| 12601 | Hardy Salt Co. | | Oil & Gas Operator | Apr 1986 |
| 12602 | Hargis Exploration & Prod., Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Jul 1996 |
| 12603 | Hargraves Daughters | | Oil Operator | Mar 1992 |
| 12604 | Hargraves Elston | Ponca City, OK 74604 | Oil & Gas Operator | Jul 2003 |
| 12605 | Hargraves Production, LLC | | Oil Operator | Jan 2025 |
| 12606 | Hargus Curtis | Macomb, OK 74852-8508 | Oil Operator | May 2017 |
| 12607 | Hargus Irrevocable Trust | Tecumseh, OK 74873-0590 | Oil Operator | Apr 2014 |
| 12608 | Haring Energy Company | Tuleta, TX 78162 | Oil & Gas Operator | Mar 2003 |
| 12609 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 12610 | Harken Southwest Corp | Dallas, TX 752612007 | Oil & Gas Operator | Feb 2001 |
| 12611 | Harkey Energy Inc. | Odessa, TX 79762 | Oil & Gas Operator | Feb 2020 |
| 12612 | Harkins & Co. | | Oil & Gas Operator | Oct 1986 |
| 12613 | Harkins And Co., Et Al | | Oil & Gas Operator | Dec 1980 |
| 12614 | Harleton Oil & Gas Inc. | Tyler, TX 75710 | Oil & Gas Operator | Mar 2026 |
| 12615 | Harley Drilling & Producing LTD | Burbank, OH 44214 | Oil & Gas Operator | Dec 2024 |
| 12616 | Harlo Oil Compan | | Oil Operator | Dec 1994 |
| 12617 | Harlow Corporation, The | Amarillo, TX 79101 | Oil & Gas Operator | Apr 2014 |
| 12618 | Harlow Enterprises LLC | Artesia, NM 88210 | Oil & Gas Operator | Dec 2025 |
| 12619 | Harman Operating Company, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2007 |
| 12620 | Harmel And Shawver Oil LLC | Wichita Falls, TX 76310 | Oil Operator | Mar 2026 |
| 12621 | Harmon O G LLC | Graysville, OH 45734 | Oil & Gas Operator | Dec 2024 |
| 12622 | Harmon, C. E. Oil, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2019 |
| 12623 | Harmonia Petroleum Corporation | Missouri City, TX 77459 | Oil & Gas Operator | May 2017 |
| 12624 | Harmons Well Service | Graysville, OH 45734 | Oil & Gas Operator | Dec 2019 |
| 12625 | Harmony Drilling Company, Inc. | Denver, CO 80222 | Oil & Gas Operator | Nov 2016 |
| 12626 | Harmony Exploration, Inc. | College Sta, TX 77842 | Oil & Gas Operator | Mar 2026 |
| 12627 | Harmony Oil & Gas Co Inc | Reno, NV 89509 | Oil Operator | Dec 1994 |
| 12628 | Harmony Oil LLC | Cushing, OK 74023 | Oil Operator | Dec 2025 |
| 12629 | Harmony Producing Co Inc | | Oil & Gas Operator | Dec 1995 |
| 12630 | Harms Petroleum | | Oil & Gas Operator | May 1991 |
| 12631 | Harms, H. Allan Petroleum Co., Inc. | Great Bend, KS 67530 | Oil Operator | Apr 1999 |
| 12632 | Harms, Vance N. | Talpa, TX 76882 | Oil & Gas Operator | Mar 2016 |
| 12633 | Harnetty Francis Dba Harnetty Oil & Gas | Junction City, OH 43748 | Oil & Gas Operator | Dec 2019 |
| 12634 | Harold Enterprises Inc | Kellyville, OK 74039-0441 | Oil & Gas Operator | Jan 2018 |
| 12635 | Harold G Raper Family Trust | Mansfield, TX 76063-1667 | Oil Operator | May 2023 |
| 12636 | Harold H. Hollenshead | | Oil & Gas Operator | May 2002 |
| 12637 | Harold M Root Foundation | | Oil Operator | Dec 2025 |
| 12638 | Harold R Elkin | Punxsutawney, PA 15767-7922 | Oil & Gas Operator | Dec 2016 |
| 12639 | Harp Peggy A | Seminole, OK 74868-2284 | Oil & Gas Operator | Mar 2024 |
| 12640 | Harp, Stephen J. | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 12641 | Harpel John P Jr | FT. Collins, CO 80525 | Oil & Gas Operator | May 1998 |
| 12642 | Harper Crosby Holdings, LLC | Weston, WV 26452 | Oil & Gas Operator | Dec 2025 |
| 12643 | Harper Hefte, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Mar 2026 |
| 12644 | Harper Joe Howard Dba J H Field Service | Nowata, OK 74048-9704 | Oil & Gas Operator | Dec 2025 |
| 12645 | Harper Oil And Gas, LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 12646 | Harper Oil Co. | Denver, CO 80217 | Oil & Gas Operator | Sep 2025 |
| 12647 | Harper Production, LLC | Spearman, TX 79081 | Oil & Gas Operator | Mar 2026 |
| 12648 | Harper, Clint | Woodson, TX 76491 | Oil & Gas Operator | Mar 2026 |
| 12649 | Harper, Mr. William | Clyde, NY 14433 | Gas Operator | Dec 2023 |
