Investment Goal

Fund Fees & Expenses

Shareholder Fees

(fees paid directly from your investment)

Annual Fund Operating Expenses

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

Example

If shares are redeemed:

If shares are not redeemed:

Portfolio Turnover

Investments, Risks and Performance

Principal Investment Strategies

Principal Investment Risks

Risk/Return Bar Chart and Table

Total Returns for Class A Shares

Highest Quarterly Return:
Second Quarter 2009, 18.28%

Lowest Quarterly Return:
Fourth Quarter 2008, -18.23%

Average Annual Total Returns - (Loomis Sayles Multi-Asset Income Fund)	Past 1 Year	Past 5 Years		Past 10 Years		Life of Fund	Inception Date
Class A	5.46%	6.97%		5.44%
Class A \| Return After Taxes on Distributions	3.55%	5.85%		4.17%
Class A \| Return After Taxes on Distributions and Sale of Fund Shares	4.15%	5.14%		3.84%
Class C	8.27%	7.09%		5.09%
Class N	10.53%					9.33%	Aug. 31, 2015
Class T	7.38%	7.36%		5.63%
Class Y	10.38%	8.03%	^[1]	5.96%	^[1]
Bloomberg Barclays U.S. Aggregate Bond Index	2.65%	2.23%		4.34%		2.06%	Aug. 31, 2015

[1]	Prior to the inception of Class Y shares (12/3/12), performance is that of Class A shares and reflects the higher net expenses of that share class.

The Fund seeks long-term capital appreciation.

The following table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Natixis Fund Complex. More information about these and other discounts is available from your financial professional and in the section "How Sales Charges Are Calculated" on page 70 of the Prospectus, in Appendix A to the Prospectus and on page 117 in the section "Reduced Sales Charges" of the Statement of Additional Information ("SAI").

Shareholder Fees - (Mirova Global Sustainable Equity Fund) - USD ($)	Class A		Class C	Class N	Class T	Class Y
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	5.75%		none	none	2.50%	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, as applicable)	none	^[1]	1.00%	none	none	none
Redemption fees	none		none	none	none	none

[1]	A 1.00% contingent deferred sales charge ("CDSC") may apply to certain purchases of Class A shares of $1,000,000 or more that are redeemed within eighteen months of the date of purchase.

Annual Fund Operating Expenses - (Mirova Global Sustainable Equity Fund)		Class A	Class C	Class N		Class T		Class Y
Management fees		0.80%	0.80%	0.80%		0.80%		0.80%
Distribution and/or service (12b-1) fees		0.25%	1.00%	none		0.25%		none
Other expenses		0.67%	0.40%	0.40%	^[1]	0.67%	^[1]	0.41%
Total annual fund operating expenses		1.72%	2.20%	1.20%		1.72%		1.21%
Fee waiver and/or expense reimbursement	^[2],[3]	0.42%	0.15%	0.20%		0.42%		0.16%
Total annual fund operating expenses after fee waiver and/or expense reimbursement		1.30%	2.05%	1.00%		1.30%		1.05%

[1]	Other expenses are estimated for the current fiscal year.
[2]	NGAM Advisors has given a binding contractual undertaking to the Fund to reimburse any and all transfer agency expenses for Class N shares. This undertaking is in effect through April 30, 2018 and may be terminated before then only with the consent of the Fund's Board of Trustees.
[3]	Natixis Asset Management U.S., LLC ("Natixis AM US" or the "Adviser") has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses to 1.30%, 2.05%, 1.00%, 1.30% and 1.05% of the Fund's average daily net assets for Class A, C, N, T and Y shares, respectively, exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, organizational and extraordinary expenses, such as litigation and indemnification expenses. This undertaking is in effect through April 30, 2018 and may be terminated before then only with the consent of the Fund's Board of Trustees. The Adviser will be permitted to recover, on a class-by-class basis, management fees waived and/or expenses reimbursed to the extent that expenses in later periods fall below the applicable expense limitation for Class A, C, N, T and Y shares. The Fund will not be obligated to repay any such waived/reimbursed fees and expenses more than one year after the end of the fiscal year in which the fees or expenses were waived/reimbursed.

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 then redeem all of your shares at the end of those periods (except where indicated). The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same, except that the example is based on the Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement assuming that such waiver and/or reimbursement will only be in place through the date noted above and on the Total Annual Fund Operating Expenses for the remaining periods. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - (Mirova Global Sustainable Equity Fund) - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	700	1,047	1,418	2,456
Class C	308	674	1,166	2,522
Class N	102	361	640	1,437
Class T	379	735	1,118	2,193
Class Y	107	368	650	1,452

Expense Example, No Redemption - (Mirova Global Sustainable Equity Fund)	1 Year	3 Years	5 Years	10 Years
Class C \| USD ($)	208	674	1,166	2,522

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 for you if your Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the period March 31, 2016 through December 31, 2016, the Fund's portfolio turnover rate was 20% of the average value of its portfolio.

