| 12601 | Hall Farm Leasing, LLC | | Oil Operator | Dec 2012 |
| 12602 | Hall IVan & Assoc Inc | Berea, OH 44017 | Oil & Gas Operator | Dec 1997 |
| 12603 | Hall Oil & Gas | Coahoma, TX 79511 | Oil & Gas Operator | Feb 2026 |
| 12604 | Hall Oil And Gas LLC | Midland, TX 79707 | Oil & Gas Operator | Feb 2026 |
| 12605 | Hall Oil Company | Humboldt, KS 66748 | Oil Operator | Nov 2009 |
| 12606 | Hall Resources Corporation | Independence, MO 64057-2158 | Oil & Gas Operator | Jun 2016 |
| 12607 | Hall Richard A | | Oil Operator | Sep 1993 |
| 12608 | Hall Thomas E | Marietta, OH 45750 | Oil & Gas Operator | Dec 2021 |
| 12609 | Hall, D. Corporation | La Grange, TX 78945 | Oil & Gas Operator | Mar 2013 |
| 12610 | Hall, E. G., Oil Co. | Mexia, TX 76667 | Oil & Gas Operator | Feb 2026 |
| 12611 | Hall, J.J. Operating Co., Inc. | Lakewood, CO 80215 | Oil Operator | Jan 2005 |
| 12612 | Hall, James H ( Trust) | | Gas Operator | Dec 2007 |
| 12613 | Hall, Michael Wayne | Toronto, KS 66777 | Oil Operator | Dec 2009 |
| 12614 | Hall-Hargraves, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 12615 | Hall-Houston Expl. II, L.P. | Houston, TX 77027 | Oil & Gas Operator | Feb 2026 |
| 12616 | Hall-Houston Expl. III, L.P. | Houston, TX 77027 | Oil & Gas Operator | Jul 2013 |
| 12617 | Hall-Houston Oil Company | Houston, TX 77002 | Oil & Gas Operator | Oct 2002 |
| 12618 | Hallador Petroleum Company | | Oil & Gas Operator | Feb 1992 |
| 12619 | Hallador Petroleum LLP | Denver, CO 80264 | Oil & Gas Operator | Feb 2019 |
| 12620 | Hallar Enterprises, Inc. | | Oil Operator | Oct 2007 |
| 12621 | Hallco Petroleum Inc | Oklahoma City, OK 73106-5224 | Oil Operator | Aug 2018 |
| 12622 | Halliburton Oil | | Oil & Gas Operator | Sep 2008 |
| 12623 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 12624 | Halliburton Operating Company | Plano, TX 75093 | Oil & Gas Operator | Feb 2026 |
| 12625 | Hallmark Oil And Gas Co., Inc. | | Oil & Gas Operator | Dec 2024 |
| 12626 | Hallmark Resources, Inc | Stilwell, OK 74960-0312 | Oil & Gas Operator | Sep 2020 |
| 12627 | Hallum Construction Inc | Seminole, OK 74868-2427 | Oil & Gas Operator | Sep 2014 |
| 12628 | Hallwell Gas & Oil Co. | | Oil & Gas Operator | Sep 1985 |
| 12629 | Hallwood Energy Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2005 |
| 12630 | Hallwood Petrole | | Oil & Gas Operator | Apr 1999 |
| 12631 | Hallwood Petroleum | Denver, CO 80237 | Oil & Gas Operator | Dec 1997 |
| 12632 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 12633 | Hallwood Petroleum, LLC | Dallas, TX 75219 | Oil & Gas Operator | Jan 2010 |
| 12634 | Halo Energy L.L.C. | Kilgore, TX 75662 | Oil Operator | Feb 2026 |
| 12635 | Halter Ralph P | Robertsville, OH 44670 | Oil Operator | Dec 1999 |
| 12636 | Halvey Energy Co. | Midland, TX 79702 | Oil & Gas Operator | Oct 2004 |
| 12637 | Halvey Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 12638 | Ham Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Feb 2000 |
| 12639 | Ham Oil Company, LLC | | Oil Operator | Sep 2022 |
| 12640 | Hamblin Ralph Inc | MT Vernon, OH 43050 | Oil & Gas Operator | Dec 1991 |
| 12641 | Hamby Oil LLC | Ellinwood, KS 67526 | Oil Operator | May 2013 |
| 12642 | Hamil Oil & Gas LLC | Kingfisher, OK 73750-6500 | Oil & Gas Operator | Nov 2025 |
| 12643 | Hamill Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1999 |
| 12644 | Hamill, Claud B. Estate Of | Houston, TX 77002 | Oil & Gas Operator | Nov 1995 |
| 12645 | Hamill, Flora Oil Co. | Levelland, TX 79336 | Oil & Gas Operator | Feb 2026 |
| 12646 | Hamilton B J | Ada, OK 74820-9404 | Oil & Gas Operator | Sep 1999 |
| 12647 | Hamilton Brother | | Gas Operator | May 1993 |
| 12648 | Hamilton Brothers | Plainview, TX 79073 | Oil & Gas Operator | Mar 2008 |
| 12649 | Hamilton Brothers Oil Co. | Houston, TX 77057 | Oil & Gas Operator | Mar 2015 |
| 12650 | Hamilton Gas Co., Inc. | | Gas Operator | Mar 1999 |
| 12651 | Hamilton K M Oil & Gas Co | Ada, OK 74820 | Oil Operator | Jan 2013 |
