Company: SNY
Filing Date: 2025-10-29
Form Type: 424B5
Source: 0001193125-25-255563
Chunk: 1

Company: Sanofi
Filing Date: 2025-10-29
Form: 424B5
Chunk 1
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3, 2025. The 2027 floating rate notes, the 2028 floating rate notes, the 2027 fixed rate notes, the 2028 fixed rate notes and the 2032 fixed rate notes
will mature at par on November 3, 2027, 2028, 2027, 2028 and 2032, respectively.

At our option, we may redeem the 2027 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 2028 fixed rate notes (i) at any time prior to October 3, 2028 (one
month prior to the maturity date of the 2028 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
October 3, 2028 (one month prior to the maturity date of the 2028 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 2032 fixed
rate notes (i) at any time prior to September 3, 2032 (two months prior to the maturity date of the 2032 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 September 3, 2032 (two months prior to the maturity date of the 2032 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