7. CoreSite Realty (COR): +55.22%

At first glance CoreSite is a traditional data center and co-location provider. But the company is pushing hard into the cloud, offering such solutions as Amazon Web Services Direct Connect in New York and Los Angeles. CenturyLink is also extending its services into CoreSite’s data centers. For its Q3 ended Sept. 30, 2012, CoreSite said revenues jumped 21.2 percent to $53.8 million. Talkin’ Cloud’s 2013 Prediction: It sounds like CoreSite benefitted from some cloud hype, and that hype could cool just a bit in 2013…