Company: SNY
Filing Date: 2025-10-27
Form Type: 424B5
Source: 0001193125-25-250786
Chunk: 93

Company: Sanofi
Filing Date: 2025-10-27
Form: 424B5
Chunk 93
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 calendar days from such due date, unless in any such event the amount due is not paid due to circumstances affecting the making or clearing of the payment which are outside the control of the Issuer, in which case 
 such event shall not constitute an event of default so long as such circumstances continue in existence;                                                                                                                                                 |

| • |     | any amount of interest on, or any premium on, a debt security of that series is not paid on the due date thereof 
 and such default is not remedied within a period of 30 calendar days from such due date, unless                  |

18

| in any such event the amount due is not paid due to circumstances affecting the making or clearing of the payment which are outside the control of the Issuer, in which case such event shall not 
 constitute an event of default so long as such circumstances continue in existence;                                                                                                               |

| • |     | any other obligation of the Issuer under the applicable indenture is not complied with or performed within a                                                                                                                                            
 period of 60 calendar days from and excluding the date of receipt by us of a written notice (delivered by registered or certified mail) to us that we are in breach. The notice must be sent by either the trustee or by the holders of at least 25% in 
 principal amount of the outstanding securities of that series;                                                                                                                                                                                          |

| • |     | (A) any borrowed money of the Issuer or of any Principal Subsidiary becomes due and repayable prematurely by                                                                                                                                          
 reason of a default in relation thereto and is not repaid prior to expiry of any applicable grace period or (B) any such borrowed money is not paid at maturity as extended by any applicable grace period or (C) any guarantee or indemnity in       
 respect of any borrowed money of a third party given by the Issuer or any Principal Subsidiary is not honored when due, following a demand for payment made under such guarantee or indemnity where such demand is necessary, taking into account any 
 applicable grace period, unless in the case of (C) hereof it has been disputed in good faith that such guaranteed or indemnified third party borrowed money is due or payable or that such guarantee or indemnity is callable or that such demand     
 for payment is valid and such dispute has been submitted to a competent court, in which case such event shall not constitute an event of default hereunder, so long as the dispute shall not have been finally adjudicated and provided that in       
 the case of (A), (B