Gina Bianchini Leaving Ning, Joining Andreessen Horowitz

Gina Bianchini is stepping down as CEO of Ning, in order to become an entrepreneur-in-residence with venture capital firm Andreessen Horowitz. The news was first reported by All Things D.

Bianchini is a co-founder of Ning, which offers an online platform for people who want to create their own social networks. Her fellow co-founder, and Ning chairman, is Marc Andreessen, who is one of two Andreessen Horowitz partner.

She will be succeeded by Ning CFO Jason Rosenthal.

Ning reportedly has raised over $100 million in VC funding, including a $15 million infusion last year from Lightspeed Venture Partners at a $750 million valuation. www.ning.com