HRPT says the offering was originally marketed for $250 million, but the company and the underwriters determined to increase the offering by $150 million in response to investor interest. The settlement of this sale is expected to occur on August 5. HRPT intends to use the net proceeds of this offering to reduce amounts outstanding under its revolving credit facility.

The joint book-running managers for the offering are Merrill Lynch & Co., RBC Capital Markets, and Wachovia Securities. The co-managing underwriters for this offering are Advest Inc.; Bank of America Securities LLC; BB&T Capital Markets; BNY Capital Markets Inc.; Comerica Securities; Commerzbank Securities; Ferris, Baker Watts Incorporated; Harris Nesbit; JJB Hilliard, WL Lyons, Inc.; KeyBanc Capital Markets; Legg Mason Wood Walker Inc.; Morgan Keegan & Co. Inc.; Piper Jaffrey; Raymond James; Stifel, Nicolaus & Co. Inc.; SunTrust Robinson Humphrey; Wedbush Morgan Securities; and Wells Fargo Securities LLC.

HRPT recently closed on its $247 million purchase of Hallwood Realty Partners LP. The company currently owns $4.5 billion of office and industrial properties with approximately 42 million sf of space located throughout the country.