Cabot Board Declares Dividend

November 11, 2005

BOSTON, Nov. 11 /PRNewswire-FirstCall/ -- On Friday, November 11, 2005, the Board of Directors of Cabot Corporation (NYSE: CBT) declared a quarterly dividend of $0.16 per share on all outstanding shares of the Corporation's common stock. The dividend is payable December 9, 2005 to stockholders of record at the close of business on November 25, 2005.

About Cabot Corporation

Cabot Corporation is a global specialty chemicals and materials company and is headquartered in Boston, MA. Cabot's major products are carbon black, fumed silica, inkjet colorants, capacitor materials, and cesium formate drilling fluids.

Contact: Susannah R. Robinson

Director, Investor Relations
(617) 342-6129