| 12701 | Harper Hefte, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | May 2025 |
| 12702 | Harper Joe Howard Dba J H Field Service | Nowata, OK 74048-9704 | Oil & Gas Operator | Dec 2024 |
| 12703 | Harper Oil And Gas, LLC | Pratt, KS 67124 | Oil & Gas Operator | Jan 2025 |
| 12704 | Harper Oil Co. | Denver, CO 80217 | Oil & Gas Operator | Jan 2025 |
| 12705 | Harper Production, LLC | Spearman, TX 79081 | Oil & Gas Operator | May 2025 |
| 12706 | Harper, Clint | Woodson, TX 76491 | Oil & Gas Operator | May 2025 |
| 12707 | Harper, Mr. William | Clyde, NY 14433 | Gas Operator | Dec 2023 |
| 12708 | Harper, Wayne | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 12709 | Harper, William E. | Woodson, TX 76491 | Oil & Gas Operator | Jul 2016 |
| 12710 | Harper, William E. Estate Of | Woodson, TX 76491 | Oil & Gas Operator | Feb 2025 |
| 12711 | Harrell Oil Company LLC | Ardmore, OK 73402 | Oil Operator | Jan 2025 |
| 12712 | Harrell Operating Inc | Graham, TX 76450 | Oil & Gas Operator | Sep 2005 |
| 12713 | Harrell Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Jun 2008 |
| 12714 | Harrell Petroleum Inc | Oklahoma City, OK 73102-7201 | Oil & Gas Operator | Oct 2017 |
| 12715 | Harrell Verlan W | Oklahoma City, OK 73102-7201 | Oil & Gas Operator | Nov 1999 |
| 12716 | Harrell, Charles | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 12717 | Harrier Holdings, LTD. | Burnet, TX 78611 | Oil Operator | May 2025 |
| 12718 | Harrigan Energy Partners, Inc. | Houston, TX 77058 | Oil & Gas Operator | Sep 2010 |
| 12719 | Harrigan Operating, LLC | Houston, TX 77258 | Oil & Gas Operator | Apr 2020 |
| 12720 | Harrington Billy B | Depew, OK 74028-3495 | Oil & Gas Operator | May 2006 |
| 12721 | Harrington Oil Inc. | | Oil & Gas Operator | Apr 1978 |
| 12722 | Harrington Orville | Dewey, OK 74029 | Oil Operator | Feb 2025 |
| 12723 | Harrington SR Tommy W | Drumright, OK 74030-5778 | Oil Operator | May 2015 |
| 12724 | Harris & Payne-Randel Drilling | | Oil & Gas Operator | Dec 1989 |
| 12725 | Harris & Walton | Midland, TX 79702 | Oil & Gas Operator | Feb 2004 |
| 12726 | Harris B D | Norman, OK 73071-4802 | Oil & Gas Operator | Apr 2014 |
| 12727 | Harris Energy Partners Op, LLC | Fort Worth, TX 76116 | Oil Operator | May 2025 |
| 12728 | Harris Energy Services, LLC | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 12729 | Harris Engineering Co | Dallas, TX 75248 | Oil & Gas Operator | Dec 1996 |
| 12730 | Harris Les And Canonie Tony SR | | Gas Operator | Jan 1989 |
| 12731 | Harris Mildred C | Tulsa, OK 74120 | Oil & Gas Operator | Feb 2025 |
| 12732 | Harris Minerals Corp (The) | Oklahoma City, OK 73162-1045 | Oil & Gas Operator | Mar 2025 |
| 12733 | Harris Oil & Gas | | Oil & Gas Operator | Jul 1995 |
| 12734 | Harris Oil & Gas Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2016 |
| 12735 | Harris Olin | Okmulgee, OK 74447-8508 | Oil Operator | Feb 2012 |
| 12736 | Harris, David | Toronto, KS 66777 | Oil Operator | Nov 2024 |
| 12737 | Harris, Jake, Trustee | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 2001 |
| 12738 | Harris, Sam E. | Albany, TX 76430 | Oil & Gas Operator | Aug 2003 |
| 12739 | Harris, William H. Jr. | Le Roy, NY 14482 | Gas Operator | Dec 2023 |
| 12740 | Harrison & Lee | | Oil Operator | Sep 1996 |
| 12741 | Harrison Drilling Co | | Oil & Gas Operator | Mar 1981 |
| 12742 | Harrison Energy | Tippecanoe, OH 44699 | Oil & Gas Operator | Dec 2000 |
| 12743 | Harrison Interests, LTD. | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 12744 | Harrison Oil & Gas Inc | Houston, TX 77019 | Oil & Gas Operator | Jan 2025 |
| 12745 | Harrison, Dan J III&Bruce F Est | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 12746 | Harrison, Dan J. III&Bruce F. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 12747 | Harrison, Mark V. | Madison, KS 66860 | Oil Operator | Jul 1995 |
| 12748 | Harrison, Sam G. Oil, Inc. | Houston, TX 77019 | Oil & Gas Operator | Nov 2019 |
| 12749 | Harrison, Thomas D | Park City, UT 84060-7307 | Gas Operator | Dec 1998 |
