<SEC-DOCUMENT>0001418812-18-000073-index.html : 20180809
<SEC-HEADER>0001418812-18-000073.hdr.sgml : 20180809
<ACCEPTANCE-DATETIME>20180809172555
ACCESSION NUMBER:		0001418812-18-000073
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180807
FILED AS OF DATE:		20180809
DATE AS OF CHANGE:		20180809

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ValueAct Holdings, L.P.
		CENTRAL INDEX KEY:			0001418814
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-02116
		FILM NUMBER:		181006423

	BUSINESS ADDRESS:	
		STREET 1:		ONE LETTERMAN DRIVE
		STREET 2:		BUILDING D, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94129
		BUSINESS PHONE:		415-362-3700

	MAIL ADDRESS:	
		STREET 1:		ONE LETTERMAN DRIVE
		STREET 2:		BUILDING D, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94129

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ValueAct Capital Master Fund, L.P.
		CENTRAL INDEX KEY:			0001464912
		STATE OF INCORPORATION:			D8
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-02116
		FILM NUMBER:		181006425

	BUSINESS ADDRESS:	
		STREET 1:		ONE LETTERMAN DRIVE
		STREET 2:		BUILDING D, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94129
		BUSINESS PHONE:		415-362-3700

	MAIL ADDRESS:	
		STREET 1:		ONE LETTERMAN DRIVE
		STREET 2:		BUILDING D, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94129

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VA Partners I, LLC
		CENTRAL INDEX KEY:			0001418812
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-02116
		FILM NUMBER:		181006426

	BUSINESS ADDRESS:	
		STREET 1:		ONE LETTERMAN DRIVE
		STREET 2:		BUILDING D, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94129
		BUSINESS PHONE:		415-362-3700

	MAIL ADDRESS:	
		STREET 1:		ONE LETTERMAN DRIVE
		STREET 2:		BUILDING D, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94129

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ValueAct Capital Management, L.P.
		CENTRAL INDEX KEY:			0001351069
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-02116
		FILM NUMBER:		181006427

	BUSINESS ADDRESS:	
		STREET 1:		ONE LETTERMAN DRIVE
		STREET 2:		BUILDING D, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94129
		BUSINESS PHONE:		415-362-3700

	MAIL ADDRESS:	
		STREET 1:		ONE LETTERMAN DRIVE
		STREET 2:		BUILDING D, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94129

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ValueAct Capital Management, LLC
		CENTRAL INDEX KEY:			0001351073
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-02116
		FILM NUMBER:		181006428

	BUSINESS ADDRESS:	
		STREET 1:		ONE LETTERMAN DRIVE
		STREET 2:		BUILDING D, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94129
		BUSINESS PHONE:		415-362-3700

	MAIL ADDRESS:	
		STREET 1:		ONE LETTERMAN DRIVE
		STREET 2:		BUILDING D, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94129

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ValueAct Holdings GP, LLC
		CENTRAL INDEX KEY:			0001418813
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-02116
		FILM NUMBER:		181006429

	BUSINESS ADDRESS:	
		STREET 1:		ONE LETTERMAN DRIVE
		STREET 2:		BUILDING D, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94129
		BUSINESS PHONE:		415-362-3700

	MAIL ADDRESS:	
		STREET 1:		ONE LETTERMAN DRIVE
		STREET 2:		BUILDING D, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94129

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ARMSTRONG WORLD INDUSTRIES INC
		CENTRAL INDEX KEY:			0000007431
		STANDARD INDUSTRIAL CLASSIFICATION:	PLASTICS PRODUCTS, NEC [3089]
		IRS NUMBER:				230366390
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	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
</SEC-HEADER>
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