Image: Ronan P. O'Sullivan

Ronan P. O'Sullivan

Partner, Corporate Department


Ronan O’Sullivan focuses his practice on mergers and acquisitions and corporate finance and has considerable experience in private and public takeover work, joint ventures and domestic and cross-border restructurings.


  • Recommended for Corporate/ M&A – Chambers U.K., 2013 - 2020
  • Interviewees say: "He's highly pragmatic, really thoughtful, a fantastic negotiator and someone who has a really nice temperament." - Chambers U.K., 2020
  • Ronan O'Sullivan of Paul Hastings is considered a "seasoned professional who is practical and very commercial in his advice." - Chambers U.K., 2019
  • Described by clients as a "bright, gifted lawyer who really guides clients well" – Chambers U.K., 2018 
  • Ronan O'Sullivan "knows our business really well; he can apply the law to the business in a practical way." He is a well-regarded name in the field and has recently advised clients in the sports, shipping and private equity areas" – Chambers U.K., 2017 
  • The "extremely knowledgeable and very deal-oriented" Ronan O'Sullivan heads the corporate practice at Paul Hastings. Clients appreciate that "he's very personable" and has "taken the time to understand us and our business - Chambers U.K., 2016
  • Ronan O’Sullivan gains plaudits from commentators for his creativity and work ethic and is described as "incredibly efficient" – Chambers U.K., 2015
  • Ronan O'Sullivan is "exceptionally responsive" and "sensible, pragmatic and helpful," clients say – Chambers U.K., 2014
  • Ronan O'Sullivan is lauded by clients, who say: "We value him highly; he is well regarded in the legal department and very well respected in the industry" – Chambers U.K., 2013


  • The University of Oxford – St Edmund Hall College, B.C.L., 1995 (First-class honours)



Mr. O’Sullivan’s recent experience includes advising:

  • City Football Group Limited, the owner and operator of football clubs, with total or partial ownership of clubs in eight major cities across the world: Manchester City in the UK, New York City FC in the US, Melbourne FC in Australia, Yokohama F. Marinos in Japan, Club Atletico Torque in Uruguay, Girona Futbol Club in Spain, Sichuan Jiuniu FC in China, and Mumbai City Football Club in India on: 
  • the investment by a consortium of high-profile Chinese institutional investors led by China Media Capital in 2015; and
  • the investment by U.S. private equity firm Silver Lake, which saw Silver Lake invest $500 million for just over 10% of the company’s post-investment equity, valuing the business at approximately $4.8 billion.
  • Jacobs Engineering Group on its acquisition of Wood Group’s Nuclear business for £250 million;
  • Teleperformance SE in the Company's acquisition of Intelenet from Blackstone for a total consideration of $1 billion;
  • Madison Solutions Energy Corporation, Madison Industries' energy division, on its acquisition of Centek Holdings Limited and its subsidiaries, a leading designer and manufacturer of revolutionary bow spring centralizers which provide optimum pipe centralization products;
  • Jacobs Engineering on its agreement with Saudi Aramco to form a Saudi Arabian-based joint venture to provide PMCM services to clients in the Kingdom of Saudi Arabia and across the Middle East and North Africa; 
  • Aman Resorts on a number of confidential transactions; 
  • Starwood Capital on its joint venture with Tunstall Real Estate Management to implement the acquisition of U.K. social housing regeneration company, Pinnacle Group Limited; 
  • An ad hoc committee of various bondholders on the recapitalisation of the Co-operative Bank plc
  • DXC Technology (formerly Computer Sciences Corporation) on its strategic alliance with, and investment in, eBECS Limited; 
  • Filtration Group on the acquisition of the Porous Technologies business of U.K.-based industrial group Essentra plc. for £220 million; and
  • City Football Group, the owner of football-related businesses including Manchester City FC, New York City FC, Melbourne City FC, and a minority shareholder in Yokohama F. Marinos, on the $400m investment by China Media.



    Engagement & Publications

    • Brexit – The UK's departure from the single market, January 2017
    • UK chapter of China Law & Practice’s 2016 China Outbound Investment Guide
    • PLC Magazine Pricing Mechanisms: Locked Box vs Completion Accounts, February 2012

    Practice Areas

    Mergers and Acquisitions
    Private Equity
    Securities and Capital Markets
    Emerging Growth Companies
    Bank Regulatory
    Life Sciences and Healthcare
    Fintech and Payments
    Payment Systems
    ESG & Impact
    ESG Risk, Strategy, and Compliance
    Impact Investing




    England and Wales Solicitor


    University of Oxford - St. Edmund Hall, B.C.L. 1995
    Trinity College Dublin, the University of Dublin, LL.B. 1994

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