Company: SNY
Filing Date: 2025-10-27
Form Type: 424B5
Source: 0001193125-25-250786
Chunk: 13

Company: Sanofi
Filing Date: 2025-10-27
Form: 424B5
Chunk 13
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| Interest Rate | The interest rate for the floating rate notes for the first interest period (as defined below) will be equal to Compounded SOFR (as defined below) as determined on the second U.S. Government Securities Business Day prior to   ,                      
 2026 plus the applicable margin (as indicated below). Thereafter, the interest rate for any interest period (as defined below) will be equal to Compounded SOFR as determined on the applicable interest determination date plus the margin. In no event 
 will the interest on the floating rate notes be less than zero.                                                                                                                                                                                          |

| The floating rate notes will bear interest at an interest rate for each interest period equal to Compounded SOFR (as defined below), reset quarterly, plus a margin, subject to the provisions set forth in the 
 “Description of the Notes—Principle, Interest and Maturity—Floating Rate Notes.” The margin applicable to the 20   floating rate notes and the 20   floating rate notes will                                    
 be   % and   %, respectively. We will pay interest on the floating rate notes on   ,    ,    and   of each year, beginning                                                                                      
 on   , 2026.                                                                                                                                                                                                    |

| Margin | 20   floating rate notes:   % |

| 20   floating rate notes:   % |

S-10

| Floating Rate Interest Payment Dates | Interest on the floating rate notes will be paid quarterly in arrears on   ,   ,   and   of each year, beginning on      , 2026, subject to 
 adjustment in accordance with the day count convention specified below.                                                                     |

| Regular Record Dates | Close of business on   ,   ,   and   , as applicable. |

| Interest Determination Date | The second U.S. Government Securities Business Day (as defined in “Description of the Notes” in this prospectus supplement) preceding the Interest Reset Date (as defined below). |

| Interest