DENVER--(BUSINESS WIRE)--CoreSite Realty Corporation (NYSE:COR), a premier provider of secure, reliable, high-performance data center solutions, today announced that its Board of Directors declared a cash dividend of $0.42 per share on common stock and common stock equivalents for the fourth quarter of 2014. This increase represents a $0.07, or 20%, increase from the previous quarterly dividend rate of $0.35 per share. The increased dividend reflects an annualized dividend rate of $1.68 per sha