Company: SNY
Filing Date: 2025-10-29
Form Type: 424B5
Source: 0001193125-25-255563
Chunk: 93

Company: Sanofi
Filing Date: 2025-10-29
Form: 424B5
Chunk 93
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 property 
 or similar tax or other governmental charge.                                                                    |

| • |     | The tax or governmental charge is for a tax or governmental charge that is payable in a manner that does not 
 involve withholding or deduction.                                                                            |

| • |     | The tax or governmental charge is imposed or withheld because the holder or beneficial owner failed: |

| • |     | to provide information about the nationality, residence or identity of the holder or beneficial owner; or |

| • |     | to make a declaration or satisfy any information requirements that the statutes, treaties, regulations or                                      
 administrative practices of the Republic of France require as a precondition to exemption from all or part of such tax or governmental charge. |

| • |     | The withholding or deduction is imposed on a holder or beneficial owner who could have avoided such withholding                                                                                           
 or deduction by presenting its debt securities to another paying agent or by receiving payments under such debt securities in a bank account opened in a financial institution that is not located in any 
 non-cooperative State or territory as set forth in the list, as amended from time to time, referred to in Article 238-0 A of the French General Tax Code (Code General                                    
 des impôts).                                                                                                                                                                                              |

| • |     | The holder is a fiduciary or partnership or an entity that is not the sole beneficial owner of the payment of the                                                                                                                                        
 principal of, or any interest on, any debt security, and the laws of the Republic of France require the payment to be included in the income of a beneficiary or settlor for tax purposes with respect to such fiduciary or a member of such partnership 
 or a beneficial owner who would not have been entitled to such additional amounts had it been the holder of such security (Section 1007).                                                                                                                |

These provisions will also apply to any taxes or governmental charges imposed by any jurisdiction in which a successor to Sanofi S.A. (the “Issuer”) by merger is organized or if we otherwise change the jurisdiction in which the Issuer is organized or resident for tax purposes, except that the name of the jurisdiction of the successor, or our new jurisdiction of organization or residency for tax purposes, will be substituted for the Republic of France. Optional Tax Redemption Unless otherwise specified in the prospectus supplement for a particular series, we have the option to redeem the debt securities of any series prior to maturity if, upon the occurrence of any change in, or any change in the official application or interpretation of, French law (or the law of the jurisdiction of our