<SEC-DOCUMENT>0001348883-21-000021-index.html : 20210211
<SEC-HEADER>0001348883-21-000021.hdr.sgml : 20210211
<ACCEPTANCE-DATETIME>20210211113202
ACCESSION NUMBER:		0001348883-21-000021
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210211
DATE AS OF CHANGE:		20210211

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:			0103

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-43863
		FILM NUMBER:		21617698

	BUSINESS ADDRESS:	
		STREET 1:		1242 EAST 5TH AVENUE
		CITY:			TAMPA
		STATE:			FL
		ZIP:			33605
		BUSINESS PHONE:		813-877-2726

	MAIL ADDRESS:	
		STREET 1:		1242 EAST 5TH AVENUE
		CITY:			TAMPA
		STATE:			FL
		ZIP:			33605

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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Clearbridge Investments, LLC
		CENTRAL INDEX KEY:			0001348883
		IRS NUMBER:				010846058

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		620 8TH AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10018
		BUSINESS PHONE:		800-691-6959

	MAIL ADDRESS:	
		STREET 1:		620 8TH AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10018

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Clearbridge Advisors, LLC
		DATE OF NAME CHANGE:	20061012

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CAM North America, LLC
		DATE OF NAME CHANGE:	20060105
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>maso20a3.htm
<TEXT>
Document 1 - file: maso20a3.htm

</DOCUMENT>
</SEC-DOCUMENT>