Company: SNY
Filing Date: 2025-10-29
Form Type: 424B5
Source: 0001193125-25-255563
Chunk: 46

Company: Sanofi
Filing Date: 2025-10-29
Form: 424B5
Chunk 46
---
.15”)
under the caption “U.S. government securities–Treasury constant maturities–Nominal” (or any successor caption or heading). In determining the Treasury Rate, the Issuer shall select, as applicable: (1) the yield for the
Treasury constant maturity on H.15 exactly equal to the period from the redemption date to the Par Call Date or, in the case of the 2027 Fixed Rate Notes, the maturity date (the “Remaining Life”); or (2) if there is no such Treasury
constant maturity on H.15 exactly equal to the Remaining Life, the two yields – one yield corresponding to the Treasury constant maturity on H.15 immediately shorter than and one yield corresponding to the Treasury constant maturity on H.15
immediately longer than the Remaining Life – and shall interpolate to the Par Call Date or, in the case of the 2027 Fixed Rate Notes, the maturity date on a straight-line basis (using the actual number of days) using such yields and rounding
the result to three decimal places; or (3) if there is no such Treasury constant maturity on H.15 shorter than or longer than the Remaining Life, the yield for the single Treasury constant maturity on H.15 closest to the Remaining Life. For
purposes of this paragraph, the applicable Treasury constant maturity or maturities on H.15 shall be deemed to have a maturity date equal to the relevant number of months or years, as applicable, of such Treasury constant maturity from the
redemption date.

If on the third business day preceding the redemption date H.15 is no longer published, the Issuer shall calculate the
Treasury Rate based on the rate per annum equal to the semi-annual equivalent yield to maturity at 11:00 a.m., New York City time, on the second business day preceding such redemption date of the United States Treasury security maturing on, or with
a maturity that is closest to, the Par Call Date or, in the case of the 2027 Fixed Rate Notes, the maturity date, as applicable. If there is no United States Treasury security maturing on the Par Call Date or, in the case of the 2027 Fixed Rate
Notes, the maturity date, but there are two or more United States Treasury securities with a maturity date equally distant from the Par Call Date or, in the case of the 2027 Fixed Rate Notes, the maturity date, one with a maturity date preceding
such date and

S-32