MADISON, WI— Great Wolf Resorts Inc., a resort hotel operating company based here, filed to sell 13.25 million shares for about $15 to $17 per share in an initial public offering today, according to a published report. The U.S. Securities and Exchange Commission filing stated that Great Wolf expects to be able to raise net proceeds of $192.2 million in the deal. Once it gains the New York Stock Exchange listing it desires, the company will be listed under the symbol “GWX.” Citigroup will underwrite the transaction.