SYSWIN, which is a leading primary real estate service provider in China with operations in 17 cities, filed on Thursday with the SEC to raise up to $100 million in an initial public offering. The Beijing-based company, which was founded in 2007 and booked $65 million in sales last year, plans to list on the NYSE under the symbol SYSW. Morgan Stanley is the lead underwriter on the deal, for which pricing terms and timing were not disclosed.