<SEC-DOCUMENT>0001102934-21-000024-index.html : 20210506
<SEC-HEADER>0001102934-21-000024.hdr.sgml : 20210506
<ACCEPTANCE-DATETIME>20210506125544
ACCESSION NUMBER:		0001102934-21-000024
CONFORMED SUBMISSION TYPE:	S-8 POS
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20210506
DATE AS OF CHANGE:		20210506
EFFECTIVENESS DATE:		20210506

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CMC Materials, Inc.
		CENTRAL INDEX KEY:			0001102934
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				364324765
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		S-8 POS
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-179955
		FILM NUMBER:		21896828

	BUSINESS ADDRESS:	
		STREET 1:		870 NORTH COMMONS DRIVE
		CITY:			AURORA
		STATE:			IL
		ZIP:			60504
		BUSINESS PHONE:		6303755461

	MAIL ADDRESS:	
		STREET 1:		870 N COMMONS DR
		CITY:			AURORA
		STATE:			IL
		ZIP:			60504

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CABOT MICROELECTRONICS CORP
		DATE OF NAME CHANGE:	20000110
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-8 POS
<SEQUENCE>1
<FILENAME>ccmp-20210506sx8pos.htm
<DESCRIPTION>S-8 POS
<TEXT>
Document 1 - file: ccmp-20210506sx8pos.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.2
<SEQUENCE>2
<FILENAME>exhibit52opinionpos.htm
<DESCRIPTION>EX-5.2
<TEXT>
Document 2 - file: exhibit52opinionpos.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>3
<FILENAME>exhibit231consentpos.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 3 - file: exhibit231consentpos.htm

</DOCUMENT>
</SEC-DOCUMENT>