We invest in early to growth stage companies that offer products or services that dramatically improve the profitability of producing or consuming energy. Whether fuel or electricity, alternative or traditional, we help create companies that make energy more efficient, reliable, and cost-effective. Since our founding in 1996 we have managed approximately $500 million and we have delivered nearly 30 exits. We are currently investing out of our fourth fund and have offices in Philadelphia, Toronto, Montreal, Menlo Park and Calgary.