TomoTherapy Files for IPO

TomoTherapy Inc., a Madison, Wis.-based developer of cancer treatment systems that use on-board CT imaging and conformal radiation therapy, has filed for a $201.25 million IPO. It plans to trade on the Nasdaq under ticker symbol TTPY, with Merrill Lynch serving as lead underwriter. The company has raised around $79 million in VC funding since 1999, from firms like The Endeavors Group, Open Prairie Ventures, State of Wisconsin Investment Board, Advantage Capital Wisconsin Partners and Ascension Health Ventures. www.tomotherapy.com