<SEC-DOCUMENT>0001193125-18-017376-index.html : 20180123
<SEC-HEADER>0001193125-18-017376.hdr.sgml : 20180123
<ACCEPTANCE-DATETIME>20180123161011
ACCESSION NUMBER:		0001193125-18-017376
CONFORMED SUBMISSION TYPE:	DEF 14A
PUBLIC DOCUMENT COUNT:		14
CONFORMED PERIOD OF REPORT:	20180306
FILED AS OF DATE:		20180123
DATE AS OF CHANGE:		20180123
EFFECTIVENESS DATE:		20180123

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:		DEF 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-30205
		FILM NUMBER:		18542495

	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>DEF 14A
<SEQUENCE>1
<FILENAME>d462833ddef14a.htm
<DESCRIPTION>DEF 14A
<TEXT>
Document 1 - file: d462833ddef14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g462833g01b58.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g462833g01b58.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g462833g01g01a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g462833g01g01a.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g462833g01g02a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g462833g01g02a.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g462833g01g03a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g462833g01g03a.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g462833g01g04a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g462833g01g04a.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g462833g05y41.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g462833g05y41.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g462833g06f44.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: g462833g06f44.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>g462833g10r60a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: g462833g10r60a.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>g462833g21m36.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 10 - file: g462833g21m36.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>g462833g31x04.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 11 - file: g462833g31x04.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>g462833g36c11.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 12 - file: g462833g36c11.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>g462833prx1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 13 - file: g462833prx1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>g462833prx2.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 14 - file: g462833prx2.jpg

</DOCUMENT>
</SEC-DOCUMENT>