Marjorie C. Holmes

Partner

Marjorie focuses on competition law in several sectors, including aviation, marine, insurance, construction, energy, life sciences, and finance. Marjorie has represented companies in a number of important investigations by the European Commission and the UK Competition Authorities. She has significant merger control experience, including dealing with phase 2 clearances. Marjorie's work also includes public interest tests, national security concerns, and price control references – key legal themes that have characterised the competition landscape in recent years. She is one of the few lawyers with UK High Court, Court of Appeal, and ECJ private actions competition law-related experience, including running cases to successful judgments.

Experience

Representative matters

Contributed to the World Bank Group research on competition law for the United Kingdom.
Provided merger control advice to Navig8 in relation to a complex transaction clearances obtained in 11 jurisdictions (Brazil, China, COMESA, Egypt, European Union, Morocco, Saudi Arabia, South Africa, South Korea, Turkey, and the United States).
Acting for a TV production company in relation to the UK CMA cartel investigation into production of non sports content.

Recognitions

  • Non-Governmental Adviser, International Competition Network
  • Recommended Global Leader in GCR’s Who’s Who Legal: Competition
  • Listed as a “Leading Partner” in The Legal 500 UK 2026 for EU and Competition

Credentials

Education

  • University of Cambridge
  • London School of Economics and Political Science, BSc, Faculty of Economics

Professional admissions & qualifications

  • England and Wales
  • Ireland

Professional affiliations

  • Member, British Maritime Law Association, European Group

News

Media mentions

Blogs

Events