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Costanza Posarelli


Costanza Posarelli

London +44-20-7959-8900+44-20-7959-8900 +44-20-7959-8950+44-20-7959-8950
[email protected]
Costanza Posarelli is an associate in Sullivan & Cromwell’s General Practice group. Costanza has experience in a broad range of practice areas including mergers and acquisitions, capital markets and corporate governance. Costanza has advised clients across a range of industries, including consumer & retail, automotive, luxury, insurance and energy. She is New York-qualified and joined the firm in September 2016.


  • Ermenegildo Zegna Group in its combination with Investindustrial Acquisition Corp., a SPAC sponsored by investment subsidiaries of Investindustrial VII L.P., pursuant to which Zegna became a public company with an initial enterprise value of $3.2 billion.
  • EXOR and PartnerRe in connection with Covéa’s $9 billion proposed purchase of PartnerRe from EXOR.
  • Fiat Chrysler Automobiles N.V. in its combination with Peugeot S.A. to create Stellantis
  • Rhône Group in the sale of its equity interest in Garda World Security Corporation (GardaWorld) to funds advised by BC Partners and others, in a C$5.2 billion recapitalization
  • Carel Industries S.p.A. in its €270 million IPO