| 12652 | Hamilton Leonard O | Marietta, OH 45750 | Oil & Gas Operator | Dec 2024 |
| 12653 | Hamilton, Clay | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Feb 2026 |
| 12654 | Hamilton, Eddy R. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 12655 | Hamilton, J. R. | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Feb 2026 |
| 12656 | Hamilton, John M. | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2001 |
| 12657 | Hamilton, W. B., Estate | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2004 |
| 12658 | Hamilton-Tedford Oper. Co., LLC | Wichita Falls, TX 76301 | Oil Operator | May 2007 |
| 12659 | Hamlin Jim | Dewey, OK 74029 | Oil & Gas Operator | Aug 1999 |
| 12660 | Hamlin Oil Opera | | Oil Operator | May 1988 |
| 12661 | Hamm N R Contrac | | Oil & Gas Operator | Jun 1989 |
| 12662 | Hamm, Richard | Monahans, TX 79756 | Oil & Gas Operator | Mar 1994 |
| 12663 | Hamm, Richard Inc. | Monahans, TX 79756 | Oil & Gas Operator | Feb 2026 |
| 12664 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Feb 2026 |
| 12665 | Hamman, Blake | Graham, TX 76450 | Oil & Gas Operator | Jul 2020 |
| 12666 | Hammer Maclean Etal | Leon, KS 67074 | Oil Operator | Dec 2019 |
| 12667 | Hammer Oil Compa | | Oil Operator | Oct 1985 |
| 12668 | Hammer Oil Company | Post, TX 79356 | Oil & Gas Operator | Jun 2002 |
| 12669 | Hammer Oil Properties Inc | Enid, OK 73706-0144 | Oil & Gas Operator | Oct 2017 |
| 12670 | Hammer Ranch | Elmore City, OK 73433 | Oil & Gas Operator | Jan 2023 |
| 12671 | Hammerschmidt Wi | | Oil Operator | Sep 1991 |
| 12672 | Hammerschmidt, Leo | Plainville, KS 67663 | Oil Operator | Aug 2000 |
| 12673 | Hammerschmidt, William E | Plainville, KS 67663 | Oil Operator | Sep 2025 |
| 12674 | Hammersmith, Beverly | West Falls, NY 14170 | Gas Operator | Dec 2024 |
| 12675 | Hammon Properties | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 1996 |
| 12676 | Hammond Production Company | Bristow, OK 74010 | Oil & Gas Operator | Nov 1998 |
| 12677 | Hammond Valley Colony, Inc. | Harlowton, MT 59036 | Gas Operator | Nov 2025 |
| 12678 | Hamon Jake L | Dallas, TX 75201-3902 | Oil & Gas Operator | Nov 1997 |
| 12679 | Hamon Oil Company | | Oil & Gas Operator | Aug 1985 |
| 12680 | Hamon Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2011 |
| 12681 | Hamp Oil | Ponca City, OK 74604 | Oil & Gas Operator | Sep 2002 |
| 12682 | Hamp Oil - Pace | | Oil & Gas Operator | Apr 1994 |
| 12683 | Hampton Corporation (The) | Norman, OK 73069-5910 | Oil Operator | Jun 2016 |
| 12684 | Hampton Oil & Gas | Early, TX 76802 | Gas Operator | Feb 2012 |
| 12685 | Hampton Resources Corporation | Houston, TX 77010 | Oil & Gas Operator | Mar 1996 |
| 12686 | Hampton, Jno. W. & Son | Wichita Falls, TX 76302 | Oil & Gas Operator | Nov 1998 |
| 12687 | Hanaco Operating | Holliday, TX 76366 | Oil Operator | Mar 2008 |
| 12688 | Hanaco, LLC | Holliday, TX 76366 | Oil Operator | Dec 2017 |
| 12689 | Hanagan Petroleum Corp | Roswell, NM 88201 | Oil & Gas Operator | Sep 1999 |
| 12690 | Hancock Leon | Kingston, OK 73439-9618 | Oil Operator | Dec 2014 |
| 12691 | Hancock, Burton W | Morrison, CO 80465 | Oil & Gas Operator | Dec 2017 |
| 12692 | Hand Oil Co. | Chanute, KS 66720 | Oil Operator | Nov 2000 |
| 12693 | Handy, Daniel G. | East Aurora, NY 14052 | Gas Operator | Dec 2024 |
| 12694 | Hane Operating, Inc. | Santa Anna, TX 76878 | Oil & Gas Operator | Sep 2005 |
| 12695 | Hanger Oil, L.L.C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 12696 | Hank Oil & Gas, Inc. | Houston, TX 77056 | Oil & Gas Operator | Oct 2023 |
| 12697 | Hankamer, Curtis Corporation,The | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |
| 12698 | Hankey Oil Company | Houston, TX 77027 | Oil & Gas Operator | Feb 2010 |
| 12699 | Hankey Operating, Inc. | Houston, TX 77027 | Oil & Gas Operator | Mar 2016 |
| 12700 | Hanks, Christopher Glenn | Gainesville, TX 76240 | Oil & Gas Operator | Feb 2026 |