| 13501 | HRL Oilfields In | | Oil Operator | Jun 1998 |
| 13502 | HRM Resources II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 13503 | HRM Resources III LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2022 |
| 13504 | HRM Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2015 |
| 13505 | Hronek, Kenneth | Caldwell, TX 77836 | Oil & Gas Operator | Nov 2024 |
| 13506 | Hrubetz Oil Co. | Dallas, TX 75225 | Oil Operator | Sep 1986 |
| 13507 | Hrubetz Operating Company | Dallas, TX 75225 | Oil & Gas Operator | Feb 1999 |
| 13508 | HS Resources | Tulsa, OK 74136 | Oil & Gas Operator | Aug 1997 |
| 13509 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 13510 | Hsumy Oil & Gas Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2007 |
| 13511 | HT2 Exploration LLC | The Woodlands, TX 77381-4198 | Oil Operator | Aug 2024 |
| 13512 | HTC Gas Company, LLC | Hindman, KY 41822 | Gas Operator | Dec 2021 |
| 13513 | Hub Oil Company | | Oil Operator | Jan 1990 |
| 13514 | Hub-Cap Oil Company | Arlington, TX 76016 | Oil & Gas Operator | Dec 2013 |
| 13515 | Hub-Hill Inc | San Antonio, TX 78230 | Oil Operator | Nov 1998 |
| 13516 | Hubbard Creek Coal Gas LLC | | Gas Operator | Apr 2024 |
| 13517 | Hubbard Operating | Ozona, TX 76943 | Gas Operator | Nov 2024 |
| 13518 | Hubbs III, LLC | | Oil & Gas Operator | Mar 2024 |
| 13519 | Hubcap Oil, LLC | Arlington, TX 76016 | Oil Operator | Nov 2024 |
| 13520 | Hubco Exploration Inc. | Houston, TX 77073 | Oil & Gas Operator | Sep 2002 |
| 13521 | Huber Corporation* J M | | Oil & Gas Operator | Feb 2008 |
| 13522 | Huber Energy L.P. | Houston, TX 77079 | Oil & Gas Operator | Feb 2007 |
| 13523 | Huber Energy Panhandle LP | Houston, TX 77079 | Oil & Gas Operator | Oct 2005 |
| 13524 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Nov 2024 |
| 13525 | Huber J M Corpor | | Oil & Gas Operator | Dec 1996 |
| 13526 | Huber Oil Company, A General Partnership | Madison, KS 66860 | Oil & Gas Operator | Jun 2024 |
| 13527 | Hubl/Harbin | | Oil Operator | Dec 1994 |
| 13528 | Huck Farms LLC | Stratford, OK 74872 | Oil & Gas Operator | Sep 2024 |
| 13529 | Hudgens Lester E | Bartlesville, OK 74006-0215 | Oil Operator | Mar 2015 |
| 13530 | Hudgens Operating Co., Inc. | Abilene, TX 79603 | Oil & Gas Operator | Jul 1995 |
| 13531 | Hudson Brothers Mining Co., Inc. | Cisco, TX 76437 | Oil & Gas Operator | Jun 1994 |
| 13532 | Hudson Brothers, Inc. | Hutchinson, KS 67501 | Oil & Gas Operator | Jun 2007 |
| 13533 | Hudson Energy LLC | Bartlesville, OK 74006 | Oil Operator | Aug 2024 |
| 13534 | Hudson Group LLC | Casper, WY 82601 | Oil & Gas Operator | Sep 2024 |
| 13535 | Hudson Oil Company Of Texas | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2024 |
| 13536 | Hudson, Comer Oil & Gas | Cisco, TX 76437 | Oil & Gas Operator | Jan 2003 |
| 13537 | Huey Dean | | Oil Operator | Oct 2000 |
| 13538 | Hufco, Incorporated | | Oil & Gas Operator | Dec 2020 |
| 13539 | Huff Minerals, LTD. | Amarillo, TX 79101 | Gas Operator | Nov 2024 |
| 13540 | Huff, Jack | Midland, TX 79710 | Oil & Gas Operator | Dec 2004 |
| 13541 | Huffco Petroleum Corporation | | Oil & Gas Operator | Jul 1988 |
| 13542 | Huffman Arthur | Waynesburg, PA 15370-1437 | Gas Operator | Dec 2023 |
| 13543 | Huffman, H. L., LTD. | Fort Worth, TX 76113 | Oil & Gas Operator | Sep 1994 |
| 13544 | Huffman-Bowers Inc | New Lexington, OH 43764 | Oil & Gas Operator | Dec 2023 |
| 13545 | Hufo Production Corporation | Midland, TX 79702 | Oil & Gas Operator | Jul 2002 |
| 13546 | Huggs Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2003 |
| 13547 | Huggs Inc. & Bec, Et Al | | Oil & Gas Operator | Feb 1998 |
| 13548 | Huggs Incorporated, Et Al | | Oil & Gas Operator | Feb 1998 |
| 13549 | Hugh A. Hawthorne, Et Al | | Oil & Gas Operator | Dec 1978 |
| 13550 | Hughes & Hughes | | Oil & Gas Operator | May 1984 |
| 13551 | Hughes & New Oil Co. | | Oil Operator | Jul 1993 |
| 13552 | Hughes & New-D. Braswell | | Oil & Gas Operator | Jun 1983 |
