Company: SNY
Filing Date: 2025-10-27
Form Type: 424B5
Source: 0001193125-25-250786
Chunk: 1

Company: Sanofi
Filing Date: 2025-10-27
Form: 424B5
Chunk 1
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20 fixed rate notes will mature at par on ,
20 , 20 , 20 , 20 and 20 , respectively.

At our
option, we may redeem the 20 fixed rate notes in whole at any time or in part from time to time, at a redemption price equal to their principal amount plus a “make-whole” premium. At our option, we may redeem the
20 fixed rate notes (i) at any time prior to , 20 ( months prior to the maturity date of the 20 fixed rate notes), in whole at any time or in
part from time to time, at a redemption price equal to their principal amount plus a “make-whole” premium and (ii) at any time on or after , 20 ( months prior to the
maturity date of the 20 fixed rate notes), in whole at any time or in part from time to time, at a redemption price equal to 100% of their principal amount. At our option, we may redeem the 20 fixed rate notes
(i) at any time prior to , 20 ( months prior to the maturity date of the 20 fixed rate notes), in whole at any time or in part from time to time, at a redemption
price equal to their principal amount plus a “make-whole” premium and (ii) at any time on or after , 20 ( months prior to the maturity date of the
20 fixed rate notes), in whole at any time or in part from time to time, at a redemption price equal to 100% of their principal amount. We may also redeem all of the notes at any time at a price equal to 100% of their principal
amount in the event of certain tax law changes requiring the payment of additional amounts as described herein. In each case, we will pay accrued and unpaid interest, if any, and any other amounts payable to, but excluding, the date of redemption.
The floating rate notes are not redeemable prior to maturity other than as set forth herein.

The notes will not be subject to any sinking fund
requirements. The notes will be issued in minimum denominations of $2,000 and integral multiples of $1,000. See “Description of the Notes.”

The notes will be our unsecured and unsubordinated obligations, and therefore will rank equally with each other and with all of our existing and future unsecured and unsubordinated debt obligations. We do not intend to list the notes on any securities exchange or automated quotation system. Investing in the