We're Iron Mountain, a Storage and Information Management Company Iron Mountain is a storage and information management company. Our real estate network of more than 1,000 facilities in 35 countries allows us to serve customers with speed and accuracy. Publicly traded under NYSE symbol IRM, Iron Mountain is a S&P 500 company and a member of the Fortune 1000 (currently ranked: 643). Organizations in every major industry and of all sizes—including more than 97% of the Fortune 1000—rely on Iron Mountain as their information management partner.