0000052136 2025-12-31 2025-12-31 0000052136 nftii:S000008033Member 2025-12-31 2025-12-31 0000052136 nftii:S000008033Member nftii:C000021802Member 2025-12-31 2025-12-31 0000052136 nftii:S000008033Member nftii:C000021804Member 2025-12-31 2025-12-31 0000052136 nftii:S000008033Member nftii:C000021805Member 2025-12-31 2025-12-31 0000052136 nftii:S000008033Member nftii:C000190720Member 2025-12-31 2025-12-31 0000052136 nftii:S000023783Member 2025-12-31 2025-12-31 0000052136 nftii:S000023783Member nftii:C000069913Member 2025-12-31 2025-12-31 0000052136 nftii:S000023783Member nftii:C000069914Member 2025-12-31 2025-12-31 0000052136 nftii:S000023783Member nftii:C000069915Member 2025-12-31 2025-12-31 0000052136 nftii:S000023783Member nftii:C000128764Member 2025-12-31 2025-12-31 iso4217:USD pure false 497 0000052136 Natixis Funds Trust II N-1A 2025-12-31 <div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:center;"><span style="font-style:italic">Supplement dated July 1, 2026 to the Prospectus, dated May 1, 2026, </span></div><div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:center;"><span style="font-style:italic">as may be revised or supplemented from time to time, for the following fund: </span></div><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;text-align:center;">NATIXIS OAKMARK FUND </div><div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;text-align:center;">(the “Fund”) </div><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;">Effective immediately, the Fund’s Board of Trustees approved a proposal to reduce the advisory fee rate to 0.59% on all assets. </div><div style="margin-top:18pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;"><span style="font-style:italic">Accordingly, the Annual Fund Operating Expenses table and the Example table within the section “Fund Fees &amp; Expenses” are amended and restated as follows with respect to the Fund: </span></div><div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;">Annual Fund Operating Expenses </div><div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;"><span style="font-style:italic">(expenses that you pay each year as a percentage of the value of your investment) </span></div> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;width:92%;border-spacing:0px;margin:0 auto"> <tr> <td style="width:72%;"></td> <td style="vertical-align:bottom;width:5%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:4%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:4%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:4%;"></td> <td></td> <td></td> <td></td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:8pt"> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class A</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class C</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class N</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class Y</span></td> <td style="vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Management fees<sup style="font-size:75%;vertical-align:top">1</sup></div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.59</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.59</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.59</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.59</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Distribution and/or service (12b‑1) fees</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.25</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Other expenses</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.18</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.18</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.16</td> <td style="white-space:nowrap;vertical-align:bottom;">%<sup style="font-size:75%;vertical-align:top">2</sup> </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.18</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Total annual fund operating expenses</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.02</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.77</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.75</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.77</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Fee waiver and/or expense reimbursement<sup style="font-size:75%;vertical-align:top">3,4</sup></div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.02</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="font-size:1px"> <td style="vertical-align:bottom;"></td> <td style="vertical-align:bottom;">  </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Total annual fund operating expenses after fee waiver and/or expense reimbursement</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.02</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.77</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.73</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.77</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="font-size:1px"> <td style="vertical-align:bottom;"></td> <td style="vertical-align:bottom;">  </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;border-spacing:0px;width:100%"> <tr style="page-break-inside:avoid"> <td style="width:4%;vertical-align:top;text-align:left;"><sup style="font-size:75%;vertical-align:top">1</sup> </td> <td style="vertical-align:top;text-align:left;"> <div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:left;">The Fund’s operating expenses have been restated to reflect a reduction in management fees, effective as of July 1, 2026, as if reduction had been in effect during the fiscal year ended December 31, 2025. The information has been restated to better reflect anticipated expenses of the Fund. </div> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;border-spacing:0px;width:100%"> <tr style="page-break-inside:avoid"> <td style="width:4%;vertical-align:top;text-align:left;"><sup style="font-size:75%;vertical-align:top">2</sup> </td> <td style="vertical-align:top;text-align:left;"> <div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:left;">Pursuant to an expense offset arrangement, credits realized as a result of uninvested cash balances may be used to reduce the Fund’s transfer agent expenses. Other expenses are shown net of such reductions of transfer agent expenses of 2 bps. </div> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;border-spacing:0px;width:100%"> <tr style="page-break-inside:avoid"> <td style="width:4%;vertical-align:top;text-align:left;"><sup style="font-size:75%;vertical-align:top">3</sup> </td> <td style="vertical-align:top;text-align:left;"> <div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:left;">The Natixis Advisors, LLC (“Natixis Advisors”) has given a binding contractual undertaking to the Fund to limit the amount of the Fund’s total annual fund operating expenses to 1.03%, 1.78%, 0.73% and 0.78% of the Fund’s average daily net assets for Class A, C, N, 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, 2027 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 both (1) the class’ applicable expense limitation at the time such amounts were waived/reimbursed and (2) the class’ current applicable expense limitation. 