Iron Mountain Incorporated Announces 8% Increase to Quarterly Dividend

Raises Annual Dividend Rate to $1.08 per Share

BOSTON--()--Iron Mountain Incorporated (NYSE: IRM), the information management company, announced today that its board of directors has declared a quarterly cash dividend of $0.27 per share, or $1.08 per share on an annualized basis. This is an increase of 8% over the quarterly dividend previously paid. The dividend is payable on July 13, 2012 to stockholders of record on June 22, 2012.

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 for more information.

Contacts

Iron Mountain Incorporated
Investor Relations
Stephen P. Golden, 617-535-4766
Vice President, Investor Relations
sgolden@ironmountain.com

Contacts

Iron Mountain Incorporated
Investor Relations
Stephen P. Golden, 617-535-4766
Vice President, Investor Relations
sgolden@ironmountain.com