<SEC-DOCUMENT>0001193125-21-122837-index.html : 20210420
<SEC-HEADER>0001193125-21-122837.hdr.sgml : 20210420
<ACCEPTANCE-DATETIME>20210420161907
ACCESSION NUMBER:		0001193125-21-122837
CONFORMED SUBMISSION TYPE:	DEF 14A
PUBLIC DOCUMENT COUNT:		4
CONFORMED PERIOD OF REPORT:	20210520
FILED AS OF DATE:		20210420
DATE AS OF CHANGE:		20210420

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Cornerstone Building Brands, Inc.
		CENTRAL INDEX KEY:			0000883902
		STANDARD INDUSTRIAL CLASSIFICATION:	PREFABRICATED METAL BUILDINGS & COMPONENTS [3448]
		IRS NUMBER:				760127701
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEF 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14315
		FILM NUMBER:		21838062

	BUSINESS ADDRESS:	
		STREET 1:		5020 WESTON PARKWAY
		STREET 2:		SUITE 400
		CITY:			CARY
		STATE:			NC
		ZIP:			27513
		BUSINESS PHONE:		(888) 975-9436

	MAIL ADDRESS:	
		STREET 1:		5020 WESTON PARKWAY
		STREET 2:		SUITE 400
		CITY:			CARY
		STATE:			NC
		ZIP:			27513

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NCI BUILDING SYSTEMS INC
		DATE OF NAME CHANGE:	19930328

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NATIONAL COMPONENTS INCORPORATED
		DATE OF NAME CHANGE:	19600201
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEF 14A
<SEQUENCE>1
<FILENAME>d52671ddef14a.htm
<DESCRIPTION>DEF 14A
<TEXT>
Document 1 - file: d52671ddef14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g526711.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g526711.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g526712.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g526712.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g52671g20e57.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g52671g20e57.jpg

</DOCUMENT>
</SEC-DOCUMENT>