--------------------------------- OMB APPROVAL --------------------------------- OMB Number: 3235-0145 Expires: February 28, 2009 Estimated average burden hours per response...........10.4 --------------------------------- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.1)* BRANDYWINE REALTY TRUST ----------------------------------------------------- (Name of Issuer) Common Stock ----------------------------------------------------- (Title of Class of Securities) 105368203 ----------------------------------------------------- (CUSIP Number) DECEMBER 31, 2006 ----------------------------------------------------- (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) *The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. SEC 1745 (3-06) CUSIP No.105368203 13G Page 2 of 9 Pages -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSON: I.R.S. IDENTIFICATION NO. OF ABOVE PERSON: Morgan Stanley I.R.S. #36-3145972 -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP: (a) [ ] (b) [ ] -------------------------------------------------------------------------------- 3. SEC USE ONLY: -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION: The state of organization is Delaware. -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER: SHARES 6,287,547 BENEFICIALLY -------------------------------------------------------------- OWNED BY 6. SHARED VOTING POWER: EACH 1,304 REPORTING -------------------------------------------------------------- PERSON 7. SOLE DISPOSITIVE POWER: WITH: 6,287,547 -------------------------------------------------------------- 8. SHARED DISPOSITIVE POWER: 1,304 -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON: 9,067,572 -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES: [ ] -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9): 10.3% -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON: HC, CO -------------------------------------------------------------------------------- CUSIP No.105368203 13G Page 3 of 9 Pages -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSON: I.R.S. IDENTIFICATION NO. OF ABOVE PERSON: Morgan Stanley Investment Management Inc. I.R.S. #13-3040307 -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP: (a) [ ] (b) [ ] -------------------------------------------------------------------------------- 3. SEC USE ONLY: -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION: The state of organization is Delaware. -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER: SHARES 5,123,418 BENEFICIALLY -------------------------------------------------------------- OWNED BY 6. SHARED VOTING POWER: EACH 0 REPORTING -------------------------------------------------------------- PERSON 7. SOLE DISPOSITIVE POWER: WITH: 5,123,418 -------------------------------------------------------------- 8. SHARED DISPOSITIVE POWER: 0 -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON: 7,025,807 -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES: [ ] -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9): 8.0% -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON: IA, CO -------------------------------------------------------------------------------- CUSIP No.105368203 13G Page 4 of 9 Pages Item 1. (a) Name of Issuer: BRANDYWINE REALTY TRUST -------------------------------------------------------------- (b) Address of Issuer's Principal Executive Offices: 14 CAMPUS BLVD STE 100 NEWTOWN SQUARE, PA 19073 -------------------------------------------------------------- Item 2. (a) Name of Person Filing: (1) Morgan Stanley (2) Morgan Stanley Investment Management Inc. -------------------------------------------------------------- (b) Address of Principal Business Office, or if None, Residence: (1) 1585 Broadway New York, NY 10036 (2) 1221 Avenue of the Americas New York, NY 10020 -------------------------------------------------------------- (c) Citizenship: (1) The state of organization is Delaware. (2) The state of organization is Delaware. -------------------------------------------------------------- (d) Title of Class of Securities: Common Stock -------------------------------------------------------------- (e) CUSIP Number: 105368203 -------------------------------------------------------------- Item 3. If this statement is filed pursuant to Sections 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a: (a) [ ] Broker or dealer registered under Section 15 of the Act (15 U.S.C. 78o). (b) [ ] Bank as defined in Section 3(a)(6) of the Act (15 U.S.C. 78c). (c) [ ] Insurance company as defined in Section 3(a)(19) of the Act (15 U.S.C. 78c). (d) [ ] Investment company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8). (e) [x] An investment adviser in accordance with Section 240.13d-1(b)(1)(ii)(E); Morgan Stanley Investment Management Inc. (f) [ ] An employee benefit plan or endowment fund in accordance with Section 240.13d-1(b)(1)(ii)(F); (g) [x] A parent holding company or control person in accordance with Section 240.13d-1(b)(1)(ii)(G); Morgan Stanley (h) [ ] A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813); (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 (15 U.S.C. 80a-3); (j) [ ] Group, in accordance with Section 13d-1(b)(1)(ii)(J). CUSIP No.105368203 13-G Page 5 of 9 Pages Item 4. Ownership as of December 31, 2006. (a) Amount beneficially owned: See the response(s) to Item 9 on the attached cover page(s). (b) Percent of Class: See the response(s) to Item 11 on the attached cover page(s). (c) Number of shares as to which such person has: (i) Sole power to vote or to direct the vote: See the response(s) to Item 5 on the attached cover page(s). (ii) Shared power to vote or to direct the vote: See the response(s) to Item 6 on the attached cover page(s). (iii) Sole power to dispose or to direct the disposition of: See the response(s) to Item 7 on the attached cover page(s). (iv) Shared power to dispose or to direct the disposition of: See the response(s) to Item 8 on the attached cover page(s). 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. Accounts managed on a discretionary basis by Morgan Stanley Investment Management Inc., a wholly owned subsidiary of Morgan Stanley, are known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of such securities. Item 7. Identification and Classification of the Subsidiary which Acquired the Security Being Reported on By the Parent Holding Company. See Exhibit 99.3 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. CUSIP No.105368203 13-G Page 6 of 9 Pages 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. Date: JANUARY 10, 2007 Signature: /s/ Dennine Bullard -------------------------------------------------------------------- Name/Title: Dennine Bullard/Executive Director, Morgan Stanley & Co. Incorporated -------------------------------------------------------------------- MORGAN STANLEY Date: JANUARY 10, 2007 Signature: /s/ Carsten Otto -------------------------------------------------------------------- Name/Title: Carsten Otto/Managing Director, Morgan Stanley Investment Management Inc. -------------------------------------------------------------------- Morgan Stanley Investment Management Inc. EXHIBIT NO. EXHIBITS PAGE ----------- ---------- ---- 99.1 Joint Filing Agreement 7 99.2 Secretary's Certificate Authorizing Dennine Bullard 8 to Sign on behalf of Morgan Stanley 99.3 Item 7 Information 9 * Attention. Intentional misstatements or omissions of fact constitute federal criminal violations (see 18 U.S.C. 1001). CUSIP No.105368203 13-G Page 7 of 9 Pages EXHIBIT NO. 99.1 TO SCHEDULE 13G JOINT FILING AGREEMENT --------------------------------------------------- JANUARY 10, 2007 --------------------------------------------------- MORGAN STANLEY and MORGAN STANLEY INVESTMENT MANAGEMENT INC., hereby agree that, unless differentiated, this Schedule 13G is filed on behalf of each of the parties. MORGAN STANLEY BY: /s/ Dennine Bullard --------------------------------------------------------------------- Dennine Bullard/Executive Director, Morgan Stanley & Co. Incorporated MORGAN STANLEY INVESTMENT MANAGEMENT INC. BY: /s/ Carsten Otto --------------------------------------------------------------------- Carsten Otto/Managing Director, Morgan Stanley Investment Management Inc. * Attention. Intentional misstatements or omissions of fact constitute federal criminal violations (see 18 U.S.C. 1001). CUSIP No.105368203 13-G Page 8 of 9 Pages EXHIBIT NO. 99.2 ------------------ MORGAN STANLEY SECRETARY'S CERTIFICATE I, Charlene R. Herzer, a duly elected and acting Assistant Secretary of Morgan Stanley, a corporation organized and existing under the laws of the State of Delaware (the "Corporation"), certify as follows: (1) Gary G. Lynch is the duly elected Executive Vice President, Chief Legal Officer and Secretary of the Corporation; (2) Pursuant to Section 7.01 of the Bylaws of the Corporation and resolutions approved by the Board of Directors of the Corporation on September 25, 1998, the Chief Legal Officer is authorized to enter into agreements and other instruments on behalf of the Corporation and may delegate such powers to others under his jurisdiction; and (3) Mr. Lynch signed a Delegation of Authority, dated as of April 7, 2006, which authorized Stuart J. M. Breslow, Dennine Bullard, John H. Faulkner, Christopher L. O'Dell and Jill W. Ostergaard to sign reports to be filed under Section 13 and 16 of the Securities Exchange Act of 1934 on behalf of the Corporation. Such authorization is in full force and effect as of this date IN WITNESS WHEREOF, I have hereunto set my name and affixed the seal of the Corporation as of the 10th day of July, 2006. ______________________________ Charlene R. Herzer Assistant Secretary CUSIP No.105368203 13-G Page 9 of 9 Pages EXHIBIT NO. 99.3 ------------------ ITEM 7 INFORMATION The securities being reported upon by Morgan Stanley as a parent holding company are owned, or may be deemed to be beneficially owned, by Morgan Stanley Investment Management Inc., an investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E) as amended. Morgan Stanley Investment Management Inc. is a wholly-owned subsidiary of Morgan Stanley.