| 12501 | Harvey A B | Seminole, OK 74868-1724 | Oil Operator | Mar 2015 |
| 12502 | Harvey Brothers Oil & Gas | Corpus Chrsti, TX 78408 | Oil & Gas Operator | Jul 2004 |
| 12503 | Harvey Broyles | | Oil & Gas Operator | May 2012 |
| 12504 | Harvey Broyles & Munoco Co. | | Oil & Gas Operator | Jan 2002 |
| 12505 | Harvey Broyles, Et Al | | Gas Operator | Nov 1985 |
| 12506 | Harvey E Yates Company | Roswell, NM 88202 | Oil & Gas Operator | Feb 2015 |
| 12507 | Harvey, James W. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2008 |
| 12508 | Harvey, Mike W. Oil & Gas | Corpus Chrsti, TX 78408 | Oil & Gas Operator | Aug 2003 |
| 12509 | Harvey, Robert E., Jr. | Nixon, TX 78140 | Oil & Gas Operator | Oct 2003 |
| 12510 | Harvick Oil Co. | Albany, TX 76430 | Oil & Gas Operator | Feb 2009 |
| 12511 | Harvick, George R. | Albany, TX 76430 | Oil & Gas Operator | Aug 2026 |
| 12512 | Harwell Enterprises Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Jan 2005 |
| 12513 | Harwood Exploration, Inc. | Corpus Christ, TX 78401 | Oil & Gas Operator | Aug 1995 |
| 12514 | Harwood Oil & Gas Inc | Greeley, CO 80631-8233 | Oil & Gas Operator | Apr 2026 |
| 12515 | Hasada Industrie | | Oil & Gas Operator | Jul 1995 |
| 12516 | Haskit, Kendall | Kyle, TX 78640 | Oil & Gas Operator | Aug 2026 |
| 12517 | Hassie Hunt Expl. Co. | | Oil & Gas Operator | Aug 2008 |
| 12518 | Hasso Energy LLC | | Oil & Gas Operator | Feb 2026 |
| 12519 | Hastings, J. W. Oil Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2010 |
| 12520 | Hat Creek Cattle Company, A General Partnership | Paola, KS 66071 | Oil Operator | Aug 2016 |
| 12521 | Hat Creek Energy LLC | Denver, CO 80209 | Oil & Gas Operator | Jun 2019 |
| 12522 | Hat Oil & Gas, Inc. | Slaton, TX 79364 | Oil & Gas Operator | Feb 2002 |
| 12523 | Hat Production LLC | Mound City, KS 66056 | Oil Operator | Apr 2026 |
| 12524 | Hat-Top Production Co | Duncan, OK 73533 | Oil Operator | Apr 2011 |
| 12525 | Hatch, Jeffrey And Chelsea | Bemus Point, NY 14712 | Gas Operator | Dec 2025 |
| 12526 | Hatcher, Ray | Burkburnett, TX 76354 | Oil & Gas Operator | Jun 2002 |
| 12527 | Hatco Productions LTD | North Augusta, SC 29860 | Oil Operator | Dec 2025 |
| 12528 | Hathaway Company | | Oil & Gas Operator | Dec 2025 |
| 12529 | Hathaway LLC | | Oil & Gas Operator | Jun 2026 |
| 12530 | Hatler Oil Company, Inc. | Graham, TX 76450 | Oil & Gas Operator | Sep 2000 |
| 12531 | Hatley Delbert Jr Dba DH Enterprises | Oklahoma City, OK 73129 | Oil & Gas Operator | Apr 2026 |
| 12532 | Haug Lawrence | Kimball, NE 69145 | Oil & Gas Operator | Jul 2007 |
| 12533 | Haught Energy Corporation | Parkersburg, WV 26101 | Oil & Gas Operator | Dec 2021 |
| 12534 | Haught Harold | Hominy, OK 74035 | Oil Operator | Feb 2012 |
| 12535 | Haught, Glenn L. & Sons | | Oil & Gas Operator | Dec 1997 |
| 12536 | Haught, Inc. | Smithville, WV 26178 | Oil & Gas Operator | Nov 2021 |
| 12537 | Haul-Pac, Inc. | Hiawatha, KS 66434 | Oil Operator | Dec 2025 |
| 12538 | Haussler Farms Inc. | | Oil Operator | Dec 1992 |
| 12539 | Haven Oil & Gas | Hutchinson, KS 67504 | Oil & Gas Operator | Mar 2009 |
| 12540 | Havens Oil Company | Early, TX 76803 | Oil & Gas Operator | Dec 2025 |
| 12541 | Haverkamp, Floyd | Muenster, TX 76252 | Oil & Gas Operator | Oct 2001 |
| 12542 | Havins Energy | Burkburnett, TX 76354 | Oil & Gas Operator | May 2006 |
| 12543 | Havoco Inc | Newcastle, WY 82701 | Oil & Gas Operator | Aug 2005 |
| 12544 | Haw Corporation | | Oil Operator | Dec 1979 |
| 12545 | Hawk Exploration And Production | Corpus Christ, TX 78412 | Oil & Gas Operator | Oct 1995 |
| 12546 | Hawk Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Aug 2003 |
| 12547 | Hawk Petroleum, L L C | San Diego, TX 78384 | Oil & Gas Operator | Aug 2026 |
| 12548 | Hawk Well Service | Borger, TX 79007 | Oil & Gas Operator | Aug 2026 |
| 12549 | Hawk, Lisa | Fredonia, NY 14063 | Gas Operator | Dec 2025 |
| 12550 | Hawk-Hill Operating Company, LLC | Plano, TX 75093 | Oil & Gas Operator | Jun 2009 |