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. </div> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;border-spacing:0px;width:100%"> <tr style="page-break-inside:avoid"> <td style="width:4%;vertical-align:top;text-align:left;"><sup style="font-size:75%;vertical-align:top">4</sup> </td> <td style="vertical-align:top;text-align:left;"> <div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:left;">Natixis 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, 2027 and may be terminated before then only with the consent of the Fund’s Board of Trustees. </div> </td> </tr> </table><div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;">Example </div><div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;">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 for Class N 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 dates noted above and on the Total Annual Fund Operating Expenses for the remaining periods. The example for Class C shares for the ten‑year period reflects the conversion to Class A shares after eight years. The example does not take into account brokerage commissions and other fees to financial intermediaries that you may pay on your purchases and sales of shares of the Fund. Although your actual costs may be higher or lower, based on these assumptions your costs would be: </div> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;width:92%;border-spacing:0px;margin:0 auto"> <tr> <td style="width:74%;"></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:8pt"> <td style="vertical-align:bottom;white-space:nowrap;"> <span style="margin-top:0pt;margin-bottom:0pt;border-bottom:1.00pt solid #000000;display:table-cell;font-size:8pt;font-family:times new roman;font-weight:bold">If shares are redeemed:</span></td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">1 year</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">3 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">5 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">10 years</span></td> <td style="vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class A</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">673</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">881</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,106</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,751</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class C</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">280</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">557</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">959</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,886</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class N</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">77</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">240</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">417</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">930</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class Y</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">79</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">246</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">428</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">954</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:8pt;width:92%;border-spacing:0px;margin:0 auto"> <tr> <td style="width:75%;"></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:8pt"> <td style="vertical-align:bottom;white-space:nowrap;"> <span style="margin-top:0pt;margin-bottom:0pt;border-bottom:1.00pt solid #000000;display:table-cell;font-size:8pt;font-family:times new roman;font-weight:bold">If shares are not redeemed:</span></td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">1 year</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">3 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">5 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">10 years</span></td> <td style="vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class C</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">180</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">557</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">959</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,886</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> </table><div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:center;"><span style="font-style:italic">Supplement dated July 1, 2026 to the Prospectus, dated May 1, 2026, </span></div><div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:center;"><span style="font-style:italic">as may be revised or supplemented from time to time, for the following fund: </span></div><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;text-align:center;">VAUGHAN NELSON MID CAP FUND </div><div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;text-align:center;">(the “Fund”) </div><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;">Effective immediately, Natixis Advisors, LLC has given a binding contractual undertaking to the Fund to limit the amount of the Fund’s total annual fund operating expenses to 1.10%, 1.85%, 0.80% and 0.85% of the Fund’s average daily net assets for Class A, Class C, Class N, and Class 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, 2028. </div><div style="margin-top:18pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;"><span style="font-style:italic">Accordingly, the Annual Fund Operating Expenses table and the Example table within the section “Fund Fees &amp; Expenses” are amended and restated as follows with respect to the Fund: </span></div><div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;">Annual Fund Operating Expenses </div><div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;"><span style="font-style:italic">(expenses that you pay each year as a percentage of the value of your investment) </span></div> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;width:92%;border-spacing:0px;margin:0 auto"> <tr> <td style="width:71%;"></td> <td