X0303 4 2010-05-03 0001037540 BOSTON PROPERTIES INC BXP 0001217093 BURT FRANK D C/O BOSTON PROPERTIES, INC. 800 BOYLSTON STREET BOSTON MA 02199 0 1 0 0 Senior Vice President Common Stock, par value $.01 2010-05-03 4 C 0 4000 A 4000 I By spouse Common Stock, par value $.01 2010-05-03 4 S 0 1000 81.48 D 3000 I By spouse Common Stock, par value $.01 9207 D Common OP Units 2010-05-03 4 C 0 4000 0 D Common Stock 4000 0 I By spouse The Reporting Person redeemed the Common OP Units of Boston Properties Limited Partnership, of which the Issuer is the general partner. Each Common OP Unit may be redeemed, at the election of the holder, for cash equal to the fair market value of a share of the Issuer's Common Stock ("Common Stock") except that the Issuer may, at its election, acquire the Common OP Unit presented for redemption for one share of Common Stock. The Issuer elected to redeem the Reporting Person's Common OP Units with Common Stock. Represents the weighted average sale price. These shares were sold in multiple transactions at sale prices ranging from $81.476 to $81.484, inclusive. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. 1 for 1 /s/ Kelli A. DiLuglio, as attorney-in-fact 2010-05-05