| 5001 | Herd Producing Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Apr 2025 |
| 5002 | Hereford, J. A. Industries, Inc. | Nacogdoches, TX 75961 | Oil & Gas Operator | Apr 2025 |
| 5003 | Herencia Operating LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2025 |
| 5004 | Heritage Energy Corporation | Waco, TX 76710 | Oil & Gas Operator | Sep 2004 |
| 5005 | Heritage Expl. & Prod. Co., Inc. | Stafford, TX 77497 | Oil & Gas Operator | Dec 2000 |
| 5006 | Heritage Operating Co., Inc. The | Stafford, TX 77497 | Oil & Gas Operator | May 1997 |
| 5007 | Heritage Petroleum Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Apr 2025 |
| 5008 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2025 |
| 5009 | Heritage Resources, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Feb 2014 |
| 5010 | Heritage Standard Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2025 |
| 5011 | Hermat Salt Water Disposal, Inc. | Corpus Chrsti, TX 78426 | Oil Operator | Aug 2012 |
| 5012 | Hermes, A. J. | Lindsay, TX 76250 | Oil & Gas Operator | Mar 2018 |
| 5013 | Herms, Walter | Luling, TX 78648 | Oil & Gas Operator | Sep 2002 |
| 5014 | Herod Investments, Inc. | Ranger, TX 76470 | Oil & Gas Operator | Jul 1999 |
| 5015 | Herod, Bill | Ranger, TX 76470 | Oil & Gas Operator | Apr 2022 |
| 5016 | Herricks Oil Co. | San Angelo, TX 76906 | Oil & Gas Operator | Jan 2010 |
| 5017 | Herring, Casey Oil Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Nov 2008 |
| 5018 | Herring, D Oil & Gas Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Apr 2025 |
| 5019 | Herring, Ray | Graham, TX 76450 | Oil & Gas Operator | Jul 2014 |
| 5020 | Herrmann Energy | Amarillo, TX 79159 | Oil & Gas Operator | May 2015 |
| 5021 | Herrmann, J.B. | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2019 |
| 5022 | Herrmann, S. W. Oil & Gas | Amarillo, TX 79159 | Oil & Gas Operator | Apr 2025 |
| 5023 | Herschap Bros. | Bruni, TX 78344 | Oil & Gas Operator | Apr 2025 |
| 5024 | Hershey Oil Corporation | Seminole, TX 79360 | Oil & Gas Operator | Jul 1992 |
| 5025 | Herv Oil, LLC | Oklahoma City, OK 73116 | Oil Operator | Jan 2025 |
| 5026 | Herzfeld Fabricators Inc | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2017 |
| 5027 | Hess Bros. DRLG. Co. | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2008 |
| 5028 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 5029 | Hess Production | Quitaque, TX 79255 | Oil & Gas Operator | Apr 2025 |
| 5030 | Hess Seminole Assets LLC | Seminole, TX 79360 | Oil & Gas Operator | Aug 2017 |
| 5031 | Hess, Jerry Operating Co. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 5032 | Hewitt, Alan P. | Midland, TX 79702 | Oil & Gas Operator | Aug 1997 |
| 5033 | Hewitt, Robert J. | Victoria, TX 77901 | Oil & Gas Operator | Jun 2004 |
| 5034 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Apr 2025 |
| 5035 | Hexp Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 5036 | Heydrick Petroleum Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 5037 | Hez Petroleum Company | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 5038 | HG Operating LLC | Plano, TX 75026 | Oil & Gas Operator | Apr 2025 |
| 5039 | HGB Oil Company | Denver, CO 80224 | Oil Operator | Mar 2006 |
| 5040 | Hgi Corporation | Nada, TX 77460 | Oil & Gas Operator | Apr 2016 |
| 5041 | HGN Operating Co Inc | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 5042 | HGN Operating I, LLC | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 5043 | HH&F Partners | Katy, TX 77450 | Oil & Gas Operator | Sep 2019 |
| 5044 | Hi - Mountain Energy Corporation | Odessa, TX 79762 | Oil & Gas Operator | Apr 2025 |
| 5045 | Hi Plains Hydrocarbons, Inc. | Sunray, TX 79086 | Oil & Gas Operator | Oct 2002 |
| 5046 | Hibbard Energy, LP | Whitehouse, TX 75791 | Oil & Gas Operator | Apr 2025 |
| 5047 | Hibernia Resources III, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2023 |
| 5048 | Hibernia Resources IV, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2025 |
| 5049 | Hibernia Resources, LLC | Houston, TX 77027 | Oil & Gas Operator | Jun 2014 |
| 5050 | Hickman & Ickert | Olney, TX 76374 | Oil & Gas Operator | Feb 2002 |
| 5051 | Hickman-Jordan-Halligan Ranches | Blackwell, TX 79506 | Oil & Gas Operator | Feb 1998 |
