| 1701 | Hyco Oil Inc | Newcastle, WY 82701 | Oil & Gas Operator | Dec 2006 |
| 1702 | Hyde-Marrs, Inc. | Wichita, KS 67202 | Oil Operator | Aug 1997 |
| 1703 | Hydroc Oil Company | Borger, TX 79007 | Oil & Gas Operator | May 2012 |
| 1704 | Hydrocarbon Exploration, Inc. | | Oil & Gas Operator | Dec 2008 |
| 1705 | Hydrocarbon Generation, Inc. | Allegany, NY 14706 | Oil & Gas Operator | Dec 2023 |
| 1706 | Hydrocarbon Horizons, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Jun 2023 |
| 1707 | Hydrocarbon Inv, Inc | | Oil Operator | Dec 2018 |
| 1708 | Hydrocarbon Lease Management LTD | Addison, TX 75001 | Oil & Gas Operator | Jul 2002 |
| 1709 | Hydrocarbon Management, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Dec 1996 |
| 1710 | Hydrocarbon MGMT., Inc. | | Oil & Gas Operator | Mar 1997 |
| 1711 | Hydrocarbon Operating, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Feb 2025 |
| 1712 | Hydrocarbon Resources LTD | Medina, OH 44256 | Oil & Gas Operator | Dec 2022 |
| 1713 | Hydrocarbon Technology Services | | Oil & Gas Operator | Dec 2000 |
| 1714 | Hydrogeo Energy, LLC | Houston, TX 77074 | Oil Operator | Feb 2025 |
| 1715 | Hydrogeo, L.L.C. | Houston, TX 77074 | Oil & Gas Operator | Feb 2025 |
| 1716 | Hyer,Na & CJ Aldenhoven Trusts | Lipan, TX 76462 | Gas Operator | Oct 2017 |
| 1717 | Hyland Oil Corporation | | Oil & Gas Operator | Apr 1990 |
| 1718 | Hylmn LLC | Wills Point, TX 75169 | Oil Operator | Jun 2022 |
| 1719 | Hyman Muslow | | Oil Operator | Jun 1995 |
| 1720 | Hyndrex Resources | | Oil & Gas Operator | Apr 2018 |
| 1721 | Hyperion Energy LP | Dallas, TX 75206 | Oil & Gas Operator | May 2014 |
| 1722 | Hyperion Oil & Gas LLC | Dallas, TX 75251 | Oil & Gas Operator | Feb 2025 |
| 1723 | Hyquest Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Mar 2015 |