Company: SNY
Filing Date: 2025-10-29
Form Type: 424B5
Source: 0001193125-25-255563
Chunk: 43

Company: Sanofi
Filing Date: 2025-10-29
Form: 424B5
Chunk 43
---
 of taxes or any other governmental charges, subject to the exceptions described below, we will, to the fullest extent then permitted by law, be required to pay you additional amounts so that the net amount you receive will be the amount specified in the Note to which you would otherwise have been entitled. We will not have to pay additional amounts under any of the following circumstances:

| • |     | The holder or beneficial owner of the Notes (or a third party holding on behalf of the holder or such beneficial                                                                                                                
 owner) is subject to such tax or governmental charge by reason of having some connection to the Relevant Jurisdiction requiring such withholding or deduction, other than the mere holding or beneficial ownership of the Note. |

| • |     | Taxes that are imposed or levied by reason of the failure of such holder or beneficial owner to present (where                                                                                                                                          
 presentation is required) its Note within 30 calendar days after we have made available to such holder or beneficial owner a payment under the Notes and the Indenture (excluding any additional amounts to which such holder or beneficial owner would 
 have been entitled had its Notes been presented on any day within such 30 calendar day period).                                                                                                                                                         |

| • |     | The tax or governmental charge is on account of an estate, inheritance, gift, sale, transfer, personal 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.                                                                            |

S-30

| • |     | The tax or governmental charge is imposed or withheld because the holder or beneficial owner failed to comply 
 with our reasonable request:                                                                                  |

| • |     | 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 Relevant Jurisdiction 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 Notes to another paying agent or by receiving payments under such Notes 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