| 12401 | Harvey, Mike W. Oil & Gas | Corpus Chrsti, TX 78408 | Oil & Gas Operator | Aug 2003 |
| 12402 | Harvey, Robert E., Jr. | Nixon, TX 78140 | Oil & Gas Operator | Oct 2003 |
| 12403 | Harvick Oil Co. | Albany, TX 76430 | Oil & Gas Operator | Feb 2009 |
| 12404 | Harvick, George R. | Albany, TX 76430 | Oil & Gas Operator | Jun 2026 |
| 12405 | Harwell Enterprises Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Jan 2005 |
| 12406 | Harwood Exploration, Inc. | Corpus Christ, TX 78401 | Oil & Gas Operator | Aug 1995 |
| 12407 | Harwood Oil & Gas Inc | Greeley, CO 80631-8233 | Oil & Gas Operator | Mar 2026 |
| 12408 | Hasada Industrie | | Oil & Gas Operator | Jul 1995 |
| 12409 | Haskit, Kendall | Kyle, TX 78640 | Oil & Gas Operator | Jun 2026 |
| 12410 | Hassie Hunt Expl. Co. | | Oil & Gas Operator | Aug 2008 |
| 12411 | Hasso Energy LLC | | Oil & Gas Operator | Feb 2026 |
| 12412 | Hastings, J. W. Oil Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2010 |
| 12413 | Hat Creek Cattle Company, A General Partnership | Paola, KS 66071 | Oil Operator | Aug 2016 |
| 12414 | Hat Creek Energy LLC | Denver, CO 80209 | Oil & Gas Operator | Jun 2019 |
| 12415 | Hat Oil & Gas, Inc. | Slaton, TX 79364 | Oil & Gas Operator | Feb 2002 |
| 12416 | Hat Production LLC | Mound City, KS 66056 | Oil Operator | Jan 2026 |
| 12417 | Hat-Top Production Co | Duncan, OK 73533 | Oil Operator | Apr 2011 |
| 12418 | Hatch, Jeffrey And Chelsea | Bemus Point, NY 14712 | Gas Operator | Dec 2024 |
| 12419 | Hatcher, Ray | Burkburnett, TX 76354 | Oil & Gas Operator | Jun 2002 |
| 12420 | Hatco Productions LTD | North Augusta, SC 29860 | Oil Operator | Dec 2025 |
| 12421 | Hathaway Company | | Oil & Gas Operator | Dec 2025 |
| 12422 | Hathaway LLC | | Oil & Gas Operator | Feb 2026 |
| 12423 | Hatler Oil Company, Inc. | Graham, TX 76450 | Oil & Gas Operator | Sep 2000 |
| 12424 | Hatley Delbert Jr Dba DH Enterprises | Oklahoma City, OK 73129 | Oil & Gas Operator | Apr 2026 |
| 12425 | Haug Lawrence | Kimball, NE 69145 | Oil & Gas Operator | Jul 2007 |
| 12426 | Haught Energy Corporation | Parkersburg, WV 26101 | Oil & Gas Operator | Dec 2021 |
| 12427 | Haught Harold | Hominy, OK 74035 | Oil Operator | Feb 2012 |
| 12428 | Haught, Glenn L. & Sons | | Oil & Gas Operator | Dec 1997 |
| 12429 | Haught, Inc. | Smithville, WV 26178 | Oil & Gas Operator | Nov 2021 |
| 12430 | Haul-Pac, Inc. | Hiawatha, KS 66434 | Oil Operator | Dec 2025 |
| 12431 | Haussler Farms Inc. | | Oil Operator | Dec 1992 |
| 12432 | Haven Oil & Gas | Hutchinson, KS 67504 | Oil & Gas Operator | Mar 2009 |
| 12433 | Havens Oil Company | Early, TX 76803 | Oil & Gas Operator | Dec 2025 |
| 12434 | Haverkamp, Floyd | Muenster, TX 76252 | Oil & Gas Operator | Oct 2001 |
| 12435 | Havins Energy | Burkburnett, TX 76354 | Oil & Gas Operator | May 2006 |
| 12436 | Havoco Inc | Newcastle, WY 82701 | Oil & Gas Operator | Aug 2005 |
| 12437 | Haw Corporation | | Oil Operator | Dec 1979 |
| 12438 | Hawk Exploration And Production | Corpus Christ, TX 78412 | Oil & Gas Operator | Oct 1995 |
| 12439 | Hawk Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Aug 2003 |
| 12440 | Hawk Petroleum, L L C | San Diego, TX 78384 | Oil & Gas Operator | Jun 2026 |
| 12441 | Hawk Well Service | Borger, TX 79007 | Oil & Gas Operator | Jun 2026 |
| 12442 | Hawk, Lisa | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 12443 | Hawk-Hill Operating Company, LLC | Plano, TX 75093 | Oil & Gas Operator | Jun 2009 |
| 12444 | Hawkbend LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2026 |
| 12445 | Hawke Inc | Barbertib, OH 44203 | Oil & Gas Operator | Dec 2025 |
| 12446 | Hawkeye Drilling Co. | Waskom, TX 75692 | Oil & Gas Operator | Feb 2023 |
| 12447 | Hawkeye Oil | | Oil & Gas Operator | Jun 2007 |
| 12448 | Hawkeye Oil & Gas, Inc. | | Gas Operator | Jun 1995 |
| 12449 | Hawkeye Transmission Company | Dallas, TX 75244 | Oil & Gas Operator | Jun 2000 |
| 12450 | Hawkins & Hawkins | Council Hill, OK 74428 | Oil & Gas Operator | Jul 1996 |
| 12451 | Hawkins & Son Inc | Boynton, OK 74422 | Oil & Gas Operator | Aug 2019 |
