ROBECO WPG SMALL/MICRO CAP VALUE FUND (Prospectus Summary) | ROBECO WPG SMALL/MICRO CAP VALUE FUND

SUMMARY SECTION

Investment Objective

The Fund seeks capital appreciation by investing primarily in common stocks,
securities convertible into common stocks and in special situations.

Expenses and Fees

This table describes the fees and expenses that you may pay if you buy and hold
Institutional Class shares of the Fund.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	ROBECO WPG SMALL/MICRO CAP VALUE FUND INSTITUTIONAL CLASS
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	none
Maximum deferred sales charge (load)	none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends	none
Redemption fee (as a percentage of amount redeemed on shares held for less than 60 days, if applicable)	2.00%
Exchange fee (as a percentage of amount exchanged on shares held for less than 60 days, if applicable)	2.00%

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		ROBECO WPG SMALL/MICRO CAP VALUE FUND INSTITUTIONAL CLASS
Management Fees		0.90%
Distribution (12b-1) Fees		none
Other expenses		0.80%
Total annual Fund operating expenses		1.70%
Fee Waivers and Expense Reimbursements	[1]	none
Net expenses		1.70%

Example

This Example is intended to help you compare the cost of investing in the Fund
with the cost of investing in other mutual funds. The Example assumes that you
invest $10,000 in the Fund for the time periods indicated and that you sell all
of your shares at the end of the period. The Example also assumes that your
investment has a 5% return each year and that the operating expenses of the Fund
remain the same. Although your actual costs may be higher or lower, based on
these assumptions your costs would be:

Expense Example (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
ROBECO WPG SMALL/MICRO CAP VALUE FUND INSTITUTIONAL CLASS	173	535	922	2,007

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells
securities (or "turns over" its portfolio). A higher portfolio turnover rate
may indicate higher transaction costs and may result in higher taxes when
Fund shares are held in a taxable account. These costs, which are not
reflected in Total Annual Fund Operating Expenses or in the Example, affect
the Fund's performance. During the fiscal year ended August 31, 2012, the
portfolio turnover rate for the Fund was 84%.

Summary of Principal Investment Strategies

Currently, the Fund pursues its objective by investing, under normal
circumstances, at least 80% of its net assets (including borrowings for
investment purposes) in equity securities of U.S. companies, that, at the time
of purchase, have a market capitalization that is within the range of the market
capitalization of issuers in the Russell 2000® Value Index. As of November 30,
2012, the median market capitalization of the companies in the Russell 2000®
Value Index is $433 million and the largest stock is $4.8 billion. The Fund may
invest indepository receipts and equity securities of foreign companies.
Although the Fund invests primarily in common stocks, the Fund may invest in all
types of equity and equity-related securities, including (without limitation):

o Securities convertible into common stocks.

o Shares of real estate investment trusts ("REITs").

o Warrants and rights to purchase common stocks.

o Preferred stocks.

o Exchange traded limited partnerships.

Special Situations: The Fund may invest in companies that may experience unusual
and possibly unique developments which may create a special opportunity for
significant returns. Special situations include: significant technological
improvements or important discoveries; reorganizations, recapitalizations or
mergers; favorable resolutions of litigation; new management or material changes
in company policies; and actual or potential changes in control of a company.

Strategies: Robeco uses a value approach to select the Fund's investments. Using
this investment style, Robeco seeks securities selling at substantial discounts
to their underlying values and then holds these securities until the market
values reflect what Robeco believes to be their intrinsic values. Robeco employs
a bottom-up strategy, focusing on undervalued industries that Robeco believes
are experiencing positive change. Robeco then uses both qualitative and
quantitative methods to assess a security's potential value. The portfolio
managers managing the Fund meet with a multitude of companies annually to
identify companies with increasing returns on capital in their core businesses
which are selling at attractive valuations.

Factors Robeco looks for in selecting investments include (without limitation):

o Increasing returns on invested capital.

o Companies who have demonstrated an ability to generate high return on invested
capital (ROIC).

o Companies which provide solid cash flows with appropriate capital.

o Potential catalysts such as new products, cyclical upturns and changes in
management.

o Low market valuations relative to earnings forecast, book value, cash flow and
sales.

Robeco will sell a stock when it no longer meets one or more investment
criteria, either through obtaining target value or due to an adverse change in
fundamentals or business momentum. Each holding has a target valuation
established at purchase, which Robeco constantly monitors and adjusts as
appropriate.

Summary of Principal Risks

o Market Risk. The net asset value ("NAV") of the Fund will change with changes
in the market value of its portfolio positions. Investors may lose money.
Although the Fund will invest in stocks Robeco believes to be undervalued, there
is no guarantee that the price of these stocks will not move even lower.

o Foreign Securities Risk. International investing is subject to special risks,
including, but not limited to, currency exchange rate volatility, political,
social or economic instability, and differences in taxation, auditing and other
financial practices.

o Management Risk. The Fund is subject to the risk of poor stock selection. In
other words, the individual stocks in the Fund may not perform as well as
expected, and/or the Fund's portfolio management practices do not work to
achieve their desired result.

