Iron Mountain Incorporated Declares Quarterly Dividend

December 16, 2013

BOSTON--(BUSINESS WIRE)-- The Board of Directors of Iron Mountain Incorporated (NYSE: IRM) declared a cash dividend of $0.27 per share on the common stock of the company, payable on January 15, 2014 to shareholders of record at the close of business on December 27, 2013.

About Iron Mountain

Iron Mountain Incorporated (NYSE: IRM) is a leading provider of storage and information management solutions. The Company’s real estate network of over 64 million square feet across more than 1,000 facilities in 36 countries allows it to serve customers around the world. And its solutions for records management, data backup and recovery, document management and secure shredding help organizations to lower storage costs, comply with regulations, recover from disaster, and better use their information for business advantage. Founded in 1951, Iron Mountain stores and protects billions of information assets, including business documents, backup tapes, electronic files and medical data. Visit www.ironmountain.com for more information.

Source: Iron Mountain Incorporated

Investor Relations:

Iron Mountain Incorporated

Melissa Marsden, 617-535-8595

Senior Vice President, Investor Relations

melissa.marsden@ironmountain.com

or

Stephen P. Golden, 617-535-4769

Vice President, Investor Relations

sgolden@ironmountain.com