| 12452 | Hawkins Energy Corporation | Austin, TX 78711 | Oil & Gas Operator | Apr 1997 |
| 12453 | Hawkins Oil & Ga | | Oil & Gas Operator | Jun 1995 |
| 12454 | Hawkins Oil & Gas Company | Richardson, TX 75080 | Oil & Gas Operator | Jun 2026 |
| 12455 | Hawkins Oil & Gas, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 12456 | Hawkins Oil Of Michigan Inc | | Oil & Gas Operator | Aug 2003 |
| 12457 | Hawkins Oil, L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 12458 | Hawkins, B. O. | Aspermont, TX 79502 | Oil & Gas Operator | Jun 2026 |
| 12459 | Hawkins, Blanche | Clay City, KY 40312 | Oil Operator | Dec 2023 |
| 12460 | Hawkins, G. A. | Graham, TX 76450 | Oil & Gas Operator | Dec 2013 |
| 12461 | Hawkins, James F. | Tulsa, OK 74103 | Oil Operator | Dec 2019 |
| 12462 | Hawkins, Robert S. | Kevin, MT 59454 | Oil Operator | Jun 2018 |
| 12463 | Hawks Company | Casper, WY 82602 | Oil & Gas Operator | Apr 2007 |
| 12464 | Hawks Industries Inc | Casper, WY 82601 | Oil & Gas Operator | Jun 1993 |
| 12465 | Hawkwood Energy Operating, LLC | Houston, TX 77224 | Oil & Gas Operator | Apr 2022 |
| 12466 | Hawley & Desimon | Conrad, MT 59425 | Oil Operator | May 2026 |
| 12467 | Hawley Hydrocarbons, Merrill&Carol Hawley Dba | Great Falls, MT 59405 | Oil Operator | Apr 2026 |
| 12468 | Hawley Oil Company | Great Falls, MT 59405-5156 | Oil Operator | Dec 2025 |
| 12469 | Hawn Bros. & Venus Oil Co. | Corpus Christ, TX 78401 | Oil & Gas Operator | Aug 1995 |
| 12470 | Hawn Brothers | Corpus Christ, TX 78401 | Oil & Gas Operator | Apr 2003 |
| 12471 | Hawn Brothers Company | Corpus Christ, TX 78401 | Oil & Gas Operator | Jan 2003 |
| 12472 | Hawn Petroleum I | | Oil Operator | Jun 1989 |
| 12473 | Hawthorn Energy Partners, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Jun 2026 |
| 12474 | Hawthorne Carl A | Mounds, OK 74047-4936 | Oil & Gas Operator | Apr 2015 |
| 12475 | Hawthorne Oil And Gas Corp. | Houston, TX 77227 | Oil & Gas Operator | Sep 1993 |
| 12476 | Hawthorne-Tipco | | Oil & Gas Operator | Oct 1978 |
| 12477 | Hay Creek Investments, L.L.C. | Santa Anna, TX 76878 | Oil Operator | Jul 2018 |
| 12478 | Hay Exploration, Inc | Ashland, KY 41102 | Oil & Gas Operator | Dec 2024 |
| 12479 | Hay Leonard | Rock Springs, WY 82901 | Oil & Gas Operator | Sep 1994 |
| 12480 | Hayabusa Energy USA, LLC | Pampa, TX 79065 | Oil & Gas Operator | Jun 2026 |
| 12481 | Hayden Harper Energy Ka, LLC | Charlotte, NC 28203-4173 | Oil & Gas Operator | Dec 2021 |
| 12482 | Hayden Operating | | Oil & Gas Operator | Feb 2026 |
| 12483 | Hayden, Mabel | Barkerton, KY 42717 | Oil Operator | Dec 2015 |
| 12484 | Haydens Oil And Gas LLC | Dover, OK 73734 | Oil & Gas Operator | Mar 2026 |
| 12485 | Hayes & Assoc Inc | | Oil & Gas Operator | Oct 1991 |
| 12486 | Hayes & Hudson | Bartlesville, OK 74003 | Oil & Gas Operator | Apr 2026 |
| 12487 | Hayes James Brent | Guysville, OH 45735-9496 | Oil & Gas Operator | Dec 2025 |
| 12488 | Hayes Oil & Gas Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2003 |
| 12489 | Hayes Oil & Gas LLC | Attica, KS 67009 | Oil & Gas Operator | Feb 2026 |
| 12490 | Hayes, Marshall A. III | Chilton, TX 76632 | Oil & Gas Operator | Jun 2026 |
| 12491 | Haylan Oil Company | Midland, TX 79710 | Oil & Gas Operator | Jan 2000 |
| 12492 | Haylandia, LLC | Bloomfield, NY 14469 | Gas Operator | Dec 2024 |
| 12493 | Haynes & Shirley Production Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Jun 2026 |
| 12494 | Haynes Jim L & Betty L | Haskell, OK 74436-8803 | Oil & Gas Operator | Dec 2013 |
| 12495 | Haynes Production Company, Inc. | Brownwood, TX 76801 | Oil & Gas Operator | Dec 2006 |
| 12496 | Haynie Drilling Co. Inc. | Corsicana, TX 75151 | Oil & Gas Operator | Dec 2011 |
| 12497 | Haynie Energy Services LLC | Wortham, TX 76693 | Oil Operator | Jun 2026 |
| 12498 | Haynie Robert L | | Gas Operator | Jan 2004 |
| 12499 | Hays & Boydston | Graham, TX 76450 | Oil & Gas Operator | Mar 1994 |
| 12500 | Hays & Croker Partnership | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |