<SEC-DOCUMENT>0001102934-18-000006-index.html : 20180306
<SEC-HEADER>0001102934-18-000006.hdr.sgml : 20180306
<ACCEPTANCE-DATETIME>20180305201629
ACCESSION NUMBER:		0001102934-18-000006
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20180305
ITEM INFORMATION:		Regulation FD Disclosure
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20180306
DATE AS OF CHANGE:		20180305

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CABOT MICROELECTRONICS CORP
		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:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-30205
		FILM NUMBER:		18668369

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>cmc8kfiled030518.htm
<DESCRIPTION>CMC 8-K FILED 03-05-18
<TEXT>
Document 1 - file: cmc8kfiled030518.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>exhibit99_1.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
Document 2 - file: exhibit99_1.htm

</DOCUMENT>
</SEC-DOCUMENT>