Stull, Stull & Brody
Announces Investigation Relating to the
401(k) Plan of UBS (NYSE:UBS)

New York, New York, November 5, 2007— Stull, Stull & Brody today announced that it has commenced an investigation relating to the 401(k) defined contribution retirement plan of UBS AG (“UBS” or the “Company”). Among other things, Stull, Stull & Brody is investigating whether fiduciaries of the UBS 401(k) plan may have violated the Employee Retirement Income Security Act of 1974 (“ERISA”) by failing to disclose improper acts and practices and by offering UBS stock as an investment option under the UBS 401(k) plan when it was not prudent to do so.

If you currently hold UBS common stock in an individual account under the UBS 401(k) plan, you may, if you wish, consult with a representative of Stull, Stull & Brody at no cost or obligation. The contact information for Stull, Stull & Brody is as follows:

Email: ssbny@aol.com
Fax: (212) 490-2022
Toll Free Number: 1-800-337-4983
(Edwin J. Mills, Esq. or Tzivia Brody, Esq.)

Mail: Stull, Stull & Brody
6 East 45th Street
New York, NY 10017

Stull, Stull & Brody has extensive experience in protecting the rights of 401(k) plan participants and beneficiaries and shareholders of public companies. Stull, Stull & Brody is presently representing classes of 401(k) plan participants in many class action cases throughout the country. Stull, Stull & Brody maintains offices in New York and Los Angeles.

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