CABOT CORP — Director's Dealing 2015

Feb 18, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CABOT CORP (CBT)
CIK: 0000016040
Period of Report: 2015-02-13

Reporting Person: Prevost Patrick M. (Director, President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-02-13	Common Stock	M	30000	$16.90	Acquired	306532	Direct
2015-02-13	Common Stock	S	30000	$47.0792	Disposed	276532	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-02-13	Employee Stock Option (Right to Buy)	$16.90	M	30000	Disposed	2019-05-06	Common Stock (30000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	7661.7561	Indirect

Footnotes

F1: The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $46.95 to $47.30, 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.

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: 300,000 shares were subject to the option. The option vested over a three year period as follows: 30% May 7, 2010, 30% May 7, 2011 and 40% on May 7, 2012.