Kate Mitchell, a partner at Scale Venture Partners, makes notes on a presentation at her office in Foster City, California, on Friday, Aug. 21, 2015. A recent study found that out of more than 800 venture capital firms in the U.S. less than a third of them employ any female venture capitalists whatsoever. Scale Venture Partners has six female venture capitalists, more then most in the U.S. It tied for third place in the nation with a handful of other firms. Photo: Gabrielle Lurie, Special To The Chronicle