Stefano Nanni Costa


  • Corporate law, with a particular focus on:
    • mergers and acquisitions
    • joint ventures
    • private equity
    • corporate reorganizations
    • cross-border deals
    • general corporate matters
  • Litigation with a particular focus on:
    • corporate
    • commercial
    • insolvency
    • IP
    • antitrust matters
  • Key sectors:
    • Private Equity
    • Real Estate
    • Gaming
    • Healthcare
    • Luxury
    • Infrastructure
  • Foreign languages: English, French


  • Joined the firm in 2019
  • Former Board Member (2021-2023)
  • Member of the Private Equity Focus Team
  • Member of the Real Estate Focus Team
  • Worked at a major Italian law firm in Milan and was partner at Lombardi e Associati from 2005 to 2019

Ranking and Awards

The Chambers & Partners and The Legal 500 EMEA international legal directories list Stefano as an expert in Italy in corporate law.


“Stefano Nanni Costa is an outstanding lawyer for technical skills and matter management. Clients are in safe hands with Stefano.”

(The Legal 500 EMEA)


  • Member of the Italian Bar
  • Law degree from Università Cattolica di Milano

BonelliErede renews its board and executive leadership and makes up four new partners - 31 May 2021

At BonelliErede’s partners’ meeting on Friday, 28 May, the partnership was called on to renew the board and executive roles of the firm – leader in Italy for legal and tax services. Board members Andrea Carta Mantiglia, Stefano Nanni Costa and Stefano Simontacchi are now joined by Giulia …

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BonelliErede and Lombardi e Associati: integration is a go - 27 May 2019

The integration with Lombardi e Associati was unanimously approved at BonelliErede’s partners’ meeting today. Lombardi e Associati is one of the leading Italian independent law firms in litigation and corporate law and advises Italian and foreign companies, banks and insurers, investment fu …

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