Cabot Corporation Elects Directors

March 11, 2005

BOSTON, March 11 /PRNewswire-FirstCall/ -- Cabot Corporation (NYSE: CBT) announced today the election of two new members to its Board of Directors at its Annual Meeting of Shareholders held March 10, 2005. Juan Enriquez-Cabot and Henry McCance were elected for three-year terms to expire in 2008. In addition, Board members Arthur Goldstein, Gautum Kaji, and John McArthur were re-elected for three-year terms to expire in 2008. Dirk Blevi, who was elected by the Board in September 2004 to fill a newly created directorship, was re-elected for a one-year term to expire in 2006.

(Logo: http://www.newscom.com/cgi-bin/prnh/20000323/CABOTLOGO )

As previously announced, John G. L. Cabot retired at the Annual Meeting of Shareholders in accordance with the Board's retirement policy prior to its amendment in November 2004.

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

Contact: Susannah Robinson
Director, Investor Relations
617-342-6244

Ethel Shepard
Corporate Affairs Manager
617-342-6254
ethel_shepard@cabot-corp.com

SOURCE Cabot Corporation

/Web site: http://www.cabot-corp.com /
(CBT)