CABOT CORP — Director's Dealing 2009

Nov 17, 2009

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CABOT CORP (CBT)
CIK: 0000016040
Period of Report: 2009-11-13

Reporting Person: BERUBE BRIAN A (Vice President,General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2009-11-13	Common Stock	A	5900	$0.00	Acquired	71201	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2009-11-13	Employee Stock Option (Right to Buy)	$23.15	A	25200	Acquired	2019-11-12	Common Stock (25200)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	9276.0827	Indirect

Footnotes

F1: Reflects retirement plan contributions by the Corporation, including contributions that have occurred since the date of the reporting person's last ownership report.

F2: The option vests over a three year period as follows: 30% on November 13, 2010, 30% on November 13, 2011 and 40% on November 13, 2012.