Under normal circumstances, the Fund invests at least 80% of its assets in equity securities, which may include common stocks, preferred stocks, depositary receipts and real estate investment trusts ("REITS"). The Fund invests in securities of companies located in no fewer than three countries, which may include the U.S. Under normal circumstances, the Fund will invest at least 40% of its assets in securities of companies located outside the U.S. and the Fund may invest up to 25% of its assets in securities of companies located in emerging markets. Emerging markets are economies that the Adviser believes are not generally recognized to be fully developed markets, as measured by gross national income, financial market infrastructure, market capitalization and/or other factors. The Fund may invest in growth and value companies of any size and may also invest in initial public offerings.

The Adviser pursues the Fund's investment goal by investing in equity securities of companies that it expects will benefit from major long-term global trends. The Adviser believes that there are several long-term trends that can reshape the world now and in the future. These trends include those that are demographic in nature, such as population growth and an aging population, and others that are more socioeconomic, such as urbanization, evolving consumption in emerging markets and a changing global financial model. In addition, there are environmental trends such as climate change and natural resource depletion, as well as trends driven by technological innovation. In selecting companies to invest in, the Adviser focuses on providers of solutions to the issues arising from these trends, as well as companies that provide products and services that address or are otherwise aligned with these trends and the need to create a more sustainable world.

The Adviser selects securities based on an in-depth fundamental analysis of companies combining qualitative, financial and environmental, social and governance ("ESG") considerations. The Adviser emphasizes company-specific positive selection criteria over broad-based negative screens in assessing ESG practices. This means that the Adviser's research process is designed to prioritize investments in companies which it believes show good ESG practices and whose products and services help create a more sustainable world, rather than merely excluding companies which the Adviser believes show poor ESG practices. Nevertheless, as ESG criteria are integrated in the Fund's risk management process, the Adviser also seeks to avoid investing in companies which do not comply with the Adviser's minimum ESG standards. In deciding which securities to buy and sell, the Adviser generally seeks to invest in securities of companies that:

relate to sustainable development themes derived from long-term global trends, providing solutions to address issues related to energy, mobility, building and cities, management of natural resources, consumption, healthcare, information technology or finance;

demonstrate adherence to ESG practices, with respect to such issues as fair labor, anti-corruption, human rights, fair business practices and mitigation of environmental impact;

have strong fundamentals, including sustainable business models, competitive positioning, effective management teams, acceptable risk profiles, and long-term growth potential; and

offer attractive valuations.

In determining whether or not a company's risk profile is acceptable, the Adviser seeks to evaluate risks that may affect share price in the long-term, such as market, environmental, exchange rate, political, and reputation risks, among others. If the risk profile of a company is too high, the investment team may decide not to invest and/or sell a security and look for alternatives.

It is expected that the Adviser's views on long-term global trends and sustainable development themes will evolve over time.

The principal risks of investing in the Fund are summarized below. The Fund does not represent a complete investment program. You may lose money by investing in the Fund.

Currency Risk: Fluctuations in the exchange rates between different currencies may negatively affect an investment. The Fund may be subject to currency risk because it invests in securities or other instruments denominated in, or that generate income denominated in, foreign currencies. The Fund may elect not to hedge currency risk, or may hedge such risk imperfectly, which may cause the Fund to incur losses that would not have been incurred had the risk been hedged.

Emerging Markets Risk: In addition to the risks of investing in foreign investments generally, emerging markets investments are subject to greater risks arising from political or economic instability, nationalization or confiscatory taxation, currency exchange restrictions, sanctions by the U.S. government and an issuer's unwillingness or inability to make principal or interest payments on its obligations. Emerging markets companies may be smaller and have shorter operating histories than companies in developed markets.

