CoreSite Announces Tax Treatment of 2018 Distributions

DENVER–(BUSINESS WIRE)–CoreSite Realty Corporation (NYSE:COR), a premier provider of secure,
reliable, high-performance data
center and interconnection
solutions across the U.S., today announced the income tax allocation for
federal income tax purposes of its 2018 distributions on its common
stock. As shown in the table below, the common distributions allocable
to tax year 2018 are composed of 76.8572% ordinary dividends and
23.1428% non-dividend distributions.

CoreSite Common Stock (NYSE:COR; CUSIP: 21870Q105)

Record Date				Payable Date				Distribution Per Share				Taxable Ordinary Dividends*				Long-term Capital Gains				Long-term Unrecaptured Section 1250 Gain				Qualified Dividends				Return of Capital				Section 199A Dividends*
12/29/17				1/16/18				$0.980000				$0.753201				$0.00				$0.00				$0.00				$0.226799				$0.753201
3/30/18				4/16/18				$0.980000				$0.753201				$0.00				$0.00				$0.00				$0.226799				$0.753201
6/29/18				7/16/18				$1.030000				$0.791630				$0.00				$0.00				$0.00				$0.238370				$0.791630
9/28/18				10/15/18				$1.030000				$0.791630				$0.00				$0.00				$0.00				$0.238370				$0.791630
				Total				$4.020000				$3.089662				$0.00				$0.00				$0.00				$0.930338				$3.089662

* The 2018 Taxable Ordinary Dividends are treated as “qualified REIT
dividends” for purposes of Internal Revenue Code Section 199A.

CoreSite Realty Corporation’s tax return for the year ended December 31,
2018, has not been filed. As a result, the income tax allocation for the
2018 distributions shown above has been calculated using the best
available information as of the date of this release.

Please note that federal tax laws affect taxpayers differently, and the
information in this release is not intended as advice to shareholders on
how distributions should be reported on their tax returns. Also note
that state and local taxation of real estate investment trust
distributions varies and may not be the same as the taxation under the
federal rules. CoreSite encourages shareholders to consult with their
own tax advisors as to their specific federal, state, and local income
tax treatment of CoreSite distributions.

About CoreSite

CoreSite Realty Corporation (NYSE:COR) delivers secure, reliable,
high-performance data center and interconnection solutions to a growing
customer ecosystem across eight key North American markets. More than
1,350 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 www.CoreSite.com.

Forward-Looking Statements

This earnings release and accompanying supplemental information 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 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; the company’s
failure to obtain necessary outside financing; the company’s ability to
service existing debt; the company’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 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 the company’s 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

CoreSite Contact
Carole Jorgensen
Vice President of
Investor Relations and Corporate Communications
303.405.1012
InvestorRelations@CoreSite.com