Cabot Board Declares Dividend

May 13, 2005

BOSTON, May 13, 2005 /PRNewswire-FirstCall via COMTEX/ -- On Friday, May 13, 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 June 10, 2005 to stockholders of record at the close of business on May 27, 2005.

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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) 342-6244

SOURCE Cabot Corporation