style="vertical-align:bottom;width:5%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:4%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:4%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:4%;"></td> <td></td> <td></td> <td></td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:8pt"> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class A</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class C</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class N</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class Y</span></td> <td style="vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Management fees</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.75</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.75</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.75</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.75</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Distribution and/or service (12b‑1) fees</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.25</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Other expenses</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.27</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.27</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.17</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.27</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Total annual fund operating expenses</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.27</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">2.02</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.92</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.02</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Fee waiver and/or expense reimbursement<sup style="font-size:75%;vertical-align:top">1,2</sup></div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.17</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.17</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.12</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.17</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="font-size:1px"> <td style="vertical-align:bottom;"></td> <td style="vertical-align:bottom;">  </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Total annual fund operating expenses after fee waiver and/or expense reimbursement</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.10</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.85</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.80</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.85</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="font-size:1px"> <td style="vertical-align:bottom;"></td> <td style="vertical-align:bottom;">  </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;border-spacing:0px;width:100%"> <tr style="page-break-inside:avoid"> <td style="width:4%;vertical-align:top;text-align:left;"><sup style="font-size:75%;vertical-align:top">1</sup> </td> <td style="vertical-align:top;text-align:left;"> <div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:left;">Natixis Advisors, LLC (“Natixis Advisors” 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 1.10%, 1.85%, 0.80%, and 0.85% of the Fund’s average daily net assets for Class A, Class C, Class N, and Class 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, 2028 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 both (1) the class’ applicable expense limitation at the time such amounts were waived/reimbursed and (2) the class’ current applicable expense limitation. 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.</div> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;border-spacing:0px;width:100%"> <tr style="page-break-inside:avoid"> <td style="width:4%;vertical-align:top;text-align:left;"><sup style="font-size:75%;vertical-align:top">2</sup> </td> <td style="vertical-align:top;text-align:left;"> <div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:left;">Natixis Advisors, LLC (“Natixis 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, 2027 and may be terminated before then only with the consent of the Fund’s Board of Trustees. </div> </td> </tr> </table><div style="margin-top:18pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;">Example </div><div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;">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. The example for Class C shares for the ten‑year period reflects the conversion to Class </div><div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;"> A shares after eight years. The example does not take into account brokerage commissions and other fees to financial intermediaries that you may pay on your purchases and sales of shares of the Fund. Although your actual costs may be higher or lower, based on these assumptions your costs would be: </div> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;width:92%;border-spacing:0px;margin:0 auto"> <tr> <td style="width:74%;"></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:8pt"> <td style="vertical-align:bottom;white-space:nowrap;"> <span style="margin-top:0pt;margin-bottom:0pt;border-bottom:1.00pt solid #000000;display:table-cell;font-size:8pt;font-family:times new roman;font-weight:bold">If shares are redeemed:</span></td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">1 year</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">3 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">5 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">10 years</span></td> <td style="vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class A</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">681</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">925</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,203</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,994</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class C</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">288</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">603</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,059</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">2,129</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class N</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">82</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">271</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">487</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,111</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class Y</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">87</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">293</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">532</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,219</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:8pt;width:92%;border-spacing:0px;margin:0 