Company: SNY
Filing Date: 2025-10-29
Form Type: 424B5
Source: 0001193125-25-255563
Chunk: 110

Company: Sanofi
Filing Date: 2025-10-29
Form: 424B5
Chunk 110
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 securities will be deemed not to have such a purpose and effect, and accordingly will be able to benefit from the Exemption if such debt securities are:

| (i) | offered by means of a public offering within the meaning of Article L.                                                                                              
 411-1 of the French Monetary and Financial Code, or pursuant to an equivalent offer in a State other than a Non-Cooperative State. For this purpose, an “equivalent 
 offer” means any offer requiring the registration or submission of an offer document by or with a foreign securities market authority; or                           |

| (ii) | admitted to trading on a regulated market or on a French or foreign multilateral securities trading system                                                                                                       
 provided that such market or system is not located in a Non-Cooperative State, and the operation of such market is carried out by a market operator or an investment services provider, or by such other similar 
 foreign entity, provided further that such market operator, investment services provider or entity is not located in a Non-Cooperative State; or                                                                 |

| (iii) | admitted, at the time of their issue, to the operations of a central depository, or to those of a settlement                                                                                                   
 and delivery systems operator for financial instruments within the meaning of Article L. 561-2 of the French Monetary and Financial Code, or of one or more similar foreign depositories or systems operators, 
 provided that such depository or systems operator is not located in a Non-Cooperative State.                                                                                                                   |

Additional amounts.If the French tax laws or regulations applicable to us (or to any of our successors) change and payments in respect of the debt securities become subject to withholding or deduction, we may be required to pay you additional amounts to offset such withholding except as provided above in “Description of the Debt Securities — Special Situations — Payment of Additional Amounts”, including under “ — Optional Tax Redemption”, or in any applicable prospectus supplement. Capital Gains Non-Frenchtax resident holders of debt securities who do not hold the debt securities in connection with a business or profession conducted in France generally will not be subject to any French income tax or capital 29

gains tax on the sale or disposal of debt securities. Transfers of debt securities made outside France will not be subject to any stamp duty or other transfer taxes imposed in France.

Estate and Gift Tax

France imposes estate and gift tax on securities of a French company that are acquired by inheritance or gift. The tax applies without regard
to the residence of the transferor. However,