CABOT CORP — Director's Dealing 2011

Apr 1, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CABOT CORP (CBT)
CIK: 0000016040
Period of Report: 2011-03-31

Reporting Person: MCCANCE HENRY F (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-03-31	Phantom Stock Units	$	A	480.6654	Acquired		Common Stock (480.6654)	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 January 14, 2011, Cabot's Board of Directors declared a dividend of $0.18 per share on Cabot common stock, payable on March 11, 2011 to all holders of record of common stock on February 25, 2011. Mr. McCance received a dividend on his phantom stock units totalling $2,047.37, which was immediately reinvested in phantom stock units at a price of $42.95 per share. As a result, 47.6687 phantom stock units were allocated to Mr. McCance on March 11, 2011.