<SEC-DOCUMENT>0001144204-15-007496-index.html : 20150210
<SEC-HEADER>0001144204-15-007496.hdr.sgml : 20150210
<ACCEPTANCE-DATETIME>20150210163811
ACCESSION NUMBER:		0001144204-15-007496
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20150210
DATE AS OF CHANGE:		20150210

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MASONITE INTERNATIONAL CORP
		CENTRAL INDEX KEY:			0000893691
		STANDARD INDUSTRIAL CLASSIFICATION:	MILLWOOD, VENEER, PLYWOOD & STRUCTURAL WOOD MEMBERS [2430]
		IRS NUMBER:				980377314
		STATE OF INCORPORATION:			A1
		FISCAL YEAR END:			1229

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-43863
		FILM NUMBER:		15594355

	BUSINESS ADDRESS:	
		STREET 1:		ONE TAMPA CITY CENTER
		STREET 2:		201 NORTH FRANKLIN STREET, SUITE 300
		CITY:			TAMPA
		STATE:			FL
		ZIP:			33602
		BUSINESS PHONE:		813-877-2726

	MAIL ADDRESS:	
		STREET 1:		ONE TAMPA CITY CENTER
		STREET 2:		201 NORTH FRANKLIN STREET, SUITE 300
		CITY:			TAMPA
		STATE:			FL
		ZIP:			33602

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PREMDOR INC
		DATE OF NAME CHANGE:	19941208

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GILDER GAGNON HOWE & CO LLC
		CENTRAL INDEX KEY:			0000902464
		IRS NUMBER:				133174112
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		3 COLUMBUS CIRCLE
		STREET 2:		26TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019
		BUSINESS PHONE:		2127652500

	MAIL ADDRESS:	
		STREET 1:		3 COLUMBUS CIRCLE
		STREET 2:		26TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GILDER GAGNON HOWE & CO
		DATE OF NAME CHANGE:	19930428
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>v400867_sc13ga.htm
<DESCRIPTION>SCHEDULE 13G/A
<TEXT>
Document 1 - file: v400867_sc13ga.htm

</DOCUMENT>
</SEC-DOCUMENT>