| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | H & M Petroleum Corporation | Lincoln, NE 68516 | Oil & Gas Operator | Feb 2024 |
| 2 | H & R Exploration & Production, Inc. | Sidney, NE 69162 | Oil Operator | May 2007 |
| 3 | Halliburton Oil | Oil & Gas Operator | Sep 2008 | |
| 4 | Herman L. Loeb, LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Dec 2023 |
| 5 | Hrbek, R.L. | Merino, CO 80741 | Oil & Gas Operator | Dec 2023 |
| 6 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |