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 * SWEENEY GERARD H   2. Issuer Name and Ticker or Trading Symbol BRANDYWINE REALTY TRUST [BDN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President and CEO (Last) (First) (Middle) 555 EAST LANCASTER AVENUE, SUITE 100 3. Date of Earliest Transaction (Month/Day/Year) 01/15/2010 (Street) RADNOR, PA 19087 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 Shares of Beneficial Interest (1) (2) 01/15/2010   F   1,453 D $ 11.44 703,570 D   Common Shares of Beneficial Interest (3)               190,759 I Family Limited Partnership Series D Cumulative Redeemable Preferred Shares (4)               1,500 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
SWEENEY GERARD H 555 EAST LANCASTER AVENUE SUITE 100 RADNOR, PA 19087	X		President and CEO

Signatures

/s/ Gerard H. Sweeney		01/20/2010
**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)	Shares redeemed to satisfy payroll taxes for performance shares vesting on January 15, 2010.
(2)	This Form 4 filing also reports in the ending balance of shares owned the acquisition of 229 common shares acquired under the Company's Dividend Reinvestment Plan (DRIP). The shares were executed at the following prices and amounts: 39.105387 shares acquired on April 17, 2009, at a transaction price of $4.7909 per share; 110.766343 shares acquired on July 17, 2009, at a transaction price of $7.2996 per share; and 79.244699 shares acquired on October 19, 2009, at a transaction price of $10.3429 per share. The DRIP provides for the purchase of fractional shares. The number reported in the ending balance of shares owned is the nearest whole number.
(3)	There was no indirect transaction on the above date. The indirect ownership is being disclosed for informational purposes only.
(4)	There was no Series D transaction on the above date. The Series D ownership is being disclosed for informational purposes only.

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