FORTIS L FUND (the Company )

Third Supplementary Prospectus dated 5 April 2010 to the Singapore Prospectus registered on 20 November 2009 FORTIS L FUND (the Company ) THIRD SUPPLEMENTARY PROSPECTUS LODGED PURSUANT TO SECTION 298 OF THE SECURITIES AND FUTURES ACT (CHAPTER 289) A copy of this Third Supplementary Prospectus has been lodged with the Monetary Authority of Singapore who takes no responsibility for its contents. This Third Supplementary Prospectus is supplemental to the Singapore Prospectus registered by the Monetary Authority of Singapore on 20 November 2009 as supplemented by a First Supplementary Prospectus lodged on 20 January 2010 and a Second Supplementary Prospectus lodged on 17 March 2010 (together known as the Singapore Prospectus ) and issued pursuant to Division 2 of Part XIII of the Securities and Futures Act (Chapter 289) relating to the Company. This Third Supplementary Prospectus shall be read and construed in conjunction with and as one document with the Singapore Prospectus. Terms defined and references construed in the Singapore Prospectus shall have the same meaning and construction ascribed to them in this Third Supplementary Prospectus. This Third Supplementary Prospectus sets out the amendments required to be made to the Singapore Prospectus to reflect the changes in the details of the investment managers as follows:- (1) the change of the Singapore Representative from Singapore Limited to BNP Paribas Asset Management Singapore Limited with effect from 1 May 2010; (2) the merger of Neuflize OBC Asset Management (NOAM) S.A. with its sister company, Asset Allocation Advisors and the consequent change of name to Neuflize OBC Investissement with effect from 1 April 2010; (3) the change of name of Netherlands N.V. to BNP Paribas Investment Partners Netherlands N.V. with effect from 6 April 2010; (4) the change of name of Fortis Investment Management France SA to BNP Paribas Asset Management SAS following a merger of the two entities with effect from 3 May 2010; and (5) the change of the telephone number of the Singapore Representative with immediate effect :- In connection with the foregoing, the Singapore Prospectus shall be amended as follows:- 1. Directory of the Singapore Prospectus By deleting the section Singapore Representative from the Directory of the Singapore Prospectus and replacing it with the following, with immediate effect:- Singapore Representative Singapore Limited (up to 30 April 2010) BNP Paribas Asset Management Singapore Limited (as from 1 May 2010) Registered Office 20 Collyer Quay #01-01 Tung Centre Singapore 049319

2 Business Office 16 Collyer Quay #32-01 Hitachi Tower Singapore 049318 2. Section 1.5 of the Singapore Prospectus By deleting Section 1.5 of the Singapore Prospectus and replacing it with the following, with immediate effect :- The Articles of Association The Articles of Association of the Company have been filed with the Registrar of the District Court of Luxembourg and a copy may be inspected by contacting the Singapore Representative at 16 Collyer Quay, #32-01 Hitachi Tower, Singapore 049318 during normal business hours. 3. Section 1.6 of the Singapore Prospectus By deleting Section 1.6 of the Singapore Prospectus and replacing it with the following, with immediate effect:- Latest semi-annual reports and audited financial statements The latest audited financial statements and semi-annual reports may be obtained from the Singapore Representative at 16 Collyer Quay, #32-01 Hitachi Tower, Singapore 049318. 4. Section 2.3 of the Singapore Prospectus By deleting Section 2.3 of the Singapore Prospectus in its entirety and replacing it with the following, with effect from 6 April 2010:- Investment Managers for the Subfunds The Management Company has delegated the investment management functions to various Investment Managers. The exercise of these functions is subject to the overall supervision of the Board of Directors. For this purpose, the Investment Managers present periodic reports to the Board of Directors. The Management Company monitors the activities of the Investment Managers and may impose limitations, give additional instructions or summarily withdraw any and all responsibilities delegated if it believes that doing so is in the best interests of investors. Any delegation of duty does not vary the Management Company s liability towards the Company. The following Investment Managers have been delegated investment management functions for the following subfunds with the permission of the Company:-

3 Fortis L Fund Subfund Investment Managers Year Investment Manager started managing funds Opportunities Belgium S.A. (formerly known as Fortis Investment Management Belgium S.A.) and others. Please refer to the note at the end of this table for more details. Avenue de l Astronomie, 14, 1210 Brussels, Belgium 2006 Bond Best Selection Emerging Bond Convertible Asia Bond Corporate Euro Bond Corporate Emerging Bond Euro Bond Europe Emerging Bond Government Euro Bond Inflation-linked Bond USD Bond Emerging Bond Emerging Local Currency Equity Europe Emerging Equity Growth Europe Equity Russia Equity Small Caps Europe Equity Turkey Global Asset Opportunities Opportunities Short Term Euro V350 UK Ltd 82 Bishopsgate London EC2N 4BN United Kingdom 1970