o Small Cap Companies Risk. The small capitalization equity securities in which
the Fund may invest will often be traded only in the over-the-counter market or
on a regional securities exchange, may be listed only in the quotation service
commonly known as the "pink sheets," and may not be traded every day or in the
volume typical of trading on a national securities exchange. These securities
may also be subject to wide fluctuations in market value. The trading market for
any given small capitalization equity security may be sufficiently small as to
make it difficult for the Fund to dispose of a substantial block of such
securities. The sale by the Fund of portfolio securities to meet redemptions may
require the Fund to sell its small capitalization securities at a discount from
market prices or during periods when, in Robeco's judgment, such sale is not
desirable. Moreover, the lack of an efficient market for these securities may
make them difficult to value.

o Convertible Securities Risk. Securities that can be converted into common
stock, such as certain securities and preferred stock, are subject to the usual
risks associated with fixed income investments, such as interest rate risk and
credit risk. In addition, because they react to changes in the value of the
equity securities into which they will convert, convertible securities are also
subject to the risks associated with equity securities.

o REITs Risk. REITs may be affected by economic forces and other factors related
to the real estate industry. Investing in REITs may involve risks similar to
those associated with investing in small capitalization companies. REITs may
have limited financial resources, may trade less frequently and in a limited
volume and may be subject to more abrupt or erratic price movements than larger
company securities. Historically, small capitalization stocks, such as REITs,
have been more volatile in price than the larger capitalization stocks included
in the S&P 500® Index.

o Special Situations Risk. The Fund will seek to benefit from "special
situations," such as mergers, reorganizations, or other unusual events expected
to affect a particular issuer. There is a risk that the "special situation"
might not occur or involve longer time frames than originally expected, which
could have a negative impact on the price of the issuer's securities and fail to
produce gains or produce a loss for the Fund.

o Rights and Warrants Risk. The purchase of rights or warrants involves the risk
that the Fund could lose the purchase value of a right or warrant if the right
to subscribe to additional shares is not executed prior to the right's or
warrant's expiration. Also, the purchase of rights and/or warrants involves the
risk that the effective price paid for the right and/or warrant added to the
subscription price of the related security may exceed the value of the
subscribed security's market price such as when there is no movement in the
level of the underlying security.

Performance Information

The bar chart and table below illustrate the long-term performance of the Robeco
WPG Small/Micro Cap Value Fund's Institutional Class. The performance for
periods prior to April 29, 2005 represents the performance of the WPG Tudor Fund
(the "Predecessor Fund"). The Predecessor Fund began operations on September 11,
1985. On April 29, 2005, the Predecessor Fund was reorganized as a new portfolio
of the Company. Prior to the reorganization, the Predecessor Fund offered only
one class of shares. In connection with the reorganization, shareholders of the
Predecessor Fund exchanged their shares for Institutional Class shares of the
Fund.

The bar chart below shows you how the performance of the Fund's Institutional
Class has varied year to year and provides some indication of the risks of
investing in the Fund. The bar chart assumes reinvestment of dividends and
distributions. As with all such investments, past performance (before and after
taxes) is not an indication of future results. Performance reflects fee waivers
in effect. If fee waivers were not in place, the Fund's performance would be
reduced. Updated performance information is available at www.robecoinvest.com or
1-888-261-4073.

Total Returns for the Calendar Years Ended December 31

Best and Worst Quarterly Performance (for the periods reflected in the chart
above):

Best Quarter: 28.51% (quarter ended June 30, 2009)
Worst Quarter: (30.21)% (quarter ended December 31, 2008)
Year-to-date total return for the nine months ended September 30, 2012: 17.35%

Average Annual Total Returns

The table below compares the average annual total returns for the Fund's
Institutional Class both before and after taxes for the past calendar year,
past five calendar years and past 10 calendar years to the average annual
total returns of a broad-based securities market index for the same periods.

Average Annual Total Returns (for the Periods Ended December 31, 2011)

^[1]

Average Annual Total Returns ROBECO WPG SMALL/MICRO CAP VALUE FUND	Label		1 Year	5 Years	10 Years
INSTITUTIONAL CLASS	Return Before Taxes		(11.95%)	(2.23%)	3.31%
INSTITUTIONAL CLASS After Taxes on Distributions	Return After Taxes on Distributions	[1]	(11.95%)	(3.09%)	1.97%
INSTITUTIONAL CLASS After Taxes on Distributions and Sales	Return After Taxes on Distributions and Sale of Shares		(7.76%)	(2.23%)	2.26%
Russell 2000® Value Index	Russell 2000® Value Index (reflects no deduction for fees, expenses or taxes)		(5.50%)	(1.88%)	6.40%

[1] The Fund's investment adviser, Robeco Investment Management, Inc. ("Robeco") has contractually agreed to waive a portion of its advisory fee and/or reimburse expenses in an aggregate amount equal to the amount by which the Total Annual Fund Operating Expenses (excluding certain items discussed below) for the Fund's Institutional Class exceeds 1.70% of the average daily net assets attributable to the Fund's Institutional Class shares. In determining Robeco's obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and could cause net Total Annual Fund Operating Expenses to exceed 1.70%: acquired fund fees and expenses, short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation is in effect until December 31, 2013 and may not be terminated without the approval of the Board of Directors of The RBB Fund, Inc. Robeco may not recoup any of its waived investment advisory fee. The amount waived for the fiscal year ended August 31, 2012 was less than 0.01%.

[1] After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. The table, like the bar chart, provides some indication of the risks of investing in the Fund by showing how the Fund's average annual total returns for the one year, five year, and since inception periods compare with those of a broad measure of market performance.

[1] The performance record prior to August 18, 2003 was achieved under the Predecessor Fund's growth-related strategy.