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Guillaume Isautier


Guillaume Isautier, the head of Shearman & Sterling’s Paris Mergers & Acquisitions Group, advises domestic and international clients in a wide variety of M&A transactions, including purchases and sales of listed and non-listed companies, strategic mergers and joint ventures, as well as business carve-out acquisitions and divestitures. His practice focuses on a broad range of industry sectors including banking, telecom, energy and consumer goods & retail sectors. He also regularly represents private equity funds.

Guillaume Isautier is recognized as a leading lawyer in Chambers Global 2016, with commentary including "An absolutely fantastic lawyer, rigorous, professional and available".

Selected Experience

  • M&A Deal of the Year - American Lawyer 2015 – Algerian Fonds National d’Investissement (FNI) in its acquisition of a 51% stake in Orascom Telecom Algérie (Djezzy)
  • Amundi Group in its acquisition of Smith Breeden Associates, Inc.
  • Florac in the sale, alongside L Capital, Indigo Capital and the managers of Groupe SMCP, of Groupe SMCP (Sandro, Maje and Claudie Pierlot) to the US private equity firm KKR
  • Nokia in its acquisition of Withings
  • Société Générale in its sale of ECS to Econocom
  • Société Générale in the acquisition of BHF Kleinwort Benson's private banking activities in the UK and in the Channel Islands following the hostile cash tender offer launched by Oddo on BHF Kleinwort Benson


  • University of Paris X - Nanterre, D.E.S.S. Droit du Commerce International, 1998
  • Golden Gate University, LL.M. in Taxation, 1997


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