Iron Mountain Declares Third Quarter 2017 Dividend

The Board of Directors (the “Board”) of Iron Mountain Incorporated (NYSE: IRM /ASX: INM), the storage and information management company, declared a cash dividend of USD $0.55 per share on the common stock and Chess Depository Interests (CDIs) of the company, payable to shareholders of record at the close of business on September 15, 2017.

The payable date for NYSE listed common stock holders is October 2, 2017, and the payable date for ASX listed CDIs is on October 16, 2017. CDI holders will be paid in Australian dollars, and the conversion is expected to occur on October 2, 2017.

About Iron MountainIron Mountain Incorporated (NYSE: IRM) is the global leader for storage and information management services. Trusted by more than 230,000 organizations around the world, Iron Mountain boasts a real estate network of more than 85 million square feet across more than 1,400 facilities in 52 countries dedicated to protecting and preserving what matters most for its customers. Iron Mountain’s solutions portfolio includes records management, data management, document management, data centers, art storage and logistics, and secure shredding help organizations to lower storage costs, comply with regulations, recover from disaster, and better use their information. Founded in 1951, Iron Mountain stores and protects billions of information assets, including critical business documents, electronic information, medical data and cultural and historical artifacts. Visit www.ironmountain.com for more information.

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Iron MountainInvestor Relations Contacts:Melissa Marsden, 617-535-8595Senior Vice President, Investor [e-mail] Freiha, 617-535-8404Director, Investor [e-mail]