Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
SELSAM ROBERT E
   2. Issuer Name and Ticker or Trading Symbol
BOSTON PROPERTIES INC [BXP] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Senior Vice President
(Last)
(First)
(Middle)
C/O BOSTON PROPERTIES, INC., 800 BOYLSTON ST.		 3. Date of Earliest Transaction (Month/Day/Year)
08/06/2009
(Street)

BOSTON, MA 02199		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock, par value $.01 08/06/2009   M   10,000 A $ 35.26 (1) 30,959.518 (2) D  
Common Stock, par value $.01 08/06/2009   S   10,000 D $ 60.98 (3) 20,959.518 D  
Common Stock, par value $.01               800 I By children

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (right to buy) $ 35.26 (1) 08/06/2009   M     10,000   (4) 01/18/2011 Common Stock 10,000 $ 0 15,945 (1) D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
SELSAM ROBERT E
C/O BOSTON PROPERTIES, INC.
800 BOYLSTON ST.
BOSTON, MA 02199		       Senior Vice President  

Signatures

 /s/ Kelli A. DiLuglio, as Attorney-in-Fact   08/06/2009
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) In January 2008, the Issuer paid a special dividend of $5.98 per share of common stock to all stockholders of record as of the close of business on December 31, 2007. In connection with this special dividend, the Issuer's Board of Directors adjusted all options that were awarded, but not exercised prior to the ex-dividend date for the special dividend to account for the effect of the special dividend. The number of shares subject to each such option was increased and the exercise price correspondingly decreased such that each option had the same fair value to the holder before and after giving effect to the payment of the special dividend. Pursuant to this adjustment, the number of shares underlying Mr. Selsam's options increased by 1,523 from 24,422 to 25,945 in December 2007 and the per share exercise price was correspondingly decreased.
(2) Includes 123.4429 shares which the Reporting Person acquired in May 2008, August 2008, November 2008, February 2009, May 2009 and August 2009 pursuant to the Boston Properties, Inc. Dividend Reinvestment and Stock Purchase Plan.
(3) Reflects the weighted average sale price. These shares were sold by the reporting person in multiple transactions with the sale prices ranging from $60.84 to $61.17, 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 purchased or sold at each separate price.
(4) The options vested in three equal annual installments beginning on January 18, 2002.

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