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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
1243739	A Brian Berube	C/O Cabot Corporation Two Seaport Lane, Suite 1300 Boston MA 02210	Svp, General Counsel	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	Acquisiton	2017-02-06	19,662	$35.25	66,735	No	4	M	Direct
Common Stock	Disposition	2017-02-06	19,662	$57.57	47,073	No	4	S	Direct
Common Stock	Acquisiton	2017-02-06	19,553	$32.95	66,626	No	4	M	Direct
Common Stock	Disposition	2017-02-06	19,553	$57.55	47,073	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	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	2017-02-06	19,662	$0.00	19,662	$35.25
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2017-02-06	19,553	$0.00	19,553	$32.95

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0		2022-11-08	No	4	M	Direct
0		2021-11-10	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	8,400	Indirect	Through the Trustee for the Corporation's 401(k) plan

Footnotes

The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $57.30 to $58.095, inclusive. The reporting person undertakes to provide to the staff of the Securities and Exchange Commission, the Corporation or any security holder of the Corporation, upon request, full information regarding the number of shares sold at each separate price.
The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $57.33 to $57.810, inclusive. The reporting person undertakes to provide to the staff of the Securities and Exchange Commission, the Corporation or any security holder of the Corporation, upon request, full information regarding the number of shares sold at each separate price.
Reflects retirement plan contributions by the Corporation, including contributions that have occurred since the date of the reporting person's last ownership report.
19,662 shares were subject to the option. The option vested over a three year period as follows: 30% on November 9, 2013, 30% on November 9, 2014 and 40% on November 9, 2015.
19,553 shares were subject to the option. The option vested over a three year period as follows: 30% on November 11, 2012, 30% on November 11, 2013 and 40% on November 11, 2014.