X0202 4 2006-04-28 0001037540 BOSTON PROPERTIES INC BXP 0001229891 TWARDOCK DAVID A PRUDENTIAL MORTGAGE CAPITAL COMPANY 100 MULBERRY STREET NEWARK NJ 01702 1 0 0 0 Dividend Equivalent Rights 2006-04-28 4 A 0 28.82 0 A Common Stock 28.82 3770.19 D The rights convert into Common Stock on a 1-for-1 basis. Acquired as quarterly dividends on April 28, 2006. The rights were granted as a component of the Phantom Stock Units that were awarded under the Boston Properties, Inc. 1997 Stock Option and Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director compensation fees. The rights are to be settled in shares of Common Stock upon the Reporting Person's retirement from the Boston Properties Board of Directors. /s/ Kelli A. DiLuglio, as Attorney-in-Fact 2006-05-02