Company: SNY
Filing Date: 2025-10-27
Form Type: 424B5
Source: 0001193125-25-250786
Chunk: 14

Company: Sanofi
Filing Date: 2025-10-27
Form: 424B5
Chunk 14
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 Reset Date | Each floating rate interest payment date. |

| Interest Period | The period beginning on, and including, a floating interest payment date and ending on, but not including, the following floating interest payment date; provided that the first interest period will begin on   , 2025, and will 
 end on, but not include, the first floating interest payment date.                                                                                                                                                                |

| Day Count Convention | Interest on the floating rate notes will be calculated on the basis of the actual number of days in each interest period, assuming a 360-day year. Modified following adjusted. |

| If any payment is due on the floating rate notes on a day that is not a business day (as defined in “Description of the Notes” in this prospectus supplement), the floating interest payment date will be                                          
 postponed to the next day that is a business day and interest thereon will continue to accrue to but excluding such succeeding business day, except that if that business day is in the next succeeding calendar month, the floating rate interest 
 payment date will be the immediately preceding business day and interest shall accrue to but excluding such preceding business day. Postponements of this kind, as applicable, will not result in a default.                                       |

| If the maturity date of the floating rate notes or date of redemption or repayment falls on a day that is not a business day, the payment of interest and principal will be made on the next succeeding business day, and 
 no interest on such payment will accrue during the period from and after such original maturity date or date of redemption or repayment.                                                                                  |

| U.S. Government Securities Business Day | Any day except for a Saturday, Sunday or a day on which the Securities Industry and Financial Markets Association recommends that the fixed income departments of its members be closed for the entire day for purposes of trading in U.S. government 
 securities.                                                                                                                                                                                                                                           |

S-11

PROVISIONS APPLICABLE TO ALL OF THE NOTES (FIXED AND FLOATING)

| Ranking | The notes will be unsecured and unsubordinated and therefore will rank equally with all of our other existing and future unsecured and unsubordinated indebtedness. |

| Payment of Additional Amounts | If French law requires that payments of principal and interest in respect of the notes be subject to deduction or withholding in respect of any present or future taxes or duties levied by the Republic of France, we may be required to pay holders 
 additional amounts so that the amount holders receive will be the amount they would have