Disclosure received by the Company on 25th September 2026 under Regulation 7(2)(a) of the SEBI (Prohibition of Insider Trading) Regulations, 2015 from Hoechst GmbH, a promoter of the Company

28th September 2026 The Secretary The Secretary BSE Limited The National Stock Exchange of India Limited Phiroze Jeejeebhoy Towers Exchange Plaza, C-1, Block G, Dalal Street Bandra-Kurla Complex, Mumbai 400 001 Bandra (E), Mumbai 400 051 Scrip Code: 500674 Symbol: SANOFI Sub: Disclosure under Regulation 7(2)(b) of the SEBI (Prohibition of Insider Trading) Regulations, 2015 including any statutory modifications or amendments or re-enactments thereof (“SEBI PIT Regulations”) Dear Sir/Madam, With reference to the above captioned subject, we are enclosing herewith the disclosure received by the Company on 25th September 2026 under Regulation 7(2)(a) of the SEBI PIT Regulations from Hoechst GmbH, a Promoter of the Company, in Form B with respect to the disposal of equity shares of the Company by way of transfer to Sanofi Healthcare India Private Limited, an entity of the Promoter Group, by way of inter-se transfer of shares through a block deal mechanism on the Stock Exchange. We are hereby submitting the requisite disclosure under Regulation 7(2)(b) of the SEBI PIT Regulations for your information. This is for your information and records. Thanking you, Yours faithfully For Sanofi India Limited Haresh Vala Company Secretary and Compliance Officer Membership No.: A18246 Encl: As above Sanofi India Limited, Sanofi House, CTS No. 117-B, L&T Business Park, Saki Vihar Road, Powai, Mumbai 400 072 – India Tel.: +91(22) 2803 2000 - Fax: +91(22) 2803 2939 Corporate Identity Number: L24239MH1956PLC009794 Website: www.sanofiindialtd.com | www.sanofi.in Email: igrc.sil@sanofi.com