| 1 | H-Petro-R Inc | Edmond, OK 73013 | Oil & Gas Operator | Aug 2024 |
| 2 | H.L.S. Energy Co., Inc. | Uvalde, TX 78801 | Oil & Gas Operator | Aug 2003 |
| 3 | Hall Resources Corporation | Independence, MO 64057-2158 | Oil & Gas Operator | Jun 2016 |
| 4 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 5 | Hallmark Resources, Inc | Stilwell, OK 74960-0312 | Oil & Gas Operator | Sep 2020 |
| 6 | Hallum Construction Inc | Seminole, OK 74868-2427 | Oil & Gas Operator | Sep 2014 |
| 7 | Hardin Productions | Okemah, OK 74859 | Oil & Gas Operator | Dec 2006 |
| 8 | Harold G Raper Family Trust | Mansfield, TX 76063-1667 | Oil Operator | May 2023 |
| 9 | Harrod Leasing | Edmond, OK 73034 | Oil & Gas Operator | Sep 2024 |
| 10 | Harvey A B | Seminole, OK 74868-1724 | Oil Operator | Mar 2015 |
| 11 | Headington Energy Corporation | Dallas, TX 75231 | Oil & Gas Operator | Aug 1992 |
| 12 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 13 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 14 | Heaton Everill L | Exeter, CA 93221-2340 | Oil & Gas Operator | Sep 2014 |
| 15 | Hembree Brit W | Shawnee, OK 74802-1725 | Oil & Gas Operator | Aug 2024 |
| 16 | Henry Oil & Gas Inc | Oklahoma City, OK 73127 | Oil & Gas Operator | Jul 2009 |
| 17 | Henry Petroleum Inc | Oklahoma City, OK 73162-1757 | Oil & Gas Operator | Sep 2019 |
| 18 | Highmark Energy Operating, LLC | Poynor, TX 75782 | Oil & Gas Operator | Dec 2024 |
| 19 | Hill Oil Company Inc | Shawnee, OK 74804 | Oil & Gas Operator | Oct 2024 |
| 20 | Hilligoss Leonard | | Oil Operator | Aug 2022 |
| 21 | Hinkle Oil And Gas Inc | Oklahoma City, OK 73112-4275 | Oil & Gas Operator | Oct 2024 |
| 22 | HK Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 23 | Hoard John L Family Trust | Ardmore, OK 73402-1706 | Oil & Gas Operator | Jun 2022 |
| 24 | Hoco Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2024 |
| 25 | Holke Dave Consulting Inc | Meridian, ID 83646-4812 | Oil & Gas Operator | Oct 2024 |
| 26 | Homer Oil Co LLC | Holdenville, OK 74848-3232 | Oil Operator | Oct 2024 |
| 27 | Horizon Resources Inc | Fort Worth, TX 76101-1978 | Oil & Gas Operator | Jul 2006 |
| 28 | Horseshoe Oil Co | Cromwell, OK 74837 | Oil & Gas Operator | Dec 2021 |
| 29 | HRC Production Co | Houston, TX 77002 | Oil & Gas Operator | Sep 2024 |
| 30 | Huck Farms LLC | Stratford, OK 74872 | Oil & Gas Operator | Oct 2024 |
| 31 | Husky Petroleum | Seminole, OK 74818-1181 | Oil Operator | Feb 2012 |