David Marcus is the managing partner of Chestnut Capital, which is a partner, investor, or shareholder in several wind energy developers, including Ridgeline, Midwest Renewable, NedPower, Greenlight, Wind-works, Foresight, and the Clean Power Income Fund. A number of these entities have since been sold to larger European power companies including Shell, Iberdrola, and BP. Chestnut has also invested in several wind energy, green energy, and clean tech entities, including Princeton Power, Fallbrook Technologies, Seahorse Power, Protonex, Metabolix, GreenFuel, Wilson TurboPower, Verdant Power, Aircuity, American Biomass, Cellfor, Lux Research, GrainPro, and Geo2. Chestnut is also an LP in the Mass Green Energy Fund and four energy funds at Carlyle/Riverstone. David Marcus is CEO and Director of General Compression, a private company dedicated to providing Dispatchable Wind: clean, renewable wind energy, delivered on demand.