INFORMATION NOTICE ON A TRANSACTION OF GREATER IMPORTANCE

We send you Information Notice drawn up in accordance with Article 5 and in compliance with the Scheme in Annex 4 of the Regulations approved by the Consob with resolution no. 17221 of 12 March 2010, as subsequently amended and supplemented, and in accordance with Article 4 of the “Guideline on transactions with interests of the Directors and Statutory Auditors and related-party transactions” adopted by Snam S.p.A.