| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Hart Energies, LLC | Tulsa, OK 74133 | Oil & Gas Operator | Dec 2016 |
| 2 | Hartman Oil Co., Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 3 | Hasada Industrie | Oil & Gas Operator | Jul 1995 | |
| 4 | Hawkins Oil & Ga | Oil & Gas Operator | Jun 1995 | |
| 5 | Hayes Oil & Gas LLC | Attica, KS 67009 | Oil & Gas Operator | Jun 2025 |
| 6 | Herman L. Loeb, LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Jun 2025 |
| 7 | Howell Oil Compa | Oil & Gas Operator | Aug 1995 | |
| 8 | Hummon Corp. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2023 |