Company: SNY
Filing Date: 2025-10-29
Form Type: 424B5
Source: 0001193125-25-255563
Chunk: 14

Company: Sanofi
Filing Date: 2025-10-29
Form: 424B5
Chunk 14
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 to the greater of:                                                                                                                                                                                         |

(1) (a) the sum of the present values of the Remaining Scheduled Payments of principal and interest thereon

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discounted to the redemption date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate plus 0.050% (or 5 basis points) less (b) unpaid interest, if any, accrued thereon to the date of redemption, and (2) 100% of the principal amount of the notes to be redeemed,

| plus, in either case, accrued and unpaid interest thereon to the redemption date (but not including the redemption date). |

| See “Description of the Notes—Redemption—Optional Redemption.” |

PROVISIONS APPLICABLE TO THE FLOATING RATE NOTES

| Margin | 2027 floating rate notes: 0.460% |

| 2028 floating rate notes: 0.540% |

| Regular Record Dates | Close of business on January 19, April 18, July 19 and October 19, as applicable. |

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| 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 Reset Date | Each floating rate 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