Equity Securities Risk: The value of the Fund's investments in equity securities could be subject to unpredictable declines in the value of individual securities and periods of below-average performance in individual securities or in the equity market as a whole. Securities issued in IPOs tend to involve greater market risk than other equity securities due, in part, to public perception and the lack of publicly available information and trading history. Growth stocks are generally more sensitive to market movements than other types of stocks primarily because their stock prices are based heavily on future expectations. If the Adviser's assessment of the prospects for a company's growth is wrong, or if the Adviser's judgment of how other investors will value the company's growth is wrong, then the price of the company's stock may fall or not approach the value that the Adviser has placed on it. Value stocks can perform differently from the market as a whole and from other types of stocks. Value stocks also present the risk that their lower valuations fairly reflect their business prospects and that investors will not agree that the stocks represent favorable investment opportunities, and they may fall out of favor with investors and underperform growth stocks during any given period. In the event an issuer is liquidated or declares bankruptcy, the claims of owners of the issuer's bonds generally take precedence over the claims of those who own preferred stock or common stock.

Foreign Securities Risk: Investments in foreign securities may be subject to greater political, economic, environmental, credit/counterparty and information risks. The Fund's investments in foreign securities also are subject to foreign currency fluctuations and other foreign currency-related risks. Foreign securities may be subject to higher volatility than U.S. securities, varying degrees of regulation and limited liquidity.

Large Investor Risk: Ownership of shares of the Fund may be concentrated in one or a few large investors. Such investors may redeem shares in large quantities or on a frequent basis. Redemptions by a large investor can affect the performance of the Fund, may increase realized capital gains, including short-term capital gains taxable as ordinary income, may accelerate the realization of taxable income to shareholders and may increase transaction costs. These transactions potentially limit the use of any capital loss carryforwards and certain other losses to offset future realized capital gains (if any). Such transactions may also increase the Fund's expenses.

Management Risk: A strategy used by the Fund's portfolio managers may fail to produce the intended result.

Market/Issuer Risk: The market value of the Fund's investments will move up and down, sometimes rapidly and unpredictably, based upon overall market and economic conditions, as well as a number of reasons that directly relate to the issuers of the Fund's investments, such as management performance, financial condition and demand for the issuers' goods and services.

REITs Risk: Investments in the real estate industry, including REITs, are particularly sensitive to economic downturns and are sensitive to factors such as changes in real estate values, property taxes and tax laws, 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 also may 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 mortgage loans held by the REIT. REITs are also subject to default and prepayment risk. Many REITs are highly leveraged, increasing their risk. 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- and Mid-Capitalization Companies Risk: Compared to large-capitalization companies, small- and mid-capitalization companies are more likely to have limited product lines, markets or financial resources. Stocks of these companies often trade less frequently and in limited volume and their prices may fluctuate more than stocks of large-capitalization companies. As a result, it may be relatively more difficult for the Fund to buy and sell securities of small- and mid-capitalization companies.

Sustainable Investment Style Risk: Because the Fund focuses on investments in companies that relate to certain sustainable development themes and demonstrate adherence to ESG practices, its universe of investments may be smaller than that of other funds and therefore the Fund may underperform the market as a whole if such investments underperform the market. The Fund may forgo opportunities to gain exposure to certain companies, industries, sectors or countries and it may choose to sell a security when it might otherwise be disadvantageous to do so.

Because the Fund has not yet completed a full calendar year, information related to Fund performance, including a bar chart showing annual returns, has not been included in this Prospectus. The performance information provided by the Fund in the future will give some indication of the risks of an investment 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 compare against those of a broad measure of market performance. The Fund's past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. Updated performance information is available online at ngam.natixis.com and/or by calling the Fund toll-free at 800-225-5478.

Investment Goal

Fund Fees & Expenses

Shareholder Fees

(fees paid directly from your investment)

Annual Fund Operating Expenses

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

Example

If shares are redeemed:

If shares are not redeemed:

Portfolio Turnover

Investments, Risks and Performance

Principal Investment Strategies

Principal Investment Risks

Risk/Return Bar Chart and Table

Total Returns for Class A Shares

Highest Quarterly Return:
First Quarter 2012, 17.17%

Lowest Quarterly Return:
Third Quarter 2011, -20.47%

Average Annual Total Returns - (Natixis Oakmark International Fund)	Past 1 Year	Past 5 Years	Life of Fund	Inception Date
Class A	1.97%	8.39%	4.43%	Dec. 15, 2010
Class A \| Return After Taxes on Distributions	1.71%	7.95%	4.10%	Dec. 15, 2010
Class A \| Return After Taxes on Distributions and Sale of Fund Shares	1.77%	6.80%	3.62%	Dec. 15, 2010
Class C	6.36%	8.89%	4.68%	Dec. 15, 2010
Class T	5.52%	9.13%	5.01%	Dec. 15, 2010
Class Y	8.19%	9.68%	5.45%	Dec. 15, 2010
MSCI World ex USA Index (Net)	2.75%	6.07%	3.00%	Dec. 15, 2010

The Fund seeks long-term growth of capital.

