Press Release

CoreSite Announces Jarrett Appleby as Chief Operating Officer

Denver, CO – April 10, 2012 – CoreSite Realty Corporation (NYSE: COR), a national provider of powerful, network-rich data centers, today announced that Jarrett Appleby will join the company as Chief Operating Officer, effective May 7, 2012.

Mr. Appleby joins CoreSite after more than three years at Equinix, where he served as Chief Marketing Officer. In that role, Mr. Appleby was responsible for go-to-market activities and launched the vertical market approach that supported revenue growth from less than $700 million to over $1.6 billion. Prior to Equinix, Appleby was with Reliance Globalcom LTD as chief strategy and marketing officer. In this capacity, he re-branded the $1.6 billion company under a single, consistent global brand. He also led the acquisition and integration of Vanco Group LTD and Yipes, which expanded Globalcom's capabilities in more than 230 countries.

Mr. Appleby founded and served as CEO of ILV Group, a boutique consultancy for companies seeking to accelerate growth with partnerships in hosting services, storage, managed services and application and content delivery services, and has held senior positions at MCI (now Verizon Business), AT&T, Qwest Solutions (now CenturyLink) and @Link Networks. Mr. Appleby holds a bachelor's degree in mathematics & economics and a master's in business administration from Lehigh University.

"We are pleased to have Jarrett join our executive team and help lead CoreSite's next phase of growth. Jarrett brings tremendous domain expertise in network-centric colocation as well as deep experience in the communications and broader technology industries," said Tom Ray. "As a 25-year industry veteran, he has a keen understanding of market dynamics, customer needs and operational requirements. We are confident that Jarrett will build on CoreSite's strategic focus of growing our network-centric data centers and delivering excellence in our customer experience."

"I am very excited to work with Tom and the leadership team to continue to build on the company's success and to support its growth to the next level," said Mr. Appleby. "With its network-centric data centers and focus on customers, CoreSite is well positioned to expand participation in the key industry and technology megatrends. I look forward to joining the team and contributing to its further success."

About CoreSite

CoreSite Realty Corporation (NYSE:COR) delivers secure, reliable, high-performance data center and interconnection solutions to a growing customer community across eight key North American markets. More than 1,200 of the world’s leading enterprises, network operators, cloud providers, and supporting service providers choose CoreSite to connect, protect and optimize their performance-sensitive data, applications and computing workloads. Our scalable, flexible solutions and 450+ dedicated employees consistently deliver unmatched data center options — all of which leads to a best-in-class customer experience and lasting relationships. For more information, visit

CoreSite Media Contact

Christine Shriver
Media Relations Manager

Forward Looking Statements

This press release may contain forward-looking statements within the meaning of the federal securities laws. Forward-looking statements relate to expectations, beliefs, projections, future plans and strategies, anticipated events or trends and similar expressions concerning matters that are not historical facts. In some cases, you can identify forward-looking statements by the use of forward-looking terminology such as "believes," "expects," "may," "will," "should," "seeks," "approximately," "intends," "plans," "pro forma," "estimates" or "anticipates" or the negative of these words and phrases or similar words or phrases that are predictions of or indicate future events or trends and that do not relate solely to historical matters. Forward-looking statements involve known and unknown risks, uncertainties, assumptions and contingencies, many of which are beyond CoreSite's control, that may cause actual results to differ significantly from those expressed in any forward-looking statement. These risks include, without limitation: the geographic concentration of CoreSite's data centers in certain markets and any adverse developments in local economic conditions or the demand for data center space in these markets; fluctuations in interest rates and increased operating costs; difficulties in identifying properties to acquire and completing acquisitions; significant industry competition; CoreSite's failure to obtain necessary outside financing; CoreSite's failure to qualify or maintain its status as a REIT; financial market fluctuations; changes in real estate and zoning laws and increases in real property tax rates; and other factors affecting the real estate industry generally. All forward-looking statements reflect CoreSite's good faith beliefs, assumptions and expectations, but they are not guarantees of future performance. Furthermore, CoreSite disclaims any obligation to publicly update or revise any forward-looking statement to reflect changes in underlying assumptions or factors, of new information, data or methods, future events or other changes. For a further discussion of these and other factors that could cause CoreSite's future results to differ materially from any forward-looking statements, see the section entitled "Risk Factors" in CoreSite's most recent annual report on Form 10-K, and other risks described in documents subsequently filed by CoreSite from time to time with the Securities and Exchange Commission.