QUANTUMONLINE.COM SECURITY DESCRIPTION:  UBS AG, Enhanced Appreciation Notes due 8/30/2004, issued at $1000 principal amount per Note, and linked to performance of the S&P 500 Index. The holder will receive no payments prior to maturity. At maturity the holder will receive a payment based on the change in the S&P 500 Index (initial value 923.42 as of 5/21/2003). If the Index has increased from the initial value, the maturity payment will be triple the percentage increase in the S&P 500 Index, not to exceed $1,170 per note. If the index has decreased, the holder will receive a payment based on the percentage of decrease. As a result, the maturity payment may be less, and possibly significantly less, than the $1000 offering price. The Notes are medium-term notes issued by UBS AG. See the IPO prospectus for further information on the maturity payment and the Enhanced Appreciation Notes by clicking on the ‘Link to IPO Prospectus’ provided below.

Company's Online Information Links

HOME PAGE:     http://www.ubs.com/ (This parent company URL is for reference only and does not have specific information on the security.)

Company's Online SEC EDGAR Filings

Company's SEC EDGAR Filings

Go to SEC Filings

Company's Email Address Links

Email Address	investor-relations@ubs.com
Email Contact Form on Website	Go to Email Form

Foreign Address and Phone Numbers

Address:   Bahnhofstrasse 45, Zurich, Switzerland
Main Phone Number	+41-1-234-41-00
Fax Number	+41-1-234-34-15
Inv Rel Phone Number	+41-1-234-4360

Address and Phone Numbers

U.S. Representative	UBS New York
Address:   1285 Avenue of the Americas, New York, NY 10019
Main Phone Number	212-821-3000
Fax Number	212-713-1381