The following table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Natixis Fund Complex. More information about these and other discounts is available from your financial professional and in the section "How Sales Charges Are Calculated" on page 70 of the Prospectus, in Appendix A to the Prospectus and on page 117 in the section "Reduced Sales Charges" of the Statement of Additional Information ("SAI").

Shareholder Fees - (Natixis U.S. Equity Opportunities Fund) - USD ($)	Class A		Class C	Class N	Class T	Class Y
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	5.75%		none	none	2.50%	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, as applicable)	none	^[1]	1.00%	none	none	none
Redemption fees	none		none	none	none	none

[1]	A 1.00% contingent deferred sales charge ("CDSC") may apply to certain purchases of Class A shares of $1,000,000 or more that are redeemed within eighteen months of the date of purchase.

Annual Fund Operating Expenses - (Natixis U.S. Equity Opportunities Fund)		Class A	Class C	Class N		Class T		Class Y
Management fees		0.80%	0.80%	0.80%		0.80%		0.80%
Distribution and/or service (12b-1) fees		0.25%	1.00%	none		0.25%		none
Fee/expense recovery	^[1]	none	none	none		none		none
Remainder of other expenses		0.18%	0.18%	0.09%	^[2]	0.18%	^[2]	0.18%
Other expenses		0.18%	0.18%	0.09%		0.18%		0.18%
Total annual fund operating expenses		1.23%	1.98%	0.89%		1.23%		0.98%
Fee waiver and/or expense reimbursement	^[3],[4]	none	none	none		none		none
Total annual fund operating expenses after fee waiver and/or expense reimbursement		1.23%	1.98%	0.89%		1.23%		0.98%

[1]	The expense information in the table above includes fee/expense recovery of less than 0.01%.
[2]	Other expenses are estimated for the current fiscal year.
[3]	NGAM Advisors has given a binding contractual undertaking to the Fund to reimburse any and all transfer agency expenses for Class N shares. This undertaking is in effect through April 30, 2018 and may be terminated before then only with the consent of the Fund's Board of Trustees.
[4]	The Fund's investment adviser has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses to 1.25%, 2.00%, 0.95%, 1.25% and 1.00% of the Fund's average daily net assets for Class A, C, N, T and Y shares, respectively, exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, organizational and extraordinary expenses, such as litigation and indemnification expenses. This undertaking is in effect through April 30, 2018 and may be terminated before then only with the consent of the Fund's Board of Trustees. The Fund's investment adviser will be permitted to recover, on a class by class basis, management fees waived and/or expenses reimbursed to the extent that expenses in later periods fall below the applicable expense limitations for Class A, C, N, T and Y shares. The Fund will not be obligated to repay any such waived/reimbursed fees and expenses more than one year after the end of the fiscal year in which the fees or expenses were waived/reimbursed.

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 then redeem all of your shares at the end of those periods (except where indicated). The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - (Natixis U.S. Equity Opportunities Fund) - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	693	943	1,212	1,978
Class C	301	621	1,068	2,306
Class N	91	284	493	1,096
Class T	372	631	909	1,702
Class Y	100	312	542	1,201

Expense Example, No Redemption - (Natixis U.S. Equity Opportunities Fund)	1 Year	3 Years	5 Years	10 Years
Class C \| USD ($)	201	621	1,068	2,306

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 for you if your Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During its most recently ended fiscal year, the Fund's portfolio turnover rate was 17% of the average value of its portfolio.

The Fund ordinarily invests at least 80% of its net assets (plus any borrowings made for investment purposes) in equity securities, including common stocks and preferred stocks. Under normal market conditions, the Fund will invest at least 80% of its net assets (plus any borrowings made for investment purposes) in securities of U.S. issuers. The Fund's approach to equity investing combines the styles of two subadvisers in selecting securities for each of the Fund's segments. The segments and their subadvisers are listed below.

