65. CoreSite

2016 Rank: 71

Top Executive: Tom Ray, President & CEO

Location: Denver

www.coresite.com

Headquartered in Denver, CoreSite operates 17 data centers in eight US cities that offer colocation services to business customers with a wide variety of capacity requirements. Customers can lease equipment ranging from small racks to entire data centers. Those facilities come with dense connectivity to network providers, onramps to public cloud providers and CoreSite's Any2Exchange Internet peering exchange.