497 1 g35741rbb497_supplement.txt RBB 497 SUPPLEMENT THE RBB FUND, INC. ROBECO INVESTMENT FUNDS ROBECO BOSTON PARTNERS Large Cap Value Fund ROBECO BOSTON PARTNERS Mid Cap Value Fund ROBECO BOSTON PARTNERS Small Cap Value Fund II ROBECO BOSTON PARTNERS All-Cap Value Fund ROBECO BOSTON PARTNERS Long/Short Equity Fund ROBECO WPG Core Bond Fund ROBECO WPG Large Cap Growth Fund ROBECO WPG Tudor Fund Institutional Class Supplement dated September 19, 2006 to Prospectus dated December 31, 2005 THIS SUPPLEMENT CONTAINS NEW AND ADDITIONAL INFORMATION BEYOND THAT CONTAINED IN THE PROSPECTUS AND SHOULD BE READ IN CONJUNCTION WITH THE PROSPECTUS. THE FOLLOWING CHANGES TO THE FUNDS' DISCLOSURE OF PORTFOLIO HOLDINGS WILL BE EFFECTIVE OCTOBER 3, 2006. THE PARAGRAPH UNDER THE CAPTION "DISCLOSURE OF PORTFOLIO HOLDINGS" ON PAGE 45 OF THE PROSPECTUS IS REMOVED IN ITS ENTIRETY AND REPLACED WITH THE FOLLOWING: Effective October 3, 2006, each Fund's complete portfolio holdings, except the Robeco Boston Partners Long/Short Equity Fund, will be publicly available on the Adviser's website at www.robecoinvest.com as of each calendar quarter (March 31, June 30, September 30 and December 31) 30 days following the quarter end. Effective October 3, 2006, the complete long positions of the Robeco Boston Partners Long/Short Equity Fund will be publicly available on the Adviser's website at www.robecoinvest.com as of each calendar quarter (March 31, June 30, September 30 and December 31) 30 days following the quarter end. A further description of the Company's policies and procedures with respect to the disclosure of the Funds' portfolio securities is available in the Statement of Additional Information. PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE. THE RBB FUND, INC. ROBECO INVESTMENT FUNDS ROBECO BOSTON PARTNERS Large Cap Value Fund ROBECO BOSTON PARTNERS Mid Cap Value Fund ROBECO BOSTON PARTNERS Small Cap Value Fund II ROBECO BOSTON PARTNERS All-Cap Value Fund ROBECO BOSTON PARTNERS Long/Short Equity Fund ROBECO WPG Core Bond Fund Investor Class Supplement dated September 19, 2006 to Prospectus dated December 31, 2005 THIS SUPPLEMENT CONTAINS NEW AND ADDITIONAL INFORMATION BEYOND THAT CONTAINED IN THE PROSPECTUS AND SHOULD BE READ IN CONJUNCTION WITH THE PROSPECTUS. THE FOLLOWING CHANGES TO THE FUNDS' DISCLOSURE OF PORTFOLIO HOLDINGS WILL BE EFFECTIVE OCTOBER 3, 2006. THE PARAGRAPH UNDER THE CAPTION "DISCLOSURE OF PORTFOLIO HOLDINGS" ON PAGE 37 OF THE PROSPECTUS IS REMOVED IN ITS ENTIRETY AND REPLACED WITH THE FOLLOWING: Effective October 3, 2006, each Fund's complete portfolio holdings, except the Robeco Boston Partners Long/Short Equity Fund, will be publicly available on the Adviser's website at www.robecoinvest.com as of each calendar quarter (March 31, June 30, September 30 and December 31) 30 days following the quarter end. Effective October 3, 2006, the complete long positions of the Robeco Boston Partners Long/Short Equity Fund will be publicly available on the Adviser's website at www.robecoinvest.com as of each calendar quarter (March 31, June 30, September 30 and December 31) 30 days following the quarter end. A further description of the Company's policies and procedures with respect to the disclosure of the Funds' portfolio securities is available in the Statement Additional Information. PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE. THE RBB FUND, INC. ROBECO INVESTMENT FUNDS ROBECO WPG Core Bond Fund Retirement Class Supplement dated September 19, 2006 to Prospectus dated December 31, 2005 THIS SUPPLEMENT CONTAINS NEW AND ADDITIONAL INFORMATION BEYOND THAT CONTAINED IN THE PROSPECTUS AND SHOULD BE READ IN CONJUNCTION WITH THE PROSPECTUS. THE FOLLOWING CHANGES TO THE FUND'S DISCLOSURE OF PORTFOLIO HOLDINGS WILL BE EFFECTIVE OCTOBER 3, 2006. THE PARAGRAPH UNDER THE CAPTION "DISCLOSURE OF PORTFOLIO HOLDINGS" ON PAGE 10 OF THE PROSPECTUS IS REMOVED IN ITS ENTIRETY AND REPLACED WITH THE FOLLOWING: Effective October 3, 2006, the Fund's complete portfolio holdings will be publicly available on the Adviser's website at www.robecoinvest.com as of each calendar quarter (March 31, June 30, September 30 and December 31) 30 days following the quarter end. A further description of the Company's policies and procedures with respect to the disclosure of the Fund's portfolio securities is available in the Statement of Additional Information. PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE. ROBECO INVESTMENT FUNDS OF THE RBB FUND, INC. Supplement dated September 19, 2006 to Statement of Additional Information dated December 31, 2005 THIS SUPPLEMENT CONTAINS NEW AND ADDITIONAL INFORMATION BEYOND THAT CONTAINED IN THE STATEMENT OF ADDITIONAL INFORMATION AND SHOULD BE READ IN CONJUNCTION WITH THE STATEMENT OF ADDITIONAL INFORMATION. THE FOLLOWING CHANGES TO THE FUNDS' DISCLOSURE OF PORTFOLIO HOLDINGS WILL BE EFFECTIVE OCTOBER 3, 2006. THE THIRD PARAGRAPH AND TABLE DISCLOSED AS PART OF THE SECTION ENTITLED "DISCLOSURE OF PORTFOLIO HOLDINGS" ON PAGE 44 OF THE STATEMENT OF ADDITIONAL INFORMATION IS REMOVED IN ITS ENTIRETY AND REPLACED WITH THE FOLLOWING: The Adviser currently makes the Funds' complete portfolio holdings, top ten holdings, sector weightings and other portfolio characteristics publicly available on its web site, www.robecoinvest.com as disclosed in the following table:
---------------------------------------- -------------------------------- -------------------------------------- INFORMATION POSTING FREQUENCY OF DISCLOSURE DATE OF WEB POSTING ---------------------------------------- -------------------------------- -------------------------------------- Complete Portfolio Holdings Quarterly* 30 calendar days after the end of each quarter ---------------------------------------- -------------------------------- -------------------------------------- Top 10 Portfolio Holdings and other Quarterly 10 calendar days after the end of portfolio characteristics each calendar quarter ---------------------------------------- -------------------------------- -------------------------------------- * The complete long positions only of the Robeco Boston Partners Long/Short Equity Fund will be publicly available on the Adviser's website at WWW.ROBECOINVEST.COM as of each calendar quarter (March 31, June 30, September 30 and December 31) 30 days following the quarter end.
PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE.