Iron Mountain Incorporated Declares Quarterly Dividend16:15 EDT Friday, September 09, 2011 BOSTON (Business Wire) -- The Board of Directors of Iron Mountain Incorporated (NYSE: IRM) on Thursday, September 8, 2011, declared a cash dividend of $0.25 per share on the common stock of the company, payable on October 14, 2011 to shareholders of record at the close of business on September 23, 2011. About Iron Mountain Iron Mountain Incorporated (NYSE: IRM) provides information management services that help organizations lower the costs, risks and inefficiencies of managing their physical and digital data. The Company's solutions enable customers to protect and better use their information—regardless of its format, location or lifecycle stage—so they can optimize their business and ensure proper recovery, compliance and discovery. Founded in 1951, Iron Mountain manages billions of information assets, including business records, electronic files, medical data, emails and more for organizations around the world. Visit www.ironmountain.com. Investor Relations Contact:Iron Mountain IncorporatedStephen P. Golden, 617-535-4766Vice President, Investor Relationssgolden@ironmountain.com