CABOT CORP — Director's Dealing 2017

Feb 22, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CABOT CORP (CBT)
CIK: 0000016040
Period of Report: 2017-02-17

Reporting Person: Prevost Patrick M. (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-02-17	Common Stock	M	40328	$55.37	Acquired	293548	Direct
2017-02-17	Common Stock	D	12139	$55.37	Disposed	281409	Direct
2017-02-21	Common Stock	M	92562	$34.64	Acquired	373971	Direct
2017-02-21	Common Stock	S	92562	$58.22	Disposed	281409	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-02-17	Phantom Stock	$	M	40328	Acquired	2017-02-17	Common Stock (40328)	Direct
2017-02-21	Employee Stock Option (Right to Buy)	$34.64	M	92562	Disposed	2019-10-15	Common Stock (92562)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	50.02	Indirect

Footnotes

F1: The price reported is the closing price of Cabot stock as of January 31, 2017, the date the phantom stock was valued for settlement under the terms of the Supplemental 401(k) Plan.

F2: The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from 58.15 to $58.74, 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.

F3: Reflects retirement plan contributions by the Corporation.

F4: 1 for 1

F5: 92,562 shares were subject to the option. The option vested over a three year period as follows: 30% November 12, 2011, 30% November 12, 2012 and 40% on November 12, 2013.