Company: SNY
Filing Date: 2025-10-27
Form Type: 424B5
Source: 0001193125-25-250786
Chunk: 71

Company: Sanofi
Filing Date: 2025-10-27
Form: 424B5
Chunk 71
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 “Company,” the “Group,” “we,” “our,” or “us,” unless the context otherwise requires, refer to Sanofi S.A. (as defined hereinafter) and its consolidated subsidiaries, and “Sanofi S.A.” refers to the parent company, a French société anonyme(limited liability company), without its subsidiaries. CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS This prospectus, including the documents incorporated herein by reference, contains forward-looking statements (within the meaning of Section 27A of the U.S. Securities Act of 1933 (the “Securities Act”) or Section 21E of the U.S. Securities Exchange Act of 1934 (the “Exchange Act”)) about us, including without limitation, certain statements made in “Item 5. Operating and Financial Review and Prospects,” as well as in “Item 4. Information on the Company — B/ Business overview” of our 2023 Form 20-F. Examples of such forward-looking statements include:

| • |     | projections of operating revenues, net income, business net income, earnings per share, business earnings per                                                    
 share, capital expenditures, cost savings, restructuring costs, positive or negative synergies, dividends, capital structure or other financial items or ratios; |

| • |     | statements of our profit forecasts, trends, plans, objectives or goals, including those relating to products, 
 clinical trials, regulatory approvals and competition; and                                                    |

| • |     | statements about our future events and economic performance or that of France, the United States or any other 
 countries in which we operate.                                                                                |

This information is based on data, assumptions and estimates considered as reasonable by Sanofi as at the date of this prospectus and undue reliance should not be placed on such statements. 1

Words such as “believe,” “anticipate,” “plan,”
“expect,” “intend,” “target,” “estimate,” “project,” “predict,” “forecast,” “guideline,” “should” and similar expressions are intended to
identify forward-looking statements but are not the exclusive means of identifying such statements.

Forward-looking statements involve
inherent, known and unknown, risks and uncertainties associated with the domestic or cross-border regulatory, economic, financial and competitive environment, including among other things, volatile economic and market conditions, the impact of
global disruptions, including pandemics, and other factors that could cause future results and objectives to differ materially from those expressed or implied in