CABOT CORP — Director's Dealing 2018

May 18, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CABOT CORP (CBT)
CIK: 0000016040
Period of Report: 2018-05-15

Reporting Person: McLaughlin Erica (Senior Vice President, CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-05-15	Common Stock	A	1839	$0.00	Acquired	11258	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-05-15	Employee Stock Option (Right to Buy)	$61.17	A	8910	Acquired	2028-05-14	Common Stock (8910)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1.37	Indirect

Footnotes

F1: Reflects units subject to time-based vesting.

F2: Reflects retirement plan contributions by the Corporation.

F3: The option vests over a three year period as follows: 30% on November 10, 2018, 30% on November 10, 2019 and 40% on November 10, 2020.