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Foreign securities risk: The risk associated with investments in issuers located in foreign countries. The Fund’s investments in foreign securities may experience more rapid and extreme changes in value than investments in securities of U.S. issuers. The securities markets of many foreign countries are relatively small, with a limited number of issuers and a small number of securities. In addition, foreign companies often are not subject to the same degree of regulation as U.S. companies. Reporting, accounting and auditing standards of foreign countries differ, in some cases significantly, from U.S. standards. Nationalization, expropriation or confiscatory taxation, currency blockage, political changes or diplomatic developments can cause the value of the Fund’s non-U.S. investments to decline. In the event of nationalization, expropriation or other confiscation, the Fund could lose its entire foreign investment.

Management risk: The risk that a strategy used by the Fund’s portfolio managers may fail to produce the intended result.

Market risk: The risk that the market value of a security may move up and down, sometimes rapidly and unpredictably, based upon a change in an issuer’s financial condition, as well as overall market and economic conditions.

REITs risk: The real estate industry is particularly sensitive to economic downturns. Securities of companies in the real estate industry, including REITs, are sensitive to factors such as changes in real estate values, property taxes, interest rates, cash flow of underlying real estate assets, occupancy rates, government regulations affecting zoning, land use and rents, and the management skill and creditworthiness of the issuer. Companies in the real estate industry may also be subject to liabilities under environmental and hazardous waste laws. In addition, the value of a REIT is affected by changes in the value of the properties owned by the REIT or securing mortgage loans held by the REIT. REITs are dependent upon cash flow from their investments to repay financing costs and also on the ability of the REITs’ managers. The Fund will indirectly bear its proportionate share of expenses, including management fees, paid by each REIT in which it invests in addition to the expenses of the Fund.

Small-cap companies risk: Small-cap companies tend to have more limited markets and resources, and less liquidity, than companies with larger market capitalizations. Consequently, share prices of small-cap companies can be more volatile than, and perform differently from, larger capitalization company stocks.

For additional information, see the section “More About Risk.”

Evaluating the Fund’s Past Performance

The bar chart and table shown below give an indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual returns for the one-year, five-year and ten-year periods compare with those of several broad measures of market performance. The Fund’s past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.

The Fund uses multiple subadvisers. The performance results shown below reflect results achieved by previous subadvisers using different investment strategies. The Fund’s performance might have been different had the current subadvisory arrangements and investment strategies been in place for all periods shown.

The bar chart shows the Fund’s total returns for Class A shares for each of the last ten calendar years. The returns for Class B and Class C shares differ from the Class A returns shown in the bar chart to the extent their respective expenses differ. The chart does not reflect any sales charge that you may be required to pay when you buy or redeem the Fund’s shares. A sales charge will reduce your return.

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The table below shows how the Fund’s average annual total returns for Class A, Class B and Class C shares (before and after taxes for Class A) for the one-year, five-year and ten-year periods compare to those of the Standard & Poor’s 500 Index (“S&P 500 Index”), an unmanaged index of U.S. common stocks; the Dow Jones Wilshire 4500 Index, an unmanaged index of 4,500 mid- and small-sized companies; and the Standard & Poor’s MidCap 400 Index (“S&P MidCap 400 Index”), an unmanaged index of U.S. mid-sized companies. You may not invest directly in an index. The Fund’s total returns reflect, on a class by class basis, its expenses and the maximum sales charge that you may be required to pay when you buy or redeem the Fund’s shares. Class A total returns have also been calculated to reflect returns after taxes on distributions only and also returns after taxes on distributions and sales of Fund shares. The S&P 500 Index, Dow Jones Wilshire 4500 Index and S&P MidCap 400 Index returns have not been adjusted for ongoing management, distribution and operating expenses and sales charges applicable to mutual fund investments.

For information about Fund expenses, see the section “Fund Fees & Expenses.”

Natixis U.S. Diversified Portfolio — More on Investment Strategies

The Fund’s portfolio is divided into four different segments managed by the three subadvisers set forth below. These subadvisers pursue the Fund’s overall goal by employing the strategies and techniques described below.