auto"> <tr> <td style="width:74%;"></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:8pt"> <td style="vertical-align:bottom;white-space:nowrap;"> <span style="margin-top:0pt;margin-bottom:0pt;border-bottom:1.00pt solid #000000;display:table-cell;font-size:8pt;font-family:times new roman;font-weight:bold">If shares are not redeemed:</span></td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">1 year</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">3 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">5 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">10 years</span></td> <td style="vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class C</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">188</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">603</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,059</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">2,129</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> </table> <div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:center;"><span style="font-style:italic">Supplement dated July 1, 2026 to the Prospectus, dated May 1, 2026, </span></div><div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:center;"><span style="font-style:italic">as may be revised or supplemented from time to time, for the following fund: </span></div><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;text-align:center;">NATIXIS OAKMARK FUND </div><div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;text-align:center;">(the “Fund”) </div><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;">Effective immediately, the Fund’s Board of Trustees approved a proposal to reduce the advisory fee rate to 0.59% on all assets. </div><div style="margin-top:18pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;"><span style="font-style:italic">Accordingly, the Annual Fund Operating Expenses table and the Example table within the section “Fund Fees &amp; Expenses” are amended and restated as follows with respect to the Fund: </span></div><div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;">Annual Fund Operating Expenses </div><div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;"><span style="font-style:italic">(expenses that you pay each year as a percentage of the value of your investment) </span></div> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;width:92%;border-spacing:0px;margin:0 auto"> <tr> <td style="width:72%;"></td> <td style="vertical-align:bottom;width:5%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:4%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:4%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:4%;"></td> <td></td> <td></td> <td></td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:8pt"> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class A</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class C</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class N</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class Y</span></td> <td style="vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Management fees<sup style="font-size:75%;vertical-align:top">1</sup></div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.59</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.59</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.59</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.59</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Distribution and/or service (12b‑1) fees</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.25</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Other expenses</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.18</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.18</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.16</td> <td style="white-space:nowrap;vertical-align:bottom;">%<sup style="font-size:75%;vertical-align:top">2</sup> </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.18</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Total annual fund operating expenses</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.02</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.77</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.75</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.77</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Fee waiver and/or expense reimbursement<sup style="font-size:75%;vertical-align:top">3,4</sup></div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.02</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="font-size:1px"> <td style="vertical-align:bottom;"></td> <td style="vertical-align:bottom;">  </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Total annual fund operating expenses after fee waiver and/or expense reimbursement</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.02</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.77</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.73</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.77</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="font-size:1px"> <td style="vertical-align:bottom;"></td> <td style="vertical-align:bottom;">  </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;border-spacing:0px;width:100%"> <tr style="page-break-inside:avoid"> <td style="width:4%;vertical-align:top;text-align:left;"><sup style="font-size:75%;vertical-align:top">1</sup> </td> <td style="vertical-align:top;text-align:left;"> <div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:left;">The Fund’s operating expenses have been restated to reflect a reduction in management fees, effective as of July 1, 2026, as if reduction had been in effect during the fiscal year ended December 31, 2025. The information has been restated to better reflect anticipated expenses of the Fund. </div> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;border-spacing:0px;width:100%"> <tr style="page-break-inside:avoid"> <td style="width:4%;vertical-align:top;text-align:left;"><sup style="font-size:75%;vertical-align:top">2</sup> </td> <td style="vertical-align:top;text-align:left;"> <div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:left;">Pursuant to an expense offset arrangement, credits realized as a result of uninvested cash balances may be used to reduce the Fund’s transfer agent expenses. Other expenses are shown net of such reductions of transfer agent expenses of 2 bps. </div> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;border-spacing:0px;width:100%"> <tr style="page-break-inside:avoid"> <td style="width:4%;vertical-align:top;text-align:left;"><sup style="font-size:75%;vertical-align:top">3</sup> </td> <td style="vertical-align:top;text-align:left;"> <div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:left;">The Natixis Advisors, LLC (“Natixis Advisors”) has given a binding contractual undertaking to the Fund to limit the amount of the Fund’s total annual fund operating expenses to 1.03%, 1.78%, 0.73% and 0.78% of the Fund’s average daily net assets for Class A, C, N, 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, 2027 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 both (1) the class’ applicable expense limitation at the time such amounts were waived/reimbursed and (2) the class’ current applicable expense limitation. 