CoreSite Realty Corporation, a data center REIT with over 600 customers and a portfolio of 11 operating facilities, announced terms for its IPO on Monday. The Denver, CO-based company plans to raise $270 million by offering 16.9 million shares at a price range of $15-$17. At the mid-point of the proposed range, CoreSite Realty will command a market value of $734 million. CoreSite Realty Corporation, which was founded in 2000 and booked $29 million in sales last year, plans to list on the NYSE under the symbol COR. Citi, BofA Merrill Lynch and RBC Capital Markets are the lead underwriters on the deal, which is expected to price during the week of September 20.