| 1 | G & G Services | Okmulgee, OK 74447 | Oil & Gas Operator | Feb 1993 |
| 2 | G M G Oil & Gas Corp. | Morris, OK 74445 | Oil & Gas Operator | Feb 2025 |
| 3 | Gala Resources, LTD. | Graham, TX 76450 | Oil & Gas Operator | Feb 2025 |
| 4 | Garvey Oil And Gas LLC | Kellyville, OK 74039-4428 | Oil & Gas Operator | Mar 2015 |
| 5 | Gaskins Glendell L | Slick, OK 74071 | Oil & Gas Operator | Mar 2025 |
| 6 | Gazalski Richard S Dba Ski Energy | Henryetta, OK 74437-1208 | Oil & Gas Operator | Dec 2020 |
| 7 | Gemini Exploration Inc | Oklahoma City, OK 73159 | Oil & Gas Operator | May 2013 |
| 8 | General Minerals Corp | Oklahoma City, OK 73105 | Oil & Gas Operator | Dec 2015 |
| 9 | Genesis Petroleum Corp. | Fort Worth, TX 76116-7151 | Oil & Gas Operator | Mar 2011 |
| 10 | Gibson C O | Boynton, OK 74422 | Oil Operator | May 2021 |
| 11 | Gibson Donald L | Boynton, OK 74422 | Oil Operator | Feb 2025 |
| 12 | Gibson Les | Welty, OK 74833 | Oil & Gas Operator | Feb 2025 |
| 13 | Gill Jet C Dba Jetco Inc | Okmulgee, OK 74447 | Oil & Gas Operator | Dec 2023 |
| 14 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Mar 2025 |
| 15 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
| 16 | Glendell L Gaskins Production LLC | Slick, OK 74071 | Oil & Gas Operator | Mar 2025 |
| 17 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Feb 2025 |
| 18 | Gold-Mont Oil Company Inc | Tulsa, OK 74107 | Oil & Gas Operator | Nov 2015 |
| 19 | Gomaco Inc | Tulsa, OK 74103-5061 | Oil & Gas Operator | Apr 2015 |
| 20 | Gomaco Operating Company | Tulsa, OK 74115 | Oil & Gas Operator | Mar 2025 |
| 21 | Gordon Brothers Oil Company | Stroud, OK 74079 | Oil & Gas Operator | Jul 2017 |
| 22 | Gordon Robert Oil Company | Stroud, OK 74070-0366 | Oil & Gas Operator | Jul 2001 |
| 23 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 24 | Graves J M | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2007 |
| 25 | Green Energy Company | Okmulgee, OK 74447 | Oil & Gas Operator | May 2013 |
| 26 | Green Operating Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Feb 2025 |
| 27 | Green William G | Jenks, OK 74037-3233 | Oil & Gas Operator | Apr 2020 |
| 28 | Greer Tom R | Ponca City, OK 74602-2444 | Oil & Gas Operator | May 2013 |
| 29 | Guinn David E | Cleveland, OK 74020 | Oil & Gas Operator | Feb 2025 |
| 30 | Gunkel Charley Wayne Rev Inter VIvos Trust | Schulter, OK 74460-0010 | Gas Operator | Dec 2015 |