| 13401 | HPC Operating, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Mar 2008 |
| 13402 | Hpoc, LLC | Cuba, NM 87013 | Oil Operator | Oct 2025 |
| 13403 | HPPC, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 13404 | HR Energy LLC | Shelby, MT 59474 | Oil & Gas Operator | Apr 2026 |
| 13405 | HR McClure | | Gas Operator | Dec 2018 |
| 13406 | HR Petroleum | Corpus Christ, TX 78413 | Oil & Gas Operator | Apr 1998 |
| 13407 | HRB Oil | Houston, TX 77042 | Oil & Gas Operator | Oct 1998 |
| 13408 | HRB Operating Company, Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Aug 2026 |
| 13409 | Hrbacek Oil Corp. | La Grange, TX 78945 | Oil & Gas Operator | Feb 2004 |
| 13410 | Hrbek, R. L. | Merino, CO 80741 | Oil & Gas Operator | Jan 2024 |
| 13411 | HRC Inc | Hobbs, NM 88241 | Gas Operator | Jun 2017 |
| 13412 | HRC Operating, LLC | Denver, CO 80202 | Oil & Gas Operator | Nov 2017 |
| 13413 | HRC Production Co | Houston, TX 77024 | Oil & Gas Operator | Apr 2026 |
| 13414 | HRF Exploration & Production LLC | Gaylord, MI 49734-0160 | Gas Operator | Aug 2026 |
| 13415 | HRF Exploration & Production,Inc | Denver, CO 80237 | Oil & Gas Operator | Mar 2009 |
| 13416 | HRH Energy Group Incorporated | Carrollton, TX 75006 | Oil & Gas Operator | Nov 2009 |
| 13417 | HRL Oilfields In | | Oil Operator | Jun 1998 |
| 13418 | HRM Resources II, LLC | Denver, CO 80202 | Oil & Gas Operator | Mar 2026 |
| 13419 | HRM Resources III LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2022 |
| 13420 | HRM Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2015 |
| 13421 | Hronek, Kenneth | Caldwell, TX 77836 | Oil & Gas Operator | Aug 2026 |
| 13422 | Hrubetz Oil Co. | Dallas, TX 75225 | Oil Operator | Sep 1986 |
| 13423 | Hrubetz Operating Company | Dallas, TX 75225 | Oil & Gas Operator | Feb 1999 |
| 13424 | HS Resources | Tulsa, OK 74136 | Oil & Gas Operator | Aug 1997 |
| 13425 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Sep 2002 |
| 13426 | Hsumy Oil & Gas Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2007 |
| 13427 | HT2 Exploration LLC | The Woodlands, TX 77381-4198 | Oil Operator | Apr 2026 |
| 13428 | HTC Gas Company, LLC | Hindman, KY 41822 | Gas Operator | Dec 2023 |
| 13429 | Hub Oil Company | | Oil Operator | Jan 1990 |
| 13430 | Hub-Cap Oil Company | Arlington, TX 76016 | Oil & Gas Operator | Dec 2013 |
| 13431 | Hub-Hill Inc | San Antonio, TX 78230 | Oil Operator | Nov 1998 |
| 13432 | Hubbard Creek Coal Gas LLC | | Gas Operator | Jun 2026 |
| 13433 | Hubbard Operating | Ozona, TX 76943 | Gas Operator | Aug 2026 |
| 13434 | Hubbs III, LLC | | Oil & Gas Operator | Mar 2024 |
| 13435 | Hubcap Oil, LLC | Boerne, TX 78015 | Oil Operator | Aug 2026 |
| 13436 | Hubco Exploration Inc. | Houston, TX 77073 | Oil & Gas Operator | Sep 2002 |
| 13437 | Huber Energy L.P. | Houston, TX 77079 | Oil & Gas Operator | Feb 2007 |
| 13438 | Huber Energy Panhandle LP | Houston, TX 77079 | Oil & Gas Operator | Oct 2005 |
| 13439 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Aug 2026 |
| 13440 | Huber J M Corpor | | Oil & Gas Operator | Dec 1996 |
| 13441 | Huber Oil Company, A General Partnership | Madison, KS 66860 | Oil & Gas Operator | Feb 2026 |
| 13442 | Hubl/Harbin | | Oil Operator | Dec 1994 |
| 13443 | Huck Farms LLC | Stratford, OK 74872 | Oil & Gas Operator | Mar 2026 |
| 13444 | Hudgens Lester E | Bartlesville, OK 74006-0215 | Oil Operator | Mar 2015 |
| 13445 | Hudgens Operating Co., Inc. | Abilene, TX 79603 | Oil & Gas Operator | Jul 1995 |
| 13446 | Hudson Brothers Mining Co., Inc. | Cisco, TX 76437 | Oil & Gas Operator | Jun 1994 |
| 13447 | Hudson Brothers, Inc. | Hutchinson, KS 67501 | Oil & Gas Operator | Jun 2007 |
| 13448 | Hudson Energy LLC | | Oil Operator | Apr 2026 |
| 13449 | Hudson Group LLC | Casper, WY 82601 | Oil & Gas Operator | Jul 2025 |
| 13450 | Hudson Oil Company Of Texas | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 13451 | Hudson, Comer Oil & Gas | Cisco, TX 76437 | Oil & Gas Operator | Jan 2003 |
