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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
16040	Cabot Corp	CBT	Miscellaneous Chemical Products (2890)	042271897

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1472249	A David Miller	C/O Cabot Corporation Two Seaport Lane, Suite 1300 Boston MA 02210	Executive Vice President	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Disposition	2014-11-11	3,434	$47.05	25,175	No	4	F	Direct
Common Stock	Acquisiton	2014-11-13	8,000	$21.07	33,175	No	4	M	Direct
Common Stock	Disposition	2014-11-13	8,000	$47.19	25,175	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	F	Direct
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2014-11-13	8,000	$0.00	8,000	$21.07

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
37,000		2019-09-13	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	4,687	Indirect	Through the Trustees of the Corporation's 401(k) Plan

Footnotes

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 13, 2014.
Reflects retirement plan contributions by the Corporation, including contributions that have occurred since the date of the reporting person's last ownership report.
45,000 shares were subject to the option. The option vested over a three year period as follows: 30% on September 14, 2010, 30% on September 14, 2011 and 40% on September 14, 2012.