X0203 0001143313 AMERICAN STOCK EXCHANGE LLC 0001114446 UBS AG 001-15060

The Corporation Trust Company Wilmington DE DELAWARE 19801

Bullish Underlying Linked Security ("BULS"), linked to the S&P 500 Index, maturing October 17, 2006 17 CFR 240.12d2-2(a)(2) Kerri L. Ramirez Manager, Corporate Actions and Proxy Rulings 2006-10-18