Deutsche Bank AG
Taunusanlage 12, D-60325
Frankfurt am Main
Federal Republic of Germany



Jeffrey A. Ruiz
Vice President
Telephone: (212) 250-3667


                                                               February 06, 2006

Securities and Exchange Commission
SEC Document Control
450 Fifth Street, N.W.
Washington, DC  20549
Attn:  Filing Desk


Dear Sir or Madame:

         Re:  Filing of Schedule 13G - Boston Properties Inc.



  Pursuant to Rule 13d-1 of the Securities Exchange Act of 1934, attached is one
 copy of Schedule 13G with respect to the common stock of the above referenced
 corporation.

Please acknowledge your receipt of the Schedule 13G by return e-mail
confirmation.

                                                                 Sincerely,



                                                                 Jeffrey A. Ruiz









Enclosures



                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934

                             Boston Properties Inc.
                     ---------------------------------------
                                 NAME OF ISSUER:


                                  Common Stock
                     ---------------------------------------
                          TITLE OF CLASS OF SECURITIES

                                    101121101
                     ---------------------------------------
                                  CUSIP NUMBER


                                December 30, 2005
                     ---------------------------------------
             (Date of Event Which Requires Filing of this Statement)


     Check the appropriate box to designate the rule pursuant to which this
                               Schedule is filed:

                                [X] Rule 13d-1(b)

                                [ ] Rule 13d-1(c)

                                [ ] Rule 13d-1(d)



1. NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS Deutsche Bank AG* 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (A) [ ] (B) [ ] 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION Federal Republic of Germany NUMBER OF 5. SOLE VOTING POWER SHARES 5,820,865 BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 0 EACH 7. SOLE DISPOSITIVE POWER REPORTING 5,888,432 PERSON WITH 8. SHARED DISPOSITIVE POWER 37,550 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,928,482 10.CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES [ ] 11.PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 5.26% 12. TYPE OF REPORTING PERSON BK, HC, CO * In accordance with Securities Exchange Act Release No. 39538 (January 12, 1998), this amended filing reflects the securities beneficially owned by the Private Clients and Asset Management business group ("PCAM") of Deutsche Bank AG and its subsidiaries and affiliates (collectively, "DBAG"). This filing does not reflect securities, if any, beneficially owned by any other business group of DBAG. Consistent with Rule 13d-4 under the Securities Exchange Act of 1934 ("Act"), this filing shall not be construed as an admission that PCAM is, for purposes of Section 13(d) under the Act, the beneficial owner of any securities covered by the filing. 1. NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS RREEF America, L.L.C. 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (A) [ ] (B) [ ] 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware NUMBER OF 5. SOLE VOTING POWER SHARES 5,796,750 BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 0 EACH 7. SOLE DISPOSITIVE POWER REPORTING 5,796,750 PERSON WITH 8. SHARED DISPOSITIVE POWER 0 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,796,750 10.CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES [ ] 11.PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 5.15% 12. TYPE OF REPORTING PERSON IA, CO 1. NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS Deutsche Bank Trust Company Americas 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (A) [ ] (B) [ ] 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware NUMBER OF 5. SOLE VOTING POWER SHARES 1,230 BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 2,500 EACH 7. SOLE DISPOSITIVE POWER REPORTING 20,125 PERSON WITH 8. SHARED DISPOSITIVE POWER 24,650 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 47,275 10.CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES [ ] 11.PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0.04% 12. TYPE OF REPORTING PERSON BK, CO 1. NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS Deutsche Investment Management Company Americas 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (A) [ ] (B) [ ] 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware NUMBER OF 5. SOLE VOTING POWER SHARES 2,885 BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 0 EACH 7. SOLE DISPOSITIVE POWER REPORTING 44,457 PERSON WITH 8. SHARED DISPOSITIVE POWER 12,900 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 57,357 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES [ ] 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0.05% 12. TYPE OF REPORTING PERSON IA, CO 1. NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS Deutsche Asset Management Inc. 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (A) [ ] (B) [ ] 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware NUMBER OF 5. SOLE VOTING POWER SHARES 10,000 BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 0 EACH 7. SOLE DISPOSITIVE POWER REPORTING 17,100 PERSON WITH 8. SHARED DISPOSITIVE POWER 0 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 17,100 10.CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES [ ] 11.PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0.01% 12. TYPE OF REPORTING PERSON IA, CO 1. NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS DWS Holding & Service GmbH 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (A) [ ] (B) [ ] 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION Germany NUMBER OF 5. SOLE VOTING POWER SHARES 10,000 BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 0 EACH 7. SOLE DISPOSITIVE POWER REPORTING 10,000 PERSON WITH 8. SHARED DISPOSITIVE POWER 0 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 10,000 10.CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES [ ] 11.PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0.01% 12. TYPE OF REPORTING PERSON IA, CO Item 1(a). Name of Issuer: Boston Properties Inc. (the "Issuer") Item 1(b). Address of Issuer's Principal Executive Offices: 111 HUNTINGTON AVEUE BOSTON MA 02199 Item 2(a). Name of Person Filing: This statement is filed on behalf of Deutsche Bank AG, ("Reporting Person"). Item 2(b). Address of Principal Business Office or, if none, Residence: Taunusanlage 12, D-60325 Frankfurt am Main Federal Republic of Germany Item 2(c). Citizenship: The citizenship of the Reporting Person is set forth on the cover page. Item 2(d). Title of Class of Securities: The title of the securities is common stock, ("Common Stock"). Item 2(e). CUSIP Number: The CUSIP number of the Common Stock is set forth on the cover page. Item 3. If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b) or (c), check whether the person filing is a: (a) [ ] Broker or dealer registered under section 15 of the Act; (b) [X] Bank as defined in section 3(a)(6) of the Act; Deutsche Bank Trust Corp. Americas (c) [ ] Insurance Company as defined in section 3(a)(19) of the Act; (d) [ ] Investment Company registered under section 8 of the Investment Company Act of 1940; (e) [X] An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E); Deutsche Investment Management Company Americas RREEF America, L.L.C. DWS Holding & Service GmbH Deutsche Asset Management Inc. (f) [ ] An employee benefit plan, or endowment fund in accordance with Rule 13d-1 (b)(1)(ii)(F); (g) [X] parent holding company or control person in accordance with Rule 13d-1 (b)(1)(ii)(G); Deutsche Bank AG (h) [ ] A savings association as defined in section 3(b) of the Federal Deposit Insurance Act; (i) [ ] A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940; (j) [ ] Group, in accordance with Rule 13d-1 (b)(1)(ii)(J). Item 4. Ownership. (a) Amount beneficially owned: The Reporting Person owns the amount of the Common Stock as set forth on the cover page. (b) Percent of class: The Reporting Person owns the percentage of the Common Stock as set forth on the cover page. (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote: The Reporting Person has the sole power to vote or direct the vote of the Common Stock as set forth on the cover page. (ii) shared power to vote or to direct the vote: The Reporting Person has the shared power to vote or direct the vote of the Common Stock as set forth on the cover page. (iii) sole power to dispose or to direct the disposition of: The Reporting Person has the sole power to dispose or direct the disposition of the Common Stock as set forth on the cover page. (iv) shared power to dispose or to direct the disposition of: The Reporting Person has the shared power to dispose or direct the disposition of the Common Stock as set forth on the cover page. Item 5. Ownership of Five Percent or Less of a Class. Not applicable Item 6. Ownership of More than Five Percent on Behalf of Another Person. Not applicable. Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company. Deutsche Investment Management Americas,Inc. Investment Advisor RREEF America, L.L.C. Investment Advisor Deutsche Bank Trust Corp. Americas Bank DWS Holding & Service GmbH Investment Advisor Deutsche Asset Management Inc. Investment Advisor Item 8. Identification and Classification of Members of the Group. Not applicable. Item 9. Notice of Dissolution of Group. Not applicable. Item 10. Certification. By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: 2/06/06 DEUTSCHE BANK AG By: /s/ Jeffrey A. Ruiz Name: Jeffrey A. Ruiz Title: Vice President By: /s/ Pasquale Antolino Name: Pasquale Antolino Title: Associate

SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: 2/06/06 Deutsche Investment Management Americas Inc. By: /s/ Jeffrey A. Ruiz Name: Jeffrey A. Ruiz Title: Vice President

SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: 2/06/06 Deutsche Bank Trust Corp. Americas By: /s/ Jeffrey A. Ruiz Name: Jeffrey A. Ruiz Title: Vice President

SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: 2/06/06 RREEF America, L.L.C. By: /s/ Peter Pages Name: Peter Pages Title: Vice President

SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: 2/06/06 DWS Holding & Service GmbH By: /s/ Susan Seidel Name: Susan Seidel Title: Vice President

SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: 2/06/06 Deutsche Asset Management Inc. By: /s/ Jeffrey A. Ruiz Name: Jeffrey A. Ruiz Title: Vice President