| 5052 | Hickory Petroleum Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jun 2013 |
| 5053 | Hickox Oil Texas Company, Inc. | Mobile, AL 36689 | Oil & Gas Operator | Feb 1996 |
| 5054 | Hicks Exploration, LLC | Dover, OK 73734 | Gas Operator | Dec 2024 |
| 5055 | Hicon Gas Producers, Inc. | New York, NY 10110 | Oil & Gas Operator | Oct 1999 |
| 5056 | Hidalgo Oil & Exploration Corp. | New Braunfels, TX 78131 | Oil & Gas Operator | Apr 2025 |
| 5057 | Higginbotham, O. V. | Cedar Park, TX 78613 | Oil & Gas Operator | Jul 1996 |
| 5058 | High Bluff Operating, LLC | Littleton, CO 80161 | Oil & Gas Operator | May 2018 |
| 5059 | High Chapparal Oil Company | Plntersville, TX 77363 | Oil & Gas Operator | Aug 2003 |
| 5060 | High Desert Resources, L.L.C. | Midland, TX 79704 | Oil Operator | Apr 2025 |
| 5061 | High Island Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 5062 | High Island Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2017 |
| 5063 | High Mountain Oil & Gas | Hobbs, NM 88240 | Oil & Gas Operator | Jan 2019 |
| 5064 | High Mountain Oil & Gas, LLC | Hobbs, NM 88240 | Oil & Gas Operator | Apr 2025 |
| 5065 | High Noon Resources, LLC | Allen, TX 75013 | Oil & Gas Operator | Apr 2025 |
| 5066 | High Plains Gas Systems, Inc. | Houston, TX 77019 | Oil & Gas Operator | Apr 2025 |
| 5067 | High River Res Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Apr 2025 |
| 5068 | High Sierra Operating, LTD. | Canyon Lake, TX 78133 | Oil & Gas Operator | Mar 2008 |
| 5069 | High Sky Oil & Gas | Midland, TX 79705 | Oil & Gas Operator | Jun 2008 |
| 5070 | High Sky Partners LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2015 |
| 5071 | Higher Standard Oil Company,Inc. | Frisco, TX 75034 | Oil Operator | Apr 2025 |
| 5072 | Highground, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Apr 2025 |
| 5073 | Highland Production Company | Midland, TX 79701 | Oil & Gas Operator | Mar 1996 |
| 5074 | Highmark Energy Operating, LLC | Dallas, TX 75222 | Oil & Gas Operator | Apr 2025 |
| 5075 | Highmount Expl & Prod Texas LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2014 |
| 5076 | Highmount Operating LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2014 |
| 5077 | Highpeak Energy Holdings, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 5078 | Hightower Exploration | Kilgore, TX 75662 | Oil & Gas Operator | Apr 2025 |
| 5079 | Hilbers Oil & Gas | Archer City, TX 76351 | Oil & Gas Operator | Oct 2002 |
| 5080 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Apr 2025 |
| 5081 | Hill Operating LLC | Mineral Wells, TX 76068 | Oil & Gas Operator | Nov 2023 |
| 5082 | Hill Production Co Inc-Wisconsin | Humble, TX 77347 | Oil & Gas Operator | Jun 1993 |
| 5083 | Hill Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2009 |
| 5084 | Hill Production Company No. 2 | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 5085 | Hill, A G | Dallas, TX 75201 | Oil & Gas Operator | May 2008 |
| 5086 | Hill, Albert, Trust | Dallas, TX 75201 | Oil & Gas Operator | May 2008 |
| 5087 | Hill, Bill | Kilgore, TX 75663 | Oil Operator | Mar 2014 |
| 5088 | Hill, Charles Drilling, Inc. | Grand Prairie, TX 75052 | Oil & Gas Operator | Apr 2025 |
| 5089 | Hill, Hub, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jan 1994 |
| 5090 | Hill, R.M. Operating Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 5091 | Hill, T. R. | Graham, TX 76450 | Oil & Gas Operator | Apr 1995 |
| 5092 | Hill-Lake Gas Storage, L.P. | Houston, TX 77057 | Oil & Gas Operator | Aug 2010 |
| 5093 | Hill-Lake Gas Storage, LLC | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2025 |
| 5094 | Hillcrest Petroleum, LLC | Midland, TX 79707 | Oil & Gas Operator | Jun 2019 |
| 5095 | Hilliard Oil | Bronte, TX 76933 | Oil & Gas Operator | Mar 2008 |
| 5096 | Hilliard Oil & Gas Inc | New Orleans, LA 70112 | Oil & Gas Operator | May 2001 |
| 5097 | Hilliard Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2009 |
| 5098 | Hillin Prod. Co. | Odessa, TX 79760 | Oil & Gas Operator | Apr 2002 |
| 5099 | Hillin Simon/Prime Expl., L.C. | Midland, TX 79702 | Oil & Gas Operator | Jun 2000 |
| 5100 | Hillin, T. A. | Kerrville, TX 78028 | Oil & Gas Operator | Aug 2020 |