Sources of information

Annual report 2007

Four reports make up UBS's full Annual Report 2007. They comply with the US disclosure requirements for foreign private issuers as defined by Form 20-F of the Securities and Exchange Commission (SEC) and combine audited and non-audited information. All four reports are available in English and German (SAP no.80531). The four reports are:

Strategy, Performance and Responsibility 2007

This provides a description of our firm, its strategy, organizational structure and financial performance for the last two years. It also discusses our standards for corporate behavior and responsibility, outlines demographic trends in our workforce and describes the way our people learn and are led.

Risk, Treasury and Capital Management 2007

In addition to outlining the principles by which we manage and control risk, this report provides an account of developments in credit risk, market risk, operational risk and treasury management during 2007. It also provides information on UBS shares.

Corporate Governance and Compensation Report 2007

Comprehensive information on our governance arrangements is included in this report, which also explains how we manage our relationships with regulators and shareholders. Compensation of senior management and the Board of Directors (executive and non-executive members) is discussed here. This report can be ordered separately (SAP no. 82307).

Financial Statements 2007

This comprises the audited financial statements of UBS for 2007, 2006 and 2005, prepared according to the International Financial Reporting Standards (IFRS). It also includes the audited financial statements of UBS AG (the parent bank) for 2007 and 2006, prepared according to Swiss banking law. Additional disclosure required by Swiss and US regulations is included where appropriate.

In addition to the four reports, Review 2007 is distributed broadly to UBS shareholders and contains key information on our strategy and financials. This booklet summarizes the information in the four-part annual report.

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Quarterly reports

We provide detailed quarterly financial reporting and analysis, including comment on the progress of our businesses and key strategic initiatives. These quarterly reports are available in English.

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How to order reports

These reports are available in PDF format on the internet at www.ubs.com/investors/topics in the reporting section. Printed copies can be ordered from the same website by accessing the order / subscribe panel on the right-hand side of the screen. Alternatively, they can be ordered by quoting the SAP number and the language preference where applicable, from UBS AG, Information Center, P.O. Box, CH-8098 Zurich, Switzerland.

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Information tools for investors

Website

Our Analysts & Investors website at www.ubs.com/investors offers a wide range of information about UBS, financial information (including SEC filings), corporate information, share price graphs and data, an event calendar, dividend information and recent presentations given by senior management to investors at external conferences. Information on the internet is available in English and German, with some sections in French and Italian.

Messaging service

On the Analysts & Investors website, you can register to receive news alerts about UBS via Short Messaging System (SMS) or e-mail. Messages are sent in either English or German and users are able to state their preferences for the topics of the alerts received.

Results presentations

Senior management presents UBS's results every quarter. These presentations are broadcast live over the internet, and can be downloaded on demand. The most recent result webcasts can be found in the financials section of our Analysts & Investors website.

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Form 20-F and other submissions to the US Securities and Exchange Commission

We file periodic reports and submit other information about UBS to the US Securities and Exchange Commission (SEC). Principal among these filings is our annual report on Form 20-F, filed pursuant to the US Securities Exchange Act of 1934.

Our Form 20-F filing is structured as a "wrap-around" document. Most sections of the filing can be satisfied by referring to parts of the four reports (Strategy, Performance and Responsibility 2007, Risk, Treasury and Capital Management 2007, Corporate Governance and Compensation Report 2007 and Financial Statements 2007). However, there is a small amount of additional information in Form 20-F which is not presented elsewhere, and is particularly targeted at readers in the US. You are encouraged to refer to this additional disclosure.

You may read and copy any document that we file with the SEC on the SEC's website, www.sec.gov, or at the SEC's public reference room at 100 F Street, N.E., Room 1580, Washington, DC, 20549. Please call the SEC by dialing 1-800-SEC-0330 (in the US) or +1 202 942 8088 (outside the US) for further information on the operation of its public reference room. You may also inspect our SEC reports and other information at the New York Stock Exchange, Inc., 20 Broad Street, New York, NY 10005. Much of this additional information may also be found on the UBS website at www.ubs.com/investors, and copies of documents filed with the SEC may be obtained from UBS's Investor Relations team at the address shown on the next page.