| 1301 | Guthrie Oil Co | | Oil Operator | Nov 1994 |
| 1302 | Guthrie Oil Comp | | Oil & Gas Operator | Dec 1994 |
| 1303 | Guthrie, A. K. Operating Co. | Big Spring, TX 79720 | Oil & Gas Operator | Mar 1996 |
| 1304 | Guynes And Backus | | Oil Operator | Nov 1999 |
| 1305 | Guys Oil & Gas LTD Co | Hobbs, NM 88241 | Oil & Gas Operator | Dec 2019 |
| 1306 | Guzman Energy Inc. | | Oil & Gas Operator | Dec 2025 |
| 1307 | GVC Ventures | Mineola, TX 75773 | Oil & Gas Operator | Mar 2026 |
| 1308 | GW Energy, Inc. | Midland, TX 79710 | Oil Operator | Apr 2026 |
| 1309 | GW Investments, LLC | Mustang, OK 73064 | Oil Operator | Dec 2025 |
| 1310 | GW Petroleum Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 1993 |
| 1311 | GWB Oil & Gas LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2025 |
| 1312 | Gwet, Inc. | Merkel, TX 79536 | Oil Operator | Apr 2026 |
| 1313 | Gwitt, Edward J. | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 1314 | GWM Operating Company, LLC | Sugar Land, TX 77496 | Oil & Gas Operator | Apr 2026 |
| 1315 | Gyb-Britlind Oil, LLC | | Oil & Gas Operator | Jun 2016 |
| 1316 | Gypsy Exploration LLC | Oklahoma City, OK 73123-1323 | Oil & Gas Operator | Dec 2014 |
| 1317 | Gypsy Highview Gathering System, Inc. | Cut Bank, MT 59427-0250 | Oil & Gas Operator | Oct 2000 |
| 1318 | Gypsy Oil Co. | Austin, TX 78720 | Oil & Gas Operator | Jul 2017 |
| 1319 | Gypsyglenn Oil Company LLC | Tulsa, OK 74119-4809 | Oil & Gas Operator | Feb 2026 |
| 1320 | Gyro Petroleum | Amarillo, TX 79120 | Oil & Gas Operator | Apr 2026 |