| 201 | Hughes-Nicklaus Oil Co., LTD. | | Oil & Gas Operator | Feb 1986 |
| 202 | Hunt Brothers Producing Co Inc | Redding, CA 96049-2516 | Oil & Gas Operator | Sep 2012 |
| 203 | Hunt Energy Corporation | | Oil & Gas Operator | Feb 2002 |
| 204 | Hunt Industries, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2000 |
| 205 | Hunt Investment Corporation | | Oil & Gas Operator | Jun 1989 |
| 206 | Hunt Oil Co., Et Al | | Oil & Gas Operator | Nov 1992 |
| 207 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Feb 2025 |
| 208 | Hunt Petroleum (Aec), Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 209 | Hunt Petroleum Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 210 | Hunter Oil & Gas, LLC | | Oil & Gas Operator | Oct 2001 |
| 211 | Huntlyn Operating, LLC | | Oil & Gas Operator | Sep 2022 |
| 212 | Hurley Oil And Gas Company | | Oil & Gas Operator | Jan 1997 |
| 213 | Hurley Petroleum Corporation | Baton Rouge, LA 70821 | Oil & Gas Operator | Feb 2000 |
| 214 | Hurricane Iron & Steel, Inc. | | Oil Operator | Dec 1993 |
| 215 | Hutson Oil Co. | | Oil & Gas Operator | Jun 2024 |
| 216 | Hy-Mark Oil & Gas, Inc. | | Oil Operator | Mar 1991 |
| 217 | Hyatt Exploration, Inc. | | Oil Operator | Jul 1995 |
| 218 | Hyco Oil Inc | Newcastle, WY 82701 | Oil & Gas Operator | Dec 2006 |
| 219 | Hydrocarbon MGMT., Inc. | | Oil & Gas Operator | Mar 1997 |
| 220 | Hyman Muslow | | Oil Operator | Jun 1995 |
| 221 | Hyperion Energy LP | Dallas, TX 75206 | Oil & Gas Operator | May 2014 |