| 1 | H.A.N. Operating Incorporated | Clyde, TX 79510 | Oil & Gas Operator | Aug 2016 |
| 2 | Hailey Energy Corporation | Wesson, MS 39191 | Gas Operator | May 2013 |
| 3 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Oct 2025 |
| 4 | Hane Operating, Inc. | Santa Anna, TX 76878 | Oil & Gas Operator | Sep 2005 |
| 5 | Hardway Prod & Operating, LLC | Abilene, TX 79608 | Oil & Gas Operator | Aug 2016 |
| 6 | Harms, Vance N. | Talpa, TX 76882 | Oil & Gas Operator | Mar 2016 |
| 7 | Harper, Wayne | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 8 | Harrell Operating Inc | Graham, TX 76450 | Oil & Gas Operator | Sep 2005 |
| 9 | Harvest Petroleum Inc. | Frisco, TX 75033 | Oil & Gas Operator | Oct 2025 |
| 10 | Hay Creek Investments, L.L.C. | Santa Anna, TX 76878 | Oil Operator | Jul 2018 |
| 11 | Hayes Oil & Gas Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2005 |
| 12 | Haynes Production Company, Inc. | Brownwood, TX 76801 | Oil & Gas Operator | Dec 2006 |
| 13 | Heartland Resources, Inc. | Temple, TX 76501 | Oil & Gas Operator | Mar 2008 |
| 14 | Herring, Casey Oil Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Nov 2008 |
| 15 | Herring, D Oil & Gas Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Oct 2025 |
| 16 | Hewitt, Alan P. | Midland, TX 79702 | Oil & Gas Operator | Aug 1997 |
| 17 | HGN Operating Co. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 18 | HGN Operating I, LLC | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 19 | Hill Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2009 |
| 20 | Hofco, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 21 | Holcomb Enterprises | Clyde, TX 79510 | Oil & Gas Operator | Aug 2003 |
| 22 | Holland Oil & Gas | Brookesmith, TX 76827 | Oil & Gas Operator | Dec 2010 |
| 23 | Holloway Oil Company | Austin, TX 78764 | Oil & Gas Operator | Feb 2004 |
| 24 | Hopewell Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 25 | Houston Oil & Gas Company, Inc. | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 26 | Hughes, Bob Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | Jul 2011 |
| 27 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 28 | Hunter, Rocquelle | Coleman, TX 76834 | Oil Operator | Oct 2025 |
| 29 | Huntland Properties, LTD. | Santa Anna, TX 76878 | Oil & Gas Operator | Oct 2025 |