Harris Associates - Large Cap Value segment - Under normal circumstances, the Large Cap Value segment of the Fund managed by Harris Associates L.P. ("Harris Associates") will invest primarily in the common stocks of larger- capitalization companies that Harris Associates believes are trading at a substantial discount to the company's "true business value." By "true business value," Harris Associates means its estimate of the price a knowledgeable buyer would pay to acquire the entire business. Harris Associates believes that investing in securities priced significantly below their true business value presents the best opportunity to achieve the Fund's investment objectives. Harris Associates usually sells a security when the price approaches its estimated worth and monitors each holding and adjusts its price targets as warranted to reflect changes in the issuer's fundamentals. In determining whether an issuer is a U.S or foreign issuer for the Harris Associates – Large Cap Value segment, Harris Associates considers various factors, including its country of domicile, the primary stock exchange on which it trades, the location from which the majority of its revenue comes, and its reporting currency.
Loomis Sayles - All Cap Growth segment - Under normal circumstances, the All Cap Growth segment of the Fund, managed by Loomis, Sayles & Company, L.P. ("Loomis Sayles"), will invest primarily in equity securities, including common stocks, preferred stocks, convertible securities and warrants. This segment may invest in companies of any size. The segment normally invests across a wide range of sectors and industries. The segment's portfolio manager employs a growth style of equity management that emphasizes companies with sustainable competitive advantages, long-term structural growth drivers, attractive cash flow returns on invested capital, and management teams focused on creating long-term value for shareholders. The segment's portfolio manager aims to invest in companies when they trade at a significant discount to the estimate of intrinsic value. The segment will consider selling a portfolio investment when the portfolio manager believes an unfavorable structural change occurs within a given business or the markets in which it operates, a critical underlying investment assumption is flawed, when a more attractive reward-to-risk opportunity becomes available, when the portfolio manager believes the current price fully reflects intrinsic value, or for other investment reasons which the portfolio manager deems appropriate. Although certain equity securities purchased by the Loomis Sayles – All Cap Growth segment of the Fund may be issued by domestic companies incorporated outside of the United States, Loomis Sayles does not consider these securities to be foreign if they are included in the U.S. equity indices published by S&P Global Ratings or Russell Investments or if the security's country of risk defined by Bloomberg is the United States.

Subject to the allocation policy adopted by the Fund's Board of Trustees, NGAM Advisors, L.P. ("NGAM Advisors") generally allocates capital invested in the Fund equally (i.e., 50%) between its two segments. Under the allocation policy, NGAM Advisors may also allocate capital away from or towards each segment from time to time and may reallocate capital between the segments. Each subadviser manages its segment of the Fund's assets in accordance with its distinct investment style and strategy.

The Fund may also:

Invest in securities offered in initial public offerings ("IPOs") and securities issued pursuant to Rule 144A under the Securities Act of 1933 ("Rule 144A securities").
Invest in convertible preferred stock and convertible debt securities.
Invest in real estate investment trusts ("REITs").
Invest in fixed-income securities, including U.S. government bonds and below-investment grade fixed-income securities (commonly known as "junk bonds").
Hold securities of foreign issuers traded over-the-counter or on foreign exchanges, including securities in emerging markets and related currency hedging transactions.
Invest in equity securities of Canadian issuers.

The principal risks of investing in the Fund are summarized below. The Fund does not represent a complete investment program. You may lose money by investing in the Fund.

Allocation Risk: The Fund's investment performance depends on how its assets are allocated. The allocation, as set forth above, may not be optimal in every market condition. You could lose money on your investment in the Fund as a result of this allocation.

Credit Risk: Credit risk is the risk that the issuer or the guarantor of a fixed-income security, or the counterparty to a derivatives or other transaction, will be unable or unwilling to make timely payments of interest or principal or to otherwise honor its obligations.

Emerging Markets Risk: In addition to the risks of investing in foreign investments generally, emerging markets investments are subject to greater risks arising from political or economic instability, nationalization or confiscatory taxation, currency exchange restrictions, sanctions by the U.S. government and an issuer's unwillingness or inability to make principal or interest payments on its obligations. Emerging markets companies may be smaller and have shorter operating histories than companies in developed markets.

Equity Securities Risk: The value of the Fund's investments in equity securities could be subject to unpredictable declines in the value of individual securities and periods of below-average performance in individual securities or in the equity market as a whole. Securities issued in IPOs tend to involve greater market risk than other equity securities due, in part, to public perception and the lack of publicly available information and trading history. Growth stocks are generally more sensitive to market movements than other types of stocks primarily because their stock prices are based heavily on future expectations. If the subadviser's assessment of the prospects for a company's growth is wrong, or if the subadviser's judgment of how other investors will value the company's growth is wrong, then the price of the company's stock may fall or not approach the value that the subadviser has placed on it. Value stocks can perform differently from the market as a whole and from other types of stocks. Value stocks also present the risk that their lower valuations fairly reflect their business prospects and that investors will not agree that the stocks represent favorable investment opportunities, and they may fall out of favor with investors and underperform growth stocks during any given period. In the event an issuer is liquidated or declares bankruptcy, the claims of owners of the issuer's bonds generally take precedence over the claims of those who own preferred stock or common stock.

