| 1 | H & H Operating | Olney, TX 76374 | Oil & Gas Operator | Mar 2025 |
| 2 | H & S Production, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2004 |
| 3 | H P S Investments | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 4 | H&P Operating | Megargel, TX 76370 | Oil & Gas Operator | Jan 2015 |
| 5 | H. I. M. Producers | Graham, TX 76450 | Oil & Gas Operator | May 1999 |
| 6 | Haggard, E. A. | Graham, TX 76450 | Oil & Gas Operator | Apr 2001 |
| 7 | Haigood & Campbell | Archer City, TX 76351 | Oil & Gas Operator | Mar 2025 |
| 8 | Hale Oil & Gas Properties | Graham, TX 76450 | Oil & Gas Operator | Jul 1997 |
| 9 | Halek Energy L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Jan 2014 |
| 10 | Halvey Energy Co. | Midland, TX 79702 | Oil & Gas Operator | Oct 2004 |
| 11 | Hamilton, Eddy R. | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2025 |
| 12 | Hamilton, W. B., Estate | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2004 |
| 13 | Hane Operating, Inc. | Santa Anna, TX 76878 | Oil & Gas Operator | Sep 2005 |
| 14 | Harding Company | Dallas, TX 75244 | Oil & Gas Operator | Jan 2015 |
| 15 | Harding Exploration, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2016 |
| 16 | Hardrock Operating Company, Inc. | Fort Worth, TX 76161 | Oil & Gas Operator | Mar 2025 |
| 17 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 18 | Harper, William E. | Woodson, TX 76491 | Oil & Gas Operator | Jul 2016 |
| 19 | Harrell Operating Inc | Graham, TX 76450 | Oil & Gas Operator | Sep 2005 |
| 20 | Harrell Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Jun 2008 |
| 21 | Harrell, Charles | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 22 | Harris Energy Partners Op, LLC | Fort Worth, TX 76116 | Oil Operator | Mar 2025 |
| 23 | Harvey, James W. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2008 |
| 24 | Harwell Enterprises Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Jan 2005 |
| 25 | Hastings, J. W. Oil Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2010 |
| 26 | Hatcher, Ray | Burkburnett, TX 76354 | Oil & Gas Operator | Jun 2002 |
| 27 | Hatler Oil Company, Inc. | Graham, TX 76450 | Oil & Gas Operator | Sep 2000 |
| 28 | Hawkins, G. A. | Graham, TX 76450 | Oil & Gas Operator | Dec 2013 |
| 29 | Haynes & Shirley Production Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Mar 2025 |
| 30 | Hays & Boydston | Graham, TX 76450 | Oil & Gas Operator | Mar 1994 |
| 31 | Hays Partnership | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 32 | Hays, David H. | Olney, TX 76374 | Oil & Gas Operator | Dec 1995 |
| 33 | Hays, John H. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 34 | Headline Resources, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Aug 1997 |
| 35 | Henderson & Erickson, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 36 | Hep Oil Company LTD | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2012 |
| 37 | Hep Oil GP, LLC | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 38 | Herring, Ray | Graham, TX 76450 | Oil & Gas Operator | Jul 2014 |
| 39 | Hess, Jerry Operating Co. | Muenster, TX 76252 | Oil & Gas Operator | Mar 2025 |
| 40 | Heydrick Petroleum Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 2025 |
| 41 | Hez Petroleum Company | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 42 | Hickman & Ickert | Olney, TX 76374 | Oil & Gas Operator | Feb 2002 |
| 43 | Hill Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2009 |
| 44 | Hill, Hub, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jan 1994 |
| 45 | Hill, R.M. Operating Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 46 | Hill, T. R. | Graham, TX 76450 | Oil & Gas Operator | Apr 1995 |
| 47 | Hilltex Operating Company, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jul 2021 |
| 48 | Hines, Ralph, Jr. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2002 |
| 49 | Hodgden Operating Co., Inc. | Enid, OK 73702 | Oil & Gas Operator | Jan 2025 |
| 50 | Holcomb Company, The | Freer, TX 78357 | Oil & Gas Operator | Aug 1996 |
| 51 | Holli-Tex Supply Co. | Holliday, TX 76366 | Oil & Gas Operator | May 2018 |
| 52 | Hood, J. Frank, Jr. | Arlington, TX 76006 | Oil & Gas Operator | Mar 2025 |
| 53 | Horany, Ray & Ernest | Olney, TX 76374 | Oil & Gas Operator | May 2002 |
| 54 | Horn, W. J. | Graham, TX 76450 | Oil & Gas Operator | Oct 2004 |
| 55 | Horseshoe Production, LLC | Bryson, TX 76427 | Oil Operator | Mar 2025 |
| 56 | HPC Operating, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Mar 2008 |
| 57 | Hughes, Bill Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 58 | Hulsey Larry O & Co | Graham, TX 76046 | Oil & Gas Operator | Jun 2012 |
| 59 | Hulsey Oil Company | Dallas, TX 75205 | Oil & Gas Operator | Aug 1999 |
| 60 | Hunter & McDonald | Wichita Falls, TX 76309 | Oil & Gas Operator | Jul 2001 |
| 61 | Hunter Brothers | Wichita Falls, TX 76302 | Oil & Gas Operator | Jul 2007 |
| 62 | HW Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 2025 |