CABOT CORP — Director's Dealing 2012

Dec 20, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CABOT CORP (CBT)
CIK: 0000016040
Period of Report: 2012-12-18

Reporting Person: CORDEIRO EDUARDO E (Executive Vice President, CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-12-18	Common Stock	M	28000	$16.90	Acquired	100954	Direct
2012-12-18	Common Stock	S	28000	$40.00	Disposed	72954	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-12-18	Employee Stock Option (Right to Buy)	$16.90	M	28000	Disposed	2019-05-06	Common Stock (28000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	8182.32	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, 2012.

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: 70,000 shares are subject to the option. 21,000 shares vested on May 7, 2010, 21,000 shares vested on May 7, 2011 and 28,000 shares vested on May 7, 2012.