CABOT CORP — Director's Dealing 2009

Oct 1, 2009

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CABOT CORP (CBT)
CIK: 0000016040
Period of Report: 2009-09-30

Reporting Person: MCCANCE HENRY F (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2009-09-30	Phantom Stock Units	$	A	594.9805	Acquired		Common Stock (594.9805)	Direct

Footnotes

F1: 1 for 1

F2: Immediately exercisable

F3: The shares of phantom stock become payable upon the reporting person's termination of service as a director.

F4: On July 10, 2009, Cabot's Board of Directors declared a dividend of $0.18 per share on Cabot common stock, payable on September 11, 2009 to all holders of record of common stock on August 28, 2009. Mr. McCance received a dividend on his phantom stock units totalling $1,370.26, which was immediately reinvested in phantom stock units at a price of $20.62 per share. As a result, 66.4530 phantom stock units were allocated to Mr. McCance on September 11, 2009.