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. </div> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;border-spacing:0px;width:100%"> <tr style="page-break-inside:avoid"> <td style="width:4%;vertical-align:top;text-align:left;"><sup style="font-size:75%;vertical-align:top">4</sup> </td> <td style="vertical-align:top;text-align:left;"> <div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:left;">Natixis 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, 2027 and may be terminated before then only with the consent of the Fund’s Board of Trustees. </div> </td> </tr> </table><div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;">Example </div><div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;">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 for Class N 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 dates noted above and on the Total Annual Fund Operating Expenses for the remaining periods. The example for Class C shares for the ten‑year period reflects the conversion to Class A shares after eight years. The example does not take into account brokerage commissions and other fees to financial intermediaries that you may pay on your purchases and sales of shares of the Fund. Although your actual costs may be higher or lower, based on these assumptions your costs would be: </div> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;width:92%;border-spacing:0px;margin:0 auto"> <tr> <td style="width:74%;"></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:8pt"> <td style="vertical-align:bottom;white-space:nowrap;"> <span style="margin-top:0pt;margin-bottom:0pt;border-bottom:1.00pt solid #000000;display:table-cell;font-size:8pt;font-family:times new roman;font-weight:bold">If shares are redeemed:</span></td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">1 year</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">3 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">5 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">10 years</span></td> <td style="vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class A</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">673</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">881</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,106</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,751</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class C</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">280</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">557</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">959</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,886</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class N</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">77</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">240</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">417</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">930</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class Y</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">79</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">246</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">428</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">954</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:8pt;width:92%;border-spacing:0px;margin:0 auto"> <tr> <td style="width:75%;"></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:8pt"> <td style="vertical-align:bottom;white-space:nowrap;"> <span style="margin-top:0pt;margin-bottom:0pt;border-bottom:1.00pt solid #000000;display:table-cell;font-size:8pt;font-family:times new roman;font-weight:bold">If shares are not redeemed:</span></td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">1 year</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">3 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">5 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">10 years</span></td> <td style="vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class C</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">180</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">557</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">959</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,886</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> </table> 2026-05-01 Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 0.0059 0.0059 0.0059 0.0059 0.0025 0.0100 0.0000 0.0000 0.0018 0.0018 0.0016 0.0018 0.0102 0.0177 0.0075 0.0077 0.0000 0.0000 0.0002 0.0000 0.0102 0.0177 0.0073 0.0077 The Fund’s operating expenses have been restated to reflect a reduction in management fees, effective as of July 1, 2026, as if reduction had been in effect during the fiscal year ended December 31, 2025. The information has been restated to better reflect anticipated expenses of the Fund. April 30, 2027 Example <div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;">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 for Class N 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 dates noted above and on the Total Annual Fund Operating Expenses for the remaining periods. The example for Class C shares for the ten‑year period reflects the conversion to Class A shares after eight years. The example does not take into account brokerage commissions and other fees to financial intermediaries that you may pay on your purchases and sales of shares of the Fund. Although your actual costs may be higher or lower, based on these assumptions your costs would be: </div> If shares are redeemed: 673 881 1106 1751 280 557 959 1886 77 240 417 930 79 246 428 954 If shares are not redeemed: 180 557 959 1886 <div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:center;"><span style="font-style:italic">Supplement dated July 1, 2026 to the Prospectus, dated May 1, 2026, </span></div><div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:center;"><span style="font-style:italic">as may be