BlueHub Capital was an early investor in ZipCar
http://bluehubcapital.org/sites/default/files/files/pdf/SB_Zipcar.pdf

Support for “double bottom line” investments in mission-driven companies

Zipcar, Boston, Massachusetts

The BlueHub Capital Venture Fund, under its prior name as Boston Community Venture Fund, began investing in companies with strong prospects “Financial returns for our investors and social returns for the community.” for double- and triple bottom line returns in the late 1990’s. Zipcar was an early investment for us and a no-brainer: Zipcar seeks to reduce carbon emission through a mainstream car share that ultimately keeps redundant cars off the road. Zipcar was sold to Avis in 2012, resulting in solid financial returns. As Elyse Cherry, BlueHub Capital CEO and Venture Fund President puts it, “Financial returns for our investors, social returns for the community—that’s what the Venture Fund is all about.”