Constant Contact files for $86 million IPO

WASHINGTON, July 6 (Reuters) - Constant Contact Inc., which provides on-demand e-mail marketing, filed with regulators on Friday to raise up to $86.25 million in an initial public offering of common stock.

CIBC World Markets and Thomas Weisel Partners LLC are the lead underwriters for the IPO, according to a preliminary prospectus filed with the U.S. Securities and Exchange Commission.

The Waltham, Massachusetts-based company intends to list its stock on the Nasdaq under the symbol "CTCT" (CTCT.O).