| 1 | Bach Oil Production | | Oil Operator | Jan 2025 |
| 2 | Bellaire Oil Company | | Oil & Gas Operator | Mar 2025 |
| 3 | Central Operating Inc | Denver, CO 80202 | Oil & Gas Operator | Mar 2025 |
| 4 | Coachman Energy Operating Company LLC | Englewood, CO 80111 | Oil & Gas Operator | May 2024 |
| 5 | Credo Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | Jan 2013 |
| 6 | Deutsch Oil Company | | Oil & Gas Operator | Jan 2025 |
| 7 | Earth Sound, Inc | | Oil Operator | Dec 2017 |
| 8 | Energy Search Company Inc | Aurora, CO 80011 | Oil & Gas Operator | Jun 2021 |
| 9 | Farmer Inc | | Oil Operator | Dec 2024 |
| 10 | Forestar Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2017 |
| 11 | Gore Oil Company | Wichita, KS 67202 | Oil & Gas Operator | Jan 2025 |
| 12 | Great Plains Energy, Inc. | Lincoln, NE 68516 | Oil & Gas Operator | Apr 2025 |
| 13 | Hummon Corp. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2023 |
| 14 | John G Brown, LLC | | Oil Operator | Dec 2024 |
| 15 | Kodiak Petroleum, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jan 2025 |
| 16 | Morgan, Mike | | Oil Operator | Dec 2014 |
| 17 | Murfin Drilling Company Inc | Wichita, KS 67202 | Oil & Gas Operator | Mar 2025 |
| 18 | Parklan Oil | | Oil Operator | Dec 2016 |
| 19 | Platte Valley Oil Co., Inc. | Ralston, NE 68127 | Oil Operator | Jan 2025 |
| 20 | Quantum Operating Company | Denver, CO 80201 | Oil & Gas Operator | Dec 2012 |
| 21 | Robuck Petroleum, LLC | Nacogdoches, TX 75965 | Oil & Gas Operator | May 2025 |
| 22 | Samuel Gary Jr. & Associates, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jan 2025 |
| 23 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | May 2025 |