CABOT CORP — Director's Dealing 2012

Feb 6, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CABOT CORP (CBT)
CIK: 0000016040
Period of Report: 2012-02-02

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-02	Common Stock	M	13500	$16.90	Acquired	53175	Direct
2012-02-02	Common Stock	S	13500	$40.00	Disposed	39675	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-02-02	Employee Stock Option (Right to Buy)	$16.90	M	13500	Disposed	2019-05-06	Common Stock (13500)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	11977.1688	Indirect

Footnotes

F1: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 21, 2011.

F2: Reflects retirement plan contributions by the Corporation, including contributions that have occurred since the date of the reporting person's last ownership report.

F3: 45,000 shares are subject to the option. 13,500 shares vested on May 7, 2010, 13,500 shares vested on May 7, 2011 and 18,000 shares will vest on May 7, 2012.