 Wellington Management Group LLP cut its stake in shares of CoreSite Realty Corp NYSE:COR by 0.6 during the 1st quarter, HoldingsChannel.com reports. The fund owned 224,432 shares of the real estate investment trusts stock after selling 1,374 shares during the period. Wellington Management Group LLPs holdings in CoreSite Realty were worth 26,012,000 as of its ... 