Foreign Securities Risk: Investments in foreign securities may be subject to greater political, economic, environmental, credit/counterparty and information risks. The Fund's investments in foreign securities also are subject to foreign currency fluctuations and other foreign currency-related risks. Foreign securities may be subject to higher volatility than U.S. securities, varying degrees of regulation and limited liquidity.

Liquidity Risk: Liquidity risk is the risk that the Fund may be unable to find a buyer for its investments when it seeks to sell them or to receive the price it expects. Decreases in the number of financial institutions willing to make markets in the Fund's investments or in their capacity or willingness to transact may increase the Fund's exposure to this risk. Events that may lead to increased redemptions, such as market disruptions or increases in interest rates, may also negatively impact the liquidity of the Fund's investments when it needs to dispose of them. If the Fund is forced to sell its investments at an unfavorable time and/or under adverse conditions in order to meet redemption requests, such sales could negatively affect the Fund. Securities acquired in a private placement, such as Rule 144A securities, are generally subject to greater liquidity risk because they are subject to strict restrictions on resale and there may be no liquid secondary market or ready purchaser for such securities. Non-exchange traded derivatives are generally subject to greater liquidity risk as well. Liquidity issues may also make it difficult to value the Fund's investments.

Management Risk: A strategy used by the Fund's portfolio managers may fail to produce the intended result.

Market/Issuer Risk: The market value of the Fund's investments will move up and down, sometimes rapidly and unpredictably, based upon overall market and economic conditions, as well as a number of reasons that directly relate to the issuers of the Fund's investments, such as management performance, financial condition and demand for the issuers' goods and services.

REITs Risk: Investments in the real estate industry, including REITs, are particularly sensitive to economic downturns and are sensitive to factors such as changes in real estate values, property taxes and tax laws, 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 also may 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 mortgage loans held by the REIT. REITs are also subject to default and prepayment risk. Many REITs are highly leveraged, increasing their risk. 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- and Mid-Capitalization Companies Risk: Compared to large-capitalization companies, small- and mid-capitalization companies are more likely to have limited product lines, markets or financial resources. Stocks of these companies often trade less frequently and in limited volume and their prices may fluctuate more than stocks of large-capitalization companies. As a result, it may be relatively more difficult for the Fund to buy and sell securities of small- and mid-capitalization companies.

The following bar chart and table provide some 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 to those of two broad measures of market performance. The Russell 1000® Index is an unmanaged index that measures the performance of the large-capitalization segment of the U.S. equity universe. A subset of the Russell 3000® Index, it includes approximately 1,000 of the largest stocks based on a combination of market capitalization and current index membership. The Fund's past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. Updated performance information is available online at ngam.natixis.com and/or by calling the Fund toll-free at 800-225-5478.

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.

Average Annual Total Returns

(for the periods ended December 31, 2016)

The Fund uses multiple subadvisers. The performance results shown above reflect results achieved by previous subadvisers using different investment strategies.

The Fund did not have Class N or Class T shares outstanding during the periods shown above. The returns of Class N and Class T shares would have been substantially similar to the returns of the Fund's other share classes because they would have been invested in the same portfolio of securities and would only differ to the extent the other share classes did not have the same expenses. Performance of Class T shares shown above is that of Class A shares, which have the same expenses as Class T shares, restated to reflect the different sales load applicable to Class T shares. Prior to May 1, 2017, Total Returns in the bar chart and Return After Taxes on Distributions and Return After Taxes on Distributions & Sale of Fund Shares in the table were presented for Class A shares; such returns are now presented for Class Y shares, the largest share class in the Natixis Fund Complex.

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-advantaged arrangements, such as 401(k) plans, qualified plans, education savings accounts, such as 529 plans, or individual retirement accounts. The after-tax returns are shown for only one class of the Fund. After-tax returns for the other classes of the Fund will vary. Index performance reflects no deduction for fees, expenses or taxes.

Investment Goal

Fund Fees & Expenses

The following table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Natixis Fund Complex. More information about these and other discounts is available from your financial professional and in the section "How Sales Charges Are Calculated" on page 70 of the Prospectus, in Appendix A to the Prospectus and on page 117 in the section "Reduced Sales Charges" of the Statement of Additional Information ("SAI").

Shareholder Fees - (Vaughan Nelson Small Cap Value Fund) - USD ($)	Class A		Class C	Class N	Class T	Class Y
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	5.75%		none	none	2.50%	none
Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, as applicable)	none	^[1]	1.00%	none	none	none
Redemption fees	none		none	none	none	none

[1]	A 1.00% contingent deferred sales charge ("CDSC") may apply to certain purchases of Class A shares of $1,000,000 or more that are redeemed within eighteen months of the date of purchase.