revised or supplemented from time to time, for the following fund: </span></div><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;text-align:center;">VAUGHAN NELSON MID CAP FUND </div><div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;text-align:center;">(the “Fund”) </div><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;">Effective immediately, Natixis Advisors, LLC has given a binding contractual undertaking to the Fund to limit the amount of the Fund’s total annual fund operating expenses to 1.10%, 1.85%, 0.80% and 0.85% of the Fund’s average daily net assets for Class A, Class C, Class N, and Class 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, 2028. </div><div style="margin-top:18pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;"><span style="font-style:italic">Accordingly, the Annual Fund Operating Expenses table and the Example table within the section “Fund Fees &amp; Expenses” are amended and restated as follows with respect to the Fund: </span></div><div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;">Annual Fund Operating Expenses </div><div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;"><span style="font-style:italic">(expenses that you pay each year as a percentage of the value of your investment) </span></div> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;width:92%;border-spacing:0px;margin:0 auto"> <tr> <td style="width:71%;"></td> <td style="vertical-align:bottom;width:5%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:4%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:4%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:4%;"></td> <td></td> <td></td> <td></td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:8pt"> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class A</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class C</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class N</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">Class Y</span></td> <td style="vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Management fees</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.75</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.75</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.75</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.75</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Distribution and/or service (12b‑1) fees</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.25</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.00</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Other expenses</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.27</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.27</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.17</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.27</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Total annual fund operating expenses</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.27</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">2.02</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.92</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.02</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Fee waiver and/or expense reimbursement<sup style="font-size:75%;vertical-align:top">1,2</sup></div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.17</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.17</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.12</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.17</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="font-size:1px"> <td style="vertical-align:bottom;"></td> <td style="vertical-align:bottom;">  </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Total annual fund operating expenses after fee waiver and/or expense reimbursement</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.10</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1.85</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.80</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> <td style="vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">0.85</td> <td style="white-space:nowrap;vertical-align:bottom;">% </td> </tr> <tr style="font-size:1px"> <td style="vertical-align:bottom;"></td> <td style="vertical-align:bottom;">  </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td style="vertical-align:bottom;"> <div style="margin-top:0pt;margin-bottom:0pt;border-top:1.00px solid #000000;"> </div> </td> <td> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;border-spacing:0px;width:100%"> <tr style="page-break-inside:avoid"> <td style="width:4%;vertical-align:top;text-align:left;"><sup style="font-size:75%;vertical-align:top">1</sup> </td> <td style="vertical-align:top;text-align:left;"> <div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:left;">Natixis Advisors, LLC (“Natixis Advisors” 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 1.10%, 1.85%, 0.80%, and 0.85% of the Fund’s average daily net assets for Class A, Class C, Class N, and Class 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, 2028 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 both (1) the class’ applicable expense limitation at the time such amounts were waived/reimbursed and (2) the class’ current applicable expense limitation. 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.</div> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;border-spacing:0px;width:100%"> <tr style="page-break-inside:avoid"> <td style="width:4%;vertical-align:top;text-align:left;"><sup style="font-size:75%;vertical-align:top">2</sup> </td> <td style="vertical-align:top;text-align:left;"> <div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;text-align:left;">Natixis Advisors, LLC (“Natixis 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, 2027 and may be terminated before then only with the consent of the Fund’s Board of Trustees. </div> </td> </tr> </table><div style="margin-top:18pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;">Example </div><div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;">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. The example for Class C shares for the ten‑year period reflects the conversion to Class </div><div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;"> A shares after eight years. The example does not take into account brokerage commissions and other fees to financial intermediaries that you may pay on your purchases and sales of shares of the Fund. Although your actual costs may be higher or lower, based on these assumptions your costs would be: </div> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;width:92%;border-spacing:0px;margin:0 