Price and Performance

Performance data shown represents past performance and is no guarantee of, and not necessarily indicative of, future results. Total return and value will vary and you may have a gain or loss when shares are sold. Current performance may be lower or higher than quoted. Performance for periods less than one year is cumulative, not annualized. Returns include changes in share price and reinvestment of dividends and capital gains, if any.

SALES CHARGES

Class A
Maximum sales charge – 5.75% for Alternatives (except Loomis Sayles Strategic Alpha Fund – 4.25%); Multi-Asset (except Loomis Sayles Multi-Asset Income Fund – 4.25%); Global Equity; International Equity; US Equity; ESG Investing (except Mirova Global Green Bond Fund – 4.25%); Low-Volatility Equity; Equity-Income (except Loomis Sayles Multi-Asset Income Fund – 4.25%). Maximum sales charge – 4.25% for ESG Investing (except Mirova Global Sustainable Equity Fund – 5.75%); Taxable Fixed Income (except Loomis Sayles Senior Floating Rate and Fixed Income Fund – 3.50%, Loomis Sayles Limited Term Government and Agency Fund – 2.25%); Maximum sales charge – 3.00% for Municipal Fixed Income.

Class C
Maximum contingent deferred sales charge (CDSC) – 1.00% for all Asset Classes

Class N, Y, Retail, Institutional, Investor, Admin and Advisor
No maximum sales charge – other fees and expenses apply.

When shown at NAV, Class A and C share performance does not reflect the deduction of the sales load. If reflected, the load would reduce the performance quoted.

IMPORTANT PERFORMANCE INFORMATION

ASG Global Alternatives Fund

• The Fund revised its investment strategies on October 31, 2018; performance prior to October 31, 2018 reflects the Fund's prior investment strategy and may have been different had the current investment strategies been in place for all periods shown.

Gateway Fund

• Class A – Prior to 02/15/08, performance is that of the predecessor fund, restated to reflect the sales loads of Class A shares.

Loomis Sayles Core Plus Bond Fund

• Class A – The maximum sales charge on purchases of Class A shares was reduced from 4.50% to 4.25% on November 2, 2015. The Fund’s returns for Class A shares have been restated to reflect the current maximum applicable sales charge of 4.25%.

Loomis Sayles High Income Fund

• Class A – The maximum sales charge on purchases of Class A shares was reduced from 4.50% to 4.25% on November 2, 2015. The Fund’s returns for Class A shares have been restated to reflect the current maximum applicable sales charge of 4.25%.

Loomis Sayles Inflation Protected Securities Fund

• Class Retail – Prior to the inception of Retail Class shares (5/28/10), performance is that of Institutional Class shares, restated to reflect the higher net expenses of Retail Class shares.

Loomis Sayles Intermediate Duration Bond Fund

• Class A – Effective August 31, 2016, the Fund's Retail Class shares were redesignated as Class A shares, restated to reflect the sales loads of Class A shares. Prior to the inception of Retail Class shares (5/28/10), performance is that of Institutional Class shares, restated to reflect the higher net expenses of Retail Class shares.
• Class C – Prior to the inception of Class C shares (August 31, 2016), performance is that of Retail Class shares, restated to reflect the higher net expenses and sales loads of Class C shares. Prior to the inception of Retail Class shares (5/28/10), performance is that of Institutional Class shares, restated to reflect the higher net expenses of Retail Class shares.

Loomis Sayles Investment Grade Bond Fund

• Class A – The maximum sales charge on purchases of Class A shares was reduced from 4.50% to 4.25% on November 2, 2015. The Fund’s returns for Class A shares have been restated to reflect the current maximum applicable sales charge of 4.25%.
• Class Admin – Prior to the inception of Admin Class shares (02/01/10), performance is that of Class A shares, restated to reflect the higher net expenses of Admin Class shares.

Loomis Sayles Limited Term Government and Agency Fund

• Class A – The maximum sales charge on purchases of Class A shares was reduced from 3.00% to 2.25% on November 2, 2015. The Fund’s returns for Class A shares have been restated to reflect the current maximum applicable sales charge of 2.25%.

Loomis Sayles Multi-Asset Income Fund

• Class A – The maximum sales charge on purchases of Class A shares was reduced from 4.50% to 4.25% on November 2, 2015. The Fund’s returns for Class A shares have been restated to reflect the current maximum applicable sales charge of 4.25%.
• Class Y – Prior to the inception of Class Y shares (12/3/2012), performance is that of Class A shares and reflects the higher net expenses of that share class.
• Prior to the stock market close August 31, 2015, the Fund had multiple subadvisors. The performance results shown above for the periods prior to the stock market close August 31, 2015 reflect results achieved by those subadvisors using different investment strategies.

Loomis Sayles Strategic Alpha Fund

• Class A – The maximum sales charge on purchases of Class A shares was reduced from 4.50% to 4.25% on November 2, 2015. The Fund’s returns for Class A shares have been restated to reflect the current maximum applicable sales charge of 4.25%.

Loomis Sayles Strategic Income Fund

• Class A – The maximum sales charge on purchases of Class A shares was reduced from 4.50% to 4.25% on November 2, 2015. The Fund’s returns for Class A shares have been restated to reflect the current maximum applicable sales charge of 4.25%.
• Class Admin – Prior to the inception of Admin Class shares (2/1/10), performance is that of Class A shares, restated to reflect the higher net expenses of Admin Class shares.

McDonnell Intermediate Municipal Bond Fund

• Class A – The maximum sales charge on purchases of Class A shares was reduced from 3.50% to 3.00% on November 2, 2015. The Fund’s returns for Class A shares have been restated to reflect the current maximum applicable sales charge of 3.00%.

Natixis Oakmark International Fund

• Class Y – Prior to the inception of Class Y shares (5/1/2017), performance is that of Class A shares and reflects the higher net expenses of that share class.

Before investing, consider the fund’s investment objectives, risks, charges, and expenses. You may obtain a prospectus or a summary prospectus on our website containing this and other information. Read it carefully.

Natixis Distribution, L.P. (fund distributor) and other fund families are affiliated.

Natixis Distribution, L.P. is a marketing agent for the Oakmark Funds, a limited purpose broker-dealer and the distributor of various registered investment companies for which advisory services are provided by affiliates of Natixis Investment Managers.