| 1 | G N K Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 2 | G. R. Goodwill | | Oil & Gas Operator | Jun 1997 |
| 3 | Gasco Inc | | Oil & Gas Operator | Jun 1998 |
| 4 | Geo Co., Inc. | Austin, TX 78745 | Oil Operator | Apr 1988 |
| 5 | George R Schurman | | Oil & Gas Operator | Oct 2015 |
| 6 | Gep Haynesville II, LLC | | Gas Operator | Dec 2024 |
| 7 | Gep Haynesville, LLC | | Gas Operator | Dec 2021 |
| 8 | Gerald C. Eddy | | Oil & Gas Operator | Oct 1987 |
| 9 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 10 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 11 | Gilliam Petroleum, LTD | | Oil & Gas Operator | Mar 2013 |
| 12 | Glenda Petroleum Corp. | | Gas Operator | Oct 1991 |
| 13 | Goldrus Producing Company | Houston, TX 77064 | Oil & Gas Operator | Aug 2009 |
| 14 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 15 | Goodrich Petroleum Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2022 |
| 16 | GPM, Inc. | | Oil & Gas Operator | Jun 1994 |
| 17 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 18 | Greenbrier Oper. Co. | Dallas, TX 75229 | Oil & Gas Operator | Feb 2001 |
| 19 | Greer Energy, Inc. | | Oil Operator | Dec 1996 |
| 20 | Grigsby Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 21 | Grogan Field Production, L.L.C. | | Oil Operator | Jan 2025 |
| 22 | Grynberg Petroleum Company | Greenwood Vge, CO 80111-3326 | Oil & Gas Operator | Oct 2019 |
| 23 | Guernsey Petroleum Corporation | Atlanta, GA 30318 | Oil & Gas Operator | Nov 1997 |