| 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 | Apr 2025 |
| 3 | Galaxy Corporation (The) | Sapulpa, OK 74066 | Oil & Gas Operator | Apr 2025 |
| 4 | Ganer Oil Company | Blackwell, OK 74631-4221 | Oil & Gas Operator | Jan 2022 |
| 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 | Apr 2025 |
| 7 | Gaskins William | Lincoln, NE 68516 | Oil Operator | Dec 1998 |
| 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 | Mar 2025 |
| 10 | Gemini Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 11 | General Trading Co Inc | Carrollton, TX 75011-2309 | Oil Operator | Jul 2017 |
| 12 | Genesis Inc | Seminole, OK 74818-1647 | Oil & Gas Operator | Sep 2014 |
| 13 | Genzer Jim W | Sapulpa, OK 74067-1252 | Oil & Gas Operator | May 2013 |
| 14 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 15 | Gibson Les | Welty, OK 74833 | Oil & Gas Operator | Apr 2025 |
| 16 | Gill Jet C Dba Jetco Inc | Okmulgee, OK 74447 | Oil & Gas Operator | Dec 2023 |
| 17 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 18 | Glendell L Gaskins Production LLC | Slick, OK 74071 | Oil & Gas Operator | Apr 2025 |
| 19 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Mar 2025 |
| 20 | Glimp Oil Company | Drumright, OK 74030-0391 | Oil & Gas Operator | Mar 1998 |
| 21 | Glimp Oil Company LLC | Drumright, OK 74030 | Oil & Gas Operator | Mar 2025 |
| 22 | GMW Petroleum LLC | Skiatook, OK 74070 | Oil & Gas Operator | Mar 2025 |
| 23 | Gold-Mont Oil Company Inc | Tulsa, OK 74107 | Oil & Gas Operator | Nov 2015 |
| 24 | Gordon Brothers Oil Company | Stroud, OK 74079 | Oil & Gas Operator | Jul 2017 |
| 25 | Gordon Robert Oil Company | Stroud, OK 74070-0366 | Oil & Gas Operator | Jul 2001 |
| 26 | Gore Sidney | Tulsa, OK 74101 | Oil & Gas Operator | Dec 2016 |
| 27 | Graves J M | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2007 |
| 28 | Grayhorse Operating Inc | Tulsa, OK 74103-4439 | Oil & Gas Operator | Mar 2025 |
| 29 | Grayson Operating LLC | Ada, OK 74820 | Oil & Gas Operator | Mar 2025 |
| 30 | Great Horned Owls, LLC | Katy, TX 77494 | Oil & Gas Operator | Mar 2025 |
| 31 | Great Plains Operating Inc | Bristow, OK 74010 | Oil & Gas Operator | Dec 1998 |
| 32 | Great Plains Petroleum, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Feb 2025 |
| 33 | Green Energy Company | Okmulgee, OK 74447 | Oil & Gas Operator | May 2013 |
| 34 | Green Operating Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Feb 2025 |
| 35 | Green William G | Jenks, OK 74037-3233 | Oil & Gas Operator | Apr 2020 |
| 36 | Greenwood Janet | Mannford, OK 74044 | Oil Operator | Apr 2014 |
| 37 | Greg Hall Oil & Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Mar 2025 |
| 38 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2025 |
| 39 | Ground Development Company Inc | Dallas, TX 75229-0377 | Oil & Gas Operator | Jan 2013 |
| 40 | Grubb Ronald J | Clinton, OK 73601-0906 | Oil & Gas Operator | Aug 2013 |
| 41 | Guest Petroleum Incorporated | Edmond, OK 73013 | Oil & Gas Operator | Mar 2025 |
| 42 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 43 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2025 |