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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of October 2026

Commission File Number: 001-31368

SANOFI

(Translation of registrant’s name into English)

46, avenue de la Grande Armée, 75017 Paris, FRANCE

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

In October 2026, Sanofi issued the press release attached hereto as Exhibit 99.1 which is incorporated herein by reference.

Exhibit Index


Exhibit No.	Description

Exhibit 99.1	Press release dated October 30, 2026: Q3 2026: double-digit growth in sales and business EPS / FY 2026: guidance upgraded

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Dated: October 30, 2026

SANOFI

By:

/s/ Alexandra Roger

Name:

Alexandra Roger

Title:

Head of Legal Corporate & Finance

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