Prospectus by Investment Company (Form 497)

Supplement dated December 30, 2024 to the Loomis Sayles Funds Statements of Additional Information, dated February 1, 2024 and May 1, 2024, Natixis Funds Statements of Additional Information, dated February 1, 2024, April 1, 2024, May 1, 2024 and June 1, 2024, and the Natixis ETFs Statements of Additional Information, dated May 1, 2024, as may be revised or supplemented from time to time, for the following funds:

Effective January 1, 2025, the second paragraph in the sub-section "Trustee Fees" within the section "Management of the Trust(s)" in the Statements of Additional Information is hereby replaced with the following:

The Chairperson of the Board receives a retainer fee at the annual rate of $410,000. The Chairperson does not receive any meeting attendance fees for Board meetings or committee meetings that he attends. Each Trustee who is not an employee, officer or director of Natixis Advisors, the Distributor or their affiliates (other than the Chairperson) receives, in the aggregate, a retainer fee at the annual rate of $235,000. Each Trustee who is not an employee, officer or director of Natixis Advisors, the Distributor or their affiliates also receives a meeting attendance fee of $10,000 for each meeting of the Board that he or she attends in person and $5,000 for each meeting of the Board that he or she attends telephonically. In addition, the Chairperson of the Audit Committee and the Chairperson of the Contract Review Committee, each receive an additional retainer fee at an annual rate of $30,000. The Chairperson of the Governance Committee receives an additional retainer fee at an annual rate of $20,000. Each Contract Review Committee and Audit Committee member is compensated $6,000 for each committee meeting that he or she attends in person and $3,000 for each committee meeting that he or she attends telephonically. Each Governance Committee member is compensated $2,500 for each committee meeting that he or she attends. These fees are allocated among the funds in the Fund Complex based on a formula that takes into account, among other factors, the relative net assets of each mutual fund portfolio. Trustees are reimbursed for travel expenses in connection with attendance at meetings.