<SEC-DOCUMENT>0001193125-17-210231-index.html : 20170622
<SEC-HEADER>0001193125-17-210231.hdr.sgml : 20170622
<ACCEPTANCE-DATETIME>20170622141506
ACCESSION NUMBER:		0001193125-17-210231
CONFORMED SUBMISSION TYPE:	11-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20161231
FILED AS OF DATE:		20170622
DATE AS OF CHANGE:		20170622

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CABOT CORP
		CENTRAL INDEX KEY:			0000016040
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS CHEMICAL PRODUCTS [2890]
		IRS NUMBER:				042271897
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0939

	FILING VALUES:
		FORM TYPE:		11-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-05667
		FILM NUMBER:		17924819

	BUSINESS ADDRESS:	
		STREET 1:		TWO SEAPORT LANE SUITE 1300
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02210
		BUSINESS PHONE:		6173450100

	MAIL ADDRESS:	
		STREET 1:		TWO SEAPORT LANE SUITE 1300
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02210

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CABOT GODFREY L INC
		DATE OF NAME CHANGE:	19680418
</SEC-HEADER>
<DOCUMENT>
<TYPE>11-K
<SEQUENCE>1
<FILENAME>d413935d11k.htm
<DESCRIPTION>FORM 11-K
<TEXT>
Document 1 - file: d413935d11k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>2
<FILENAME>d413935dex231.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 2 - file: d413935dex231.htm

</DOCUMENT>
</SEC-DOCUMENT>