Ownership Submission
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 *
Centerbridge Credit GP Investors, L.L.C.
  2. Issuer Name and Ticker or Trading Symbol
MASONITE INTERNATIONAL CORP [DOOR]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
375 PARK AVENUE, 12TH FLOOR
3. Date of Earliest Transaction (Month/Day/Year)
09/10/2013
(Street)

NEW YORK, NY 10152
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ 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 09/10/2013   S   3,638 D $ 51 1,026,690 I See footnotes (1) (4) (5) (6)
Common Shares 09/10/2013   S   6,550 D $ 51 1,848,551 I See footnotes (2) (4) (5) (6)
Common Shares 09/10/2013   S   2,312 D $ 51 652,708 I See footnotes (3) (4) (5) (6)
Common Shares 09/17/2013   S   203,712 D $ 50.2857 822,978 I See footnotes (1) (4) (5) (6)
Common Shares 09/17/2013   S   366,781 D $ 50.2857 1,481,770 I See footnotes (2) (4) (5) (6)
Common Shares 09/17/2013   S   129,507 D $ 50.2857 523,201 I See footnotes (3) (4) (5) (6)
Common Shares 09/18/2013   S   87,305 D $ 51.25 735,673 I See footnotes (1) (4) (5) (6)
Common Shares 09/18/2013   S   157,192 D $ 51.25 1,324,578 I See footnotes (2) (4) (5) (6)
Common Shares 09/18/2013   S   55,503 D $ 51.25 467,698 I See footnotes (3) (4) (5) (6)

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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
Centerbridge Credit GP Investors, L.L.C.
375 PARK AVENUE
12TH FLOOR
NEW YORK, NY 10152
    X    
Centerbridge Credit Partners, L.P.
375 PARK AVENUE
12TH FLOOR
NEW YORK, NY 10152
    X    
Centerbridge Credit Partners General Partner, L.P.
375 PARK AVENUE, 12TH FLOOR
NEW YORK, NY 10152
    X    
Centerbridge Credit Partners Master, L.P.
375 PARK AVENUE
12TH FLOOR
NEW YORK, NY 10152
    X    
Centerbridge Credit Partners Offshore General Partner, L.P.
375 PARK AVENUE, 12TH FLOOR
NEW YORK, NY 10152
    X    
Centerbridge Credit Offshore GP Investors, L.L.C.
375 PARK AVENUE, 12TH FLOOR
NEW YORK, NY 10152
    X    
Gallogly Mark T
375 PARK AVENUE, 12TH FLOOR
NEW YORK, NY 10152
    X    
Aronson Jeffrey
375 PARK AVENUE, 12TH FLOOR
NEW YORK, NY 10152
    X    

Signatures

 Centerbridge Credit Partners, L.P., By: Centerbridge Credit Partners General Partner, L.P., its general partner, By: Centerbridge Credit GP Investors, L.L.C., its general partner, By: /s/ Mark T. Gallogly, Authorized Signatory   09/30/2013
**Signature of Reporting Person Date

 Centerbridge Credit Partners General Partner, L.P., By: Centerbridge Credit GP Investors, L.L.C., its general partner, By: /s/ Mark T. Gallogly, Authorized Signatory   09/30/2013
**Signature of Reporting Person Date

 Centerbridge Credit GP Investors, L.L.C., By: /s/ Mark T. Gallogly, Authorized Signatory   09/30/2013
**Signature of Reporting Person Date

 Centerbridge Credit Partners Master, L.P., By: Centerbridge Credit Partners Offshore General Partner, L.P., its general partner, By: Centerbridge Credit Offshore GP Investors, L.L.C., its general partner, By: /s/ Mark T. Gallogly, Authorized Signatory   09/30/2013
**Signature of Reporting Person Date

 Centerbridge Credit Partners Offshore General Partner, L.P., By: Centerbridge Credit Offshore GP Investors, L.L.C., its general partner, By: /s/ Mark T. Gallogly, Authorized Signatory   09/30/2013
**Signature of Reporting Person Date

 Centerbridge Credit Offshore GP Investors, L.L.C., By: /s/ Mark T. Gallogly, Authorized Signatory   09/30/2013
**Signature of Reporting Person Date

 By: /s/ Mark T. Gallogly   09/30/2013
**Signature of Reporting Person Date

 By: /s/ Jeffrey H. Aronson   09/30/2013
**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 Common Shares are held by Centerbridge Credit Partners, L.P. ("Credit Partners").
(2) These Common Shares are held by Centerbridge Credit Partners Master, L.P. ("Credit Partners Master").
(3) These Common Shares are held by Centerbridge Special Credit Partners, L.P. ("Special Credit Partners" and, together with Credit Partners and Credit Partners Master, the "Centerbridge Funds").
(4) Centerbridge Credit GP Investors, L.L.C. ("GP Investors") is the general partner of Centerbridge Credit Partners General Partner, L.P. ("Credit GP"), which, in turn, is the general partner of Centerbridge Credit Partners, L.P., and, as such GP Investors and Credit GP may be deemed to beneficially own the securities held by Credit Partners. Centerbridge Credit Offshore GP Investors, L.L.C. ("Offshore GP Investors") is the general partner of Centerbridge Credit Partners Offshore General Partner, L.P. ("Offshore GP"), which, in turn, is the general partner of Centerbridge Credit Partners Master, L.P., and, as such Offshore GP Investors and Offshore GP may be deemed to beneficially own the securities held by Credit Partners Master. (Continued in footnote 5)
(5) Centerbridge Special GP Investors, L.L.C. ("SC GP Investors") is the general partner of Centerbridge Special Credit Partners General Partner, L.P. ("SC GP"), which, in turn, is the general partner of Centerbridge Special Credit Partners, L.P., and, as such SC GP Investors and SC GP may be deemed to beneficially own the securities held by Special Credit Partners. Messrs. Gallogy and Aronson are the managing members of each of GP Investors, Offshore GP Investors and SC GP Investors, and, as such may be deemed to beneficially own the securities held by the Centerbridge Funds. Except for the Centerbridge Funds with respect to the securities held by such entity, each of the Reporting Persons disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein. (Continued in footnote 6)
(6) The filing of this statement by the Reporting Persons shall not be deemed to be an admission that, for purposes of Section 16 of the Securities Exchange Act of 1934 or otherwise, such Reporting Persons are the beneficial owners of the securities reported herein other than the securities held directly by such Reporting Person.
 
Remarks:
Due to the limitations of the Securities and Exchange Commission's EDGAR system, Special Credit Partners, SC GP and SC GP Investors have filed a separate Form 4.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.