Annual Fund Operating Expenses - (Vaughan Nelson Small Cap Value Fund)		Class A	Class C	Class N		Class T		Class Y
Management fees		0.90%	0.90%	0.90%		0.90%		0.90%
Distribution and/or service (12b-1) fees		0.25%	1.00%	none		0.25%		none
Other expenses		0.20%	0.20%	0.11%	^[1]	0.20%	^[1]	0.20%
Acquired fund fees and expenses	^[2]	0.18%	0.18%	0.18%		0.18%		0.18%
Total annual fund operating expenses		1.53%	2.28%	1.19%		1.53%		1.28%
Fee waiver and/or expense reimbursement	^[3],[4]	none	none	none		none		none
Total annual fund operating expenses after fee waiver and/or expense reimbursement		1.53%	2.28%	1.19%		1.53%		1.28%

[1]	Other expenses are estimated for the current fiscal year.
[2]	The expense information shown in the table above differs from the expense information disclosed in the Fund's financial highlights table because the financial highlights table reflects the operating expenses of the Fund and does not include acquired fund fees and expenses.
[3]	NGAM Advisors has given a binding contractual undertaking to the Fund to reimburse any and all transfer agency expenses for Class N shares. This undertaking is in effect through April 30, 2018 and may be terminated before then only with the consent of the Fund's Board of Trustees.
[4]	The Fund's investment adviser has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses to 1.45%, 2.20%,1.15%, 1.45% and 1.20% of the Fund's average daily net assets for Class A, C, N, T and Y shares, respectively, exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, organizational and extraordinary expenses, such as litigation and indemnification expenses. This undertaking is in effect through April 30, 2018 and may be terminated before then only with the consent of the Fund's Board of Trustees. The Fund's investment adviser will be permitted to recover, on a class by class basis, management fees waived and/or expenses reimbursed to the extent that expenses in later periods fall below the applicable expense limitations for Class A, C, N, T and Y shares. The Fund will not be obligated to repay any such waived/reimbursed fees and expenses more than one year after the end of the fiscal year in which the fees or expenses were waived/reimbursed.

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 then redeem all your shares at the end of those periods (except where indicated). The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - (Vaughan Nelson Small Cap Value Fund) - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	722	1,031	1,361	2,294
Class C	331	712	1,220	2,615
Class N	121	378	654	1,443
Class T	402	721	1,063	2,028
Class Y	130	406	702	1,545

Expense Example, No Redemption - (Vaughan Nelson Small Cap Value Fund)	1 Year	3 Years	5 Years	10 Years
Class C \| USD ($)	231	712	1,220	2,615

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 for you if your Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During its most recently ended fiscal year, the Fund's portfolio turnover rate was 74% of the average value of its portfolio.

The Fund normally will invest at least 80% of its net assets (plus any borrowings made for investment purposes) in the equity securities, including common stocks and preferred stocks, of "small-capitalization companies." Equity securities may take the form of stock in corporations, limited partnership interests, interests in limited liability companies, real estate investment trusts ("REITs") or other trusts and other similar securities. Currently, the Fund defines a small-capitalization company to be one whose market capitalization, at the time of purchase, either falls 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, or is $3.5 billion or less. While the market capitalization range for the Russell 2000® Value Index fluctuates, at December 31, 2016, it was $35.6 million to $10.3 billion. The Fund may, however, invest in companies with large- capitalizations.

Vaughan Nelson Investment Management, L.P. ("Vaughan Nelson") invests in small-capitalization companies with a focus on those companies meeting Vaughan Nelson's return expectations. 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:

Companies earning a positive return on capital with stable-to-improving returns.
Companies valued at a discount to their asset value.
Companies with an attractive and sustainable dividend level.

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

Value-driven investment philosophy that selects stocks selling at a relatively low value based on discounted cash flow models. Vaughan Nelson selects companies that it believes are out of favor or misunderstood.
Vaughan Nelson starts with an investment universe of 5,000 securities. Vaughan Nelson then uses value-driven screens to create a research universe of companies with market capitalizations of at least $100 million.
Vaughan Nelson uses fundamental analysis to construct a portfolio of 60 to 80 securities that, in the opinion of Vaughan Nelson, is made up of quality companies with the potential to provide significant increases in share price over a three year period.
Vaughan Nelson will generally sell a security when it reaches Vaughan Nelson's price target or when the issuer shows a change in financial condition, competitive pressures, poor management decisions or internal or external forces reducing future expected returns from the investment thesis.

