CABOT CORP — Director's Dealing 2017

Feb 8, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CABOT CORP (CBT)
CIK: 0000016040
Period of Report: 2017-02-06

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-02-06	Common Stock	M	14612	$35.25	Acquired	87929	Direct
2017-02-06	Common Stock	S	14612	$57.56	Disposed	73317	Direct
2017-02-06	Common Stock	M	8547	$39.54	Acquired	81864	Direct
2017-02-06	Common Stock	S	8547	$57.53	Disposed	73317	Direct
2017-02-07	Common Stock	M	13477	$35.25	Acquired	86794	Direct
2017-02-07	Common Stock	S	13477	$57.68	Disposed	73317	Direct
2017-02-07	Common Stock	M	1059	$39.54	Acquired	74376	Direct
2017-02-07	Common Stock	S	1059	$57.67	Disposed	73317	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-02-06	Employee Stock Option (Right to Buy)	$35.25	M	14612	Disposed	2022-11-08	Common Stock (14612)	Direct
2017-02-06	Employee Stock Option (Right to Buy)	$39.54	M	8547	Disposed	2025-11-11	Common Stock (8547)	Direct
2017-02-07	Employee Stock Option (Right to Buy)	$35.25	M	13477	Disposed	2022-11-08	Common Stock (13477)	Direct
2017-02-07	Employee Stock Option (Right to Buy)	$39.54	M	1059	Disposed	2025-11-11	Common Stock (1059)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	9857.56	Indirect

Footnotes

F1: The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $57.50 to $57.90, 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: The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $57.50 to $57.78, 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: The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $57.51 to $57.84, 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.

F4: The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $57.54 to $57.72, 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.

F5: Reflects retirement plan contributions by the Corporation, including contributions that have occurred since the date of the reporting person's last ownership report.

F6: 28,089 shares were subject to the option. The option vested over a three year period as follows: 30% on November 9, 2013, 30% on November 9, 2014 and 40% on November 9, 2015.

F7: 32,021 shares are subject to the option. The option vests over a three year period as follows: 30% on November 12, 2016, 30% on November 12, 2017 and 40% on November 12, 2018.