Cabot Corporation to Announce Third Quarter 2005 Earnings

July 13, 2005

BOSTON, Mass., July 13, 2005 /PRNewswire-FirstCall via COMTEX/ -- Cabot Corporation (NYSE: CBT) announced today that it will release financial results for the third quarter of fiscal 2005 on Wednesday, July 27, 2005, after the market closes. The Company will host a conference call and live webcast to review the third quarter results beginning at 9:00 a.m. (ET) on Thursday, July 28, 2005.

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

This call is being webcast by Thomson/CCBN and may be accessed at Cabot's web site at http://investor.cabot-corp.com. The webcast is also being distributed through the Thomson StreetEvents Network. Institutional investors may access the call via Thomson StreetEvents (http://www.streetevents.com), a password-protected event management site.

If you are unable to participate during the live webcast, the call will be archived on the Company's website at http://investor.cabot-corp.com. A recorded playback will also be available beginning at approximately 11:00 a.m. (ET), Thursday, July 28, 2005 and running until Sunday, August 28, 2005. The dial-in number for the replay is (888) 286-8010 within the U.S. or (617) 801- 6888 outside the U.S. with a passcode of 95686755.

About Cabot Corporation

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

SOURCE Cabot Corporation