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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1. Name and Address of Reporting Person * HYNES THOMAS J JR   2. Issuer Name and Ticker or Trading Symbol PRENTISS PROPERTIES TRUST/MD [PP] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) __X__ Other (specify below) Trustee (Last) (First) (Middle) 3890 WEST NORTHWEST HIGHWAY, SUITE 400 3. Date of Earliest Transaction (Month/Day/Year) 01/05/2006 (Street) DALLAS, TX 75220 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 01/05/2006   D   27,685 D (1) 0 D

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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

Stock Options

$ 31.35

01/05/2006

D

7,500

(2)

07/01/2012

Common Shares

7,500

(2)

0

D

Stock Options

$ 29.99

01/05/2006

D

7,500

(3)

07/01/2013

Common shares

7,500

(3)

0

D

Stock Options

$ 33.52

01/05/2006

D

7,500

(4)

07/01/2014

Common Shares

7,500

(4)

0

D

Stock Options

$ 36.44

01/05/2006

D

7,500

(5)

07/01/2015

Common Shares

7,500

(5)

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
HYNES THOMAS J JR 3890 WEST NORTHWEST HIGHWAY SUITE 400 DALLAS, TX 75220				Trustee

Signatures

Gregory S. Imhoff (POA on File) Thomas J. Hynes, Jr.		01/09/2006
**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)	These shares were held directly and will be exchanged for the merger consideration of $21.50 per share and 27,685 shares of BDN having a market value of $353,248 on the date of the merger.
(2)	This option, which vested when issued on July 1, 2004, was assumed by Brandywine in the merger and replaced with and option to purchase 10,857 common shares of beneficial interest of Brandywine for $21.6565 per common share.
(3)	This option, which vested when issued on on February 23, 2004, was assumed by Brandywine in the merger and replaced with and option to purchase 10,857 common shares of beneficial interest of Brandywine for $20.7170 per common share.
(4)	This option, which vested when issued on July 1, 2004, was assumed by Brandywine in the merger and replaced with and option to purchase 10,857 common shares of beneficial interest of Brandywine for $23.1556 per common share.
(5)	This option, which vested when issued on Julyy 1, 2004, was assumed by Brandywine in the merger and replaced with and option to purchase 10,857 common shares of beneficial interest of Brandywine for $25.1727 per common share.

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