This material must be preceded or accompanied by a prospectus. To order a prospectus, which explains management fees and expenses and the special risks of investing in the funds, visit www.oakmark.com or call 1-800-OAKMARK. Please read the prospectus carefully before investing.

The discussion of investments and investment strategy of the funds represents the investments of the funds and the views of fund managers and Harris Associates L.P., the funds' investment adviser, at the time of this article, and are subject to change without notice.

The performance data quoted represents past performance. The above performance information for the Fund does not reflect the imposition of a 2% redemption fee on Class I shares held for 90 days or less to deter market timers. If reflected, the fee would reduce the performance quoted. Past performance does not guarantee future results. The investment return and principal value will fluctuate so that an investor's shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance data quoted. Average annual total return measures annualized change, while total return measures aggregate change. To obtain current month end performance data call 1-800-OAKMARK.

Investing in value stocks presents the risk that value stocks may fall out of favor with investors and underperform growth stocks during given periods.

The Oakmark Select Fund closed to new investors as of 5/4/01.

Because the Oakmark Select Fund is non-diversified, the performance of each holding will have a greater impact on the Fund's total return, and may make the Fund's return more volatile than a more diversified fund.

The Oakmark Equity & Income Fund closed to certain new investors as of 5/7/04.

Equity and Income invests in medium- and lower-quality debt securities that have higher yield potential but present greater investment and credit risk than higher-quality securities, which may result in greater share price volatility. An economic downturn could severely disrupt the market in medium or lower grade debt securities and adversely affect the value of outstanding bonds and the ability of the issuers to repay principal and interest.

The Oakmark Global Fund and The Oakmark International Fund closed to certain new investors as of 12/15/03.

The Oakmark International Small Cap Fund closed to new investors as of 5/10/02.

Investing in foreign securities represents risks which in some way may be greater than in U.S. investments. Those risks include: currency fluctuation; different regulation, accounting standards, trading practices and levels of available information; generally higher transaction costs; and political risks.

The stocks of smaller companies often involve more risk than the stocks of larger companies. Stocks of small companies tend to be more volatile and have a smaller public market than stocks of larger companies. Small companies may have a shorter history of operations than larger companies, may not have as great an ability to raise additional capital and may have a less diversified product line, making them more susceptible to market pressure.