Madeline McDonnell



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Madeline is a partner in the Corporate Department in Matheson where she specialises in mergers and acquisitions (public and private), equity capital markets transactions and securities law.

Madeline has advised on many of the most significant Irish corporate transactions of recent years.

In addition to her cross-border M&A experience across a range of industries and sectors, Madeline has particular expertise advising on joint ventures, private equity, corporate restructurings, reorganisations and capital-raising transactions.

Madeline also counsels clients on company law compliance and corporate governance, including directors’ duties and responsibilities.

Madeline has contributed articles to international legal publications on mergers and acquisitions and corporate law in Ireland.

Experience Highlights

Recent transactions on which Madeline has advised include:

  • Willis on its $18 billion merger of equals with Towers Watson, and the listing of the new Irish holding company, Willis Towers Watson plc, on Nasdaq
  • Worldview Capital on its successful hostile takeover of Petroceltic International plc (ESM; AIM)
  • Weatherford International plc (NYSE) on a $1 billon registered direct offering of ordinary shares and warrants to acquire ordinary shares and a $1.1 billion underwritten public offering of senior exchangeable notes
  • Abtran on the investment by Carlyle Cardinal Ireland
  • Allergan’s $66 billion merger with Actavis (NYSE)
  • Perella Weinberg Partners LP on its role as financial adviser to US medical device maker Medtronic, Inc. on its $42.9 billion acquisition of Irish-based Covidien
  • Actavis Inc (NYSE) on its $8.5 billion acquisition of Warner Chilcott plc (NASDAQ) and redomestication to Ireland
  • the $2.6 billion acquisition of Auxilium Pharmaceuticals by Endo International
  • William Grant & Sons Limited on the €300 million acquisition of the international spirits division of C&C Group Plc and the sale of Carolans, Frangelico and Irish Mist brands to Italian drinks producer Gruppo Campari for €129 million
  • BC Partners on the Irish aspects of the €600 million acquisition of the Spotless Group

Madeline McDonnell is named a Rising Star
IFLR1000 2017


Trinity College Dublin, LLB (First class)
Admitted as a Solicitor, Law Society of Ireland

Related Practice Areas

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