 Vanguard Group Inc. decreased its position in shares of CoreSite Realty Corp NYSE:COR by 1.1 in the 2nd quarter, according to its most recent 13F filing with the SEC. The firm owned 5,418,680 shares of the real estate investment trusts stock after selling 61,739 shares during the quarter. Vanguard Group Inc. owned approximately 0.13 of ... 