| 1 | H & R Well Services, Inc. | FT Morgan, CO 80701 | Oil & Gas Operator | Apr 2015 |
| 2 | H & S Production, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2004 |
| 3 | H-M Resource Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Feb 2023 |
| 4 | Hale, Mike E. | Georgetown, TX 78628 | Oil & Gas Operator | Dec 2003 |
| 5 | Halvey Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 6 | Hamman, Blake | Graham, TX 76450 | Oil & Gas Operator | Jul 2020 |
| 7 | Harding Company | Dallas, TX 75244 | Oil & Gas Operator | Jan 2015 |
| 8 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 9 | Harvick, George R. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 10 | Hastings, J. W. Oil Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2010 |
| 11 | Hawthorne Oil And Gas Corp. | Houston, TX 77227 | Oil & Gas Operator | Sep 1993 |
| 12 | Hce Operating LLC | Smyer, TX 79367 | Oil & Gas Operator | Oct 2025 |
| 13 | Headline Resources, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Aug 1997 |
| 14 | Heart Land Petroleum Corporation | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 15 | Henry Petroleum Corp. | Midland, TX 79703 | Oil & Gas Operator | Mar 2001 |
| 16 | Herring, Ray | Graham, TX 76450 | Oil & Gas Operator | Jul 2014 |
| 17 | Hess, Jerry Operating Co. | Muenster, TX 76252 | Oil & Gas Operator | Oct 2025 |
| 18 | Hewitt, Alan P. | Midland, TX 79702 | Oil & Gas Operator | Aug 1997 |
| 19 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Oct 2025 |
| 20 | Heydrick Petroleum Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 21 | Hill Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2009 |
| 22 | Hoco Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 23 | Hofco, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 24 | Holden Energy Corporation | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2015 |
| 25 | Holli-Tex Supply Co. | Holliday, TX 76366 | Oil & Gas Operator | May 2018 |
| 26 | Howle Operating Account, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 1999 |
| 27 | HRH Energy Group Incorporated | Carrollton, TX 75006 | Oil & Gas Operator | Nov 2009 |
| 28 | Huntwood Resources, LLC | Huntsville, TX 77340 | Oil Operator | Oct 2025 |
| 29 | HW Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |