TomoTherapy Files for Secondary Share Sale

TomoTherapy Inc. (Nasdaq: TTPY) has filed for a secondary offering of 8.5 million shares, which would currently be valued at approximately $213 million. Merrill Lynch is serving as lead underwriter. Sellers include Venture Investors, Avalon Technology, The Endeavors Group, Open Prairie Ventures, Ascension Health Ventures and the Wisconsin Alumni Research Foundation . TomoTherapy is a Madison, Wis.-based developer of cancer treatment systems that use on-board CT imaging and conformal radiation therapy.