| 12750 | Harrison-Wright Oil Company LLC | Tulsa, OK 74133-7035 | Oil & Gas Operator | Feb 2025 |
| 12751 | Harrod Leasing | Edmond, OK 73034 | Oil & Gas Operator | Feb 2025 |
| 12752 | Harry Feder | | Oil & Gas Operator | Dec 1999 |
| 12753 | Harry L. Neeb | | Oil Operator | May 1985 |
| 12754 | Harsh International Inc | | Oil & Gas Operator | Dec 2013 |
| 12755 | Hart & McFarland | Vivian, LA 71082 | Oil & Gas Operator | May 2025 |
| 12756 | Hart David | Chickasha, OK 73018-7756 | Oil & Gas Operator | Mar 2015 |
| 12757 | Hart Energies, LLC | Tulsa, OK 74133 | Oil & Gas Operator | Dec 2016 |
| 12758 | Hart Energy LLC | | Oil Operator | Dec 2024 |
| 12759 | Hart Oil & Gas Inc | Houston, TX 77024 | Oil & Gas Operator | Jan 2017 |
| 12760 | Hart Oil, LLC | | Oil Operator | Dec 2014 |
| 12761 | Hart Petroleum Services, Inc | Robstown, TX 78380 | Oil & Gas Operator | May 2025 |
| 12762 | Hart, Nick And Connie | Paola, KS 66071 | Oil Operator | Jan 2025 |
| 12763 | Hartco Oil Co. | | Oil Operator | Jan 2025 |
| 12764 | Hartel, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Aug 1997 |
| 12765 | Harter Energy Inc. | Tulsa, OK 74105 | Oil & Gas Operator | Mar 2025 |
| 12766 | Harter Oil Company | | Oil & Gas Operator | Apr 2011 |
| 12767 | Harter, Ron | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 12768 | Hartley Natural Resource Development | | Oil & Gas Operator | Feb 2025 |
| 12769 | Hartline Tom | Drumright, OK 74030 | Oil Operator | Jan 2025 |
| 12770 | Hartman Oil And Gas Company | | Oil Operator | Dec 1998 |
| 12771 | Hartman Oil Co., Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jan 2025 |
| 12772 | Hartman W L Trus | | Oil Operator | Jun 1992 |
| 12773 | Hartoil Corporation | Post, TX 79356 | Oil & Gas Operator | May 2025 |
| 12774 | Harus Inc | Indiana, PA 15701-9401 | Oil & Gas Operator | Dec 2024 |
| 12775 | Harvard Investments, Inc. | | Oil & Gas Operator | Oct 2002 |
| 12776 | Harvard Petroleum Company, LLC | Roswell, NM 88202 | Oil & Gas Operator | May 2025 |
| 12777 | Harvard Petroleum Corporation | Roswell, NM 88201 | Oil & Gas Operator | Dec 2004 |
| 12778 | Harvest (Us) Holdings, Inc | Houston, TX 77077 | Oil & Gas Operator | Apr 2011 |
| 12779 | Harvest Energy Company | Englewood, CO 80110 | Oil & Gas Operator | Aug 2001 |
| 12780 | Harvest Oil & Gas, LLC | | Oil & Gas Operator | Feb 2012 |
| 12781 | Harvest Operating Company, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Dec 1997 |
| 12782 | Harvest Petroleum Inc. | Frisco, TX 75033 | Oil & Gas Operator | May 2025 |
| 12783 | Harvest Petroleum Partners, LLC | Midland, TX 79705 | Oil & Gas Operator | Mar 2025 |
| 12784 | Harvey A B | Seminole, OK 74868-1724 | Oil Operator | Mar 2015 |
| 12785 | Harvey Brothers Oil & Gas | Corpus Chrsti, TX 78408 | Oil & Gas Operator | Jul 2004 |
| 12786 | Harvey Broyles | | Oil & Gas Operator | May 2012 |
| 12787 | Harvey Broyles & Munoco Co. | | Oil & Gas Operator | Jan 2002 |
| 12788 | Harvey Broyles, Et Al | | Gas Operator | Nov 1985 |
| 12789 | Harvey E Yates Company | Roswell, NM 88202 | Oil & Gas Operator | Feb 2015 |
| 12790 | Harvey, James W. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2008 |
| 12791 | Harvey, Mike W. Oil & Gas | Corpus Chrsti, TX 78408 | Oil & Gas Operator | Aug 2003 |
| 12792 | Harvey, Robert E., Jr. | Nixon, TX 78140 | Oil & Gas Operator | Oct 2003 |
| 12793 | Harvick Oil Co. | Albany, TX 76430 | Oil & Gas Operator | Feb 2009 |
| 12794 | Harvick, George R. | Albany, TX 76430 | Oil & Gas Operator | May 2025 |
| 12795 | Harwell Enterprises | Loveland, CO 80537 | Gas Operator | Nov 2019 |
| 12796 | Harwell Enterprises Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Jan 2005 |
| 12797 | Harwood Exploration, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Aug 1995 |
| 12798 | Harwood Oil & Gas Inc | Greeley, CO 80631-8233 | Oil & Gas Operator | Feb 2025 |
| 12799 | Hasada Industrie | | Oil & Gas Operator | Jul 1995 |
| 12800 | Haskit, Kendall | Kyle, TX 78640 | Oil & Gas Operator | May 2025 |