CoreSite Dually Honored by Northern Virginia Technology Council

— CoreSite Named 2021 Northern Virginia Technology Council (NVTC) Tech 100 Company —

— CoreSite’s SVP of General Management Named 2021 NVTC Tech 100 Executive —

DENVER–(BUSINESS WIRE)–CoreSite Realty Corporation (NYSE:COR) (“CoreSite,” or the “Company”), a premier provider of secure, reliable, high-uptime data center campuses with high-performance cloud access and interconnection solutions across the U.S., has been honored as a 2021 NVTC Tech 100 Company. Juan Font, CoreSite’s SVP of General Management, was also selected as a 2021 NVTC Tech 100 Executive.

“We are honored to have both CoreSite and Juan Font selected to the 2021 NVTC Tech 100 for innovative contributions and dynamic leadership to the Northern Virginia region’s tech evolution,” said Paul Szurek, CoreSite’s President and CEO. “CoreSite is proud of the highly interconnected Northern Virginia data center campus it has built over the past thirteen years. Over 350 of our enterprise and government customers rely on it to directly connect to all the major cloud providers to deploy secure, reliable and scalable multi-cloud hybrid IT solutions to future-proof their digital business.”

The 2021 NVTC Tech 100 includes a roster of cutting-edge companies, executives, innovators, NextGen leaders and rising stars who are driving tech innovation, leading economic growth, and making a positive impact in the region. The final NVTC Tech 100 Award list comprises of 64 tech companies, 33 executives, and three emerging leaders – each consistently demonstrating dedication, vision and innovation.

“While our nation continues to adapt to our new normal of living during a global pandemic, I am pleased that Virginia continues to be a leading tech hub of flourishing businesses and career opportunities. I am proud to announce that CoreSite and Juan Font are 2021 NVTC Tech 100 honorees. They are key contributors to making our region a vibrant and inclusive place to live, work and learn,” said Jennifer Taylor, president and CEO of NVTC.

About CoreSite

CoreSite Realty Corporation (NYSE:COR) delivers secure, high-uptime data center campuses with high-performance cloud access and interconnection solutions to a growing customer ecosystem across eight key North American markets. More than 1,370 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 480+ 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 www.CoreSite.com.

Forward Looking Statement

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 the Company’s data centers in certain markets and any adverse developments in local economic conditions or the level of supply of or 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, including indirect competition from cloud service providers; failure to obtain necessary outside financing; the ability to service existing debt; the 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; the effects on our business operations, demand for our services and general economic conditions resulting from the spread of the Novel Coronavirus (“COVID-19”) in our markets, as well as orders, directives and legislative action by local, state and federal governments in response to such spread of COVID-19; and other factors affecting the real estate industry generally. All forward-looking statements reflect the Company’s good faith beliefs, assumptions and expectations, but they are not guarantees of future performance. Furthermore, the Company 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 the Company’s future results to differ materially from any forward-looking statements, see the section entitled “Risk Factors” in its most recent annual report on Form 10-K, and other risks described in documents subsequently filed by the Company from time to time with the Securities and Exchange Commission.

Contacts

Megan Ruszkowski

Vice President of Marketing

720-446-2014

Megan.Ruszkowski@CoreSite.com

Kate Ruppe

Investor Relations Manager

303-222-7369

InvestorRelations@CoreSite.com