| 1 | G & C Petroleum Inc | Yale, OK 74085-2502 | Oil & Gas Operator | Feb 2026 |
| 2 | Gary L. Deaton Corporation | Oklahoma City, OK 73105-3023 | Oil & Gas Operator | Mar 2015 |
| 3 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 4 | Genesis Inc | Seminole, OK 74818-1647 | Oil & Gas Operator | Sep 2014 |
| 5 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 6 | Geodyne Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 7 | Geoex Resources Inc | | Oil & Gas Operator | Jan 1997 |
| 8 | GMX Resources, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2014 |
| 9 | Goff D C Revocable Energy Trust | Fayetteville, AR 72702-1465 | Oil & Gas Operator | Jun 2005 |
| 10 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2026 |
| 11 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 12 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 13 | Graham-Michaelis Corporation | Wichita, KS 67201 | Oil & Gas Operator | Dec 2010 |
| 14 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2026 |
| 15 | Grasen Energy, Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2013 |
| 16 | Greenhead Energy Operating LLC | Oklahoma City, OK 73131 | Oil & Gas Operator | Feb 2026 |
| 17 | Gribble Oil Corporation | Dallas, TX 75235 | Oil Operator | Aug 1994 |
| 18 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2026 |
| 19 | Grizzly Energy Resources, L.L.C. | Midland, TX 79705 | Oil & Gas Operator | Jan 2026 |
| 20 | Grizzly Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Jan 2026 |
| 21 | Gross Jack L Production | Borger, TX 79008-0065 | Gas Operator | Mar 2015 |
| 22 | Gruenerwald WM & Assoc Inc | Colorado Spring, CO 80960-0669 | Oil & Gas Operator | Jan 2002 |
| 23 | Grynberg Petroleum Company | Greenwood Vge, CO 80111-3326 | Oil & Gas Operator | Oct 2019 |
| 24 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 25 | Gypsyglenn Oil Company LLC | Tulsa, OK 74119-4809 | Oil & Gas Operator | Feb 2026 |