0000052136 2023-04-01 2023-04-01 0000052136 nftii:S000034097Member 2023-04-01 2023-04-01 pure iso4217:USD false 2023-04-06 497 0000052136 Natixis Funds Trust II N-1A 2022-11-30 <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 April 6, 2023 to the Summary Prospectus, Prospectus and Statement of Additional Information, each dated April 1, 2023, as may be revised or supplemented from time to time, for the following Fund: </span></div> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;width:56%;border:0px;margin:0 auto"> <tr> <td style="width:100%;"/> </tr> <tr style="font-size:1pt"> <td style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000; BORDER-RIGHT:0.75pt solid #000000; padding-left:8pt;height:3.75pt;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="text-align: center;padding-bottom:4pt ;BORDER-LEFT:0.75pt solid #000000; BORDER-RIGHT:0.75pt solid #000000; BORDER-BOTTOM:0.75pt solid #000000; padding-left:8pt; padding-right:2pt;vertical-align:top;"><span style="font-weight:bold">Loomis Sayles Senior Floating Rate and Fixed Income Fund</span></td> </tr> </table><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;"><span style="font-style:italic">Effective immediately, the fifth paragraph under the sub‑section “Principal Investment Strategies” in the section “Investments, Risks and Performance” within the “Fund Summary” and under the sub‑section “Principal Investment Strategies” in the section “More About Goals and Strategies” within the prospectus is hereby amended and restated to include the following: </span></div><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;">The Fund may use derivative instruments, including, but not limited to, futures contracts, forward contracts, swaps (including, among others, credit default swap indices, loan-only credit default swaps and loan-only credit default swap indices) and structures notes to enhance income, to hedge against fluctuations in interest rates or currency exchange rates, and/or as a substitute for the purchase or sale of securities. </div><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;"><span style="font-style:italic">Effective immediately, the “Borrowing and Leverage Risk” disclosure under the sub‑section “Principal Investment Risks” in the section “Investments, Risks and Performance” within the “Fund Summary” section within the Fund’s prospectus is hereby replaced with the following: </span></div><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;"><span style="font-weight:bold">Leverage Risk</span>: Leverage is the risk associated with securities or investment practices (e.g., borrowing and the use of certain derivatives) that multiply small index, market or asset-price movements into larger changes in value. The use of leverage increases the impact of gains and losses on the Fund’s returns, and may lead to significant losses if investments are not successful. </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">Supplement dated April 6, 2023 to the Summary Prospectus, Prospectus and Statement of Additional Information, each dated April 1, 2023, as may be revised or supplemented from time to time, for the following Fund: </span></div> <table cellpadding="0" cellspacing="0" style="border-collapse:collapse;font-family:times new roman;font-size:10pt;width:56%;border:0px;margin:0 auto"> <tr> <td style="width:100%;"/> </tr> <tr style="font-size:1pt"> <td style="BORDER-LEFT:0.75pt solid #000000; BORDER-TOP:0.75pt solid #000000; BORDER-RIGHT:0.75pt solid #000000; padding-left:8pt;height:3.75pt;"> </td> </tr> <tr style="page-break-inside:avoid;font-family:times new roman;font-size:10pt"> <td style="text-align: center;padding-bottom:4pt ;BORDER-LEFT:0.75pt solid #000000; BORDER-RIGHT:0.75pt solid #000000; BORDER-BOTTOM:0.75pt solid #000000; padding-left:8pt; padding-right:2pt;vertical-align:top;"><span style="font-weight:bold">Loomis Sayles Senior Floating Rate and Fixed Income Fund</span></td> </tr> </table><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;"><span style="font-style:italic">Effective immediately, the fifth paragraph under the sub‑section “Principal Investment Strategies” in the section “Investments, Risks and Performance” within the “Fund Summary” and under the sub‑section “Principal Investment Strategies” in the section “More About Goals and Strategies” within the prospectus is hereby amended and restated to include the following: </span></div><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;">The Fund may use derivative instruments, including, but not limited to, futures contracts, forward contracts, swaps (including, among others, credit default swap indices, loan-only credit default swaps and loan-only credit default swap indices) and structures notes to enhance income, to hedge against fluctuations in interest rates or currency exchange rates, and/or as a substitute for the purchase or sale of securities. </div><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;font-weight:bold;"><span style="font-style:italic">Effective immediately, the “Borrowing and Leverage Risk” disclosure under the sub‑section “Principal Investment Risks” in the section “Investments, Risks and Performance” within the “Fund Summary” section within the Fund’s prospectus is hereby replaced with the following: </span></div><div style="margin-top:12pt;margin-bottom:0pt;font-size:10pt;font-family:times new roman;"><span style="font-weight:bold">Leverage Risk</span>: Leverage is the risk associated with securities or investment practices (e.g., borrowing and the use of certain derivatives) that multiply small index, market or asset-price movements into larger changes in value. The use of leverage increases the impact of gains and losses on the Fund’s returns, and may lead to significant losses if investments are not successful. </div> 2023-04-06 2023-04-01