Clean Energy

The search for clean energy solutions is driven by the critical need for energy security and alternative energy sources among developed nations and emerging countries. Oak seeks innovations that have the potential to become new platforms for these clean technologies, and invests in business models that are successful without permanent government price subsidies.


Sundrop Fules, Inc.
ReliOn, Inc.
eSolar, Inc.
Protean Electric
Phononic, Inc.
Nexant, Inc.
Boston-Power, Inc.