| 13452 | Huey Dean | | Oil Operator | Oct 2000 |
| 13453 | Hufco, Incorporated | | Oil & Gas Operator | Dec 2020 |
| 13454 | Huff Minerals, LTD. | Amarillo, TX 79101 | Gas Operator | Aug 2026 |
| 13455 | Huff, Jack | Midland, TX 79710 | Oil & Gas Operator | Dec 2004 |
| 13456 | Huffco Petroleum Corporation | | Oil & Gas Operator | Jul 1988 |
| 13457 | Huffman Arthur | | Gas Operator | Dec 2025 |
| 13458 | Huffman, H. L., LTD. | Fort Worth, TX 76113 | Oil & Gas Operator | Sep 1994 |
| 13459 | Huffman-Bowers Inc | New Lexington, OH 43764 | Oil & Gas Operator | Dec 2025 |
| 13460 | Hufo Production Corporation | Midland, TX 79702 | Oil & Gas Operator | Jul 2002 |
| 13461 | Huggs Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2003 |
| 13462 | Huggs Inc. & Bec, Et Al | | Oil & Gas Operator | Feb 1998 |
| 13463 | Huggs Incorporated, Et Al | | Oil & Gas Operator | Feb 1998 |
| 13464 | Hugh A. Hawthorne, Et Al | | Oil & Gas Operator | Dec 1978 |
| 13465 | Hughes & Hughes | | Oil & Gas Operator | May 1984 |
| 13466 | Hughes & New Oil Co. | | Oil Operator | Jul 1993 |
| 13467 | Hughes & New-D. Braswell | | Oil & Gas Operator | Jun 1983 |
| 13468 | Hughes & Patterson Oper. Corp. | Albany, TX 76430 | Oil & Gas Operator | Aug 2026 |
| 13469 | Hughes & Shawver | Olney, TX 76374 | Oil & Gas Operator | Aug 1996 |
| 13470 | Hughes Denny Offshore Expl Inc | | Oil & Gas Operator | Nov 1988 |
| 13471 | Hughes Drilling Co Inc | Enid, OK 73702 | Oil & Gas Operator | Apr 1998 |
| 13472 | Hughes Drilling Co, A General Partnership | Wellsville, KS 66092 | Oil Operator | Apr 2026 |
| 13473 | Hughes Eastern Corporation | Ridgeland, MS 39157 | Oil & Gas Operator | May 2026 |
| 13474 | Hughes Eastern Petroleum, Inc. | | Oil & Gas Operator | Apr 1993 |
| 13475 | Hughes Eastern Petroleum, LTD | | Oil & Gas Operator | Jun 1986 |
| 13476 | Hughes Gas Systems LLC | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Apr 2026 |
| 13477 | Hughes George B | Asher, OK 74826-0165 | Oil & Gas Operator | Mar 2011 |
| 13478 | Hughes Legacy LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2022 |
| 13479 | Hughes Oil Company Inc | Odessa, TX 79765 | Oil & Gas Operator | Feb 2004 |
| 13480 | Hughes Petroleum Corp. | | Oil Operator | Dec 1972 |
| 13481 | Hughes River Oil & Gas Company | Walker, WV 26180-0000 | Oil & Gas Operator | Dec 2021 |
| 13482 | Hughes Services, LLC | Wellsville, KS 66092 | Oil Operator | Apr 2026 |
| 13483 | Hughes Supplies, Inc. | Greenwood, LA 71033 | Oil & Gas Operator | Jul 2019 |
| 13484 | Hughes, Bill Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2026 |
| 13485 | Hughes, Bob Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | Jul 2011 |
| 13486 | Hughes, Dan A. Company | Beeville, TX 78104 | Oil & Gas Operator | May 2006 |
| 13487 | Hughes, Dan A. Company, L.P. | Beeville, TX 78104 | Oil & Gas Operator | Aug 2026 |
| 13488 | Hughes, Wise & Assoc., Inc | | Oil Operator | Jul 1987 |
| 13489 | Hughes-Denny Petroleum Co.,Inc | | Oil & Gas Operator | Dec 1987 |
| 13490 | Hughes-Leckelt-Maybrier PRDCRS | | Oil Operator | Mar 2022 |
| 13491 | Hughes-Nicklaus Oil Co., LTD. | | Oil & Gas Operator | Feb 1986 |
| 13492 | Hughey, Gaylord T. SR. Oper. Co. | Tyler, TX 75711 | Oil & Gas Operator | Feb 1998 |
| 13493 | Hughey, W. R., Operating Co. | Tyler, TX 75711 | Oil & Gas Operator | Feb 2005 |
| 13494 | Hugoton Energy C | | Oil & Gas Operator | Feb 2004 |
| 13495 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 13496 | Hugoton Operating Company, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2026 |
| 13497 | Hugus Investment Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Aug 2026 |
| 13498 | Huitt Joe A | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 13499 | Huitt Joe A Rev Trust | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2009 |
| 13500 | Hulen Operating Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Aug 2026 |