| 4701 | H-M Resource Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Feb 2023 |
| 4702 | H-S Exploration | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 4703 | H-Two-O Investments | Iowa Park, TX 76367 | Oil Operator | Sep 2019 |
| 4704 | H. & J. Drilling Company | Fort Worth, TX 76114 | Oil & Gas Operator | Aug 2003 |
| 4705 | H. & L. Oil Company | Midland, TX 79707 | Oil & Gas Operator | Mar 2005 |
| 4706 | H. Bryan Poff, LLC | Cedar Park, TX 78613 | Oil & Gas Operator | Oct 2018 |
| 4707 | H. C. Oil Co. | Weatherford, TX 76085 | Oil & Gas Operator | Apr 2025 |
| 4708 | H. D. Investments | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 4709 | H. I. M. Producers | Graham, TX 76450 | Oil & Gas Operator | May 1999 |
| 4710 | H.A.N. Operating Incorporated | Clyde, TX 79510 | Oil & Gas Operator | Aug 2016 |
| 4711 | H.E.R. Operating, LLC | Silsbee, TX 77656 | Oil & Gas Operator | Apr 2025 |
| 4712 | H.E.X.T. Operating, LTD. | Buna, TX 77612 | Oil Operator | Mar 2024 |
| 4713 | H.K.E. | Stafford, TX 77497 | Oil & Gas Operator | Apr 2025 |
| 4714 | H.L. Clark Oil Company LLC | Whitesboro, TX 76273 | Oil Operator | Apr 2025 |
| 4715 | H.L.S. Energy Co., Inc. | Uvalde, TX 78801 | Oil & Gas Operator | Aug 2003 |
| 4716 | H.P. Slagel Producing Co., LLC | San Angelo, TX 76902 | Oil Operator | Apr 2025 |
| 4717 | H3 Operating, LLC | Springtown, TX 76082 | Oil & Gas Operator | May 2020 |
| 4718 | Ha.P.C. Oil, Inc. | Gonzales, TX 78629 | Oil & Gas Operator | Aug 2006 |
| 4719 | Haas, C. F. Oil & Gas Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Apr 2025 |
| 4720 | Haass Ranch Oil Company, LLC | Castroville, TX 78009 | Oil Operator | Apr 2025 |
| 4721 | Habanero Oil & Gas Operating,LLC | Austin, TX 78701 | Oil & Gas Operator | Feb 2018 |
| 4722 | Haber Resources Corporation | Houston, TX 77063 | Oil & Gas Operator | Mar 1999 |
| 4723 | Hacker Brothers Oil Company, Inc | Muenster, TX 76252 | Oil & Gas Operator | May 2004 |
| 4724 | Hacker Brothers Well Service,Inc | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 4725 | Hacker, Freddie J. | Muenster, TX 76252 | Oil & Gas Operator | Dec 2012 |
| 4726 | Hadaway Consult And Engineer,LLC | Canadian, TX 79014 | Oil & Gas Operator | Apr 2025 |
| 4727 | Hadaway Engineering Inc | Canadian, TX 79014 | Oil & Gas Operator | Jul 2015 |
| 4728 | Haddad Boynton, LLC | Jonesville, TX 75659 | Oil Operator | Apr 2025 |
| 4729 | Hadley Oil | Nocona, TX 76255 | Oil Operator | Jan 2014 |
| 4730 | Hadley Oil Company, LLC | Nocona, TX 76255 | Oil Operator | Apr 2025 |
| 4731 | Hadson Energy Resources Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 1994 |
| 4732 | Haggard Operating Group/Oil | Atascosa, TX 78002 | Oil & Gas Operator | Apr 2025 |
| 4733 | Haggard, E. A. | Graham, TX 76450 | Oil & Gas Operator | Apr 2001 |
| 4734 | Haider Operating, LLC | Pampa, TX 79066 | Oil & Gas Operator | Apr 2025 |
| 4735 | Haigood & Campbell | Archer City, TX 76351 | Oil & Gas Operator | Apr 2025 |
| 4736 | Haigood, Danny | Portland, TX 78374 | Oil & Gas Operator | Mar 2008 |
| 4737 | Hailey Energy Corporation | Wesson, MS 39191 | Gas Operator | May 2013 |
| 4738 | Haimo Oil & Gas LLC | Houston, TX 77042 | Oil & Gas Operator | Aug 2020 |
| 4739 | Hair, Roger D. | Post, TX 79356 | Oil & Gas Operator | Apr 2025 |
| 4740 | Halbouty, Michel T. | Houston, TX 77056 | Oil & Gas Operator | Aug 1997 |
| 4741 | Halcon Operating Co., Inc. | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 4742 | Halcon Resources Operating, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2013 |
| 4743 | Hale Oil & Gas Properties | Graham, TX 76450 | Oil & Gas Operator | Jul 1997 |
| 4744 | Hale, Mike E. | Georgetown, TX 78628 | Oil & Gas Operator | Dec 2003 |
| 4745 | Halek Energy L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Jan 2014 |
| 4746 | Halex Oil Corporation | Houston, TX 77057 | Oil & Gas Operator | Apr 2025 |
| 4747 | Hall Energy Co. | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2016 |
| 4748 | Hall Energy Company LLC | Oklahoma City, OK 73120-5020 | Oil & Gas Operator | Jul 2022 |
| 4749 | Hall Exploration, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2025 |
| 4750 | Hall Oil & Gas | Coahoma, TX 79511 | Oil & Gas Operator | Apr 2025 |
| 4751 | Hall Oil And Gas LLC | Midland, TX 79707 | Oil & Gas Operator | Apr 2025 |
| 4752 | Hall, D. Corporation | La Grange, TX 78945 | Oil & Gas Operator | Mar 2013 |
| 4753 | Hall, E. G., Oil Co. | Mexia, TX 76667 | Oil & Gas Operator | Apr 2025 |
| 4754 | Hall-Houston Expl. II, L.P. | Houston, TX 77027 | Oil & Gas Operator | Apr 2025 |
| 4755 | Hall-Houston Expl. III, L.P. | Houston, TX 77027 | Oil & Gas Operator | Jul 2013 |
| 4756 | Hall-Houston Oil Company | Houston, TX 77002 | Oil & Gas Operator | Oct 2002 |
| 4757 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 4758 | Halliburton Operating Company | Plano, TX 75093 | Oil & Gas Operator | Apr 2025 |
| 4759 | Hallwood Energy Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2005 |
| 4760 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2024 |
| 4761 | Hallwood Petroleum, LLC | Dallas, TX 75219 | Oil & Gas Operator | Jan 2010 |
| 4762 | Halo Energy L.L.C. | Kilgore, TX 75662 | Oil Operator | Apr 2025 |
| 4763 | Halvey Energy Co. | Midland, TX 79702 | Oil & Gas Operator | Oct 2004 |
| 4764 | Halvey Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 4765 | Ham Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Feb 2000 |
| 4766 | Hamill Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1999 |
| 4767 | Hamill, Claud B. Estate Of | Houston, TX 77002 | Oil & Gas Operator | Nov 1995 |
| 4768 | Hamill, Flora Oil Co. | Levelland, TX 79336 | Oil & Gas Operator | Apr 2025 |
| 4769 | Hamilton Brothers | Plainview, TX 79073 | Oil & Gas Operator | Mar 2008 |
| 4770 | Hamilton Brothers Oil Co. | Houston, TX 77057 | Oil & Gas Operator | Mar 2015 |
| 4771 | Hamilton, Clay | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Apr 2025 |
| 4772 | Hamilton, Eddy R. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 4773 | Hamilton, J. R. | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Apr 2025 |
| 4774 | Hamilton, John M. | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2001 |
| 4775 | Hamilton, W. B., Estate | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2004 |
| 4776 | Hamilton-Tedford Oper. Co., LLC | Wichita Falls, TX 76301 | Oil Operator | May 2007 |
| 4777 | Hamm, Richard | Monahans, TX 79756 | Oil & Gas Operator | Mar 1994 |
| 4778 | Hamm, Richard Inc. | Monahans, TX 79756 | Oil & Gas Operator | Apr 2025 |
| 4779 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Apr 2025 |
| 4780 | Hamman, Blake | Graham, TX 76450 | Oil & Gas Operator | Jul 2020 |
| 4781 | Hammer Oil Company | Post, TX 79356 | Oil & Gas Operator | Jun 2002 |
| 4782 | Hammon Properties | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 1996 |
| 4783 | Hamon Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2011 |
| 4784 | Hampton Oil & Gas | Early, TX 76802 | Gas Operator | Feb 2012 |
| 4785 | Hampton Resources Corporation | Houston, TX 77010 | Oil & Gas Operator | Mar 1996 |
| 4786 | Hampton, Jno. W. & Son | Wichita Falls, TX 76302 | Oil & Gas Operator | Nov 1998 |
| 4787 | Hanaco Operating | Holliday, TX 76366 | Oil Operator | Mar 2008 |
| 4788 | Hanaco, LLC | Holliday, TX 76366 | Oil Operator | Dec 2017 |
| 4789 | Hane Operating, Inc. | Santa Anna, TX 76878 | Oil & Gas Operator | Sep 2005 |
| 4790 | Hanger Oil, L.L.C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 4791 | Hank Oil & Gas, Inc. | Houston, TX 77056 | Oil & Gas Operator | Oct 2023 |
| 4792 | Hankamer, Curtis Corporation,The | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 4793 | Hankey Oil Company | Houston, TX 77027 | Oil & Gas Operator | Feb 2010 |
| 4794 | Hankey Operating, Inc. | Houston, TX 77027 | Oil & Gas Operator | Mar 2016 |
| 4795 | Hanks, Christopher Glenn | Gainesville, TX 76240 | Oil & Gas Operator | Apr 2025 |
| 4796 | Hanley Petroleum Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2017 |
| 4797 | Hanna Oil And Gas Company | Fort Smith, AR 72901 | Oil & Gas Operator | Jan 2025 |
| 4798 | Hannathon Petroleum II, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 4799 | Hannathon Petroleum, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 4800 | Hannis Operating, LLC | Olney, TX 76374 | Oil & Gas Operator | Apr 2025 |