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 * BUCK ROBERT R   2. Issuer Name and Ticker or Trading Symbol BEACON ROOFING SUPPLY INC [BECN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chairman (Last) (First) (Middle) ONE LAKELAND PARK DR. 3. Date of Earliest Transaction (Month/Day/Year) 11/30/2012 (Street) PEABODY, MA 01960 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 11/30/2012   M   40,000 A $ 22.46 106,317 D   Common Stock 11/30/2012   M   13,700 A $ 14.45 120,017 D   Common Stock 11/30/2012   M   5,342 A $ 15.47 125,359 D   Common Stock 11/30/2012   M   2,005 A $ 18.72 127,364 D   Common Stock 11/30/2012   S   61,047 D $ 30.6957 (1) 66,317 (3) 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 Option

$ 22.46

11/30/2012

M

40,000

10/24/2007(2)

10/06/2016

Common Stock

40,000

$ 0

0

D

Stock Option

$ 14.45

11/30/2012

M

13,700

11/06/2010(2)

11/06/2019

Common Stock

13,700

$ 0

0

D

Stock Option

$ 15.47

11/30/2012

M

5,342

11/16/2011(2)

11/16/2020

Common Stock

5,342

$ 0

2,671

D

Stock Option

$ 18.72

11/30/2012

M

2,005

11/18/2012(2)

11/18/2021

Common Stock

2,005

$ 0

4,008

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
BUCK ROBERT R ONE LAKELAND PARK DR. PEABODY, MA 01960	X		Chairman

Signatures

Robert R. Buck		12/03/2012
**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)	The sale price in Column 4 of Table 1 represents a weighted average sales price. Sales were made at prices ranging from $30.64 to $30.765. The undersigned undertakes to provide to the staff of the Securities and Exchange Commission, the issuer and any securityholder of the issuer upon request the number of shares sold at each separate price.
(2)	Option grant vested/vests in one-third increments over a three-year period following the grant date.
(3)	Includes 12,500 restricted shares previously reported.

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