- Automated Mudlogging Systems
 - Littleton - Serving oil, gas, and coalbed methane industries. - Bentek Energy Research, Inc.
- Lakewood - Energy market and management consulting services.
- Global Energy Decisions
- Boulder - Holding company investing in energy information companies. Includes news, updates, and portfolio snapshots.
- Golden Energy Services, Inc.
- Golden - Specialises in the development and on-going management of natural gas and electricity supplies for large energy users.
- Prima Energy Corporation
- Denver - Engaged in the exploration for, acquisition, development, and production of, crude oil and natural gas.
- Renetech@
- Denver
- Western Gas Resources, Inc.
- Denver - Services include gathering, transporting, compressing and storing natural gas.
- Zavanna, LLC
- Denver - High-tech oil and gas exploration and development company based actively exploring in 8 U.S. and 2 Canadian basins.
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