Harris & Harris Group is a publicly traded venture capital firm which invests in nanotechnology companies. Harris & Harris Group was incorporated in 1981, and it completed an initial public offering (IPO) in 1983. Throughout its history, Harris & Harris Group made over 90 investments. Over 60 of these investments have generated realized returns of approximately $160 million on cumulative invested capital of approximately $92 million. In July 2013, portfolio company Xradia was acquired by Carl Zeiss. Other investments include Nantero, Nanosys, Kovio, and Ensemble Therapeutics.