CommonWealth REIT Announces Proposed Public Offering of 27,000,000 Common Shares

  CommonWealth REIT Announces Proposed Public Offering of 27,000,000 Common
  Shares

Business Wire

NEWTON, Mass. -- February 25, 2013

CommonWealth REIT (NYSE: CWH) today announced it has commenced a public
offering of 27,000,000 common shares. CWH expects that the underwriters will
also be granted a 30-day option to purchase up to an additional 4,050,000
common shares.

CWH expects to use the proceeds of this offering to purchase up to $450
million of unsecured senior notes due between 2014 and 2016 in a tender offer
CWH has also announced today. The tender offer is conditioned upon this
offering. However, the completion of the tender offer is not a condition of
the sale of the common shares being sold in this equity offering. Proceeds
from the sale of common shares not used to repurchase notes in the tender
offer will be used to repay other debt and to fund general business purposes.
This press release is not an offer to buy or solicitation of an offer to sell
any of the notes subject to the tender offer; for more information about the
tender offer, please see a separate press release regarding the tender offer
and the documents referenced therein.

The joint book running managers for the common share offering are Citigroup,
BofA Merrill Lynch, UBS Investment Bank and Morgan Stanley. The joint lead
managers are Jefferies and RBC Capital Markets.

This press release is neither an offer to sell nor a solicitation of an offer
to buy CWH common shares, nor shall there be any sale of these securities in
any state or jurisdiction in which the offer, solicitation or sale would be
unlawful prior to registration or qualification under the securities laws of
such state or jurisdiction. The preliminary prospectus supplement relating to
this offering and related prospectus are expected to be filed with the
Securities and Exchange Commission (SEC) and copies can be obtained by
contacting the offices of: Citigroup, c/o Broadridge Financial Solutions, 1155
Long Island Avenue, Edgewood, NY 11717, telephone: (800) 831-9146; BofA
Merrill Lynch, Attn: Prospectus Department, 222 Broadway, New York, NY 10038;
email dg.prospectusrequests@baml.com; UBS Investment Bank, Attn: Prospectus
Department, 299 Park Avenue, New York, NY 10171, telephone: (888) 827-7275; or
Morgan Stanley, Attn: Prospectus Department, 180 Varick Street, 2^nd Floor,
New York, NY 10014, telephone (866) 718-1649, email:
prospectus@morganstanley.com.

                WARNING CONCERNING FORWARD LOOKING STATEMENTS

THIS PRESS RELEASE CONTAINS FORWARD LOOKING STATEMENTS WITHIN THE MEANING OF
THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995 AND OTHER SECURITIES
LAWS. THESE FORWARD LOOKING STATEMENTS ARE BASED UPON CWH’S PRESENT BELIEFS
AND EXPECTATIONS, BUT THESE STATEMENTS ARE NOT GUARANTEED. FOR EXAMPLE,
ALTHOUGH THIS PRESS RELEASE REFERS TO AN OFFERING OF 27,000,000 COMMON SHARES,
GREATER OR LESS THAN 27,000,000 COMMON SHARES MAY BE SOLD OR THIS OFFERING MAY
BE WITHDRAWN. INVESTORS SHOULD NOT PLACE UNDUE RELIANCE UPON ANY FORWARD
LOOKING STATEMENT.

 A Maryland Real Estate Trust with transferable shares of beneficial interest
 listed on the New York Stock Exchange. No shareholder, Trustee or officer is
          personally liable for any act or obligation of the Trust.

Contact:

CommonWealth REIT
Timothy A. Bonang, Vice President, Investor Relations
Carlynn Finn, Senior Manager, Investor Relations
617-796-8222
www.cwhreit.com