NATIXIS FUNDS

Supplement dated June 29, 2020 to the Natixis Funds Prospectuses dated February 1, 2020, April 1, 2020, May 1, 2020 and June 1, 2020 (each a “Prospectus”), as may be revised or supplemented from time to time, for the following funds:

AEW Global Focused Real Estate Fund AlphaSimplex Global Alternatives Fund	Loomis Sayles Limited Term Government and Agency Fund
AlphaSimplex Managed Futures Strategy Fund AlphaSimplex Multi-Asset Fund	Loomis Sayles Senior Floating Rate and Fixed Income Fund
AlphaSimplex Tactical U.S. Market Fund	Loomis Sayles Strategic Alpha Fund
Gateway Equity Call Premium Fund	Loomis Sayles Strategic Income Fund
Gateway Fund	Mirova Global Green Bond Fund
Loomis Sayles Core Plus Bond Fund	Mirova Global Sustainable Equity Fund
Loomis Sayles Global Allocation Fund	Mirova International Sustainable Equity Fund
Loomis Sayles Global Growth Fund	Natixis Oakmark Fund
Loomis Sayles Growth Fund	Natixis Oakmark International Fund
Loomis Sayles High Income Fund	Natixis U.S. Equity Opportunities Fund
Loomis Sayles Intermediate Duration Bond Fund	Vaughan Nelson Small Cap Value Fund
Loomis Sayles Intermediate Municipal Bond Fund	Vaughan Nelson Value Opportunity Fund
Loomis Sayles Investment Grade Bond Fund	Vaughan Nelson Select Fund

Effective June 30, 2020, the following information is added to the “Minimum Balance Policy” sub-section within the “How to Purchase Shares” section of each Prospectus:

Accounts held through certain financial intermediaries may be subject to a different minimum balance policy than the one described above. Please see Appendix A to the Prospectus for more information regarding the minimum balance policies of specific financial intermediaries, which may differ from those disclosed elsewhere in the Prospectus or in the SAI.

Effective June 30, 2020, the following information is restated within Appendix A – Intermediary Specific Information within each Prospectus:

Merrill Lynch

Shareholders purchasing Fund shares through a Merrill Lynch platform or account are eligible only for the following load waivers (front-end sales charge waivers and contingent deferred, or back-end, sales charge waivers) and discounts, which may differ from those disclosed elsewhere in this Prospectus or in the SAI.

Front-end Sales Load Waivers on Class A Shares available at Merrill Lynch

• Employer-sponsored retirement, deferred compensation and employee benefit plans (including health savings accounts) and trusts used to fund those plans, provided that the shares are not held in a commission-based brokerage account and shares are held for the benefit of the plan;

• Shares purchased by a 529 Plan (does not include 529 Plan units or 529-specific share classes or equivalents);

• Shares purchased through a Merrill Lynch affiliated investment advisory program;

• Shares exchanged due to the holdings moving from a Merrill Lynch affiliated investment advisory program to a Merrill Lynch brokerage (non-advisory) account pursuant to Merrill Lynch’s policies relating to sales load discounts and waivers

• Shares purchased by third party investment advisors on behalf of their advisory clients through Merrill Lynch’s platform;

• Shares of funds purchased through the Merrill Edge Self-Directed platform (if applicable);

• Shares purchased through reinvestment of capital gains distributions and dividend reinvestment when purchasing shares of the same fund (but not any other fund within the fund family);

• Shares exchanged from Class C (i.e., level-load) shares of the same fund pursuant to Merrill Lynch’s policies and procedures relating to sales load discounts and waivers;

• Employees and registered representatives of Merrill Lynch or its affiliates and their family members;

• Directors or Trustees of the Fund, and employees of the Fund’s investment adviser or any of its affiliates, as described in the Prospectus; and

• Eligible shares purchased from the proceeds of redemptions within the same fund family, provided (1) the repurchase occurs within 90 days following the redemption, (2) the redemption and purchase occur in the same account, and (3) redeemed shares were subject to a front-end or deferred sales load (known as Rights of Reinstatement). Automated transactions (i.e. systematic purchases and withdrawals) and purchases made after shares are automatically sold to pay Merrill Lynch’s account maintenance fees are not eligible for reinstatement.

CDSC Waivers on Class A and Class C Shares available at Merrill Lynch

• Death or disability of the shareholder;

• Shares sold as part of a systematic withdrawal plan as described in the Fund’s Prospectus;

• Return of excess contributions from an IRA account;

• Shares sold as part of a required minimum distribution for IRA and retirement accounts pursuant to the Internal Revenue Code;

• Shares sold to pay Merrill Lynch fees but only if the transaction is initiated by Merrill Lynch;

• Shares acquired through a right of reinstatement; and

• Shares held in retirement brokerage accounts, that are exchanged for a lower cost share class due to transfer to a fee based account or platform (applicable to Class A and C shares only).

• Shares received through an exchange due to the holdings moving from a Merrill Lynch affiliated investment advisory program to a Merrill Lynch brokerage (non-advisory) account pursuant to Merrill Lynch’s policies relating to sales load discounts and waivers.

Front-end load Discounts Available at Merrill Lynch: Breakpoints, Rights of Accumulation & Letters of Intent

• Breakpoints as described in this Prospectus;

• Rights of Accumulation (ROA) which entitle shareholders to breakpoint discounts as described in this prospectus will be automatically calculated based on the aggregated holding of fund family assets held by accounts (including 529 program holdings where applicable) within the purchaser’s household at Merrill Lynch. Eligible fund family assets not held at Merrill Lynch may be included in the ROA calculation only if the shareholder notifies his or her financial advisor about such assets; and

• Letters of Intent (LOI) which allow for breakpoint discounts based on anticipated purchases within a fund family, through Merrill Lynch, over a 13-month period of time (if applicable).