BOSTON--(BUSINESS WIRE)--The Board of Directors (the “Board”) of Iron Mountain Incorporated (NYSE: IRM), the storage and information management company, declared a cash dividend of $0.475 per share on the common stock of the company, payable on September 30, 2015 to shareholders of record at the close of business on September 11, 2015. About Iron Mountain Iron Mountain Incorporated (NYSE: IRM) is a leading provider of storage and information management services. The company’s real estate networ