LOOMIS SAYLES GLOBAL MARKETS FUND

Supplement dated July 28, 2008, to the Natixis Funds Statement of

Additional Information—Part II (the “Statement”) dated February 1, 2008, as may be revised

or supplemented from time to time.

Effective immediately, the third paragraph within the section “Portfolio Holdings Information” is amended and restated as follows:

With respect to items (2) through (4) above, disclosure is made pursuant to procedures that have been approved by the Board of Trustees, and may be made by employees of each Fund’s adviser, administrator or custodian. With respect to (5) above, approval will be granted only when the officer determines that the Funds have a legitimate business reason for sharing the portfolio holdings information and the recipients are subject to a duty of confidentiality, including a duty not to trade on the information. As of the date of this Statement, the only entities that receive information pursuant to this exception are GCom2 (quarterly, or more frequently as needed, disclosure of full portfolio holdings) for the purpose of performing certain functions related to the production of the Funds’ semiannual financial statements, quarterly Form N-Q filing and other related items; Electra Information Systems, Inc. (daily disclosure of full portfolio holdings) for the purpose of performing certain electronic reconciliations; Bloomberg (daily disclosure of full portfolio holdings, provided next business day) for the purpose of performing attribution analysis; Lehman Point (periodic disclosure of full portfolio holdings) for the purpose of performing analytics and scenario analysis; Yield Book (periodic disclosure of full portfolio holdings) for the purpose of performing certain portfolio analytics for the adviser; and chartered accountants in India (daily disclosure of securities trades of India-based issuers, provided the next business day) for the purpose of performing certain duties for compliance with the India Income-Tax Act with respect to the Loomis Sayles Global Markets Fund. Although the Trust may enter into written confidentiality agreements, in other circumstances, such as those described in (4) above, the obligation to keep information confidential may be based on common law, professional or statutory duties of confidentiality. Common law, professional or statutory duties of confidentiality, including the duty not to trade on the information, may not be as clearly delineated and may be more difficult to enforce than contractual duties. The Funds’ officers determine on a case by case basis whether it is appropriate for the Funds to rely on such common law, professional or statutory duties. The Board of Trustees exercises oversight of the disclosure of portfolio holdings by, among other things, receiving and reviewing reports from each Fund’s chief compliance officer regarding any material issues concerning the Fund’s disclosure of portfolio holdings or from officers of the Fund in connection with proposed new exceptions or new disclosures pursuant to item (5) above. Notwithstanding the above, there is no assurance that the Funds’ policies on the sharing of portfolio holdings information will protect the Funds from the potential misuse of holdings by individuals or firms in possession of that information.

SP392-0708

M-LSSP101-0708