BOSTON, January 5 /PRNewswire/ --

Iron Mountain Incorporated (NYSE: IRM), the global leader in information protection and storage services, announced that the Company's common stock was added to the SP 500 Index after the market closed today.

It is a tremendous honor to join the prestigious SP 500 Index, and we take great pride in this achievement, said Bob Brennan, Iron Mountain's president and chief executive officer. We view our inclusion as recognition of the importance of our services and the strength of our market position. It is also a testament to the hard work and dedication of the more than 20,000 Iron Mountain employees around the world.

Iron Mountain will be added to the SP 500 GICS (Global Industry Classification Standard) Industrials Economic Sector and the Diversified Support Services Sub-Industry Index.

About Iron Mountain

Iron Mountain Incorporated (NYSE: IRM) helps organizations around the world reduce the costs and risks associated with information protection and storage. The Company offers comprehensive records management and data protection solutions, along with the expertise and experience to address complex information challenges such as rising storage costs, litigation, regulatory compliance and disaster recovery. Founded in 1951, Iron Mountain is a trusted partner to more than 120,000 corporate clients throughout North America, Europe, Latin America and Asia Pacific. For more information, visit the Company's Web site at www.ironmountain.com.

Investor Relations Contact: Stephen P. Golden Vice President, Investor Relations sgolden@ironmountain.com +1-617-535-2994

Stephen P. Golden, Vice President, Investor Relations of Iron Mountain, +1-617-535-2994, sgolden@ironmountain.com