San Francisco -- ZoomInfo, a Massachusetts-based provider of business information services, said on Tuesday that it has spun off its "bizographic" advertising unit into a new San Francisco-based company, to be known as Bizo. The newly formed company's platform targets advertising based on people's "business demographics." Former ZoomInfo general manager and senior vice president Russell Glass will lead Bizo as its CEO. ZoomInfo first unveiled plans to launch the advertising platform in October, and since then has been operating the unit in stealth mode, building its technology platform and signing partnership agreements with advertisers and publishers. The spinoff is being completely funded by ZoomInfo, making company investors such as Venrock, Flagship and Vulcan significant shareholders in the new unit.