CABOT CORP — Director's Dealing 2006

Nov 29, 2006

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CABOT CORP (CBT)
CIK: 0000016040
Period of Report: 2006-11-27

Reporting Person: MCARTHUR JOHN H (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2006-11-27	Common stock	S	3500	$41.75	Disposed	5581.834	Direct
2006-11-27	Common Stock	S	100	$41.76	Disposed	5481.834	Direct
2006-11-27	Common Stock	S	200	$41.79	Disposed	5281.834	Direct
2006-11-27	Common Stock	S	500	$41.80	Disposed	4781.834	Direct
2006-11-27	Common Stock	S	187	$41.81	Disposed	4594.834	Direct
2006-11-27	Common Stock	S	313	$41.82	Disposed	4281.834	Direct

Footnotes

F1: Includes 2,500 shares granted to Mr. McArthur on September 29, 2006, which Mr. McArthur elected to defer pursuant to Cabot's Non-Employee Directors' Stock Deferral Plan.