| 12551 | Hawkbend LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2026 |
| 12552 | Hawke Inc | Barbertib, OH 44203 | Oil & Gas Operator | Dec 2025 |
| 12553 | Hawkeye Drilling Co. | Waskom, TX 75692 | Oil & Gas Operator | Feb 2023 |
| 12554 | Hawkeye Oil | | Oil & Gas Operator | Jun 2007 |
| 12555 | Hawkeye Oil & Gas, Inc. | | Gas Operator | Jun 1995 |
| 12556 | Hawkeye Transmission Company | Dallas, TX 75244 | Oil & Gas Operator | Jun 2000 |
| 12557 | Hawkins & Hawkins | Council Hill, OK 74428 | Oil & Gas Operator | Jul 1996 |
| 12558 | Hawkins & Son Inc | Boynton, OK 74422 | Oil & Gas Operator | Aug 2019 |
| 12559 | Hawkins Energy Corporation | Austin, TX 78711 | Oil & Gas Operator | Apr 1997 |
| 12560 | Hawkins Oil & Ga | | Oil & Gas Operator | Jun 1995 |
| 12561 | Hawkins Oil & Gas Company | Richardson, TX 75080 | Oil & Gas Operator | Aug 2026 |
| 12562 | Hawkins Oil & Gas, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 12563 | Hawkins Oil Of Michigan Inc | | Oil & Gas Operator | Aug 2003 |
| 12564 | Hawkins Oil, L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2026 |
| 12565 | Hawkins, B. O. | Aspermont, TX 79502 | Oil & Gas Operator | Aug 2026 |
| 12566 | Hawkins, Blanche | Clay City, KY 40312 | Oil Operator | Dec 2023 |
| 12567 | Hawkins, G. A. | Graham, TX 76450 | Oil & Gas Operator | Dec 2013 |
| 12568 | Hawkins, James F. | Tulsa, OK 74103 | Oil Operator | Dec 2019 |
| 12569 | Hawkins, Robert S. | Kevin, MT 59454 | Oil Operator | Jun 2018 |
| 12570 | Hawks Company | Casper, WY 82602 | Oil & Gas Operator | Apr 2007 |
| 12571 | Hawks Industries Inc | Casper, WY 82601 | Oil & Gas Operator | Jun 1993 |
| 12572 | Hawkwood Energy Operating, LLC | Houston, TX 77224 | Oil & Gas Operator | Apr 2022 |
| 12573 | Hawley & Desimon | Conrad, MT 59425 | Oil Operator | May 2026 |
| 12574 | Hawley Hydrocarbons, Merrill&Carol Hawley Dba | Great Falls, MT 59405 | Oil Operator | May 2026 |
| 12575 | Hawley Oil Company | Great Falls, MT 59405-5156 | Oil Operator | Dec 2025 |
| 12576 | Hawn Bros. & Venus Oil Co. | Corpus Christ, TX 78401 | Oil & Gas Operator | Aug 1995 |
| 12577 | Hawn Brothers | Corpus Christ, TX 78401 | Oil & Gas Operator | Apr 2003 |
| 12578 | Hawn Brothers Company | Corpus Christ, TX 78401 | Oil & Gas Operator | Jan 2003 |
| 12579 | Hawn Petroleum I | | Oil Operator | Jun 1989 |
| 12580 | Hawthorn Energy Partners, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Aug 2026 |
| 12581 | Hawthorne Carl A | Mounds, OK 74047-4936 | Oil & Gas Operator | Apr 2015 |
| 12582 | Hawthorne Oil And Gas Corp. | Houston, TX 77227 | Oil & Gas Operator | Sep 1993 |
| 12583 | Hawthorne-Tipco | | Oil & Gas Operator | Oct 1978 |
| 12584 | Hay Creek Investments, L.L.C. | Santa Anna, TX 76878 | Oil Operator | Jul 2018 |
| 12585 | Hay Exploration, Inc | Ashland, KY 41102 | Oil & Gas Operator | Dec 2024 |
| 12586 | Hay Leonard | Rock Springs, WY 82901 | Oil & Gas Operator | Sep 1994 |
| 12587 | Hayabusa Energy USA, LLC | Pampa, TX 79065 | Oil & Gas Operator | Aug 2026 |
| 12588 | Hayden Harper Energy Ka, LLC | Charlotte, NC 28203-4173 | Oil & Gas Operator | Dec 2021 |
| 12589 | Hayden Operating | | Oil & Gas Operator | Apr 2026 |
| 12590 | Hayden, Mabel | Barkerton, KY 42717 | Oil Operator | Dec 2015 |
| 12591 | Haydens Oil And Gas LLC | Dover, OK 73734 | Oil & Gas Operator | Apr 2026 |
| 12592 | Hayes & Assoc Inc | | Oil & Gas Operator | Oct 1991 |
| 12593 | Hayes & Hudson | Bartlesville, OK 74003 | Oil & Gas Operator | Apr 2026 |
| 12594 | Hayes James Brent | Guysville, OH 45735-9496 | Oil & Gas Operator | Dec 2025 |
| 12595 | Hayes Oil & Gas Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2003 |
| 12596 | Hayes Oil & Gas LLC | Attica, KS 67009 | Oil & Gas Operator | Apr 2026 |
| 12597 | Hayes, Marshall A. III | Chilton, TX 76632 | Oil & Gas Operator | Aug 2026 |
| 12598 | Haylan Oil Company | Midland, TX 79710 | Oil & Gas Operator | Jan 2000 |
| 12599 | Haylandia, LLC | Bloomfield, NY 14469 | Gas Operator | Dec 2025 |
| 12600 | Haynes & Shirley Production Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Aug 2026 |