| 12650 | Harper, Wayne | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 12651 | Harper, William E. | Woodson, TX 76491 | Oil & Gas Operator | Jul 2016 |
| 12652 | Harrell Oil Company LLC | Ardmore, OK 73402 | Oil Operator | Jan 2025 |
| 12653 | Harrell Operating Inc | Graham, TX 76450 | Oil & Gas Operator | Sep 2005 |
| 12654 | Harrell Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Jun 2008 |
| 12655 | Harrell Petroleum Inc | Oklahoma City, OK 73102-7201 | Oil & Gas Operator | Oct 2017 |
| 12656 | Harrell Verlan W | Oklahoma City, OK 73102-7201 | Oil & Gas Operator | Nov 1999 |
| 12657 | Harrell, Charles | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 12658 | Harrier Holdings, LTD. | Burnet, TX 78611 | Oil Operator | Mar 2026 |
| 12659 | Harrigan Energy Partners, Inc. | Houston, TX 77058 | Oil & Gas Operator | Sep 2010 |
| 12660 | Harrigan Operating, LLC | Houston, TX 77258 | Oil & Gas Operator | Apr 2020 |
| 12661 | Harrington Billy B | Depew, OK 74028-3495 | Oil & Gas Operator | May 2006 |
| 12662 | Harrington Oil Inc. | | Oil & Gas Operator | Apr 1978 |
| 12663 | Harrington Orville | Dewey, OK 74029 | Oil Operator | Dec 2025 |
| 12664 | Harrington SR Tommy W | Drumright, OK 74030-5778 | Oil Operator | May 2015 |
| 12665 | Harris & Payne-Randel Drilling | | Oil & Gas Operator | Dec 1989 |
| 12666 | Harris & Walton | Midland, TX 79702 | Oil & Gas Operator | Feb 2004 |
| 12667 | Harris B D | Norman, OK 73071-4802 | Oil & Gas Operator | Apr 2014 |
| 12668 | Harris Energy Partners Op, LLC | Fort Worth, TX 76116 | Oil Operator | Mar 2026 |
| 12669 | Harris Energy Services, LLC | Dallas, TX 75201 | Oil & Gas Operator | Mar 2026 |
| 12670 | Harris Engineering Co | Dallas, TX 75248 | Oil & Gas Operator | Dec 1996 |
| 12671 | Harris Les And Canonie Tony SR | | Gas Operator | Jan 1989 |
| 12672 | Harris Mildred C | Tulsa, OK 74120 | Oil & Gas Operator | Dec 2025 |
| 12673 | Harris Minerals Corp (The) | Oklahoma City, OK 73162-1045 | Oil & Gas Operator | Dec 2025 |
| 12674 | Harris Oil & Gas | | Oil & Gas Operator | Jul 1995 |
| 12675 | Harris Oil & Gas Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2016 |
| 12676 | Harris Olin | Okmulgee, OK 74447-8508 | Oil Operator | Feb 2012 |
| 12677 | Harris, David | Toronto, KS 66777 | Oil Operator | Sep 2025 |
| 12678 | Harris, Jake, Trustee | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 2001 |
| 12679 | Harris, Sam E. | Albany, TX 76430 | Oil & Gas Operator | Aug 2003 |
| 12680 | Harris, William H. Jr. | Le Roy, NY 14482 | Gas Operator | Dec 2024 |
| 12681 | Harrison & Lee | | Oil Operator | Sep 1996 |
| 12682 | Harrison Drilling Co | | Oil & Gas Operator | Mar 1981 |
| 12683 | Harrison Energy | Tippecanoe, OH 44699 | Oil & Gas Operator | Dec 2000 |
| 12684 | Harrison Interests, LTD. | Houston, TX 77002 | Oil & Gas Operator | Mar 2026 |
| 12685 | Harrison Oil & Gas Inc | Houston, TX 77019 | Oil & Gas Operator | Dec 2025 |
| 12686 | Harrison, Dan J III&Bruce F Est | Houston, TX 77002 | Oil & Gas Operator | Mar 2026 |
| 12687 | Harrison, Dan J. III&Bruce F. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 12688 | Harrison, Mark V. | Madison, KS 66860 | Oil Operator | Jul 1995 |
| 12689 | Harrison, Sam G. Oil, Inc. | Houston, TX 77019 | Oil & Gas Operator | Nov 2019 |
| 12690 | Harrison, Thomas D | Park City, UT 84060-7307 | Gas Operator | Dec 1998 |
| 12691 | Harrison-Wright Oil Company LLC | Tulsa, OK 74133-7035 | Oil & Gas Operator | Jan 2026 |
| 12692 | Harrod Leasing | Edmond, OK 73034 | Oil & Gas Operator | Dec 2025 |
| 12693 | Harry Feder | | Oil & Gas Operator | Dec 1999 |
| 12694 | Harry L. Neeb | | Oil Operator | May 1985 |
| 12695 | Harsh International Inc | | Oil & Gas Operator | Dec 2013 |
| 12696 | Hart & McFarland | Vivian, LA 71082 | Oil & Gas Operator | Mar 2026 |
| 12697 | Hart David | Chickasha, OK 73018-7756 | Oil & Gas Operator | Mar 2015 |
| 12698 | Hart Energies, LLC | Tulsa, OK 74133 | Oil & Gas Operator | Dec 2016 |
| 12699 | Hart Energy LLC | | Oil Operator | Jan 2026 |
| 12700 | Hart Oil & Gas Inc | Houston, TX 77024 | Oil & Gas Operator | Jan 2017 |