<SEC-DOCUMENT>0002100121-26-000101-index.html : 20260428
<SEC-HEADER>0002100121-26-000101.hdr.sgml : 20260428
<ACCEPTANCE-DATETIME>20260428160805
ACCESSION NUMBER:		0002100121-26-000101
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20260428
DATE AS OF CHANGE:		20260428

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ARMSTRONG WORLD INDUSTRIES INC
		CENTRAL INDEX KEY:			0000007431
		STANDARD INDUSTRIAL CLASSIFICATION:	PLASTICS PRODUCTS, NEC [3089]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		EIN:				230366390
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-30703
		FILM NUMBER:		26907729

	BUSINESS ADDRESS:	
		STREET 1:		2500 COLUMBIA AVE
		CITY:			LANCASTER
		STATE:			PA
		ZIP:			17603
		BUSINESS PHONE:		7173970611

	MAIL ADDRESS:	
		STREET 1:		2500 COLUMBIA AVE
		CITY:			LANCASTER
		STATE:			PA
		ZIP:			17603

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ARMSTRONG CORK CO
		DATE OF NAME CHANGE:	19800611

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			VANGUARD PORTFOLIO MANAGEMENT LLC
		CENTRAL INDEX KEY:			0002100121
		ORGANIZATION NAME:           	
		EIN:				392888838
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231
		LEGAL ENTITY IDENTIFIER:    	529900YN99W7NU4H6B84

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G

	BUSINESS ADDRESS:	
		STREET 1:		100 VANGUARD BLVD
		CITY:			MALVERN
		STATE:			PA
		ZIP:			19355
		BUSINESS PHONE:		610-669-6148

	MAIL ADDRESS:	
		STREET 1:		100 VANGUARD BLVD
		CITY:			MALVERN
		STATE:			PA
		ZIP:			19355
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
</SEC-DOCUMENT>