Gas Operator | Dec 2008 |
| 12168 | Gunner Energy Corp. | Troy, MI 48083 | Oil & Gas Operator | Jun 1995 |
| 12169 | Gunner Oil Company | Wichita, KS 67205 | Oil & Gas Operator | Feb 2025 |
| 12170 | Gunnison Energy Corporation | | Oil & Gas Operator | Jun 2014 |
| 12171 | Gunnison Energy LLC | | Oil & Gas Operator | Mar 2025 |
| 12172 | Gunsight Energy Inc | Floydada, TX 79235-2521 | Oil Operator | Jun 2009 |
| 12173 | Gunsight Supply Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2003 |
| 12174 | Gunsmoke Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | May 2012 |
| 12175 | Gunter Jim | Springer, OK 73458 | Oil Operator | Mar 2025 |
| 12176 | Gupton Gas Co. | Fort Worth, TX 76107 | Oil & Gas Operator | Aug 1994 |
| 12177 | Gurley Oil Co | Kirtland, NM 87417 | Oil Operator | Dec 1995 |
| 12178 | Gurnee Gas Co., L.L.C. | | Gas Operator | Jul 2001 |
| 12179 | Gus Jones Cable Tool Service, LLC | Elk City, KS 67344 | Oil Operator | Nov 2024 |
| 12180 | Gusher Oil | | Oil Operator | Jul 2004 |
| 12181 | Gustafson Brothers Inc. | | Oil & Gas Operator | Dec 2002 |
| 12182 | Gustafson Family Trust 2 | Frewsburg, NY 14738 | Gas Operator | Dec 2023 |
| 12183 | Gustafson, Alan | Falconer, NY 14733 | Gas Operator | Dec 2023 |
| 12184 | Gustison Steven | | Oil Operator | Feb 1985 |
| 12185 | Guthrie Clare L And June | | Oil Operator | Nov 2021 |
| 12186 | Guthrie Oil Co | | Oil Operator | Nov 1994 |
| 12187 | Guthrie Oil Comp | | Oil & Gas Operator | Dec 1994 |
| 12188 | Guthrie, A. K. Operating Co. | Big Spring, TX 79720 | Oil & Gas Operator | Mar 1996 |
| 12189 | Guyan Gas Producers, Inc. | Oceana, WV 24870 | Gas Operator | Dec 2018 |
| 12190 | Guynes And Backus | | Oil Operator | Nov 1999 |
| 12191 | Guys Oil & Gas LTD Co | Hobbs, NM 88241 | Oil & Gas Operator | Dec 2019 |
| 12192 | Guzman Energy Inc. | | Oil & Gas Operator | Apr 2025 |
| 12193 | GVC Ventures | Mineola, TX 75773 | Oil & Gas Operator | Apr 2025 |
| 12194 | GW Energy, Inc. | Midland, TX 79710 | Oil Operator | Jun 2025 |
| 12195 | GW Petroleum Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 1993 |
| 12196 | GWB Oil & Gas LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2024 |
| 12197 | Gwet, Inc. | Merkel, TX 79536 | Oil Operator | Jun 2025 |
| 12198 | Gwitt, Edward J. | Eden, NY 14057 | Gas Operator | Dec 2023 |
| 12199 | GWM Operating Company, LLC | Sugar Land, TX 77479 | Oil & Gas Operator | Jun 2025 |
| 12200 | Gyb-Britlind Oil, LLC | | Oil & Gas Operator | Jun 2016 |