Company: SNY
Filing Date: 2025-10-29
Form Type: 424B5
Source: 0001193125-25-255563
Chunk: 58

Company: Sanofi
Filing Date: 2025-10-29
Form: 424B5
Chunk 58
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 state thereof, or the District of Columbia, an estate whose income is subject to U.S. federal income tax regardless of its source, a trust if a U.S. court can exercise primary supervision over the
trust’s administration and one or more United States persons are authorized to control all substantial decisions of the trust, or any other person that is subject to U.S. federal income tax on a net income basis in respect of an investment in
the notes. This summary deals only with U.S. holders that hold notes as capital assets (generally, properly held for investment). It does not address considerations that may be relevant to you if you are an investor that is subject to special tax
rules, such as a bank, thrift, real estate investment trust, regulated investment company, insurance company, dealer in securities or currencies, a holder that uses
mark-to-market treatment, a person that will hold notes as a hedge against currency risk or as a position in a “straddle” or conversion of other integrated
transaction, a tax-exempt organization, partnership or other entity or arrangement classified as a partnership for U.S. federal income tax purposes (or investors thereof), a person liable for the alternative
minimum tax, a person subject to special rules for accrual basis taxpayers under Section 451(b) of the U.S. Internal Revenue Code of 1986, as amended (the “Code”) or a person whose “functional currency” is not the U.S.
dollar.

This discussion is based on the Code, its legislative history, existing and proposed U.S. Treasury Regulations, U.S. Internal
Revenue Service (the “IRS”) administrative pronouncements and judicial decisions, all as available and in effect on the date hereof and all of which may change. Any change could apply retroactively and could affect the continued validity
of this summary. This summary assumes that the securities will be characterized as debt rather than equity for U.S. federal income tax purposes and that U.S. holders will treat the securities as such. In addition, this summary does not address all
aspects of U.S. federal income taxes nor does it address all tax considerations that may be relevant to a U.S. holder in light of such holder’s personal circumstances (including estate and gift tax considerations or state, local or other non-U.S. tax considerations).

If a partnership or other entity or arrangement classified as a
partnership for U.S. federal income tax purposes holds notes, the U.S. federal income tax treatment of a partner will generally depend