We are a multi-stage venture capital firm that invests in the areas of alternative and traditional energy, mobility, and sustainability. Within these segments we invest in companies at all stages of development, from seed stage to companies with substantial commercial revenues. Depending on stage and risk profile, we may invest between $500,000 and $25 million in a round or company. Our philosophy focuses on partnership, internally and externally: a collegial and collaborative spirit that infuses our own team and extends to the companies in which we invest. We believe that the open exchange of ideas that results from our close collaboration with entrepreneurial management is essential to building strong companies and lasting value.