The Fund may also:

Invest in convertible preferred stock and convertible debt securities.
Invest in foreign securities, including emerging market securities.
Invest in REITs.
Invest in securities offered in initial public offerings ("IPOs").

The principal risks of investing in the Fund are summarized below. The Fund does not represent a complete investment program. You may lose money by investing in the Fund.

Emerging Markets Risk: In addition to the risks of investing in foreign investments generally, emerging markets investments are subject to greater risks arising from political or economic instability, nationalization or confiscatory taxation, currency exchange restrictions, sanctions by the U.S. government and an issuer's unwillingness or inability to make principal or interest payments on its obligations. Emerging markets companies may be smaller and have shorter operating histories than companies in developed markets.

Equity Securities Risk: The value of the Fund's investments in equity securities could be subject to unpredictable declines in the value of individual securities and periods of below-average performance in individual securities or in the equity market as a whole. Securities issued in IPOs tend to involve greater market risk than other equity securities due, in part, to public perception and the lack of publicly available information and trading history. Value stocks can perform differently from the market as a whole and from other types of stocks. Value stocks also present the risk that their lower valuations fairly reflect their business prospects and that investors will not agree that the stocks represent favorable investment opportunities, and they may fall out of favor with investors and underperform growth stocks during any given period. In the event an issuer is liquidated or declares bankruptcy, the claims of owners of the issuer's bonds generally take precedence over the claims of those who own preferred stock or common stock.

Foreign Securities Risk: Investments in foreign securities may be subject to greater political, economic, environmental, credit/counterparty and information risks. The Fund's investments in foreign securities also are subject to foreign currency fluctuations and other foreign currency-related risks. Foreign securities may be subject to higher volatility than U.S. securities, varying degrees of regulation and limited liquidity.

Liquidity Risk: Liquidity risk is the risk that the Fund may be unable to find a buyer for its investments when it seeks to sell them or to receive the price it expects. Decreases in the number of financial institutions willing to make markets in the Fund's investments or in their capacity or willingness to transact may increase the Fund's exposure to this risk. Events that may lead to increased redemptions, such as market disruptions or increases in interest rates, may also negatively impact the liquidity of the Fund's investments when it needs to dispose of them. If the Fund is forced to sell its investments at an unfavorable time and/or under adverse conditions in order to meet redemption requests, such sales could negatively affect the Fund. Liquidity issues may also make it difficult to value the Fund's investments.

Management Risk: A strategy used by the Fund's portfolio managers may fail to produce the intended result.

Market/Issuer Risk: The market value of the Fund's investments will move up and down, sometimes rapidly and unpredictably, based upon overall market and economic conditions, as well as a number of reasons that directly relate to the issuers of the Fund's investments, such as management performance, financial condition and demand for the issuers' goods and services.

REITs Risk: Investments in the real estate industry, including REITs, are particularly sensitive to economic downturns and are sensitive to factors such as changes in real estate values, property taxes and tax laws, 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 also may 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 mortgage loans held by the REIT. REITs are also subject to default and prepayment risk. Many REITs are highly leveraged, increasing their risk. 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-Capitalization Companies Risk: Small-capitalization companies are more likely than larger companies to have limited product lines, markets or financial resources, or to depend on a small, inexperienced management group. Stocks of these companies often trade less frequently and in limited volume and their prices may fluctuate more than stocks of larger companies. Stocks of small-capitalization companies may therefore be more vulnerable to adverse developments than those of larger companies.

The following bar chart and table provide some 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 to those of a broad measure of market performance. The Fund's past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. Updated performance information is available online at ngam.natixis.com and/or by calling the Fund toll-free at 800-225-5478.

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.

Average Annual Total Returns

(for the periods ended December 31, 2016)

The Fund did not have Class N or Class T shares outstanding during the periods shown above. The returns of Class N and Class T shares would have been substantially similar to the returns of the Fund's other share classes because they would have been invested in the same portfolio of securities and would only differ to the extent the other share classes did not have the same expenses. Performance of Class T shares shown above is that of Class A shares, which have the same expenses as Class T shares, restated to reflect the different sales load applicable to Class T shares. Prior to May 1, 2017, Total Returns in the bar chart and Return After Taxes on Distributions and Return After Taxes on Distributions & Sale of Fund Shares in the table were presented for Class A shares; such returns are now presented for Class Y shares, the largest share class in the Natixis Fund Complex.

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-advantaged arrangements, such as 401(k) plans, qualified plans, education savings accounts, such as 529 plans, or individual retirement accounts. The after-tax returns are shown for only one class of the Fund. After-tax returns for the other classes of the Fund will vary. Index performance reflects no deduction for fees, expenses or taxes.