Iron Mountain has a rich and colorful history dating back to 1951, when a depleted iron ore mine in upstate New York was converted to the nation's first secure underground records storage center, designed to protect corporate vital records in the event of a nuclear holocaust. Since that time, the motivation for records storage and management services has changed, and Iron Mountain has been at the vanguard of this evolving industry.

1951 Iron Mountain Atomic Storage Corporation is established by Herman Knaust 1975 Iron Mountain, the present company, purchases the underground mine and the nearby, larger underground site from Knaust 1978 Iron Mountain purchases nearby above-ground record center and begins developing high-density storage systems 1980 Company expands to New England with the purchase of a third underground facility   Becomes a founding member of Professional Records and Information Services Management (PRISM), formerly ACRC 1981 C. Richard Reese joins the Company as president and CEO 1983 Iron Mountain expands to New Hampshire and New Jersey 1986 Company establishes corporate headquarters in Boston and purchases New England Storage Warehouse   Becomes dominant records management company in the Northeast 1988 Iron Mountain becomes a national company with the acquisition of Bell & Howell Records Management Company 1991 Iron Mountain introduces customers to SafeKeeper, its proprietary records inventory management system 1994 Company launches Records Management Consulting Services 1995 Richard Reese is named chairman of the board 1996 Iron Mountain begins trading on the NASDAQ under the symbol IMTN 1997 Iron Mountain becomes the leading software escrow company in the world with the acquisition of Data Securities International, Inc. (DSI)   Enters the Health Information Management services market with the acquisition of Record Masters (HIMSCorp.) 1998 Iron Mountain becomes the leading off-site data protection company in the U.S. with the acquisition of Arcus Data Security, Inc. (renamed Off-Site Data Protection in 2001) 1999 Company establishes its first international presence through acquisition of British Data Management (BDM) in the UK   Enters the Mexican market with the acquisition of SAC Mexico   Moves to the New York Stock Exchange under the symbol IRM 2000 Iron Mountain enters Latin America through the acquisition of Storage, S.A. in Argentina   Merges with Pierce Leahy Archives, the second largest records management company, making Iron Mountain the only company to provide a full line of records and information management services throughout the Western Hemisphere and in Europe   Establishes Iron Mountain Confidential Destruction division (later renamed Information Destruction) 2001 Company launches two key technology solutions for information protection and storage: Electronic Vaulting services for online backup and recovery and Digital Archives for electronic records management 2002 The Boston Business Journal names Iron Mountain "Company of the Year" 2003 Iron Mountain debuts on the Fortune 1000 list at #887   Ernst & Young names CEO Richard Reese "N.E. Entrepreneur of the Year"   Significantly increases its presence throughout Europe by acquiring the Information Management Services unit of Hays PLC 2004 Iron Mountain climbs to #857 on the Fortune 1000 list   Expands its Intellectual Property Management services by acquiring domain name management firm Arcemus®   Expands Secure Shredding services in Canada through the acquisition of Ontario-based franchiser Proshred Security International Inc.   Forms the Iron Mountain Digital business unit, following the acquisition of Connected Corporation, a leader in online backup and distributed data protection   Company appoints Bob Brennan as President of North America 2005 Iron Mountain moves up to #811 on the Fortune 1000 list   Enters the Pacific Rim with the acquisition of the Australian and New Zealand operations of Pickfords Records Management ("PRM")   Bob Brennan is promoted to President and Chief Operating Officer   Acquires LiveVault Corporation, a leading provider of disk-based online server backup and recovery solutions, further extending the Company's technology portfolio 2006 Iron Mountain rises to #783 on the Fortune 1000 list   Iron Mountain expands Government Services Organization; opens new government-focused business unit headquarters in Dulles, Va.   Acquires DigiGuard, a leading provider of data protection services in Australia and New Zealand   Boston Leader Summit honors Richard Reese with  Visionary Leadership award 2007 Iron Mountain ascends to #780 on the Fortune 1000 list   Debuts in Forbes magazine's "Top 400 Best Big Companies"   Extends records management portfolio with acquisition of Accutrac Software, Inc.   Acquires Stratify, Inc., augmenting its suite of eDiscovery services 2008 Iron Mountain moves to #722 on the Fortune 1000 list   Bob Brennan is elected president and CEO and Richard Reese becomes executive chairman of the board    Security magazine names Iron Mountain to its annual ranking of the nation's most secure companies, the Security 500  2009 Iron Mountain climbs to #681 on the Fortune 1000 list   Joins the S&P 500 Index   Tops $3 billion in annual revenue for the first time in the company’s history