Short Take: SignalSoft files for IPO

SignalSoft, a software company that helps wireless carriers pinpoint the location of their mobile subscribers, filed for an $80 million initial public stock offering. The company's stock will trade under the "SGSF" ticker on the Nasdaq stock market. Salomon Smith Barney will serve as lead managing underwriter and Donaldson, Lufkin & Jenrette and Lehman Brothers co-manage the offering. Location-based wireless Internet applications are to be a potentially lucrative market.