4 Fortis L Fund Subfund Investment Managers Year Investment Manager started managing funds Equity Germany Equity SRI Green Future Green Tigers Belgium S.A. Zweigniederlassung Deutschland (formerly known as Belgium S.A., Germany Branch) Ulmenstrasse 23-25 D-60325 Frankfurt am Main Germany 2006 Bond Convertible Equity Best Selection Europe Equity Europe France SA (to merge with and be known as BNP Paribas Asset Management SAS with effect from 3 May 2010) 23, rue de l Amiral d Estaing F - 75209 Paris, France 1986 Equity Asia Emerging Equity Asia ex-japan Equity Best Selection Asia ex-japan Equity China Equity High Dividend Pacific Equity India Equity Indonesia Asia Ltd (formerly known as ABN AMRO Asset Management (Asia) Ltd) 43/F Cheung Kong Centre 2 Queen s Road, Central Hong Kong 1991 Equity Best Selection USA Equity Best Selection Equity Brazil Equity Consumer Durables Equity Consumer Goods Equity Energy USA, Inc. 75 State Street Boston Massachusetts 02109 USA 1979

5 Fortis L Fund Subfund Investment Managers Year Investment Manager started managing funds Equity Finance Equity Growth USA Equity Health Care Equity Industrials Equity Latin America Equity Materials Equity Middle East and Africa Equity Technology Equity Telecom Equity Utilities Equity Emerging Opportunities Short Term USD Commodity Equity High Dividend Europe OBAM Equity Opportunities Netherlands N.V. (formerly known as Netherlands N.V.) De Entree 99, NL-1101 HE Amsterdam ZO, The Netherlands 1982 Equity Japan Equity Small Caps Japan Opportunities Japan Co Ltd. Yamato Life Building 23F 1-5-7 Uchisaiwaicho Chiyoda-ku 100-0011 Tokyo Japan 1992

6 Fortis L Fund Subfund Investment Managers Year Investment Manager started managing funds Singapore Limited Bond Asia ex-japan Opportunities Real Estate Securities Pacific Registered Office 20 Collyer Quay #01-01 Tung Centre Singapore 049319 Business Office 16 Collyer Quay #32-01 Hitachi Tower Singapore 049318 1997 Opportunities Europe Neuflize OBC Investissement (with effect from 1 April 2010, following a merger between Neuflize OBC Asset Management (NOAM) S.A. and Asset Allocation Advisors) 1997 3 Avenue Hoche, F-75008 Paris France Opportunities USA Neuflize Private Assets (NPA) S.A. 3 Avenue Hoche, F-75008 Paris France 1997 Equity High Dividend USA River Road Asset Management LLC 462 South Fourth Street, Suite 1600 Louisville, Kentucky 40202-3466 USA 2005 Equity High Dividend Netherlands N.V. (formerly known Netherlands N.V.) 1982

7 Fortis L Fund Subfund Investment Managers Year Investment Manager started managing funds USA, Inc. 1979 Asia Ltd (formerly known as ABN AMRO Asset Management (Asia) Ltd) 1991 River Road Asset Management LLC 2005 Bond High Yield USA, Inc. UK Ltd 1979 1970 Bond Europe Plus Bond UK Ltd USA, Inc. 1970 1979 USA, Inc 1979 Real Estate Securities Netherlands N.V. (formerly known as Netherlands N.V.) 1982 Singapore Ltd. 1997 Note on Opportunities Subfund With respect to the Opportunities subfund, investors may wish to note that the Management Company has delegated the investment management functions to different Investment Managers whose management duties are divided according to the type of assets managed, namely, Fortis Investments USA Inc., for management of assets invested in world and U.S. equities; UK Ltd, for management of assets invested in emerging debt securities and corporate high yield debts denominated in euros; BNP

8 Paribas Investment Partners Netherlands N.V. (formerly known as Fortis Investment Management Netherlands N.V.) for management of assets invested in real estate (Europe); Singapore Ltd, for management of assets invested in real estate (Asia Pacific); Japan Ltd, for management of assets invested in equity of Japanese companies and Belgium S.A. (formerly known as Belgium S.A.) for management of all other assets not entrusted to any other Investment Managers. The subfund is not a fund of funds and its allocation and split over different assets classes is flexible. Based on the current asset allocation, Fortis Investments USA Inc. is submanaging a substantial portion of the assets of the subfund, i.e. about 45%, followed by Belgium S.A. (formerly known as Belgium S.A.) which is submanaging about 35% of the assets of the subfund. 5. Section 2.4 of the Singapore Prospectus By deleting the first paragraph of Section 2.4 of the Singapore Prospectus and replacing it with the following, with immediate effect:- The Company has appointed Singapore Limited (up to 30 April 2010) and BNP Paribas Asset Management Singapore Limited (as from 1 May 2010) whose registered address is at 20 Collyer Quay, #01-01 Tung Centre, Singapore 049319 and business address is at 16 Collyer Quay, #32-01 Hitachi Tower, Singapore 049318, as the representative of the Company in Singapore (the Singapore Representative ) to accept service of process on behalf of the Company. 6. Section 16 of the Singapore Prospectus By deleting the text of Section 16 of the Singapore Prospectus and replacing it with the following, with immediate effect:- Investors may contact the Singapore Representative at telephone number +65-62103999 to raise any queries regarding the Company or the subfunds of the Company.