Company: SNY
Filing Date: 2025-10-29
Form Type: 424B5
Source: 0001193125-25-255563
Chunk: 91

Company: Sanofi
Filing Date: 2025-10-29
Form: 424B5
Chunk 91
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 the provisions dealing with modification and waiver of the applicable indenture. 
 (Section 902)                                                                                               |

Changes Requiring a Majority Vote.The second type of change to the indenture and your debt securities is the kind that requires a vote in favor by holders of outstanding debt securities owning either (i) a majority of the principal amount of the outstanding debt securities of a series affected issued under the indenture or (ii) a majority of the principal amount of the aggregate of the outstanding debt securities of all series identified by us as affected, whether issued under the indenture or any other indenture of ours providing for such aggregated voting, in which case such holders will be treated as a single class for such purpose. The same majority vote would be required for us to obtain a waiver of all or part of the covenants described below, or a waiver of a past default. However, we cannot obtain a waiver of a payment default or any other aspect of the indenture or the debt securities described above under “— Changes Requiring Your Approval” unless we obtain, with respect to each series affected, each holder’s individual consent, for example, by calling a meeting of holders and seeking a 100% quorum and unanimous consent, or, more likely, by obtaining written consents from each holder, to the waiver. ( Section 513) Changes Not Requiring Approval. The third type of change does not require any vote by holders of debt securities. This type is generally limited to clarifications and other changes that would not adversely affect holders of the debt securities in any material respect. ( Section 901) Further Details Concerning Voting.When taking a vote, we will use the following rules to decide how much principal amount to attribute to a debt security:

| • |     | Debt securities will not be considered outstanding, and therefore not eligible to vote, if we have deposited or                                                                                                                                        
 set aside in trust for you money for their payment or redemption. Debt securities will also not be eligible to vote if they have been fully defeased pursuant to any applicable defeasance provisions described in the prospectus supplement. (Section 
 101)                                                                                                                                                                                                                                                   |

| • |     | We will generally be entitled to set any day as a record date for the purpose of determining the holders of                                                                                                                                              
 outstanding debt securities that are entitled to vote with respect to changes to the indenture and/or debt securities or the waiver of certain covenants. If we set a record date for this purpose, that vote or waiver may be taken only by persons who