| 1 | G & R Oil Co. | St. John, KS 67576 | Oil Operator | Aug 2008 |
| 2 | G M G Oil & Gas Corp. | Morris, OK 74445 | Oil & Gas Operator | May 2025 |
| 3 | G R B Resources Inc | Tulsa, OK 74136-5108 | Oil & Gas Operator | Aug 2013 |
| 4 | Garms Oil Inc | Kingfisher, OK 73750-4207 | Oil & Gas Operator | Jun 2025 |
| 5 | Garvey Oil And Gas LLC | Kellyville, OK 74039-4428 | Oil & Gas Operator | Mar 2015 |
| 6 | Gaskins Glendell L | Slick, OK 74071 | Oil & Gas Operator | Jun 2025 |
| 7 | Gastar Exploration LLC | Tulsa, OK 74136-1921 | Oil & Gas Operator | Jun 2025 |
| 8 | Gazalski Richard S Dba Ski Energy | Henryetta, OK 74437-1208 | Oil & Gas Operator | Dec 2020 |
| 9 | Gda Investments Inc | Oklahoma City, OK 73123-0403 | Oil & Gas Operator | Jun 2025 |
| 10 | General Petroleum Corp | Sand Springs, OK 74063-6646 | Oil & Gas Operator | Jul 2015 |
| 11 | Genesis Inc | Seminole, OK 74818-1647 | Oil & Gas Operator | Sep 2014 |
| 12 | Genesis Petroleum Corp. | Fort Worth, TX 76116-7151 | Oil & Gas Operator | Mar 2011 |
| 13 | Geo American Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2025 |
| 14 | Geoex Resources Inc | | Oil & Gas Operator | Jan 1997 |
| 15 | Geological & Engineering Consultants | | Oil & Gas Operator | Jun 2025 |
| 16 | German Petroleum Company | Tulsa, OK 74169-1953 | Oil & Gas Operator | Oct 2009 |
| 17 | Gibson Les | Welty, OK 74833 | Oil & Gas Operator | Jul 2025 |
| 18 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Jul 2025 |
| 19 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |
| 20 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2025 |
| 21 | Golden Circle Production Co | Seminole, OK 74868 | Oil & Gas Operator | May 2002 |
| 22 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 23 | Gordon Brothers Oil Company | Stroud, OK 74079 | Oil & Gas Operator | Jul 2017 |
| 24 | Gordon Robert Oil Company | Stroud, OK 74070-0366 | Oil & Gas Operator | Jul 2001 |
| 25 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Oct 2025 |
| 26 | Grayhorse Operating Inc | Tulsa, OK 74103-4439 | Oil & Gas Operator | Jun 2025 |
| 27 | Great Western Land Co Inc | Tulsa, OK 74136-1517 | Oil & Gas Operator | Jun 2000 |
| 28 | Green Operating Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Jun 2025 |
| 29 | Greer Tom R | Ponca City, OK 74602-2444 | Oil & Gas Operator | May 2013 |
| 30 | Greg Hall Oil & Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Jun 2025 |
| 31 | Grubb Ronald J | Clinton, OK 73601-0906 | Oil & Gas Operator | Aug 2013 |