The high technology entrepreneur and investor lives here. He is best known for co-founding and running (as its President and Chief Executive Officer) the enterprise software company Opsware. In July 2007, Horowitz sold Opsware to Hewlett-Packard for $1.6 billion in cash. In June 2009, Ben Horowitz and Marc Andreessen co-founded the venture capital firm Andreessen Horowitz in Menlo Park, CA.