Senior Housing Properties Trust (NYSE: SNH) today announced it commenced a public offering of 8,000,000 common shares. SNH expects to use the proceeds of this offering to repay amounts outstanding under its revolving credit facility. It is contemplated that the underwriters will also be granted a 30-day option to purchase up to an additional 1,200,000 common shares. The joint bookrunning managers for this offering are Jefferies & Company, Inc., Citigroup and UBS Investment Bank. This press release is neither an offer to sell nor a solicitation of an offer to buy 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: Jefferies & Company, Inc., 520 Madison Avenue, 12th floor, New York, NY 10022, telephone: (877) 547-6340, Citigroup, Prospectus Department, Brooklyn Army Terminal, 140 58th Street, 8th floor, Brooklyn, NY 11220, telephone: (800) 831-9146 or UBS Investment Bank, Attn: Prospectus Dept., 299 Park Avenue, New York, NY 10171, telephone: (888) 827-7275. 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 SNH’S PRESENT BELIEFS AND EXPECTATIONS, BUT THESE STATEMENTS ARE NOT GUARANTEED. FOR EXAMPLE, ALTHOUGH THIS PRESS RELEASE REFERS TO AN OFFERING OF 8,000,000 COMMON SHARES, GREATER OR FEWER THAN 8,000,000 COMMON SHARES MAY BE SOLD OR THIS OFFERING MAY BE WITHDRAWN. INVESTORS SHOULD NOT PLACE UNDUE RELIANCE UPON ANY FORWARD LOOKING STATEMENT.