| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | G-W Resources Oper. Co. | Gas Operator | Dec 1995 | |
| 2 | G. H. Preuitt | Oil & Gas Operator | Mar 2025 | |
| 3 | G. L. Stafford Jr. | Oil Operator | Dec 1996 | |
| 4 | G.E.C. Oil And Gas Operations | Gas Operator | Dec 1984 | |
| 5 | G.E.N.Y. Operations | Oil & Gas Operator | Dec 1999 | |
| 6 | Garner Engineering Inc. | Oil & Gas Operator | Apr 2025 | |
| 7 | Gary Drilling Company | Oil & Gas Operator | Dec 2000 | |
| 8 | Gate King Properties LLC | Oil & Gas Operator | Dec 2020 | |
| 9 | General Production Oil LLC | Oil Operator | Dec 2025 | |
| 10 | Geo Investment Inc. | Oil & Gas Operator | Dec 2003 | |
| 11 | Geo Petroleum, Inc. | Borger, TX 79007 | Oil & Gas Operator | Jun 2025 |
| 12 | George A. Jones | Oil & Gas Operator | Jan 2018 | |
| 13 | George E. Wise | Oil Operator | Dec 1989 | |
| 14 | George J. Peckham Jr. | Oil Operator | Dec 1999 | |
| 15 | George Kahn Operating Co. & Robert W. Lee | Oil & Gas Operator | Dec 2017 | |
| 16 | Gergen Homes Inc. | Oil & Gas Operator | Dec 2006 | |
| 17 | Gill Ranch Storage LLC | Oil & Gas Operator | Apr 2025 | |
| 18 | Glendale Oil LLC | Oil & Gas Operator | Apr 2025 | |
| 19 | Glenn Gas Inc. | Gas Operator | Mar 2025 | |
| 20 | Go Energy Inc. | Gas Operator | Dec 1987 | |
| 21 | Golden Gate Oil Operations LLC | Oil & Gas Operator | Mar 2025 | |
| 22 | Golden Valley Energy LLC | Oil & Gas Operator | Mar 2025 | |
| 23 | Goldenwest Partners LLC | Oil & Gas Operator | Dec 1998 | |
| 24 | Gordon Dole | Oil & Gas Operator | Apr 2025 | |
| 25 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 26 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 27 | Graner Oil Co. | Oil & Gas Operator | Dec 2015 | |
| 28 | Grapevine Energy LLC | Oil & Gas Operator | Apr 2025 | |
| 29 | Gravelle Family Trust | Oil & Gas Operator | Dec 1999 | |
| 30 | Gray Development Co. LLC | Oil & Gas Operator | Apr 2025 | |
| 31 | Grayco Energy Explor. Inc. | Oil & Gas Operator | Dec 2010 | |
| 32 | Grayson Service Inc. | Oil & Gas Operator | Mar 2025 | |
| 33 | Great Basins Petroleum Co. | Gas Operator | Mar 2015 | |
| 34 | Great Western Drilling | Oil Operator | Dec 2002 | |
| 35 | Green Earth Resources Inc. | Oil & Gas Operator | Dec 2020 | |
| 36 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2025 |
| 37 | Grover Collins | Oil & Gas Operator | Dec 2002 | |
| 38 | Gustafson Brothers Inc. | Oil & Gas Operator | Dec 2002 | |
| 39 | Guzman Energy Inc. | Oil & Gas Operator | Apr 2025 |