auto"> <tr> <td style="width:74%;"></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:8pt"> <td style="vertical-align:bottom;white-space:nowrap;"> <span style="margin-top:0pt;margin-bottom:0pt;border-bottom:1.00pt solid #000000;display:table-cell;font-size:8pt;font-family:times new roman;font-weight:bold">If shares are redeemed:</span></td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">1 year</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">3 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">5 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">10 years</span></td> <td style="vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class A</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">681</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">925</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,203</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,994</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class C</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">288</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">603</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,059</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">2,129</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class N</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">82</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">271</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">487</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,111</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class Y</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">87</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">293</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">532</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,219</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> </table> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:8pt;width:92%;border-spacing:0px;margin:0 auto"> <tr> <td style="width:74%;"></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> <td style="vertical-align:bottom;width:3%;"></td> <td></td> <td></td> <td></td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:8pt"> <td style="vertical-align:bottom;white-space:nowrap;"> <span style="margin-top:0pt;margin-bottom:0pt;border-bottom:1.00pt solid #000000;display:table-cell;font-size:8pt;font-family:times new roman;font-weight:bold">If shares are not redeemed:</span></td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">1 year</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">3 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">5 years</span></td> <td style="vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td colspan="2" style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center;"><span style="font-weight:bold">10 years</span></td> <td style="vertical-align:bottom;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt;background-color:#cceeff"> <td style="vertical-align:top;"> <div style="margin-top:0pt;margin-bottom:0pt;margin-left:1.00em;text-indent:-1.00em;font-size:10pt;font-family:times new roman;">Class C</div> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">188</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">603</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">1,059</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> <td style="vertical-align:bottom;">  </td> <td style="white-space:nowrap;vertical-align:bottom;">$</td> <td style="white-space:nowrap;vertical-align:bottom;text-align:right;">2,129</td> <td style="white-space:nowrap;vertical-align:bottom;"> </td> </tr> </table> Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 0.0075 0.0075 0.0075 0.0075 0.0025 0.0100 0.0000 0.0000 0.0027 0.0027 0.0017 0.0027 0.0127 0.0202 0.0092 0.0102 0.0017 0.0017 0.0012 0.0017 0.0110 0.0185 0.0080 0.0085 April 30, 2028 Example <div style="margin-top:6pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;">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. The example for Class C shares for the ten‑year period reflects the conversion to Class </div><div style="margin-top:0pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;"> A shares after eight years. The example does not take into account brokerage commissions and other fees to financial intermediaries that you may pay on your purchases and sales of shares of the Fund. Although your actual costs may be higher or lower, based on these assumptions your costs would be: </div> If shares are redeemed: 681 925 1203 1994 288 603 1059 2129 82 271 487 1111 87 293 532 1219 If shares are not redeemed: 188 603 1059 2129 The Fund’s operating expenses have been restated to reflect a reduction in management fees, effective as of July 1, 2026, as if reduction had been in effect during the fiscal year ended December 31, 2025. The information has been restated to better reflect anticipated expenses of the Fund. Pursuant to an expense offset arrangement, credits realized as a result of uninvested cash balances may be used to reduce the Fund’s transfer agent expenses. Other expenses are shown net of such reductions of transfer agent expenses of 2 bps. The Natixis Advisors, LLC (“Natixis Advisors”) has given a binding contractual undertaking to the Fund to limit the amount of the Fund’s total annual fund operating expenses to 1.03%, 1.78%, 0.73% and 0.78% of the Fund’s average daily net assets for Class A, C, N, 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, 2027 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 both (1) the class’ applicable expense limitation at the time such amounts were waived/reimbursed and (2) the class’ current applicable expense limitation. 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. Natixis 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, 2027 and may be terminated before then only with the consent of the Fund’s Board of Trustees. Natixis Advisors, LLC (“Natixis Advisors” 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 1.10%, 1.85%, 0.80%, and 0.85% of the Fund’s average daily net assets for Class A, Class C, Class N, and Class 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, 2028 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 both (1) the class’ applicable expense limitation at the time such amounts were waived/reimbursed and (2) the class’ current applicable expense limitation. 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. Natixis Advisors, LLC (“Natixis 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, 2027 and may be terminated before then only with the consent of the Fund’s Board of Trustees.