Quercus Trust

Quercus Trust is the extremely low-profile (see homepage) greentech VC and investment firm headed by the equally incognito David Gelbaum. Quercus' more than $400M in investments span at least 30 greentech companies, including: Ascent, Open Energy, DayStar, Emcore, Akeena, Cyrium, Solar Enertech, Spire, Sencera, Octillion, Enviromission, Beacon, GridPoint, Standard Renewable, LiveFuels, BlueFire, Environmental Power, Dynamotive, Firefly, Axion, Electro Energy, Odyne, Ener1, China Solar, Energy Focus, Thermoenergy, Lighting Science, Promethean, Thermoenergy, Worldwater, Colorep, Hydro, Nanoptek, Magenn, and [Entech Solar](http://www.crunchbase.com/organization/entech-solar).