| 13553 | Hughes & Patterson Oper. Corp. | Albany, TX 76430 | Oil & Gas Operator | Nov 2024 |
| 13554 | Hughes & Shawver | Olney, TX 76374 | Oil & Gas Operator | Aug 1996 |
| 13555 | Hughes Denny Offshore Expl Inc | | Oil & Gas Operator | Nov 1988 |
| 13556 | Hughes Drilling Co, A General Partnership | Wellsville, KS 66092 | Oil Operator | Jul 2024 |
| 13557 | Hughes Drilling Co. | Enid, OK 73702 | Oil & Gas Operator | Apr 1998 |
| 13558 | Hughes Eastern Corporation | Ridgeland, MS 39157 | Oil & Gas Operator | Jun 2024 |
| 13559 | Hughes Eastern Petroleum, Inc. | | Oil & Gas Operator | Apr 1993 |
| 13560 | Hughes Eastern Petroleum, LTD. | | Oil & Gas Operator | Jun 1986 |
| 13561 | Hughes Gas Systems LLC | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Aug 2024 |
| 13562 | Hughes George B | Asher, OK 74826-0165 | Oil & Gas Operator | Mar 2011 |
| 13563 | Hughes Legacy LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2022 |
| 13564 | Hughes Oil Company Inc | Odessa, TX 79765 | Oil & Gas Operator | Feb 2004 |
| 13565 | Hughes Petroleum Corp. | | Oil Operator | Dec 1972 |
| 13566 | Hughes River Oil & Gas Company | Walker, WV 26180-0000 | Oil & Gas Operator | Dec 2021 |
| 13567 | Hughes Services, LLC | Wellsville, KS 66092 | Oil Operator | Jul 2024 |
| 13568 | Hughes Supplies, Inc. | Greenwood, LA 71033 | Oil & Gas Operator | Jul 2019 |
| 13569 | Hughes, Bill Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 2024 |
| 13570 | Hughes, Bob Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | Jul 2011 |
| 13571 | Hughes, Dan A. Company | Beeville, TX 78104 | Oil & Gas Operator | May 2006 |
| 13572 | Hughes, Dan A. Company, L.P. | Beeville, TX 78104 | Oil & Gas Operator | Nov 2024 |
| 13573 | Hughes, Wise & Assoc., Inc | | Oil Operator | Jul 1987 |
| 13574 | Hughes-Denny Petroleum Co.,Inc | | Oil & Gas Operator | Dec 1987 |
| 13575 | Hughes-Leckelt-Maybrier PRDCRS | | Oil Operator | Mar 2022 |
| 13576 | Hughes-Nicklaus Oil Co., LTD. | | Oil & Gas Operator | Feb 1986 |
| 13577 | Hughey, Gaylord T. SR. Oper. Co. | Tyler, TX 75711 | Oil & Gas Operator | Feb 1998 |
| 13578 | Hughey, Ronnie Oil Company LLC | Stephens, AR 71764 | Oil Operator | Jul 2024 |
| 13579 | Hughey, W. R., Operating Co. | Tyler, TX 75711 | Oil & Gas Operator | Feb 2005 |
| 13580 | Hugoton Energy C | | Oil & Gas Operator | Feb 2004 |
| 13581 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 13582 | Hugoton Operating Company, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Nov 2024 |
| 13583 | Hugus Investment Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Nov 2024 |
| 13584 | Huitt Joe A | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 13585 | Huitt Joe A Rev Trust | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2009 |
| 13586 | Hulen Operating Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Nov 2024 |
| 13587 | Hull Enterprises Inc | Broken Arrow, OK 74012 | Oil & Gas Operator | Sep 2023 |
| 13588 | Hull Oil Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2021 |
| 13589 | Hull, Gerald Walter | Leicester, NY 14481 | Gas Operator | Dec 2023 |
| 13590 | Hulse Steve & Frank | Pawhuska, OK 74056 | Oil & Gas Operator | Aug 2000 |
| 13591 | Hulse, J. T. | Archer City, TX 76351 | Oil & Gas Operator | Nov 2024 |
| 13592 | Hulse, Tommy P. | Archer City, TX 76351 | Oil & Gas Operator | Feb 2009 |
| 13593 | Hulsebosch, Jessica | Elmira, NY 14901 | Gas Operator | Dec 2023 |
| 13594 | Hulsey Larry O & Co | Graham, TX 76046 | Oil & Gas Operator | Jun 2012 |
| 13595 | Hulsey Oil Company | Dallas, TX 75205 | Oil & Gas Operator | Aug 1999 |
| 13596 | Humak Processors, Inc. | Tyler, TX 75710 | Oil & Gas Operator | Aug 2005 |
| 13597 | Humber Oil Company | Albany, TX 76430 | Oil & Gas Operator | Nov 2024 |
| 13598 | Humble Oil & Refining Co. | Houston, TX 77252 | Oil & Gas Operator | Jan 2000 |
| 13599 | Humerickhouse Oil, LLC | Ottawa, KS 66067 | Oil Operator | Jul 2024 |
| 13600 | Humerickhouse, Donald L. | Ottawa, KS 66067 | Oil Operator | Dec 2009 |