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BlackRock

The segment of the Fund managed by BlackRock, under normal conditions, pursues long-term growth of capital. The segment primarily invests in a portfolio of common stocks of U.S. companies. The companies selected by BlackRock for the segment typically have the following characteristics:

The segment may also invest in the securities of foreign companies, either directly or indirectly through depositary receipts, as well as securities convertible into securities of foreign companies.

In making investment decisions, BlackRock generally employs the following methods:

Harris Associates

Under normal circumstances, the segment of the Fund managed by Harris Associates will invest primarily in the common stocks of large- and mid-capitalization companies that Harris Associates believes are trading at a substantial discount to the company’s “true business value.” Harris Associates’ value-oriented investment philosophy is based upon its belief that over time a stock’s discounted market price and its true business value will converge. Harris Associates believes that this philosophy provides the best opportunity to achieve long-term capital growth while also protecting from downside risk. It therefore uses this philosophy to locate companies with the following characteristics, although not all of the companies selected by Harris Associates will have each of these attributes:

In making investment decisions, Harris Associates generally employs the following methods:

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Loomis Sayles — Mid Cap Growth segment

Under normal circumstances, the Mid Cap Growth segment of the Fund, which is one of two segments of the Fund managed by Loomis Sayles, will invest primarily in common stocks with market capitalizations, at the time of investment, within the capitalization range of companies included in the Russell Midcap Growth Index, an unmanaged index of midcap companies within the Russell 1000 Growth Index. Loomis Sayles seeks securities with the following characteristics, although not all of the companies selected by Loomis Sayles will have each of the attributes:

In making investment decisions, Loomis Sayles employs the following methods:

Loomis Sayles — Small Cap Value segment

Under normal circumstances, the Small Cap Value segment of the Fund, the other segment of the Fund managed by Loomis Sayles, will invest primarily in common stocks with a market capitalization, at the time of the investment, within the range of the market capitalizations of those companies constituting the Russell 2500 Index. The Russell 2500 Index is an unmanaged index of the 2,500 smallest companies in the Russell 3000 Index. Loomis Sayles may also invest up to 35% of the Small Cap Value segment’s assets in companies with larger capitalization levels. Loomis Sayles seeks to achieve the objective of the Fund by emphasizing companies undervalued by the market in relation to earnings, dividends, assets, and growth prospects. This segment of the Fund is value-oriented with emphasis on security selection rather than sector rotation and market timing. The securities selected by Loomis Sayles for the segment typically have the following characteristics, although not all of the companies selected by Loomis Sayles will have each of the attributes:

Loomis Sayles will build a core portfolio of companies which, in its opinion, possess the attributes set forth above. It also invests a smaller portion of the segment’s assets in companies which it believes are undergoing a “special situation” or turn-around. These types of companies may have experienced business problems but, in the opinion of Loomis Sayles, have favorable prospects for recovery.

In making investment decisions, Loomis Sayles generally employs the following methods:

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Investment Goal

The Fund seeks capital appreciation. The Fund’s investment goal is non-fundamental, which means it may be changed without shareholder approval. The Fund will provide 60 day’s prior written notice to shareholders before changing the investment goal.

Principal Investment Strategies

The Fund, under normal market conditions, will invest at least 80% of its net assets (plus any borrowings made for investment purposes) in companies that, at the time of purchase, have market capitalizations within the capitalization range of the Russell 2000 Value Index, an unmanaged index that measures the performance of those Russell 2000 companies with lower price-to-book ratios and lower forecasted growth values. In accordance with applicable SEC requirements, the Fund will notify shareholders prior to any change to such policy taking effect. The Fund may, however, invest in companies with larger capitalizations.

Vaughan Nelson invests in small capitalization companies with a focus on absolute return. Vaughan Nelson uses a bottom-up value oriented investment process in constructing the Fund’s portfolio. Vaughan Nelson seeks companies with the following characteristics, although not all of the companies selected will have these attributes:

In selecting investments for the Fund, Vaughan Nelson generally employs the following strategies:

The Fund may also:

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